Gas mixing method of gas inlet system and gas inlet system
By calculating the correspondence between the gas and the gas injection chamber and optimizing the gas injection process, the problems of excessively high local pressure and low efficiency in multi-component high-pressure gas mixing were solved, achieving efficient and safe gas mixing and reducing equipment costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-07
- Publication Date
- 2026-03-24
AI Technical Summary
Existing multi-component high-pressure gas mixing technology is prone to causing excessively high local pressure or low operating efficiency, affecting the accuracy of gas mixing and system safety. In addition, high-precision mass flow controllers are expensive and have limited pressure resistance.
By acquiring information about the gas and the container, the corresponding relationship between the gas supply and the container is calculated. The gas source is controlled to supply gas into the container, and the gas is mixed using a gas mixing device to avoid local pressure exceeding the pressure limits of the gas source and the container. Volume and pressure detection devices are used to optimize the gas supply process.
This ensures that the pressure in each containment chamber does not exceed the limit during the high-pressure gas mixing process, improving operating efficiency and gas mixing accuracy, and reducing equipment costs.
Smart Images
Figure CN121715074A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of multi-component high-pressure air mixing technology, specifically providing an air mixing method and an air intake system. Background Technology
[0002] In fields such as high-pressure adsorption analysis, catalytic reaction research, and new material development, it is often necessary to prepare high-pressure mixed gases with specific component ratios to simulate real-world conditions or study the gas adsorption characteristics of materials. Currently, the conventional technique for achieving multi-component gas mixing mainly relies on a mass flow controller combined with a back pressure valve. This approach achieves mixing by setting the flow rates of each component gas and applying back pressure. While widely used under conventional pressures, it has significant limitations. On the one hand, high-precision mass flow controllers are expensive, and the system complexity is proportional to the number of gas components, resulting in high overall costs. On the other hand, the pressure resistance of the mass flow controller itself is limited, making it difficult to directly apply to high-pressure environments, thus restricting its use in high-pressure research scenarios.
[0003] Furthermore, while alternative methods based on static volume and pressure control exist, a key challenge in handling multi-component high-pressure gas mixtures is how to efficiently and accurately introduce each component gas into a system with a limited volume, while ensuring that the pressure at each step does not exceed the gas source's upper limit. Improper operation can easily lead to excessively high local pressures or low operational efficiency, affecting the accuracy of gas mixing and system safety.
[0004] In view of this, a new technical solution is needed in this field to solve the above problems. Summary of the Invention
[0005] The present invention aims to solve the above-mentioned technical problems, namely, to solve the problem that existing multi-component high-pressure gas mixing can easily lead to excessively high local pressure or low operating efficiency, affecting the accuracy of gas mixing and system safety.
[0006] In a first aspect, the present invention provides a method for mixing gases in an intake system, comprising: a gas source for supplying gas to the intake system, the gas including a first gas and at least one second gas; the intake system comprising: an intake pipe connected to the gas source; a receiving cavity directly or indirectly connected to the intake pipe for containing gas, the receiving cavity including a first receiving cavity and at least one second receiving cavity; a mixing pipe connected to the first receiving cavity and the second receiving cavity, and provided with a mixing device for mixing the gases in the first receiving cavity and the second receiving cavity; the mixing method comprising: acquiring mixing information of the first gas and the second gas; acquiring the volumes of the first receiving cavity and the second receiving cavity. Information; based on the mixing information of the first gas and the second gas and the volume information of the first and second accommodating cavities, obtain the pressure information after the first gas or the second gas is respectively introduced into the first accommodating cavity or the second accommodating cavity; based on the pressure information, obtain the gas injection correspondence between the first gas, the second gas and the first accommodating cavity and the second accommodating cavity respectively; based on the gas injection correspondence between the first gas, the second gas and the first accommodating cavity and the second accommodating cavity respectively, control the gas source to inject the corresponding gas into the first accommodating cavity and the second accommodating cavity respectively; control the mixing device to mix the gases in the first accommodating cavity and the second accommodating cavity.
[0007] In a preferred embodiment of the above-mentioned air mixing method for the intake system, the step "obtaining the mixing information of the first gas and the second gas" further includes: obtaining the type information, quantity information, ratio information, temperature information, and pressure information after mixing of the first gas and the second gas.
[0008] In a preferred embodiment of the above-described air mixing method for the intake system, the step "obtaining the volume information of the first and second accommodating cavities" further includes: obtaining the volume information of the first and second accommodating cavities through data preset in a database.
[0009] In a preferred embodiment of the air mixing method of the above-mentioned air intake system, the air intake system further includes a volume measuring device, and the step of "obtaining the volume information of the first accommodating cavity and the second accommodating cavity" further includes: obtaining the volume information of the first accommodating cavity and the second accommodating cavity through the volume measuring device, wherein the volume measuring device is one or more of an optical sensor, a visual sensor, and a distance measuring sensor.
[0010] In a preferred embodiment of the above-described air mixing method for the air intake system, the air intake system further includes a pressure detection device. The step of "obtaining pressure information after the first gas or the second gas is respectively introduced into the first cavity or the second cavity based on the air mixing information of the first gas and the second gas and the volume information of the first cavity and the second cavity" further includes: introducing gas into the first cavity and the second cavity respectively based on the air mixing information of the first gas and the second gas; and controlling the pressure detection device to obtain the pressure information in the first cavity and the second cavity.
[0011] In a preferred embodiment of the above-mentioned air mixing method for the intake system, the step "obtaining the gas injection correspondence between the first gas and the second gas and the first and second accommodating cavities respectively based on the pressure information" further includes: comparing the pressure in the first and second accommodating cavities with a preset pressure; if the pressure in the first and second accommodating cavities is less than the preset pressure, then confirming that the current gas injection correspondence is the gas injection correspondence between the first gas and the second gas and the first and second accommodating cavities respectively.
[0012] In a preferred embodiment of the above-mentioned air mixing method for the intake system, the step "based on the gas injection correspondence between the first gas and the second gas and the first and second accommodating cavities respectively, control the gas source to inject the corresponding gas into the first and second accommodating cavities respectively" further includes: based on the gas injection correspondence between the first gas and the second gas and the first and second accommodating cavities respectively, control the gas source to inject the corresponding gas into the first and second accommodating cavities respectively through the intake pipe.
[0013] In a preferred embodiment of the above-described air mixing method for the air intake system, the air intake pipeline includes a first air intake pipeline and at least one second air intake pipeline. A first air intake valve and a second air intake valve are respectively installed on the first air intake pipeline and the second air intake pipeline. The first and second accommodating cavities each include a first valve assembly and a second valve assembly. The air intake system further includes a vacuum pumping device connected to the air intake pipeline. The step "Based on the gas injection correspondence between the first gas and the second gas and the first and second accommodating cavities respectively, control the gas source to inject corresponding gases into the first and second accommodating cavities respectively" is described. The "gas" further includes: based on the gas-feeding correspondence between the first gas and the second gas and the first and second accommodating cavities respectively, controlling the second inlet valve and the first valve assembly to open, controlling the gas source to inject the corresponding gas into the second accommodating cavity through the second inlet pipe; controlling the second inlet valve and the first valve assembly to close; controlling the vacuuming device to start and run for a first preset time; controlling the first inlet valve and the first valve assembly to open, controlling the gas source to inject the corresponding gas into the first accommodating cavity through the first inlet pipe; and controlling the first inlet valve and the first valve assembly to close.
[0014] In a preferred embodiment of the above-described air mixing method for the intake system, the first and second accommodating cavities respectively include a first valve assembly and a second valve assembly. The step of "controlling the mixing device to mix the gases in the first and second accommodating cavities" further includes: controlling the first and second valve assemblies to open, connecting the first and second accommodating cavities to the mixing pipeline; and controlling the mixing device to open to mix the gases in the first and second accommodating cavities.
[0015] In a preferred embodiment of the above-described air mixing method for the intake system, the step "obtaining pressure information of the first gas or the second gas after it is respectively introduced into the first or second cavity based on the mixing information of the first gas and the second gas and the volume information of the first cavity and the second cavity" further includes: obtaining the molar density c of the mixed gas based on the temperature of the first gas and the second gas and the pressure after mixing. m Based on the volume information of the first and second accommodating cavities, using formula c m =n m / V m The amount of substance n of the mixed gas m V m The total volume of the first and second cavities; based on the ratio of the first and second gases after mixing and the amount of substance n of the mixed gas. mObtain the amounts n1 and n2 of the first gas and the second gas to be added, respectively; obtain the molar density c of the first gas or the second gas after being added to the first container or the second container, respectively, using the formula c=n / V; obtain the pressure information in the first container and the second container based on the temperature of the first gas and the second gas and the molar density c of the first gas or the second gas after being added to the first container or the second container, respectively.
[0016] In a preferred embodiment of the above-described air mixing method for the intake system, the step "based on the mixing information of the first gas and the second gas and the volume information of the first and second accommodating cavities, obtaining the pressure information after the first gas or the second gas is respectively introduced into the first accommodating cavity or the second accommodating cavity" further includes: arranging and combining various gas introduction correspondences of the first gas or the second gas respectively introduced into the first accommodating cavity or the second accommodating cavity; and obtaining the maximum value of the pressure in the first accommodating cavity and the second accommodating cavity under each arrangement and combination.
[0017] In a preferred embodiment of the above-mentioned air mixing method for the intake system, the step "obtaining the gas injection correspondence between the first gas and the second gas and the first and second accommodating cavities respectively based on the pressure information" further includes: sorting the maximum values of the pressure in the first and second accommodating cavities under each permutation combination; and taking the permutation combination with the smallest maximum value of the pressure in the first and second accommodating cavities as the gas injection correspondence between the first gas and the second gas and the first and second accommodating cavities respectively.
[0018] In a second aspect, the present invention also provides an intake system, comprising: a gas source for supplying gas to the intake system, the gas including a first gas and at least one second gas; the intake system comprising: an intake pipe connected to the gas source, including a first intake pipe and at least one second intake pipe, wherein a first intake valve and a second intake valve are respectively provided on the first intake pipe and the second intake pipe; a receiving cavity directly or indirectly connected to the intake pipe for receiving gas, the receiving cavity including a first receiving cavity and at least one second receiving cavity, wherein the first receiving cavity and the second receiving cavity respectively include a first valve assembly and a second valve assembly; a mixing pipe connected to the first receiving cavity and the second receiving cavity, and provided with a mixing device for mixing the gas in the first receiving cavity and the second receiving cavity; a vacuuming device connected to the intake pipe; a volume measuring device and a pressure detecting device, and capable of performing the mixing method of the intake system described in any one of the above embodiments.
[0019] By employing the above technical solution, the gas mixing method of the air intake system of the present invention calculates the pressure in each cavity under each arrangement and combination of the correspondence between various gases and each receiving cavity before actual gas injection. Then, based on the calculated pressure values, the optimal gas injection correspondence between various gases and each receiving cavity (i.e., the one with the lowest maximum local pressure required during gas injection) is selected, and actual gas injection is then carried out according to this correspondence. Since the pressure in each receiving cavity is pre-calculated before actual gas injection, it ensures that the pressure in each receiving cavity does not exceed the upper limit of the gas source pressure, nor does it exceed the upper limit of the pressure resistance of each container. This solves the problem of limited overall gas mixing pressure and low operating efficiency caused by local pressure limitations in existing multi-component high-pressure gas mixing, which affects the accuracy of gas mixing and system safety. Furthermore, the gas mixing method of the present invention avoids the use of a mass flow controller, significantly reducing the overall cost of the equipment. Attached Figure Description
[0020] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which: Figure 1 This is a schematic diagram of the air intake system of the present invention; Figure 2 This is a flowchart of the main control method of the present invention; Figure 3 This is a flowchart of step S11; Figure 4 This is a flowchart of steps S21 and S22; Figure 5 This is a flowchart of steps S31-S35; Figure 6 This is a flowchart of steps S36 and S37; Figure 7 This is a flowchart of steps S41 and S42; Figure 8 This is a flowchart of steps S51-S57; Figure 9 This is a flowchart of steps S61 and S62; Figure 10 This is a flowchart of steps S38 and S39; Figure 11 This is a flowchart of steps S43 and S44; Figure 12 This is the flowchart for step S58.
[0021] List of reference numerals in the attached diagram: 1. Intake system; 11. First intake pipe; 111. First intake valve; 12. Second intake pipe; 121. Second intake valve; 13. Third intake pipe; 131. Third intake valve; 14. First receiving cavity; 141. First valve assembly; 15. Second receiving cavity; 151. Second valve assembly; 16. Third receiving cavity; 161. Third valve assembly; 17. Mixing pipe; 171. Mixing device; 18. Vacuuming device. Detailed Implementation
[0022] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the invention and are not intended to limit the scope of protection of the invention. Those skilled in the art can make adjustments as needed to adapt to specific applications.
[0023] It should be noted that in the description of this invention, the terms "upper," "lower," "left," "right," "front," and "rear," etc., indicating directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0024] like Figures 1-9 As shown, to address the problems of limited overall mixing pressure and low operating efficiency caused by local pressure limitations in existing multi-component high-pressure gas mixing systems, which affect mixing accuracy and system safety, the present invention provides an intake system 1 comprising: The intake pipe is connected to the air source and includes a first intake pipe 11, a second intake pipe 12 and a third intake pipe 13. A first intake valve 111, a second intake valve 121 and a third intake valve 131 are respectively provided on the first intake pipe 11, the second intake pipe 12 and the third intake pipe 13.
[0025] The receiving cavity is directly or indirectly connected to the intake pipe and is used to contain gas. The receiving cavity includes a first receiving cavity 14, a second receiving cavity 15 and a third receiving cavity 16. The first receiving cavity 14, the second receiving cavity 15 and the third receiving cavity 16 respectively include a first valve assembly 141, a second valve assembly 151 and a third valve assembly 161.
[0026] The gas mixing pipeline 17 is connected to the first receiving cavity 14, the second receiving cavity 15 and the third receiving cavity 16, and is equipped with a gas mixing device 171 (which may be a gas mixing pump or other common gas flow promoting device such as a fan) for mixing the gases in the first receiving cavity 14, the second receiving cavity 15 and the third receiving cavity 16.
[0027] A vacuum pump 18 (such as a vacuum pump or other common vacuum pump 18) is connected to an air intake line.
[0028] In addition, an air source is provided outside the intake system 1 for supplying gas to the intake system 1, the gas including a first gas, a second gas and a third gas.
[0029] The air mixing method of the intake system 1 of the present invention includes: S1. Obtain the mixing information of the first gas, the second gas, and the third gas; S2. Obtain the volume information of the first receiving cavity 14, the second receiving cavity 15, and the third receiving cavity 16; S3. Based on the gas mixing information of the first gas, the second gas and the third gas, and the volume information of the first receiving cavity 14, the second receiving cavity 15 and the third receiving cavity 16, obtain multiple sets of pressure information after the first gas, the second gas or the third gas is respectively put into the first receiving cavity 14, the second receiving cavity 15 or the third receiving cavity 16. S4. Based on pressure information, obtain the optimal gas injection correspondence between the first gas, the second gas, and the third gas and the first receiving cavity 14, the second receiving cavity 15, and the third receiving cavity 16, respectively. S5. Based on the gas injection correspondence between the first gas, the second gas, and the third gas and the first receiving cavity 14, the second receiving cavity 15, and the third receiving cavity 16 respectively, control the gas source to inject the corresponding gas into the first receiving cavity 14, the second receiving cavity 15, and the third receiving cavity 16 respectively. S6. Control the gas mixing device 171 to mix the gases in the first receiving chamber 14, the second receiving chamber 15, and the third receiving chamber 16.
[0030] In the above steps, step S1 further includes: S11. Obtain information on the type, quantity, ratio, temperature, and pressure of the first, second, and third gases after mixing.
[0031] Step S2 further includes: S21. Obtain the volume information of the first receiving cavity 14, the second receiving cavity 15, and the third receiving cavity 16 by means of data preset in the database; or, S22. Obtain volume information of the first receiving cavity 14, the second receiving cavity 15 and the third receiving cavity 16 through a volume measuring device, wherein the volume measuring device is one or more of an optical sensor, a vision sensor and a distance measuring sensor.
[0032] Step S3 further includes: S31. Obtain the molar density c of the mixed gas based on the temperatures of the first gas, the second gas, and the third gas, and the pressure after mixing.m ; S32. Based on the volume information of the first receiving cavity 14, the second receiving cavity 15, and the third receiving cavity 16, using formula c m =n m / V m The amount of substance n of the mixed gas m V m The total volume of the first receiving cavity 14, the second receiving cavity 15, and the third receiving cavity 16; S33, Based on the proportions of the first gas, the second gas, and the third gas after mixing, and the amount of substance n of the mixed gas. m Obtain the amounts n1, n2, and n3 of the first gas, the second gas, and the third gas to be added, respectively. S34. Obtain the molar density c of the first gas, the second gas, or the third gas after they are respectively introduced into the first container 14, the second container 15, or the third container 16 using the formula c=n / V. S35. Based on the temperatures of the first gas, the second gas, and the third gas, and the molar density c after the first gas, the second gas, or the third gas is introduced into the first container 14, the second container 15, or the third container 16 respectively, obtain the pressure information in the first container 14, the second container 15, and the third container 16.
[0033] Step S3 also includes: S36. Arrange and combine the various gas injection correspondences of the first gas, the second gas, or the third gas into the first receiving cavity 14, the second receiving cavity 15, or the third receiving cavity 16 respectively. S37. Obtain the maximum pressure in the first cavity 14, the second cavity 15 and the third cavity 16 under each permutation and combination.
[0034] Step S4 further includes: S41. Sort the maximum values of the pressure in the first cavity 14, the second cavity 15 and the third cavity 16 under each permutation and combination; S42. The arrangement of the first, second, and third accommodating cavities 14, 15, and 16 with the minimum maximum pressure is the optimal gas injection correspondence between the first gas, the second gas, and the third gas and the first, second, and third accommodating cavities 14, 15, and 16, respectively.
[0035] Step S5 further includes: S51. Based on the gas injection correspondence between the first gas, the second gas, and the third gas and the first receiving cavity 14, the second receiving cavity 15, and the third receiving cavity 16 respectively, control the second air inlet valve 121 and the first valve assembly 141 to open, and control the gas source to inject the corresponding gas into the second receiving cavity 15 through the second air inlet pipe 12. S52, Control the second intake valve 121 and the first valve assembly 141 to close; S53. Control the vacuum pumping device 18 to start and run for the first preset time; S54. Control the first intake valve 111 and the first valve assembly 141 to open, and control the gas source to inject the corresponding gas into the first receiving cavity 14 through the first intake pipe 11. S55, Control the first intake valve 111 and the first valve assembly 141 to close; S56. Control the vacuum pumping device 18 to start and run for the first preset time; S57, control the third intake valve 131 and the third valve assembly 161 to open, and control the gas source to inject the corresponding gas into the third receiving cavity 16 through the third intake pipe 13.
[0036] Step S6 further includes: S61, control the first valve assembly 141, the second valve assembly 151 and the third valve assembly 161 to open, and connect the first receiving cavity 14, the second receiving cavity 15 and the third receiving cavity 16 to the mixing pipeline 17. S62, control the gas mixing device 171 to open and mix the gases in the first receiving chamber 14, the second receiving chamber 15 and the third receiving chamber 16.
[0037] In the above-described implementation, the gas mixing information is first obtained, taking a mixture of three gases (e.g., nitrogen:helium:ethane equal to 1:2:3) as an example. After obtaining the types, quantities, and proportions of the gases, the temperature information within the intake system 1 can be obtained through a temperature sensor, and the target pressure information after mixing can be obtained through user settings. The volume information of the first receiving cavity 14, the second receiving cavity 15, and the third receiving cavity 16 can be obtained by searching in a database or by measuring with a volume detection device. (It is worth mentioning that during the gas mixing process, the pressure of the mixed gas will decrease due to the vacuum state of the mixing pipeline 17. Therefore, in this embodiment, the volume of the mixing pipeline 17 is included in the calculation of the first receiving cavity 14 or the third receiving cavity 16. At the same time, when gas is introduced into the first receiving cavity 14 or the third receiving cavity 16, gas is also left in the mixing pipeline 17.) The sum of the three volumes is the volume of the mixed gas.
[0038] Before introducing the gases, the amounts of each gas to be introduced need to be calculated. Given the temperature of the intake system 1 and the target pressure after mixing, the molar density c of the mixed gas can be directly obtained by looking up a table. m Meanwhile, in the total volume V of the three accommodating cavities m Given the information, we can use formula c m =n m / V mThe total amount of substance n of the mixed gas can then be obtained. m Since the percentage of each substance remains unchanged after the gases are mixed, and the percentages of each of the three gases are known, the total amount of substance n in the gas mixture can be calculated. m By determining the proportions of the three gases, the required amounts of each gas (n1, n2, n3) can be calculated. Next, the known amounts of the three gases need to be added into the three containers.
[0039] The gas mixing pipeline 17 can also exist as a separate receiving chamber, resulting in four receiving chambers. Since there are only three gases, the four receiving chambers need to be combined into three. The combinations of the three receiving chambers with the gas mixing pipeline 17 are arranged as follows: the third receiving chamber 16 can be combined with the second receiving chamber 15, the second receiving chamber 15 can be combined with the first receiving chamber 14, and the gas mixing pipeline 17 can only be combined with either the first receiving chamber 14 or the third receiving chamber 16. This results in four possible combinations of receiving chambers. Combining the three gases with the three receiving chambers yields six possible combinations, resulting in a total of 4 × 6 = 24 arrangements. The molar density c after gas injection in each receiving chamber under each arrangement is calculated using the formula c = n / V (where n and V are known). Given the temperature and molar density c, the pressure information after gas injection in each receiving chamber under each arrangement can be obtained by consulting a database. After obtaining the pressure information, the maximum values of the pressure in each cavity under each permutation and combination are sorted, and the optimal solution is the correspondence between the three gases and the three cavities in the permutation and combination with the smallest maximum value.
[0040] After determining the correspondence between the three gases and the three receiving cavities, the gas injection process is carried out, taking the combination of the mixing pipeline 17 and the third receiving cavity 16 as an example. First, the second inlet valve 121 and the first valve assembly 141 are opened, and the second valve assembly 151 is closed. The gas source is controlled to inject the corresponding gas into the second receiving cavity 15 through the second inlet pipeline 12. After the gas injection is completed, the second inlet valve 121 and the first valve assembly 141 are closed. The vacuum pumping device 18 is started and runs for a first preset time to evacuate the gas in the inlet pipeline and the mixing pipeline 17. Then, the first inlet valve 111 and the first valve assembly 141 are opened, and the gas source is controlled to inject the corresponding gas into the first receiving cavity 14 through the first inlet pipeline 11. After the gas injection is completed, the first inlet valve 111 and the first valve assembly 141 are closed, and the vacuum pumping device 18 is started and runs for a first preset time to evacuate the gas in the inlet pipeline and the mixing pipeline 17. Finally, the third intake valve 131 and the third valve assembly 161 are opened, allowing the gas source to inject the corresponding gas into the third receiving chamber 16 (which merges with the mixing pipeline 17) through the third intake pipe 13. After the gas injection is completed, the first valve assembly 141, the second valve assembly 151, and the third valve assembly 161 are opened, connecting the first receiving chamber 14, the second receiving chamber 15, and the third receiving chamber 16 to the mixing pipeline 17. Then, the mixing device 171 is opened to mix the gases in the first receiving chamber 14, the second receiving chamber 15, and the third receiving chamber 16, thus completing the proportional mixing of the three gases.
[0041] The advantages of the above-described embodiments are as follows: The gas mixing method of the air intake system 1 of the present invention, by arranging and combining the correspondence between various gases and each receiving cavity before actual gas injection, calculates the maximum pressure in each receiving cavity under each arrangement and combination, and then sorts these maximum values, selecting the combination with the smallest maximum value for actual gas injection. Since the maximum pressure in each receiving cavity is pre-calculated and its minimum value is taken before actual gas injection, the optimal solution among all arrangements and combinations is selected, thereby ensuring that the pressure in each receiving cavity does not exceed the pressure limit of the gas source. This solves the problem that existing multi-component high-pressure gas mixing easily leads to excessively high local pressure or low operating efficiency, affecting the accuracy of gas mixing and system safety. In addition, the gas mixing method of the present invention avoids the use of a mass flow controller, significantly reducing the overall cost of the equipment.
[0042] Furthermore, regarding the combination of the intake pipe, the mixing pipe 17, and each receiving cavity, those skilled in the art will understand that the gas injection sequence of the receiving cavity combined with the intake pipe and the mixing pipe 17 should be last to avoid occupying the intake pipe and the mixing pipe 17. In addition, although the above description uses three gases as an example, the present invention is not limited to these three gases; other combinations of gases in different types, quantities, and proportions can also be used. These combinations do not exceed the technical principles of the present invention and are therefore also included within the scope of protection of the present invention.
[0043] In addition, such as Figure 10 As shown, in one possible implementation, the intake system 1 further includes a pressure detection device, and step S3 further includes: S38. Based on the gas mixing information of the first gas, the second gas and the third gas, gas is injected into the first receiving cavity 14, the second receiving cavity 15 and the third receiving cavity 16 respectively; S39. Control the pressure detection device to obtain pressure information in the first receiving cavity 14, the second receiving cavity 15 and the third receiving cavity 16.
[0044] Unlike the above implementation, this implementation introduces three types of gas into three chambers respectively, and uses a pressure detection device (such as a pressure sensor) to directly obtain the pressure information in the three chambers after the gas is introduced to determine whether there is a situation where the pressure value is too high.
[0045] In one possible implementation, such as Figure 11 , Figure 12 As shown, step S4 further includes: S43. Compare the pressure in the first receiving cavity 14, the second receiving cavity 15, and the third receiving cavity 16 with the preset pressure; S44. If the pressure in the first receiving cavity 14, the second receiving cavity 15, and the third receiving cavity 16 is less than the preset pressure, then the current gas injection correspondence is confirmed as the gas injection correspondence between the first gas, the second gas, and the third gas and the first receiving cavity 14, the second receiving cavity 15, and the third receiving cavity 16, respectively.
[0046] Step S5 further includes: S58. Based on the gas injection correspondence between the first gas, the second gas, and the third gas and the first receiving cavity 14, the second receiving cavity 15, and the third receiving cavity 16 respectively, control the gas source to inject the corresponding gas into the first receiving cavity 14, the second receiving cavity 15, and the third receiving cavity 16 respectively through the gas inlet pipe.
[0047] Unlike the aforementioned implementation methods, this implementation method does not sort the maximum pressure values in each containment cavity. Instead, it directly compares them with the preset pressure. If the pressure in each containment cavity is less than the preset pressure value, the current gas injection correspondence is directly taken as the gas injection correspondence between the first gas, the second gas, and the third gas and the first containment cavity 14, the second containment cavity 15, and the third containment cavity 16, respectively. Although this method is not optimal, it can still avoid the situation where the pressure in the containment cavity is higher than the gas source pressure.
[0048] Those skilled in the art will understand that the above-described intake system also includes other known structures, such as processors, controllers, and memories. These memories include, but are not limited to, random access memory (RAM), flash memory, read-only memory (ROM), programmable read-only memory (PROM), volatile memory, non-volatile memory, serial memory, parallel memory, or registers. Processors include, but are not limited to, CPLD / FPGA, DSP, ARM processors, and MIPS processors. To avoid unnecessarily obscuring the embodiments of this disclosure, these known structures are not shown in the accompanying drawings.
[0049] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.
Claims
1. A method for mixing air in an intake system (1), characterized in that, include: A gas source for supplying gas to the intake system (1), the gas comprising a first gas and at least one second gas; The intake system (1) includes: An intake pipe is connected to the air source; The receiving cavity is directly or indirectly connected to the air intake pipe and is used to receive gas. The receiving cavity includes a first receiving cavity (14) and at least one second receiving cavity (15). A gas mixing pipeline (17) is connected to the first receiving cavity (14) and the second receiving cavity (15), and a gas mixing device (171) is provided to mix the gases in the first receiving cavity (14) and the second receiving cavity (15); The gas mixing method includes: Obtain the mixing information of the first gas and the second gas; Obtain the volume information of the first receiving cavity (14) and the second receiving cavity (15); Based on the gas mixing information of the first gas and the second gas, as well as the volume information of the first container (14) and the second container (15), the pressure information of the first gas or the second gas after being put into the first container (14) or the second container (15) respectively is obtained. Based on the pressure information, the gas supply correspondence between the first gas and the second gas and the first receiving cavity (14) and the second receiving cavity (15) is obtained respectively; Based on the gas supply correspondence between the first gas and the second gas and the first receiving cavity (14) and the second receiving cavity (15) respectively, the gas source is controlled to supply the corresponding gas into the first receiving cavity (14) and the second receiving cavity (15) respectively; The gas mixing device (171) is controlled to mix the gases in the first receiving chamber (14) and the second receiving chamber (15).
2. The air mixing method of the intake system (1) according to claim 1, characterized in that, The step "obtaining the mixing information of the first gas and the second gas" further includes: Obtain information on the type, quantity, ratio, temperature, and pressure of the first and second gases after mixing.
3. The air mixing method of the intake system (1) according to claim 1, characterized in that, The step "obtaining the volume information of the first receiving cavity (14) and the second receiving cavity (15)" further includes: The volume information of the first receiving cavity (14) and the second receiving cavity (15) is obtained by using data preset in the database.
4. The air mixing method of the intake system (1) according to claim 1, characterized in that, The intake system (1) also includes a volume measuring device, and the step of "obtaining the volume information of the first accommodating cavity (14) and the second accommodating cavity (15)" further includes: The volume information of the first receiving cavity (14) and the second receiving cavity (15) is obtained by the volume measuring device, wherein the volume measuring device is one or more of an optical sensor, a visual sensor, and a distance measuring sensor.
5. The air mixing method of the intake system (1) according to claim 1, characterized in that, The intake system (1) further includes a pressure detection device, and the step "based on the mixing information of the first gas and the second gas and the volume information of the first accommodating cavity (14) and the second accommodating cavity (15), obtain the pressure information after the first gas or the second gas is respectively introduced into the first accommodating cavity (14) or the second accommodating cavity (15)" further includes: Based on the mixing information of the first gas and the second gas, gas is injected into the first receiving cavity (14) and the second receiving cavity (15) respectively; The pressure detection device is controlled to acquire pressure information in the first accommodating cavity (14) and the second accommodating cavity (15).
6. The air mixing method of the intake system (1) according to claim 1, characterized in that, The step "obtaining the gas supply correspondence between the first gas, the second gas and the first receiving cavity (14), and the second receiving cavity (15) respectively based on the pressure information" further includes: Compare the pressures in the first receiving cavity (14) and the second receiving cavity (15) with the preset pressure; If the pressure in the first accommodating cavity (14) and the second accommodating cavity (15) is less than the preset pressure, then the current gas injection correspondence is confirmed as the gas injection correspondence between the first gas and the second gas and the first accommodating cavity (14) and the second accommodating cavity (15), respectively.
7. The air mixing method of the intake system (1) according to claim 1, characterized in that, The step "based on the gas supply correspondence between the first gas and the second gas and the first receiving cavity (14) and the second receiving cavity (15) respectively, controlling the gas source to supply the corresponding gas into the first receiving cavity (14) and the second receiving cavity (15) respectively" further includes: Based on the gas supply correspondence between the first gas and the second gas and the first receiving cavity (14) and the second receiving cavity (15), respectively, the gas source is controlled to supply the corresponding gas into the first receiving cavity (14) and the second receiving cavity (15) through the gas inlet pipe.
8. The air mixing method of the intake system (1) according to claim 1, characterized in that, The air intake pipeline includes a first air intake pipeline (11) and at least one second air intake pipeline (12). The first air intake pipeline (11) and the second air intake pipeline (12) are respectively provided with a first air intake valve (111) and a second air intake valve (121). The first accommodating cavity (14) and the second accommodating cavity (15) respectively include a first valve assembly (141) and a second valve assembly (151). The air intake system (1) also includes a vacuum pumping device (18). The vacuum pumping device (18) is connected to the air intake pipeline. The step "based on the gas injection correspondence between the first gas and the second gas and the first accommodating cavity (14) and the second accommodating cavity (15), control the gas source to inject the corresponding gas into the first accommodating cavity (14) and the second accommodating cavity (15) respectively" further includes: Based on the gas supply correspondence between the first gas and the second gas and the first receiving cavity (14) and the second receiving cavity (15) respectively, the second air inlet valve (121) and the first valve assembly (141) are controlled to open, and the gas source is controlled to supply the corresponding gas into the second receiving cavity (15) through the second air inlet pipe (12); The second intake valve (121) and the first valve assembly (141) are closed. Control the vacuum pumping device (18) to start and run for a first preset time; Control the opening of the first intake valve (111) and the first valve assembly (141), and control the gas source to inject the corresponding gas into the first accommodating cavity (14) through the first intake pipe (11); Control the first intake valve (111) and the first valve assembly (141) to close.
9. The air mixing method of the intake system (1) according to claim 1, characterized in that, The first receiving cavity (14) and the second receiving cavity (15) respectively include a first valve assembly (141) and a second valve assembly (151). The step "controlling the gas mixing device (171) to mix the gases in the first receiving cavity (14) and the second receiving cavity (15)" further includes: Control the opening of the first valve assembly (141) and the second valve assembly (151) to connect the first receiving cavity (14) and the second receiving cavity (15) to the mixing pipeline (17); The gas mixing device (171) is controlled to open and mix the gases in the first receiving chamber (14) and the second receiving chamber (15).
10. An intake system (1), characterized in that, include: A gas source for supplying gas to the intake system (1), the gas comprising a first gas and at least one second gas; The intake system (1) includes: An air intake pipe, connected to the air source, includes a first air intake pipe (11) and at least one second air intake pipe (12), wherein a first air intake valve (111) and a second air intake valve (121) are respectively provided on the first air intake pipe (11) and the second air intake pipe (12). The receiving cavity is directly or indirectly connected to the air intake pipe and is used to receive gas. The receiving cavity includes a first receiving cavity (14) and at least one second receiving cavity (15). The first receiving cavity (14) and the second receiving cavity (15) respectively include a first valve assembly (141) and a second valve assembly (151). A gas mixing pipeline (17) is connected to the first receiving cavity (14) and the second receiving cavity (15), and a gas mixing device (171) is provided to mix the gases in the first receiving cavity (14) and the second receiving cavity (15); A vacuum pumping device (18) is connected to the air intake pipe; The volume measuring device and pressure detection device are capable of performing the air mixing method of the intake system (1) according to any one of claims 1-9.