Vacuum seal control method and vacuum machine

Abstract

The present application relates to the technical field of vacuum sealing machine, and discloses a vacuum sealing control method and a vacuum machine, which comprises the following steps: making the suction disc body on the upper cover assembly correspondingly fit with the fitting area on the lower cover assembly, forming a chamber between the two; automatically pumping the chamber through the air extraction part, reducing the height of the suction disc body, until the upper cover assembly and the lower cover assembly are in a sealed fit state, and then sealing the packaging bag. After the upper cover assembly is positioned and placed on the lower cover assembly, the air extraction part can automatically start pumping the chamber, and manual pressing operation on the upper cover assembly is not needed, which is convenient for people with less strength to use. Furthermore, the sealing and fitting process of the upper cover assembly and the lower cover assembly can be automatically completed before the packaging bag is sealed, which further ensures effective sealing of the packaging bag and prevents the upper cover assembly and the lower cover assembly from not being completely sealed and compressed, which may result in sealing failure of the packaging bag.

Description

Technical Field

[0001] This invention relates to the field of vacuum sealing machine technology, and more specifically, to a vacuum sealing control method and a vacuum machine. Background Technology

[0002] A vacuum sealing machine is used to seal food after it is placed in a packaging bag. The air inside the bag is then extracted using an air extraction device to achieve a predetermined vacuum level. By vacuuming the packaging bag, food spoilage can be effectively prevented and food can be preserved more easily.

[0003] In a two-piece sealing machine, the opening of the packaging bag is placed in the designated position, and then the upper and lower covers are pressed together by external force. The upper and lower covers are secured by corresponding clips, maintaining a pressed state. After sealing, the upper and lower covers are released from the clips, and the sealed portion of the packaging bag can be removed. However, this method usually requires manual pressing of the upper and lower covers with a certain amount of force. For people with less strength, this can lead to insufficient pressure and difficulty in securing the covers. Furthermore, some people may forget to press the upper cover after placing it on the lower cover before starting the vacuum sealer. Both of these situations result in the upper and lower covers not sealing properly, failing to seal the opening of the packaging bag.

[0004] Therefore, it is necessary to propose a vacuum sealing control method and a vacuum machine to at least partially solve the problems existing in the prior art. Summary of the Invention

[0005] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. The summary section of this invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] To at least partially solve the above problems, the present invention provides a vacuum sealing control method, comprising:

[0007] The suction cup body on the upper cover assembly is aligned with the fitting area on the lower cover assembly, forming a cavity between the two.

[0008] The suction unit automatically evacuates the chamber, lowering the height of the suction cup body until the upper and lower cover components are sealed together, and then the packaging bag is sealed.

[0009] Preferably, it also includes: after the packaging bag is sealed, the chamber is connected to the outside through the venting section to separate the upper cover assembly and the lower cover assembly.

[0010] Preferably, the chamber is connected to the suction section via a suction air passage, and the chamber is connected to the venting section via a venting air passage.

[0011] Preferably, the chamber is automatically evacuated by the evacuation unit, lowering the height of the suction cup body until the upper cover assembly and the lower cover assembly are in a sealed fit, including:

[0012] After the upper cover assembly is positioned on the lower cover assembly, the air extraction unit starts to evacuate the chamber.

[0013] The air pressure inside the chamber is detected, and the corresponding air pressure judgment data is obtained;

[0014] When the air pressure data meets the sealing conditions, the upper cover assembly and the lower cover assembly are in a sealed and fitted state.

[0015] Preferably, the air pressure judgment data includes: a first judgment result of the air pressure inside the chamber when the chamber is being evacuated; and a second judgment result of the air pressure inside the chamber when the evacuation stops.

[0016] Preferably, the air pressure judgment data satisfying the sealing conditions includes: the first judgment result satisfying the first set condition, and the second judgment result satisfying the second set condition.

[0017] Preferably, obtaining the first determination result of the air pressure in the chamber includes:

[0018] When evacuating the chamber, the air pressure in the chamber corresponding to the set evacuation time is obtained, and it is determined whether the air pressure is within the set air pressure range to obtain the first judgment result.

[0019] If the first judgment result is that the air pressure is not within the set air pressure range, then the first judgment result does not meet the first set condition;

[0020] If the first judgment result is that the air pressure is within the set air pressure range, then the first judgment result satisfies the first set condition.

[0021] Preferably, obtaining the second determination result of the air pressure in the chamber includes:

[0022] When the pumping stops, within a set time, the rate of change of air pressure in the chamber is obtained, and it is determined whether the rate of change is positive, thus obtaining a second judgment result;

[0023] If the second judgment result is that the rate of change is not positive, then the second judgment result satisfies the second set condition;

[0024] If the second judgment result is a positive rate of change, then based on the preset time required to seal the packaging bag, it is predicted whether the air pressure in the chamber when the sealing is completed is less than the preset air pressure. If yes, the second judgment result satisfies the second set condition; otherwise, the second judgment result does not satisfy the second set condition.

[0025] The present invention also provides a vacuum machine employing the vacuum sealing control method described herein, comprising: an upper cover assembly and a lower cover assembly, wherein the upper cover assembly is provided with at least two suction cup assemblies, and the lower cover assembly is provided with a fitting area corresponding to the suction cup assemblies; an air extraction section and an air release section are provided on the upper cover assembly, and the suction cup assemblies are respectively connected to the air extraction section and the air release section.

[0026] Preferably, the suction cup assembly includes: a suction cup body, which is connected to the upper cover assembly by a fixing pin and a fixing buckle; the upper cover assembly is provided with a receiving groove that allows the suction cup body to retract into its interior.

[0027] Compared with the prior art, the present invention has at least the following beneficial effects:

[0028] The vacuum sealing control method and vacuum machine described in this invention can automatically start the air extraction unit to extract air from the chamber after the upper cover assembly is positioned on the lower cover assembly. There is no need to manually press the upper cover assembly, making it easy for people with less strength to use. Furthermore, the sealing and bonding process of the upper cover assembly and the lower cover assembly can be completed automatically before sealing the packaging bag, further ensuring effective sealing of the packaging bag and preventing sealing failure of the packaging bag due to incomplete sealing and pressing of the upper cover assembly and the lower cover assembly.

[0029] The vacuum sealing control method and vacuum machine described in this invention, as well as other advantages, objectives and features of this invention, will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0030] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0031] Figure 1 This is a flowchart of the vacuum sealing control method described in this invention;

[0032] Figure 2 This is a flowchart of step S2 in the vacuum sealing control method of the present invention;

[0033] Figure 3 This is a schematic diagram of the structure of the vacuum machine described in this invention;

[0034] Figure 4This is a schematic diagram of the upper cover assembly in the vacuum machine described in this invention;

[0035] Figure 5 This is a schematic diagram of the structure of the cavity formed by the suction cup body and the contact area in the vacuum machine described in this invention;

[0036] Figure 6 This is a schematic diagram of the suction cup assembly in the vacuum machine described in this invention;

[0037] Figure 7 This is a schematic diagram of the mounting block disposed on the upper cover assembly in the vacuum machine of the present invention. Detailed Implementation

[0038] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it based on the description.

[0039] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0040] like Figure 1 As shown, the present invention provides a vacuum sealing control method, comprising:

[0041] S1. Make the suction cup body 31 on the upper cover assembly 1 and the fitting area 4 on the lower cover assembly 2 fit together, forming a cavity A between the two.

[0042] S2. The air is automatically drawn from the chamber A by the air extraction unit 5, so that the height of the suction cup body 31 is lowered until the upper cover assembly 1 and the lower cover assembly 2 are in a sealed and fitted state, and then the packaging bag is sealed.

[0043] When sealing the packaging bag, place the opening of the packaging bag at the sealing position of the lower cover assembly 2, and then position the upper cover assembly 1 on the lower cover assembly 2. Then, the suction cup body 31 and the bonding area 4 form a chamber A. At this time, the height of the suction cup body 31 is the initial height, and the upper cover assembly 1 and the lower cover assembly 2 are not completely sealed and bonded.

[0044] Before sealing the packaging bag, the vacuum unit 5 is activated to automatically evacuate chamber A, creating a negative pressure inside chamber A. This lowers the height of the vertically retractable suction cup body 31, causing the upper cover assembly 1 to descend. When the suction cup body 31 is fully retracted into the upper cover assembly 1, the upper cover assembly 1 and the lower cover assembly 2 are in a sealed fit, indicating that the packaging bag can be sealed at this time. For example, vacuum machines are generally equipped with a button for performing the sealing operation. When the button is pressed, the vacuum unit 5 is first controlled to evacuate chamber A. Then, when the upper cover assembly 1 and the lower cover assembly 2 are in a sealed fit, the sealing operation is performed. This ensures that the upper cover assembly 1 and the lower cover assembly 2 are in a sealed fit before each sealing of the packaging bag, guaranteeing the effective sealing of the packaging bag.

[0045] Using the above method, after the upper cover assembly 1 is positioned on the lower cover assembly 2, the air extraction unit 5 is automatically activated to extract air from the chamber A. There is no need to manually press the upper cover assembly 1. Furthermore, the sealing and bonding process between the upper cover assembly 1 and the lower cover assembly 2 can be completed automatically before the packaging bag is sealed, further ensuring effective sealing of the packaging bag.

[0046] like Figure 1 As shown, in one embodiment, it further includes:

[0047] S3. After the packaging bag is sealed, the chamber A is connected to the outside through the venting part 6, and the upper cover assembly 1 and the lower cover assembly 2 are separated.

[0048] Furthermore, chamber A is connected to the suction section 5 via a suction air passage, and chamber A is connected to the venting section 6 via a venting air passage.

[0049] After the packaging bag is sealed, the venting section 6 is opened to connect the venting passage with the outside atmosphere. When gas enters the negative pressure chamber A, its volume increases, and the suction cup body 1 will return to its initial height, lifting the upper cover assembly 1. At this time, the upper cover assembly 1 and the lower cover assembly 2 can be separated, and the packaging bag can be taken out. It is convenient to use.

[0050] like Figure 2 As shown, in one embodiment, the suction unit 5 automatically evacuates air from chamber A, lowering the height of the suction cup body 31 until the upper cover assembly 1 and the lower cover assembly 2 are in a sealed fit, including:

[0051] S21. After the upper cover assembly 1 is positioned on the lower cover assembly 2, the air extraction unit 5 starts to perform air extraction operation on chamber A.

[0052] S22. Detect the air pressure in chamber A and obtain the corresponding air pressure judgment data;

[0053] S23. When the air pressure judgment data meets the sealing conditions, the upper cover assembly 1 and the lower cover assembly 2 are in a sealed and fitted state.

[0054] It also includes issuing a leak alarm when the air pressure data does not meet the sealing conditions.

[0055] When the upper cover assembly 1 is placed on the lower cover assembly 2, if the suction cup body 31 and the contact area 4 are not properly fitted (e.g., there are foreign objects between them, or the suction cup body 31 is not properly placed), air leakage will occur. Furthermore, if the connection between the suction and venting air paths is loose or the venting part 6 is not sealed, air leakage will also occur. Therefore, during suction, the air pressure in chamber A needs to be detected and assessed to obtain air pressure data. If leakage occurs, the air pressure will change accordingly, so it is necessary to... The sealing conditions are set so that the upper cover assembly 1 and the lower cover assembly 2 are sealed and fitted only when the air pressure judgment data meets the sealing conditions. If the air pressure judgment data does not meet the sealing conditions, it indicates that the air leakage is serious and the upper cover assembly 1 and the lower cover assembly 2 cannot be sealed and fitted. An air leakage alarm will be issued. First, it is necessary to check whether the suction cup body 31 and the bonding area 4 are properly bonded. If the two are properly bonded but air leakage still occurs, then check whether the connection between the suction air path and the venting air path or the venting part 6 is not properly sealed. This will allow for timely detection of the air leakage point.

[0056] Furthermore, the air pressure judgment data includes: a first judgment result of the air pressure in chamber A when air is pumped out; and a second judgment result of the air pressure in chamber A when pumping stops.

[0057] If the air leakage is significant, the air pressure inside chamber A can be used to determine if there is a leak when the air is evacuated. If the air leakage is not obvious, the air pressure inside chamber A may not be able to detect the leak when the air is evacuated. Therefore, when the evacuation stops, the air pressure inside chamber A needs to be checked again to determine whether the air leakage will affect the sealing of the packaging bag.

[0058] Furthermore, the air pressure judgment data meeting the sealing conditions includes: the first judgment result meeting the first set condition, and the second judgment result meeting the second set condition.

[0059] Based on the above air pressure judgment data, two set conditions are set respectively. Only when both the first judgment result and the second judgment result meet the corresponding set conditions can it be indicated that the air pressure judgment data meets the sealing conditions and the sealing operation of the packaging bag can continue.

[0060] Furthermore, obtaining the first determination result of the air pressure inside chamber A includes:

[0061] When evacuating chamber A, the air pressure inside chamber A is obtained when the set evacuation time is reached, and it is determined whether the air pressure is within the set air pressure range to obtain the first judgment result.

[0062] If the first judgment result is that the air pressure is not within the set air pressure range, then the first judgment result does not meet the first set condition;

[0063] If the first judgment result is that the air pressure is within the set air pressure range, then the first judgment result satisfies the first set condition.

[0064] The air pressure range is set as [P1, P2], where P1 is the minimum air pressure value (the ideal value of P1 is zero) and P2 is the maximum air pressure value that can make the upper cover assembly 1 and the lower cover assembly 2 seal and fit together.

[0065] If the first judgment result does not meet the first set condition, the air pressure judgment data does not meet the sealing condition, indicating that there is an air leak; if the first judgment result meets the first set condition, the pumping stops, and the second judgment result of the air pressure in chamber A is obtained.

[0066] Since the volume of the suction and venting air paths and chamber A is fixed, the volume error of chamber A formed each time is small. The suction unit 5 performs suction with the same power each time. Therefore, if there is no leakage, when suction is completed within the set suction time, the air pressure in chamber A will be within the set air pressure range, and the corresponding upper cover assembly 1 and lower cover assembly 2 can be sealed and fitted. In the case of more serious leakage, when suction is completed within the set suction time, air will be drawn in from the leaking location while suction is being performed. Therefore, the air pressure in chamber A will exceed the set air pressure range. It is then known that the air pressure judgment data does not meet the sealing conditions, that is, the upper cover assembly 1 and lower cover assembly 2 cannot be sealed and fitted, and the leakage needs to be checked.

[0067] Furthermore, obtaining the second determination result of the air pressure in chamber A includes:

[0068] When the pumping stops, within a set time, the rate of change of air pressure in chamber A is obtained, and it is determined whether the rate of change is positive, thus obtaining a second judgment result;

[0069] If the second judgment result is that the rate of change is not positive, then the second judgment result satisfies the second set condition;

[0070] If the second judgment result is a positive rate of change, then based on the preset time required to seal the packaging bag, it is predicted whether the air pressure in chamber A is less than the preset air pressure when the sealing is completed. If yes, the second judgment result satisfies the second set condition; otherwise, the second judgment result does not satisfy the second set condition.

[0071] Preset air pressure P sThe pressure is less than the maximum pressure value P2 in the set pressure range [P1, P2], and the two have the following relationship:

[0072] (P2-P s ) / P s =0.1

[0073] Set the preset air pressure P s The pressure is set to be less than the maximum air pressure value P2, taking into account the error of the predicted air pressure, to further ensure that the upper cover assembly 1 and the lower cover assembly 2 can be sealed and fitted, thereby effectively sealing the packaging bag.

[0074] When the first judgment result meets the first set condition, the pumping stops, and within a set time, the rate of change of air pressure in chamber A is continuously obtained. When the rate of change is positive, it indicates that the air pressure in chamber A has increased, and there is a leak. When the rate of change is zero, it indicates that the air pressure in chamber A has not changed, and there is no leak. Therefore, judging whether the rate of change of air pressure is positive can determine whether a leak has occurred.

[0075] Since the air pressure change in chamber A is small in a short time when the leakage is very small, it will not affect the sealing operation of the packaging bag. Therefore, when the rate of change is positive, further judgment can be made. That is, based on the preset time required for sealing the current packaging bag and the change in air pressure per unit time, the air pressure in chamber A when sealing is completed is predicted to determine whether the sealing operation of the packaging bag can be completed under a small leakage. If yes, the second judgment result meets the second set condition, indicating that the air pressure judgment data meets the sealing condition and the packaging bag can be sealed. If no, the second judgment result does not meet the second set condition, indicating that the air pressure judgment data does not meet the sealing condition, and a leakage alarm is issued to check the leakage situation.

[0076] like Figure 3 As shown, the present invention also provides a vacuum machine, which adopts the vacuum sealing control method described in the present invention, including: an upper cover assembly 1 and a lower cover assembly 2, wherein the upper cover assembly 1 is provided with at least two suction cup assemblies 3, and the lower cover assembly 2 is provided with a fitting area 4 corresponding to the suction cup assemblies 3; an air extraction part 5 and an air release part 6 are provided on the upper cover assembly 1, and the suction cup assemblies 3 are respectively connected to the air extraction part 5 and the air release part 6.

[0077] like Figures 5-7 As shown, the suction cup assembly 3 further includes: a suction cup body 31, which is connected to the upper cover assembly 1 by a fixing pin 32 and a fixing buckle 33; the upper cover assembly 1 is provided with a receiving groove 13 that allows the suction cup body 31 to retract into its interior.

[0078] The suction cup body 31 has a certain height. When the chamber A formed by the suction cup body 31 and the mating area 4 is evacuated, the suction cup body 31 can retract into the receiving groove 13, so that the upper cover assembly 1 and the lower cover assembly 2 can be sealed and mated.

[0079] like Figure 6 and Figure 7 As shown, the suction cup body 31 is further provided with a connecting block 311 at the top, and an mounting block 11 is provided on the upper cover assembly 1. The bottom of the mounting block 11 is provided with a mounting groove 12 corresponding to the connecting block 311, and a receiving groove 13 for accommodating the suction cup body 31. The fixing pin 32 passes through the connecting block 311 and the mounting groove 12, and is limited and connected to the fixing buckle 33 at one end, and limited and connected to the connecting block 311 at the other end.

[0080] like Figure 6 As shown, the outer side of the fixing pin 32 is provided with an annular groove 321, and the annular groove 321 is limitedly connected to the fixing buckle 33 arranged on the top of the mounting block 11.

[0081] When installing the suction cup body 31, the connecting block 311 is inserted into the mounting groove 12, and then the fixing pin 32 passes through the connecting block 311 and the mounting groove 12 from bottom to top. Its bottom is limited and abuts against the bottom surface of the connecting block 311, and the part of the fixing pin 32 that passes through the mounting groove 12 is axially limited by the fixing buckle 33. The fixing pin 32 fixes the connecting block 311 in the mounting groove 12, thus completing the installation of the suction cup body 31.

[0082] like Figure 4 As shown, further, the cavity A formed by the suction cup body 31 and the contact area 4 is connected to the air pipe adapter 7 through the first air pipe 8, the air pipe adapter 7 is connected to the air extraction part 5 through the second air pipe 9, and the air pipe adapter 7 is connected to the air release part 6 through the third air pipe 10.

[0083] The chamber A, the first air guide tube 8, the air tube adapter 7, the second air guide tube 9, and the air extraction section 5 form an air extraction path;

[0084] The chamber A, the first air guide tube 8, the air tube adapter 7, the third air guide tube 10, and the venting section 6 form a venting air path.

[0085] Furthermore, the fixing pin 32 has a through hole inside for connecting the first air guide tube 8 and the chamber A.

[0086] Furthermore, the extraction unit 5 is a vacuum pump;

[0087] The venting section 6 is either a mechanical venting valve or an electromagnetic venting valve.

[0088] The air extraction unit 5 can be a vacuum pump or any component capable of performing air extraction.

[0089] The venting section 6 can be electrically controlled or manually controlled. When the venting section 6 is manually controlled, it can be any venting valve in the prior art that can be connected to the third air duct 10 and remains in a sealed state when performing air extraction operations on the space area; for example, a rubber stopper or a push-button venting valve. When the venting section 6 is electrically controlled, it can be any electromagnetic venting valve in the prior art, which can control whether the third air duct 10 is connected to the outside atmosphere. The specific implementation structure and principle of the venting section 6 in the prior art will not be described here.

[0090] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to 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 this invention.

[0091] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," 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, an electrical connection, or a connection that allows communication between them; 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 explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0092] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the present invention, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A vacuum sealing control method, characterized in that, include: The suction cup body on the upper cover assembly is aligned with the fitting area on the lower cover assembly, forming a cavity between the two. The suction unit automatically evacuates the chamber, lowering the height of the suction cup body until the upper and lower cover components are sealed together, and then the packaging bag is sealed. The suction cup body is automatically evacuated from the chamber by the suction unit, lowering its height until the upper and lower cover assemblies are in a sealed fit, including: After the upper cover assembly is positioned on the lower cover assembly, the air extraction unit starts to evacuate the chamber. The air pressure inside the chamber is detected, and the corresponding air pressure judgment data is obtained; When the air pressure data meets the sealing conditions, the upper cover assembly and the lower cover assembly are in a sealed and fitted state. The air pressure judgment data includes: a first judgment result of the air pressure inside the chamber when the chamber is being evacuated; and a second judgment result of the air pressure inside the chamber when the evacuation stops. The air pressure judgment data meets the sealing conditions, including: the first judgment result meets the first set condition, and the second judgment result meets the second set condition; The second determination result of the air pressure in the chamber includes: When the pumping stops, within a set time, the rate of change of air pressure in the chamber is obtained, and it is determined whether the rate of change is positive, thus obtaining a second judgment result; If the second judgment result is that the rate of change is not positive, then the second judgment result satisfies the second set condition; If the second judgment result is a positive rate of change, then based on the preset time required to seal the packaging bag, it is predicted whether the air pressure in the chamber when the sealing is completed is less than the preset air pressure. If yes, the second judgment result satisfies the second set condition; otherwise, the second judgment result does not satisfy the second set condition.

2. The vacuum sealing control method according to claim 1, characterized in that, Also includes: After the packaging bag is sealed, the chamber is connected to the outside through the venting section, separating the upper cover assembly and the lower cover assembly.

3. The vacuum sealing control method according to claim 1, characterized in that, The chamber is connected to the suction section via a suction air passage, and the chamber is connected to the venting section via a venting air passage.

4. The vacuum sealing control method according to claim 1, characterized in that, The first determination result of the air pressure in the chamber includes: When evacuating the chamber, the air pressure in the chamber corresponding to the set evacuation time is obtained, and it is determined whether the air pressure is within the set air pressure range to obtain the first judgment result. If the first judgment result is that the air pressure is not within the set air pressure range, then the first judgment result does not meet the first set condition; If the first judgment result is that the air pressure is within the set air pressure range, then the first judgment result satisfies the first set condition.

5. A vacuum machine, employing the vacuum sealing control method according to any one of claims 1-4, characterized in that, include: The upper cover assembly and the lower cover assembly are provided with at least two suction cup assemblies, and the lower cover assembly is provided with a fitting area corresponding to the suction cup assemblies; an air extraction part and an air release part are provided on the upper cover assembly, and the suction cup assemblies are respectively connected to the air extraction part and the air release part.

6. The vacuum machine according to claim 5, characterized in that, The suction cup assembly includes: a suction cup body, which is connected to the upper cover assembly by a fixing pin and a fixing buckle; the upper cover assembly is provided with a receiving groove that allows the suction cup body to retract into its interior.

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