Method and vacuum device for the controlled vacuum packaging of hot liquids or liquid-containing food

Abstract

The application discloses a control method and a vacuum device for hot liquid or liquid-containing food vacuum packaging. The method comprises the following steps: after a vacuum bag is placed in a vacuum cavity, the vacuum device is started to pump the vacuum bag, wherein the vacuum bag contains an object to be vacuumized, and the object to be vacuumized comprises hot liquid and / or liquid-containing food; a real-time temperature of the object to be vacuumized is obtained; a target vacuum degree is determined based on the real-time temperature; a total time required for vacuumizing is determined based on the target vacuum degree; a cavity vacuum degree of the vacuum cavity is determined; and the vacuum device is controlled based on a comparison result between the cavity vacuum degree and the target vacuum degree and a comparison result between the total time required for vacuumizing and a cumulative pumping time, so that low-pressure boiling of the liquid-containing food in the vacuumizing process is reduced, and liquid leakage into the vacuum cavity is avoided.

Description

Technical Field

[0001] This application relates to the field of vacuum packaging technology, and in particular to a control method and vacuum device for vacuum packaging of hot liquids or liquid-containing foods. Background Technology

[0002] With the increasing popularity of vacuum preservation and vacuum cooking technologies, cavity vacuum machines that can vacuum seal liquid-containing foods are being used more and more commonly in home and commercial settings. Typically, the main component of the liquid in liquid-containing foods is water.

[0003] Traditional chamber vacuum sealers often suffer from the following problems: during the sealing of liquids or foods containing liquid, as the gas inside the chamber decreases, the sealed liquid may experience low-pressure boiling, causing the liquid to leak out of the vacuum bag into the vacuum chamber. For example, when vacuuming high-temperature liquids, the high initial temperature makes it particularly easy to reach a low-pressure boiling state. Furthermore, because these liquids often contain oil and / or various sauces, cleaning is very difficult; if not cleaned promptly, it will contaminate the outer surface of subsequently sealed vacuum bags and even contaminate the food, and the time required for cleaning directly affects the efficiency of continuous operation. Summary of the Invention

[0004] To address the aforementioned technical problems, this application proposes a control method and vacuum device for vacuum packaging of hot liquids or liquid-containing foods, which can reduce the low-pressure boiling phenomenon that occurs in liquid-containing foods during the vacuuming process and minimize the leakage of liquid into the vacuum chamber.

[0005] In a first aspect, embodiments of this application provide a control method for vacuum packaging of hot liquids or liquid-containing foods, used to control a vacuum device having a vacuum chamber, the method comprising:

[0006] After the vacuum bag is placed into the vacuum chamber, the vacuum device is activated to evacuate the vacuum bag, wherein the vacuum bag contains an object to be vacuumed, the object to be vacuumed including hot liquid and / or food containing liquid.

[0007] Obtain the real-time temperature of the object to be vacuumed;

[0008] The target vacuum level is determined based on the real-time temperature.

[0009] Based on the target vacuum level, determine the total time required for vacuuming;

[0010] Determine the vacuum level inside the vacuum chamber;

[0011] The vacuum device is controlled based on the comparison between the vacuum level inside the cavity and the target vacuum level, as well as the comparison between the total time required for evacuation and the cumulative evacuation time.

[0012] Optionally, the real-time temperature is detected by a temperature sensing component, and the vacuum level inside the cavity is detected by a pressure sensor.

[0013] Optionally, determining the target vacuum level based on the real-time temperature includes:

[0014] A first data table is determined, wherein the first data table includes multiple experimental temperatures and their respective corresponding experimental vacuum levels;

[0015] The experimental vacuum degree that matches the real-time temperature is retrieved from the first data table, and the target vacuum degree is determined based on the retrieved experimental vacuum degree.

[0016] Optionally, determining the total time required for evacuation based on the target vacuum level includes:

[0017] Determine a second data table, wherein the second data table includes multiple experimental vacuum levels and their respective corresponding times;

[0018] The time matching the target vacuum level is retrieved from the second data table to determine the total time required for evacuation based on the retrieved time.

[0019] Optionally, controlling the vacuum device based on the comparison between the intracavity vacuum level and the target vacuum level, and the comparison between the total time required for evacuation and the cumulative evacuation time, includes:

[0020] When the vacuum level inside the cavity is equal to the target vacuum level, if the total time required for vacuuming is equal to the cumulative pumping time, then the vacuum device is controlled to stop pumping; otherwise, the process returns to the step of obtaining the real-time temperature of the object to be vacuumed.

[0021] Optionally, the method further includes:

[0022] Each time the step of obtaining the real-time temperature of the object to be vacuumed is returned, the number of cycles is accumulated once. And every R cycles, if the vacuum device has not stopped pumping and the preset conditions are met, the pumping power of the vacuum device is reduced by a set ratio, thereby reducing the speed of the vacuum pump motor of the vacuum device and controlling the pumping time, where R is a positive integer.

[0023] Optionally, the preset conditions include at least one of the following:

[0024] The difference between the total time required for vacuuming and the cumulative pumping time is less than a set difference threshold.

[0025] The ratio of the cumulative pumping time divided by the total time required for vacuuming is greater than a set ratio threshold.

[0026] Optionally, R is determined based on information about the vacuum device and / or information about the object to be evacuated;

[0027] The set ratio is a preset fixed value, or it is determined based on the information of the vacuum device and / or the information of the object to be vacuumed.

[0028] Optionally, before activating the vacuum device to evacuate the vacuum bag, the method further includes:

[0029] Determine the initial vacuuming time;

[0030] The step of activating the vacuum device to evacuate the vacuum bag includes:

[0031] The vacuum device is activated to evacuate the vacuum bag according to the initial vacuuming time.

[0032] Secondly, embodiments of this application provide a vacuum device, comprising:

[0033] Vacuum cavity; and,

[0034] The controller is configured to perform any of the methods described above.

[0035] In summary, the embodiments of this application have at least the following beneficial effects:

[0036] In this embodiment, after a vacuum bag is placed into the vacuum chamber, the vacuum device is activated to evacuate the vacuum bag. The vacuum bag contains an object to be evacuated, which may include hot liquid and / or food containing liquid. The real-time temperature of the object to be evacuated is obtained. Based on the real-time temperature, a target vacuum level is determined. Based on the target vacuum level, the total time required for evacuation is determined. The vacuum level inside the vacuum chamber is determined. Based on a comparison between the vacuum level inside the chamber and the target vacuum level, and a comparison between the total time required for evacuation and the cumulative evacuation time, the vacuum device is controlled. This reduces the low-pressure boiling phenomenon that occurs when liquid food is present during evacuation and minimizes the leakage of liquid into the vacuum chamber. Attached Figure Description

[0037] Figure 1 This is a schematic flowchart of a control method for vacuum packaging of hot liquids or liquid-containing foods provided in an embodiment of this application.

[0038] Figure 2 This is a schematic diagram of the vacuum device provided in the embodiments of this application. Detailed Implementation

[0039] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0040] In the description of this application, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more. In the description of this application, the term "comprising" and its variations are open-ended, meaning "including but not limited to." The term "based on" means "at least partially based on." The term "according to" means "at least partially according to." The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments."

[0041] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0042] In the description of this application, it should be noted that, unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this application is for the purpose of describing specific embodiments only and is not intended to limit the application. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0043] Firstly, see [the following] Figure 1This diagram illustrates a flow chart of a control method for vacuum packaging of hot liquids or liquid-containing foods according to an embodiment of this application. The method controls a vacuum device with a vacuum chamber and includes steps S101-S106, as detailed below:

[0044] S101, after the vacuum bag is placed into the vacuum chamber, the vacuum device is activated to evacuate the vacuum bag, wherein the vacuum bag contains an object to be vacuumed, the object to be vacuumed includes hot liquid and / or food containing liquid.

[0045] In one example, the vacuum device may further include a vacuum pump assembly capable of performing the evacuation operation of the vacuum device (equivalent to evacuating the vacuum bag). Exemplarily, the vacuum pump assembly may include one or more vacuum pumps, and the power of the evacuation operation (equivalent to adjusting the evacuation power of the vacuum device) can be adjusted by changing the rotational speed of at least one of the one or more vacuum pumps. In some cases, when a large amount of liquid leaks during the vacuuming process, the leaked liquid may be drawn into the vacuum pump, causing vacuum pump oil contamination. In severe cases, the oil filter and vacuum pump oil need to be replaced. In such cases, this embodiment can minimize the risk of vacuum pump contamination.

[0046] S102, obtain the real-time temperature of the object to be vacuumed; wherein, the subsequent c i It can represent the real-time temperature at time i.

[0047] S103, based on the real-time temperature, determine the target vacuum level; where, corresponding to c i The target vacuum degree can be expressed as

[0048] In one example, step S103 may include: calculating the target vacuum degree based on the real-time temperature using a first fitting function, wherein the first fitting function may be a function obtained by mathematically fitting multiple pre-determined experimental temperatures and their corresponding experimental vacuum degrees. For example, a coordinate pair is formed by using one of an experimental temperature and its corresponding experimental vacuum degree as the abscissa and the other as the ordinate, and then mathematical fitting is performed using all coordinate pairs.

[0049] The experimental temperature and vacuum level are pre-measured through a first experimental operation. This first experimental operation involves setting an experimental temperature, evacuating the experimental object until the liquid contained in the experimental object exhibits low-pressure boiling, and detecting and recording the vacuum level at which this phenomenon occurs as the experimental vacuum level corresponding to that experimental temperature (i.e., the current boiling point of water). The experimental object is one that matches the object to be evacuated. For example, the liquid contained in the object to be evacuated can be used directly as the experimental object, typically water, but other experimental objects can be selected based on the actual application scenario (e.g., the actual composition of the object to be evacuated).

[0050] In another example, the experimental temperature and vacuum level mentioned above can also be used as sample data to train the artificial intelligence model, so that the trained artificial intelligence model has the ability to take temperature as input and the corresponding vacuum level as output. Therefore, there are various ways to determine the target vacuum level based on real-time temperature, which are not specifically limited here.

[0051] S104, based on the target vacuum level, determine the total time required for vacuuming; wherein, corresponding to The total time required for vacuuming can be expressed as T. i .

[0052] In one example, step S104 may include: calculating the total time required for evacuation based on the target vacuum level using a second fitting function, wherein the second fitting function may be a function obtained by mathematically fitting multiple pre-determined experimental vacuum levels and their corresponding times (durations), for example, using one of an experimental vacuum level and its corresponding time as the abscissa and the other as the ordinate to form a coordinate pair, and then using all coordinate pairs for mathematical fitting.

[0053] The experimental vacuum level and its corresponding time are pre-measured through a second experimental operation. This second experimental operation involves evacuating the vacuum bag to each experimental vacuum level and recording the total time required to obtain the time corresponding to that experimental vacuum level. Here, the initial vacuum level before evacuation can typically be standard atmospheric pressure, or it can be determined based on the actual situation. Furthermore, each experimental vacuum level in this second experimental operation can also be measured for different vacuum chambers and / or different placement of items, which is not specifically limited here.

[0054] In another example, the experimental vacuum level and its corresponding time can also be used as sample data to train the artificial intelligence model, so that the trained artificial intelligence model has the ability to take the vacuum level as input and the corresponding time as output. Therefore, there are various ways to determine the total time required for vacuuming based on the target vacuum level, which are not specifically limited here.

[0055] S105, Determine the vacuum level inside the vacuum chamber;

[0056] S106, based on the comparison between the cavity vacuum level and the target vacuum level, and the comparison between the total time required for vacuuming and the cumulative pumping time, the vacuum device is controlled. The cumulative pumping time can be expressed as T. now .

[0057] It is understood that the control method of step S106 can be varied. For example, when the vacuum level in the cavity is close to the target vacuum level and / or the cumulative pumping time is close to the total time required for vacuuming, the pumping of the vacuum device can be reduced or even stopped to avoid the vacuum level in the cavity from exceeding the target vacuum level. It is also possible to extend the total time required for vacuuming configured by the vacuum device when the cumulative pumping time is close to the total time required for vacuuming but the vacuum level in the cavity is still much lower than the target vacuum level. This is not specifically limited here.

[0058] In one example, the real-time temperature may include the object temperature of the object to be vacuumed and / or the ambient temperature of the environment in which the object is located; it should be understood that the experimental temperature in each embodiment of this application should match the specific temperature type included in the real-time temperature. For example, when the real-time temperature includes the object temperature, the corresponding experimental temperature should also include the object experimental temperature.

[0059] In one alternative implementation, the real-time temperature is detected by a temperature sensing component, and the cavity vacuum is detected by a pressure sensor.

[0060] In one example, the temperature sensing component may include a contact temperature sensor, an infrared temperature sensor, and / or other temperature-sensing sensors. Correspondingly, the installation location of the temperature sensing component can be varied, but preferably, it can be installed directly below the object to be vacuumed (such as directly below a liquid tray or a vacuum chamber). Depending on the actual application scenario, it can also be placed around or on top of the object to be vacuumed, or, via wired or wireless connection, inside the object or inside a vacuum bag.

[0061] In one optional implementation, determining the target vacuum level based on the real-time temperature includes:

[0062] A first data table is determined, wherein the first data table includes multiple experimental temperatures and their respective corresponding experimental vacuum levels;

[0063] The experimental vacuum degree that matches the real-time temperature is retrieved from the first data table, and the target vacuum degree is determined based on the retrieved experimental vacuum degree.

[0064] It should be noted that the experimental temperature and experimental vacuum degree described in this embodiment can be referred to the description in the above embodiment, and will not be repeated here. In addition, it should be understood that when looking up the table, if there is no experimental temperature in the first data table that is equal to the real-time temperature, the retrieved experimental vacuum degree usually refers to the experimental vacuum degree that has the highest similarity (i.e., the closest) to the real-time temperature.

[0065] In this embodiment, table lookup can reduce the amount of computation, improve efficiency, and enhance the real-time response of control.

[0066] In one optional implementation, determining the total time required for evacuation based on the target vacuum level includes:

[0067] Determine a second data table, wherein the second data table includes multiple experimental vacuum levels and their respective corresponding times;

[0068] The time matching the target vacuum level is retrieved from the second data table to determine the total time required for evacuation based on the retrieved time.

[0069] It should be noted that the experimental vacuum degree and its corresponding time described in this embodiment can be referred to the description in the above embodiment, and will not be repeated here. In addition, it should be understood that when looking up the table, if there is no experimental vacuum degree equal to the target vacuum degree in the second data table, the retrieved time usually refers to the time with the highest similarity (i.e., closest) to the target vacuum degree.

[0070] In this embodiment, table lookup can reduce the amount of computation, improve efficiency, and enhance the real-time response of control.

[0071] In one optional implementation, controlling the vacuum device based on the comparison between the intracavity vacuum level and the target vacuum level, and the comparison between the total time required for evacuation and the cumulative pumping time, includes:

[0072] When the vacuum level inside the cavity is equal to the target vacuum level, if the total time required for vacuuming is equal to the cumulative pumping time, then the vacuum device is controlled to stop pumping; otherwise, the process returns to the step of obtaining the real-time temperature of the object to be vacuumed.

[0073] It should be noted that when the vacuum level inside the cavity reaches the target vacuum level, and T i -T now If the value is 0, the vacuum device will stop pumping air; otherwise, the latest real-time temperature will be obtained again to repeat the subsequent steps until the vacuum device can be controlled to stop pumping air.

[0074] In one example, the method may further include: when the vacuum device stops pumping air, controlling the heater of the vacuum device to heat seal the vacuum bag.

[0075] In an optional implementation, the method further includes:

[0076] Each time the step of obtaining the real-time temperature of the object to be vacuumed is returned, the number of cycles is accumulated once. And every R cycles, if the vacuum device has not stopped pumping and the preset conditions are met, the pumping power of the vacuum device is reduced by a set ratio, thereby reducing the speed of the vacuum pump motor of the vacuum device and controlling the pumping time, where R is a positive integer.

[0077] It should be noted that the reduced pumping power usually needs to maintain normal operating conditions (for example, taking a vacuum pump as an example, the adjusted vacuum pump will not stall due to the speed being too slow).

[0078] In one example, the pumping power can be reduced by lowering the input voltage of the vacuum device's pumping module (such as a vacuum pump set). This allows more time for subsequent continuous monitoring and control operations, preventing excessively fast pumping speeds (excessive pumping power) from causing the vacuum level inside the cavity / bag to reach or exceed the target vacuum level prematurely, thus preventing liquid from leaking out of the bag due to boiling. The set percentage can be denoted as Q%, which represents the reduction ratio of the rotation speed confirmed based on experimental experience.

[0079] In one optional implementation, the preset conditions include at least one of the following:

[0080] The difference between the total time required for vacuuming and the cumulative pumping time is less than a set difference threshold M, and its expression formula can be: T i -T now <M。

[0081] The ratio of the cumulative pumping time divided by the total time required for vacuuming is greater than a set ratio threshold N, and its expression formula can be:

[0082] In one example, the difference threshold M can be a fixed time threshold determined based on experimental experience, and the ratio threshold N can be a fixed time ratio threshold determined based on experimental experience.

[0083] In one optional implementation, R is determined based on information about the vacuum device and / or information about the object to be vacuumed. For example, if the vacuum device has a high pumping power (e.g., a high speed of the vacuum pump) and / or the liquid content of the object to be vacuumed is high, the value of R can be appropriately reduced to allow for more frequent adjustment of the pumping power (e.g., the speed of the vacuum pump). If the vacuum device has a low pumping power (e.g., a low speed of the vacuum pump) and / or the liquid content of the object to be vacuumed is low, the value of R can be appropriately increased to reduce the adjustment frequency.

[0084] The set ratio is a preset fixed value, or it is determined based on information from the vacuum device and / or information from the object to be evacuated. For example, the set ratio may be a sequence of gradually changing values ​​determined based on information from the vacuum device and / or information from the object to be evacuated.

[0085] In one alternative implementation, before activating the vacuum device to evacuate the vacuum bag, the method further includes:

[0086] Determine the initial vacuuming time;

[0087] The step of activating the vacuum device to evacuate the vacuum bag includes:

[0088] The vacuum device is activated to evacuate the vacuum bag according to the initial vacuuming time.

[0089] It should be noted that before determining the total time required for vacuuming, the vacuum device can be controlled to pump air according to the initial vacuuming time. After the total time required for vacuuming is determined, the determined total time required for vacuuming is then used to replace the initial vacuuming time for subsequent control of the vacuum device.

[0090] In one example, the initial vacuuming time can be preset by the user.

[0091] In yet another example, determining the initial vacuuming time may include the following steps (1)-(8):

[0092] (1) The system default or manual selection of the suction constant b;

[0093] (2) After the packaging bag is placed into the vacuum chamber, control the door to seal the vacuum chamber;

[0094] (3) Start the vacuum pump unit and start timing. When the vacuum level in the vacuum chamber drops to the first preset vacuum level P1, 1 Record time node t1;

[0095] (4) Keep the vacuum pump unit continuously pumping. When the vacuum level in the vacuum chamber is detected to drop to the second preset vacuum level, continue pumping. Record time node t2;

[0096] (5) Substitute t1 and t2 into the formula Δt=t2-t1 to calculate the time difference Δt;

[0097] (6) The initial total pumping time T0 or the vacuum level at the end of pumping is obtained from Δt and b.

[0098] (7) Substitute Δt and b into the formula T0=Δt*K+b to calculate the initial suction duration T0, where K is an empirical coefficient;

[0099] (8) Set the total evacuation time of the vacuum pump group to T0 as the initial evacuation time.

[0100] Secondly, see Figure 2 The diagram shows a schematic of the structure of a vacuum device provided in an embodiment of this application. The vacuum device 200 includes:

[0101] Vacuum chamber 201; and,

[0102] Controller 202 is configured to perform any of the methods described above.

[0103] In one example, the controller 202 may include a microcontroller.

[0104] In summary, the embodiments of this application have at least the following beneficial effects:

[0105] In this embodiment, after a vacuum bag is placed into the vacuum chamber, the vacuum device is activated to evacuate the vacuum bag. The vacuum bag contains an object to be evacuated, which may include hot liquid and / or food containing liquid. The real-time temperature of the object to be evacuated is obtained. Based on the real-time temperature, a target vacuum level is determined. Based on the target vacuum level, the total time required for evacuation is determined. The vacuum level inside the vacuum chamber is determined. Based on a comparison between the vacuum level inside the chamber and the target vacuum level, and a comparison between the total time required for evacuation and the cumulative evacuation time, the vacuum device is controlled. This reduces the low-pressure boiling phenomenon that occurs when liquid food is present during evacuation and minimizes the leakage of liquid into the vacuum chamber.

[0106] Through the above description of the embodiments, those skilled in the art can clearly understand that this application can be implemented by means of software plus necessary hardware platforms, or it can be implemented entirely by hardware. Based on this understanding, all or part of the technical solutions of this application that contribute to the background technology can be embodied in the form of a software product. This computer software product can be stored in a storage medium, such as ROM (Read-Only Memory) / RAM (Random Access Memory), magnetic disk, optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in various embodiments or some parts of the embodiments of this application.

[0107] The above description is the preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications are also considered to be within the scope of protection of this application.

Claims

1. A method for controlling the vacuum packaging of hot liquids or foods containing liquids, characterized in that, The method for controlling a vacuum device having a vacuum cavity includes: After the vacuum bag is placed into the vacuum chamber, the vacuum device is activated to evacuate the vacuum bag, wherein the vacuum bag contains an object to be vacuumed, the object to be vacuumed including hot liquid and / or food containing liquid. Obtain the real-time temperature of the object to be vacuumed; The target vacuum level is determined based on the real-time temperature. Based on the target vacuum level, determine the total time required for vacuuming; Determine the vacuum level inside the vacuum chamber; The vacuum device is controlled based on the comparison between the vacuum level inside the cavity and the target vacuum level, and the comparison between the total time required for evacuation and the cumulative evacuation time. The step of controlling the vacuum device based on the comparison between the vacuum level inside the cavity and the target vacuum level, and the comparison between the total time required for vacuuming and the cumulative pumping time, includes: when the vacuum level inside the cavity is equal to the target vacuum level, if the total time required for vacuuming is equal to the cumulative pumping time, then controlling the vacuum device to stop pumping; otherwise, returning to the step of obtaining the real-time temperature of the object to be vacuumed. The method further includes: Each time the step of obtaining the real-time temperature of the object to be vacuumed is returned, the number of cycles is accumulated once. And every R cycles, if the vacuum device has not stopped pumping and the preset conditions are met, the pumping power of the vacuum device is reduced by a set ratio, thereby reducing the speed of the vacuum pump motor of the vacuum device and controlling the pumping time, where R is a positive integer.

2. The method according to claim 1, characterized in that, The real-time temperature is detected by a temperature sensing component, and the vacuum level inside the cavity is detected by a pressure sensor.

3. The method according to claim 1, characterized in that, Determining the target vacuum level based on the real-time temperature includes: A first data table is determined, wherein the first data table includes multiple experimental temperatures and their respective corresponding experimental vacuum levels; The experimental vacuum degree that matches the real-time temperature is retrieved from the first data table, and the target vacuum degree is determined based on the retrieved experimental vacuum degree.

4. The method according to claim 1, characterized in that, The determination of the total time required for evacuation based on the target vacuum level includes: Determine a second data table, wherein the second data table includes multiple experimental vacuum levels and their respective corresponding times; The time matching the target vacuum level is retrieved from the second data table to determine the total time required for evacuation based on the retrieved time.

5. The method according to claim 1, characterized in that, The preset conditions include at least one of the following: The difference between the total time required for vacuuming and the cumulative pumping time is less than a set difference threshold. The ratio of the cumulative pumping time divided by the total time required for vacuuming is greater than a set ratio threshold.

6. The method according to claim 1, characterized in that, R is determined based on the information of the vacuum device and / or the information of the object to be evacuated; The set ratio is a preset fixed value, or it is determined based on the information of the vacuum device and / or the information of the object to be vacuumed.

7. The method according to any one of claims 1-6, characterized in that, Before activating the vacuum device to evacuate the vacuum bag, the method further includes: Determine the initial vacuuming time; The step of activating the vacuum device to evacuate the vacuum bag includes: The vacuum device is activated to evacuate the vacuum bag according to the initial vacuuming time.

8. A vacuum device, characterized in that, include: Vacuum cavity; as well as, The controller is configured to perform the method according to any one of claims 1-7.

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