Standard alcohol gas generating device and method

Abstract

The invention discloses a standard alcohol gas generating device and method, and belongs to the technical field of gas generating devices. The standard alcohol gas generating device comprises a gas carrying pipeline, a humidifying module, an alcohol gas pipeline, a first gas mixing pipe and a standard gas pipeline; by arranging the humidifying module with the first three-way valve and the moisture recovery part, the humidifier can still keep the running state when standard alcohol gas does not need to be output, and generated moisture is recycled or recovered through the moisture recovery part; and when output is needed, moisture with stable humidity can be immediately obtained only by switching an airflow path. Therefore, the intermittent output of the alcohol first-grade standard gas is realized to save the cost, and the humidity stability of the output standard alcohol gas is ensured, so that the verification accuracy of the alcohol detector is improved.

Description

Technical Field

[0001] This application relates to the field of gas generating apparatus technology, and in particular to a standard alcohol gas generating apparatus and method. Background Technology

[0002] Breathalyzers are widely used in road traffic management, public safety, and medical testing to measure the alcohol content in exhaled breath. To ensure the accuracy of breathalyzer measurements, they need to be calibrated regularly. During calibration, a standard alcohol gas generator is used to produce standard alcohol gas of specific humidity and concentration for a breath test. When testing for indication error, multiple breath tests are performed using standard alcohol gas of different concentrations. Each breath is relatively short (e.g., about 5 seconds), while the interval between adjacent breaths is longer (up to several minutes or even tens of minutes).

[0003] In existing technologies, a common ethanol standard gas generator uses liquid alcohol as the alcohol source (e.g., by generating alcohol gas through a permeation furnace) and works in conjunction with a humidifier to humidify the carrier gas. To ensure stable humidity of the gas output from the humidifier, these devices typically require a continuous output of ethanol standard gas, keeping the humidifier in a continuous operating state to avoid instability in the output gas humidity each time the humidifier starts due to a lack of dynamic equilibrium. However, the concentration of alcohol gas generated using liquid alcohol is not accurate enough, affecting the reliability of the calibration results.

[0004] To improve the accuracy of alcohol gas concentration, standard alcohol gas in cylinders can be used as the gas source. However, standard alcohol gas is expensive. If the existing continuous output method is used, continuously outputting standard alcohol gas during the long intervals between consecutive breaths would result in significant waste and very high operating costs. Therefore, the generator using standard alcohol gas as its source should employ an intermittent output method, that is, outputting standard alcohol gas only when breaths are needed, and ceasing output during the intervals.

[0005] However, if intermittent output is used, the humidifier also needs to be turned on and off accordingly. During each startup phase, the humidity of the output gas is unstable until the water vapor concentration reaches dynamic equilibrium. If this type of humidifier is used in a standard alcohol gas generator with intermittent output, the unstable humidity at startup will lead to inaccurate humidity readings of the standard alcohol gas output from the generator. Inaccurate standard alcohol gas humidity directly affects the accuracy of its concentration (because alcohol concentration calculation is related to gas humidity), ultimately impacting the accuracy of the alcohol detector's readings.

[0006] Therefore, it is evident that existing technologies cannot simultaneously meet the requirements of using alcohol as a primary standard gas source, saving gas costs (intermittent output), and ensuring stable output gas humidity (continuous operation of the humidifier). Summary of the Invention

[0007] To address the aforementioned technical problems, this application provides a standard alcohol gas generator and method that can both achieve intermittent output of primary standard alcohol gas to save costs and ensure the humidity stability of the output standard alcohol gas.

[0008] To achieve the above objectives, this application provides the following solution.

[0009] On the one hand, this application provides a standard alcohol gas generator, including a carrier gas pipeline, a humidification module, an alcohol gas pipeline, a first mixing pipeline, and a standard gas pipeline; The input end of the carrier gas pipeline is equipped with a carrier gas storage tank, and the output end of the carrier gas pipeline is connected to the air inlet end of the humidification module; a first flow controller is provided between the input end and the output end of the carrier gas pipeline. The humidification module includes an air inlet, a humidifier, a first three-way valve, a moisture recovery component, and an air outlet. The humidifier includes an air inlet, a water storage container, a humidifying element, and an air outlet. The air inlet of the humidifier is connected to the air inlet of the humidification module. The humidifying element is disposed within the water storage container. The air outlet of the humidifier is used to output moisture. The air outlet of the humidifier is connected to the input of the first three-way valve. The first three-way valve also includes a first output and a second output. The first output of the first three-way valve is connected to the moisture recovery component, and the second output of the first three-way valve is connected to the air outlet of the humidification module. The moisture recovery component is used to return some or all components of the moisture to the humidifier for recycling. The air outlet of the humidification module is connected to the input of the first mixing pipe. The alcohol gas pipeline has an alcohol gas storage tank at its inlet; the alcohol gas pipeline is connected to the inlet of the first mixing pipe; and a second flow controller is provided between the inlet and outlet of the alcohol gas pipeline. The output end of the first mixing tube is connected to the input end of the standard gas line; the output end of the standard gas line is connected to the alcohol detector being tested.

[0010] Optionally, the standard alcohol gas generator further includes a second three-way valve; the second three-way valve includes an input end, a first output end, and a second output end; the input end of the second three-way valve is connected to the output end of the carrier gas pipeline; the first output end of the second three-way valve is connected to the air inlet end of the humidification module; and the second output end of the second three-way valve is connected to the input end of the first mixing pipe.

[0011] Optionally, the standard gas pipeline is further provided with a heating module; the heating module includes a heater and a temperature sensor; the temperature sensor is used to detect the gas temperature in the standard gas pipeline; the heater is used to heat the gas in the standard gas pipeline according to the detection value of the temperature sensor, so that the standard gas pipeline outputs standard alcohol gas at a preset temperature.

[0012] Optionally, the standard alcohol gas generator further includes a carbon dioxide pipeline; the input end of the carbon dioxide pipeline is equipped with a carbon dioxide storage tank; the output end of the carbon dioxide pipeline is connected to the input end of the first mixing pipe; and a third flow controller is provided between the input end and the output end of the carbon dioxide pipeline.

[0013] Optionally, the standard alcohol gas generator further includes a second mixing pipe; the output end of the alcohol gas pipe and the output end of the carbon dioxide pipe are respectively connected to the input end of the second mixing pipe; the output end of the second mixing pipe is connected to the input end of the first mixing pipe.

[0014] Optionally, the humidifying element is a permeation tube or a bubbler, used to humidify the carrier gas input into the air inlet of the humidifier by using the water stored in the water storage container to obtain moisture.

[0015] Optionally, the moisture recovery component is a water-air separator; the water-air separator includes an air inlet, an air outlet, and a water outlet; the air inlet of the water-air separator is connected to the first output terminal of the three-way valve; the water outlet of the water-air separator is connected to the water storage container of the humidifier; and the air outlet of the water-air separator is connected to the atmosphere.

[0016] Optionally, the moisture recovery component includes a water-air separator and an air pump; the water-air separator includes an air inlet, an air outlet, and a water outlet; the water outlet of the water-air separator is connected to the water storage container of the humidifier; the air pump is installed on the pipeline between the air outlet of the water-air separator and the air inlet of the humidifier, the air inlet of the water-air separator is connected to the first output terminal of the three-way valve, the input terminal of the air pump is connected to the air outlet of the water-air separator, and the output terminal of the air pump is connected to the air inlet of the humidifier; or, the air pump is installed on the pipeline between the first output terminal of the three-way valve and the air inlet of the water-air separator, the input terminal of the air pump is connected to the first output terminal of the three-way valve, the output terminal of the air pump is connected to the air inlet of the water-air separator, and the air outlet of the water-air separator is connected to the air inlet of the humidifier.

[0017] Optionally, the moisture recovery component is an air pump; the input end of the air pump is connected to the first output end of the first three-way valve; the output end of the air pump is connected to the air inlet of the humidifier.

[0018] On the other hand, this application provides a standard alcohol gas generation method, applied to the aforementioned standard alcohol gas generating apparatus, comprising the following steps: Carrier gas is supplied through a carrier gas storage tank, and alcohol standard gas is supplied through an alcohol gas storage tank. Determine whether it is necessary to output standard alcohol gas to the alcohol detector being tested; If standard alcohol gas needs to be output, the first flow controller is activated, allowing the carrier gas to enter the humidifier through the inlet of the humidification module for humidification to obtain humidified gas; the first three-way valve is activated to connect the outlet of the humidifier with the outlet of the humidification module, delivering the humidified gas to the first mixing pipe; the second flow controller is activated, delivering the primary standard alcohol gas to the first mixing pipe; the humidified gas and the primary standard alcohol gas are mixed in the first mixing pipe to obtain standard alcohol gas, which is then output through the standard gas pipeline; If the standard alcohol gas is not required, the second flow controller is closed to stop the delivery of the first-level standard alcohol gas; the first three-way valve is controlled to connect the outlet of the humidifier with the moisture recovery component, and the moisture is delivered to the moisture recovery component; the moisture recovery component delivers some or all of the components in the moisture back to the humidifier for recycling and keeps the humidifier in operation.

[0019] According to the specific embodiments provided in this application, the following technical effects are disclosed: This application provides a standard alcohol gas generating device and method. By incorporating a humidification module with a moisture recovery component, the humidifier can continue operating even when standard alcohol gas is not needed. The generated moisture is recycled or recovered through the moisture recovery component. When output is required, simply switching the airflow path immediately yields stable humidity. This achieves both intermittent output of primary standard alcohol gas to save costs and ensures the humidity stability of the output standard alcohol gas, thereby improving the accuracy of alcohol detector calibration. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the overall structure of a standard alcohol gas generator that uses the humidification module of Embodiment 1 of this application; Figure 2A schematic diagram of the overall structure of a standard alcohol gas generator that uses the humidification module of Embodiment 2 of this application; Figure 3 This is a schematic diagram of the overall structure of a standard alcohol gas generator that uses the humidification module of Embodiment 3 of this application. Figure 4 This is a vertical cross-sectional view of one embodiment of the humidifier of the humidification module of this application; Figure 5 This is a vertical cross-sectional view of another embodiment of the humidifier of the humidification module of this application; Figure 6 This is a cross-sectional view of the water-air separator of the humidification module of this application along the horizontal direction. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] In this application, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," "link," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, a mechanical connection, a direct connection, or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] In this document, references to "embodiment" or "implementation" mean that a particular feature, structure, or characteristic described in connection with an embodiment or implementation may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0025] In existing technologies, when using primary standard alcohol gas as a gas source, intermittent output to save costs leads to frequent starting and stopping of the humidifier, resulting in unstable humidity in the initial output of the humidifier. This, in turn, affects the accuracy of the standard alcohol gas concentration and the accuracy of the alcohol detector. Conversely, continuous output to maintain stable humidity results in a significant waste of expensive primary standard alcohol gas. To address these technical problems, this application provides a standard alcohol gas generating device and method that can achieve both intermittent output of primary standard alcohol gas to save costs and ensure the humidity stability of the output standard alcohol gas, thereby improving the accuracy of the alcohol detector.

[0026] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] This application provides a standard alcohol gas generator, such as Figures 1 to 3 As shown, it includes a carrier gas pipeline 10, a humidification module 20, an alcohol gas pipeline 30, a first mixing pipeline 51, and a standard gas pipeline 60.

[0028] The carrier gas pipeline 10 has a carrier gas storage tank 11 at its input end, and the carrier gas can be compressed air or nitrogen. The output end of the carrier gas pipeline 10 is connected to the air inlet 21 of the humidification module 20. A first flow controller 12 for controlling the carrier gas flow rate is also provided between the input and output ends of the carrier gas pipeline 10.

[0029] The humidification module 20 includes an air inlet 21, a humidifier 22, a first three-way valve 23, a moisture recovery component, and an air outlet 25. The humidifier 22 includes an air inlet 221, a water storage container 222, a humidifying element 223, and an air outlet 224. The air inlet 221 of the humidifier 22 is connected to the air inlet 21 of the humidification module 20. The humidifying element 223 is disposed within the water storage container 222. The air outlet 224 of the humidifier 22 is used to output humidified carrier gas (referred to as moisture). The air outlet 224 of the humidifier 22 is connected to the input end 231 of the first three-way valve 23. The first three-way valve 23 also includes a first output end 232 and a second output end 233; the first output end 231 of the first three-way valve 23 is connected to the moisture recovery component, and the second output end 233 of the first three-way valve 23 is connected to the air outlet 25 of the humidification module 20. The moisture recovery component is used to transport some or all of the components in the moisture back to the humidifier 22 for recycling. The outlet 25 of the humidification module 20 is connected to the input end of the first mixing pipe 31.

[0030] An alcohol gas pipeline 30 has an alcohol gas storage tank 31 at its inlet, and its outlet is connected to the inlet of the first mixing pipe 51. A second flow controller 32 is provided between the inlet and outlet of the alcohol gas pipeline 30. The alcohol gas storage tank 31 can be a steel cylinder used to store primary standard alcohol gas.

[0031] The output end of the first mixing pipe 51 is connected to the input end of the standard gas line 60, and the output end of the standard gas line 60 is used to connect to the alcohol detector being tested.

[0032] When a breathalyzer test is required (e.g., a 5-second breathalyzer test), the first three-way valve 23 switches to a state where input 231 is disconnected from the first output 232 and input 231 is connected to the second output 233. At this time, the humidification module 20 is in output mode. The first flow controller 12 delivers the carrier gas from the carrier gas tank 11 to the humidifier 22 according to the set flow rate. The humidified carrier gas (moist gas) is then output to the first three-way valve 23 and delivered to the first mixing pipe 51 through the second output 233 of the first three-way valve 23. The second flow controller 32 delivers the first-level standard alcohol gas from the alcohol gas tank 31 to the first mixing pipe 51 according to the set flow rate. The first mixing pipe 51 mixes the humidified carrier gas with the first-level standard alcohol gas and then delivers the mixture to the breathalyzer being tested through the standard gas pipeline 60. By adjusting the first flow controller 12, the second flow controller 13, and the humidifier 22, standard alcohol gas of the required concentration and humidity can be output to calibrate the alcohol detector.

[0033] When the breathalyzer is not required, the second flow controller 32 is closed to stop the delivery of the primary standard alcohol gas. Simultaneously, the first three-way valve 23 connects the outlet 224 of the humidifier 22 to the moisture recovery unit, delivering moisture to the unit. The moisture recovery unit returns some or all of the components in the moisture to the humidifier 22 for recycling, keeping the humidifier 22 in operation. For ease of description, this operating state is referred to as the recycling state.

[0034] like Figures 1 to 3As shown, in a preferred embodiment, the standard alcohol gas generator further includes a second three-way valve 13. The second three-way valve 13 includes an input terminal 131, a first output terminal 132, and a second output terminal 133. The input terminal 131 of the second three-way valve 13 is connected to the output terminal of the first flow controller 12 (which is also the output terminal of the carrier gas pipeline 10), the first output terminal 132 is connected to the air inlet terminal 21 of the humidification module 20, and the second output terminal 133 is connected to the input terminal of the first mixing pipe 51. Therefore, when humidification is required, the second three-way valve 13 switches to a state where the input terminal 131 is connected to the first output terminal 132 and the input terminal 131 is disconnected from the second output terminal 133. At this time, the carrier gas output from the carrier gas pipeline 10 can flow through the humidification module 20 for humidification. When humidification is not required, the second three-way valve 13 switches to a state where the input terminal 131 is disconnected from the first output terminal 132 and the input terminal 131 is connected to the second output terminal 133. In this state, the carrier gas is directly delivered to the first mixing pipe 51 without passing through the humidification module 20. Therefore, the standard alcohol gas generator of this embodiment can produce both standard alcohol gas with a set humidity and dry standard alcohol gas, increasing the applicability of the standard alcohol gas generator of this embodiment.

[0035] Furthermore, considering that the temperature of exhaled human breath is approximately 34°C, in order to make the temperature of the generated standard alcohol gas closer to that of exhaled human breath, in a preferred embodiment, the standard alcohol gas generating device further includes a heating module 61 disposed on the standard gas pipeline 60. Specifically, the heating module 61 includes a heater and a temperature sensor. The temperature sensor is used to detect the gas temperature in the standard gas pipeline 60, and the heater is used to heat the gas in the standard gas pipeline 60 according to the detection value of the temperature sensor, so that the standard gas pipeline 60 can output standard alcohol gas at approximately 34°C for alcohol detection.

[0036] Furthermore, in addition to air, exhaled gas also contains carbon dioxide. To make the generated standard alcohol gas more closely resemble the composition of actual exhaled gas, in a preferred embodiment, the standard alcohol gas generator further includes a carbon dioxide pipeline 40. The input end of the carbon dioxide pipeline 40 is equipped with a carbon dioxide storage tank 41, which contains primary standard carbon dioxide gas. A third flow controller 42 for controlling the carbon dioxide flow rate is also provided between the input and output ends of the carbon dioxide pipeline 40. The output end of the carbon dioxide pipeline 40 is connected to the input end of the first mixing pipe 51. When a breathalyzer test is required, the third flow controller 42 delivers the carbon dioxide from the carbon dioxide storage tank 41 to the first mixing pipe 51 according to a preset flow rate. The first mixing pipe 51 mixes the primary standard alcohol gas, carbon dioxide, and humidified carrier gas evenly, and then delivers the mixture to the alcohol detector being tested through the standard gas pipeline 60. When a breathalyzer test is not required, the third flow controller 42 stops outputting carbon dioxide to conserve the expensive primary standard carbon dioxide gas.

[0037] To achieve more uniform gas mixing, in a preferred embodiment, the standard alcohol gas generator further includes a second mixing pipe 52. The output ends of the alcohol gas line 30 and the carbon dioxide line 40 are respectively connected to the input end of the second mixing pipe 52, and the output end of the second mixing pipe 52 is connected to the input end of the first mixing pipe 51. Thus, the primary standard gas of alcohol and the primary standard gas of carbon dioxide are first mixed in the second mixing pipe 52, and the resulting mixture of alcohol gas and carbon dioxide is then mixed with the humidified carrier gas in the first mixing pipe 51, thereby making the gas mixing more uniform.

[0038] Furthermore, regarding the moisture recovery component in the humidification module 20, this application provides three exemplary implementations, respectively as follows: Figures 1 to 3 As shown, the details are as follows.

[0039] Implementation Method 1 This embodiment provides a humidification module 20 suitable for a standard alcohol gas generator with discontinuous output. For example... Figure 1 As shown, the humidification module 20 includes an air inlet 21, a humidifier 22, a first three-way valve 23, a water-air separator 24, and an air outlet 25. The water-air separator 24 serves as a moisture recovery component, used to return the moisture in the air to the humidifier 22 for recycling.

[0040] Specifically, the humidifier 22 includes an air inlet 221, a water storage container 222, a humidifying element 223, and an air outlet 224. The air inlet 221 of the humidifier 22 is connected to the air inlet end 21. The humidifying element 223 is used to humidify the carrier air input into the air inlet 221 using the water stored in the water storage container 222 to obtain moisture. The air outlet 224 of the humidifier 22 is used to output moisture.

[0041] The first three-way valve 23 includes an input terminal 231, a first output terminal 232, and a second output terminal 233. The input terminal 231 is connected to the air outlet 224 of the humidifier 22. The first three-way valve 23 is used to output moisture from the first output terminal 232 or the second output terminal 233 to switch between different operating states. The first three-way valve 23 can be a two-position three-way solenoid valve, or it can include two two-position two-way solenoid valves, where the inlet of one two-position two-way solenoid valve is connected to the input terminal 231 and the outlet is connected to the first output terminal 232, and the inlet of the other two-position two-way solenoid valve is connected to the input terminal 231 and the outlet is connected to the second output terminal 233, or other structures capable of splitting gas into two paths and switching between the path states.

[0042] The water-air separator 24 includes an air inlet 241, an air outlet 242, and a water outlet 243. The air inlet 241 of the water-air separator 24 is connected to the first output terminal 232 of the first three-way valve 23. The water outlet 243 of the water-air separator 24 is connected to the water storage container 222 of the humidifier 22. The air outlet 242 of the water-air separator 24 is connected to the atmosphere.

[0043] The outlet 25 is connected to the second output 233 of the first three-way valve 23. The outlet 25 is used to output the humidified carrier gas (referred to as moisture) outside the humidification module 20, for example, to the first mixing pipe 51. The inlet 21 and the outlet 25 can be separate connectors or pipe structures, or the inlet 21 can be the same component as the inlet 221 of the humidifier 22, and the outlet 25 can be the same component as the second output 233 of the first three-way valve 23.

[0044] When moisture needs to be output, the first three-way valve 23 is switched to a state where the input end 231 is disconnected from the first output end 232, and the input end 231 is connected to the second input end 233. The carrier gas to be humidified is input into the humidifier 22 from the inlet end 21. The humidifying element 223 uses the water in the water storage container 222 to humidify the input gas. The humidified gas flows to the first three-way valve 23, which then delivers the humidified gas to the outlet end 25 via the second output end 233. The outlet end 25 then delivers the humidified carrier gas to the first mixing pipe 51. During this process, the first output end 232 of the first three-way valve 23 does not output moisture, and the water-air separator 24 does not work. For ease of description, this working state is referred to as the output state.

[0045] When humidification is not required, the first three-way valve 23 is switched to a state where the input terminal 231 is connected to the first output terminal 232 and the input terminal 231 is disconnected from the second input terminal 233. The carrier gas to be humidified is input into the humidifier 22 from the air inlet 21. The humidifying element 223 uses water in the water storage container 222 to humidify the input carrier gas. The humidified carrier gas flows to the first three-way valve 23. The first three-way valve 23 delivers the humidified carrier gas to the water-air separator 24 through the first output terminal 232. The water-air separator 24 separates the water from the humidified carrier gas to form liquid water, which is then delivered to the water storage container 222 of the humidifier 22 through the water outlet 243 to achieve water recycling. The remaining gas is discharged into the atmosphere from the air outlet 242 of the water-air separator 24. For ease of description, this working state is referred to as the circulation state.

[0046] Therefore, in this embodiment, when the humidification module 20 is in the circulation state, the humidifier 22 is still in normal operation and continues to output stable humidity. That is, whether the humidification module 20 is in the output state or the circulation state, the humidifier 22 is always in operation, and in the circulation state, the humidity of the carrier gas output by the humidifier 22 can be adjusted to the target humidity. Thus, when the humidification module 20 switches from the circulation state to the output state, the operation of the humidifier 22 is not affected; only the flow direction of the output humidity changes, and the output terminal 25 of the humidification module 20 can immediately output stable humidity. When the humidification module 20 of this embodiment is applied to a non-continuous (i.e., intermittent) standard alcohol gas generator, the humidity of the humidity output by the humidification module 20 is already stable when the generator just starts outputting standard alcohol gas. This avoids the influence of unstable humidity generated when the humidifier 22 first starts operating on the final output humidity and alcohol concentration of the standard alcohol gas, thereby making the alcohol detector's detection more accurate. In addition, this embodiment recycles and reuses condensate, avoiding the need to frequently replenish water to the water storage container 222, which is convenient for personnel operation and saves water resources.

[0047] The humidifier 22 can be of various different types. For example, in an optional implementation, such as... Figure 4As shown, the humidifier 22 is a permeation tube humidifier, meaning the humidifying element 223 is a permeation tube 2231 installed inside the water storage container 222. The two ends of the permeation tube 2231 are connected to the air inlet 221 and air outlet 224 of the humidifier 22, respectively. The water storage container 222 contains deionized water, and the permeation tube 2231 is submerged below the liquid surface. Water in the water storage container 222 can permeate from the outside to the inside of the permeation tube 2231, forming water vapor within it. When a gas (such as compressed air, nitrogen, or other carrier gas) flows through the permeation tube 2231, the gas mixes with the water vapor to obtain humidified air with a certain humidity. When the temperature increases, the gas can hold more water vapor, and more water vapor can permeate through the permeation tube 2231; that is, the humidity of the gas output by the humidifier 22 can be adjusted by regulating the temperature. Therefore, a heater is also provided inside the water storage container 222, and a humidity sensor is provided at the air outlet 224. The humidity sensor is used to detect the humidity of the humidified air output from the air outlet 224, and the heater is used to adjust the temperature of the deionized water in the water storage container 222 according to the detection value of the humidity sensor, so that the humidity of the gas output from the air outlet 224 reaches the target value. This humidity adjustment process is carried out when the humidification module is in both the circulation state and the output state. Therefore, when the humidification module switches from the circulation state to the output state, it can output humidified air with stable humidity and a humidity value within the target humidity range from its air outlet 25.

[0048] In another alternative implementation, such as Figure 5 As shown, the humidifier 22 is a bubble humidifier, meaning the humidifying element 223 is a bubbler 2232 connected to the air inlet 221 of the humidifier 22. The water storage container 222 contains deionized water, and the bubbler 2232 is submerged below the liquid surface in the water storage container 222. The water storage container 222 is a sealed container, and the air outlet 224 of the humidifier 22 is located above the liquid surface in the water storage container 222. When gas is introduced through the air inlet 221, the bubbler 2232 disperses the gas into many tiny bubbles that enter the water. Water then enters the bubbles, humidifying the gas within them. After the humidified gas rises above the liquid surface, it bursts and is discharged from the air outlet 224 of the humidifier 22. As the temperature increases, the gas in the bubbles can hold more water vapor; therefore, the humidity of the gas output by the humidifier 22 can be adjusted by regulating the temperature of the deionized water. Therefore, a heater is also provided inside the water storage container 222, and a humidity sensor is provided at the air outlet 224. The humidity sensor is used to detect the humidity of the moisture output from the air outlet 224, and the heater is used to adjust the water temperature of the deionized water in the water storage container 222 according to the detection value of the humidity sensor, so that the humidity of the gas output from the air outlet 224 reaches the target value.

[0049] The water-air separator 24 can separate moisture from the humid air through condensation. In an optional embodiment, such as... Figure 6 As shown, the water-air separator 24 includes a condensing chamber 244 and a condenser 245. The condensing chamber 244 is in contact with the condenser 245 for heat exchange. The condenser 245 can be a finned radiator, a heat exchange coil, a semiconductor cooling chip, etc. The air inlet 241 and air outlet 242 of the water-air separator 24 are connected to the condensing chamber 244 from the side or top surface, respectively. The water outlet 243 of the water-air separator 24 is connected to the condensing chamber 244 from the bottom surface. When the humid air flows through the condensing chamber 244, it undergoes heat exchange with the condenser 245 and its temperature decreases. The water vapor in the humid air condenses to form condensate. The condensate accumulates at the bottom of the condensing chamber 244 under the action of gravity and is transported to the water storage container 222 of the humidifier 22 through the water outlet 243 located at the bottom of the condensing chamber 244.

[0050] In order to improve drainage efficiency and reduce the residue of condensate at the bottom of the condensation chamber 244, in a preferred embodiment, the bottom surface of the condensation chamber 244 is an inclined surface or a curved surface, and the outlet 243 is located at the lowest point of the inclined surface or the curved surface.

[0051] In a preferred embodiment, the condensation chamber 244 is further provided with a plurality of baffles 247, which are staggered to form a tortuous airflow channel in the condensation chamber 244, thereby increasing the heat exchange area and allowing the moisture in the humid air to be condensed more fully, thus enabling more efficient recovery of condensate.

[0052] To further improve heat exchange efficiency, in a preferred embodiment, the sidewalls, top wall, and bottom wall surrounding the condenser cavity 244, as well as the baffles 247 disposed within the condenser cavity 244, are all made of a metal material with good thermal conductivity.

[0053] To prevent moisture from escaping from the outlet 243 when passing through the water-air separator 24, a two-way solenoid valve can be installed at the outlet 243. The solenoid valve is normally closed. When a certain amount of condensate accumulates, the solenoid valve is opened or opened for a certain period of time to drain the condensate.

[0054] In this embodiment, water vapor separation is achieved by lowering the moisture temperature. In other embodiments, water vapor separation can also be achieved by increasing the moisture pressure or by using filtration.

[0055] Implementation Method 2 like Figure 2As shown, the main difference between this second embodiment and the first embodiment is that in this embodiment, the moisture recovery component includes a water-gas separator 24 and an air pump 26, which further recovers and reuses the gas output from the outlet 242 of the water-gas separator 24, instead of releasing it into the atmosphere.

[0056] In this embodiment, such as Figure 2 As shown, the outlet 242 of the water-air separator 24 is connected to the inlet 221 of the humidifier 22. In one optional embodiment, an air pump 26 is installed on the pipeline between the outlet 242 of the water-air separator 24 and the inlet 221 of the humidifier 22, with the input end of the air pump 26 connected to the outlet 242 of the water-air separator 24 and the output end of the air pump 26 connected to the inlet 221 of the humidifier 22. In another optional embodiment, the air pump 26 is installed on the pipeline between the first output end 232 of the first three-way valve 23 and the inlet 241 of the water-air separator 24, with the input end of the air pump 26 connected to the first output end 232 of the first three-way valve 23 and the output end of the air pump 26 connected to the inlet 241 of the water-air separator 24.

[0057] In this embodiment, when the humidification module 20 is in circulation mode, the air inlet 21 stops inputting carrier gas, and the power for the gas circulation within the humidification module 20 is provided by the air pump 26. The air pump 26 inputs carrier gas into the humidifier 22 from the air inlet 221. The humidification element 223 uses the water stored in the water storage container 222 to humidify the input carrier gas. The humidified gas is then delivered from the air outlet 224 of the humidifier 22 to the first three-way valve 23. The first three-way valve 23 delivers the humidified gas to the water-air separator 24. The water-air separator 24 separates the moisture from the humidified gas to form condensate, and delivers the condensate to the water storage container 222. The remaining gas after the moisture has been separated is delivered to the air pump 26, thereby forming air circulation and water circulation.

[0058] When the humidification module 20 is in circulation mode, the humidifier 22 continues to operate normally, continuously outputting humidified air with stable humidity. In other words, whether the humidification module 20 is in output or circulation mode, the humidifier 22 is always running, and in circulation mode, the humidity of the air output by the humidifier 22 can be adjusted to the target humidity. When the humidification module 20 switches from circulation mode to output mode, a set flow rate of input gas is provided to the humidifier 22 through the air inlet 21, and the air pump 26 stops supplying gas to the humidifier 22. At this time, the operation of the humidifier 22 is unaffected; only the flow direction of the output humidified air changes, and the output end 25 of the humidification module can immediately output humidified air with stable humidity.

[0059] In this embodiment, not only can the moisture in the humidifier 22 be recycled and reused, but the remaining gas after the moisture is recycled can also be recycled and reused. Therefore, in the circulation state, there is no need to continue to supply carrier gas to the humidification module 20 through the air inlet 21, which can save gas.

[0060] When the humidification module 20 is in circulation mode, if a leak occurs in the pipeline, the amount of gas circulating will decrease, thus affecting the normal operation of the circulation mode. To solve this technical problem, in a preferred embodiment, such as... Figure 2 As shown, a leak sensor 27 is also provided to detect whether a leak has occurred in the pipeline. The leak sensor 27 is installed in the pipeline between the air outlet 224 of the humidifier 22 and the input end 231 of the first three-way valve 23, or in the pipeline between the first output end 232 of the first three-way valve 23 and the air inlet 241 of the water-air separator 24, or in the pipeline between the air outlet 242 of the water-air separator 24 and the air inlet 221 of the humidifier 22. When the leak sensor 27 detects a leak, carrier air needs to be added to the humidification module from the air inlet 21 until the leak sensor 27 detects that there is no longer a leak. The leak sensor 27 can be a pressure sensor; when the detected pressure value drops below a preset threshold, it can be determined that a leak has occurred; when carrier air is added to the humidification module from the air inlet 21 and the pressure returns to the set threshold, it can be considered that there is no longer a leak. Leakage sensor 27 can also be a flow sensor. When the flow rate drops below a preset threshold, it can be determined that a leak has occurred. When the flow rate is restored to the set threshold by replenishing carrier gas from the air inlet 21 to the humidification module, it can be considered that there is no longer a leak.

[0061] To minimize the impact of the positive pressure at the output end and the negative pressure at the input end of the air pump 26 on the pressure or flow detection of the leakage sensor 27, the leakage sensor 27 should be installed away from the air pump 26. For example, when the air pump 26 is installed in the pipeline between the outlet 242 of the water-air separator 24 and the inlet 221 of the humidifier 22, the leakage sensor 27 can be installed in the pipeline between the outlet 224 of the humidifier 22 and the input end 231 of the first three-way valve 23, or in the pipeline between the first output end 232 of the first three-way valve 23 and the inlet 241 of the water-air separator 24. When the air pump 26 is installed in the pipeline between the first output end 232 of the first three-way valve 23 and the inlet 241 of the water-air separator 24, the leakage sensor 27 can be installed in the pipeline between the outlet 242 of the water-air separator 24 and the inlet 221 of the humidifier 22.

[0062] The humidifier 22 and water-air separator 24 described in Embodiment 1 are also applicable to this embodiment, and will not be described again here.

[0063] Implementation Method 3 The main difference between this third embodiment and the first and second embodiments is that, in this embodiment, the water-air separator 24 is not provided, and only the air pump 26 is used as the moisture recovery component to directly recover and reuse the humidified gas, thereby making the structure of the humidification module 20 simpler and the cost lower.

[0064] Specifically, such as Figure 3 As shown, the humidification module of this embodiment includes an air inlet 21, a humidifier 22, a first three-way valve 23, an air outlet 25, and an air pump 26. The humidifier 22 includes an air inlet 221, a water storage container 222, a humidifying element 223, and an air outlet 224. The air inlet 221 is connected to the air inlet 21. The humidifying element 223 uses water stored in the water storage container 222 to humidify the air input to the air inlet 221, and the air outlet 224 is used to output the humidified air. The first three-way valve 23 includes an input end 231, a first output end 232, and a second output end 233. The input end 231 is connected to the air outlet 224 of the humidifier 22. The first three-way valve 23 allows humidified air to be output from either the first output end 232 or the second output end 233, thus switching the humidification module between a circulation state and an output state. An air pump 26 is installed in the pipeline between the first output terminal 232 of the first three-way valve 23 and the air inlet 221 of the humidifier 22. The input terminal of the air pump 26 is connected to the first output terminal 232 of the first three-way valve 23, and the output terminal of the air pump 26 is connected to the air inlet 221 of the humidifier 22. The air outlet 25 is connected to the second output terminal 233 of the first three-way valve 23, and the air outlet 25 is used to output the humidified gas outside the humidification module 20, for example, to the first mixing pipe 51.

[0065] In this embodiment, when the humidification module 20 is in circulation mode, the air inlet 21 stops inputting carrier gas, and the power for the gas circulation within the humidification module 20 is provided by the air pump 26, thereby saving gas. The air pump 26 inputs carrier gas into the humidifier 22 from the air inlet 221. The humidification element 223 uses the water stored in the water storage container 222 to humidify the input carrier gas. The humidified carrier gas flows back to the air pump 26 through the air outlet 224 of the humidifier 22 and the first three-way valve 23, thereby forming a circulation flow.

[0066] When the humidification module 20 is in circulation mode, the humidifier 22 continues to operate normally, continuously outputting humidified air with stable humidity. In other words, whether the humidification module 20 is in output or circulation mode, the humidifier 22 is always running, and in circulation mode, the humidity of the air output by the humidifier 22 can be adjusted to the target humidity. Therefore, when the humidification module switches from circulation mode to output mode, a set flow rate of input gas is provided to the humidifier 22 through the air inlet 21, and the air pump 26 stops supplying gas to the humidifier 22. At this time, the operating state of the humidifier 22 is unaffected; only the flow direction of the humidified air output by the humidifier 22 changes, and the output end 25 of the humidification module can immediately output humidified air with stable humidity.

[0067] When the humidification module 20 is in circulation mode, if a leak occurs in the pipeline, the amount of gas circulating will decrease, thus affecting the normal operation of the circulation mode. To solve this technical problem, in a preferred embodiment, such as... Figure 3 As shown, a leak sensor 27 is also provided for detecting whether a leak has occurred in the pipeline. To reduce the impact of the positive pressure at the output end and the negative pressure at the input end of the air pump 26 on the pressure or flow detection of the leak sensor 27, the leak sensor 27 should be located away from the air pump 26. Therefore, in this embodiment, the air pump 26 is located in the pipeline between the first output end 232 of the first three-way valve 23 and the air inlet 221 of the humidifier 22, while the leak sensor 27 is located in the pipeline between the air outlet 224 of the humidifier 22 and the input end 231 of the first three-way valve 23.

[0068] When the leakage sensor 27 detects a leak, gas needs to be supplied to the humidification module from the air inlet 21 until the leakage sensor 27 detects that there is no longer a leak. The leakage sensor 27 can be a pressure sensor; when the detected pressure value drops below a preset threshold, a leak is considered to have occurred; when gas is supplied to the humidification module from the air inlet 21 and the pressure returns to the set threshold, the leak is considered to have ceased. Alternatively, the leakage sensor 27 can be a flow sensor; when the detected flow rate drops below a preset threshold, a leak is considered to have occurred; when gas is supplied to the humidification module from the air inlet 21 and the flow rate returns to the set threshold, the leak is considered to have ceased.

[0069] The humidifier 22 described in Embodiment 1 is also applicable to this embodiment, and will not be described again here.

[0070] In the technical solution of this application, a water-air separator 24 and / or an air pump 26 are provided as moisture recovery components for moisture recovery and reuse. Therefore, the humidification module 20 of this application has an output state in which the moisture generated by the humidifier 22 is normally output to the outside, and a cyclic state in which the moisture generated by the humidifier 22 is not output to the outside and some or all of the components of the moisture generated by the humidifier 22 are recovered and reused. Whether the humidification module 20 is in the output state or the cyclic state, the humidifier 22 is always in the operating state, and in the cyclic state, the humidity of the carrier gas output by the humidifier 22 can be adjusted to the target humidity first. In this way, when the humidification module 20 switches from the cyclic state to the output state and starts to output moisture, only the flow direction of the moisture output by the humidifier 22 is changed, and the operating state of the humidifier 22 is not affected, nor is the humidity stability of the moisture. The output terminal 25 of the humidification module can immediately output moisture with stable humidity. Therefore, when the humidification module 20 of this application is applied to a standard alcohol gas generator, even at the very beginning of the standard alcohol gas output, the humidity of the moisture output by the humidification module 20 is already stable. This avoids the influence of unstable humidity generated when the humidifier 22 first starts operating, which could affect the humidity and alcohol concentration of the final output standard alcohol gas, thus making the alcohol detector more accurate. Furthermore, this application recycles condensate and / or gas, avoiding the need for frequent replenishment of water and / or gas to the humidifier 22, which simplifies operation and conserves water and / or gas resources.

[0071] Furthermore, this application also provides a standard alcohol gas generation method applicable to a standard alcohol gas generator with discontinuous output, comprising the steps S10 to S40.

[0072] S10. Install a humidification module 20. The humidification module 20 includes an air inlet 21, a humidifier 22, a first three-way valve 23, a moisture recovery component, and an air outlet 25. The air inlet 21 is connected to the air inlet 221 of the humidifier 22, the air outlet 224 of the humidifier 22 is connected to the input 231 of the first three-way valve 23, the first output 232 of the first three-way valve 23 is connected to the moisture recovery component, and the second output 233 of the first three-way valve 23 is connected to the air outlet 25. The moisture recovery component is used to return some or all of the components in the moisture to the humidifier 22 for recycling.

[0073] In one preferred embodiment, the moisture recovery component is a water-air separator 24. In another preferred embodiment, the moisture recovery component includes a water-air separator 24 and an air pump 26. In yet another preferred embodiment, the moisture recovery component is an air pump 26.

[0074] S20. Determine whether the humidification module 20 needs to output moisture, that is, determine whether it needs to output standard alcohol gas to the alcohol detector being tested.

[0075] Specifically, the need for the humidification module 20 to output moisture can be determined by the operating status of the standard alcohol gas generator. For example, when the standard alcohol gas generator needs to blow air onto the alcohol detector being tested, the humidification module 20 needs to output moisture; during the interval between two consecutive blows, the humidification module 20 does not need to output moisture. In this application, regardless of whether the humidification module 20 needs to output moisture, the humidifier 22 remains in operation and does not require frequent starting and stopping, thus enabling the humidifier 22 to continuously output moisture with stable humidity. When the humidification module 20 needs to output moisture, the first three-way valve 23 delivers the moisture output from the humidifier 22 to the outlet 25 of the humidification module 20, and the outlet 25 delivers the moisture to the first mixing pipe 51. When the humidification module 20 does not need to output moisture, the first three-way valve 23 delivers the moisture output from the humidifier 22 to the moisture recovery component, which recovers some or all of the components in the moisture. Since the humidifier 22 operates continuously, the humidity of the moisture produced by the humidifier 22 is already stable before the humidification module 20 starts outputting moisture. When the humidification module 20 switches from the circulation state to the output state and just starts outputting moisture, it only changes the path of the moisture output by the humidifier 22, without changing the working state of the humidifier 22 or affecting the humidity stability. Therefore, the humidification module 20 can output stable moisture as soon as it starts outputting moisture.

[0076] S30. If the humidification module 20 needs to output moisture, the first flow controller 12 is turned on, allowing the carrier gas to enter the humidifier 22 through the inlet 21 of the humidification module 20 for humidification; and the first three-way valve 23 is controlled to deliver the moisture output by the humidifier 22 to the outlet 25. This step corresponds to the humidification module 20 being in the output state in the aforementioned embodiments. The second flow controller 32 is turned on, delivering the primary standard alcohol gas to the first mixing pipe 51; the moisture and the primary standard alcohol gas are mixed in the first mixing pipe 51 to obtain standard alcohol gas, which is then output through the standard gas pipeline 60.

[0077] When the humidification module 20 of this application is applied to a non-continuously output standard alcohol gas generator, the humidity of the humidification module 20 is already stable when the generator just starts to output standard alcohol gas. This avoids the influence of unstable humidity generated when the humidifier 22 starts to run, which would affect the humidity and alcohol concentration of the final output standard alcohol gas, thus making the alcohol detector more accurate.

[0078] S40. If the humidification module 20 does not need to output moisture, the second flow controller 32 is controlled to close, stopping the delivery of the alcohol standard gas; the first three-way valve 23 is controlled to deliver the moisture output from the humidifier 22 to the moisture recovery component; the moisture recovery component returns some or all of the components in the moisture to the humidifier 22 for recycling, and keeps the humidifier 22 in operation. When this step is performed, the humidification module 20 is in a recycling state in the aforementioned embodiments.

[0079] When the humidification module 20 is the humidification module 20 described in Embodiment 1, such as Figure 1 As shown, during the interval between two consecutive breath tests, i.e., when no breath test is required, the first three-way valve 23 switches to a state where the input terminal 231 is connected to the first output terminal 232 and the input terminal 231 is disconnected from the second output terminal 233. At this time, the humidification module 20 is in a circulation state. The first flow controller 12 delivers the carrier gas in the carrier gas storage tank 11 to the humidifier 22 for humidification according to the set flow rate. The humidified carrier gas is output to the first three-way valve 23 and delivered to the water-gas separator 24 through the first output terminal 232 of the first three-way valve 23. The water-gas separator 24 delivers the separated condensate to the water storage container 222 of the humidifier 22 for recycling and discharges the remaining gas after separating the condensate into the atmosphere. The second flow controller 32 stops outputting national first-class standard alcohol gas to the first mixing pipe 51 to save the expensive first-class standard alcohol gas.

[0080] In this preferred embodiment, the air outlet 242 of the water-air separator 24 is connected to the atmosphere. To ensure continuous operation of the humidifier 22, step S40 further includes: S41. Carrier gas to be humidified is continuously input through the air inlet 21 of the humidification module 20.

[0081] This implementation method recycles and reuses condensate, avoiding the need to frequently replenish water to the water storage container 222, which is convenient for personnel operation and saves water resources.

[0082] When the humidification module 20 is the humidification module 20 described in Embodiment 2, such as Figure 2As shown, during the interval between two consecutive breaths, i.e. when the breathalyzer does not need to be blown, the first three-way valve 23 switches to a state where the input end 231 is connected to the first output end 232 and the input end is disconnected from the second output end 233 of 231. At this time, the humidification module 20 is in a circulating state. The first flow controller 12 and the second flow controller 32 both stop outputting gas, thereby saving both the first-level standard gas for alcohol and the carrier gas. In the humidification module 20, the humidifier 22 outputs moisture to the first three-way valve 23. The first three-way valve 23 delivers the moisture to the water-gas separator 24 through the first output end 232. The water-gas separator 24 separates the water in the moisture to form condensate, which is then delivered to the water storage container 222 of the humidifier 22. The remaining gas after the condensate is separated is delivered to the air inlet 221 of the humidifier 22, thus forming a circulating flow. The power for the circulating flow is provided by the air pump 26. In this embodiment, not only is the moisture in the humidity recycled and reused, but the remaining gas after the moisture is removed is also recycled and reused. When the humidification module 20 is in a circulation state, there is no need to input the gas to be humidified (carrier gas), thus saving the gas to be humidified.

[0083] However, if the humidification module 20 leaks, it will be unable to maintain normal operation in the circulation state. To solve this technical problem, in a preferred embodiment, a leak sensor 27 is also included. The leak sensor 27 is disposed in the pipeline between the air outlet 224 of the humidifier 22 and the input terminal 231 of the first three-way valve 23, or in the pipeline between the first output terminal 232 of the first three-way valve 23 and the air inlet 241 of the water-air separator 24, or in the pipeline between the air outlet 242 of the water-air separator 24 and the air inlet 221 of the humidifier 22.

[0084] When the humidification module 20 is the humidification module 20 described in Embodiment 3, such as Figure 3 As shown, during the interval between two consecutive breaths, i.e., when no breaths are needed on the alcohol detector, the first three-way valve 23 switches to a state where the input terminal 231 is connected to the first output terminal 232 and the input terminal 231 is disconnected from the second output terminal 233. At this time, the humidification module 20 is in a circulating state. Both the first flow controller 12 and the second flow controller 32 stop outputting gas, thereby saving both the first-level standard gas for alcohol and the carrier gas. In the humidification module 20, the humidifier 22 outputs moisture to the first three-way valve 23, which then delivers the moisture to the air pump 26 through the first output terminal 232. The air pump 26 delivers the moisture to the air inlet 221 of the humidifier 22, thus forming a circulating flow. The power for the circulating flow is provided by the air pump 26. In this embodiment, moisture recovery is achieved using only the air pump 26, making the structure of the humidification module 20 simpler and the cost lower.

[0085] To avoid the impact of gas leakage in the humidification module 20, in a preferred embodiment, a leakage sensor 27 is also included. The leakage sensor 27 is disposed on the pipeline between the air outlet 224 of the humidifier 22 and the first three-way valve 23, or on the pipeline between the first output end 232 of the first three-way valve 23 and the air inlet 221 of the humidifier 22.

[0086] As can be seen, when the humidification module 20 is the humidification module 20 in Embodiment 2 or Embodiment 3, in a preferred embodiment, when the humidification module 20 is in the circulation state, the first flow controller 12 is controlled by the detection value of the leakage sensor 27. When the pressure or flow value detected by the leakage sensor 27 is less than a preset threshold, it indicates that the gas in the humidification module 20 has leaked, and the first flow controller 12 is controlled to start to replenish the gas in the humidification module 20 so that the humidification module 20 can operate normally in the circulation state; when the pressure or flow value detected by the leakage sensor 27 is greater than the preset threshold, it indicates that enough gas has been replenished in the humidification module 20, and the first flow controller 12 is controlled to stop replenishing the gas in the humidification module 20.

[0087] In embodiments two and three, in the cyclic state, in order to achieve continuous operation of the humidifier 22, the air pump 26 delivers gas; therefore, step S40 further includes: S42. When standard alcohol gas is not required to be output, the first flow controller 12 is turned off to stop supplying carrier gas to the humidification module 20; the air pump 26 is started, and the first three-way valve 31 is controlled to connect the air outlet 224 of the humidifier 22 with the moisture recovery component, so that the moisture is delivered to the moisture recovery component; the moisture recovery component delivers all components in the moisture back to the humidifier 22 for recycling and keeps the humidifier 22 in operation.

[0088] In a preferred embodiment, step S40 further includes: S43. If the pressure or flow rate detected by the leakage sensor 27 is lower than the preset threshold, the gas to be humidified (carrier gas) is input through the air inlet 21. S44. If the pressure or flow rate detected by the leakage sensor 27 reaches a preset threshold, the input of the gas to be humidified through the air inlet 21 shall be stopped.

[0089] The technical solution of this application includes a moisture recovery component for recovering some or all components of the moisture. Therefore, the humidification module 20 of this application has an output state in which the moisture generated by the humidifier 22 is normally output to the outside, and a cyclic state in which the moisture generated by the humidifier 22 is not output to the outside and some or all components of the moisture generated by the humidifier 22 are recovered and utilized. Whether the humidification module 20 is in the output state or the cyclic state, the humidifier 22 is always in the operating state. In the cyclic state, the humidity of the gas output by the humidifier 22 can be adjusted to the target humidity first. Therefore, when the humidification module 20 switches from the cyclic state to the output state and starts to output moisture, it only changes the flow direction of the moisture output by the humidifier 22. The operating state of the humidifier 22 is not affected, and the humidity stability of the moisture is not affected. The output terminal 25 of the humidification module 20 can immediately output moisture with stable humidity. Therefore, when the standard alcohol gas generator of this application just starts to output standard alcohol gas, the humidity of the moisture output by the humidification module 20 is already stable, avoiding the influence of unstable humidity of the moisture generated when the humidifier 22 starts to run on the humidity of the final output standard alcohol gas and the alcohol concentration, thereby making the alcohol detector more accurate.

[0090] The above embodiments are only described using the humidification module 20 in a standard alcohol gas generator as an example. However, the humidification module 20 of this application is not limited to the application in a standard alcohol gas generator. It can also be applied in other types of equipment such as carbon monoxide gas generators and nitrogen oxide gas generators, or used as a standalone humidification device.

[0091] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0092] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A standard alcohol gas generator, characterized in that, Includes carrier gas pipeline, humidification module, alcohol gas pipeline, first mixing pipeline and standard gas pipeline; The input end of the carrier gas pipeline is equipped with a carrier gas storage tank, and the output end of the carrier gas pipeline is connected to the air inlet end of the humidification module; a first flow controller is provided between the input end and the output end of the carrier gas pipeline. The humidification module includes an air inlet, a humidifier, a first three-way valve, a moisture recovery component, and an air outlet. The humidifier includes an air inlet, a water storage container, a humidifying element, and an air outlet. The air inlet of the humidifier is connected to the air inlet of the humidification module. The humidifying element is disposed within the water storage container. The air outlet of the humidifier is used to output moisture. The air outlet of the humidifier is connected to the input of the first three-way valve. The first three-way valve also includes a first output and a second output. The first output of the first three-way valve is connected to the moisture recovery component, and the second output of the first three-way valve is connected to the air outlet of the humidification module. The moisture recovery component is used to return some or all components of the moisture to the humidifier for recycling. The air outlet of the humidification module is connected to the input of the first mixing pipe. The alcohol gas pipeline has an alcohol gas storage tank at its inlet; the alcohol gas pipeline is connected to the inlet of the first mixing pipe; and a second flow controller is provided between the inlet and outlet of the alcohol gas pipeline. The output end of the first mixing tube is connected to the input end of the standard gas line; the output end of the standard gas line is connected to the alcohol detector being tested.

2. The standard alcohol gas generator according to claim 1, characterized in that, It also includes a second three-way valve; the second three-way valve includes an input end, a first output end and a second output end; the input end of the second three-way valve is connected to the output end of the carrier gas pipeline; the first output end of the second three-way valve is connected to the air inlet end of the humidification module; the second output end of the second three-way valve is connected to the input end of the first mixing pipe.

3. The standard alcohol gas generator according to claim 1, characterized in that, The standard gas pipeline is also equipped with a heating module; the heating module includes a heater and a temperature sensor; the temperature sensor is used to detect the gas temperature in the standard gas pipeline; the heater is used to heat the gas in the standard gas pipeline according to the detection value of the temperature sensor, so that the standard gas pipeline outputs standard alcohol gas at a preset temperature.

4. The standard alcohol gas generator according to claim 1, characterized in that, It also includes a carbon dioxide pipeline; the input end of the carbon dioxide pipeline is equipped with a carbon dioxide storage tank; the output end of the carbon dioxide pipeline is connected to the input end of the first mixing pipe; a third flow controller is provided between the input end and the output end of the carbon dioxide pipeline.

5. The standard alcohol gas generator according to claim 4, characterized in that, It also includes a second mixing pipe; the output end of the alcohol gas pipe and the output end of the carbon dioxide pipe are respectively connected to the input end of the second mixing pipe; the output end of the second mixing pipe is connected to the input end of the first mixing pipe.

6. The standard alcohol gas generator according to any one of claims 1-5, characterized in that, The humidifying element is a permeation tube or a bubbler, used to humidify the carrier gas input into the air inlet of the humidifier by using the water stored in the water storage container to obtain moisture.

7. The standard alcohol gas generator according to any one of claims 1-5, characterized in that, The moisture recovery component is a water-air separator; the water-air separator includes an air inlet, an air outlet, and a water outlet; the air inlet of the water-air separator is connected to the first output terminal of the three-way valve; the water outlet of the water-air separator is connected to the water storage container of the humidifier; the air outlet of the water-air separator is connected to the atmosphere.

8. The standard alcohol gas generator according to any one of claims 1-5, characterized in that, The moisture recovery component includes a water-air separator and an air pump; the water-air separator includes an air inlet, an air outlet, and a water outlet; the water outlet of the water-air separator is connected to the water storage container of the humidifier; the air pump is installed on the pipeline between the air outlet of the water-air separator and the air inlet of the humidifier, the air inlet of the water-air separator is connected to the first output terminal of the three-way valve, the input terminal of the air pump is connected to the air outlet of the water-air separator, and the output terminal of the air pump is connected to the air inlet of the humidifier; or, the air pump is installed on the pipeline between the first output terminal of the three-way valve and the air inlet of the water-air separator, the input terminal of the air pump is connected to the first output terminal of the three-way valve, the output terminal of the air pump is connected to the air inlet of the water-air separator, and the air outlet of the water-air separator is connected to the air inlet of the humidifier.

9. The standard alcohol gas generator according to any one of claims 1-5, characterized in that, The moisture recovery component is an air pump; the input end of the air pump is connected to the first output end of the first three-way valve; the output end of the air pump is connected to the air inlet of the humidifier.

10. A method for generating standard alcohol gas, applied to the standard alcohol gas generating apparatus as described in claim 1, characterized in that, Includes the following steps: Carrier gas is supplied through a carrier gas storage tank, and alcohol standard gas is supplied through an alcohol gas storage tank. Determine whether it is necessary to output standard alcohol gas to the alcohol detector being tested; If standard alcohol gas needs to be output, the first flow controller is activated, allowing the carrier gas to enter the humidifier through the inlet of the humidification module for humidification to obtain humidified gas; the first three-way valve is activated to connect the outlet of the humidifier with the outlet of the humidification module, delivering the humidified gas to the first mixing pipe; the second flow controller is activated, delivering the primary standard alcohol gas to the first mixing pipe; the humidified gas and the primary standard alcohol gas are mixed in the first mixing pipe to obtain standard alcohol gas, which is then output through the standard gas pipeline; If the standard alcohol gas is not required to be output, the second flow controller is controlled to close, stopping the delivery of the first-level standard alcohol gas; the first three-way valve is controlled to connect the outlet of the humidifier with the moisture recovery component, delivering the moisture to the moisture recovery component; The moisture recovery component transports some or all of the components in the moisture back to the humidifier for recycling and keeps the humidifier in operation.

Images