Device for simulating expiration

Abstract

The utility model discloses a device for simulating expiration, and relates to the technical field of simulation testing, the device comprises a first air supply part and an atomization part, the atomization part is provided with a liquid preparation cavity, the liquid preparation cavity is used for placing a prefabricated substance solution, an atomization structure is arranged in the liquid preparation cavity, the first air supply part is communicated with the atomization structure, and the atomization structure is communicated with the first air supply part. And the atomization structure atomizes the prefabricated substance solution under the action of high-pressure air provided by the first air supply part. The embodiment of the utility model provides a device for simulating expiration, which can truly simulate airflow exhaled by a person so as to simulate an expiration clinical sample, so that research results such as a detection method, a sampling tool, a detection device and the like can be effectively evaluated in real time in a research and development stage through expiration.

Description

Technical Field

[0001] The present application relates to the field of simulation test technology, and in particular to a device for simulating exhalation. Background Art

[0002] Breath drug testing is a new type of drug testing method, which is of great significance for expanding the scope of drug testing and accelerating the speed of drug testing, especially for drug road tests such as drug driving inspections. However, for R&D personnel, there is a lack of clinical breath samples, and it is impossible to conduct real-time and effective evaluation of research results such as breath drug testing methods, sampling tools, and detection devices during the R&D stage. Utility Model Content

[0003] The present application aims to solve at least one of the above technical problems in the prior art to a certain extent. To this end, the present application provides a device for simulating exhalation, which can truly simulate the airflow exhaled by a person and facilitate the exhalation detection test.

[0004] The device for simulating exhalation according to the embodiment of the present application includes a first air supply member and an atomizing part, the atomizing part has a liquid preparation chamber, the liquid preparation chamber is used to place a prefabricated substance solution, an atomizing structure is arranged in the liquid preparation chamber, the first air supply member is connected to the atomizing structure, and the atomizing structure atomizes the prefabricated substance solution under the action of the airflow provided by the first air supply member.

[0005] According to the device for simulating exhalation described in the embodiment of the present application, an air inlet channel is configured at the bottom of the liquid preparation chamber, the liquid level of the prefabricated substance solution is lower than the air outlet of the air inlet channel, a drainage channel is provided on the outside of the air inlet channel, and a collision member is provided above the drainage outlet of the drainage channel, and the drainage channel, the air inlet channel and the collision member constitute the atomization structure.

[0006] According to the device for simulating exhalation described in the embodiment of the present application, an intercepting member is further provided in the liquid preparation chamber, the intercepting member cover is provided outside the collision member, and the end of the intercepting member extends to be lower than the drainage outlet.

[0007] According to the device for simulating exhalation described in the embodiment of the present application, the intercepting member is cylindrical, and the diameter of the end of the intercepting member close to the drainage outlet is larger than that of the other end.

[0008] According to the device for simulating exhalation described in the embodiment of the present application, the channel width between the air inlet and the air outlet of the air inlet channel gradually decreases.

[0009] According to the device for simulating exhalation described in an embodiment of the present application, the atomization part includes a liquid preparation cup having the liquid preparation chamber, the bottom of the liquid preparation cup bulges toward the top to form the air inlet channel, and the air outlet is arranged at the top of the bulging part of the bottom of the liquid preparation cup.

[0010] According to the device for simulating exhalation described in the embodiment of the present application, a layer of limiting plates is arranged around the periphery of the raised portion at the bottom of the liquid preparation cup to form the drainage channel, and there is a gap between the limiting plates and the bottom of the liquid preparation cup.

[0011] According to the device for simulating exhalation described in the embodiment of the present application, the air inlet channel is connected to the first air supply member through a first conduit, and a first flow meter is provided on the first conduit.

[0012] According to the device for simulating exhalation described in the embodiment of the present application, the liquid preparation cup is provided with an air outlet conduit, and the air outlet conduit is provided with a dilution conduit for conveying gas to the air outlet conduit.

[0013] According to the device for simulating exhalation described in the embodiment of the present application, a first solenoid valve and a second flow meter are provided on the dilution conduit.

[0014] The above-mentioned device for simulating exhalation has at least the following beneficial effects: when it is necessary to perform simulated exhalation detection on a specific group of people, the prefabricated material solution is prepared in advance and placed in the liquid preparation chamber on standby. After completion, the first air supply component releases an airflow, and the airflow drives the prefabricated material solution to be atomized after passing through the atomization structure. The atomized airflow can simulate the gas exhaled by the human body after drinking a similar prefabricated material solution, which is convenient for subsequent detection or for real-time and effective evaluation of research results such as sampling tools and detection devices. In addition, the device can adjust the air supply airflow size of the first air supply component or different types of prefabricated material solutions to simulate the exhalation conditions of different groups of people, and has strong applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present application is further described below with reference to the accompanying drawings and embodiments;

[0016] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application;

[0017] Figure 2 It is a structural schematic diagram of the atomization unit in an embodiment of the present application. DETAILED DESCRIPTION

[0018] This section will describe in detail the specific embodiments of the present application. The preferred embodiments of the present application are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present application, but it cannot be understood as a limitation on the scope of protection of the present application.

[0019] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0020] In the description of this application, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0021] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0022] Breath drug testing is a new type of drug testing method. It is of great significance to expand the scope of drug testing, accelerate the speed of drug testing, and especially for drug road inspections such as drug driving inspections. Under the current circumstances, it is difficult to obtain breath samples for drug testing, and it is not realistic to personally try the samples. For R&D personnel, they are faced with a lack of clinical breath samples. During the R&D stage, they cannot conduct real-time and effective evaluation of research results such as breath drug detection methods, sampling tools, and detection devices, which will affect the R&D process and cannot conduct comprehensive testing and evaluation. Therefore, it is necessary to develop a breath simulation method that can simulate the breath components of different drug users. This will help to conduct in-depth research on breath drug testing methods and promote the development of the breath detection field.

[0023] Reference Figure 1 The embodiment of the present application provides a device for simulating exhalation, which specifically includes a first air supply member 500 and an atomization unit 200. The atomization unit 200 has a liquid preparation chamber, which is used to place a prefabricated material solution. An atomization structure is arranged in the liquid preparation chamber. The first air supply member 500 is connected to the atomization structure. The atomization structure atomizes the prefabricated material solution under the action of the airflow provided by the first air supply member 500.

[0024] It should be noted that when it is necessary to simulate breath detection of a specific group of people, the prefabricated material solution is prepared in advance. For example, to simulate the exhalation of a person after drinking, a prefabricated material solution of alcohol is prepared. After preparation, the prefabricated material solution is placed in the liquid preparation chamber for standby. After completion, the first air supply member 500 releases compressed air, and the airflow drives the prefabricated material solution to atomize after passing through the atomization structure. The atomized airflow simulates the exhaled gas of the human body after drinking, which is convenient for subsequent detection or for real-time and effective evaluation of research results such as sampling tools and detection devices. The device can simulate the exhalation of different people by adjusting the air supply airflow size of the first air supply member 500 or replacing different types of prefabricated material solutions in the liquid preparation chamber. Therefore, the device has strong applicability; furthermore, the entire device has a simple structure and is easy to manufacture.

[0025] Of course, the prefabricated material solution of the present application can be an illegal drug under compliance conditions, and the illegal drug can be drugs and / or drug metabolites, so that the human breath simulation device of the present application can simulate the actual breath conditions of people who inhale different substances or drugs to be tested, which is helpful for in-depth research on breath drug testing methods and promote the development of breath drug testing technology.

[0026] Furthermore, an air inlet channel 211 is provided at the bottom of the liquid preparation chamber, and the air inlet channel 211 is connected to the first air supply member 500. The liquid level of the prepared preformed material solution should be lower than the air outlet of the air inlet channel 211. A drainage channel 212 is provided on the outside of the air inlet channel 211. Figure 2 As shown, the drainage outlet of the drainage channel 212 is concentric with the air outlet, and a collision member 220 is arranged above the drainage outlet. The drainage channel 212, the air inlet channel 211 and the collision member 220 constitute an atomization structure. The specific atomization process and principle are as follows: the first air supply member 500 transmits a high-pressure airflow through the first conduit 110, and through the air inlet channel 211, the low-speed high-pressure airflow is converted into a low-pressure high-speed airflow due to the smaller diameter of the air outlet. When the high-speed airflow is ejected from the air outlet, a negative pressure can be generated near the drainage outlet, thereby the prefabricated solution in the liquid storage chamber 210 is The solution is brought to the drainage outlet through the drainage channel 212, and then brought to the collision member 220 by the high-speed airflow for collision, so that the prefabricated solution is crushed and dispersed into droplets of different sizes. The droplets with larger particle sizes flow back to the liquid storage chamber 210 to wait for re-atomization, and the droplets with smaller particle sizes follow the high-speed airflow to form an aerosol and spray out of the liquid storage chamber 210, so as to form the required human simulated exhalation airflow. The atomization process of the present application is mainly based on the principle of the Venturi effect, and the atomization is made more complete through a specially designed atomization structure, so as to be able to truly simulate human exhalation.

[0027] Furthermore, in this application, Figure 2As shown, an intercepting member 230 is further provided in the liquid distribution chamber. The intercepting member 230 is covered outside the collision member 220, and the end of the intercepting member 230 extends to be lower than the drainage outlet. The intercepting member 230 covers part of the space between the collision member 220 and the drainage outlet. The droplets with larger particle sizes produced by atomization flow back into the liquid distribution chamber under the interception of the intercepting member 230 to wait for re-atomization, wherein the intercepting member 230 is cylindrical, and the diameter of the end of the intercepting member 230 close to the drainage outlet is larger than that of the other end. Specifically, the intercepting member 230 is conical so as to guide the airflow. The inclined surface design with a certain angle can divert the gas, and can also avoid turbulence when the airflow collides with the collision member 220 and then collides with the intercepting member 210, so that the airflow ejected from the liquid distribution chamber is closer to real human breathing.

[0028] In some embodiments, the channel width between the air inlet and the air outlet of the air inlet channel 211 gradually decreases, that is, the air inlet channel 211 is tapered, so as to increase the speed of the air flow and generate a larger negative pressure intensity at the drainage outlet to carry out more solution.

[0029] Among them, the atomization part 200 includes a liquid preparation cup 210 having the above-mentioned liquid preparation cavity, and the liquid preparation cup 210 is columnar. Of course, it can also be other shapes. The bottom of the liquid preparation cup 210 bulges toward the top to form the above-mentioned air inlet channel 211. The top of the raised part of the bottom of the liquid preparation cup 210 is provided with an air outlet of the air inlet channel 211, which is an integrated setting. At the same time, the raised part simulates the structure of oral blowing or simulates the form of oral blowing during sampling.

[0030] Furthermore, a limiting plate is disposed around the raised portion of the bottom of the liquid preparation cup 210 to form a drainage channel 212 , and a gap is provided between the limiting plate and the bottom of the liquid preparation cup 210 so that the solution in the liquid preparation cavity can enter the drainage channel 212 .

[0031] In some embodiments, the air inlet channel 211 is connected to the first air supply component 500 through the first conduit 110. A first flow meter 111 is provided on the first conduit 110. The first flow meter 111 is used to detect the air supply flow rate, so as to facilitate the real-time calculation of the air output volume. The first air supply component 500 can be an air pump, or an air compressor or a compressed gas cylinder. Of course, the air pump plus flow meter solution can also be replaced by a fusion pump. Other devices that can generate airflow can also become the first air supply component 500 of the present application. No specific restrictions are made here.

[0032] In some embodiments, the liquid preparation cup 210 is provided with an air outlet conduit 120, the air outlet conduit 120 is fixedly connected to the air guide port 213 provided on the liquid preparation cup 210, and the air outlet conduit 120 is provided with a dilution conduit 130 for conveying gas to the air outlet conduit 120, and the dilution conduit 130 is connected with a second air supply member 600 for conveying dilution gas, and the second air supply member 600 can convey dilution gas to the air outlet conduit 120 through the dilution conduit 130 according to the required situation, so as to dilute the aerosol content in the atomized air flow in the air outlet conduit 120, so as to adjust the actual exhalation situation of exhalation in different age groups or different human body states. Specifically, the dilution conduit 130 is provided with a first solenoid valve 131 and a second flow meter 132, and the setting of the first solenoid valve 131 facilitates the dilution of the aerosol of the air outlet conduit 120 at any time according to the situation, and the first solenoid valve 131 can be a one-way solenoid valve, and the second flow meter 132 is used to monitor the actual air flow through the dilution conduit 130, so as to facilitate data collection. In addition, the types of gas flow provided by the first gas supply member 500 and the second gas supply member 600 are not limited, as long as they are inert gases that do not affect the droplet components in the aerosol, for example, they can be air flow, nitrogen flow, helium flow, etc.

[0033] When used in combination with the second air supply member 600: When a simulated breath detection operation is required for a specific group of people, a prefabricated solution containing the relevant substance to be detected is prepared in advance, and the prefabricated solution is placed in the liquid storage chamber 210 for standby. After completion, the first air supply member 500 releases a high-pressure airflow, and the airflow drives the prefabricated solution to be atomized after passing through the atomization structure, and the atomized airflow simulates the exhaled gas of the human body after drinking, taking, inhaling or injecting the substance to be detected, and then adjusts the airflow flow of the first air supply member 500 and the total air supply of the second air supply member 600 according to the required simulation situation, thereby being able to adjust the amount of aerosol per unit volume, wherein When the high-speed airflow is ejected from the air outlet, negative pressure can be generated near the drainage outlet, thereby bringing the prefabricated solution in the liquid storage chamber 210 to the drainage outlet through the drainage channel 212, and then the solution is brought to the collision member 220 by the high-speed airflow for collision, so that the prefabricated solution is crushed and dispersed into droplets of different sizes, and the droplets with larger particle sizes flow back into the liquid storage chamber 210 to wait for re-atomization, and the droplets with smaller particle sizes follow the high-speed airflow to form an aerosol and spray out of the liquid storage chamber 210, so as to form the required human simulated exhalation airflow, which is convenient for subsequent detection or for real-time and effective evaluation of research results such as sampling tools and detection devices.

[0034] The device can simulate the exhalation conditions of different groups of people by adjusting the air flow of the first air supply member 500 or replacing different types of prefabricated solutions in the liquid storage chamber 210. In addition, the second air supply member 600 can adjust the aerosol concentration in the first branch 120 after atomization by delivering dilution gas to simulate different exhalation conditions. Therefore, the device has strong applicability.

[0035] Before collecting the aerosol contained in the airflow discharged from the first branch 120 to obtain the human breath sample, it is determined whether the concentration of the aerosol in the airflow in the first branch 120 reaches a preset concentration. If it is lower than the preset concentration, the high-pressure airflow rate of the first air supply member 500 is reduced. If it is higher than the preset concentration, the second air supply member 600 is activated to add dilution gas to the first branch 120. In this way, the aerosol concentration in the airflow discharged from the first branch 120 can be adjusted better and more conveniently.

[0036] The above-mentioned device for simulating exhalation can simulate the actual exhalation conditions of people who inhale different substances or drugs to be tested, which is helpful for in-depth research on breath drug testing methods and promotes the development of breath drug testing technology. Among them, the prefabricated material solution can be prepared according to the situation, the simulated exhalation volume can be adjusted by controlling the air supply of the first air supply component 500, and the exhalation rate can also be adjusted by notifying the first air supply component 500 of the air flow speed.

[0037] In some other embodiments, in order to facilitate the real-time detection of the produced breath sample, a first shunt tube 140 and a second shunt tube can be set on the air outlet duct 120, and a first collecting part is set at the first shunt tube 140, and the first collecting part includes a condensation bottle 310, and a refrigeration device is set outside the condensation bottle 310. The airflow entering the condensation bottle 310 is cooled by the refrigeration device, so that the gaseous liquid in the airflow is condensed into a liquid state, wherein a second solenoid valve 141 and a third flow meter 142 are set on the first shunt tube 140, and the second solenoid valve 141 is a one-way solenoid valve, which can prevent the airflow from flowing back. Flow, the third flow meter 142 is used to monitor the air flow velocity and volume entering the condensation bottle 310; the second shunt tube is provided with a second collecting part 400, the second collecting part 400 includes a collecting bottle, and the collecting bottle is provided with an adsorbent 410 for adsorbing aerosols. Furthermore, the second shunt tube is also provided with a third solenoid valve 121, and the third solenoid valve 121 is a one-way solenoid valve, which is used to control the airflow to enter or prevent the airflow from entering the collecting bottle. When the adsorbent 410 collects enough aerosol, it can be taken away for detection, wherein the adsorbent 410 can be made of sponge or cloth (such as non-woven fabric).

[0038] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present application.

Claims

1. A device for simulating exhalation, characterized in that: The invention comprises a first air supply member (500) and an atomizing section (200), wherein the atomizing section (200) has a liquid distribution chamber, the liquid distribution chamber is used to place a prefabricated substance solution, an atomizing structure is arranged in the liquid distribution chamber, the first air supply member (500) is connected to the atomizing structure, and the atomizing structure atomizes the prefabricated substance solution under the action of the airflow provided by the first air supply member (500).

2. The device for simulating exhalation according to claim 1, characterized in that: An air inlet channel (211) is arranged at the bottom of the liquid preparation chamber, the liquid level of the prefabricated substance solution is lower than the air outlet of the air inlet channel (211), a drainage channel (212) is arranged outside the air inlet channel (211), a collision member (220) is arranged above the drainage outlet of the drainage channel (212), and the drainage channel (212), the air inlet channel (211) and the collision member (220) constitute the atomization structure.

3. The device for simulating exhalation according to claim 2, characterized in that: An intercepting member (230) is also provided in the liquid distribution chamber. The intercepting member (230) is disposed outside the collision member (220), and an end of the intercepting member (230) extends to a position lower than the drainage outlet.

4. The device for simulating exhalation according to claim 3, characterized in that: The intercepting member (230) is cylindrical, and the diameter of the end of the intercepting member (230) close to the drainage outlet is larger than that of the other end.

5. The device for simulating exhalation according to claim 2, characterized in that: The channel width between the air inlet and the air outlet of the air inlet channel (211) gradually decreases.

6. The device for simulating exhalation according to any one of claims 2 to 5, characterized in that: The atomizing portion (200) comprises a liquid preparation cup (210) having the liquid preparation cavity, the bottom of the liquid preparation cup (210) is raised toward the top to form the air inlet channel (211), and the air outlet is arranged at the top of the raised bottom portion of the liquid preparation cup (210).

7. The device for simulating exhalation according to claim 6, characterized in that: A layer of limiting plates is arranged around the periphery of the raised portion at the bottom of the liquid preparation cup (210) to form the drainage channel (212), and a gap is provided between the limiting plates and the bottom of the liquid preparation cup (210).

8. The device for simulating exhalation according to claim 6, characterized in that: The air inlet passage (211) is connected to the first air supply member (500) via a first conduit (110), and a first flow meter (111) is provided on the first conduit (110).

9. The device for simulating exhalation according to claim 6, characterized in that: The liquid preparation cup (210) is provided with an air outlet conduit (120), and the air outlet conduit (120) is provided with a dilution conduit (130) for conveying gas to the air outlet conduit (120).

10. The device for simulating exhalation according to claim 9, characterized in that: The dilution conduit (130) is provided with a first solenoid valve (131) and a second flow meter (132).

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