Filling method, device and filling machine for a filling machine

Abstract

This invention provides a filling method, apparatus, and filling machine for use in a filling machine. The method includes: responding to a filling signal, filling a container with liquid at a first filling speed to obtain the liquid level height in the container, and judging based on the liquid level height; if it is determined that the liquid level height has reached a preset liquid level, then filling the container with liquid at a second filling speed until the liquid in the container reaches the sealing liquid level, wherein the first filling speed is less than the second filling speed. This invention, by adjusting the filling speed, initially fills at a lower speed, using slow filling to form a certain amount of liquid at the bottom of the container before rapid filling, reducing the large impact force of the liquid due to flow. This allows the liquid at the bottom of the container to form a buffer during rapid filling, effectively reducing liquid splashing.

Description

Technical Field

[0001] This invention relates to the field of packaging equipment technology, and in particular to a filling method, apparatus and filling machine for use in a filling machine. Background Technology

[0002] Currently, filling machines typically use single-hole filling pipes for filling. During the sealing process between the valve stem and the filling pipe, there is a certain degree of non-coupling, which causes problems such as milk dripping and splashing when filling low-viscosity products. The milk droplets are irregularly distributed on the body and bottom of the package, resulting in poor market feedback. In severe cases, there may also be off-odors. Summary of the Invention

[0003] This invention provides a filling method, apparatus, and filling machine for use in filling machines, in order to solve the problems of milk dripping and splashing in existing filling processes.

[0004] According to a first aspect of the present invention, a filling method for a filling machine is provided, the filling machine comprising: a filling pipe and a container, wherein the discharge end of the filling pipe is correspondingly disposed with respect to the container;

[0005] The method includes:

[0006] In response to the injection signal, the injection tube injects liquid into the container at a first injection rate;

[0007] Obtain the liquid level height inside the container and make a judgment based on the liquid level height;

[0008] Once the liquid level is determined to reach the preset level, the filling tube fills the container with liquid at a second filling speed until the liquid in the container reaches the sealing level, wherein the first filling speed is less than the second filling speed.

[0009] According to one embodiment of the present invention, the step of injecting liquid into the container through the injection pipe at a first injection rate specifically includes:

[0010] Obtain the capacity parameters of the container and the type parameters of the liquid to be injected into the container;

[0011] The injection strategy for injecting liquid into the container is determined based on the capacity parameter and the type parameter.

[0012] According to one embodiment of the present invention, the step of determining the injection strategy for injecting liquid into the container based on the capacity parameter and the type parameter specifically includes:

[0013] The first injection rate for injecting the liquid into the container is determined based on the capacity parameter and the type parameter;

[0014] The amount of liquid to be injected into the container is determined based on the capacity parameter and the type parameter;

[0015] The injection time for injecting the liquid into the container is determined based on the first injection rate and the liquid volume.

[0016] The infusion strategy is generated based on the infusion duration and the first infusion rate.

[0017] According to one embodiment of the present invention, the step of determining the amount of liquid to be injected into the container based on the capacity parameter and the type parameter specifically includes:

[0018] The liquid volume is the critical amount at which the liquid entering the container directly contacts the bottom wall of the container when the injection pipe injects the liquid into the container at the first injection speed.

[0019] According to one embodiment of the present invention, the step of injecting liquid into the container at a second injection rate until the liquid in the container reaches the sealing liquid level specifically includes:

[0020] A second injection rate for injecting liquid into the container is determined based on the capacity parameter and the type parameter;

[0021] The sealing liquid level for filling the container with the liquid is determined based on the capacity parameter and the type parameter;

[0022] With the encapsulation liquid level as the target, the liquid is injected into the container according to the second injection rate.

[0023] According to one embodiment of the present invention, the filling machine further includes: a pressure cap, the pressure cap being disposed inside the filling pipe and being movable along the axial direction of the filling pipe for sealing the discharge end;

[0024] After the step of filling the container with liquid at a second filling rate until the liquid level in the container reaches the sealing level is reached, the process further includes:

[0025] Once the liquid level in the container is determined to be at the sealing level, the cap seals the outlet end of the filling tube.

[0026] According to one embodiment of the present invention, the step of determining that the liquid in the container has reached the sealing liquid level, and then sealing the outlet end of the filling tube with the cap, specifically includes:

[0027] Once it is determined that the liquid in the container has reached the sealing liquid level, a preset negative pressure value is applied to the filling tube;

[0028] While the pressure cap seals the outlet end of the injection pipe, the preset negative pressure value creates a negative pressure suction force inside the injection pipe.

[0029] According to one embodiment of the present invention, after the step of injecting liquid into the container at a second injection rate until the liquid in the container reaches the sealing liquid level, the method further includes:

[0030] The amount of splashed liquid outside the container is obtained, and the corresponding splash level is determined based on the amount of splashed liquid;

[0031] The filling nozzle of the filling tube is replaced according to the splash level, and the filling nozzle includes a plurality of filling holes for filling liquid into the container.

[0032] According to a second aspect of the present invention, a filling device for a filling machine includes: a signal response module, an acquisition and judgment module, and a filling execution module;

[0033] The signal response module is used to respond to the injection signal, and the injection tube injects liquid into the container at a first injection rate;

[0034] The acquisition and judgment module is used to acquire the liquid level height in the container and make a judgment based on the liquid level height;

[0035] The filling execution module is used to determine that the liquid level has reached the preset liquid level, and then the filling tube fills the container with liquid at the second filling speed until the liquid in the container reaches the sealing liquid level, wherein the first filling speed is less than the second filling speed.

[0036] According to a third aspect of the present invention, a filling machine is provided in which liquid is poured into a container using the filling method described above, or including the filling device described above for a filling machine.

[0037] The above-mentioned one or more technical solutions of the present invention have at least one of the following technical effects: The filling method, device and filling machine for filling machine provided by the present invention, by adjusting the filling speed, the initial filling is low, and a certain amount of liquid is formed at the bottom of the container by slow filling, and then the filling is carried out quickly, which reduces the large impact force of the liquid due to the flow, so that the liquid at the bottom of the container can form a certain buffer during the rapid filling process, thereby effectively reducing the splashing of liquid. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0039] Figure 1 This is one of the assembly relationship diagrams of the filling machine provided by the present invention;

[0040] Figure 2 This is the second schematic diagram of the assembly relationship of the filling machine provided by the present invention;

[0041] Figure 3 This is the third schematic diagram of the assembly relationship of the filling machine provided by the present invention;

[0042] Figure 4 This is a schematic flowchart of the filling method for a filling machine provided by the present invention;

[0043] Figure 5 This is a schematic diagram of the filling device for a filling machine provided by the present invention.

[0044] Figure label:

[0045] 10. Injection pipe; 11. Injection nozzle; 20. Container; 30. Cap;

[0046] 40. Signal Response Module; 50. Acquisition and Judgment Module; 60. Injection Execution Module. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0049] The present invention will now be described in detail with reference to specific embodiments.

[0050] In some specific embodiments of the present invention, such as Figures 1 to 4 As shown, this solution provides a filling method for a filling machine, which includes a filling pipe 10 and a container 20, with the discharge end of the filling pipe 10 corresponding to the container 20.

[0051] The methods include:

[0052] In response to the injection signal, the injection pipe 10 injects liquid into the container 20 at a first injection rate;

[0053] Obtain the liquid level height inside container 20 and make a judgment based on the liquid level height;

[0054] Once the liquid level reaches the preset level, the filling pipe 10 fills the container 20 with liquid at the second filling speed until the liquid in the container 20 reaches the sealing level. The first filling speed is less than the second filling speed.

[0055] It should be noted that the present invention also includes an injection valve connected to the injection pipe 10. The control program of the injection valve is fixed, that is, the timing of the injection valve is not adjusted.

[0056] In a possible implementation, since the filling machine uses a servo motor to control the piston movement during the filling process, the piston stroke curve is adjusted by modifying the servo motor control program. During the initial filling process, slow filling (20% of the filling volume) is used, extending the initial filling time (0.05 seconds longer than the standard curve); rapid filling is then performed after a certain amount of liquid has formed at the bottom of container 20. With a certain amount of liquid at the bottom of container 20, the large impact force caused by liquid flow is reduced, increasing the filling liquid buffer and thus mitigating splashing.

[0057] In some possible embodiments of the present invention, the step of injecting liquid into the container 20 at a first injection rate via the injection pipe 10 specifically includes:

[0058] Obtain the capacity parameters of container 20, and the type parameters of the liquid to be injected into container 20;

[0059] The injection strategy for injecting liquid into container 20 is determined based on capacity and type parameters.

[0060] Specifically, this embodiment provides an implementation method for injecting liquid into a container 20 at a first injection rate using an injection pipe 10. The capacity parameters of the container 20 and the type parameters of the liquid being injected into the container 20 are obtained. Different types of liquids have different viscosities and different preset bottom liquid levels to be formed in the container 20. By obtaining the type parameters of the liquid and the capacity parameters of the container 20, the preset liquid level to be injected into the corresponding container 20 is determined.

[0061] In a possible implementation, the liquid poured into container 20 is a dairy product.

[0062] In a possible implementation, the liquid poured into container 20 is a dairy product containing fruit pieces.

[0063] In a possible implementation, the liquid poured into container 20 is a soft drink, which has a lower viscosity than dairy products.

[0064] In some possible embodiments of the present invention, the step of determining the injection strategy for injecting liquid into the container 20 based on capacity parameters and type parameters specifically includes:

[0065] The first injection rate for injecting the liquid into container 20 is determined based on the capacity and type parameters.

[0066] The amount of liquid to be poured into container 20 is determined based on the capacity and type parameters;

[0067] The injection time for injecting liquid into container 20 is determined based on the first injection rate and the amount of liquid.

[0068] An infusion strategy is generated based on the infusion duration and the initial infusion rate.

[0069] Specifically, this embodiment provides an implementation method for determining a filling strategy for filling liquid into container 20 based on capacity parameters and type parameters. The first filling speed for filling liquid into container 20 is determined based on the capacity parameters of different containers 20 and the type parameters of the liquid.

[0070] Furthermore, the amount of liquid to be poured into container 20 is determined by capacity and type parameters. This setting ensures that the speed and amount of liquid poured into container 20 can meet the requirements of forming a certain liquid layer at the bottom of container 20, thus avoiding splashing and other problems caused by impact force after the liquid enters container 20.

[0071] In some possible embodiments of the present invention, the step of determining the amount of liquid to be injected into the container 20 based on the capacity parameter and the type parameter specifically includes:

[0072] The liquid volume is the critical amount at which the liquid entering the container 20 directly contacts the bottom wall of the container 20 when the injection pipe 10 injects the liquid into the container 20 at the first injection speed.

[0073] Specifically, this embodiment provides an implementation method for determining the amount of liquid to be injected into container 20 based on capacity parameters and type parameters. By setting the amount of liquid to a critical amount that allows the liquid entering container 20 later to contact the bottom wall of container 20, on the one hand, a splash-proof layer is formed by injecting a certain amount of liquid at the bottom of container 20, thus avoiding splashing of the liquid entering container 20 later. On the other hand, setting the critical value greatly improves the injection efficiency and avoids the problem of poor overall injection effect caused by excessive liquid in the splash-proof layer.

[0074] In some possible embodiments of the present invention, the step of filling the filling tube 10 into the container 20 with liquid at a second filling rate until the liquid in the container 20 reaches the sealing liquid level specifically includes:

[0075] The second injection rate for injecting the liquid into container 20 is determined based on the capacity and type parameters.

[0076] The sealing liquid level for filling the container 20 is determined based on the capacity and type parameters;

[0077] With the target liquid level as the objective, liquid is injected into container 20 according to the second injection rate.

[0078] Specifically, this embodiment provides an implementation method for injecting liquid into a container 20 at a second injection speed using an injection pipe 10. The second injection speed for injecting liquid into the container 20 is determined according to the capacity parameters of different containers 20 and the type parameters of the liquid, so that the liquid in the container 20 can be quickly filled according to the second injection speed.

[0079] Furthermore, the level of the encapsulation liquid filled in the container 20 is determined by the capacity and type parameters. This setting ensures the encapsulation of the container 20 according to the different capacities of the container 20 and the type of liquid, avoiding problems such as leakage of liquid from the container 20 due to overfilling, and splashing due to impact or other reasons.

[0080] In some possible embodiments of the present invention, the filling machine further includes: a cap 30, which is disposed inside the filling pipe 10 and is movable along the axial direction of the filling pipe 10 for sealing the discharge end;

[0081] After the step of filling the container 20 with liquid at a second filling rate through the filling tube 10 until the liquid in the container 20 reaches the sealing liquid level, the process further includes:

[0082] Once the liquid level in container 20 is reached, the cap 30 seals the outlet end of the filling tube 10.

[0083] Specifically, this embodiment provides another implementation method for injecting liquid into the container 20 through the injection tube 10 at a second injection speed. By setting the cap 30, the outlet end of the injection tube 10 is sealed to avoid dripping after injection, ensuring the filling effect of the container 20 after injection, and preventing the irregular distribution of dripping on the outer surface of the container 20, which could lead to problems such as odor and decreased user experience.

[0084] In a possible implementation, the discharge end of the filling tube 10 is provided with a filling nozzle 11, which has multiple filling holes. The cap 30 seals the discharge end of the filling tube 10 by closing the filling holes.

[0085] In some possible embodiments of the present invention, the step of determining that the liquid in the container 20 has reached the sealing liquid level, and then sealing the outlet end of the filling tube 10 with the cap 30, specifically includes:

[0086] Once the liquid in container 20 reaches the sealing level, a preset negative pressure value is applied to the filling pipe 10.

[0087] While the cap 30 seals the outlet end of the injection pipe 10, a preset negative pressure value is used to create a negative pressure suction force inside the injection pipe 10.

[0088] Specifically, this embodiment provides an implementation method for sealing the outlet end of the filling tube 10 with a cap 30. By applying a certain negative pressure to the filling tube 10, the residual liquid in the filling tube 10 can be drawn back during the sealing process, preventing the liquid from dripping from the outlet end of the filling tube 10 and causing dripping.

[0089] It should be noted that the negative pressure applied inside the filling tube 10 can be achieved by connecting a negative pressure pipeline to the filling tube 10. During the process of sealing the filling tube 10 through the cap 30, a certain negative pressure is applied to the negative pressure pipeline, thereby creating an internal negative pressure environment for the filling tube 10 during sealing, and enabling the back suction of residual liquid inside.

[0090] In some possible embodiments of the present invention, after the step of filling the filling tube 10 into the container 20 at a second filling rate until the liquid in the container 20 reaches the sealing liquid level, the method further includes:

[0091] The amount of splashed liquid outside container 20 is obtained, and the corresponding splash level is determined based on the amount of splashed liquid;

[0092] The filling nozzle 11 of the filling pipe 10 is replaced according to the splash level. The filling nozzle 11 includes a plurality of filling holes for filling liquid into the container 20.

[0093] Specifically, this embodiment provides another implementation method for injecting liquid into the container 20 through the injection pipe 10 at a second injection speed. During the process of slowly injecting the anti-splash layer into the container 20 at the first injection speed and then rapidly injecting the entire contents into the container 20 at the second injection speed, there will still be some splashing or dripping. Therefore, by obtaining the amount of splashing, the splash level is determined, and then the corresponding injection nozzle 11 is replaced according to the splash level, ensuring the overall injection effect and completely solving the splashing and dripping situation during the injection process.

[0094] In some specific embodiments of the present invention, such as Figure 5 As shown, this solution provides a filling device for a filling machine, including: a signal response module 40, an acquisition and judgment module 50, and a filling execution module 60;

[0095] The signal response module 40 is used to respond to the injection signal, and the injection pipe 10 injects liquid into the container 20 at a first injection speed;

[0096] The judgment module 50 is used to obtain the liquid level height in the container 20 and make a judgment based on the liquid level height;

[0097] The filling execution module 60 is used to determine that the liquid level has reached the preset liquid level. Then, the filling pipe 10 fills the liquid into the container 20 at the second filling speed until the liquid in the container 20 reaches the sealing liquid level. The first filling speed is less than the second filling speed.

[0098] Optionally, the step of injecting liquid into the container 20 at a first injection rate via the injection pipe 10 specifically includes:

[0099] Obtain the capacity parameters of container 20, and the type parameters of the liquid to be injected into container 20;

[0100] The injection strategy for injecting liquid into container 20 is determined based on capacity and type parameters.

[0101] Optionally, the step of determining the injection strategy for injecting the liquid into the container 20 based on the capacity parameters and type parameters specifically includes:

[0102] The first injection rate for injecting the liquid into container 20 is determined based on the capacity and type parameters.

[0103] The amount of liquid to be poured into container 20 is determined based on the capacity and type parameters;

[0104] The injection time for injecting liquid into container 20 is determined based on the first injection rate and the amount of liquid.

[0105] An infusion strategy is generated based on the infusion duration and the initial infusion rate.

[0106] Optionally, the step of determining the amount of liquid to be injected into container 20 based on capacity and type parameters specifically includes:

[0107] The liquid volume is the critical amount at which the liquid entering the container 20 directly contacts the bottom wall of the container 20 when the injection pipe 10 injects the liquid into the container 20 at the first injection speed.

[0108] Optionally, the step of filling the container 20 with liquid at a second filling rate until the liquid in the container 20 reaches the sealing liquid level specifically includes:

[0109] The second injection rate for injecting the liquid into container 20 is determined based on the capacity and type parameters.

[0110] The sealing liquid level for filling the container 20 is determined based on the capacity and type parameters;

[0111] With the target liquid level as the objective, liquid is injected into container 20 according to the second injection rate.

[0112] Optionally, the filling machine also includes: a cap 30, which is disposed inside the filling pipe 10 and can move along the axial direction of the filling pipe 10 to seal the discharge end;

[0113] After the step of filling the container 20 with liquid at a second filling rate through the filling tube 10 until the liquid in the container 20 reaches the sealing liquid level, the process further includes:

[0114] Once the liquid level in container 20 is reached, the cap 30 seals the outlet end of the filling tube 10.

[0115] Optionally, the step of sealing the outlet end of the filling tube 10 with the cap 30 after determining that the liquid in the container 20 has reached the sealing liquid level specifically includes:

[0116] Once the liquid in container 20 reaches the sealing level, a preset negative pressure value is applied to the filling pipe 10.

[0117] While the cap 30 seals the outlet end of the injection pipe 10, a preset negative pressure value is used to create a negative pressure suction force inside the injection pipe 10.

[0118] Optionally, after the step of filling the filling tube 10 into the container 20 at a second filling rate until the liquid in the container 20 reaches the sealing liquid level, the process further includes:

[0119] The amount of splashed liquid outside container 20 is obtained, and the corresponding splash level is determined based on the amount of splashed liquid;

[0120] The filling nozzle 11 of the filling pipe 10 is replaced according to the splash level. The filling nozzle 11 includes a plurality of filling holes for filling liquid into the container 20.

[0121] In some specific embodiments of the present invention, this solution provides a filling machine that, when filling liquid into a container 20, employs the filling method described above for a filling machine, or includes the filling device described above for a filling machine.

[0122] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.

[0123] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0124] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "method," "specific method," or "some methods," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or method is included in at least one embodiment or method of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or method. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or methods. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or methods described in this specification, as well as the features of different embodiments or methods.

[0125] Finally, it should be noted that the above embodiments are only for illustrating the present invention and not for limiting the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications, or equivalent substitutions of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention and should be covered within the scope of the claims of the present invention.

Claims

1. A method of filling for a filling machine, characterized in that, The filling machine includes: a filling pipe and a container, wherein the discharge end of the filling pipe is correspondingly arranged with respect to the container; The method includes: In response to the injection signal, the injection tube injects liquid into the container at a first injection rate to form a liquid layer at the bottom of the container; Obtain the liquid level height inside the container and make a judgment based on the liquid level height; Once the liquid level is determined to reach the preset liquid level, the filling tube fills the container with liquid at the second filling speed until the liquid in the container reaches the sealing liquid level, and the first filling speed is less than the second filling speed. The step of injecting liquid into the container through the injection pipe at a first injection rate specifically includes: Obtain the capacity parameters of the container and the type parameters of the liquid to be injected into the container; The first injection rate for injecting the liquid into the container is determined based on the capacity parameter and the type parameter; The amount of liquid to be injected into the container is determined based on the capacity parameter and the type parameter; The injection time for injecting the liquid into the container is determined based on the first injection rate and the liquid volume. An infusion strategy is generated based on the infusion duration and the first infusion rate. The infusion strategy is a strategy for infusing liquid into a container based on capacity parameters and type parameters.

2. The method for filling according to claim 1, characterized in that, The step of determining the amount of liquid to be injected into the container based on the capacity parameter and the type parameter specifically includes: The liquid volume is the critical amount at which the liquid entering the container directly contacts the bottom wall of the container when the injection pipe injects the liquid into the container at the first injection speed.

3. Filling method for a filling machine according to claim 1 or 2, characterized in that, The step of injecting liquid into the container at a second injection rate until the liquid level in the container reaches the sealing level specifically includes: A second injection rate for injecting liquid into the container is determined based on the capacity parameter and the type parameter; The sealing liquid level for filling the container with the liquid is determined based on the capacity parameter and the type parameter; With the encapsulation liquid level as the target, the liquid is injected into the container according to the second injection rate.

4. The method for filling according to claim 1 or 2, characterized in that, The filling machine further includes: a pressure cap, which is disposed inside the filling pipe and can move along the axial direction of the filling pipe to seal the discharge end; After the step of filling the container with liquid at a second filling rate until the liquid level in the container reaches the sealing level is reached, the process further includes: Once the liquid level in the container is determined to be at the sealing level, the cap seals the outlet end of the filling tube.

5. The method for filling according to claim 4, characterized in that, The step of determining that the liquid level in the container has reached the sealing level, and then sealing the outlet end of the filling tube with the cap, specifically includes: Once it is determined that the liquid in the container has reached the sealing liquid level, a preset negative pressure value is applied to the filling tube; While the pressure cap seals the outlet end of the injection pipe, the preset negative pressure value creates a negative pressure suction force inside the injection pipe.

6. The method for filling according to claim 1 or 2, characterized in that, After the step of filling the container with liquid at a second filling rate until the liquid level in the container reaches the sealing level is reached, the process further includes: The amount of splashed liquid outside the container is obtained, and the corresponding splash level is determined based on the amount of splashed liquid; The filling nozzle of the filling tube is replaced according to the splash level, and the filling nozzle includes a plurality of filling holes for filling liquid into the container.

7. A filling device for a filling machine, characterized in that The filling machine includes: a filling pipe and a container, wherein the discharge end of the filling pipe is correspondingly arranged with respect to the container; The device includes: a signal response module, an acquisition and judgment module, and an injection execution module; The signal response module is used to respond to the infusion signal, and the infusion tube infuses liquid into the container at a first infusion rate to form a liquid layer at the bottom of the container; The acquisition and judgment module is used to acquire the liquid level height in the container and make a judgment based on the liquid level height; The filling execution module is used to determine that the liquid level reaches the preset liquid level, and then the filling tube fills the container with liquid at the second filling speed until the liquid in the container reaches the sealing liquid level. The first filling speed is less than the second filling speed. The step of injecting liquid into the container through the injection pipe at a first injection rate specifically includes: Obtain the capacity parameters of the container and the type parameters of the liquid to be injected into the container; The first injection rate for injecting the liquid into the container is determined based on the capacity parameter and the type parameter; The amount of liquid to be injected into the container is determined based on the capacity parameter and the type parameter; The injection time for injecting the liquid into the container is determined based on the first injection rate and the liquid volume. An infusion strategy is generated based on the infusion duration and the first infusion rate. The infusion strategy is a strategy for infusing liquid into a container based on capacity parameters and type parameters.

8. A filling machine characterized in that, When filling the container with liquid, the filling method for the filling machine as described in any one of claims 1 to 6 is used, or the filling device for the filling machine as described in claim 7 is used.

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