A mixed gas automatic air exchange device, method and terminal equipment

Abstract

The application provides a mixed gas full-automatic air exchange device, method and terminal equipment, wherein the mixed gas full-automatic air exchange device comprises a to-be-exchanged equipment interface, a first electromagnetic valve, a first air pump, a second electromagnetic valve, a calibrated compressed gas chamber, a thermometer, a first pressure gauge, a second air pump, a third electromagnetic valve, a first interface, a fourth electromagnetic valve and a second interface which are connected through pipelines; the corresponding air exchange method steps are simple, all air exchange operations can be completed through one-time equipment docking, all the first gas in the gas chamber of the to-be-exchanged equipment does not need to be extracted and then exchanged, and the first gas is not easy to cause the loss of escape; and the volume of the gas chamber of the to-be-exchanged equipment can be calculated and determined during the air exchange process, the use amount and the loss amount of the first gas are accurately counted, and the difficulty of controlling the use amount and the loss amount of the first gas is reduced.

Description

Technical Field

[0001] This invention relates to the technical field of gas insulation equipment, and more particularly to a fully automatic gas exchange device, method and terminal equipment for mixed gases. Background Technology

[0002] Sulfur hexafluoride (SF6) is a highly electronegative gas. Its molecules readily adsorb free electrons to form large negative ions, thereby weakening the collisional ionization process in the gas. As a result, it has strong electrical insulation properties and arc-extinguishing ability, and is widely used in gas insulation equipment.

[0003] However, SF6 poses a significant threat to the atmospheric environment, and the commissioning, maintenance, leakage, and recovery of SF6 gas-insulated equipment all release SF6 into the atmosphere. Therefore, to reduce SF6 usage, it is necessary to research alternatives to pure SF6 gas-insulated equipment. Existing alternatives include replacing the pure SF6 in the gas-insulated equipment with a mixture of SF6 and another gas. This alternative does not require replacing the original gas-insulated equipment; only the pure SF6 gas in the gas chamber needs to be replaced with the mixed gas.

[0004] Currently, ventilation devices for pure SF6 gas insulation equipment have the following problems: Due to the lack of accurate gas volume data for the equipment to be ventilated, gas usage is only obtained through gas flow meters. However, the flow meters' readings fluctuate significantly with changes in gas pressure, leading to measurement errors and making it difficult to accurately track and statistically analyze the usage and loss of each gas. Furthermore, it requires the complete extraction of SF6 from the equipment before refilling with a mixed gas according to the specified ratio, a complex process that necessitates connection to different devices and increases the risk of gas loss due to escaping. These shortcomings make it difficult for existing ventilation devices to effectively control SF6 usage and loss. Summary of the Invention

[0005] This invention provides a fully automatic gas exchange device, method, and terminal equipment for mixed gases, which solves the technical problem that existing gas exchange devices have high difficulty in controlling the usage and loss of SF6.

[0006] The first aspect of the present invention provides a fully automatic gas exchange device for mixed gas, comprising: an interface of the equipment to be exchanged, a first solenoid valve, a first air pump, a second solenoid valve, a calibrated compressed air chamber, a thermometer, a first pressure gauge, a second air pump, a third solenoid valve, a first interface, a fourth solenoid valve, and a second interface, all connected by a pipeline.

[0007] The interface for the device to be ventilated is used to connect the gas chamber of the device to be ventilated to the pipeline; the first interface is used to connect the first gas cylinder to the pipeline; and the second interface is used to connect the second gas cylinder to the pipeline.

[0008] The first solenoid valve is provided with a first end for communicating with the interface of the air exchange device, and a second end for communicating with the third end of the first air pump;

[0009] The second solenoid valve is provided with a fifth end for communicating with the fourth end of the first air pump, and a sixth end for communicating with the seventh end of the calibration air source chamber.

[0010] The calibration compressed air chamber is equipped with a first pressure gauge and a thermometer;

[0011] The second air pump is provided with a ninth end for communicating with the eighth end of the calibration air source chamber, and a tenth end for communicating with the eleventh end of the third solenoid valve.

[0012] The third solenoid valve is provided with a twelfth terminal for communicating with the first interface;

[0013] The fourth solenoid valve is provided with a thirteenth end for connecting to the pipeline between the first air pump and the second solenoid valve, and a fourteenth end for connecting to the second interface.

[0014] Optionally, the fully automatic mixed gas exchange device further includes a second pressure gauge disposed on the pipeline connecting the first solenoid valve and the first air pump.

[0015] Optionally, the fully automatic mixed gas exchange device further includes a flow meter connected between the fourth solenoid valve and the second interface;

[0016] The flow meter is provided with a fifteenth terminal for communication with the fourteenth terminal and a sixteenth terminal for communication with the second interface.

[0017] A second aspect of the present invention provides a fully automatic gas exchange method for mixed gases, applied to a fully automatic gas exchange device for mixed gases as described in any of the preceding claims, the method comprising:

[0018] S1. Close the first solenoid valve and the fourth solenoid valve, open the second solenoid valve and the third solenoid valve, start the second air pump, extract the air from the fully automatic gas exchange device until the measured value of the first pressure gauge meets the first preset pressure condition, and then stop the second air pump.

[0019] S2. Close the third solenoid valve, connect the empty first gas cylinder to the first interface, connect the second gas cylinder filled with the second gas to the second interface, connect the gas chamber of the equipment to be ventilated containing only the first gas to the interface of the equipment to be ventilated, and obtain the first ambient temperature and the first pressure of the gas chamber of the equipment to be ventilated.

[0020] S3. Open the first solenoid valve, start the first air pump, and pump part of the gas in the air chamber of the equipment to be ventilated to the calibration compressed air chamber until the pressure in the air chamber of the equipment to be ventilated meets the second preset pressure condition. Then, stop the first air pump and obtain the second ambient temperature, the second pressure of the air chamber of the equipment to be ventilated, the third pressure measured by the first pressure gauge, and the temperature of the calibration compressed air chamber measured by the thermometer.

[0021] S4. Using the first pressure, the second pressure, the third pressure, the first ambient temperature, the second ambient temperature, the calibrated compressed air chamber temperature, and the first volume of the calibrated compressed air chamber, calculate the second volume of the air chamber of the equipment to be ventilated, and the first molar amount of the first gas in the air chamber of the equipment to be ventilated after step S2.

[0022] S5. Start the first air pump to pump part of the gas in the air chamber of the equipment to be ventilated to the calibrated compressed air chamber until the pressure in the air chamber of the equipment to be ventilated reaches the first preset pressure value. Then, stop the first air pump and obtain the third ambient temperature.

[0023] S6. Close the second solenoid valve, open the fourth solenoid valve, start the first air pump, and pump part of the gas in the second gas cylinder to the gas chamber of the equipment to be ventilated until the pressure in the gas chamber of the equipment to be ventilated reaches the second preset pressure value, and then stop the first air pump.

[0024] S7. Open the third solenoid valve and start the second air pump to pump all the gas in the calibrated compressed air chamber to the first gas cylinder.

[0025] S8. Based on the second volume, the second molar amount, the first preset pressure value, and the third ambient temperature, calculate the second molar amount of the first gas in the air chamber of the air-to-be-exchanged equipment after step S5 is completed.

[0026] S9. Using the first molar amount and the second molar amount, combined with the weight change of the first gas cylinder, calculate the loss of the first gas.

[0027] Optionally, step S4 specifically includes:

[0028] The first van der Waals equation is constructed using the third pressure, the calibrated compressed air chamber temperature, and the first volume.

[0029] Using the first ambient temperature and the first pressure, a second van der Waals equation is constructed;

[0030] Using the second ambient temperature and the second pressure, a third van der Waals equation is constructed; by combining the first van der Waals equation, the second van der Waals equation, and the third van der Waals equation, the second volume and the first molar quantity are obtained.

[0031] Optionally, the first van der Waals equation is:

[0032]

[0033] In the formula, P r For the third pressure, T r The calibrated compressed air chamber temperature is given by V1, where V1 is the first volume and n is the number of volumes. r The molar amount of the first gas transferred to the calibration compression chamber after step S3 is completed, where a and b are the van der Waals constants of the first gas, and R is the ideal gas constant;

[0034] The second van der Waals equation is:

[0035]

[0036] In the formula, P1 is the first pressure, T1 is the first ambient temperature, V2 is the second volume, and n1 is the first molar amount;

[0037] The third van der Waals equation is:

[0038]

[0039] In the formula, P2 is the second pressure, and T2 is the second ambient temperature.

[0040] Optionally, the formula for calculating the second molar amount is:

[0041]

[0042] In the formula, n2 is the second molar quantity, V2 is the second volume, and P p T3 is the first preset pressure value, T3 is the third ambient temperature, a and b are the van der Waals constants of the first gas, and R is the ideal gas constant.

[0043] Optionally, step S9 specifically includes:

[0044] Based on the weight change of the first gas cylinder before step S2 and after step S7, calculate the third molar amount of the first gas in the first gas cylinder after step S6.

[0045] The loss of the first gas is calculated using the first molar amount, the second molar amount, and the third molar amount.

[0046] Optionally, the formula for calculating the loss is:

[0047] W = n1 - (n2 + n3)

[0048] In the formula, W represents the loss amount, n1 represents the first molar amount, n2 represents the second molar amount, and n3 represents the third molar amount.

[0049] A third aspect of the present invention provides a terminal device, characterized in that it includes a processor, a memory, and the fully automatic gas exchange device for mixed gas as described in any one of the preceding claims;

[0050] The memory is used to store program code and transmit the program code to the processor;

[0051] The processor is connected to the fully automatic mixed gas exchange device and is used to control the fully automatic mixed gas exchange device to perform the fully automatic mixed gas exchange method as described above according to the instructions in the program code.

[0052] As can be seen from the above technical solutions, the present invention has the following advantages:

[0053] This invention provides a fully automatic mixed gas exchange device, method, and terminal equipment. The fully automatic mixed gas exchange device includes an interface of the device to be exchanged, a first solenoid valve, a first air pump, a second solenoid valve, a calibrated compressed air chamber, a thermometer, a first pressure gauge, a second air pump, a third solenoid valve, a first interface, a fourth solenoid valve, and a second interface, all connected by pipelines. The corresponding exchange method has simple steps and can complete all exchange operations through a single equipment connection. It does not require extracting all the first gas from the air chamber of the device to be exchanged before exchange, thus reducing the risk of first gas loss. Furthermore, the volume of the air chamber of the device to be exchanged can be calculated and determined during the exchange process, accurately recording the usage and loss of the first gas, reducing the difficulty of controlling the usage and loss of the first gas. Attached Figure Description

[0054] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0055] Figure 1 This is a schematic diagram of the fully automatic gas exchange device for mixed gases provided in Embodiment 1 of the present invention;

[0056] Figure 2This is a flowchart of the steps of the fully automatic gas exchange method for mixed gas provided in Embodiment 2 of the present invention. Detailed Implementation

[0057] This invention provides a fully automatic gas exchange device, method, and terminal equipment for mixed gases, which solves the technical problem that existing gas exchange devices have high difficulty in controlling the usage and loss of SF6.

[0058] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0059] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of the fully automatic gas exchange device for mixed gas provided in Embodiment 1 of the present invention.

[0060] The present invention provides a fully automatic gas exchange device for mixed gas, comprising: an interface 1 for the equipment to be exchanged, a first solenoid valve 2, a first air pump 3, a second solenoid valve 4, a calibrated compressed air chamber 5, a thermometer 6, a first pressure gauge 7, a second air pump 8, a third solenoid valve 9, a first interface 10, a fourth solenoid valve 11, and a second interface 12 connected by pipelines.

[0061] The air exchange equipment interface 1 is used to connect the air chamber of the air exchange equipment to the pipeline, the first interface 10 is used to connect the first gas cylinder to the pipeline, and the second interface 12 is used to connect the second gas cylinder to the pipeline.

[0062] The first solenoid valve 2 is provided with a first end for communicating with the interface 1 of the equipment to be ventilated, and a second end for communicating with the third end of the first air pump 3.

[0063] The second solenoid valve 4 is provided with a fifth end for communicating with the fourth end of the first air pump 3, and a sixth end for communicating with the seventh end of the calibration air source chamber 5.

[0064] The calibrated compressed air chamber 5 is equipped with a first pressure gauge 7 and a thermometer 6;

[0065] The second air pump 8 is provided with a ninth end for connecting to the eighth end of the calibration air source chamber, and a tenth end for connecting to the eleventh end of the third solenoid valve 9.

[0066] The third solenoid valve 9 is provided with a twelfth end for communicating with the first interface 10;

[0067] The fourth solenoid valve 11 is provided with a thirteenth end for connecting to the pipeline between the first air pump 3 and the second solenoid valve 4, and a fourteenth end for connecting to the second interface 12.

[0068] It should be noted that the volume of the calibrated compressed air chamber 5 is a known value, and the volume of the air chamber of the equipment to be ventilated can be calculated based on the volume of the calibrated compressed air chamber 5 and the van der Waals equation. According to the direction of air pumping of each air pump in the corresponding fully automatic mixed gas ventilation method, the second air pump 8 can be a unidirectional air pump or a bidirectional air pump, and the first air pump 3 can be a bidirectional air pump.

[0069] In a preferred embodiment, the fully automatic gas exchange device further includes a second pressure gauge 13 disposed on the pipeline connecting the first solenoid valve 2 and the first air pump 3. The second pressure gauge 13 can be used to measure the pressure of the air chamber of the equipment to be exchanged, and can also be used together with the pressure gauge on the air chamber of the equipment to be exchanged to determine whether the fully automatic gas exchange device has been properly connected to the air chamber of the equipment to be exchanged.

[0070] In a preferred embodiment, the fully automatic gas exchange device for the mixed gas further includes a flow meter 14 connected between the fourth solenoid valve 11 and the second interface 12; the flow meter is provided with a fifteenth end for communication with the fourteenth end and a sixteenth end for communication with the second interface 12. The flow meter facilitates the acquisition of data on the usage of the second gas.

[0071] Please see Figure 2 , Figure 2 This is a flowchart of the steps of the fully automatic gas exchange method for mixed gas provided in Embodiment 2 of the present invention.

[0072] The second embodiment of the present invention provides a fully automatic gas exchange method for mixed gases, which is applied to any of the fully automatic gas exchange devices for mixed gases provided in the first embodiment of the present invention. The method includes:

[0073] Step 201: Close the first solenoid valve 2 and the fourth solenoid valve 11, open the second solenoid valve 4 and the third solenoid valve 9, start the second air pump 8, extract the air from the fully automatic gas exchange device until the measured value of the first pressure gauge 7 meets the first preset pressure condition, and then stop the second air pump 8.

[0074] It should be noted that the air in the fully automatic gas-mixing ventilation device is extracted until the measurement value of the first pressure gauge 7 meets the first preset pressure condition, that is, all the air in the fully automatic gas-mixing ventilation device is extracted until the inside of the fully automatic gas-mixing ventilation device is in a vacuum state. When the measurement value of the first pressure gauge 7 begins to stabilize at a lower value, it indicates that the gas in the fully automatic gas-mixing ventilation device has been almost completely extracted, and at this time the measurement value of the first pressure gauge 7 is close to the vacuum standard (such as 10 times the atmospheric pressure). -3 Up to 10 -6 When the pressure is (times), it can be confirmed that the inside of the fully automatic gas exchange device for the mixed gas is in a vacuum state. Therefore, the first preset pressure condition can be set according to the atmospheric pressure on site.

[0075] Step 202: Close the third solenoid valve 9, connect the empty first gas cylinder to the first interface 10, connect the second gas cylinder filled with the second gas to the second interface 12, connect the gas chamber of the equipment to be ventilated containing only the first gas to the interface 1 of the equipment to be ventilated, and obtain the first ambient temperature and the first pressure of the gas chamber of the equipment to be ventilated.

[0076] It should be noted that an empty first gas cylinder refers to a first gas cylinder that is not filled with any gas or other substance. After being connected to a fully automatic mixed gas exchange device, the first gas cylinder can be used to store excess first gas extracted from the equipment to be exchanged. In practical applications, the gas chamber of the gas insulation equipment to be exchanged is filled with pure SF6 gas, which is the first gas in this invention. However, due to the inherent shortcomings of SF6, improvements are needed, requiring the replacement of the pure SF6 in the gas insulation equipment with a mixture of SF6 and another gas. This other gas is the second gas in this invention, which can be nitrogen (N2), carbon tetrafluoride (CF4), etc.

[0077] The ambient temperature can be obtained by using a thermometer installed at the site where the ventilation is carried out, and the first pressure can be obtained by using a pressure gauge installed on the air chamber of the equipment to be ventilated or by using a second pressure gauge 13.

[0078] Step 203: Open the first solenoid valve 2, start the first air pump 3, and pump part of the gas in the air chamber of the equipment to be ventilated to the calibration compressed air chamber 5 until the pressure in the air chamber of the equipment to be ventilated meets the second preset pressure condition. Stop the first air pump 3 and obtain the second ambient temperature, the second pressure of the air chamber of the equipment to be ventilated, the third pressure measured by the first pressure gauge 7, and the calibration compressed air chamber temperature in the calibration compressed air chamber 5 measured by the thermometer 6.

[0079] It should be noted that step 203 is to obtain the pressure and temperature data of the air chamber to be ventilated and the calibration compression chamber 5 after pumping part of the gas in the air chamber to be ventilated to the calibration compression chamber 5, so as to perform subsequent calculation of the second volume of the air chamber to be ventilated. Pumping too much gas out of the air chamber to be ventilated may lead to insufficient amount of first gas in the air chamber to be ventilated and require reverse transmission. Therefore, it is not necessary to pump too much gas out of the air chamber to be ventilated. The first air pump 3 can be paused when the pressure of the air chamber to be ventilated changes significantly, that is, when the pressure change is greater than 5 times the minimum detection accuracy of the second pressure gauge. The second preset pressure condition can be set according to the minimum detection accuracy of the second pressure gauge 13.

[0080] Step 204: Using the first pressure, second pressure, third pressure, first ambient temperature, second ambient temperature, calibrated compressed air chamber temperature, and the first volume of calibrated compressed air chamber 5, calculate the second volume of the air chamber of the equipment to be ventilated, and the first molar amount of the first gas in the air chamber of the equipment to be ventilated after step 202.

[0081] It is understandable that the first volume is the volume of the calibrated compressed air chamber 5, the second volume is the volume of the air chamber of the equipment to be ventilated, and the first molar quantity is the molar quantity of the first gas in the air chamber of the equipment to be ventilated after step 202.

[0082] In a preferred embodiment, step 204 specifically includes:

[0083] The first van der Waals equation is constructed using the third pressure, the calibrated temperature of the compressed air chamber, and the first volume.

[0084] Using the first ambient temperature and first pressure, a second van der Waals equation is constructed;

[0085] The third van der Waals equation is constructed using the second ambient temperature and the second pressure.

[0086] By simultaneously solving the first, second, and third van der Waals equations, the second volume and the first molar quantity can be obtained.

[0087] Furthermore, the first van der Waals equation is:

[0088]

[0089] In the formula, P r As the third pressure, T r To calibrate the temperature of the compressed air chamber, V1 is the first volume, n r The molar amount of the first gas transferred to the calibration compression chamber 5 after step 203 is completed, where a and b are the van der Waals constants of the first gas, and R is the ideal gas constant;

[0090] The second van der Waals equation is:

[0091]

[0092] In the formula, P1 is the first pressure, T1 is the first ambient temperature, V2 is the second volume, and n1 is the first molar quantity;

[0093] The third van der Waals equation is:

[0094]

[0095] In the formula, P2 is the second pressure and T2 is the second ambient temperature.

[0096] It should be noted that the first, second, and third van der Waals equations are all constructed based on the van der Waals equation. The first van der Waals equation characterizes the state of the gas in the calibrated compression chamber 5 after completing step 203; the second van der Waals equation characterizes the state of the gas in the chamber of the equipment to be emptied after completing step 203; and the third van der Waals equation characterizes the state of the gas in the chamber of the equipment to be emptied before completing step 203.

[0097] Step 205: Start the first air pump 3 to pump part of the gas in the air chamber of the equipment to be ventilated to the calibrated compressed air chamber 5 until the pressure in the air chamber of the equipment to be ventilated reaches the first preset pressure value. Then, stop the first air pump 3 and obtain the third ambient temperature.

[0098] It should be noted that, based on the mixing ratio of the target first gas and the second gas in the gas exchange equipment, and combined with Dalton's law of partial pressures, the first gas partial pressure and the second gas partial pressure in the target mixed gas in the gas exchange equipment can be calculated, and the first preset pressure value can be the first gas partial pressure.

[0099] Step 206: Close the second solenoid valve 4, open the fourth solenoid valve 11, start the first air pump 3, pump part of the gas in the second gas cylinder to the gas chamber of the equipment to be ventilated, until the pressure in the gas chamber of the equipment to be ventilated reaches the second preset pressure value, and then stop the first air pump 3.

[0100] It should be noted that, based on the mixing ratio of the first gas and the second gas of the target gas in the gas exchange equipment, and combined with Dalton's law of partial pressures, the partial pressures of the first gas and the second gas in the target gas mixture in the gas exchange equipment can be calculated, and the second preset pressure value can be the sum of the partial pressures of the first gas and the second gas.

[0101] It is understandable that after step 206 is completed, the gas in the gas chamber of the gas exchange device has been completely replaced with the target mixed gas that meets the mixing ratio of the target first gas and the second gas.

[0102] Step 207: Open the third solenoid valve 9 and start the second air pump 8 to pump all the gas in the calibrated compressed air chamber 5 to the first gas cylinder.

[0103] Understandably, steps 206 and 207 can be performed simultaneously.

[0104] Step 208: Based on the second volume, the second molar amount, the first preset pressure value, and the third ambient temperature, calculate the second molar amount of the first gas in the gas chamber of the equipment to be ventilated after step 205.

[0105] It is understandable that the second molar amount is the molar amount of the first gas in the gas chamber of the equipment to be ventilated after step 205 is completed.

[0106] In a preferred embodiment, the formula for calculating the second molar amount is:

[0107]

[0108] In the formula, n2 is the second molar quantity, V2 is the second volume, and P p T3 is the first preset pressure value, T3 is the third ambient temperature, a and b are the van der Waals constants of the first gas, and R is the ideal gas constant.

[0109] It should be noted that the formula for calculating the second molar quantity is based on the van der Waals equation. This formula characterizes the state of the gas in the gas chamber of the equipment to be ventilated after step 205.

[0110] Step 209: Using the first molar amount and the second molar amount, combined with the weight change of the first gas cylinder, calculate the loss of the first gas.

[0111] In a preferred embodiment, step 209 specifically includes:

[0112] Based on the weight change of the first gas cylinder before step 202 and after step 207, calculate the third molar amount of the first gas in the first gas cylinder after step 206.

[0113] The loss of the first gas is calculated using the first molar amount, the second molar amount, and the third molar amount.

[0114] It is understandable that the third molar quantity is the molar quantity of the first gas in the first gas cylinder after step 206 is completed.

[0115] Furthermore, the formula for calculating the loss of the first gas is:

[0116] W = n1 - (n2 + n3)

[0117] In the formula, W represents the loss amount, n1 represents the first molar amount, n2 represents the second molar amount, and n3 represents the third molar amount.

[0118] It is understandable that the first gas loss calculated in this step can be used to calculate the first gas loss rate for the control of the first gas.

[0119] Embodiment 2 of the present invention provides a fully automatic gas exchange method based on the fully automatic gas exchange device of Embodiment 1 of the present invention. The steps are simple, and all gas exchange operations can be completed by only one equipment docking in step 202. It is not necessary to extract all the first gas in the gas chamber of the device to be exchanged before gas exchange, which is less likely to cause the first gas to escape and be lost. Moreover, the volume of the gas chamber of the device to be exchanged can be calculated and determined by the van der Waals equation during the gas exchange process, and the usage and loss of the first gas can be accurately counted, which reduces the difficulty of controlling the usage and loss of the first gas.

[0120] Embodiment 3 of the present invention provides a terminal device, including a processor, a memory, and any of the fully automatic mixed gas exchange devices provided in Embodiment 1 of the present invention;

[0121] Memory is used to store program code and transfer the program code to the processor;

[0122] The processor is connected to the fully automatic gas exchange device and is used to control the fully automatic gas exchange device to execute any of the fully automatic gas exchange methods provided in Embodiment 2 of the present invention according to the instructions in the program code.

[0123] In the several embodiments provided in this application, it should be understood that the disclosed apparatus, methods, and devices can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0124] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0125] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0126] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0127] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fully automated ventilation method for mixed gases, characterized in that, It is used in fully automatic gas exchange devices for mixed gases; The fully automatic mixed gas exchange device includes: an interface for the equipment to be exchanged, a first solenoid valve, a first air pump, a second solenoid valve, a calibrated compressed air chamber, a thermometer, a first pressure gauge, a second air pump, a third solenoid valve, a first interface, a fourth solenoid valve, and a second interface, all connected by pipelines. The interface for the device to be ventilated is used to connect the gas chamber of the device to be ventilated to the pipeline; the first interface is used to connect the first gas cylinder to the pipeline; and the second interface is used to connect the second gas cylinder to the pipeline. The first solenoid valve is provided with a first end for communicating with the interface of the air exchange device, and a second end for communicating with the third end of the first air pump; The second solenoid valve is provided with a fifth end for communicating with the fourth end of the first air pump, and a sixth end for communicating with the seventh end of the calibrated compressed air chamber. The calibration compressed air chamber is equipped with a first pressure gauge and a thermometer; The second air pump is provided with a ninth end for communicating with the eighth end of the calibrated compressed air chamber, and a tenth end for communicating with the eleventh end of the third solenoid valve. The third solenoid valve is provided with a twelfth terminal for communicating with the first interface; The fourth solenoid valve is provided with a thirteenth end for connecting to the pipeline between the first air pump and the second solenoid valve, and a fourteenth end for connecting to the second interface. The method includes: S1. Close the first solenoid valve and the fourth solenoid valve, open the second solenoid valve and the third solenoid valve, start the second air pump, extract the air from the fully automatic gas exchange device until the measured value of the first pressure gauge meets the first preset pressure condition, and then stop the second air pump. S2. Close the third solenoid valve, connect the empty first gas cylinder to the first interface, connect the second gas cylinder filled with the second gas to the second interface, connect the gas chamber of the equipment to be ventilated containing only the first gas to the interface of the equipment to be ventilated, and obtain the first ambient temperature and the first pressure of the gas chamber of the equipment to be ventilated. S3. Open the first solenoid valve, start the first air pump, and pump part of the gas in the air chamber of the equipment to be ventilated to the calibration compressed air chamber until the pressure in the air chamber of the equipment to be ventilated meets the second preset pressure condition. Then, stop the first air pump and obtain the second ambient temperature, the second pressure of the air chamber of the equipment to be ventilated, the third pressure measured by the first pressure gauge, and the temperature of the calibration compressed air chamber measured by the thermometer. S4. Using the first pressure, the second pressure, the third pressure, the first ambient temperature, the second ambient temperature, the calibrated compressed air chamber temperature, and the first volume of the calibrated compressed air chamber, calculate the second volume of the air chamber of the equipment to be ventilated, and the first molar amount of the first gas in the air chamber of the equipment to be ventilated after step S2. S5. Start the first air pump to pump part of the gas in the air chamber of the equipment to be ventilated to the calibrated compressed air chamber until the pressure in the air chamber of the equipment to be ventilated reaches the first preset pressure value. Then, stop the first air pump and obtain the third ambient temperature. S6. Close the second solenoid valve, open the fourth solenoid valve, start the first air pump, and pump part of the gas in the second gas cylinder to the gas chamber of the equipment to be ventilated until the pressure in the gas chamber of the equipment to be ventilated reaches the second preset pressure value, and then stop the first air pump. S7. Open the third solenoid valve and start the second air pump to pump all the gas in the calibrated compressed air chamber to the first gas cylinder. S8. Based on the second volume, the first preset pressure value and the third ambient temperature, calculate the second molar amount of the first gas in the air chamber of the air-to-exchange device after step S5 is completed. S9. Using the first molar amount and the second molar amount, combined with the weight change of the first gas cylinder, calculate the loss of the first gas. Step S4 specifically includes: The first van der Waals equation is constructed using the third pressure, the calibrated compressed air chamber temperature, and the first volume. Using the first ambient temperature and the first pressure, a second van der Waals equation is constructed; Using the second ambient temperature and the second pressure, a third van der Waals equation is constructed. By combining the first, second, and third van der Waals equations, the second volume and the first molar quantity can be obtained.

2. The fully automatic gas exchange method for mixed gases according to claim 1, characterized in that, The first van der Waals equation is: ； In the formula, P r For the third pressure, T r The calibrated compressed air chamber temperature is given by V1, where V1 is the first volume and n is the number of volumes. r The molar amount of the first gas transferred to the calibration compression chamber after step S3 is completed, where a and b are the van der Waals constants of the first gas, and R is the ideal gas constant. The second van der Waals equation is: ； In the formula, P1 is the first pressure, T1 is the first ambient temperature, V2 is the second volume, and n1 is the first molar amount; The third van der Waals equation is: ； In the formula, P2 is the second pressure, and T2 is the second ambient temperature.

3. The fully automatic gas exchange method for mixed gases according to claim 1, characterized in that, The formula for calculating the second molar amount is: ； In the formula, n2 is the second molar quantity, V2 is the second volume, and P p T3 is the first preset pressure value, T3 is the third ambient temperature, a and b are the van der Waals constants of the first gas, and R is the ideal gas constant.

4. The fully automatic gas exchange method for mixed gases according to claim 1, characterized in that, Step S9 specifically includes: Based on the weight change of the first gas cylinder before step S2 and after step S7, calculate the third molar amount of the first gas in the first gas cylinder after step S6. The loss of the first gas is calculated using the first molar amount, the second molar amount, and the third molar amount.

5. The fully automatic gas exchange method for mixed gases according to claim 4, characterized in that, The formula for calculating the loss is: ； In the formula, W represents the loss amount, n1 represents the first molar amount, n2 represents the second molar amount, and n3 represents the third molar amount.

6. A terminal device, characterized in that, Includes processor, memory, and fully automatic gas exchange system for mixed gases; The fully automatic mixed gas exchange device includes: an interface for the equipment to be exchanged, a first solenoid valve, a first air pump, a second solenoid valve, a calibrated compressed air chamber, a thermometer, a first pressure gauge, a second air pump, a third solenoid valve, a first interface, a fourth solenoid valve, and a second interface, all connected by pipelines. The interface for the device to be ventilated is used to connect the gas chamber of the device to be ventilated to the pipeline; the first interface is used to connect the first gas cylinder to the pipeline; and the second interface is used to connect the second gas cylinder to the pipeline. The first solenoid valve is provided with a first end for communicating with the interface of the air exchange device, and a second end for communicating with the third end of the first air pump; The second solenoid valve is provided with a fifth end for communicating with the fourth end of the first air pump, and a sixth end for communicating with the seventh end of the calibrated compressed air chamber. The calibration compressed air chamber is equipped with a first pressure gauge and a thermometer; The second air pump is provided with a ninth end for communicating with the eighth end of the calibrated compressed air chamber, and a tenth end for communicating with the eleventh end of the third solenoid valve. The third solenoid valve is provided with a twelfth terminal for communicating with the first interface; The fourth solenoid valve is provided with a thirteenth end for connecting to the pipeline between the first air pump and the second solenoid valve, and a fourteenth end for connecting to the second interface. The memory is used to store program code and transmit the program code to the processor; The processor is connected to the fully automatic mixed gas exchange device and is used to control the fully automatic mixed gas exchange device to perform the fully automatic mixed gas exchange method as described in any one of claims 1 to 5 according to the instructions in the program code.

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