Sealing machine control method, controller and sealing machine suitable for wet bag vacuumizing

Abstract

The application relates to a vacuumizing method, controller and sealing machine suitable for dry and wet bags, wherein the steps of the wet bag vacuumizing sealing machine control method include: after receiving a working main instruction, issuing a vacuumizing instruction to a vacuum pump for vacuumizing a sealing cavity; after receiving information that the sealing cavity is in a first negative pressure state, issuing a pause instruction to the vacuum pump and a first opening instruction to a solenoid valve for feeding air to the sealing cavity; after receiving information that the sealing cavity is in a second negative pressure state, issuing a closing instruction to the solenoid valve and a heating instruction to a heating assembly for heat-sealing a rubber bag opening; after S seconds of issuing the heating instruction to the heating assembly, issuing a stop instruction to the heating assembly and a second opening instruction to the solenoid valve; and after receiving information that the sealing cavity is in a normal pressure state, issuing a closing instruction to the solenoid valve. The solenoid valve is opened for a short time before the heating assembly seals, so that liquid in the rubber bag opening flows back, thereby improving the sealing effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vacuum sealing, in particular to a sealing machine control method suitable for wet bag vacuumizing, and further relates to a controller and a sealing machine. BACKGROUND

[0002] Wet bag refers to a plastic bag containing fresh meat and other wet-state objects with blood and water. When the wet bag is vacuumized, part of the liquid will be extracted from the plastic bag. After the wet bag is vacuumized, the plastic bag mouth is heat sealed. The inventor found the following problems when using the existing sealing machine to seal the wet bag.

[0003] During the vacuumizing process, the liquid in the plastic bag inevitably flows into the sealing machine from the plastic bag mouth. After the vacuum pump stops pumping, the liquid that fails to flow out will be retained at the corresponding position. At this time, liquid will be retained at the plastic bag mouth. Especially when wet-state objects with blood and water are vacuumized, the liquid of such wet-state objects is less, and the liquid extracted from the plastic bag mouth is a stream of water flowing outward. The liquid retained at the plastic bag mouth is also prone to uneven distribution. When the plastic bag mouth is heat sealed, the position where the liquid is retained on the plastic bag mouth needs to absorb more heat. At the same time, the heat released by the heating wire is uniform, which easily leads to the fact that the part of the plastic bag mouth without liquid has completed sealing, while the part of the plastic bag mouth with liquid fails to complete sealing, and air leakage due to unreliable sealing of the plastic bag mouth is prone to occur. If the heat sealing time of the sealing machine is prolonged, the local overheating of the plastic bag mouth will cause the problem of melting. SUMMARY

[0004] Therefore, it is necessary to provide a sealing machine control method suitable for wet bag vacuumizing, a controller and a sealing machine in view of the problem of unreliable sealing of the wet bag.

[0005] In a first aspect, the present application provides a sealing machine control method suitable for wet bag vacuumizing, and the steps of the method include:

[0006] After receiving the working main instruction, an air pumping instruction is sent to a vacuum pump for pumping the sealing cavity;

[0007] After receiving the information that the sealing cavity is in the first negative pressure state, a pause instruction is sent to the vacuum pump, and a first opening instruction is sent to an electromagnetic valve for supplying air to the sealing cavity;

[0008] After receiving the information that the sealing cavity is in the second negative pressure state, a closing instruction is sent to the electromagnetic valve, and a heating instruction is sent to a heating assembly for heat sealing the plastic bag mouth;

[0009] After the heating instruction is sent to the heating assembly for S seconds, a stop instruction is sent to the heating assembly, and a second opening instruction is sent to the electromagnetic valve;

[0010] Upon receiving the information that the sealed cavity is in the normal pressure state, a closing instruction is sent to the electromagnetic valve.

[0011] In one embodiment, upon receiving the information that the sealed cavity is in the first negative pressure state, the method further comprises the steps of:

[0012] Upon detecting that the air pressure in the sealed cavity drops to E1, the pressure sensing component sends information that the sealed cavity is in the first negative pressure state.

[0013] In one embodiment, upon receiving the information that the sealed cavity is in the second negative pressure state, the method further comprises the steps of:

[0014] Upon detecting that the air pressure in the sealed cavity reaches E2, the pressure sensing component sends information that the sealed cavity is in the second negative pressure state.

[0015] In one embodiment, E1 is lower than E2.

[0016] In one embodiment, receiving the information that the sealed cavity is in the second negative pressure state comprises:

[0017] After X seconds after sending the first opening instruction to the electromagnetic valve, it is determined that the information that the sealed cavity is in the second negative pressure state is received.

[0018] In one embodiment, X is 0.1s-1s.

[0019] In one embodiment, sending the heating instruction to the heating component comprises:

[0020] Sending the heating instruction to the first heating wire in the heating component;

[0021] After the first heating wire is heated for S1 seconds, a stop instruction is sent to the first heating wire, and a heating instruction is sent to the second heating wire in the heating component.

[0022] In one embodiment, sending the heating instruction to the heating component comprises intermittently sending the heating instruction to the heating component.

[0023] After S3 seconds after sending the heating instruction to the heating component, a stop instruction is sent to the heating component, and after S4 seconds, the heating instruction is sent to the heating component again.

[0024] In a second aspect, the present application provides a controller, which stores a computer program. When the computer program is executed by a processor, the steps of the method in the above embodiments are realized.

[0025] In one embodiment, the processor executing the computer program is further capable of implementing the steps of a method for controlling a dry bag vacuum sealing machine, the steps of the method comprising:

[0026] Upon receiving the work master instruction, issuing a pumping instruction to the vacuum pump;

[0027] Upon receiving the information that the sealing cavity is in the third negative pressure state, issuing a pause instruction to the vacuum pump and a heating instruction to the heating assembly;

[0028] S seconds after issuing the heating instruction to the heating assembly, issuing a stop instruction to the heating assembly and an open instruction to the electromagnetic valve;

[0029] Upon receiving the information that the sealing cavity is in the normal pressure state, issuing a close instruction to the electromagnetic valve.

[0030] In one embodiment, before the step of, upon receiving the information that the sealing cavity is in the third negative pressure state, issuing a pause instruction to the vacuum pump and a heating instruction to the heating assembly, the method further comprises the step of:

[0031] Upon detecting that the air pressure in the sealing cavity drops to E3, issuing information that the sealing cavity is in the third negative pressure state by the pressure sensing assembly.

[0032] In one embodiment, receiving the information that the sealing cavity is in the third negative pressure state comprises:

[0033] Receiving the first negative pressure state information;

[0034] After delaying for M seconds, determining that the sealing cavity is in the third negative pressure state.

[0035] In a third aspect, the present application provides a household sealing machine, comprising:

[0036] A machine base, the machine base being provided with a heating assembly and a lower sealing ring;

[0037] A machine cover, the machine cover being provided with a hot pressing piece and an upper sealing ring;

[0038] Internal functional components, the internal functional components comprising an electromagnetic valve and a vacuum pump; and

[0039] A controller as in the above embodiments, the controller being electrically connected to the heating assembly, the electromagnetic valve and the vacuum pump respectively;

[0040] When the machine base and the machine cover are folded together, the lower sealing ring and the upper sealing ring are fitted in the machine base and the machine cover to form a sealing cavity, and the electromagnetic valve and the vacuum pump are connected to the sealing cavity.

[0041] In one embodiment, the internal functional components further comprise a pressure sensing assembly for detecting the air pressure in the sealing cavity, and the controller is electrically connected to the pressure sensing assembly.

[0042] The pressure information in the sealed cavity is sent to the controller by the pressure sensing assembly.

[0043] In one embodiment, the controller comprises a delay module, which is used to delay for M seconds after receiving the pressure information in the sealed cavity, and then sends a pause instruction to the vacuum pump.

[0044] In one embodiment, the internal functional components further comprise a gas pipe assembly, through which the electromagnetic valve, the vacuum pump and the pressure sensing assembly are connected to the sealed cavity.

[0045] In one embodiment, the gas pipe assembly comprises a main gas pipe and a joint, the electromagnetic valve, the vacuum pump and the pressure sensing assembly are connected to the joint through branch gas pipes respectively, one end of the main gas pipe is connected to the joint, and the other end extends into the sealed cavity.

[0046] The sealing machine control method, the controller and the sealing machine suitable for wet bag vacuumizing in the above embodiments can make the sealed cavity return to the second negative pressure state from the first negative pressure state by supplementing gas in the sealed cavity through the electromagnetic valve, the increase of the air pressure makes part of the sealed cavity flow back to the rubber bag port to drive the residual liquid in the rubber bag port to flow back to the rubber bag, thereby removing the liquid at the rubber bag port to avoid the liquid absorbing heat to affect the sealing effect, and improving the reliability of the sealing.

[0047] The sealing machine control method for wet bag vacuumizing and the sealing machine control method for dry bag vacuumizing are configured in the controller at the same time, so that the sealing machine is convenient for sealing wet bags and dry bags, and the application environment of the sealing machine is improved. The sealing machine can not only improve the reliability and applicability of the sealing, but also does not need to increase additional accessories in the sealing machine, which is convenient for improving the existing sealing machine and improves the applicability. BRIEF DESCRIPTION OF DRAWINGS

[0048] Figure 1 A perspective structural schematic view of the sealing machine when being folded is provided for an embodiment of the present application;

[0049] Figure 2 A perspective structural schematic view of the sealing machine when being unfolded is provided for an embodiment of the present application;

[0050] Figure 3 A Figure 2 A partial enlarged view of position A in FIG. 8;

[0051] Figure 4 A sectional view of the partial structure of the sealing machine is provided for another embodiment of the present application;

[0052] Figure 5 A perspective view of the internal functional components of the sealing machine is provided for another embodiment of the present application;

[0053] Figure 6 The control method steps diagram of the controller provided by an embodiment of the present application;

[0054] Figure 7 The method steps diagram of the vacuumizing of the sealing machine's dry bag provided by another embodiment of the present application.

[0055] Reference signs:

[0056] 100, machine base;

[0057] 11, heating assembly; 12, lower sealing ring; 13, air pipe assembly; 14, electromagnetic valve; 15, vacuum pump; 16, pressure sensing assembly;

[0058] 111, heating wire;

[0059] 131, main air passage; 132, joint; 133, branch air passage; 134, air nozzle;

[0060] 200, machine cover;

[0061] 21, hot pressing piece; 22, upper sealing ring;

[0062] 300, sealing cavity;

[0063] 31, lower sealing cavity; 32, upper sealing cavity;

[0064] 400, vacuumizing piece;

[0065] 41, rubber bag; 42, material;

[0066] 411, rubber bag opening; 412, bag body;

[0067] 500, controller. DETAILED DESCRIPTION

[0068] In order to make the above objectives, features and advantages of the present application more apparent, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, a lot of specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many different ways other than the ways described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0069] In the description of the application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0070] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0071] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0072] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0073] It is to be noted that when an element is referred to as being "fixed" or "set" on another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions used herein are for illustrative purposes only and are not intended to be limiting.

[0074] Referring to Figure 1 , 2 , Figure 1 A perspective view of the sealing machine in the folded state is provided for some embodiments of the present application, Figure 2 A perspective view of the sealing machine in the unfolded state is provided for some embodiments of the present application. In some embodiments of the present application, a sealing machine is provided, which includes a housing and internal functional components, and the internal functional components are accommodated in the housing. The housing includes a base 100 and a cover 200, and the base 100 and the cover 200 are pivotally arranged. The base 100 includes oppositely arranged first and second ends, and the cover 200 is connected to the first end of the base 100. The cover 200 can rotate relative to the base 100, so that the base 100 and the cover 200 are folded or unfolded relative to each other. A first mounting groove is formed on the upper surface of the base 100, and a lower sealing ring 12 in the form of a ring is embedded in the first mounting groove. The inside of the lower sealing ring 12 and the groove bottom of the first mounting groove together form a lower sealing cavity 31. A second mounting groove is also formed on the upper surface of the base 100, and a heating assembly 11 as an internal functional component is embedded in the second mounting groove. The second mounting groove is located between the first mounting groove and the second end, and the second mounting groove is arranged close to the first mounting groove.

[0075] In addition, a hot pressing piece 21 and an upper sealing ring 22 are mounted on the cover 200. The hot pressing piece 21 is arranged corresponding to the heating assembly 11, and the upper sealing ring 22 is arranged corresponding to the lower sealing cavity 31. An upper sealing cavity 32 is formed in the upper sealing ring 22.

[0076] Further, referring to Figure 3 , Figure 3 A partial enlarged view of position A in Figure 2 The heating assembly 11 includes a plurality of heating wires 111, which can seal the bag opening 411 by heating. For example, the heating wire 111 includes a first heating body and a second heating body, which are arranged in parallel, so that the sealing lines remain parallel, and two sealing lines can also ensure the sealing quality, so that the sealing performance is better.

[0077] Referring to Figure 4 As shown, Figure 4The sectional view of the partial structure of the sealing machine is provided for some embodiments of the present application. When the base 100 and the cover 200 are folded, the upper sealing ring 22 is attached to the lower sealing ring 12, so that the lower sealing cavity 31 and the upper sealing cavity 32 are communicated to form a closed sealing cavity 300, and the upper sealing ring 22 and the lower sealing ring 12 clamp the bag opening 411. At the same time, the hot pressing piece 21 is pressed on the heating assembly 11. During the heat sealing process, the opening of the bag 41 is located in the sealing cavity 300, and the hot pressing piece 21 and the heating assembly 11 clamp the bag opening 411, and the heating assembly 11 is heated to seal the bag 41. By cooperating the lower sealing ring 12 and the upper sealing ring 22 and the heating assembly 11 and the hot pressing piece 21 to clamp the bag opening 411 at two different positions, the position of the bag 41 is fixed when the base 100 and the cover 200 are folded, and the bag 41 is prevented from deviating during the heat sealing process, which affects the appearance and sealing effect of the sealing.

[0078] Reference Figure 5 , Figure 5 The three-dimensional schematic view of the internal functional components of the sealing machine is provided for some embodiments of the present application. The base 100 is internally provided with the internal functional components, which include the air pipe assembly 13, the electromagnetic valve 14, the vacuum pump 15 and the pressure sensing assembly 16, and the air pipe assembly 13 connects the electromagnetic valve 14, the vacuum pump 15 and the pressure sensing assembly 16 in communication. Among them, the vacuum pump 15 is used to perform the vacuumizing action in the sealing cavity 300. The electromagnetic valve 14 is used to supplement the gas in the sealing cavity 300. The pressure sensing assembly 16 can detect the air pressure in the sealing cavity 300.

[0079] Further, the air pipe assembly 13 includes the main air passage 131 and the joint 132. The electromagnetic valve 14, the vacuum pump 15 and the pressure sensing assembly 16 are connected to the joint 132 through the branch air passage 133, one end of the main air passage 131 is connected to the joint 132, and the other end extends into the sealing cavity 300. The electromagnetic valve 14, the vacuum pump 15 and the pressure sensing assembly 16 are connected to the sealing cavity 300 through the air pipe assembly 13, and since the branch air passage 133, the joint 132 and the main air passage 131 are connected to the sealing cavity 300, the air pressure of the branch air passage 133, the joint 132 and the main air passage 131 is consistent with that of the sealing cavity 300, so the air pressure detected by the pressure sensing assembly 16 in the branch air passage 133 is equal to the air pressure of the sealing cavity 300.

[0080] Specifically, one end of the main air passage 131 extends into the sealing cavity 300 from the bottom of the lower sealing cavity 31, and an air nozzle 134 is provided on the end face of the main air passage 131 extending into the sealing cavity 300. Gas is drawn in by the vacuum pump 15 to reduce the air pressure between the air tube assembly 13 and the sealing cavity 300. Since the air pressure in the sealing cavity 300 is less than atmospheric pressure, the gas and liquid in the plastic bag 41 are forced out. The solenoid valve 14 includes two vents, one of which is connected to the external atmosphere, and the other is connected to the branch air passage 133. The vent on the solenoid valve 14 connected to the external atmosphere is normally closed. The normally closed state keeps the vent isolated from the external environment, and when the vent is opened, it can replenish gas into the sealing cavity 300, thereby increasing the air pressure in the sealing cavity 300.

[0081] During the vacuuming process, the liquid inside the plastic bag 41 will inevitably be drawn into the sealed cavity 300 and remain in the lower sealed cavity 31 due to its own weight. When the vacuum pump 15 extracts gas from the sealed cavity 300, the liquid will be drawn into the air pipe assembly 13, affecting the normal operation of the vacuum pump 15. The air nozzle 134 is always located in the upper sealed cavity 32, and the position of the air nozzle 134 is not lower than the upper surface of the lower sealing ring 12. For example, as shown... Figure 3 As shown, the main air passage 131, which extends into the lower sealing cavity 31, protrudes from the upper surface of the lower sealing ring 12, allowing the nozzle 134 to be positioned higher than the upper surface of the lower sealing ring 12. Liquid drawn into the sealing cavity 300 is contained within the lower sealing cavity 31 due to gravity. When the nozzle 134 is positioned higher than the upper surface of the lower sealing ring 12, it effectively prevents liquid contained in the lower sealing cavity 31 from entering the main air passage 131 through the nozzle 134.

[0082] like Figure 5 As shown, in some embodiments of this application, the sealing machine further includes a controller 500, a solenoid valve 14, a vacuum pump 15 and a pressure sensing component 16 electrically connected to the controller 500, and a heating component 11 also electrically connected to the controller 500. The controller 500 controls the heating component 11, the solenoid valve 14 and the vacuum pump 15 to work together in order to realize the vacuuming action of the sealing machine.

[0083] Furthermore, the controller 500 is electrically connected to several heating wires 111, so that the heating wires 111 can work independently under the control of the controller 500.

[0084] In one embodiment, there is one heating wire 111; the controller 500 controls the heating wire 111 to perform the heating action. Specifically, the controller 500 controls the heating wire 111 to work intermittently. The heating wire 111 works for a period of time, then stops, then resumes working after a certain period of time, and so on, repeating several cycles. By working intermittently, the heating wire 111 is cooled down during the pauses, preventing overheating of the plastic bag opening 411 and causing it to melt.

[0085] In another embodiment, the number of heating wires 111 is two. The controller 500 controls the first heating body and the second heating body at the same time. The controller 500 controls the two heating wires 111 to perform the heating action alternately by sending working instructions to the two heating wires 111 alternately, so that the two heating wires 111 perform the heating action alternately, avoiding the local overheating of the bag opening 411 caused by a single heating body, and the alternately heating also improves the sealing efficiency.

[0086] In some embodiments of the present application, the controller 500 includes a memory and a processor, and the memory stores a computer program. The processor executes the computer program to realize the wet bag vacuumizing and the dry bag vacuumizing. The sealing machine can vacuumize the wet bag and the dry bag, so as to improve the application environment of the sealing machine.

[0087] In some embodiments of the present application, the controller 500 includes a memory and a processor, and the memory stores a computer program. The processor executes the computer program to realize the wet bag vacuumizing and the dry bag vacuumizing. The sealing machine can vacuumize the wet bag and the dry bag, so as to improve the application environment of the sealing machine. Figure 6 , Figure 6 The controller control method steps provided by some embodiments of the present application are shown in the figure. The processor executes the computer program to realize the steps of the sealing machine control method for wet bag vacuumizing. The steps of the method include:

[0088] After receiving the first working main instruction, the vacuum pump 15 for vacuumizing the sealing cavity 300 is sent a gas extraction instruction;

[0089] After receiving the information that the sealing cavity 300 is in the first negative pressure state, the vacuum pump 15 is sent a pause instruction, and the electromagnetic valve 14 for supplying air to the sealing cavity 300 is sent a first opening instruction;

[0090] After receiving the information that the sealing cavity 300 is in the second negative pressure state, the electromagnetic valve 14 is sent a closing instruction, and the heating assembly 11 for heat sealing the bag opening 411 is sent a heating instruction;

[0091] After sending the heating instruction to the heating assembly 11 for S seconds, the heating assembly 11 is sent a stop instruction, and the electromagnetic valve 14 is sent a second opening instruction;

[0092] After receiving the information that the sealing cavity 300 is in the normal pressure state, the electromagnetic valve 14 is sent a closing instruction;

[0093] Termination of work waits for the working main instruction, and feedback information.

[0094] Before the heating assembly 11 works, the electromagnetic valve 14 is controlled to send air into the sealed cavity 300 to make the air pressure in the sealed cavity 300 recover, and after the air pressure in the sealed cavity 300 recovers, part of the air will be forced into the rubber bag 41, the air entering the rubber bag port 411 will drive the liquid remaining in the rubber bag port 411 back into the bag body 412, so that the position of the liquid originally remaining in the rubber bag port 411 is filled with air to achieve the purpose of removing the liquid in the rubber bag port 411. And with the removal of the liquid remaining in the rubber bag port 411, the heating assembly 11 can avoid the influence of liquid absorbing heat on the sealing effect when sealing again, thereby improving the reliability of sealing. At the same time, in the scheme, the controller 500 controls the electromagnetic valve 14 to open and close twice to remove the liquid remaining in the rubber bag port 411, and no new structure is added to the sealing machine, and the existing sealing machine can be improved at a lower cost to improve the reliability of heat sealing wet bags, and the method has high applicability.

[0095] Wherein, the normal air pressure state is that the air pressure value of the sealed cavity 300 is equal to or approximately equal to the external atmospheric pressure, since the sealed cavity 300 is in a negative pressure state during the working process, a large force is required to separate the base 100 from the cover 200, in order to facilitate the subsequent removal of the rubber bag after heat sealing, the air pressure value of the sealed cavity 300 needs to be adjusted to be equal to or approximately equal to the external atmospheric pressure, so that the operator can separate the base 100 from the cover 200 with smaller force, which is convenient for the operator to use.

[0096] Further, the information that the sealed cavity 300 is in the first negative pressure state is sent by the pressure sensing assembly 16 after detection. When the pressure sensing assembly 16 detects that the air pressure in the sealed cavity 300 drops to E1, the pressure sensing assembly 16 sends the information that the sealed cavity 300 is in the first negative pressure state.

[0097] In an embodiment, the pressure sensing assembly 16 can also detect whether the sealed cavity 300 is in a second negative pressure state. The information that the sealed cavity 300 is in the second negative pressure state is sent by the pressure sensing assembly 16. When the pressure sensing assembly 16 detects that the air pressure in the sealed cavity 300 reaches E2, the pressure sensing assembly 16 sends the information that the sealed cavity 300 is in the second negative pressure state. Wherein, E1 is lower than E2.

[0098] It should be pointed out that in a specific scheme, the pressure sensing assembly 16 can be selected as a pressure sensing switch, which can detect a fixed air pressure value. In order to ensure the detection of two different air pressure values E1 and E2, the pressure sensing assembly 16 includes at least two pressure sensing switches, which respectively monitor different air pressure values, and the pressure sensing switches are controlled by the controller 500 to work cooperatively, so as to realize the steps in the above method.

[0099] In another embodiment, the information that the sealed cavity 300 is in the second negative pressure state is received after X seconds after the first opening instruction is sent to the electromagnetic valve 14. The amount of gas entering the sealed cavity 300 is controlled by controlling the opening time of the electromagnetic valve 14. Since the sectional area of the air vent hole of the electromagnetic valve 14 is fixed, the amount of gas entering the sealed cavity 300 can be accurately controlled by controlling the opening time of the electromagnetic valve 14. Specifically, the electromagnetic valve 14 needs to be closed after a short X seconds after the first opening instruction is sent to the electromagnetic valve 14. In order to ensure the vacuum quality of the rubber bag 41, it is necessary to return as little gas as possible into the bag body 412, so in this scheme, X is in the range of 0.1s-1s. Preferably, X is selected as 0.1s, 0.2s, 0.3s, 0.4s, 0.5s, 0.6s, so that the electromagnetic valve 14 can be accurately closed after an interval of X seconds, avoiding the opening time increasing and more gas being pressed into the rubber bag 41. At the same time, by time control, the work of the pressure sensing assembly 16 can be simplified, thereby avoiding failure.

[0100] In some embodiments of the present application, another computer program is also stored in the controller 500, and the processor executing the computer program can also implement the steps of the sealing machine control method for dry bag vacuumizing, and the steps of the method include:

[0101] After receiving the second main working instruction, sending a gas suction instruction to the vacuum pump 15 for vacuumizing the sealed cavity 300;

[0102] After receiving the information that the sealed cavity 300 is in the third negative pressure state, sending a pause instruction to the vacuum pump 15 and sending a heating instruction to the heating assembly 11 for heat sealing the rubber bag port 411;

[0103] After sending the heating instruction to the heating assembly 11 for S seconds, sending a stop instruction to the heating assembly 11 and sending an opening instruction to the electromagnetic valve 14;

[0104] After receiving the information that the sealed cavity 300 is in the normal pressure state, sending a closing instruction to the electromagnetic valve 14;

[0105] Terminating the work and waiting for the main working instruction, and feeding back the information.

[0106] In an embodiment, after receiving the information that the sealed cavity 300 is in the third negative pressure state includes: the information that the sealed cavity 300 is in the third negative pressure state is sent after the pressure sensing assembly 16 detects it. When the pressure sensing assembly 16 detects that the air pressure in the sealed cavity 300 drops to E3, the pressure sensing assembly 16 sends the information that the sealed cavity 300 is in the third negative pressure state.

[0107] In another embodiment, the controller 500 is provided with a delay module, after receiving the information that the sealed cavity 300 is in the first negative pressure state, delaying M seconds to send a pause instruction to the vacuum pump 15; or delaying M1 seconds to receive the information that the sealed cavity 300 is in the first negative pressure state, after receiving the information that the sealed cavity 300 is in the first negative pressure state, sending a pause instruction to the vacuum pump 15; or delaying M2 seconds to receive the information that the sealed cavity 300 is in the first negative pressure state, after receiving the information that the sealed cavity 300 is in the first negative pressure state, delaying M2 seconds to send a pause instruction to the vacuum pump 15. The time for the vacuum pump 15 to stop working is delayed through the delay module, so as to extract more gas in the sealed cavity 300, so that E3 is lower than E1. In order to ensure the vacuum extraction effect, the negative pressure strength of the sealed cavity 300 needs to be increased due to the absence of liquid in the dry bag. Through the delay module, the vacuum extraction effect can be ensured, the work of the pressure sensing assembly 16 is simplified, and the reliability of the work is ensured.

[0108] Further, in an embodiment, the heating assembly 11 includes two heating wires 111, the controller 500 sends a stop instruction to the heating assembly 11 and an open instruction to the electromagnetic valve 14 after S seconds after sending a heating instruction to the heating assembly 11, including:

[0109] sending a heating instruction to the heating assembly 11 includes:

[0110] sending a heating instruction to the first heating wire in the heating assembly 11;

[0111] after the first heating wire heats for S1 seconds, sending a stop instruction to the first heating wire and sending a heating instruction to the second heating wire in the heating assembly 11;

[0112] after the second heating wire in the heating assembly 11 heats for S2 seconds, sending a stop instruction to the second heating wire and sending an open instruction to the electromagnetic valve 14.

[0113] wherein the sum of S1 and S2 is S.

[0114] It should be noted that the number of alternations of the first heating wire and the second heating wire includes but is not limited to one time, and the first heating wire can be alternated to the second heating wire again after the second heating wire heats, and so on. The sum of the total heating time of the first heating wire and the total time of the second heating wire is S.

[0115] In another embodiment, the heating assembly 11 includes a single heating wire 111, the controller 500 sends a stop instruction to the heating wire 111 and an open instruction to the electromagnetic valve 14 after S seconds after sending a heating instruction to the heating wire 111, including intermittently sending a heating instruction to the heating wire 111;

[0116] After S3 seconds of sending the heating instruction to the heating wire 111, a stop instruction is sent to the heating wire 111, and after S4 seconds, a heating instruction is sent to the heating wire 111 again;

[0117] After S5 seconds of sending the heating instruction to the heating wire 111 again, a stop instruction is sent to the heating wire 111, and an open instruction is sent to the electromagnetic valve 14.

[0118] The sum of S3, S4 and S5 is S. Preferably, S3 is equal to S5. Further, the intermittent working times of the heating wire 111 include but are not limited to one cycle, and can also be multiple cycles. At this time, the sum of the total heating time of the heating wire 111 and the total interval time is S.

[0119] In some embodiments of the present application, the sealing machine can complete the sealing of dry and wet bags, so as to improve the use environment of the sealing.

[0120] The sealing machine for sealing wet bags according to the present application comprises a machine base 100, a machine cover 200, a lower sealing ring 12, an upper sealing ring 22, a heating assembly 11, a vacuum pump 15 and an electromagnetic valve 14.

[0121] The wet material 42 containing bag 41 is loaded between the machine base 100 and the machine cover 200, so that the opening of the bag 41 is located at the lower sealing cavity 31 or the upper sealing cavity 32.

[0122] The machine base 100 and the machine cover 200 are folded, so that the lower sealing ring 12 and the upper sealing ring 22 clamp the bag opening 411 of the bag 41 to be sealed, and the opening of the bag 41 is located in the sealing cavity 300.

[0123] The controller 500 controls the vacuum pump 15 to work to extract the gas in the sealing cavity 300.

[0124] When the air pressure value in the sealing cavity 300 decreases to E1, the sealing cavity 300 is in a first negative pressure state, the controller 500 controls the vacuum pump 15 to pause, and the controller 500 controls the electromagnetic valve 14 to open.

[0125] When the air pressure value in the sealing cavity 300 decreases to E2, the sealing cavity 300 is in a second negative pressure state, the controller 500 controls the electromagnetic valve 14 to close, and the controller 500 controls the heating assembly 11 to work.

[0126] After the heating assembly 11 works for S seconds, the controller 500 controls the heating assembly 11 to stop working, completes the sealing of the bag 41, and the controller 500 controls the electromagnetic valve 14 to open, so that the air pressure in the sealing cavity 300 returns to the normal pressure state.

[0127] After the sealing cavity 300 is in the normal pressure state, the controller 500 controls the electromagnetic valve 14 to close.

[0128] The machine base 100 is separated from the machine cover 200, the finished heat-sealed bag 41 is removed from the sealing machine, and a single sealing cycle is completed.

[0129] Referring to Figure 7 , Figure 7 The method steps for the sealing machine to extract the vacuum of the dry bag are provided for some embodiments of the present application. Based on the above sealing machine method for extracting the vacuum of the dry bag, the steps include:

[0130] The bag 41 containing the wet material 42 is loaded between the machine base 100 and the machine cover 200, so that the opening of the bag 41 is located at the lower sealing cavity 31 or the upper sealing cavity 32;

[0131] The machine base 100 is folded with the machine cover 200, so that the lower sealing ring 12 and the upper sealing ring 22 clamp the bag opening 411 of the bag 41 to be sealed, and the opening of the bag 41 is located in the sealing cavity 300;

[0132] The controller 500 controls the vacuum pump 15 to work to extract the gas in the sealing cavity 300;

[0133] When the air pressure value in the sealing cavity 300 decreases to E3, the sealing cavity 300 is in the third negative pressure state, the controller 500 controls the vacuum pump 15 to pause, and the controller 500 controls the heating assembly 11 to work;

[0134] After the heating assembly 11 works for S seconds, the controller 500 controls the heating assembly 11 to stop working, the sealing of the bag 41 is completed, and the controller 500 controls the electromagnetic valve 14 to open, so that the air pressure in the sealing cavity 300 returns to the normal air pressure state;

[0135] After the sealing cavity 300 is in the normal air pressure state, the controller 500 controls the electromagnetic valve 14 to close;

[0136] The machine base 100 is separated from the machine cover 200, the finished heat-sealed bag 41 is removed from the sealing machine, and a single sealing cycle is completed.

[0137] Specifically, the detection of the air pressure value in the sealing cavity 300 is performed by the pressure sensing assembly 16. However, it can be understood that since the volume of the sealing cavity 300 and the air duct assembly 13 is fixed, the subsequent work can also be performed after the corresponding air pressure value is reached by time control.

[0138] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combinations of the technical features do not contradict, they should be considered as within the scope of the present disclosure.

[0139] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are within the scope of protection of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A control method for a sealing machine suitable for vacuum sealing of wet bags, characterized in that, The steps of this method include: After receiving the main work command, a pumping command is sent to the vacuum pump (15) used to evacuate the sealed cavity (300); The gas pressure inside the sealed cavity (300) is detected. After receiving information that the sealed cavity (300) is in a first negative pressure state, a pause command is sent to the vacuum pump (15) and a first opening command is sent to the solenoid valve (14) used to supply gas to the sealed cavity (300). After receiving information that the sealing cavity (300) is in a second negative pressure state, a closing command is sent to the solenoid valve (14), and a heating command is sent to the heating assembly (11) used to heat seal the bag opening (411); including determining that the sealing cavity (300) is in a second negative pressure state after X seconds after sending the first opening command to the solenoid valve (14), where X is 0.1s-1s; After a heating command is sent to the heating assembly (11) for S seconds, a stop command is sent to the heating assembly (11) and a second opening command is sent to the solenoid valve (14); Upon receiving information that the sealed cavity (300) is under normal air pressure, a closing command is sent to the solenoid valve (14); The heating component (11) intermittently issues heating commands, including: A heating command is sent to the first heating wire in the heating assembly (11); After the first heating wire has been heated for S1 seconds, a stop command is sent to the first heating wire and a heating command is sent to the second heating wire in the heating assembly (11). After the second heating wire heats for S2 seconds, a stop command is sent to the second heating wire, and a second opening command is sent to the solenoid valve (14); wherein, the sum of S1 and S2 is S.

2. The method according to claim 1, characterized in that, Before the steps of issuing a pause command to the vacuum pump (15) and issuing a first opening command to the solenoid valve (14) used to supply air to the sealed cavity (300) after receiving information that the sealed cavity (300) is in a first negative pressure state, the method further includes the following steps: When the air pressure inside the sealed cavity (300) drops to E1, the pressure sensing component (16) sends out information that the sealed cavity (300) is in a first negative pressure state.

3. The method according to claim 2, characterized in that, Before the steps of issuing a closing command to the solenoid valve (14) and issuing a heating command to the heating assembly (11) used to heat seal the bag opening (411) after receiving information that the sealing cavity (300) is in a second negative pressure state, the method further includes the following steps: When the air pressure inside the sealed cavity (300) reaches E2, the pressure sensing component (16) sends out information that the sealed cavity (300) is in a second negative pressure state; Among them, E1 is lower than E2.

4. The method according to claim 1, characterized in that, The step of issuing a heating command to the heating component (11) includes: issuing a heating command to the heating component (11) intermittently; After a heating command is sent to the heating component (11) for S3 seconds, a stop command is sent to the heating component (11), and after an interval of S4 seconds, a heating command is sent to the heating component (11) again.

5. A controller (500) having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method as described in any one of claims 1-4; The processor, executing a computer program, can also implement the steps of a dry bag vacuum sealing machine control method, the steps of which include: After receiving the main working command, a pumping command is sent to the vacuum pump (15); Upon receiving information that the sealed cavity (300) is in a third negative pressure state, a pause command is sent to the vacuum pump (15) and a heating command is sent to the heating assembly (11); After a heating command is sent to the heating assembly (11) for S seconds, a stop command is sent to the heating assembly (11) and an opening command is sent to the solenoid valve (14); Upon receiving information that the sealed cavity (300) is under normal air pressure, a closing command is sent to the solenoid valve (14).

6. The controller (500) according to claim 5, characterized in that, Before the steps of issuing a pause command to the vacuum pump (15) and a heating command to the heating assembly (11) after receiving information that the sealed cavity (300) is in a third negative pressure state, the method further includes the following steps: When the air pressure inside the sealed cavity (300) drops to E3, the pressure sensing component (16) sends out information that the sealed cavity (300) is in a third negative pressure state.

7. The controller (500) according to claim 5, characterized in that, The information received that the sealed cavity (300) is in a third negative pressure state includes: Receive the first negative pressure status information; After a delay of M seconds, it is determined that the sealed cavity (300) is in a third negative pressure state.

8. A household sealing machine, characterized in that, include: A base (100) on which a heating assembly (11) and a lower sealing ring (12) are mounted; A cover (200) on which a hot press component (21) and an upper sealing ring (22) are mounted; Internal functional components, including a solenoid valve (14), a vacuum pump (15); and The controller (500) as described in any one of claims 5-7 is electrically connected to the heating assembly (11), the solenoid valve (14), and the vacuum pump (15), respectively. When the base (100) and the cover (200) are closed, the lower sealing ring (12) and the upper sealing ring (22) fit together to form the sealing cavity (300), and the solenoid valve (14) and the vacuum pump (15) are connected to the sealing cavity (300).

9. The sealing machine according to claim 8, characterized in that, The internal functional components also include a pressure sensing component (16) for detecting the air pressure inside the sealed cavity (300), and the controller (500) is electrically connected to the pressure sensing component (16); The pressure sensing component (16) sends the air pressure information in the sealed cavity (300) to the controller (500).

10. The sealing machine according to claim 9, characterized in that, The controller (500) includes a delay module, which, after receiving the air pressure information in the sealed cavity (300), sends a pause command to the vacuum pump (15) after a delay of M seconds.

11. The sealing machine according to claim 9, characterized in that, The internal functional components also include an air tube assembly (13), through which the solenoid valve (14), vacuum pump (15), and pressure sensing assembly (16) are connected to the sealed cavity (300).

12. The sealing machine according to claim 11, characterized in that, The airway assembly (13) includes a main airway (131) and a connector (132). The solenoid valve (14), vacuum pump (15), and pressure sensing assembly (16) are connected to the connector (132) through the branch airway (133). One end of the main airway (131) is connected to the connector (132), and the other end extends into the sealing cavity (300).

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