Vacuum sealing machine and sealing method

Abstract

The invention relates to a vacuum sealing machine and a sealing method, and relates to the technical field of sealing. The vacuum sealing machine comprises a box body, a cover body, a vacuumizing assembly and a negative pressure balance assembly, the cover body can be controlled to be covered with or separated from the box body, and the cover body is covered with the box body to define a sealed water storage cavity; the vacuumizing assembly is connected with the water storage cavity and used for extracting air in the water storage cavity to form a vacuum environment; the negative pressure balance assembly is connected with the water storage cavity so that gas can be conveyed to the water storage cavity in the vacuum state, and the water storage cavity can reach the set negative pressure state. The sealing failure phenomenon caused by the fact that flowing-out liquid takes away sealing heat of the vacuum bag can be avoided.

Description

Technical Field

[0001] The present application relates to the field of sealing technology, and in particular to a vacuum sealing machine and a sealing method. Background Art

[0002] In the related art, when a vacuum packaging and sealing machine vacuum-seals a vacuum bag containing wet goods, an air pressure difference will be generated inside and outside the vacuum bag during and after the vacuuming process, which will cause the liquid in the bag to be continuously squeezed out of the bag opening, thereby taking away the heat in the sealing stage, resulting in the inability to obtain a reliable sealing effect, causing the vacuum bag containing wet goods to leak after vacuum sealing and fail to maintain freshness in the vacuum bag. Summary of the invention

[0003] Based on this, it is necessary to provide a vacuum sealing machine and a sealing method to address the problem that vacuum sealing of vacuum bags containing wet goods cannot be performed reliably and stably.

[0004] To achieve the above objectives, the technical solutions adopted in this application are as follows:

[0005] In a first aspect, an embodiment of the present application provides a vacuum sealer, comprising:

[0006] Box body;

[0007] A cover body, which can be controlled to cover or separate from the box body, and is closed with the box body to define a sealed water storage cavity;

[0008] A vacuum pumping assembly connected to the water storage chamber and used to extract the internal air of the water storage chamber to form a vacuum environment;

[0009] A negative pressure balancing component is connected to the water storage chamber to transport gas to the water storage chamber in a vacuum state so that the water storage chamber reaches a set negative pressure state.

[0010] In one embodiment of the first aspect, the vacuum sealer further comprises a heating element and a pressing element, wherein the heating element and the pressing element are respectively installed on the box body and the cover body and are located on a side of the water storage chamber close to the opening of the vacuum sealer.

[0011] In one embodiment of the first aspect, the vacuum assembly includes an air pump, the water storage chamber is provided with an air nozzle, and the air nozzle is connected to a pipeline of the air pump.

[0012] In one embodiment of the first aspect, the negative pressure balance component includes an air bag and a control valve, and the control valve is connected to the water storage chamber and the air bag pipeline respectively.

[0013] In one embodiment of the first aspect, the vacuum assembly further includes an air release valve, and a pipeline of the air release valve is connected between the air pump and the water storage chamber.

[0014] In one embodiment of the first aspect, the vacuum assembly further includes an air pressure sensor, and the air pressure sensor is connected to the water storage chamber pipeline.

[0015] In one of the embodiments of the first aspect, the negative pressure balance assembly includes a sleeve, a piston and an elastic member, one end of the sleeve is connected to the water storage chamber pipeline, the piston is slidably inserted into the sleeve, the elastic member is arranged in the sleeve, and both ends are respectively connected to the piston and the sleeve.

[0016] In one of the embodiments of the first aspect, the negative pressure balancing assembly includes a pressure limiting valve, which is communicated with the water storage chamber and can release air into the water storage chamber.

[0017] In one of the embodiments of the first aspect, the vacuum sealer further includes a clamping assembly, which includes two pressing rings arranged opposite to each other, the two pressing rings are respectively installed on the box body and the cover body, and are arranged on the periphery of the water storage cavity.

[0018] In a second aspect, the present application also provides a sealing method, which is applied to the vacuum sealing machine described in any of the above embodiments, and the sealing method includes:

[0019] Putting the opening of a vacuum bag containing wet goods into the opening side of the vacuum sealer, and making the opening of the vacuum bag at least partially located in the water storage cavity;

[0020] Closing the cover body, controlling the vacuum assembly to extract the internal air connected to the water storage chamber until the internal liquid of the vacuum bag fills the bag opening;

[0021] Controlling the negative pressure balance component to release air into the water storage chamber until the air pressure inside and outside the vacuum bag reaches air pressure balance;

[0022] After the vacuum sealer performs the heating and sealing operation, the sealed vacuum bag is taken out.

[0023] Compared with the related art, the beneficial effects of the present application are as follows: the present application provides a vacuum sealer and a sealing method, which can be used for vacuum sealing of a vacuum bag containing wet goods. The vacuum sealer includes a box body, a cover body, a vacuum assembly and a negative pressure balance assembly. The cover body can be controlled to close or separate from the box body to achieve the closing and opening of the vacuum sealer. The vacuum assembly can vacuum the vacuum bag and the water storage chamber after the vacuum sealer is closed. The negative pressure balance assembly can deflate the water storage chamber when the liquid inside the vacuum bag fills the bag opening, so that the air pressure inside and outside the vacuum bag reaches a balance, so that the liquid will not flow out of the bag opening. In this way, during the vacuum sealing process, the mouth of the vacuum bag containing wet goods is placed on the opening side of the vacuum sealer, and part of the bag mouth is located in the water storage chamber. After vacuuming and reaching air pressure balance, when the vacuum sealer performs heating sealing, the internal liquid of the vacuum bag will not continue to flow out, thereby avoiding the phenomenon that the outflowing liquid takes away the sealing heat of the vacuum bag and causes sealing failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 This is a schematic diagram of the isometric structure of a vacuum sealer in some embodiments of the present application;

[0026] Figure 2 This is a schematic diagram of the structure of the vacuum assembly in some embodiments of the present application;

[0027] Figure 3 This is a schematic diagram of the structure of the water storage chamber in some embodiments of the present application;

[0028] Figure 4 This is a schematic cross-sectional structure diagram of a vacuum sealer in some embodiments of the present application;

[0029] Figure 5 for Figure 4 A schematic diagram of the enlarged structure of part A shown;

[0030] Figure 6 This is a schematic diagram of the structure of a negative pressure balance assembly in some embodiments of the present application;

[0031] Figure 7 This is a schematic diagram of the process of the sealing method in some embodiments of the present application.

[0032] Description of reference numerals:

[0033] 100, vacuum sealer; 110, box body; 111, water storage chamber; 112, air nozzle; 120, cover body; 130, vacuum assembly; 131, air pump; 132, air release valve; 133, air pressure sensor; 140, negative pressure balance assembly; 141, air bag; 142, control valve; 143, sleeve; 144, piston; 145, elastic member; 146, opening; 150, sealing assembly; 151, heating member; 152, pressing member; 160, pressing assembly; 161, pressing ring;

[0034] 200. Vacuum bag. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0036] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0037] In addition, if the term "and / or" appears, "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the objects associated before and after are in an "or" relationship. If the terms "first" and "second" appear, these terms are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0038] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0039] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0040] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, 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 implementation method.

[0041] In the related art, some vacuum sealers can achieve reliable vacuuming and sealing effects for dry foods and items. However, for vacuum bags containing fresh meat with blood and water and other wet items, due to the high atmospheric pressure difference between the inside of the machine and the outside of the vacuum bag during and after the vacuuming process, some of the water or blood in the vacuum bag will continue to flow out of the plastic bag due to the compression of the atmospheric pressure. During the sealing stage, the heat at the mouth of the plastic bag will be continuously taken away, which will result in the inability to obtain a reliable sealing effect, causing the vacuum bag containing wet goods to leak after vacuuming and sealing, and the vacuum preservation will fail.

[0042] In addition, there is also a chamber vacuum machine that can reliably seal vacuum bags for wet goods. It has a relatively large vacuum chamber. The vacuum bag is filled with items and placed in the vacuum chamber. The vacuum chamber is then evacuated. After the evacuation is completed, the machine will jump to sealing the plastic bag. Since the vacuum bag is placed in the vacuum chamber during the entire process of vacuum sealing, there is no pressure difference between the inside and outside of the vacuum bag, so the blood and water in the wet goods will not flow out of the vacuum bag and take away the sealing heat. However, it is expensive, the machine is large, and the cost investment is too high, so it is not suitable for home use and other scenarios.

[0043] See also Figure 1 As shown, in order to improve the above problems, an embodiment of the present application provides a vacuum sealer 100, which can be used for vacuum sealing of a vacuum bag 200, and is specifically for vacuum sealing of a vacuum bag 200 containing wet goods.

[0044] Continue reading Figure 2 As shown, specifically, the vacuum sealer 100 includes a box body 110, a cover body 120, a vacuum assembly 130 and a negative pressure balance assembly 140. Among them, the cover body 120 can be controlled to cover or separate with the box body 110, so that the vacuum bag 200 is placed between the cover body 120 and the box body 110, and the subsequent pressing and vacuum sealing is performed. The vacuum assembly 130 is arranged in the box body 110, and can be vacuumed after the bag mouth of the vacuum bag 200 is placed in the vacuum sealer 100. The negative pressure balance assembly 140 is also installed in the box body 110, and after the vacuum bag 200 is vacuumed, it deflates into the box body 110, so that the air pressure inside and outside the vacuum bag 200 is balanced, so that the liquid in the vacuum bag 200 will not continue to flow out under high and low pressure conditions, which is convenient for subsequent heating and sealing.

[0045] In this specific embodiment, the cover 120 can be rotatably connected to one end of the box body 110, and the vacuum sealer 100 can be opened and closed by rotating the cover 120. The end of the cover 120 rotatably connected to the box body 110 is the first end, and the end opposite to the first end is the second end. One end of the cover 120 can be rotatably matched with the box body 110 through a structure such as a hinge or a pin, so that the cover 120 can be driven to rotate through the second end of the cover 120, so that the cover 120 can be opened relative to the box body 110 or the cover 120, the vacuum bag 200 can put the bag mouth between the cover 120 and the box body 110 in the open state of the cover 120, and be pressed and sealed when the cover 120 and the box body 110 are closed.

[0046] In other embodiments, the cover 120 can be separated from the box body 110 and distributed up and down, and the cover 120 located at the top can be separated from or covered with the box body 110 by an external driving member, thereby achieving vacuum sealing of the vacuum bag 200. Of course, the connection method between the cover 120 and the box body 110 is only an example, and is not limited to the above method. It is not specifically limited here, and it only needs to achieve the sealing operation of the vacuum bag 200.

[0047] Continue reading Figure 3 As shown, further, when the box body 110 and the cover body 120 are in the closed state, they can be sealed to define a water storage chamber 111. The water storage chamber 111 is located at the second end, so that during the vacuum sealing process of the vacuum bag 200, the bag opening of the vacuum bag 200 is at least partially placed in the water storage chamber 111.

[0048] Specifically, the vacuum assembly 130 is connected to the water storage chamber 111 and is used to extract the internal air of the water storage chamber 111 to form a vacuum environment and put the vacuum bag 200 in a compressed state. During the vacuuming process, when the air inside the vacuum bag 200 is completely sucked out, the moisture of the wet goods in the vacuum bag 200 is sucked to the bag opening. To this end, a negative pressure balance assembly 140 is provided to be connected to the water storage chamber 111. When the moisture of the wet goods in the vacuum bag 200 is sucked out and filled to the bag opening, the vacuum assembly 130 stops working, and the negative pressure balance assembly 140 releases air into the water storage chamber 111 until a negative pressure state of air pressure balance is formed inside and outside the vacuum bag 200. The wet goods liquid in the vacuum bag 200 will not move further, and the air will not flow back into the vacuum bag 200, thereby ensuring the subsequent heating and sealing operation temperature.

[0049] Exemplarily, a groove is formed in the box body 110, and the side of the groove facing the cover 120 is an open structure, so that when the cover 120 is covered with the box body 110, the groove is sealed to form a water storage chamber 111. Of course, the cover 120 can also be provided with a groove structure of the same size, and when it is covered with the box body 110, the two grooves are sealed to form the water storage chamber 111, which is not specifically limited here. In addition, during the vacuuming process, it is difficult to completely prevent some wet goods from flowing out of the bag opening, and the water storage chamber 111 can store liquid from the vacuum bag 200 to a certain extent.

[0050] Continue reading Figure 4 and Figure 5 As shown, further, the vacuum sealer 100 also includes a sealing assembly 150, which includes a heating element 151 and a pressing element 152. The heating element 151 and the pressing element 152 are respectively installed on the box body 110 and the cover body 120, and are located on the side of the water storage chamber 111 close to the opening of the vacuum sealer 100.

[0051] Specifically, the heating element 151 is installed on the box body 110, and the pressing element 152 is installed on the cover body 120, and in the closed state, the pressing element 152 is in contact with the heating element 151. The heating element 151 can heat and dissolve the bag opening material of the vacuum bag 200 by heat conduction or heat radiation, and press the bag opening material under the action of the pressing element 152. The heating element 151 and the pressing element 152 can both be long strip-shaped components, so that when the bag opening of the vacuum bag 200 is placed in the vacuum sealing machine 100, the heating element 151 and the pressing element 152 can completely cover the width range of the bag opening to ensure effective sealing of the bag opening.

[0052] Illustratively, during the vacuum sealing process, the bag opening of the vacuum bag 200 is sequentially passed through the heating element 151 and the water storage chamber 111. When the vacuum bag 200 reaches internal and external air pressure balance, the heating element 151 starts heating, and under the action of the pressing element 152, the bag opening of the vacuum bag 200 is sealed.

[0053] Furthermore, the vacuum sealer 100 further includes a handle, which is installed at the second end of the cover body 120 , so as to facilitate the user to exert force to open or close the cover body 120 .

[0054] In some embodiments, the vacuum assembly 130 includes an air pump 131 , and the water storage chamber 111 is provided with an air nozzle 112 , and the air nozzle 112 is connected to the air pump 131 through a pipeline.

[0055] Specifically, at least one air nozzle 112 is provided on the outside of the water storage chamber 111, and the air nozzle 112 is connected to the internal cavity of the water storage chamber 111, so that under the drive of the vacuum pump 131, the internal gas of the water storage chamber 111 is extracted through the air nozzle 112 and the pipeline, thereby making the vacuum bag 200 reach a vacuum state.

[0056] Of course, in other embodiments, the water storage chamber 111 may also be connected to an external vacuum system only through the air nozzle 112 , so that the interior thereof reaches a vacuum state, thereby simplifying the internal structure of the vacuum sealing machine 100 .

[0057] Furthermore, the vacuum pumping assembly 130 also includes an air release valve 132 , and a pipeline of the air release valve 132 is connected between the air pump 131 and the water storage chamber 111 .

[0058] Specifically, the air release valve 132 can be connected to the external environment in an open state, so that air is introduced into the water storage chamber 111. When the vacuum operation is performed, the air release valve 132 is closed, and external gas cannot enter the water storage chamber 111, and the air pump 131 performs the vacuum operation. When the vacuum sealing operation is completed, the air release valve 132 can be opened to release air into the water storage chamber 111, thereby increasing the air pressure in the water storage chamber 111, making it easier to open the cover body 120 and remove the sealed vacuum bag 200, so as to perform the sealing operation of the next vacuum bag 200.

[0059] Furthermore, the vacuum pumping assembly 130 further includes an air pressure sensor 133 , and the air pressure sensor 133 is connected to the water storage chamber 111 through a pipeline.

[0060] Specifically, the air pressure sensor 133 is installed in the box body 110 and communicated with the water storage chamber 111 through a pipeline, so that the air pressure strength in the water storage chamber 111 can be obtained to determine the vacuum negative pressure state in the water storage chamber 111. During the vacuuming process, the vacuum negative pressure setting value of the air pressure sensor 133 can be preset. When the air pressure sensor 133 determines that the setting value is reached, the air in the vacuum bag 200 is completely extracted, and the blood or water in the bag is squeezed out by the atmospheric pressure outside the bag until the bag mouth is filled. The vacuum pump 131 immediately stops vacuuming to prevent the vacuum pump 131 from continuously vacuuming to extract the liquid in the wet goods.

[0061] In some embodiments, the negative pressure balance component 140 includes an air bag 141 and a control valve 142 , and the control valve 142 is connected to the water storage chamber 111 and the air bag 141 pipeline respectively.

[0062] Specifically, the control valve 142 can control the discharge of gas inside the airbag 141 . When the vacuum pump 131 performs a vacuum operation, gas is stored in the airbag 141 , and the control valve 142 is in a closed state to limit the discharge of gas inside the airbag 141 .

[0063] When the vacuuming is completed, the continuous low pressure in the water storage chamber 111 will cause the liquid in the wet goods to be drawn out of the vacuum bag 200. Therefore, the control valve 142 is opened at this time, and the air bag 141 is connected to the water storage chamber 111 in a low-pressure state. Therefore, the relatively high pressure gas inside is discharged into the water storage chamber 111 through the pipeline under the action of the pressure difference. At this time, the part of the bag opening of the vacuum bag 200 located at the sealing component 150 is pressed and sealed, and the liquid cannot flow back to the vacuum bag 200. In addition, the liquid at the bag opening also has a certain gas sealing effect to prevent the gas in the water storage chamber 111 from entering the vacuum bag 200.

[0064] During the deflation process, the gas in the airbag 141 is filled into the water storage chamber 111, thereby forming a relatively low negative pressure state in the water storage chamber 111, so that the liquid in the vacuum bag 200 will not be continuously extracted. When the negative pressure balance is reached, the liquid remains at the bag opening of the vacuum bag 200, and isolates the wet goods inside the vacuum bag 200 from the gas in the water storage chamber 111, so that the gas will not flow back into the vacuum bag 200. In this way, the liquid in the vacuum bag 200 will not flow, neither will it flow out of the bag opening to take away the subsequent sealing heat, nor will it return to the vacuum bag 200 to prevent the air from entering the vacuum bag 200 due to the failure of the sealing. Finally, the vacuum sealer 100 starts the sealing heating operation, and because the sealing heat will not be continuously taken away, the sealing of the vacuum bag 200 will be able to be completed more stably.

[0065] It is understandable that the vacuum sealer 100 should also include a control center to obtain the sensing value of the air pressure sensor 133, and control the start of the electronic components such as the vacuum pump 131, the control valve 142, and the air release valve 132 according to the set value to achieve automatic control of each component. The above is a conventional electronic control principle, which will not be described in detail in this application.

[0066] Continue reading Figure 6 As shown, in other embodiments, the negative pressure balance assembly 140 includes a sleeve 143, a piston 144 and an elastic member 145, one end of the sleeve 143 is connected to the pipeline of the water storage chamber 111, the piston 144 is slidably inserted into the sleeve 143, the elastic member 145 is arranged in the sleeve 143, and the two ends are respectively connected to the piston 144 and the sleeve 143.

[0067] Exemplarily, the airbag 141 structure in the above embodiment is replaced by a sleeve 143 piston 144 structure, and the elastic member 145 is a thrust spring. The elastic member 145 is arranged at one end of the sleeve 143 connected to the water storage chamber 111, and an opening 146 is arranged at one end of the sleeve 143 away from the elastic member 145. In this way, when the sleeve 143 is not connected to the water storage chamber 111, the piston 144 moves to the side of the opening 146 under the thrust of the elastic member 145, and gas is stored in the sleeve 143. When the water storage chamber 111 is replenished with gas, since the opening 146 is connected to the external air pressure, the side of the sleeve 143 close to the water storage chamber 111 is in a negative pressure state. Under the action of the pressure difference, the piston 144 moves to the gas outlet side, and the gas in the sleeve 143 is discharged into the water storage chamber 111. When the gas replenishment is completed, the piston 144 is reset under the action of the elastic member 145, and the sleeve 143 stores gas. In this embodiment, the negative pressure balance component 140 may also include a control valve 142 to control the discharge of the gas inside the sleeve 143, and the specific principle will not be repeated.

[0068] In some other embodiments, the negative pressure balancing assembly 140 includes a pressure limiting valve, which is connected to the water storage chamber 111 and can release air into the water storage chamber 111 .

[0069] For example, by setting a pressure limiting valve, the airbag 141 and the sleeve 143 piston 144 structure in the above embodiment can be replaced to achieve a simplified structure of the vacuum sealer 100. The pressure limiting valve can be connected to the external environment, so that when it is necessary to replenish air to the water storage chamber 111, the pressure limiting valve opens, and the gas replenishment amount of the pressure limiting valve is limited by the set value, so that the inside of the water storage chamber 111 reaches a set negative pressure value.

[0070] In some embodiments, the vacuum sealer 100 further includes a clamping assembly 160 , which includes two pressing rings 161 arranged opposite to each other. The two pressing rings 161 are respectively installed on the box body 110 and the cover body 120 , and are arranged around the water storage chamber 111 .

[0071] Specifically, the pressing ring 161 is protruding compared to the end surfaces of the box body 110 and the cover body 120, so that after the bag opening of the vacuum bag 200 is placed in the water storage chamber 111, the pressing ring 161 presses the bag opening of the vacuum bag 200. When the water storage chamber 111 is replenished with air, the pressing ring 161 presses the bag opening of the vacuum bag 200, and in a low negative pressure state, the liquid is restricted from flowing back into the vacuum bag 200, so as to maintain the air pressure balance at the bag opening.

[0072] See also Figure 7 As shown, the embodiment of the present application further provides a sealing method, which is applied to the vacuum sealing machine 100 in any of the above embodiments.

[0073] Specifically, the sealing methods include:

[0074] S10 , placing the opening of the vacuum bag 200 containing wet goods into the opening side of the vacuum sealer 100 , and making the opening of the vacuum bag 200 at least partially located in the water storage chamber 111 .

[0075] Exemplarily, the cover 120 is opened so that the cover 120 and the box body 110 are fully opened or at a certain angle, and the mouth of the vacuum bag 200 containing wet goods to be sealed is placed at the opening between the cover 120 and the box body 110, and at least part of the bag mouth is located in the water storage chamber 111, so as to facilitate the subsequent vacuum treatment.

[0076] S20, closing the cover body 120, controlling the vacuum assembly 130 to extract the internal air connected to the water storage chamber 111, until the internal liquid of the vacuum bag 200 fills the bag opening.

[0077] For example, after the vacuum bag 200 is placed, the cover 120 is closed to seal the water storage chamber 111, thereby facilitating the extraction of air from the vacuum bag 200. The deflation valve 132 is closed, and the air pump 131 is started to extract the gas from the vacuum bag 200 and the water storage chamber 111 until the air pressure sensor 133 determines that the air pressure inside the water storage chamber 111 reaches a preset value, and the air pump 131 stops. At this time, the air in the vacuum bag 200 is extracted to reach a vacuum state, and part of the liquid in the cargo is extracted and filled at the bag opening.

[0078] S30, controlling the negative pressure balance component 140 to release air into the water storage chamber 111 until the internal and external air pressures of the vacuum bag 200 reach an air pressure balance.

[0079] Exemplarily, after the vacuum pump 131 stops, the control valve 142 opens, and the internal gas of the airbag 141 enters the water storage chamber 111 under the action of the pressure difference. Under the action of the pressing ring 161, the liquid cannot flow back into the vacuum bag 200, and only the air pressure balance is maintained at the bag opening, and the gas is prevented from entering the vacuum bag 200 under the air sealing effect of the liquid. The liquid in the vacuum bag 200 will not flow, neither will it flow out of the bag opening to take away the subsequent sealing heat, nor will it return to the vacuum bag 200 to prevent the air from entering the vacuum bag 200 due to air sealing failure.

[0080] S40, after the vacuum sealer 100 performs the heating and sealing operation, the sealed vacuum bag 200 is taken out.

[0081] Exemplarily, the sealing assembly 150 is heated, the bag material of the vacuum bag 200 is heated and dissolved, and is pressed together under the action of the pressing member 152. Because there is no continuous flow of liquid during the sealing process, the heat will not be taken away, and the sealing of the vacuum bag 200 can be completed stably. After the sealing is completed, the air release valve 132 is opened to restore the initial air pressure in the airbag 141 and the water storage chamber 111, which facilitates the opening of the cover body 120. After taking out the sealed vacuum bag 200, the vacuum sealing operation of the next vacuum bag 200 is carried out.

[0082] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0083] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A vacuum sealing machine, characterized in that: include: Box body; A cover body, which can be controlled to cover or separate from the box body, and is closed with the box body to define a sealed water storage cavity; A vacuum pumping assembly connected to the water storage chamber and used to extract the internal air of the water storage chamber to form a vacuum environment; A negative pressure balancing component is connected to the water storage chamber to transport gas to the water storage chamber in a vacuum state so that the water storage chamber reaches a set negative pressure state.

2. The vacuum sealer according to claim 1, characterized in that: The vacuum sealer further comprises a heating element and a pressing element, wherein the heating element and the pressing element are respectively mounted on the box body and the cover body and are located on a side of the water storage cavity close to the opening of the vacuum sealer.

3. The vacuum sealer according to claim 1, characterized in that The vacuum pump assembly includes an air pump, and the water storage chamber is provided with an air nozzle, which is connected to the air pump pipeline.

4. The vacuum sealer according to claim 3, characterized in that: The negative pressure balance component includes an air bag and a control valve, and the control valve is connected to the water storage chamber and the air bag pipeline respectively.

5. The vacuum sealer according to claim 3, characterized in that: The vacuum pump assembly also includes an air release valve, and a pipeline of the air release valve is connected between the air pump and the water storage chamber.

6. The vacuum sealer according to claim 3, characterized in that: The vacuum pumping assembly also includes an air pressure sensor, and the air pressure sensor is connected to the water storage chamber pipeline.

7. The vacuum sealer according to claim 3, characterized in that: The negative pressure balance component includes a sleeve, a piston and an elastic member. One end of the sleeve is connected to the water storage chamber pipeline, the piston is slidably inserted into the sleeve, and the elastic member is arranged in the sleeve, and two ends are respectively connected to the piston and the sleeve.

8. The vacuum sealer according to any one of claims 1 to 7, characterized in that The negative pressure balancing component includes a pressure limiting valve, which is communicated with the water storage chamber and can release air into the water storage chamber.

9. The vacuum sealer according to any one of claims 1 to 7, characterized in that: The vacuum sealer further comprises a pressing assembly, which comprises two pressing rings arranged opposite to each other. The two pressing rings are respectively mounted on the box body and the cover body, and are arranged on the peripheral side of the water storage cavity.

10. A sealing method, characterized in that: The vacuum sealer according to any one of claims 1 to 9, wherein the sealing method comprises: Putting the opening of a vacuum bag containing wet goods into the opening side of the vacuum sealer, and making the opening of the vacuum bag at least partially located in the water storage cavity; Closing the cover body, controlling the vacuum assembly to extract the internal air connected to the water storage chamber until the internal liquid of the vacuum bag fills the bag opening; Controlling the negative pressure balance component to release air into the water storage chamber until the air pressure inside and outside the vacuum bag reaches air pressure balance; After the vacuum sealer performs the heating and sealing operation, the sealed vacuum bag is taken out.

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