Universal automatic inflation and ventilation equipment and method based on pressure and humidity control

Abstract

The invention belongs to the technical field of external field guarantee, and relates to universal automatic inflation and ventilation equipment and method based on pressure and humidity control. The automatic air charging and exchanging equipment is composed of a box body structure, an air path system and a control system. The box body is of a movable cart type structure and serves as a force bearing piece and a mounting platform of the whole equipment. The gas path system consists of a gas path valve group, a vacuum pump and a sensor, and provides gas path connection and gas path control for the whole equipment; the control system is a control core assembly of the whole equipment, completes the whole air inflation and ventilation operation according to a preset working process, and has a manual operation function at the same time. Pressure and humidity parameter data in the box are collected to serve as feedback signals of the whole control process, opening and closing of all the electromagnetic valves are controlled through the controller, automatic conversion of the inflation and ventilation functions and automatic control over the whole inflation and ventilation process are achieved, dry gas in a gas cylinder is used for replacing wet gas in the packaging box, and the packaging box is convenient to use. And finally, the inner environment of the packaging box is in a dry positive pressure environment.

Description

Technical Field

[0001] The present invention belongs to the field of field support technology and relates to a universal automatic filling and ventilation device, and in particular to a universal automatic filling and ventilation device which uses the pressure and humidity inside the box as feedback signals, can adjust the inflation pressure, exhaust pressure, alarm pressure and target humidity value, and realizes fully automatic control. Background Art

[0002] In order to ensure the storage environment of the packaged goods in the box and extend its storage life, a dry and clean storage environment needs to be provided. In view of the current use requirements of sealed packaging boxes, it is necessary to perform regular ventilation operations to ensure the storage environment of the packaged goods in the box; the ventilation equipment used in the past is mostly special equipment designed specifically for a certain type of packaging box, and the humidity in the box is controlled by the number of ventilation times. The ventilation pressure is generally a fixed value, and it does not have an adjustment function, and its versatility is poor. Traditional inflation and deflation methods generally only consider rate and reliability design. For example, patent CN110104208A proposes an inflation and deflation control device, which achieves accurate inflation and deflation rates by designing a specific control circuit, improving the test control accuracy and operation rate. For example, patent CN208236609U discloses a pressure automatic control device and inflation device. The patent collects and compares pressure signals, and automatically calculates the calculation relationship of the deflation control valve opening pressure according to the manually input working pressure. Finally, the product can be applied to a variety of inflatable products with different working pressures, and it plays a protective role on inflatable products. Summary of the invention

[0003] Purpose of the invention: The present invention designs an automatic inflation and ventilation device based on pressure and humidity control, which performs inflation and ventilation control through pressure and humidity coordination, and realizes universal application through adjustable inflation pressure, exhaust pressure, alarm pressure and target humidity values ​​and quick interface replacement.

[0004] Technical solution: In order to achieve the above invention purpose, the present invention proposes a universal automatic charging and ventilation equipment based on pressure and humidity control, which is mainly composed of a box structure, an air circuit system and a control system. The box adopts a movable cart-type structure, which is the load-bearing part and installation platform of the whole equipment; the air circuit system is composed of an air circuit valve group, a vacuum pump and a sensor, which provides air circuit connection and air circuit control for the whole equipment; the control system is the core control component of the whole equipment, which completes the whole charging and ventilation operation according to the predetermined workflow, and also has a manual operation function.

[0005] Furthermore, the box structure adopts a frame-type cart structure, which is composed of a frame, a base, side doors, a rear door, a front cover, and a front cover; the frame is installed above the base, and the air path system and the control system are installed in the frame; a side door is arranged on each side, and a rear door is arranged on the rear side for equipment installation and maintenance; an accessory box is arranged under the front cover for storing operating tools and pipelines; a control panel and a display screen are arranged under the rear cover, which are the charging and ventilation operation interface.

[0006] Furthermore, casters are installed at the bottom of the base so that the device can move freely on the ground.

[0007] Further, the gas circuit system is composed of a filter, a first pressure gauge, a one-way valve, a pressure reducing valve, a second pressure gauge, a manual inflation valve, an automatic inflation solenoid valve, a vacuum pump, an automatic air extraction solenoid valve, a manual air extraction valve, a pressure sensor, a humidity sensor, and a sealing box;

[0008] Among them, the filter, the first pressure gauge, the one-way valve, the pressure reducing valve, the second pressure gauge, the manual inflation valve, and the automatic inflation solenoid valve constitute the inflation gas circuit; the vacuum pump, the automatic air extraction solenoid valve, the manual air extraction valve, the pressure sensor, the humidity sensor, and the sealing box constitute the air extraction and sampling gas circuit; when performing automatic inflation and ventilation operations, the gas source port is connected to the gas cylinder, and the inflation port, the air extraction port / sampling port are connected to the packaging box; the high-pressure gas in the gas cylinder passes through the gas source port, is filtered and reduced in pressure, and then enters the packaging box through the inflation port to achieve inflation of the packaging box; the gas in the packaging box enters the sealed box through the air extraction port / sampling port, is evacuated by the vacuum pump and exhausted to the outside to achieve ventilation in the box, and manual inflation and ventilation can be achieved through manual valve operation.

[0009] Furthermore, in the inflation air circuit: the filter, the one-way valve, and the pressure reducing valve are connected in series in sequence through management and then divided into two branches connected to the inflation port of the packaging box; one branch is connected in series with a manual inflation valve, and the other branch is connected in series with an automatic inflation solenoid valve; the filter is connected to an external air source to filter impurities in the air source, and a first pressure gauge is connected between the one-way valve and the pressure reducing valve; the second pressure gauge is connected between the pressure reducing valve and the two branches.

[0010] Furthermore, in the air extraction and sampling gas circuit, the vacuum pump, the automatic air extraction solenoid valve, and the sealing box are connected in series through pipelines and then connected to the air extraction / sampling port of the equipment; a manual air extraction valve is also arranged between the automatic air extraction solenoid valve and the sealing box, and manual air release is achieved through the manual air release port; the sealing box collects the gas in the equipment, and a pressure sensor and a humidity sensor are arranged on the sealing box to monitor the pressure signal and humidity signal in the equipment in real time.

[0011] On the other hand, the present invention also proposes a universal automatic inflation and ventilation method based on pressure and humidity control, which adopts the inflation and ventilation equipment designed as above, and the control system adopts 220V mains power supply, and is composed of a display screen, a control panel, a power module, a controller, a sensor, a vacuum pump, a control switch, a solenoid valve and a manual valve; on the display screen, manual or automatic working mode can be selected, and parameters such as inflation pressure, exhaust pressure, alarm pressure and target humidity value can be set, and parameters such as humidity and pressure in the box can be monitored in real time; the control panel is equipped with a solenoid valve control button and a manual valve operation switch, which can realize manual inflation and ventilation operation; the power module mainly supplies power to the display screen, the controller, the vacuum pump and other equipment; the controller receives the control instructions sent from the display screen and the control panel, receives the pressure and humidity parameters collected by the sensor, and controls the working state of each switch and the vacuum pump. The sensor collects the humidity and pressure parameters in the box through the sampling port; the vacuum pump is used to evacuate the box; the control switch receives the controller signal to open and close the solenoid valve, and can also manually control the manual valve to open and close.

[0012] Furthermore, when performing automatic filling and ventilation operations, the gas source port of the equipment is connected to the gas cylinder through a pipeline, the filling port, the exhaust port / sampling port are connected to the packaging box through pipelines, and the power port is connected to the mains to complete the system pipeline and power connection; after the equipment is powered on, the system self-check is completed, and the inflation pressure, exhaust pressure, alarm pressure and target humidity value are set according to the different filling and ventilation requirements and pressure bearing capacity of the packaging box; click the start button to enter the automatic filling and ventilation process.

[0013] Furthermore, the inflation and ventilation process is as follows: first detect the pressure inside the box, and determine whether to perform vacuum or inflation operation first according to the pressure value inside the box; if the vacuum operation is performed first, start the vacuum pump during vacuuming, and open the vacuum solenoid valve; when the pressure inside the box is evacuated to reach the set value, close the vacuum solenoid valve and the vacuum pump, perform the inflation process, and open the inflation solenoid valve; at the same time, detect the humidity data inside the box in real time, and determine whether the humidity inside the box reaches the required value after each inflation is completed. If the humidity meets the standard, stop working and the inflation and ventilation process ends. If the humidity does not meet the standard, continue the vacuum and inflation process until the next inflation is completed, and then perform the humidity judgment. If the judgment result is qualified, the process ends.

[0014] Furthermore, the basis for determining whether to perform the exhaust or inflation operation first is: exhaust is performed when the relative pressure in the box is ≥ 0 kPa, and inflation is performed when the relative pressure in the box is < 0 kPa.

[0015] Technical effect: Compared with the traditional inflation and deflation design, the automatic inflation and deflation device and the automatic inflation and deflation method proposed by the present invention can achieve at least the following technical advantages:

[0016] 1) By collecting the pressure and humidity parameter data in the box as the feedback signal of the entire control process, and controlling the opening and closing of each solenoid valve through the controller, the automatic conversion of the inflation and ventilation functions and the automatic control of the entire inflation and ventilation process are realized, and the dry gas in the gas cylinder is used to replace the humid gas in the packaging box, and finally the environment in the packaging box is in a dry positive pressure environment;

[0017] 2) The inflation pressure, exhaust pressure, alarm pressure and target humidity are adjustable to suit packaging boxes of different volumes and pressure bearing capacities; the inflation interface and exhaust / sampling interface are quick-release and replaceable to suit packaging boxes of different interface forms, thus achieving self-adaptation and universality for packaging boxes of different models;

[0018] 3) It has an overpressure alarm function. The alarm pressure value is set according to the pressure bearing capacity of the packaging box. When the pressure inside the box exceeds the set value, the system automatically sounds an alarm and stops working, which has a self-protection function;

[0019] 4) The mobile cart-type structure makes the whole equipment highly maneuverable and can be moved to any place for operation at any time;

[0020] 5) It has a manual operation function, which can realize manual charging and ventilation operation when the control system cannot work normally or there is no power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a diagram of the box structure composition of the present invention;

[0022] Figure 2 It is the gas circuit principle diagram of the present invention;

[0023] Figure 3 This is the control principle block diagram;

[0024] Figure 4 This is the automatic charging and ventilation flow chart.

[0025] Among them, casters 1-1, frame 1-2, base 1-3, side door 1-4, rear door 1-5, front cover 1-6, front cover 1-7, handle 1-8, filter 2-1, pressure gauge 2-2, one-way valve 2-3, pressure reducing valve 2-4, pressure gauge 2-5, manual inflation valve 2-6, automatic inflation solenoid valve 2-7, vacuum pump 2-8, automatic air extraction solenoid valve 2-9, manual air extraction valve 2-10, pressure sensor 2-11, humidity sensor 2-12, sealing box 2-13. DETAILED DESCRIPTION

[0026] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the present invention is described in detail below in conjunction with the drawings or specific implementation cases of the specification. It should be noted that some (but not all) of the disclosed examples are shown in the drawings. In fact, many different examples can be described and these examples should not be understood as being limited to the examples set forth herein. On the contrary, these examples are described so that the positive effects of the present invention are more reflected, and any parts not detailed in the text are regarded as known techniques or conventional technical means in the art.

[0027] See attached Figures 1 to 4 In the specific implementation process of the present invention, Figure 1 A universal automatic charging and ventilation equipment based on pressure and humidity control, mainly composed of a box structure, a gas circuit system and a control system. The box adopts a movable cart-type structure, which is the load-bearing part and installation platform of the whole equipment; the gas circuit system consists of a gas circuit valve group, a vacuum pump and a sensor, providing gas circuit connection and gas circuit control for the whole equipment; the control system is the core control component of the whole equipment, which completes the whole charging and ventilation operation according to the predetermined workflow, and also has a manual operation function.

[0028] In the specific implementation case of the present invention, see the attached Figure 1 As shown, the box structure of the automatic charging and ventilation equipment adopts a frame-type cart structure, which is composed of casters 1-1, a frame 1-2, a base 1-3, side doors 1-4, a rear door 1-5, a front cover 1-6, a front cover 1-7, and a handle 1-8; by installing casters at the bottom of the base, the equipment has the function of moving freely on the ground; the frame is installed above the base, and the air path system and control system are installed in the frame; a side door is set on the left and right, and a rear door is set on the rear side for equipment installation and maintenance; an accessory box is set under the front cover for storing operating tools and pipelines; a control panel and a display screen are set under the rear cover, which are the charging and ventilation operation interface.

[0029] In the automatic filling and ventilation device designed by the present invention, the gas circuit system is composed of Figure 2 As shown, it is composed of a filter 2-1, a pressure gauge 2-2, a one-way valve 2-3, a pressure reducing valve 2-4, a pressure gauge 2-5, a manual air-inflating valve 2-6, an automatic air-inflating solenoid valve 2-7, a vacuum pump 2-8, an automatic air-exhausting solenoid valve 2-9, a manual air-exhausting valve 2-10, a pressure sensor 2-11, a humidity sensor 2-12, and a sealing box 2-13. When performing automatic air-inflating and ventilation operations, the gas source port is connected to the gas cylinder, and the air-inflating port, the air-exhausting port / sampling port are connected to the packaging box; the high-pressure gas in the gas cylinder passes through the gas source port, is filtered and decompressed, and then enters the packaging box through the air-inflating port to achieve air-inflating of the packaging box; the gas in the packaging box enters the sealing box through the air-exhausting port / sampling port, and is evacuated by the vacuum pump and exhausted to the outside to achieve air exchange in the box. At the same time, manual air-inflating and ventilation can be achieved through manual valve operation.

[0030] For the automatic filling and ventilation device designed by the present invention, the core design lies in the design of the functional gas circuit. Figure 2 As shown, in the inflation gas circuit specifically designed by the present invention: the filter, the one-way valve, and the pressure reducing valve are connected in series in sequence through management and then divided into two branches and connected to the inflation port of the packaging box; one branch is connected in series with a manual inflation valve, and the other branch is connected in series with an automatic inflation solenoid valve; the filter is connected to an external gas source to filter impurities in the gas source, and the first pressure gauge is connected between the one-way valve and the pressure reducing valve; the second pressure gauge is connected between the pressure reducing valve and the two branches. Correspondingly, in the exhaust sampling gas circuit designed by the present invention, the vacuum pump, the automatic exhaust solenoid valve, and the sealing box are connected in series through pipelines in sequence to the exhaust / sampling port of the equipment; a manual exhaust valve is also provided between the automatic exhaust solenoid valve and the sealing box, and manual deflation is achieved through the manual deflation port; the sealing box collects gas in the equipment, and a pressure sensor and a humidity sensor are provided on the sealing box to monitor the pressure signal and humidity signal in the equipment in real time.

[0031] Based on the automatic filling and ventilation equipment designed as above, a universal automatic filling and ventilation method based on pressure and humidity control is also proposed in the implementation process of the present invention. The filling and ventilation equipment designed as above is adopted, and the principle block diagram of the control system is as follows: Figure 3 As shown, it is powered by 220V mains electricity and consists of a display screen, a control panel, a power module, a controller, a sensor, a vacuum pump, a control switch, a solenoid valve and a manual valve. On the display screen, you can select manual or automatic working mode, set parameters such as inflation pressure, exhaust pressure, alarm pressure and target humidity value, and monitor the humidity and pressure in the box in real time; the control panel is equipped with a solenoid valve control button and a manual valve operation switch to realize manual inflation and ventilation operations; the power module mainly supplies power to the display screen, controller, vacuum pump and other equipment; the controller receives the control instructions sent from the display screen and the control panel, receives the pressure and humidity parameters collected by the sensor, and controls the working status of each switch and vacuum pump. The sensor collects the humidity and pressure parameters in the box through the sampling port; the vacuum pump is used to vacuum the box; the control switch receives the controller signal to open and close the solenoid valve, and can also manually control the manual valve to open and close.

[0032] When performing automatic filling and ventilation operations, connect the gas source port of the equipment to the gas cylinder through a pipeline, connect the filling port, exhaust port / sampling port to the packaging box through pipelines, and connect the power port to the mains to complete the system pipeline and power connection; after the equipment is powered on, complete the system self-check, set the filling pressure, exhaust pressure, alarm pressure and target humidity value according to the different filling and ventilation requirements and pressure bearing capacity of the packaging box; click the start button to enter the automatic filling and ventilation process.

[0033] See attached Figure 4As shown, in the specific implementation process, the inflation and ventilation process is: first detect the pressure in the box, and determine whether to perform vacuum or inflation operation first according to the pressure value in the box (vacuuming is performed when the relative pressure in the box is ≥0kPa, and inflation is performed when it is <0kPa); taking the vacuum operation as an example, start the vacuum pump during vacuuming, and open the vacuum solenoid valve; when the pressure in the box is exhausted to reach the set value, close the vacuum solenoid valve and the vacuum pump, perform the inflation process, and open the inflation solenoid valve; at the same time, detect the humidity data in the box in real time, and determine whether the humidity in the box reaches the required value after each inflation is completed. If the humidity meets the standard, stop working and the inflation and ventilation process ends. If the humidity does not meet the standard, continue the vacuum and inflation process until the humidity is judged after the next inflation is completed, and end the process after the judgment result is qualified.

[0034] The working principle of the automatic filling and ventilation device designed in the present invention is as follows: when performing the automatic filling and ventilation operation, the gas source port of the device is connected to the gas cylinder through a pipeline, the filling port, the air extraction port / sampling port are connected to the packaging box through a pipeline, and the power port is connected to the mains to complete the system pipeline and power connection; after the device is powered on, the system self-check is completed, and the filling pressure, air extraction pressure, alarm pressure and target humidity value are set according to the different filling and ventilation requirements and pressure bearing capacity of the packaging box; click the start button to enter the automatic filling and ventilation process: first, the pressure in the box is detected, and it is determined whether to perform the extraction or filling operation first according to the pressure value in the box (when the relative pressure in the box is ≥0 kPa, exhaust is performed, and inflation is performed when <0kPa); taking the exhaust operation as an example, the vacuum pump is started during exhaust, and the exhaust solenoid valve is opened; when the pressure in the box is exhausted to reach the set value, the exhaust solenoid valve and the vacuum pump are closed, the inflation process is performed, and the inflation solenoid valve is opened; at the same time, the humidity data in the box is detected in real time, and after each inflation is completed, it is judged whether the humidity in the box reaches the required value. If the humidity meets the standard, the work is stopped and the inflation process ends. If the humidity does not meet the standard, the exhaust and inflation processes continue until the next inflation is completed, and then the humidity is judged. If the judgment result is qualified, the process ends.

[0035] The present invention has been manufactured and applied to practical work, and its beneficial effects have been verified in actual use. The automatic filling and ventilation equipment and automatic filling and ventilation method designed by the present invention can achieve the following purposes at the same time when actually implemented:

[0036] 1) By collecting the pressure data in the box, the automatic conversion of the inflation and ventilation functions is realized; through the humidity feedback, the automatic operation of the inflation and ventilation process is realized; thus, the automatic control of the entire inflation and ventilation process is realized;

[0037] 2) By adjusting the inflation pressure, exhaust pressure, alarm pressure and target humidity value, as well as adaptive replacement or universal design of interfaces, it can achieve self-adaptation to different types of packaging boxes and realize universalization;

[0038] 3) The pressure inside the box is collected through the pressure sensor to realize automatic alarm for overpressure conditions and achieve automatic protection function;

[0039] 4) At the same time, a manual operation function is set to realize semi-automatic or manual charging and ventilation functions when the control system cannot work normally or there is no power supply.

[0040] The above specific implementation methods or cases are only used to explain the technical solutions of the present invention, and are not intended to limit the present application. Any parts not described in detail are deemed to be conventional technical means or common knowledge in the field. It can be understood by ordinary technicians in this field that: based on the design concept of the present application, the technical solutions recorded in the aforementioned implementation methods should be adaptively modified, or some or all of the technical features therein should be replaced by equivalents. These modifications, equivalent replacements, and adaptively improved technical solutions do not depart from the technical essence of the present invention and should all be covered within the protection scope of the present application.

Claims

1. A universal automatic filling and ventilation device based on pressure and humidity control, characterized in that: The automatic filling and ventilation equipment is composed of a box structure, an air circuit system and a control system; the box adopts a movable cart-type structure, which is the load-bearing part and installation platform of the entire equipment; The gas circuit system consists of a gas circuit valve group, a vacuum pump and a sensor, which provide gas circuit connection and gas circuit control for the entire equipment; the control system is the core control component of the entire equipment, which completes the entire charging and ventilation operation according to the predetermined workflow, and also has manual operation function.

2. A universal automatic filling and ventilation device based on pressure and humidity control as claimed in claim 1, characterized in that: The box structure adopts a frame-type cart structure, which is composed of a frame, a base, side doors, a rear door, a front cover, and a front cover; the frame is installed above the base, and the air path system and control system are installed inside the frame; a side door is set on each side, and a rear door is set on the rear side for equipment installation and maintenance; an accessory box is set under the front cover for storing operating tools and pipelines; under the rear cover are the control panel and display screen, which are the charging and ventilation operation interface.

3. A universal automatic filling and ventilation device based on pressure and humidity control as claimed in claim 2, characterized in that: Casters are installed at the bottom of the base to enable the equipment to move freely on the ground.

4. A universal automatic filling and ventilation device based on pressure and humidity control as claimed in claim 1, characterized in that: The gas circuit system consists of a filter, a first pressure gauge, a one-way valve, a pressure reducing valve, a second pressure gauge, a manual air charging valve, an automatic air charging solenoid valve, a vacuum pump, an automatic air extraction solenoid valve, a manual air extraction valve, a pressure sensor, a humidity sensor, and a sealing box; Among them, the filter, the first pressure gauge, the one-way valve, the pressure reducing valve, the second pressure gauge, the manual inflation valve, and the automatic inflation solenoid valve constitute the inflation gas circuit; the vacuum pump, the automatic air extraction solenoid valve, the manual air extraction valve, the pressure sensor, the humidity sensor, and the sealing box constitute the air extraction and sampling gas circuit; when performing automatic inflation and ventilation operations, the gas source port is connected to the gas cylinder, and the inflation port, the air extraction port / sampling port are connected to the packaging box; the high-pressure gas in the gas cylinder passes through the gas source port, is filtered and reduced in pressure, and then enters the packaging box through the inflation port to achieve inflation of the packaging box; the gas in the packaging box enters the sealed box through the air extraction port / sampling port, is evacuated by the vacuum pump and exhausted to the outside to achieve ventilation in the box, and manual inflation and ventilation can be achieved through manual valve operation.

5. A universal automatic filling and ventilation device based on pressure and humidity control as claimed in claim 4, characterized in that: In the inflation air circuit: the filter, the one-way valve, and the pressure reducing valve are connected in series in sequence through management and then divided into two branches connected to the inflation port of the packaging box; one branch is connected in series with a manual inflation valve, and the other branch is connected in series with an automatic inflation solenoid valve; the filter is connected to an external air source to filter impurities in the air source, and the first pressure gauge is connected between the one-way valve and the pressure reducing valve; the second pressure gauge is connected between the pressure reducing valve and the two branches.

6. A universal automatic filling and ventilation device based on pressure and humidity control as claimed in claim 4, characterized in that: In the vacuum sampling gas circuit, the vacuum pump, automatic vacuum solenoid valve and sealing box are connected in series through pipelines and then connected to the vacuum / sampling port of the equipment; a manual vacuum valve is also provided between the automatic vacuum solenoid valve and the sealing box, and manual deflation is achieved through the manual deflation port; the sealing box collects the gas in the equipment, and a pressure sensor and a humidity sensor are provided on the sealing box to monitor the pressure signal and humidity signal in the equipment in real time.

7. A universal automatic inflation and ventilation method based on pressure and humidity control, using the inflation and ventilation equipment as described in any one of claims 1 to 6, the control system is powered by 220V AC power, and is composed of a display screen, a control panel, a power module, a controller, a sensor, a vacuum pump, a control switch, a solenoid valve and a manual valve; on the display screen, manual or automatic working mode can be selected, the inflation pressure, exhaust pressure, alarm pressure and target humidity value parameters can be set, and the humidity and pressure parameters in the box can be monitored in real time; the control panel is equipped with a solenoid valve control button and a manual valve operation switch to realize manual inflation and ventilation operations; the power module mainly supplies power to the display screen, the controller, and the vacuum pump equipment; the controller receives and transmits control instructions sent from the display screen and the control panel, receives the pressure and humidity parameters collected by the sensor, and controls the working status of each switch and the vacuum pump; the sensor collects the humidity and pressure parameters in the box through the sampling port; the vacuum pump is used to evacuate the box; the control switch receives the controller signal to open and close the solenoid valve, and can also manually control the manual valve to open and close.

8. A universal automatic inflation and ventilation method based on pressure and humidity control as claimed in claim 7, characterized in that: When performing automatic filling and ventilation operations, connect the gas source port of the equipment to the gas cylinder through a pipeline, connect the filling port, exhaust port / sampling port to the packaging box through pipelines, and connect the power port to the mains to complete the system pipeline and power connection; after the equipment is powered on, complete the system self-check, set the filling pressure, exhaust pressure, alarm pressure and target humidity value according to the different filling and ventilation requirements and pressure bearing capacity of the packaging box; click the start button to enter the automatic filling and ventilation process.

9. A universal automatic inflation and ventilation method based on pressure and humidity control as claimed in claim 7, characterized in that: The inflation and ventilation process is as follows: first detect the pressure inside the box, and determine whether to perform vacuum or inflation operation first based on the pressure value inside the box; if the vacuum operation is performed first, start the vacuum pump during vacuuming, and open the vacuum solenoid valve; when the pressure inside the box is evacuated to reach the set value, close the vacuum solenoid valve and the vacuum pump, perform the inflation process, and open the inflation solenoid valve; at the same time, detect the humidity data inside the box in real time, and determine whether the humidity inside the box reaches the required value after each inflation is completed. If the humidity meets the standard, stop working and the inflation and ventilation process ends. If the humidity does not meet the standard, continue the vacuum and inflation process until the next inflation is completed, and then perform the humidity judgment. If the judgment result is qualified, the process ends.

10. A universal automatic inflation and ventilation method based on pressure and humidity control as claimed in claim 9, characterized in that: The basis for determining whether to perform the vacuum or inflation operation first is: vacuum is performed when the relative pressure in the box is ≥ 0kPa, and inflation is performed when it is < 0kPa.

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