Automatic gas distribution system suitable for detection of various gases and gas distribution method thereof

Abstract

The invention discloses an automatic gas distribution system suitable for detection of various gases and a gas distribution method of the automatic gas distribution system, and belongs to the technical field of dynamic gas distribution. The automatic gas distribution system is simple in structure, and quick switching of various to-be-detected gases can be realized by controlling on-off cooperation of the four-way valve and each gas path; on the basis of the idea of immediate preparation and immediate use, gas distribution testing of easily decomposed gas or volatile gas such as ozone is realized, and a recovery process of an environmental baseline is added in a gas distribution testing process, so that gas in a testing cavity can be in an initial state before and after sensor testing; meanwhile, the four-way valve is combined with premixing flow control, so that gas is premixed in the mixing cavity before entering the testing cavity for sensor testing, mutual pollution of gas in the pipeline before and after gas switching is further avoided in the premixing process, gas mixing is more uniform, errors are reduced, and therefore sensor testing is more accurate.

Description

Technical Field

[0001] The present application belongs to the field of dynamic gas distribution technology, and more specifically, relates to an automatic gas distribution system and a gas distribution method thereof suitable for detecting multiple gases. Background Art

[0002] Gas sensors are of great significance in improving industrial production safety, environmental protection, public safety, etc. Moreover, with the advancement of technology, their application areas are constantly expanding, playing a positive role in promoting social development and improving the quality of human life.

[0003] When studying gas sensors, it is necessary to configure an atmosphere of the gas to be tested with a certain concentration. Dynamic gas matching technology has the advantages of being able to quickly and accurately mix gases, a variety of mixed gases, a wide range of gas matching concentrations, and continuous gas matching. It has attracted much attention from researchers in the field of gas sensors. However, the currently disclosed multi-gas automatic gas matching technology has the problem of being too complicated in switching the gases to be tested, which can easily cause mutual contamination of the switching gases, and it is only suitable for the configuration of conventional gases, such as carbon dioxide, nitric oxide, ammonia, etc. It is not very suitable for easily decomposable gases or volatile gases such as ozone. Summary of the invention

[0004] In response to the above defects or improvement needs of the prior art, the present application provides an automatic gas distribution system and a gas distribution method suitable for multiple gas detection, which aims to solve the technical problems that the current gas dynamic gas distribution technology has the problem that the switching of the gases to be tested is too complicated and easily causes mutual contamination of the gases to be tested.

[0005] To achieve the above-mentioned purpose, in a first aspect, the present application provides an automatic gas distribution system suitable for multiple gas detection, the automatic gas distribution system comprising a dilution gas source, a baseline gas circuit, a dilution gas circuit, a plurality of diluted gas circuits, a gas mixing chamber, a four-way valve and a test chamber; wherein each gas circuit is provided with a mass flow controller; the baseline gas circuit is used to configure the gas environment required for the test according to a preset initial environmental humidity;

[0006] The air outlet of the dilution gas source is connected to the air inlets of the baseline gas circuit and the dilution gas circuit;

[0007] Each diluted gas path includes a diluted gas source; the dilution gas path, the gas outlet of each diluted gas path and the gas inlet of the gas mixing chamber are connected;

[0008] The air outlets of the baseline air path and the mixing chamber are connected to the first air inlet and the second air inlet of the four-way valve respectively, the first air outlet of the four-way valve is connected to the air inlet of the test chamber; the second air outlet of the four-way valve is connected to the outside world;

[0009] When the four-way valve is opened, the first air inlet is connected to the second air outlet, and the second air inlet is connected to the first air outlet; when the four-way valve is closed, the first air inlet is connected to the first air outlet, and the second air inlet is connected to the second air outlet.

[0010] The baseline gas path includes a baseline humidification gas path, a baseline dilution gas path and a first gas mixing chamber;

[0011] The outlet of the dilution gas source is connected to the inlet of the baseline humidification gas path and the baseline dilution gas path, and the outlets of the baseline humidification gas path and the baseline dilution gas path are connected to the inlet of the first gas mixing chamber; the outlet of the first gas mixing chamber is connected to the first inlet of the four-way valve;

[0012] The baseline humidification gas circuit includes a first humidity generating device.

[0013] The automatic gas distribution system further comprises a humidification gas circuit, the gas outlet of the dilution gas source is connected to the gas inlet of the humidification gas circuit, and the gas outlet of the humidification gas circuit is connected to the gas inlet of the gas mixing chamber;

[0014] The humidifying gas circuit includes a second humidity generating device.

[0015] The multiple diluted gas paths include a volatile gas path, and the volatile gas path includes a volatile gas generating device, which is used to gasify the built-in room-temperature liquid gas to generate saturated volatile gas; the gas outlet of the volatile gas path is connected to the gas inlet of the gas mixing chamber.

[0016] The multiple diluted gas paths include an ozone gas path, which includes an ozone generator and an oxygen-containing gas source, wherein the ozone generator is used to generate ozone from the oxygen contained in the oxygen-containing gas source; the gas outlet of the ozone gas path is connected to the gas inlet of the gas mixing chamber.

[0017] The ozone generating device comprises a movable shield, a motor, an ultraviolet lamp and a lamp power supply;

[0018] The lamp power supply is used to control the luminous power of the ultraviolet lamp, so that the ultraviolet lamp generates ultraviolet light of required intensity, and the ultraviolet light irradiates the oxygen entering the ozone generating device to generate ozone;

[0019] The motor is used to control the movement of the movable shielding object, thereby changing the irradiation area of ​​the ultraviolet light.

[0020] The automatic gas distribution system also includes a feedback sensor and a controller;

[0021] The feedback sensor is located before the test chamber and is used to detect the parameters of the gas entering the test chamber; and transmit the gas parameters to the controller;

[0022] The controller is used to compare the actually collected gas parameters with the preset gas parameters, and adjust the mass flow controller of the corresponding gas path according to the difference in the parameters until the difference is zero;

[0023] The controller is also used to control the on / off of each gas path and the switch of the four-way valve in a time sequence according to a preset gas switching sequence, thereby switching each diluted gas path to finally connect to the test chamber.

[0024] Each gas circuit contains a one-way valve and a solenoid valve for controlling the on-off of the gas circuit.

[0025] In a second aspect, the present application provides a gas distribution method for an automatic gas distribution system suitable for multiple gas detections, comprising the following steps:

[0026] S1. Ensure that the baseline gas circuit is open, close all diluted gas circuits and dilution gas circuits, and close the four-way valve; the dilution gas enters the test chamber from the baseline gas circuit through the four-way valve and is then discharged;

[0027] S2, after the first preset time interval, the required diluted gas path is opened according to the preset gas switching sequence, the dilution gas path is opened, and the mass flow controllers in the dilution gas path and the diluted gas path are adjusted according to the preset gas concentration, and the diluted gas and the dilution gas are mixed in the gas mixing chamber and directly discharged through the four-way valve;

[0028] S3, after the second preset time interval, the four-way valve is opened and the baseline gas path is closed; the mixed gas in the gas mixing chamber passes through the four-way valve into the test chamber and then is discharged;

[0029] S4, after the third preset time interval, determine whether the automatic gas distribution is completed, if so, it is completed; otherwise, the baseline gas path is opened, and the diluted gas is discharged from the baseline gas path after passing through the four-way valve;

[0030] S5. After the fourth preset time interval, return to step S1.

[0031] In a third aspect, the present application provides a controller comprising: a memory for storing programs; a processor for executing the programs stored in the memory, and when the program stored in the memory is executed, the processor is used to execute the method described in the first aspect or any possible implementation of the first aspect.

[0032] In general, the above technical solutions conceived by this application have the following beneficial effects compared with the prior art:

[0033] (1) The gas switching structure of the present application is simple. By controlling the four-way valve and the switches of each gas circuit, rapid switching of the gas to be tested can be achieved. At the same time, the four-way valve is combined with the premixing process control to allow the gas to be premixed in the mixing chamber before entering the test chamber for sensor testing. The premixing process eliminates the mutual contamination of the gas in the pipeline before and after the gas switching, and at the same time makes the gas mixing more uniform, reducing errors, thereby making the sensor test more accurate.

[0034] (2) A baseline gas circuit is added to the system of the present application. By modulating the ambient gas with a preset humidity, it is ensured that the state of the sensor can be restored to the initial state before each test, just like in the formal use environment, thereby further increasing the accuracy of the sensor test.

[0035] (3) The system of the present application adopts the idea of ​​making products for immediate use, and realizes the sensor testing of easily decomposable gases or volatile gases such as ozone.

[0036] (4) Humidity control is added to the system of the present application, which can provide a humidity environment closer to the real one for sensor testing and can be used to study the effect of water vapor on the sensor.

[0037] (5) Based on the system of the present application, the present application proposes a testing method, which automatically controls each gas path through a controller, thereby realizing automatic switching of the test gas and greatly reducing manpower loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the overall structure of an automatic gas distribution system suitable for multiple gases provided in an embodiment of the present application.

[0039] Figure 2 It is a schematic diagram of the structure of the ozone generating device provided in the embodiment of the present application.

[0040] Figure 3 It is a structural schematic diagram of a controller provided in an embodiment of the present application. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0042] The terms "first", "second", etc. in the specification and claims herein are used to distinguish different objects rather than to describe a specific order of the objects. For example, a first preset time interval and a second preset time interval are used to distinguish different preset time intervals rather than to describe a specific order of the preset time intervals.

[0043] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0044] In the description of the embodiments of the present application, unless otherwise specified, the meaning of "multiple" refers to two or more than two. For example, multiple diluted gas paths refer to two or more diluted gas paths, etc.

[0045] Next, the technical solutions provided in the embodiments of the present application are introduced.

[0046] like Figure 1 As shown, an automatic gas distribution system applicable to multiple gases in an embodiment of the present application includes the following parts:

[0047] Dilution gas source 0, baseline gas circuit 1, dilution gas circuit 2, feedback sensor 3, five diluted gas circuits, gas mixing chamber 5, four-way valve 6 and test chamber 7.

[0048] In this embodiment, each of the five diluted gas paths includes a diluted gas source; thus, the sensor detection of five gases can be realized. The diluted gas path 9 produces anhydrous ethanol mixed gas, and the diluted gas path 10 produces ozone mixed gas. The other three diluted gas paths produce carbon dioxide mixed gas, nitric oxide mixed gas, and ammonia mixed gas, respectively.

[0049] In this embodiment, the gas outlet of the dilution gas source 0 is connected to the gas inlets of the baseline gas path 1 and the dilution gas path 2 .

[0050] Each diluted gas path includes a diluted gas source; the dilution gas path 2, the gas outlets of the five diluted gas paths and the gas inlet of the gas mixing chamber 5 are connected.

[0051] The air outlets of the baseline air circuit 1 and the mixing chamber 5 are respectively connected to the first air inlet 61 and the second air inlet 62 of the four-way valve 6, the first air outlet 63 of the four-way valve 6 is connected to the air inlet of the test chamber 7; the second air outlet 64 of the four-way valve is connected to the outside.

[0052] When the four-way valve 6 is opened, the first air inlet 61 is connected to the second air outlet 64, and the second air inlet 62 is connected to the first air outlet 63; when the four-way valve is closed, the first air inlet 61 is connected to the first air outlet 63, and the second air inlet 62 is connected to the second air outlet 64.

[0053] In this embodiment, the dilution gas source is air; each gas circuit is provided with a mass flow controller and a one-way valve. The mass flow controller is used to control the amount of gas entering the gas circuit. The one-way valve is used to prevent gas backflow. The range of the mass flow controller is determined according to the required ratio range of the test gas. In this embodiment, mass flow controllers 01-08 are large-range mass flow controllers, and mass flow controller 09 is a small-range mass flow controller.

[0054] Baseline gas circuit 1 is used to configure the gas environment required for the test according to the preset ambient humidity, so that after each sensor test, the gas environment provided by baseline gas circuit 1 can be used to restore the sensor to its initial state.

[0055] The baseline gas path 1 specifically includes a baseline humidification gas path, a baseline dilution gas path and a first gas mixing chamber 1-1. First, the mass flow controllers in the baseline humidification gas path and the baseline dilution gas path are set according to the ambient humidity. The air is quantitatively divided into two paths according to the limit of the mass flow controller in the gas path and enters the baseline humidification gas path and the baseline dilution gas path respectively. The quantitative air entering the baseline dilution gas path generates quantitative saturated water vapor in the first humidity generating device 1-2. Then the quantitative saturated water vapor and the quantitative air coming out of the baseline dilution gas path are fully mixed in the first gas mixing chamber 1-1 to obtain air with a preset humidity.

[0056] The air with preset humidity enters the test chamber when the four-way valve 6 is closed, so that the sensor to be tested in the test chamber is restored to the initial state.

[0057] At the same time, the feedback sensor 3 will detect the gas parameters entering the detection chamber in real time. At this time, if the gas humidity is not equal to the preset value, the mass flow controller 01 and the mass flow controller 02 are adjusted according to the difference between the measured value and the preset value until the humidity detected by the feedback sensor 3 is equal to the preset value.

[0058] When the four-way valve 6 is opened, the air with preset humidity directly passes through the four-way valve 6 and is discharged to the outside.

[0059] In this embodiment, the dilution gas path 2, the gas outlets of the five diluted gas paths are connected to the gas inlet of the gas mixing chamber 5. Air enters the dilution gas path 2 and enters the gas mixing chamber 5 under the restriction of the mass flow controller 03. At the same time, one or more of the five diluted gas paths are selected according to the gas to be detected at this time.

[0060] If ethanol needs to be tested at this time in this embodiment, the solenoid valve in the ethanol gas circuit 9 is opened, and the ethanol generating device 9-1 in the ethanol gas circuit 9 contains anhydrous ethanol in liquid form at room temperature, which will produce gaseous ethanol of saturated concentration due to volatilization. At the same time, the mass flow controller 05 in the ethanol gas circuit 9 controls the quantitative air to enter the ethanol gas circuit 9, and the mixed gas of the known concentration of mixed ethanol gas produced by the saturated concentration of gaseous ethanol enters the gas mixing chamber.

[0061] At the same time, the air in the dilution gas path 2 also enters the gas mixing chamber. The flow rate of the incoming air is controlled by the mass flow controller 03. The gas mixing chamber mixes a certain amount of air with a certain amount of ethanol mixed gas of known concentration, thereby obtaining an ethanol mixed gas of controllable concentration.

[0062] When the four-way valve 6 is closed, the ethanol mixed gas in the mixing chamber is directly discharged to the outside after passing through the four-way valve 6.

[0063] When the four-way valve 6 is opened, the ethanol mixed gas in the gas mixing chamber passes through the four-way valve 6 and enters the test chamber 7 before being discharged.

[0064] Similarly, the feedback sensor 3 will detect the parameters of the ethanol mixed gas entering the detection chamber in real time. At this time, if the gas parameter is not equal to the preset value, the mass flow controller 03 and the mass flow controller 06 will be adjusted according to the difference between the measured value and the preset value until the feedback sensor 3 detects that the measured value is equal to the preset value.

[0065] If ozone needs to be tested at this time in this embodiment, the solenoid valve in the ozone gas circuit 10 is opened, and the ozone generator 10-1 in the ozone gas circuit 10 is controlled according to the required ozone concentration to generate ozone of a certain concentration, and the flow rate of ozone in the ozone gas circuit 10 can also be controlled according to the mass flow controller 06 in the ozone gas circuit 10. The generated ozone mixed gas with ozone enters the gas mixing chamber.

[0066] At the same time, the air in the dilution gas path 2 also enters the mixing chamber. The flow rate of the incoming air is controlled by the mass flow controller 03. The mixing chamber mixes a certain amount of air with a certain amount of ozone mixed gas of known concentration to obtain ozone of controllable concentration.

[0067] When the four-way valve 6 is closed, the ozone mixed gas in the mixing chamber is directly discharged to the outside after passing through the four-way valve 6 .

[0068] When the four-way valve 6 is opened, the ozone mixed gas in the mixing chamber passes through the four-way valve 6 and enters the test chamber 7 before being discharged.

[0069] Similarly, the feedback sensor 3 will detect the parameters of the ozone mixed gas entering the detection chamber in real time. At this time, if the gas parameter is not equal to the preset value, the mass flow controller 03 and the mass flow controller 06 are adjusted according to the difference between the measured value and the preset value until the feedback sensor 3 detects that the measured value is equal to the preset value.

[0070] In this embodiment, the automatic gas distribution system further includes a humidification gas circuit 8, the gas outlet of the dilution gas source 0 is connected to the gas inlet of the humidification gas circuit 8, and the gas outlet of the humidification gas circuit 8 is connected to the gas inlet of the mixing chamber 5;

[0071] The humidification gas circuit 8 includes a second humidity generating device 8 - 1 , and the second humidity generating device 8 - 1 is used to generate saturated water vapor.

[0072] In this embodiment, the five diluted gas paths include a volatile gas path 9, and the volatile gas path 9 includes a volatile gas generating device 9-1, which is used to gasify the built-in anhydrous ethanol to produce saturated ethanol gas; the outlet of the volatile gas path 9 is connected to the air inlet of the mixing chamber 5.

[0073] In this embodiment, the five diluted gas paths include an ozone gas path 10, and the ozone gas path 10 includes an ozone generator 10-1 and an oxygen-containing source 10-2. The ozone generator 10-1 is used to generate ozone from the oxygen contained in the oxygen-containing source 10-2; the gas outlet of the ozone gas path 10 is connected to the gas inlet of the mixing chamber 5.

[0074] In this embodiment, the ozone generating device 10-1 includes a movable shielding object 10-1-3, a motor 10-1-2, an ultraviolet lamp 10-1-1 and a lamp power supply 10-1-0; the lamp power supply 10-1-0 is used to control the luminous power of the ultraviolet lamp 10-1-1, so that the ultraviolet lamp 10-1-1 generates ultraviolet light of the required intensity, and the ultraviolet light irradiates the oxygen entering the ozone generating device 10-1 to produce ozone; the motor 10-1-2 is used to control the movement of the movable shielding object 10-1-3, thereby changing the irradiation area of ​​the ultraviolet light.

[0075] In this embodiment, the controller 12 is used to compare the actually collected gas parameters with the preset gas parameters, and adjust the mass flow controller of the corresponding gas path according to the parameter difference until the difference is zero;

[0076] The controller 12 is also used to control the opening or closing of each solenoid valve and the four-way valve 6 in a time sequence according to a preset gas switching sequence, thereby switching each diluted gas path to finally connect to the test chamber (7).

[0077] In this embodiment, each gas circuit includes a one-way valve and a solenoid valve for controlling the on-off of the gas circuit.

[0078] The present application also implements a gas distribution method based on the above automatic gas distribution system. Based on this method, automatic switching of multiple gases can be realized. First, the gas switching sequence is determined. In this embodiment, the automatic switching of ethanol mixed gas and ozone mixed gas is used as an example to illustrate the gas distribution method of the present application:

[0079] The specific process is as follows:

[0080] Step 1: Restore the initial state:

[0081] Ensure that the adjustment baseline gas line 1 is open, close all diluted gas lines 4, dilution gas lines 2 and humidification gas lines 8, and close the four-way valve 6; air 0 enters the test chamber 7 from the baseline gas line 1 through the four-way valve 6 and is then discharged;

[0082] In baseline gas path 1, mass flow controllers 01 and 02 are set according to the preset ambient humidity. In baseline gas path 1, the baseline humidification gas path outputs saturated water vapor, and the baseline dilution gas path outputs dry air.

[0083] The saturated water vapor quantitatively measured by the mass flow controller 01 and the dry air quantitatively measured by the mass flow controller 02 are mixed in the first gas mixing chamber 1 - 1 to obtain humid air with a preset ambient humidity.

[0084] The humid air is detected by the sensor 3 before passing through the four-way valve 6 and entering the test chamber 7 to detect whether its humidity is consistent with the preset value. If not, the mass flow controllers 01 and 02 are adjusted by the controller 12 to eventually make the humidity of the humid air reach the preset value.

[0085] After a preset 20 minutes, the sensor to be tested in the test cavity 7 returns to its initial state.

[0086] Step 2: Premixing of the gas to be tested:

[0087] The volatile gas circuit 9 is opened, and the volatile gas circuit 9 includes a volatile gas generating device 9-1, which is used to gasify the built-in room temperature liquid ethanol to produce saturated gaseous ethanol. The gaseous ethanol is quantified by the mass flow controller 05.

[0088] The dilution gas line 2 is opened, and the air passing through is quantified by the mass flow controller 03.

[0089] The humidification air path 8 is opened, and a certain amount of air enters the second humidity generating device 8-1 to generate saturated water vapor.

[0090] A certain amount of dry air, saturated water vapor and gaseous ethanol are mixed in the mixing chamber 5 and then directly discharged through the four-way valve 6;

[0091] After the preset 2 minutes, the premixing of the measured gas is completed.

[0092] Step 3: Sensor testing steps:

[0093] Open the four-way valve 6 and close the baseline gas path 1; the mixed ethanol in the mixing chamber 5 passes through the four-way valve 6 into the test chamber 7 and then is discharged; at this time, the sensor in the test chamber 7 starts to test the concentration of ethanol.

[0094] After 30 minutes, the sensor completed the ethanol concentration test.

[0095] Step 4: Environmental benchmark premixing steps:

[0096] The baseline gas line 1 is opened, and the humid air is discharged from the baseline gas line 1 through the four-way valve 6; after the preset 2 minutes, the humid air premixing is completed.

[0097] At this time, return to step 1 and enter the second cycle to perform sensor testing of the ozone mixed gas.

[0098] Based on the method in the above embodiment, the embodiment of the present application provides a controller, such as Figure 3 As shown, the controller may include: a processor, a communications interface, a memory, and a communication bus, wherein the processor, the communications interface, and the memory communicate with each other via the communication bus. The processor may call the logic instructions in the memory to execute the method in the above embodiment.

[0099] In addition, the logic instructions in the above-mentioned memory can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the part of the technical solution of the present application that essentially contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application.

[0100] Based on the method in the above embodiment, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program. When the computer program runs on a processor, the processor executes the method in the above embodiment.

[0101] Based on the method in the above embodiment, an embodiment of the present application provides a computer program product. When the computer program product runs on a processor, the processor executes the method in the above embodiment.

[0102] It is understood that the processor in the embodiments of the present application may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. The general-purpose processor may be a microprocessor or any conventional processor.

[0103] The method steps in the embodiments of the present application can be implemented by hardware or by a processor executing software instructions. The software instructions can be composed of corresponding software modules, and the software modules can be stored in random access memory (RAM), flash memory, read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), registers, hard disks, mobile hard disks, CD-ROMs, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and the storage medium can be located in an ASIC.

[0104] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a storage medium or transmitted through the storage medium. The computer instructions may be transmitted from a website site, a computer, a server or a data center to another website site, a computer, a server or a data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The storage medium may be any available medium that a computer can access or a data storage device such as a server or a data center that includes one or more available media integrated. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state disk (SSD)), etc.

[0105] It should be understood that the various numerical numbers involved in the embodiments of the present application are only used for the convenience of description and are not used to limit the scope of the embodiments of the present application.

[0106] The above content is easily understood by those skilled in the art. The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An automatic gas distribution system suitable for a variety of gases, characterized in that: The automatic gas distribution system comprises a dilution gas source (0), a baseline gas circuit (1), a dilution gas circuit (2), a plurality of diluted gas circuits (4), a gas mixing chamber (5), a four-way valve (6) and a test chamber (7); wherein each gas circuit is provided with a mass flow controller; the baseline gas circuit (1) is used to configure a gas environment required for the test according to a preset initial environmental humidity; The gas outlet of the dilution gas source (0) is connected to the gas inlets of the baseline gas circuit (1) and the dilution gas circuit (2); Each diluted gas path (4) includes a diluted gas source; the dilution gas path (2), the gas outlet of each diluted gas path (4) and the gas inlet of the gas mixing chamber (5) are connected; The air outlets of the baseline air path (1) and the air mixing chamber (5) are respectively connected to the first air inlet (61) and the second air inlet (62) of the four-way valve (6); the first air outlet (63) of the four-way valve is connected to the air inlet of the test chamber (7); and the second air outlet (64) of the four-way valve is connected to the outside world. When the four-way valve (6) is opened, the first air inlet (61) is connected to the second air outlet (64), and the second air inlet (62) is connected to the first air outlet (63); when the four-way valve is closed, the first air inlet (61) is connected to the first air outlet (63), and the second air inlet (62) is connected to the second air outlet (64).

2. The automatic gas distribution system according to claim 1, characterized in that: The baseline gas path comprises a baseline humidification gas path, a baseline dilution gas path and a first gas mixing chamber (1-1); The air outlet of the dilution gas source (0) is connected to the air inlets of the baseline humidification gas path and the baseline dilution gas path, and the outlets of the baseline humidification gas path and the baseline dilution gas path are connected to the air inlet of the first gas mixing chamber (1-1); the air outlet of the first gas mixing chamber (1-1) is connected to the first air inlet (61) of the four-way valve (6); The baseline humidification gas circuit includes a first humidity generating device (1-2).

3. The automatic gas distribution system according to claim 1, characterized in that: The automatic gas distribution system further comprises a humidifying gas circuit (8), the gas outlet of the dilution gas source (0) is connected to the gas inlet of the humidifying gas circuit (8), and the gas outlet of the humidifying gas circuit (8) is connected to the gas inlet of the gas mixing chamber (5); The humidifying gas circuit (8) includes a second humidity generating device (8-1).

4. The automatic gas distribution system according to claim 1, characterized in that: The multiple diluted gas paths (4) include a volatile gas path (9), and the volatile gas path (9) includes a volatile gas generating device (9-1), and the volatile gas generating device (9-1) is used to gasify the built-in room-temperature liquid gas to generate saturated volatile gas; the gas outlet of the volatile gas path (9) is connected to the gas inlet of the gas mixing chamber (5).

5. The automatic gas distribution system according to claim 1, characterized in that: The multiple diluted gas paths (4) include an ozone gas path (10), the ozone gas path (10) includes an ozone generator (10-1) and an oxygen-containing source (10-2), the ozone generator (10-1) is used to generate ozone from the oxygen contained in the oxygen-containing source (10-2); the gas outlet of the ozone gas path (10) is connected to the gas inlet of the gas mixing chamber (5).

6. The automatic gas distribution system according to claim 5, characterized in that: The ozone generating device (10-1) comprises a movable shield (10-1-3), a motor (10-1-2), an ultraviolet lamp (10-1-1) and a lamp power supply (10-1-0); The lamp power supply (10-1-0) is used to control the luminous power of the ultraviolet lamp (10-1-1), so that the ultraviolet lamp (10-1-1) generates ultraviolet light of required intensity, and the ultraviolet light irradiates the oxygen entering the ozone generating device (10-1) to generate ozone; The motor (10-1-2) is used to control the movement of the movable shielding object (10-1-3), thereby changing the irradiation area of ​​the ultraviolet light.

7. The automatic gas distribution system according to claim 1, characterized in that: The automatic gas distribution system also includes a feedback sensor (3) and a controller (12); The feedback sensor (3) is located in front of the test chamber (7) and is used to detect the parameters of the gas entering the test chamber (7); and transmit the parameters of the gas to the controller (12); The controller (12) is used to compare the actually collected gas parameters with the preset gas parameters, and adjust the mass flow controller of the corresponding gas path according to the difference in the parameters until the difference is zero; The controller (12) is also used to control the on / off of each gas path and the switch of the four-way valve (6) in a time sequence according to a preset gas switching sequence, thereby switching each diluted gas path to finally connect to the test chamber (7).

8. The automatic gas distribution system according to claim 1, characterized in that: Each gas circuit contains a one-way valve and a solenoid valve for controlling the on-off of the gas circuit.

9. A gas distribution method based on the automatic gas distribution system according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Ensure that the adjustment baseline gas circuit (1) is open, close all diluted gas circuits (4) and dilution gas circuits (2), and close the four-way valve (6); the dilution gas enters the test chamber (7) from the baseline gas circuit (1) through the four-way valve (6) and is then discharged; S2, after the first preset time interval, the required diluted gas path is opened according to the preset gas switching sequence, the dilution gas path (2) is opened, the mass flow controllers in the dilution gas path (2) and the diluted gas path are adjusted according to the preset gas concentration, and the diluted gas and the dilution gas are mixed in the gas mixing chamber (5) and directly discharged through the four-way valve (6); S3, after the second preset time interval, the four-way valve (6) is opened and the baseline gas path (1) is closed; the mixed gas in the gas mixing chamber (5) passes through the four-way valve (6) into the test chamber (7) and is then discharged; S4, after the third preset time interval, determine whether the automatic gas distribution is completed, if so, it is completed; otherwise, open the baseline gas path (1), and the diluted gas is discharged from the baseline gas path (1) through the four-way valve (6); S5. After the fourth preset time interval, return to step S1.

10. A controller, characterized in that: include: Memory for storing computer programs; A processor is used to execute the program stored in the memory. When the program stored in the memory is executed, the processor is used to execute the method as claimed in claim 9.

Images