Dynamic gas distribution device and method for high-concentration macromolecular organic gas

Abstract

The invention discloses a dynamic gas distribution device and method for high-concentration macromolecular organic gas, and solves the problems of low gas distribution efficiency, narrow concentration adjusting range and non-uniform mixing in the prior art. Comprising a diluted gas input interface, a standard sample input interface, a double-flow control system and a vaporization module, the standard sample input interface is connected with a liquid standard sample of pre-prepared gas or standard gas to be diluted and is switched through a switching valve, the double-flow control system comprises a first flow controller and a second flow controller, the first flow controller is connected with the diluted gas input interface, and the second flow controller is connected with the standard sample input interface; the vaporization module comprises a sample injection heater and a heating mixer, the double-flow control system is connected with an inlet of the sample injection heater, an outlet of the sample injection heater is connected with an inlet of the heating mixer, and an outlet of the heating mixer is connected with an inlet of an external air bag; and an outlet of the air bag is connected with an inlet of the second flow controller. The two modes of liquid gas distribution and dynamic gas distribution are supported, and gas sources can be flexibly switched.

Description

Technical Field

[0001] The present invention relates to the technical field of gas distribution, and in particular to a dynamic gas distribution device and method for high-concentration macromolecular organic gas. Background Art

[0002] High-concentration macromolecular organic gas dynamic distribution devices play an important role in the medical and testing fields. Their function is to accurately mix liquid high-concentration macromolecular organic gas or high-concentration gas into standard gas of the required concentration for anesthesia equipment calibration or clinical use. In the existing technology, high-concentration macromolecular organic gas dynamic distribution mainly adopts static distribution method and dynamic distribution method, but still has the following technical bottlenecks:

[0003] 1. Low gas distribution efficiency: Traditional gas distribution methods rely on manual operation, resulting in long distribution cycles and difficulty meeting the needs of rapid calibration. For example, static gas distribution requires multiple dilution and mixing steps, which is time-consuming. While dynamic gas distribution can continuously output gas, the flow control accuracy of existing devices is insufficient, resulting in low gas distribution efficiency.

[0004] 2. Low storage pressure in gas cylinders: In traditional static volumetric gas distribution, the gas pressure in the gas cylinder is related to the saturated vapor pressure of the target gas component at the storage temperature. Macromolecular organic gases are characterized by a large number of molecules and a low saturated vapor pressure, resulting in too low pressure in the gas cylinder when dispensing higher concentration gases.

[0005] 3. Narrow concentration adjustment range: Existing devices mostly use a single flow control system, which limits the mixing ratio of the dilution gas and the standard sample and cannot flexibly adapt to a wide range of concentration requirements. For example, when diluting a high-concentration gas, concentration jumps are likely to occur, making it difficult to accurately prepare a low-concentration gas.

[0006] To address these issues, existing technologies have introduced the air bag method, which shortens the air distribution cycle by dispensing on demand. However, this method still has limitations: the air bag capacity is fixed, limiting the amount of gas it can hold; the air distribution process lacks an intelligent control module, relying on manual parameter adjustment, which is cumbersome and prone to errors; and imprecise vaporization temperature control can lead to incomplete vaporization of the liquid sample, affecting air distribution stability.

[0007] Therefore, there is an urgent need for an efficient, flexible and accurate dynamic gas distribution device and method for high-concentration macromolecular organic gas to solve the problems of low gas distribution efficiency, limited concentration adjustment range, uneven mixing, etc. in the existing technology, thereby improving the reliability and convenience of the calibration of high-concentration macromolecular organic gas detectors. Summary of the Invention

[0008] The purpose of the present invention is to provide a high-concentration macromolecular organic gas dynamic gas distribution device and method to solve the technical problems of low gas distribution efficiency, narrow concentration adjustment range and uneven mixing in the prior art.

[0009] To achieve the above objectives, the present invention provides the following technical solutions:

[0010] The present invention provides a high-concentration macromolecular organic gas dynamic distribution device, which includes a dilution gas input interface, a standard sample input interface, a dual-flow control system, a vaporization module, and a touch screen control module; the standard sample input interface is connected to a liquid standard sample of a pre-distributed gas or a standard gas to be diluted, and is switched by a switching valve; the dual-flow control system includes a first flow controller and a second flow controller, the first flow controller is connected to the dilution gas input interface for controlling the flow of the input dilution gas, and the second flow controller is connected to the standard sample input interface for controlling the flow of the standard sample; the vaporization module includes a sample injection heater and a heating mixer, the dual-flow control system is connected to the sample injection heater inlet, the sample injection heater outlet is connected to the heating mixer inlet, and the heating mixer outlet is connected to the inlet of an external air bag; the outlet of the air bag is connected to the inlet of the second flow controller, and a vacuum pump, a pressure stabilizing valve and a pressure gauge are provided between the air bag and the second flow controller; the touch screen control module is signal-connected to other modules.

[0011] Furthermore, the outlet of the second flow controller is also connected to a discharge flow meter and an output flow meter. The outlet of the discharge flow meter is connected to the discharge port for discharging excess gas during gas distribution. A discharge valve is provided between the second flow controller and the discharge flow meter; the outlet of the output flow meter is connected to the output port for outputting the prepared gas for continuous use. The second flow controller and the output flow meter are provided with an output valve.

[0012] Furthermore, the flow rate range of the first flow controller is 40 to 2000 ml / min, and the flow rate range of the second flow controller is 10 to 500 ml / min.

[0013] The present invention provides a dynamic gas distribution method for high-concentration macromolecular organic gas, including two modes: liquid gas distribution and dynamic gas distribution;

[0014] When the system is in liquid gas distribution, the following steps are included:

[0015] A1: Turn on the power and preheat to zero. Each time you start the machine, adjust the zero for the first time, preheat for 10 minutes, and then pass the purge gas to purge the gas line for 10 seconds.

[0016] A2: Connect the dilution gas input interface to the compressed air cylinder, and adjust the output pressure of the pressure reducing valve on the compressed air cylinder to ensure that the input pressure to the device is 0.1MPa;

[0017] A3: Adjust the gas distribution volume limit, adjust the volume of gas required and the flow rate required for gas distribution;

[0018] A4: Use a precision syringe to draw in the required volume or weight of liquid sample for later use. After the gas distribution device starts distributing gas, the compressed air passes through the first flow controller and the sample injection heater according to the set gas distribution flow rate and enters the heating mixer. Then, the liquid sample is slowly injected into the sample injection heater for vaporization. After the liquid sample is vaporized in the sample injection heater, it is mixed with the compressed air in the heating mixer and enters the air bag.

[0019] A5: After the gas distribution process is completed, remove the air bag and wait for 15 minutes for the gas to be further mixed before use;

[0020] When the system is in dynamic gas distribution, the standard sample input interface is connected to the cylinder gas or air bag, and the gas source is switched through the switching valve;

[0021] When the standard sample input interface is connected to the cylinder gas, the cylinder gas is mixed with the compressed air flowing through the first flow controller through the second flow controller to produce a gas with a concentration lower than that of the cylinder gas;

[0022] When the standard sample input interface is connected to the air bag, the prepared gas in the air bag is injected into the second flow controller through the vacuum pump and mixed with the compressed air flowing through the first flow controller to prepare a gas with a concentration lower than that of the air bag.

[0023] Furthermore, the vaporization temperature is preset to be 20° C. higher than the boiling point of the liquid sample, and the vaporizer temperature is monitored in real time during the gas distribution process. If the measured temperature is more than 3° C. lower than the preset value, starting the gas distribution is prohibited.

[0024] Based on the above technical solution, the embodiments of the present invention can produce at least the following technical effects:

[0025] This invention utilizes a dual-flow control system to precisely control the flow rates of dilution gas and standard samples. Combined with a vaporization module, it achieves dynamic, efficient vaporization and uniform mixing of high-concentration, macromolecular organic gases in liquid form. A touchscreen control module enables intelligent operation throughout the entire process. The device supports both liquid and dynamic gas distribution modes, allowing for flexible switching of gas sources. This addresses existing issues such as low gas distribution efficiency, narrow concentration adjustment range, and uneven mixing. Furthermore, preset temperature control and real-time monitoring ensure a stable and reliable vaporization process, significantly improving gas distribution accuracy and ease of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0027] Figure 1 It is a structural diagram of an embodiment of the present invention;

[0028] In the figure: 1. Dilution gas input interface; 2. Standard sample input interface; 3. First flow controller; 4. Second flow controller; 5. Sample injection heater; 6. Heating mixer; 7. Air bag; 8. Touch screen control module; 9. Vacuum pump; 10. Pressure regulating valve; 11. Pressure gauge; 12. Two-position three-way solenoid valve; 13. Switching valve; 14. Discharge flow meter; 15. Discharge port; 16. Output flow meter; 17. Output port. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0030] Taking the dynamics of high-concentration macromolecular organic gas as an example, the purpose of the present invention is achieved through the following technical solutions:

[0031] The dynamic gas distribution device for liquid high-concentration macromolecular organic gases can either dynamically distribute liquid high-concentration macromolecular organic gases into gas in a static distribution mode and fill it into an air bag for direct use as a standard gas, or distribute it into high-concentration gas as a gas source (with the air bag left on the device), activate dynamic distribution, and dilute it to different concentrations. It can also continuously dilute high-concentration bottled high-concentration gas standard materials to different concentrations.

[0032] like Figure 1As shown, a high-concentration macromolecular organic gas dynamic distribution device includes a dilution gas input interface 1, a standard sample input interface 2, a dual flow control system, a vaporization module, and a touch screen control module 8; the standard sample input interface 1 is connected to a pre-distributed liquid standard sample or a standard gas to be diluted, and is switched by a switching valve 13, the dual flow control system includes a first flow controller 3 and a second flow controller 4, the flow range of the first flow controller is 40 to 2000 ml / min, the flow range of the second flow controller is 10 to 500 ml / min, the first flow controller 3 and the dilution gas input interface 1 The second flow controller 4 is connected to the standard sample input interface 2 to control the flow of the standard sample; the vaporization module includes a sample injection heater 5 and a heating mixer 6, the dual flow control system is connected to the inlet of the sample injection heater 5, the outlet of the sample injection heater 5 is connected to the inlet of the heating mixer 6, and the outlet of the heating mixer 6 is connected to the inlet of the external air bag 7; the outlet of the air bag 7 is connected to the inlet of the second flow controller 4, and a vacuum pump 9, a pressure regulating valve 10 and a pressure gauge 11 are provided between the air bag 7 and the second flow controller 4; the touch screen control module 8 is connected to the signals of other modules.

[0033] In this embodiment, the outlet of the second flow controller 4 is also connected to a discharge flowmeter 14 and an output flowmeter 16. The outlet of the discharge flowmeter 14 communicates with a discharge port 15 for venting excess gas during gas distribution, with a discharge valve disposed between the second flow controller 4 and the discharge flowmeter 14. The outlet of the output flowmeter 16 communicates with an output port 17 for discharging the prepared gas for continuous use, with output valves disposed between the second flow controller 4 and the output flowmeter 16. A two-position, three-way solenoid valve 12 is disposed between the first and second flow controllers 3, 4, and the sample heater 5, and a two-position, three-way solenoid valve 12 is disposed between the heating mixer 6 and the air bag.

[0034] Gas distribution device installation environment:

[0035] Indoor setup: Vibration-free and shock-free test bench:

[0036] Place the gas distribution device horizontally on the test bench;

[0037] No corrosive gas, little dust, good ventilation;

[0038] There will be no drastic temperature changes, no direct sunlight, and no fireworks;

[0039] Working environment: ambient temperature (5-45)°C, ambient humidity (0-90)% RH, atmospheric pressure (86-106) kPa;

[0040] Do not get close to machines that generate strong magnetic fields, electric fields, or high frequencies;

[0041] Working voltage and frequency: The working voltage is unidirectional (220±20)V and the frequency is 50Hz. A stable power supply and safe grounding are required.

[0042] Functions of the gas distribution device:

[0043] 1. Liquid Gas Distribution: Any liquid substance at room temperature and pressure can be accurately prepared into a standard gas. High-concentration, macromolecular organic gas dynamic solutions typically have a concentration above 99%. The calculated volume of liquid organic solvent required for injection already accounts for this concentration. Single-point preparation is possible, with gas bags filled for use. Alternatively, a high concentration can be prepared first, then continuously diluted to varying concentrations, and then discharged from the rear panel outlet for continuous use or filled into gas bags.

[0044] 2. Dilute bottled gas: Any high-concentration bottled gas standard substance can be continuously diluted to the desired concentration, output from the output port on the rear panel for continuous use, or fill into air bags for use.

[0045] 3. Detection and calibration: Detect and calibrate the flow rate of the device. The calibration function is used before leaving the factory and during regular inspection of the device.

[0046] 4. Preset Temperature: The vaporizer heating temperature depends on the selected sample. You can preset the vaporizer heating temperature based on the boiling point of the gas sample you are preparing. In the Heater Preset Temperature box, enter a temperature 20 degrees higher than the vaporization temperature of the gas you are preparing. For example, if preparing gas containing ethanol, the vaporizer temperature can be preset to 105°C. The vaporizer temperature box on the liquid gas preparation page displays both the preset temperature and the measured temperature.

[0047] 5. Preheating and zeroing: The device will automatically preheat and zero after power-on. The preheating and zeroing time is 10 minutes.

[0048] A dynamic gas distribution method for high-concentration macromolecular organic gas, including two modes: liquid gas distribution and dynamic gas distribution;

[0049] First, according to the required gas distribution volume, a suitable gas bag (10L, 20L, 50L, etc.) is selected and inserted into the gas distribution device to provide the gas distribution concentration of the high-concentration macromolecular organic gas (such as 8%). The gas distribution device calculates the volume (mL) or weight (mg) of the required sample high-concentration macromolecular organic gas dynamic liquid (such as enflurane) based on the concentration of the high-concentration macromolecular organic gas dynamic sample (usually 100%), the gas distribution volume and the gas distribution concentration.

[0050] When the system is in liquid gas distribution, the following steps are included:

[0051] A1: Turn on the power and preheat to zero. Each time you start the machine, adjust the zero for the first time, preheat for 10 minutes, and then pass the purge gas to purge the gas line for 10 seconds.

[0052] A2: Connect the dilution gas input interface to the compressed air cylinder, and adjust the output pressure of the pressure reducing valve on the compressed air cylinder to ensure that the input pressure to the device is 0.1MPa;

[0053] A3: Adjust the gas distribution volume limit, adjust the volume of gas required and the flow rate required for gas distribution;

[0054] A4: Use a precision syringe to draw in the required volume or weight of liquid sample for later use. After the gas distribution device starts distributing gas, the compressed air passes through the first flow controller and the sample injection heater according to the set gas distribution flow rate and enters the heating mixer. Then, the liquid sample is slowly injected into the sample injection heater for vaporization. After the liquid sample is vaporized in the sample injection heater, it is mixed with the compressed air in the heating mixer and enters the air bag.

[0055] A5: After the gas distribution process is completed, remove the air bag and wait for 15 minutes for the gas to be further mixed before use;

[0056] When the system is in dynamic gas distribution, the standard sample input interface is connected to the cylinder gas or air bag, and the gas source is switched through the switching valve;

[0057] When the standard sample input interface is connected to the cylinder gas, the cylinder gas is mixed with the compressed air flowing through the first flow controller through the second flow controller to produce a gas with a concentration lower than that of the cylinder gas;

[0058] When the standard sample input interface is connected to the air bag, the prepared gas in the air bag is injected into the second flow controller through the vacuum pump and mixed with the compressed air flowing through the first flow controller to prepare a gas with a concentration lower than that of the air bag.

[0059] When the liquid high-concentration macromolecular organic gas is an anesthetic gas, in this embodiment, the preset temperature during dynamic gas distribution is the set temperature of the sample heater and heating mixer, generally set to the dynamic boiling point of the high-concentration macromolecular organic gas + 30°C. Gas distribution is initiated when the actual heater temperature is greater than or equal to the preset temperature -3°C. The current air temperature and pressure are input before gas distribution, and the gas distribution device adjusts the volumetric flow rate of the gas distribution output accordingly. The distribution volume must be smaller than the air bag volume, for example, 18L for a 20L air bag. The name and concentration of the high-concentration macromolecular organic gas dynamic gas are input as the sample gas concentration, and the desired anesthetic gas concentration is input as the distribution concentration. After the distribution concentration is input, the distribution device calculates the sample volume and weight. A precision syringe is used to draw the corresponding volume or weight of the high-concentration macromolecular organic gas dynamic liquid. After gas distribution is initiated, it is injected into the sample heater before the gas distribution timer expires. After the gas distribution timer expires, the air bag is distributed, and the anesthetic gas in the bag can be used to calibrate the anesthetic gas detector.

[0060] In this embodiment, when the air bag is dispensed with anesthetic gas, the sample gas concentration is input into the anesthetic gas concentration obtained by the air bag dispense, the flow input is set to be greater than the flow required by the anesthetic gas detector, and the gas dispense concentration is input into the concentration required to calibrate the anesthetic gas detector; the gas dispense concentration can be selected between 0.2% and 8%. After starting the gas dispense, the gas dispenser can dynamically output anesthetic gas at a flow rate of 600 mL / min, which is directly introduced into the anesthetic gas detector for calibration.

[0061] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-concentration macromolecular organic gas dynamic gas distribution device, characterized in that: It includes a dilution gas input interface, a standard sample input interface, a dual flow control system, a vaporization module, and a touch screen control module; the standard sample input interface is connected to a liquid standard sample of a pre-mixed gas or a standard gas to be diluted, and is switched by a switching valve, the dual flow control system includes a first flow controller and a second flow controller, the first flow controller is connected to the dilution gas input interface, for controlling the flow of the input dilution gas, the second flow controller is connected to the standard sample input interface, for controlling the flow of the standard sample; the vaporization module includes a sample heater and a heating mixer, the dual flow control system is connected to the sample heater inlet, the sample heater outlet is connected to the heating mixer inlet, and the heating mixer outlet is connected to the inlet of an external air bag; the outlet of the air bag is connected to the inlet of the second flow controller, and a vacuum pump, a pressure stabilizing valve and a pressure gauge are provided between the air bag and the second flow controller; the touch screen control module is connected to the signals of other modules.

2. The high-concentration macromolecular organic gas dynamic gas distribution device according to claim 1, characterized in that: The outlet of the second flow controller is also connected to a discharge flow meter and an output flow meter. The outlet of the discharge flow meter is connected to the discharge port, which is used to discharge excess gas during gas distribution. A discharge valve is provided between the second flow controller and the discharge flow meter; the outlet of the output flow meter is connected to the output port, which is used to output the prepared gas for continuous use. The second flow controller and the output flow meter are provided with an output valve.

3. The high-concentration macromolecular organic gas dynamic gas distribution device according to claim 1, characterized in that: The flow rate range of the first flow controller is 40 to 2000 ml / min, and the flow rate range of the second flow controller is 10 to 500 ml / min.

4. A method for dynamic gas distribution of high-concentration macromolecular organic gas, characterized in that: Including liquid gas distribution and dynamic gas distribution mode; When the system is in liquid gas distribution, the following steps are included: A1: Turn on the power and preheat to zero. Each time you start the machine, adjust the zero for the first time, preheat for 10 minutes, and then pass the purge gas to purge the gas line for 10 seconds. A2: Connect the dilution gas input interface to the compressed air cylinder, and adjust the output pressure of the pressure reducing valve on the compressed air cylinder to ensure that the input pressure to the device is 0.1MPa; A3: Adjust the gas distribution volume limit, adjust the volume of gas required and the flow rate required for gas distribution; A4: Use a precision syringe to draw in the required volume or weight of liquid sample for later use. After the gas distribution device starts distributing gas, the compressed air passes through the first flow controller and the sample injection heater according to the set gas distribution flow rate and enters the heating mixer. Then, the liquid sample is slowly injected into the sample injection heater for vaporization. After the liquid sample is vaporized in the sample injection heater, it is mixed with the compressed air in the heating mixer and enters the air bag. A5: After the gas distribution process is completed, remove the air bag and wait for 15 minutes for the gas to be further mixed before use; When the system is in dynamic gas distribution, the standard sample input interface is connected to the cylinder gas or air bag, and the gas source is switched through the switching valve; When the standard sample input interface is connected to the cylinder gas, the cylinder gas is mixed with the compressed air flowing through the first flow controller through the second flow controller to produce a gas with a concentration lower than that of the cylinder gas; When the standard sample input interface is connected to the air bag, the prepared gas in the air bag is injected into the second flow controller through the vacuum pump and mixed with the compressed air flowing through the first flow controller to prepare a gas with a concentration lower than that of the air bag.

5. The high-concentration macromolecular organic gas dynamic distribution method according to claim 4, characterized in that: The vaporization temperature is preset to be 20°C higher than the boiling point of the liquid sample, and the vaporizer temperature is monitored in real time during the gas distribution process. If the measured temperature is more than 3°C lower than the preset value, starting the gas distribution is prohibited.

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