Inflation and ventilation device

Abstract

The utility model provides an air charging and exchanging device. The air charging and exchanging device comprises a box body shell, a first air path assembly, a second air path assembly and a middle air pipe. A first air inlet of the box body shell is used for communicating with an air source, and a second air inlet is used for communicating with vacuumizing equipment; the first gas outlet and the second gas outlet are used for being connected with low-temperature sample environment equipment; the first gas circuit assembly comprises a ball valve, a first electromagnetic valve, a first pressure gauge, a manual valve, a second electromagnetic valve and a first gas pipe assembly; the second gas path assembly comprises a third electromagnetic valve, a second pressure gauge, a fourth electromagnetic valve and a second gas pipe assembly; one end of the middle air pipe is connected with the first three-head air pipe clamping sleeve, and the other end of the middle air pipe is connected with the second three-head air pipe clamping sleeve. The air charging and exchanging device can effectively prevent air from being mixed when the first air path and / or the second air path conveys air to the sample cavity, so that frosting of low-temperature sample environment equipment is prevented, and the situation that the air charged into the sample cavity cannot reach the target temperature is prevented.

Description

Technical Field

[0001] The present application relates to the technical field of low-temperature sample environment equipment, and in particular to a charging and ventilation device. Background Art

[0002] In the field of materials science research, in order to study the microstructure of materials, people often place samples in high-temperature or high-pressure sample environment equipment, and use neutron scattering to observe the physical properties and phase changes of materials under different environmental conditions. The low-temperature environment of the sample is usually generated by refrigeration equipment. At present, many refrigeration equipment uses helium compression cooling technology to obtain low temperatures. These devices often use high-purity helium. Since the process of studying the physical properties of materials may involve changing the temperature of the sample multiple times, and a step-by-step change from low temperature to high temperature is required, different volumes of helium need to be filled into the sample chamber of the cryostat during the experiment in order to obtain different target temperatures.

[0003] When the existing cryostat is filled with helium into the sample chamber, the helium bottle and the cryostat are connected through an air pipe for inflation. During inflation, the helium may be mixed with the residual air in the cryostat and the air pipe, resulting in the helium being not pure enough, which may cause the cryostat to frost and the target temperature in the sample chamber to fail to reach. Utility Model Content

[0004] The present application provides a gas filling and ventilation device, which can solve the problem that the helium is not pure enough when filling helium into a low-temperature sample environment device.

[0005] The present application provides a charging and ventilation device, including a box shell, a first air circuit component, a second air circuit component and an intermediate air pipe. The box shell includes an air inlet side and an air outlet side, the air inlet side is provided with a first air inlet and a second air inlet, and the air outlet side is provided with a first air outlet and a second air outlet; the first air inlet is used to communicate with an air source, and the second air inlet is used to communicate with a vacuum pumping device; the first air outlet and the second air outlet are used to connect with a low-temperature sample environment device;

[0006] The first gas circuit assembly is arranged in the box shell; the first gas circuit assembly includes a ball valve, a first solenoid valve, a first pressure gauge, a manual valve, a second solenoid valve and a first air pipe assembly; the ball valve, the first solenoid valve, the first pressure gauge, the manual valve and the second solenoid valve are connected to form a first gas circuit through the first air pipe assembly, one end of the first gas circuit is connected to the first air inlet, and the other end of the first gas circuit is connected to the first air outlet;

[0007] The second gas circuit assembly is arranged in the box shell; the second gas circuit assembly includes a third solenoid valve, a second pressure gauge, a fourth solenoid valve and a second air pipe assembly, the third solenoid valve, the second pressure gauge and the fourth solenoid valve are connected to form a second gas circuit through the second air pipe assembly, one end of the second gas circuit is connected to the second air inlet, and the other end of the second gas circuit is connected to the second air outlet;

[0008] The first air pipe assembly includes a first three-head air pipe ferrule, the second air pipe assembly includes a second three-head air pipe ferrule, one end of the middle air pipe is connected to the first three-head air pipe ferrule, and the other end of the middle air pipe is connected to the second three-head air pipe ferrule; in the first air circuit, the manual valve is located on the side of the first three-head air pipe ferrule close to the first air inlet.

[0009] In one embodiment, the ball valve, the first pressure gauge, the first solenoid valve, the manual valve and the second solenoid valve are connected in sequence from the first air inlet to the first air outlet; the third solenoid valve, the second pressure gauge and the fourth solenoid valve are connected in sequence from the second air inlet to the second air outlet.

[0010] In one embodiment, the first three-head air pipe ferrule is arranged between the manual valve and the second solenoid valve, and the second three-head air pipe ferrule is arranged between the third solenoid valve and the second pressure gauge.

[0011] In one embodiment, the charging and ventilation device further includes a control component, which is disposed in the box shell; the control component is used to control the switching of the first solenoid valve, the second solenoid valve, the third solenoid valve and the fourth solenoid valve.

[0012] In one embodiment, a power interface is provided on the box shell, a power supply is provided in the box, and the power interface is used to connect the vacuum equipment and the power supply so that the power supply provides electrical energy to the vacuum equipment.

[0013] In one embodiment, a network cable interface is provided on the housing, and the network cable interface is electrically connected to the control component.

[0014] In one embodiment, a power connection line is provided on the housing, and the power connection line is electrically connected to the power supply; the power connection line is used to be electrically connected to an external power supply to supply power to the power supply.

[0015] In one embodiment, a touch screen is also provided on the box shell, and the touch screen is used to display the pressure values ​​of the first gas circuit and the second gas circuit and to input instructions.

[0016] In one embodiment, an exhaust fan is also provided on the housing, and the exhaust fan dissipates heat from the control component.

[0017] In one embodiment, the charging and ventilation device also includes a first pressure sensor and a second pressure sensor, and the control component is used to receive the pressure values ​​of the first pressure sensor and the second pressure sensor, and output corresponding switching signals to control the switching of the first solenoid valve, the second solenoid valve, the third solenoid valve and the fourth solenoid valve.

[0018] The present application provides a charging and ventilation device, which includes a box shell, a first air circuit assembly, a second air circuit assembly and an intermediate air pipe. The box shell includes an air inlet side and an air outlet side, the air inlet side is provided with a first air inlet and a second air inlet, and the air outlet side is provided with a first air outlet and a second air outlet; the first air inlet is used to communicate with an air source, and the second air inlet is used to communicate with a vacuum pumping device; the first air outlet and the second air outlet are used to connect with a low-temperature sample environment device; the first air circuit assembly includes a ball valve, a first solenoid valve, a first pressure gauge, a manual valve, a second solenoid valve and a first air pipe assembly; the second air circuit assembly includes a third solenoid valve, a second pressure gauge, a fourth solenoid valve and a second air pipe assembly, the first air pipe assembly includes a first three-head air pipe ferrule, and the second air pipe assembly includes a second three-head air pipe ferrule; one end of the intermediate air pipe is connected to the first three-head air pipe ferrule, and the other end of the intermediate air pipe is connected to the second three-head air pipe ferrule. The second air inlet of the charging and ventilation device can be used to communicate with the vacuum pumping device, and the first air inlet is used to communicate with the gas source. Since the first air path and the second air path are connected through the intermediate air pipe, the vacuum pumping device can vacuum the first air path and / or the second air path, and vacuum the sample cavity connected to the first air outlet and the second air outlet, so that the first air path, the second air path and the sample cavity connected to each other can all achieve a vacuum environment. After vacuuming, the gas source is turned on to deliver gas to the first air path and / or the second air path, thereby effectively preventing the first air path and / or the second air path from mixing with air when delivering gas to the sample cavity, thereby preventing the low-temperature sample environment equipment from frosting and preventing the gas filled in the sample cavity from reaching the target temperature. In addition, the device can vacuum and deliver gas to two air paths at the same time, and can deliver low-temperature gas to two sample cavities at the same time, which can improve the efficiency of filling gas when multiple sample cavities are required, thereby improving the experimental efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of a charging and ventilation device provided in one embodiment of the present application;

[0020] Figure 2 for Figure 1 A front view of

[0021] Figure 3 for Figure 1 Schematic diagram of the explosion structure;

[0022] Figure 4This is a schematic diagram of the structure of the first gas circuit and the second gas circuit of the charging and ventilation device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0023] The present application is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are intended to enable the present application to be better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the present application are not shown or described in the specification, in order to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0024] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations, and the operation steps involved in each embodiment can also be replaced or adjusted in order in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for the purpose of clearly describing a certain embodiment, and do not mean that the composition and / or order are necessary.

[0025] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0026] The terms "parallel", "vertical", etc. are defined for the current state of the art, rather than being absolutely strict definitions in a mathematical sense. A small amount of deviation is allowed, and approximately parallel, approximately vertical, etc. are all acceptable. For example, A and B are parallel, which means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0° and 10°. For example, A and B are perpendicular, which means that A and B are perpendicular or approximately perpendicular, and the angle between A and B can be between 80° and 100°. The directional terms mentioned in the embodiments of the present application, such as "upper", "inner", "outer", "side", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0027] Please refer to Figure 1-4The present application provides a charging and ventilation device, including a box shell 10, a first air circuit component 20, a second air circuit component 30 and an intermediate air pipe 40.

[0028] The housing 10 includes an air inlet side 11 and an air outlet side 12. The housing 10 may be roughly in the shape of a rectangular parallelepiped. The air inlet side 11 and the air outlet side 12 may be arranged on two opposite side surfaces of the housing 10. The air inlet side 11 is provided with a first air inlet 111 and a second air inlet 112, and the air outlet side 12 is provided with a first air outlet 121 and a second air outlet 122. Of course, in other embodiments, the air inlet side 11 may also be provided with more air inlets, and the air outlet side 12 may also be provided with more air outlets, so that the gas source is inflated to more sample chambers. The first air inlet 111 is used to communicate with the gas source, wherein the gas source may be, for example, a helium cylinder, and a pressure reducing valve may be arranged on the helium cylinder. The second air inlet 112 is used to communicate with a vacuum pump, wherein the vacuum pump may be, for example, a mechanical pump.

[0029] The first air outlet 121 and the second air outlet 122 are used to connect to a low temperature sample environment device. The low temperature sample environment device may be, for example, a low temperature thermostat. The low temperature sample environment device has a sample cavity therein, and the sample cavity is used to place a sample, and the sample needs to be in a low temperature environment for experimental requirements.

[0030] Specifically, the first air outlet 121 and the second air outlet 122 can be used to communicate with different sample chamber gas paths respectively, so that the charging and ventilation device can inflate different low-temperature sample environment devices at the same time. Of course, the charging and ventilation device can also use only the first air outlet 121 or the second air outlet 122. When the charging and ventilation device only uses the first air outlet 121, that is, the first air outlet 121 is connected to the low-temperature sample environment device gas path, and the second air outlet 122 can be used as an exhaust port. When the charging and ventilation device only uses the second air outlet 122, that is, the second air outlet 122 is connected to the low-temperature sample environment device gas path, the first air outlet 121 can be used as an exhaust port.

[0031] Before using the gas filling device to fill the sample chamber, an air pipe can be used to connect the gas filling device and the gas source. For example, one end of the air pipe is connected to the pressure reducing valve of the gas cylinder, and the other end of the air pipe is connected to the flange on the first air inlet 111 of the box shell 10 with a flange and tightened with a clamp. Then, the mechanical pump is connected to the second air inlet 112 through a bellows. Then, a low-temperature sample environment device (such as a low-temperature thermostat) is connected to the flange on the first air outlet 121 or the second air outlet 122 with a hose and fixed with a clamp.

[0032] When using the gas filling and ventilation device to fill the sample chamber, first turn on the mechanical pump to evacuate, and then fill. Connect the cryostat refrigerator to the helium compressor, start the compressor to increase or decrease the temperature, and hoist it onto the sample stage of the spectrometer to provide different temperature environments for neutron scattering experiments. By adjusting the intake pressure to control the volume of gas (helium) in the sample chamber, a lower and more stable temperature effect can be obtained.

[0033] For further information, please refer to Figure 3 and Figure 4 The first gas circuit assembly 20 is disposed in the box housing 10. The first gas circuit assembly 20 includes a ball valve 21, a first solenoid valve 23, a first pressure gauge 22, a manual valve 24, a second solenoid valve 25 and a first air pipe assembly 26. The ball valve 21, the first solenoid valve 23, the first pressure gauge 22, the manual valve 24 and the second solenoid valve 25 are connected to form a first gas circuit through the first air pipe assembly 26, one end of the first gas circuit is communicated with the first air inlet 111, and the other end of the first gas circuit is communicated with the first air outlet 121.

[0034] The second gas circuit assembly 30 is disposed in the box housing 10. The second gas circuit assembly 30 includes a third solenoid valve 31, a second pressure gauge 32, a fourth solenoid valve 33 and a second air pipe assembly 34. The third solenoid valve 31, the second pressure gauge 32 and the fourth solenoid valve 33 are connected to form a second gas circuit through the second air pipe assembly 34. One end of the second gas circuit is communicated with the second air inlet 112, and the other end of the second gas circuit is communicated with the second air outlet 122.

[0035] The first air pipe assembly 26 includes a first three-end air pipe ferrule 261, the second air pipe assembly 34 includes a second three-end air pipe ferrule 341, one end of the intermediate air pipe 40 is connected to the first three-end air pipe ferrule 261, and the other end of the intermediate air pipe 40 is connected to the second three-end air pipe ferrule 341. In addition, the first air pipe assembly 26 and the second air pipe assembly 34 each include a plurality of air pipes and a plurality of double-end air pipe ferrules.

[0036] Among them, the first solenoid valve 23 serves as the main valve of the gas source, and can control whether the gas source supplies gas to the first gas outlet 121 and the second gas outlet 122 by opening and closing the first solenoid valve 23. The ball valve 21 can be used as a backup valve for the first solenoid valve 23. When there is a problem with the first solenoid valve 23, the ball valve 21 can be manually closed to stop the gas source from supplying gas to the first gas outlet 121 and the second gas outlet 122. The first pressure gauge 22 is used to display the air pressure of the first gas circuit, and the second pressure gauge 32 is used to display the air pressure of the second gas circuit. The second solenoid valve 25 serves as a branch valve of the first gas circuit, which can control whether the first gas outlet 121 is to discharge gas; the fourth solenoid valve 33 serves as a branch valve of the second gas circuit, which can control whether the second gas outlet 122 is to discharge gas. The third solenoid valve 31 is a switch for controlling vacuum extraction.

[0037] When the first solenoid valve 23 is opened, since the intermediate air pipe 40 connects the first air path and the second air path, the air source can deliver air to the first air outlet 121 and the second air outlet 122. When the first solenoid valve 23 is closed, the air source cannot deliver air to the first air outlet 121 and the second air outlet 122. Under the premise that the first solenoid valve 23 is opened, when the first air outlet 121 and the second air outlet 122 are connected to different sample cavities that need to be inflated, the second solenoid valve 25 and the fourth solenoid valve 33 can be opened. When only the first air outlet 121 is used and the second air outlet 122 is not used, the fourth solenoid valve 33 can be closed and only the second solenoid valve 25 can be opened; when only the second air outlet 122 is used and the first air outlet 121 is not used, the fourth solenoid valve 33 can be opened and the second solenoid valve 25 can not be opened.

[0038] In the first gas path, the manual valve 24 is located on one side of the first three-head gas pipe sleeve 261 close to the first gas inlet 111. Therefore, when the manual valve 24 is closed, the vacuuming path can be reduced, making the vacuuming faster.

[0039] The second air inlet 112 of the charging and ventilation device can be used to communicate with the vacuum pumping device, and the first air inlet 111 is used to communicate with the gas source. Since the first air path and the second air path are connected through the intermediate air pipe 40, the vacuum pumping device can vacuum the first air path and / or the second air path, and vacuum the sample cavity connected to the first air outlet 121 and the second air outlet 122, so that the first air path, the second air path and the sample cavity connected to each other can all achieve a vacuum environment. After vacuuming, the gas source is turned on to deliver gas to the first air path and / or the second air path, thereby effectively preventing the first air path and / or the second air path from mixing with air when delivering gas to the sample cavity, thereby preventing the low-temperature sample environment equipment from frosting and preventing the gas filled in the sample cavity from failing to reach the target temperature. In addition, the device can vacuum and deliver gas to two air paths at the same time, and can deliver low-temperature gas to two sample cavities at the same time, which can improve the efficiency of filling gas when multiple sample cavities are required, thereby improving the experimental efficiency.

[0040] In addition, the inflation and ventilation device integrates the first gas circuit and the second gas circuit in the box shell 10, and the box shell 10 has the first gas circuit and the second gas circuit built, and each gas circuit includes various valves, air pipes, pressure gauges, etc. The operator does not need to rebuild the gas circuit every time he performs vacuuming and inflation, but only needs to connect the vacuuming equipment, the air source, and the equipment to be inflated to the interface on the box shell 10. By reducing the steps of building the gas circuit, the efficiency of the operator's inflation can be improved, and the box shell 10 is easy to store and move, which brings convenience to the experimenter.

[0041] like Figure 3 and Figure 4As shown, in one embodiment, the ball valve 21, the first pressure gauge 22, the first solenoid valve 23, the manual valve 24 and the second solenoid valve 25 are connected in gas path from the first air inlet 111 to the first air outlet 121 in sequence. The third solenoid valve 31, the second pressure gauge 32 and the fourth solenoid valve 33 are connected in gas path from the second air inlet 112 to the second air outlet 122 in sequence. Further, the first three-head air pipe ferrule 261 is arranged between the manual valve 24 and the second solenoid valve 25, and the second three-head air pipe ferrule 341 is arranged between the third solenoid valve 31 and the second pressure gauge 32. Thus, the first solenoid valve 23 controls whether the air source inflates the sample chamber connected to the first air outlet 121 and the second air outlet 122, the second solenoid valve 25 and the fourth solenoid valve 33 can respectively control the inflation of the sample chamber connected to the first air outlet 121 and the second air outlet 122, and the third solenoid valve 31 can control whether the first air path and the second air path are evacuated.

[0042] In the existing experimental process, before cooling, the operator enters the dangerous experimental environment to manually fill the low temperature thermostat with helium, which takes a lot of time and manual operation, and also causes a waste of machine time. In order to make more efficient use of precious machine time, and to reduce the number of operations performed by personnel and avoid unnecessary mistakes, in one embodiment, the charging and ventilation device also includes a control component 50, and the control component 50 is arranged in the box shell 10. Among them, the control component 50 may include a wire box 51, a leakage switch 52, a relay 53, a programmable logic controller 54 (PLC), a PLC fixing rod 55, etc. The control component 50 is used to control the switches of the first solenoid valve 23, the second solenoid valve 25, the third solenoid valve 31 and the fourth solenoid valve 33. As a result, the operator can remotely control the operation of vacuuming and inflating the low temperature thermostat, and the operator does not need to enter the dangerous experimental environment for a long time to install and operate, which is conducive to the efficient use of machine time.

[0043] In one embodiment, if Figure 2 As shown, a power interface 13 is provided on the box shell 10, and a power supply 60 is provided in the box. The power interface 13 is used to connect the vacuum equipment and the power supply 60, so that the power supply 60 provides electrical energy to the vacuum equipment, so that the vacuum equipment can be started.

[0044] like Figure 2 As shown, in one embodiment, a network cable interface 14 is provided on the box housing 10, and the network cable interface 14 is electrically connected to the control component 50. The network cable interface 14 is used to connect a network cable so that the operator can remotely control the vacuum degree, gas pressure, vacuum pump opening and closing, etc.

[0045] In one embodiment, a power connection line 15 is provided on the box housing 10 , and the power connection line 15 is electrically connected to the power source 60 ; the power connection line 15 is used to be electrically connected to the external power source 60 to supply power to the power source 60 .

[0046] In one embodiment, a touch screen 16 is further provided on the box housing 10, and the touch screen 16 is used to display the pressure values ​​of the first gas circuit and the second gas circuit and for the operator to input instructions.

[0047] In one embodiment, an exhaust fan 17 is further disposed on the box shell 10 , and the exhaust fan 17 dissipates heat for the control component 50 .

[0048] In one embodiment, the gas charging and exchanging device further includes a first pressure sensor and a second pressure sensor, and the control component 50 is used to receive the pressure values ​​of the first pressure sensor and the second pressure sensor, and output corresponding switch signals to control the switches of the first solenoid valve 23, the second solenoid valve 25, the third solenoid valve 31, and the fourth solenoid valve 33. Thus, the control component 50 can accurately control the gas pressure, thereby controlling the volume of the gas that rushes into the low-temperature sample environment device, thereby more accurately controlling the temperature in the sample chamber.

[0049] The device is suitable for room temperature environment, the inlet pressure is ≤0.5MPa (controlled by the pressure reducing valve of the gas cylinder), the pressure control accuracy is ≤1KPa; the outlet pressure control range is between 1KPa and 150KPa, and the gas medium is helium; the vacuum leakage rate is ≤10 - 10 Pa·m 3 / s.

[0050] The above specific examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. For those skilled in the art of the present invention, some simple deductions, deformations or substitutions can be made based on the idea of ​​the present invention.

Claims

1. A charging and ventilation device, characterized in that: include: A box shell, the box shell includes an air inlet side and an air outlet side, the air inlet side is provided with a first air inlet and a second air inlet, and the air outlet side is provided with a first air outlet and a second air outlet; the first air inlet is used to communicate with an air source, and the second air inlet is used to communicate with a vacuum pumping device; the first air outlet and the second air outlet are used to connect with a low-temperature sample environment device; A first gas circuit assembly is arranged in the box shell; the first gas circuit assembly includes a ball valve, a first solenoid valve, a first pressure gauge, a manual valve, a second solenoid valve and a first air pipe assembly; the ball valve, the first solenoid valve, the first pressure gauge, the manual valve and the second solenoid valve are connected to form a first gas circuit through the first air pipe assembly, one end of the first gas circuit is communicated with the first air inlet, and the other end of the first gas circuit is communicated with the first air outlet; A second gas circuit assembly is arranged in the box shell; the second gas circuit assembly includes a third solenoid valve, a second pressure gauge, a fourth solenoid valve and a second air pipe assembly, the third solenoid valve, the second pressure gauge and the fourth solenoid valve are connected to form a second gas circuit through the second air pipe assembly, one end of the second gas circuit is connected to the second air inlet, and the other end of the second gas circuit is connected to the second air outlet; And an intermediate air pipe, the first air pipe assembly includes a first three-head air pipe ferrule, the second air pipe assembly includes a second three-head air pipe ferrule, one end of the intermediate air pipe is connected to the first three-head air pipe ferrule, and the other end of the intermediate air pipe is connected to the second three-head air pipe ferrule; in the first air circuit, the manual valve is located on the side of the first three-head air pipe ferrule close to the first air inlet.

2. The charging and ventilation device according to claim 1, characterized in that: The ball valve, the first pressure gauge, the first solenoid valve, the manual valve and the second solenoid valve are connected in sequence from the first air inlet to the first air outlet; the third solenoid valve, the second pressure gauge and the fourth solenoid valve are connected in sequence from the second air inlet to the second air outlet.

3. The charging and ventilation device according to claim 2, characterized in that: The first three-end air pipe ferrule is arranged between the manual valve and the second solenoid valve, and the second three-end air pipe ferrule is arranged between the third solenoid valve and the second pressure gauge.

4. The charging and ventilation device according to any one of claims 1 to 3, characterized in that: It also includes a control component, which is arranged in the box shell; the control component is used to control the switching of the first solenoid valve, the second solenoid valve, the third solenoid valve and the fourth solenoid valve.

5. The charging and ventilation device according to claim 4, characterized in that: The box shell is provided with a power supply interface, the box body is provided with a power supply, and the power supply interface is used to connect the vacuum equipment and the power supply so that the power supply provides electrical energy to the vacuum equipment.

6. The charging and ventilation device according to claim 4, characterized in that: The box shell is provided with a network cable interface, and the network cable interface is electrically connected to the control component.

7. The charging and ventilation device according to claim 5, characterized in that: The box shell is provided with a power connection line, and the power connection line is electrically connected to the power supply; the power connection line is used to be electrically connected to an external power supply to supply power to the power supply.

8. The charging and ventilation device according to claim 4, characterized in that: The box shell is also provided with a touch screen, and the touch screen is used to display the pressure values ​​of the first gas path and the second gas path and to input instructions.

9. The charging and ventilation device according to claim 4, characterized in that: The box shell is also provided with an exhaust fan, and the exhaust fan dissipates heat for the control component.

10. The charging and ventilation device according to claim 4, characterized in that: It also includes a first pressure sensor and a second pressure sensor. The control component is used to receive the pressure values ​​of the first pressure sensor and the second pressure sensor, and output corresponding switching signals to control the switching of the first solenoid valve, the second solenoid valve, the third solenoid valve and the fourth solenoid valve.

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