JP2018122859A - Vacuum packaging device and method of vacuum packaging - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum packaging device and a method of vacuum packaging which enable sufficient de-gassing inside a packaging bag even if a packaged item contains fluid.SOLUTION: In a state of a packaging bag being placed in a chamber, with a fluid containing item packaged and an opening of the bag closed by a closing device, a decompression process DP, which inflates the packaging bag in the chamber decompressed by a deaerator, and a stopping decompression process SP, which stops the decompression process by the deaerator and releases the opening from its closed status by the closing device, are alternatively and repeatedly applied.SELECTED DRAWING: Figure 3

Description

  In the present invention, the inside of the chamber is degassed by depressurizing the inside of the packaging bag in a state in which the packaging bag for containing the packaged item is housed, and the package entry port of the packaging bag is closed in this state, The present invention relates to a vacuum packaging apparatus and a vacuum packaging method for sealing a package input port and vacuum packaging an object to be packaged.

  Conventionally, vacuum packaging is known as one of packaging methods for packaging an object to be packaged such as food. In vacuum packaging, the packaging bag containing the packaged goods is stored in the chamber of the vacuum packaging device, the inside of the packaging bag is deaerated by depressurizing the inside of the chamber, and in this state, the packaging material input port of the packaging bag is opened. The sealing is performed by heat sealing or the like.

  In addition, the package to be vacuum packaged contains liquids that are hotter than room temperature, for example, soup, curry, boiled foods containing boiled juice, foods soaked in heated oil, etc. If it is a warm dish, depressurize the chamber without closing the package entry port and deaerate the packaging bag, and then close the package entry port to prevent liquid spilling. Has been proposed. Further, it has been proposed to detect the boiling of the liquid by detecting the expansion of the packaging bag whose packaging object inlet is closed, and to stop the decompression in the chamber before boiling too much (for example, Patent Documents). 1).

Japanese Patent No. 5575827

  By the way, even if air remains in the packaging bag in which the package input port is closed, the packaging bag can expand in the chamber under reduced pressure, so that the deaeration in the packaging bag is insufficient. There is a possibility that the vacuum packaging device stops the decompression in the chamber and further seals the packaging bag.

  The present invention has been made in view of the above-described circumstances, and the purpose thereof is a vacuum packaging apparatus that can sufficiently deaerate the inside of a packaging bag without any trouble even if liquids are contained in an article to be packaged. And a vacuum packaging method.

The present invention has been proposed in order to achieve the above-mentioned object. According to the first aspect of the present invention, there is provided a chamber containing a packaging bag containing a packaged article containing a liquid, and an inside of the chamber. A deaeration device that degasses the inside of the packaging bag by depressurization, a closing device that is provided in the chamber and closes the packaging material inlet of the packaging bag, and a closed packaging material inlet is sealed. A vacuum packaging device comprising: a sealing device to perform, a deaeration device, a charging port closing device, and a control device for controlling the sealing device,
The controller is
In a state where a packaging bag containing a packaged product containing liquid and having a packaged product input port closed by the input port closing device is accommodated in the chamber, the chamber is decompressed by the deaeration device. A decompression step for inflating the packaging bag;
A depressurization stop step for stopping depressurization in the chamber by the degassing device and opening the package input port by releasing the closed state by the input port closing device;
In a state where the inside of the chamber is decompressed, a sealing step of closing the package input port by the input port closing device and sealing the package input port in the closed state by the sealing device;
After the sealing step, the atmospheric release step of opening the reduced pressure chamber to the atmospheric pressure to return to atmospheric pressure,
Control to execute
The vacuum packaging apparatus is configured to repeatedly execute the decompression step and the decompression stop step.

According to a second aspect of the present invention, there is provided a chamber for storing a packaging bag containing an article to be packaged containing a liquid, a deaeration device for degassing the inside of the packaging bag by depressurizing the inside of the chamber, An inlet closing device for closing the package input port of the packaging bag, a sealing device for sealing the package input port in the closed state, and an expansion capable of detecting the expansion of the packaging bag in the chamber A vacuum packaging device comprising: a detection means; and a control device for controlling expansion of the packaging bag detected by the expansion detection means while controlling the deaeration device, the inlet closing device, and the sealing device,
The controller is
In a state where a packaging bag containing a packaged product containing liquid and having a packaged product input port closed by the input port closing device is accommodated in the chamber, the chamber is decompressed by the deaeration device. A decompression step for inflating the packaging bag;
A depressurization stop step for stopping depressurization in the chamber by the degassing device and opening the package input port by releasing the closed state by the input port closing device;
In a state where the inside of the chamber is decompressed, a sealing step of closing the package input port by the input port closing device and sealing the package input port in the closed state by the sealing device;
After the sealing step, the atmospheric release step of opening the reduced pressure chamber to the atmospheric pressure to return to atmospheric pressure,
Control to execute
In the depressurization step, based on the detection result of the expansion of the packaging bag by the expansion detection means, the depressurization step is terminated and the depressurization stop step, the sealing step, the atmosphere release step is performed, or the depressurization step is performed. The vacuum packaging apparatus is characterized in that the decompression process is re-executed after completion of the decompression stop process.

According to a third aspect of the present invention, in the decompression step, a decompression re-execution determination process is performed to determine whether or not the decompression step needs to be re-executed based on a detection result of the expansion of the packaging bag by the expansion detection means.
When it is determined that the re-execution of the decompression process is unnecessary, the decompression process is terminated and a decompression stop process, a sealing process, and an atmosphere release process are performed,
When it is determined that the decompression process needs to be re-executed, the decompression process and the decompression re-execution determination process are performed again after the decompression process is finished and the decompression stop process is performed. Item 3. The vacuum packaging device according to Item 2.

The thing of Claim 4 is equipped with the atmospheric pressure detection means to detect the atmospheric pressure in the chamber,
The control device can calculate the pressure fluctuation value in the chamber generated from the start of the decompression process to the detection of the expansion of the packaging bag by the expansion detection means from the atmospheric pressure detected by the atmospheric pressure detection means, and the decompression process The time required for the expansion that has elapsed from the start of the detection until the detection of the expansion of the packaging bag by the expansion detection means can be measured,
In the decompression re-execution determination process, when at least one of the atmospheric pressure fluctuation value is smaller than the decompression re-execution determination fluctuation reference value or the expansion required time is shorter than the decompression re-execution determination reference time is established. The vacuum packaging device according to claim 3, wherein it is determined that the re-execution of the decompression step is unnecessary.

The thing of Claim 5 is equipped with the atmospheric pressure detection means to detect the atmospheric pressure in the chamber,
The control device can calculate the pressure fluctuation value in the chamber generated from the start of the decompression step to the detection of the expansion of the packaging bag by the expansion detection means from the pressure detected by the pressure detection means,
The pressure reduction re-execution determination process determines that re-execution of the pressure reduction process is unnecessary when the pressure fluctuation value is smaller than the pressure reduction re-execution determination reference value. It is a vacuum packaging device.

According to a sixth aspect of the present invention, the control device is capable of measuring the time required for expansion that has elapsed between the start of the decompression step and the detection of expansion of the packaging bag by the expansion detection means.
4. The vacuum according to claim 3, wherein, in the decompression re-execution determination process, it is determined that the re-execution of the decompression step is unnecessary when the required expansion time is shorter than the decompression re-execution determination reference time. It is a packaging device.

  According to a seventh aspect of the present invention, the expansion detection means detects a expansion of the packaging bag by detecting a bag contact portion that contacts the packaging bag and a change in the posture of the bag contact portion. The vacuum packaging device according to any one of claims 2 to 6, further comprising:

According to the eighth aspect of the present invention, the chamber is decompressed by depressurizing the inside of the packaging bag in a state in which the packaging bag for storing the packaged material containing the liquid is contained, and the packaging bag is packaged in this state. In the vacuum packaging method of closing the product input port, sealing the closed product input port, and vacuum packaging the product to be packaged,
In a state where the packaging object containing the liquid is stored and the packaging bag in which the packaging object inlet is closed is housed in the chamber, the decompression step of expanding the packaging bag by decompressing the inside of the chamber;
A depressurization stop step for stopping the depressurization in the chamber and opening the closed package input port;
A sealing step of closing the package input port in a state where the inside of the chamber is decompressed, and sealing the package input port in a closed state;
After the sealing step, the atmospheric release step of opening the reduced pressure chamber to the atmospheric pressure to return to atmospheric pressure,
Run
In the vacuum packaging method, the decompression step and the decompression stop step are repeatedly executed.

According to the ninth aspect of the present invention, the chamber is depressurized by depressurizing the inside of the packaging bag in a state in which the packaging bag containing the packaged product containing the liquid is accommodated, and the packaging bag is packaged in this state. In the vacuum packaging method of closing the product input port, sealing the closed product input port, and vacuum packaging the product to be packaged,
In a state where the packaging object containing the liquid is stored and the packaging bag in which the packaging object inlet is closed is housed in the chamber, the decompression step of expanding the packaging bag by decompressing the inside of the chamber;
A depressurization stop step for stopping the depressurization in the chamber and opening the closed package input port;
A sealing step of closing the package input port in a state where the inside of the chamber is decompressed, and sealing the package input port in a closed state;
After the sealing step, the atmospheric release step of opening the reduced pressure chamber to the atmospheric pressure to return to atmospheric pressure,
Run
In the depressurization step, based on the detection result of the expansion of the packaging bag, the depressurization step is terminated and the depressurization stop step, the sealing step, and the air release step are performed, or the depressurization step is terminated and the depressurization step is performed. The vacuum packaging method is characterized in that the decompression step is re-executed after the stop step.

According to a tenth aspect of the present invention, in the decompression step, a decompression re-execution determination process for determining the necessity of re-execution of the decompression step based on a detection result of expansion of the packaging bag is performed,
When it is determined that the re-execution of the decompression process is unnecessary, the decompression process is terminated and a decompression stop process, a sealing process, and an atmosphere release process are performed,
When it is determined that the decompression process needs to be re-executed, the decompression process and the decompression re-execution determination process are performed again after the decompression process is finished and the decompression stop process is performed. Item 10. The vacuum packaging method according to Item 9.

The method according to claim 11 calculates a pressure fluctuation value in the chamber generated between the start of the decompression step and the detection of expansion of the packaging bag,
The time required for the expansion that has elapsed between the start of the decompression step and the detection of the expansion of the packaging bag,
In the decompression re-execution determination process, when at least one of the atmospheric pressure fluctuation value is smaller than the decompression re-execution determination fluctuation reference value or the expansion required time is shorter than the decompression re-execution determination reference time is established. The vacuum packaging method according to claim 10, wherein it is determined that re-execution of the decompression step is unnecessary.

The method according to claim 12 calculates a pressure fluctuation value in the chamber generated between the start of the pressure reducing step and the detection of the expansion of the packaging bag,
The pressure reduction re-execution determination process determines that re-execution of the pressure reduction process is unnecessary when the pressure fluctuation value is smaller than a pressure reduction re-execution determination reference value. This is a vacuum packaging method.

The thing of Claim 13 time-measures the expansion required time which passed from the start of the said pressure reduction process to the detection of expansion | swelling of a packaging bag,
11. The vacuum according to claim 10, wherein in the decompression re-execution determination process, it is determined that the re-execution of the decompression process is unnecessary when the required expansion time is shorter than the decompression re-execution determination reference time. Packaging method.

According to the present invention, the following excellent effects can be obtained.
According to the first and second and eighth and ninth aspects of the present invention, even if liquid is contained in the package, the inside of the packaging bag can be sufficiently deaerated without hindrance.

According to the invention of Claim 3 and Claim 10, it can be grasped | ascertained easily whether the air in a packaging bag was expelled outward. Moreover, even if the pressure in the chamber is reduced to a pressure at which the liquid boils and the inside of the packaging bag is sufficiently degassed, the inconvenience that the boiling liquid is blown out of the packaging bag is prevented by closing the input port for the package. It is possible to avoid the package entry port from being contaminated with liquid. Therefore, even if liquids are contained in the package, the inside of the packaging bag can be sufficiently degassed without any trouble, and as a result, it is difficult for bubbles to remain in the packaging bag after vacuum packaging. It can be performed.
Note that “boiling” in the present invention is a phenomenon in which the temperature of the liquid reaches the boiling point and the liquid is vaporized from the inside. In a liquid having a high viscosity such as curry roux or potage soup, air contained in the liquid It also includes the phenomenon that the water level expands due to temperature change or pressure change, and the liquid level fluctuates with this expansion.

  According to the inventions of claims 4 to 6 and claims 11 to 13, sufficient deaeration in the packaging bag can be grasped without detecting the temperature of the liquid in the packaging bag. . Therefore, the vacuum packaging can be performed satisfactorily regardless of the temperature change of the article to be packaged and the temperature change of the environment in which the vacuum packaging operation is performed.

  According to the seventh aspect of the present invention, it is possible to detect the expansion of the packaging bag with a simple configuration.

It is the schematic of a vacuum packaging apparatus. It is a block diagram which shows the control system of a vacuum packaging apparatus. It is a graph which shows the time-dependent change of the atmospheric pressure in a chamber. It is the schematic of the vacuum packaging apparatus in the decompression process of the 1st time. It is the schematic of the vacuum packaging apparatus of the state which the packaging bag expanded in the decompression process of the 1st time. It is the schematic of the vacuum packaging apparatus in the decompression stop process of the 1st time. It is the schematic of the vacuum packaging apparatus in the decompression process of the 2nd time. It is the schematic of the vacuum packaging apparatus of the state which the packaging bag expanded in the decompression process of the 2nd time. It is the schematic of the vacuum packaging apparatus in the decompression stop process of the 2nd time. It is the schematic of the vacuum packaging apparatus in the decompression process of the 3rd time. It is the schematic of the vacuum packaging apparatus of the state which the packaging bag expanded in the decompression process of the 3rd time. It is the schematic of the vacuum packaging apparatus in the decompression stop process of the 3rd time. It is the schematic of the vacuum packaging apparatus in a sealing process. It is the schematic of the vacuum packaging apparatus in an air release process.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the vacuum packaging apparatus 1 includes a chamber 2 that houses a packaging bag B that contains an object to be packaged, and a degassing that depressurizes the inside of the chamber 2 to degas the packaging bag B. A gas inlet device 3, an inlet closing device 5 provided inside the chamber 2, for closing the package input port Ba of the packaging bag B, and a sealing heater for sealing the package input port Ba of the packaging bag B 6 (corresponding to the sealing device in the present invention), a bag expansion detecting device 7 (corresponding to the expansion detecting means in the present invention) capable of detecting expansion of the packaging bag B in the chamber 2, a deaeration device 3 and an inlet A control device 8 for controlling the closing device 5 and the sealing heater 6 is provided.

  The chamber 2 is a pressure-resistant container composed of a main body portion 2a on which the packaging bag B can be placed and a lid portion 2b that closes the main body portion 2a from above, and the lid portion 2b is rotated in the vertical direction. Thus, it can be opened and closed, and a sealing material (not shown) is provided at the contact portion between the lid 2b and the main body 2a so that the airtightness in the chamber 2 can be maintained. Further, a suction port 9 is formed in the main body 2a and connected to the deaeration device 3. When the deaeration device 3 is driven, the air in the chamber 2 is sucked from the suction port 9 and the pressure in the chamber 2 is reduced. It is configured as follows.

  The inlet closing device 5 is in a state in which a lower closing block 10 provided so as to be movable up and down on the main body 2a side and an upper closing block 11 fixed on the lower surface side of the lid 2b face each other. The lower closing block 10 can be moved up and down by driving the closing cylinder 12, and the packaging bag B is sandwiched between the upper closing block 11 and the lower closing block 10 in the raised state to be packaged. The inlet Ba is configured to be closed. Further, the closing cylinder 12 and the deaeration device 3 are connected by an inlet closing drive flow path 13, and the inlet closing drive flow path 13 has an inlet closing electromagnetic valve constituted by a three-way valve. One of the 14 connection ports is connected, one of the remaining connection ports is connected to a part of the deaeration device 3, and the other is opened to the atmosphere. When the closing cylinder 12 and the deaeration device 3 are communicated with each other by operating the charging port closing electromagnetic valve 14, the closing cylinder 12 is sucked by the deaeration device 3. 12 raises the lower closing block 10 and presses against the upper closing block 11 (see FIG. 4). When the inside of the closing cylinder 12 is opened to the atmosphere, the closing cylinder 12 is moved to the lower closing block. 10 is configured to be spaced downward from the upper closing block 11 (see FIG. 6). Further, the upper closing block 11 side (upper part) and the lower closing block 10 side (lower part) of the upper closing block 11 are respectively provided with sealing heaters 6, and the upper closing block 11. When the sealing heater 6 is energized with the packaging bag B sandwiched between the lower closing block 10 and the lower closing block 10, the package input port Ba is closed and thermocompression-bonded and sealed. Has been.

  Further, the bag holding surface (upper surface) of the lower closing block 10 and the bag holding surface (lower surface) of the upper closing block 11 are heat-resistant and adhesive gel-like sheets (for example, silicon rubber sheets). A bag adhering portion 15 is provided, the bag adhering portion 15 is adhered to the surface of the packaging bag B, and the insufflation port Ba of the packaging bag B in the sandwiched state shifts, and thus the sandwiched state. The packaging bag B is configured to prevent inconvenience that the packaging bag B comes out between the upper closing block 11 and the lower closing block 10. Note that the bag adhering portion 15 is displaced from the sealing heater 6 (specifically, displaced from the sealing heater 6 toward the rotation center side (right side in FIG. 1) of the lid portion 2b). Has been placed.

  The deaeration device 3 includes a vacuum pump 16 and an intake passage 18 that connects the vacuum pump 16 and the chamber 2 in a state where they can communicate with each other. A vacuum electromagnetic valve (vacuum valve) 19 that allows or closes communication between the pump 16 and the chamber 2 is provided. Further, a closed branch port 25 is provided at a position located between the vacuum electromagnetic valve 19 and the vacuum pump 16 in the intake flow path 18, and the inlet closing solenoid valve 14 is connected to the closed branch port 25. One of the mouths is connected. Further, a vacuum release branch port 26 is provided at a location located between the vacuum electromagnetic valve 19 and the chamber 2 in the intake flow path 18, and a vacuum release valve (outside air introduction valve) 27 is connected to the vacuum release valve 27. Is opened, and the inside of the chamber 2 can be returned from the reduced pressure state to the atmospheric pressure (can be opened to the atmosphere).

  The bag expansion detection device 7 includes a flat bag contact portion 31 positioned above the packaging bag B placed on the main body 2a, and a change in the posture of the bag contact portion 31. And an expansion detection sensor 32 capable of detecting the expansion state. Then, the end portion (left end portion in FIG. 1) of the bag contact portion 31 on the inlet opening closing device 5 side is pivotally attached to the side portion of the upper closing block 11 so as to be rotatable, and the lid portion 2b The free end portion (right end portion in FIG. 1) located on the axis attachment side moves up and down (moves in the vertical direction), and the free end portion is located on the lid portion 2b side (the inclined posture shown in FIG. 5) ) And a lowered posture (normal posture shown in FIG. 1) located on the main body 2a side.

  Further, a stopper 31a for preventing the free end from coming into contact with the main body 2a is extended at the free end of the bag contact 31 so as to extend toward the lower main body 2a. In the state where 31 is in the lowered posture, the stopper 31a is configured to contact the upper surface of the main body 2a and prevent the bag contact portion 31 from rotating downward. Further, a detection piece 31b is provided at the lower end of the stopper 31a, and a downward posture is provided on the opposite side of the main body 2a with respect to the stopper 31a (the lower surface side of the main body 2a in FIG. 1). Is provided with an expansion detection sensor 32 capable of detecting the detection piece 31b of the bag abutting portion 31, and the detection signal of the expansion detection sensor 32 can be transmitted to the control device 8 (see FIG. 2). In the present embodiment, the expansion detection sensor 32 is formed of a magnetic sensor, the detection piece 31b is formed of a magnetic material, and the expansion detection sensor 32 senses the strength of a magnetic field that changes as the detection piece 31b approaches. The posture change of the bag contact portion 31 can be detected.

  As shown in FIG. 2, the control device 8 includes a one-chip microcomputer 40 that controls the vacuum packaging device 1, an interface circuit 41 that performs input / output processing of each signal, and the like. The interface circuit 41 includes a power switch 42 provided on an operation panel (not shown) of the vacuum packaging apparatus 1, various operation switches such as a pressure and time setting switch 43, and an atmospheric pressure for detecting the atmospheric pressure in the chamber 2. Signals are input from a detection sensor 44 (corresponding to atmospheric pressure detection means in the present invention), a lid open / close detection sensor 45 that detects the open / close state of the lid 2b, and an expansion detection sensor 32 of the bag expansion detection device 7. From the interface circuit 41, the vacuum pump 16, the vacuum solenoid valve 19, the inlet closing solenoid valve 14, the vacuum release valve 27, the seal heater 6, the buzzer 46 for generating various notification sounds, and the display for displaying various states. A control signal is output to the device 47.

  Next, in the vacuum packaging apparatus 1 having the above-described configuration, a procedure for vacuum packaging an article to be packaged containing a liquid will be described. In the state before starting the vacuum packaging (normal state), the vacuum pump 16 is not driven, all the connection ports of the vacuum solenoid valve 19 and the inlet closing solenoid valve 14 are closed, and the vacuum release valve 27 is opened. And Further, the inside of the closing port drive path 13 and the closing cylinder 12 is not depressurized, and the lower closing block 10 is lowered. Further, the control device 8 is used for determination of boiling of the liquid in the packaging bag B (boiling determination processing (corresponding to the decompression re-execution determination processing in the present invention)) in the decompression steps DP1 to DP3 (see FIG. 3) described later. Reference values (boiling determination reference time bt, boiling determination fluctuation reference value bp) are stored. The boiling judgment reference time bt (corresponding to the decompression re-execution judgment reference time in the present invention) is when the packaging bag B in a closed state is expanded by depressurizing the inside of the chamber 2 and boiling the liquid in the packaging bag B. This is the assumed required time estimated from the start of decompression to the detection of the expansion of the packaging bag B by the bag expansion detection device 7. Also, the boiling determination fluctuation reference value bp (corresponding to the pressure reduction re-execution determination fluctuation reference value in the present invention) is expanded in the closed packaging bag B when the pressure in the chamber 2 is reduced and the liquid in the packaging bag B is boiled. In this case, it is an assumed atmospheric pressure fluctuation value in the chamber 2 that is estimated to occur between the start of decompression and the detection of the expansion of the packaging bag B by the bag expansion detection device 7. Note that “boiling” in the present invention is a phenomenon in which the temperature of the liquid reaches the boiling point and the liquid is vaporized from the inside. In a liquid having a high viscosity such as curry roux or potage soup, air contained in the liquid It also includes the phenomenon that the water level expands due to temperature change or pressure change, and the liquid level fluctuates with this expansion.

  First, the setting process (preparation process) which sets the packaging bag B containing the to-be-packaged item in the chamber 2 is performed. In the setting process, the operator places the packaging bag B on the main body 2a and places the package input port Ba on the lower closing block 10 with the lid 2b opened. When the lid 2b is closed by hand after setting the packaging bag B, the lid open / close detection sensor 45 detects the closed state of the lid 2b and sends a signal to the control device 8.

  If the control device 8 receives the detection signal of the closed state of the lid 2b, the process proceeds to the pressure reducing process DP1. In the decompression process DP1, the control device 8 controls the closing operation of the package input port Ba and the decompression operation in the chamber 2. Specifically, among the inlet closing solenoid valve 14, the connection opening on the atmosphere opening side is closed and the connection opening on the closing opening driving flow path 13 side and the connection opening on the closing branch port 25 side are opened. When the operation of the inlet closing solenoid valve 14 is completed, the lower closing block 10 is raised by driving the vacuum pump 16 and sucking the inside of the closing cylinder 12, and the upper closing block 11. The packaging bag B is held between the lower closing block 10 and the package input port Ba is closed. Further, the vacuum electromagnetic valve 19 is opened and the vacuum release valve 27 is closed to allow the driven vacuum pump 16 and the chamber 2 to communicate with each other, so that the deaeration device 3 starts to depressurize the chamber 2. When the pressure in the chamber 2 is reduced, the packaging bag B expands based on the difference between the pressure in the chamber 2 and the pressure of the air trapped in the packaging bag B. The control device 8 in the decompression step DP1 starts measuring the elapsed time from the start of the decompression step DP1, and detects the atmospheric pressure in the chamber 2 at the start of the decompression step DP1 from the atmospheric pressure detection sensor 44. Acquire and store based on the signal.

  As shown in FIG. 5, when the packaging bag B is sufficiently inflated, the bag contact portion 31 is pushed up by the packaging bag B and converted from the lowered posture to the raised posture, and the expansion detection sensor 32 is moved to the bag contact portion 31. The movement of the detection piece 31b (specifically, the distance from the expansion detection sensor 32) is detected, and a detection signal is transmitted to the control device 8. Upon receiving this detection signal (in other words, a detection signal indicating that the expansion of the packaging bag B has been detected), the control device 8 boiles the liquid (the liquid in the packaging bag B) based on the detection result of the expansion of the packaging bag B. A boiling determination process (in other words, a decompression re-execution determination process for determining whether or not the decompression process needs to be performed again) is executed.

  More specifically, the control device 8 occurs between the start of the pressure reduction process DP1 and the detection of expansion of the packaging bag B by the bag expansion detection device 7 (in other words, reception of a detection signal from the expansion detection sensor 32). The atmospheric pressure fluctuation value Δp1 in the chamber 2 is calculated from the detection signal from the atmospheric pressure detection sensor 44 (atmospheric pressure detected by the atmospheric pressure detection sensor 44), and further from the start of the decompression step DP1, The elapsed time measured until the detection of the expansion is acquired as the required expansion time Δt1 (see FIG. 3). Then, the boiling determination fluctuation reference value bp set in advance (stored in the control device 8) and the atmospheric pressure fluctuation value Δp1 are compared before starting the vacuum packaging, and set in advance (in the control device 8) before starting the vacuum packaging. The boiling determination reference time bt stored in (1) is compared with the required expansion time Δt1. As a result of executing these comparisons, if at least one of the atmospheric pressure fluctuation value Δp1 is smaller than the boiling judgment fluctuation reference value bp or the expansion required time Δt1 is shorter than the boiling judgment reference time bt is established. In the case where it is determined that the liquid has boiled in the packaging bag B and none of them is established, the liquid does not boil in the packaging bag B, and the expansion of the air trapped in the packaging bag B (in other words, It is determined that the packaging bag B is inflated by the pressure difference between the air in the packaging bag B and the air in the chamber 2. These determinations are set on the basis that the expansion speed of the packaging bag B varies depending on whether or not the liquid is generated in the packaging bag B. That is, when the liquid boils in the packaging bag B, the packaging bag B expands not only due to the increase in volume due to the expansion of air in the packaging bag B, but also due to the increase in volume due to the vaporization of the liquid, This is based on the fact that the expansion rate of the packaging bag B is increased due to the additional generation of liquid vaporization. Note that the conditions for establishing the boiling determination include at least one of the atmospheric pressure fluctuation value Δp1 and the boiling determination fluctuation reference value bp being equal, or the expansion required time Δt1 and the boiling determination reference time bt being equal. Also good.

  When it is determined that the liquid has boiled in the packaging bag B as a result of performing the boiling determination process, the control device 8 ends the decompression step DP1 currently being executed, stops the decompression in the chamber 2, and Decompression stop step SP (see FIGS. 3 and 6) for opening the package input port Ba, sealing step (see FIG. 13) for sealing the opened package input port Ba, and the sealing step Thereafter, an atmosphere release step (see FIG. 14) for releasing the inside of the chamber 2 to the atmosphere is performed. On the other hand, if it is determined that the liquid is not boiling in the packaging bag B, the decompression process DP1 currently being executed is terminated, and after the decompression stop process SP1 is performed, the decompression process (second decompression process DP2) and Re-execute the boiling judgment process. In the present embodiment shown in FIGS. 3 to 14, it is determined that the liquid is not boiling in the packaging bag B in the first decompression step DP1 and the second decompression step DP2. In the second decompression step DP3, it is determined that the liquid has boiled in the packaging bag B.

  More specifically, as shown in FIG. 5, when the expansion of the packaging bag B is detected by the bag expansion detection device 7, the control device is based on the detection signal received from the bag expansion detection device 7 (expansion detection sensor 32). 8 performs a boiling determination process. As a result, it was confirmed that neither the atmospheric pressure fluctuation value Δp1 is smaller than the boiling determination fluctuation reference value bp or the expansion required time Δt1 is shorter than the boiling determination reference time bt. For this reason, the control apparatus 8 complete | finishes decompression process DP1 currently being performed, and transfers to decompression stop process SP1. In the decompression stop step SP1, as shown in FIG. 6, the vacuum electromagnetic valve 19 is closed and the vacuum release valve 27 is kept closed, and the progress of decompression in the chamber 2 by the deaeration device 3 is stopped to Maintain vacuum. Further, the closing port 12 side of the closing port solenoid valve 14 is closed and the atmosphere opening side connection port is opened to open the inside of the closing cylinder 12 to the lower side. The block 10 is lowered and separated from the upper closed block 11, and the package input port Ba of the inflated packaging bag B is opened in the chamber 2, in other words, the closed state of the package input port Ba is released. Then, a part of the air remaining in the packaging bag B and inflating the packaging bag B is pushed by the difference between the pressure of the air and the pressure in the chamber 2 or the weight of the bag contact portion 31. Based on the crushing, it is driven out of the package input port Ba. As a result, the inside of the packaging bag B is deaerated in the decompression stop process SP1. In addition, in the decompression stop process SP1 and the second decompression stop process SP2 and the third decompression stop process SP3 described later, before the stop of the progress of decompression in the chamber 2 is completed, the package input port Ba is opened. It may be opened. In short, in the decompression stop process SP, it is only necessary to stop the decompression in the chamber 2 and open the package input port Ba.

  When the bag contact portion 31 returns to the lowered position due to the shrinkage (release of expansion) of the packaging bag B and the detection piece is detected by the expansion detection sensor 32, the control device 8 that has received this detection signal performs the decompression stop process SP1. And the second decompression step DP2 is executed (see FIG. 7). And if the expansion | swelling of the packaging bag B is detected by the bag expansion | swelling detection apparatus 7 (refer FIG. 8), the boiling determination process in the said pressure reduction process (2nd pressure reduction process) DP2 will be performed. As a result of the boiling determination process, the pressure fluctuation value (specifically, the pressure fluctuation in the chamber 2 generated between the start of the pressure reduction process DP2 and the detection of the expansion of the packaging bag B by the bag expansion detection device 7) also in the pressure reduction process DP2. Value) Δp2 is smaller than the boiling determination fluctuation reference value bp, or the time required for the expansion (specifically, the time from the start of the decompression step DP2 to the detection of the expansion of the packaging bag B by the bag expansion detection device 7) Since it has been confirmed that none of the elapsed time) Δt2 is shorter than the boiling judgment reference time bt, the controller 8 ends the decompression step DP2 that is currently being executed, and the decompression stop step (second decompression) The process shifts again to the stop step SP2) (see FIG. 9). Even in the second decompression stop process SP2, a part of the air remaining in the packaging bag B and inflating the packaging bag B is caused by the difference between the pressure of the air and the pressure in the chamber 2 or the bag contact portion. Based on the crushing of the packaging bag B due to its own weight, it is driven outward from the package input port Ba. As a result, the degassing in the packaging bag B is also performed in the second decompression stop process SP2.

  When the bag contact portion 31 returns to the lowered posture again by the re-shrinkage of the packaging bag B (releasing the re-expansion) and the detection piece is detected by the expansion detection sensor 32, the control device 8 that has received this detection signal is The third decompression stop process SP2 is completed, and the third decompression process DP3 is executed (see FIG. 10). And if the expansion | swelling of the packaging bag B is detected by the bag expansion | swelling detection apparatus 7 (refer FIG. 11), the boiling determination process in the said pressure reduction process (3rd pressure reduction process) DP3 will be performed. As a result of the boiling determination process, the pressure fluctuation value in the pressure reduction process DP (specifically, the pressure fluctuation in the chamber 2 generated from the start of the pressure reduction process DP3 to the detection of the expansion of the packaging bag B by the bag expansion detection device 7). Value) Δp3 is smaller than the boiling determination fluctuation reference value bp, or the time required for the expansion (specifically, the time from the start of the decompression step DP3 to the detection of the expansion of the packaging bag B by the bag expansion detection device 7) Since it has been confirmed that either the elapsed time) Δt3 is shorter than the boiling judgment reference time bt, the controller 8 finishes the decompression step (third decompression step) DP3 currently being executed, and stops decompression. The process shifts again to the step (third decompression stop step SP3) (see FIG. 12).

  In the third decompression stop process SP3, since the liquid in the packaging bag B boiled in the immediately preceding decompression process DP3, not only the air remaining in the packaging bag B and expanding the packaging bag B but also the decompression process DP3. The gas vaporized from the liquid due to boiling in FIG. 2 is also based on the difference between the pressure in the packaging bag B and the pressure in the chamber 2 and the crushing of the packaging bag B due to the weight of the bag contact portion 31. Will be expelled from the outside. Furthermore, since the boiling of the liquid continues even if the decompression is stopped, the gas vaporized during the decompression stop process SP3 easily drives the residual air in the packaging bag B outward from the package input port Ba. Become. As a result, in the decompression stop step SP3 after the liquid has boiled, the inside of the packaging bag B can be sufficiently deaerated.

  In the decompression stop step (in this embodiment, the third decompression stop step SP3) after it is determined that the liquid has boiled, the bag contact portion 31 returns to the lowered posture due to the shrinkage (release of expansion) of the packaging bag B. When the detection piece is detected by the expansion detection sensor 32, the control device 8 that has received the detection signal ends the decompression stop process SP3 and executes the sealing process. In the sealing step, as shown in FIG. 13, the vacuum release valve 27 and the vacuum electromagnetic valve 19 are kept closed, and the decompressed state in the chamber 2 is maintained. In addition, in the closing port solenoid valve 14, the connection port on the closing port driving flow path 13 side is kept open, the connection port on the atmosphere opening side is closed, and the connection port on the closing branch port 25 side is closed. And the lower closing block 10 is raised again by sucking the inside of the closing cylinder 12, and the packaging bag B is sandwiched between the upper closing block 11 and the lower closing block 10. The package inlet Ba is closed again. If the package input port Ba is closed again, the sealing heater 6 is energized in this state to heat the package input port Ba in a closed state and heat seal (seal). When the heat sealing of the package input port Ba is completed, the energization of the sealing heater 6 is stopped, and the clamping state by the input port closing device 5 is maintained until the cooling time of the package input port Ba elapses. .

  And after progress of cooling time, the control apparatus 8 complete | finishes a sealing process, and performs an air release process. In the atmosphere release process, as shown in FIG. 14, the connection port on the closed branch port 25 side of the solenoid valve 14 for closing the inlet is closed and the connection port on the atmosphere release side is opened to close the inside of the closing cylinder 12. Is released to the atmosphere, and the lower closed block 10 is lowered and separated from the upper closed block 11 to release the sealed packaging bag B from being clamped. Further, the vacuum release valve 27 is opened to return the inside of the chamber 2 to the atmospheric pressure, the drive of the vacuum pump 16 is stopped, and a notification sound is generated from the buzzer 46 to notify the end of the vacuum packaging. Even if air bubbles are generated in the packaging bag B immediately after the vacuum packaging is completed, most of the air bubbles are not residual air but vaporized liquid contained in the package. Therefore, when the article to be packaged is cooled to room temperature, the bubbles are condensed in the packaging bag B and returned to the liquid. As a result, even if it is an article to be packaged containing a liquid, it is possible to obtain a good vacuum packaging with almost no bubbles.

  In the vacuum packaging performed in this way, when it is determined that the liquid in the packaging bag B has not boiled (in other words, it is necessary to re-execute the decompression step) as a result of decompressing the inside of the chamber 2. Performs decompression in the chamber 2 again, and if it is determined that the liquid has boiled (in other words, it is not necessary to perform the decompression process again), the packaging bag is not performed without performing the decompression in the chamber 2 again. Since B is sealed and the vacuum packaging is completed, the air in the packaging bag B can be expelled outward by the gas generated by vaporization of the liquid by boiling, and the packaging bag B is sufficiently deaerated. Can do. Therefore, it is possible to perform good vacuum packaging that hardly contains residual air (in other words, there are almost no bubbles). Further, since it is determined whether or not the liquid has boiled (whether re-execution of the decompression step is necessary) based on the detection result of the expansion of the packaging bag B by the bag expansion detection device 7, It can be easily grasped that the liquid has boiled, and further that the air in the packaging bag B has been driven out by the boiling of the liquid.

  Moreover, since the to-be-packaged object inlet Ba is closed by the inlet closing device 5 during execution of the decompression steps DP1 to DP3, the inside of the packaging bag B is sufficiently reduced by reducing the pressure in the chamber 2 to a pressure at which the liquid boils. Even if the gas is deaerated, the inconvenience that the boiling liquid blows out from the packaging bag B can be prevented by closing the package input port Ba, and the package input port Ba is contaminated with liquid. Can be avoided. Therefore, even if liquids are included in the package, the inside of the packaging bag B can be sufficiently degassed without any trouble, and it is difficult for bubbles to remain in the packaging bag B after vacuum packaging. Vacuum packaging can be performed.

  Further, in the boiling determination process performed during the decompression steps DP1 to DP3, the pressure required for the expansion until the pressure variation values Δp1 to Δp3 in the chamber 2 are compared with the boiling determination variation reference value bp or the expansion of the packaging bag B is detected. Since the presence or absence of boiling of the liquid is determined based on the comparison between the times Δt1 to Δt3 and the boiling determination reference time bt, the boiling of the liquid can be grasped without detecting the temperature of the liquid in the packaging bag B. Therefore, the vacuum packaging can be performed satisfactorily regardless of the temperature change of the article to be packaged and the temperature change of the environment in which the vacuum packaging operation is performed. And the bag expansion | swelling detection apparatus 7 is the bag contact part 31 contact | abutted with the packaging bag B, and the expansion | swelling detection sensor 32 which can detect expansion | swelling of the packaging bag B by detecting the attitude | position change of this bag contact part 31. Therefore, the detection of the expansion of the packaging bag B can be realized with a simple configuration.

  By the way, in the pressure reduction processes DP1 to DP3 of the above embodiment, both the atmospheric pressure fluctuation values Δp1 to Δp3 and the required expansion times Δt1 to Δt3 in the chamber 2 are acquired, and these values are set as reference values (boiling). The presence / absence of boiling of the liquid (whether or not to re-execute the pressure reduction process) is determined by comparison with the determination variation reference value bp and the boiling determination reference time bt), but the present invention is not limited to this. For example, either the pressure fluctuation value in the chamber 2 or the time required for expansion is acquired, and the acquired value is compared with a reference value to determine the presence or absence of liquid boiling (necessity of re-execution of the decompression process). May be. Specifically, the controller 8 that executes the pressure reduction process DP calculates only the pressure fluctuation value Δp in the chamber 2 without measuring the expansion required time Δt as preparation for boiling determination, and in the boiling determination process, When the fluctuation value Δp is smaller than the boiling judgment fluctuation reference value bp (or when it is less than or equal to the boiling judgment fluctuation reference value bp), it is determined that the liquid has boiled, whereas when it is equal to or higher than the boiling judgment fluctuation reference value bp (or boiling) It may be set so that it is determined that the liquid has not boiled (when it is larger than the determination variation reference value bp). Alternatively, in preparation for boiling determination, only the required expansion time Δt is measured without calculating the atmospheric pressure fluctuation value Δp in the chamber 2, and in the boiling determination process, the required expansion time Δt is shorter than the boiling determination reference time bt ( If the boiling determination reference time bt or less), it is determined that the liquid has boiled. On the other hand, if the boiling determination reference time bt is longer (or longer than the boiling determination reference time bt), it is determined that the liquid is not boiling. You may set as follows.

  By the way, in the said embodiment, the bag expansion | swelling detection apparatus 7 comprised by the bag contact | abutting part 31 and the expansion | swelling detection sensor 32 is employ | adopted as an expansion | swelling detection means of this invention, and the packaging bag B is a bag opening. Although the expansion of the packaging bag B can be detected by pressing the contact portion 31, the present invention is not limited to this. In short, as long as the expansion of the packaging bag B can be detected, any configuration of expansion detection means such as an optical system in addition to the magnetic system described above may be employed. For example, when a bag monitoring camera is used as the expansion detection means to photograph the packaging bag B in the chamber 2, and the mode (size) of the packaging bag B in the decompression step DP is larger than a predetermined expansion reference mode In the case (or the case equivalent to the expansion reference mode), it may be configured such that the control device 8 detects that the packaging bag B has expanded, and the control device 8 executes the boiling determination process based on reception of this detection signal.

  When the bag monitoring camera is employed as the expansion detection means, the control device 8 may determine whether or not the liquid has boiled by comparing the pressure variation value Δp in the chamber 2 and the required expansion time Δt. Whether or not the liquid has boiled may be determined based on the detection result of the expansion of the packaging bag B by the bag monitoring camera (image in an expanded state). For example, the control device 8 has a criterion for determining a state in which the liquid has boiled in the transparent packaging bag B (color tone, brightness, etc. of an image obtained by generating bubbles in the liquid or clouding in the packaging bag B). Whether the liquid is boiling in the inflated packaging bag B by comparing the image of the transparent packaging bag B when the expansion is detected by the bag monitoring camera and the above criterion. It may be configured to determine whether or not.

  By the way, in the said embodiment, expansion | swelling determination processing is performed in the pressure_reduction | reduced_pressure process (1st pressure_reduction | reduced_pressure process) DP1 immediately after a vacuum packaging start, Based on the result of this determination, it determines whether the next pressure_reduction | reduced_pressure process DP2 is performed. However, the present invention is not limited to this. For example, immediately after the start of vacuum packaging, the decompression step DP and decompression stop step SP are alternately performed a predetermined number of times without performing the expansion determination process, and the inside of the packaging bag B is deaerated to some extent, and the decompression performed after this deaeration You may make it perform the first expansion | swelling determination processing in process DP. If the vacuum packaging operation is performed in such a setting, when the packaged object in which the liquid is difficult to boil is vacuum packaged, the unnecessary execution of the expansion determination process in the decompression step DP in the initial stage of the vacuum packaging operation is omitted. It is possible to speed up the vacuum packaging operation.

  The above-described embodiment should be considered as illustrative in all points and not restrictive. The present invention is not limited to the above description, but is defined by the scope of the claims, and includes all modifications within the scope and meaning equivalent to the scope of the claims.

DESCRIPTION OF SYMBOLS 1 Vacuum packaging apparatus 2 Chamber 2a Main body part 2b Cover part 3 Deaeration apparatus 5 Loading port closing device 6 Sealing heater 7 Bag expansion | swelling detection apparatus 8 Control apparatus 9 Suction port 10 Lower closing block 11 Upper closing block 12 Close Cylinder 13 Input port closing drive channel 14 Input port closing solenoid valve 15 Bag adhering portion 16 Vacuum pump 18 Intake channel 19 Vacuum solenoid valve 25 Closed branch port 26 Vacuum release branch port 27 Vacuum release valve 31 Bag contact portion 31a Detection piece 31b Stopper 32 Expansion detection sensor 40 One-chip microcomputer 41 Interface circuit 42 Power switch 43 Setting switch 44 Atmospheric pressure detection sensor 45 Lid opening / closing detection sensor 46 Buzzer 47 Display B Packaging bag Ba Packaged article input port

Claims (13)

A chamber for storing a packaging bag containing an article to be packaged containing a liquid; a deaeration device for degassing the inside of the packaging bag by depressurizing the chamber; A closing device that closes the material loading port, a sealing device that seals the closed packaging material loading port, and a control device that controls the deaeration device, the loading port closing device, and the sealing device. A vacuum packaging device comprising:
The controller is
In a state where a packaging bag containing a packaged product containing liquid and having a packaged product input port closed by the input port closing device is accommodated in the chamber, the chamber is decompressed by the deaeration device. A decompression step for inflating the packaging bag;
A depressurization stop step for stopping depressurization in the chamber by the degassing device and opening the package input port by releasing the closed state by the input port closing device;
In a state where the inside of the chamber is decompressed, a sealing step of closing the package input port by the input port closing device and sealing the package input port in the closed state by the sealing device;
After the sealing step, an air release step of opening the decompressed chamber to the atmosphere and returning it to atmospheric pressure;
Control to execute
A vacuum packaging apparatus configured to repeatedly execute the decompression step and the decompression stop step. A chamber for storing a packaging bag containing an article to be packaged containing a liquid; a deaeration device for degassing the inside of the packaging bag by depressurizing the chamber; An inlet closing device for closing an article inlet, a sealing device for sealing a closed article inlet, an expansion detection means capable of detecting expansion of a packaging bag in a chamber, a deaerator, and an inlet A control device for controlling the mouth closing device and the sealing device, and monitoring the expansion of the packaging bag detected by the expansion detection means, and a vacuum packaging device comprising:
The controller is
In a state where a packaging bag containing a packaged product containing liquid and having a packaged product input port closed by the input port closing device is accommodated in the chamber, the chamber is decompressed by the deaeration device. A decompression step for inflating the packaging bag;
A depressurization stop step for stopping depressurization in the chamber by the degassing device and opening the package input port by releasing the closed state by the input port closing device;
In a state where the inside of the chamber is decompressed, a sealing step of closing the package input port by the input port closing device and sealing the package input port in the closed state by the sealing device;
After the sealing step, the atmospheric release step of opening the reduced pressure chamber to the atmospheric pressure to return to atmospheric pressure,
Control to execute
In the depressurization step, based on the detection result of the expansion of the packaging bag by the expansion detection means, the depressurization step is terminated and the depressurization stop step, the sealing step, the atmosphere release step is performed, or the depressurization step is performed. A vacuum packaging apparatus, wherein the decompression process is re-executed after completion of the decompression stop process. In the decompression step, a decompression re-execution determination process is performed to determine whether or not the decompression step needs to be re-executed based on the detection result of the expansion of the packaging bag by the expansion detection means,
When it is determined that the re-execution of the decompression process is unnecessary, the decompression process is terminated and a decompression stop process, a sealing process, and an atmosphere release process are performed,
When it is determined that the decompression process needs to be re-executed, the decompression process and the decompression re-execution determination process are performed again after the decompression process is finished and the decompression stop process is performed. Item 3. A vacuum packaging apparatus according to Item 2. Comprising atmospheric pressure detection means for detecting the atmospheric pressure in the chamber;
The control device can calculate the pressure fluctuation value in the chamber generated from the start of the decompression process to the detection of the expansion of the packaging bag by the expansion detection means from the atmospheric pressure detected by the atmospheric pressure detection means, and the decompression process The time required for the expansion that has elapsed from the start of the detection until the detection of the expansion of the packaging bag by the expansion detection means can be measured,
In the decompression re-execution determination process, when at least one of the atmospheric pressure fluctuation value is smaller than the decompression re-execution determination fluctuation reference value or the expansion required time is shorter than the decompression re-execution determination reference time is established. The vacuum packaging apparatus according to claim 3, wherein it is determined that re-execution of the decompression step is unnecessary. Comprising atmospheric pressure detection means for detecting the atmospheric pressure in the chamber;
The control device can calculate the pressure fluctuation value in the chamber generated from the start of the decompression step to the detection of the expansion of the packaging bag by the expansion detection means from the pressure detected by the pressure detection means,
The pressure reduction re-execution determination process determines that re-execution of the pressure reduction process is unnecessary when the pressure fluctuation value is smaller than the pressure reduction re-execution determination reference value. Vacuum packaging equipment. The control device is capable of measuring the time required for the expansion that has elapsed from the start of the decompression step to the detection of the expansion of the packaging bag by the expansion detection means,
4. The vacuum according to claim 3, wherein, in the decompression re-execution determination process, it is determined that the re-execution of the decompression step is unnecessary when the required expansion time is shorter than the decompression re-execution determination reference time. Packaging equipment.   The said expansion | swelling detection means is provided with the bag contact part which contact | abuts a packaging bag, and the expansion detection sensor which can detect expansion | swelling of a packaging bag by detecting the attitude | position change of this bag contact part. The vacuum packaging apparatus according to any one of claims 2 to 6. In a state where the packaging bag containing the packaged material containing the liquid is accommodated, the inside of the chamber is deaerated by depressurizing the inside of the packaging bag, and in this state, the package input port of the packaging bag is closed, In the vacuum packaging method of sealing the package input port and vacuum packaging the package,
In a state where the packaging object containing the liquid is stored and the packaging bag in which the packaging object inlet is closed is housed in the chamber, the decompression step of expanding the packaging bag by decompressing the inside of the chamber;
A depressurization stop step for stopping the depressurization in the chamber and opening the closed package input port;
A sealing step of closing the package input port in a state where the inside of the chamber is decompressed, and sealing the package input port in a closed state;
After the sealing step, the atmospheric release step of opening the reduced pressure chamber to the atmospheric pressure to return to atmospheric pressure,
Run
The vacuum packaging method, wherein the decompression step and the decompression stop step are repeatedly executed. In a state where the packaging bag containing the packaged material containing the liquid is accommodated, the inside of the chamber is deaerated by depressurizing the inside of the packaging bag, and in this state, the package input port of the packaging bag is closed, In the vacuum packaging method of sealing the package input port and vacuum packaging the package,
In a state where the packaging object containing the liquid is stored and the packaging bag in which the packaging object inlet is closed is housed in the chamber, the decompression step of expanding the packaging bag by decompressing the inside of the chamber;
A depressurization stop step for stopping the depressurization in the chamber and opening the closed package input port;
A sealing step of closing the package input port in a state where the inside of the chamber is decompressed, and sealing the package input port in a closed state;
After the sealing step, the atmospheric release step of opening the reduced pressure chamber to the atmospheric pressure to return to atmospheric pressure,
Run
In the depressurization step, based on the detection result of the expansion of the packaging bag, the depressurization step is terminated and the depressurization stop step, the sealing step, and the air release step are performed, or the depressurization step is terminated and the depressurization step is performed. A vacuum packaging method, wherein the decompression step is re-executed after the stop step. In the decompression step, a decompression re-execution determination process is performed to determine whether or not the decompression step needs to be re-executed based on the detection result of expansion of the packaging bag
When it is determined that the re-execution of the decompression process is unnecessary, the decompression process is terminated and a decompression stop process, a sealing process, and an atmosphere release process are performed,
When it is determined that the decompression process needs to be re-executed, the decompression process and the decompression re-execution determination process are performed again after the decompression process is finished and the decompression stop process is performed. Item 10. The vacuum packaging method according to Item 9. Calculate the pressure fluctuation value in the chamber generated from the start of the decompression step to the detection of the expansion of the packaging bag,
The time required for the expansion that has elapsed between the start of the decompression step and the detection of the expansion of the packaging bag,
In the decompression re-execution determination process, when at least one of the atmospheric pressure fluctuation value is smaller than the decompression re-execution determination fluctuation reference value or the expansion required time is shorter than the decompression re-execution determination reference time is established. The vacuum packaging method according to claim 10, wherein it is determined that re-execution of the decompression step is unnecessary. Calculate the pressure fluctuation value in the chamber generated from the start of the decompression step to the detection of the expansion of the packaging bag,
The pressure reduction re-execution determination process determines that re-execution of the pressure reduction process is unnecessary when the pressure fluctuation value is smaller than a pressure reduction re-execution determination reference value. Vacuum packaging method. The time required for the expansion that has elapsed between the start of the decompression step and the detection of the expansion of the packaging bag is counted,
11. The vacuum according to claim 10, wherein in the decompression re-execution determination process, it is determined that the re-execution of the decompression process is unnecessary when the required expansion time is shorter than the decompression re-execution determination reference time. Packaging method.

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