Exhaled gas collection device and exhaled gas collection system

Abstract

This disclosure relates to an exhaled gas collection device and an exhaled gas collection system. The exhaled gas collection device includes a mask, a judgment component, and a collection component. The judgment component is connected to both the inhalation and exhalation ports of the mask, and the collection component is connected to the exhalation port of the mask. The judgment component includes a carbon dioxide detection unit for detecting the carbon dioxide concentration in the exhaled gas. The collection component is used to acquire the gas entering the collection component, or to acquire a target chemical substance carried in the gas entering the collection component. The operation of the exhaled gas collection device includes a first stage and a second stage. The judgment component is connected to the mask in the first stage and disconnected from the mask in the second stage; the collection component is disconnected from the mask in the first stage and connected to the mask in the second stage. Through a phased, channel-based processing mechanism of judgment followed by collection, airflow interference between judgment and collection is avoided, balancing the accuracy of judgment and the efficiency of collection.

Description

Technical Field

[0001] This disclosure relates to the field of medical device technology, and in particular to an exhaled gas collection device and an exhaled gas collection system. Background Technology

[0002] The human circulatory system exchanges substances through the alveoli and respiratory system. The characteristic gases that are markers of human exhaled gas are concentrated in the alveoli. Therefore, by detecting human exhaled alveolar gas, the internal environment of the human body can be indirectly detected. When collecting human exhaled gas, alveolar gas should be collected first to ensure the purity of the sample and the concentration of metabolic markers, thereby ensuring the accuracy of the test.

[0003] Human exhaled gas is divided into the initial stage (containing a large amount of dead space gas in the airway), the middle stage (mainly alveolar gas), and the final stage (mixed gas). Most existing exhaled gas collection devices adopt a single-pathway design, and the collection process and gas property judgment process are carried out simultaneously. They do not accurately screen the stages of exhaled gas, which easily mixes the initial and final stage gases into the collected sample, resulting in a decrease in the proportion of alveolar gas, dilution of biomarker concentration, and ultimately affecting the reliability of the test results. Utility Model Content

[0004] In order to solve at least some of the above-mentioned technical problems, this disclosure provides an exhaled gas collection device and an exhaled gas collection system to achieve accurate screening and collection of target gas segments in human exhaled gas.

[0005] This disclosure provides an exhaled gas collection device. The exhaled gas collection device includes: a mask, a judgment component, and a collection component. The mask has an inhalation port and an exhalation port; the judgment component is connected to both the inhalation port and the exhalation port; and the collection component is connected to the exhalation port. The judgment component includes a carbon dioxide detection unit for detecting the carbon dioxide concentration of the exhaled gas. The collection component is used to acquire the gas entering the collection component, or, alternatively, to acquire a target chemical substance carried in the gas entering the collection component.

[0006] The working process of the exhaled gas collection device includes a first stage and a second stage. The judgment component is used to conduct with the mask in the first stage and disconnect from the mask in the second stage; the collection component is used to disconnect from the mask in the first stage and conduct with the mask in the second stage.

[0007] The technical solution provided in this disclosure has the following advantages compared with the prior art:

[0008] The connection between the judgment component and the mask, as well as between the collection component and the mask, can be controlled independently. Furthermore, the judgment and collection components are not simultaneously connected to the mask, achieving a phased and channel-specific processing mechanism for exhaled gas: "judgment first, collection later." Specifically, in the first stage of the exhaled gas collection device's operation, the collection component is disconnected from the mask, and no exhaled gas collection occurs. The judgment component is connected to the mask to detect the carbon dioxide concentration in the exhaled gas. In the second stage of the exhaled gas collection device's operation, the judgment component is disconnected from the mask, while the collection component is connected to the mask to collect the exhaled gas. This independent on / off control avoids airflow interference between the two components. During the judgment stage, focus can be placed on the phase identification of exhaled gas, and during the collection stage, sample collection or enrichment can be concentrated, balancing the accuracy of judgment with the efficiency of collection.

[0009] In some embodiments, the collection component includes a gas collection unit and an enrichment unit, with the inlet of the gas collection unit and the inlet of the enrichment unit respectively connected to an exhalation port. The gas collection unit is used to collect the gas entering the collection component; the enrichment unit is used to collect the target chemical substance carried in the gas entering the collection component.

[0010] In some embodiments, when the carbon dioxide concentration is less than a concentration threshold and / or the rate of change of the carbon dioxide concentration within a first preset time is greater than a first rate threshold, the operation of the exhaled gas collection device is in the first stage.

[0011] In some embodiments, when the carbon dioxide concentration is greater than or equal to a concentration threshold and / or the rate of change of the carbon dioxide concentration within a first preset time is less than a first rate threshold, the operation of the exhaled gas collection device switches to the second stage.

[0012] In some embodiments, the determining component further includes a filtering unit for adsorbing and / or filtering out at least one of particulate matter, pathogenic microorganisms, odorous substances, and water vapor carried by the gas to be inhaled.

[0013] In some embodiments, the determining component further includes a filtering unit for adsorbing and / or filtering out water vapor and / or pathogenic microorganisms carried in exhaled air.

[0014] In some embodiments, the determining component further includes a filtering unit for adsorbing and / or filtering at least one of particulate matter, pathogenic microorganisms, odorous substances, and water vapor carried by the inhaled gas, and for adsorbing and / or filtering at least one of water vapor and / or pathogenic microorganisms carried by the exhaled gas through the exhalation port.

[0015] In some embodiments, the filter media of the filter unit includes at least one of meltblown polypropylene, glass fiber, polytetrafluoroethylene microporous membrane, wool felt, cellulose fiber pad, lithium chloride impregnated material, nonwoven fabric, plastic screen, water-absorbing resin, electrostatic electret air filter material, etc.

[0016] In some embodiments, the enrichment unit includes a housing and an adsorbent material disposed within the housing, the adsorbent material being used to adsorb target chemical substances carried in the gas within the housing.

[0017] In some embodiments, the adsorbent material includes at least one of activated carbon, molecular sieve, silica gel, and polymer adsorbent resin.

[0018] In some embodiments, the carbon dioxide detection unit includes a carbon dioxide sensor.

[0019] In some embodiments, the determining component further includes a first solenoid valve, a first end of which is connected to an inhalation port and an exhalation port, and a second end of which is used to acquire inhaled gas and expel exhaled gas. A carbon dioxide detection unit is used to detect the carbon dioxide concentration of the exhaled gas discharged through the second end of the first solenoid valve.

[0020] In some embodiments, the determining component further includes a first one-way valve and a second one-way valve. The inlet of the first one-way valve is used to obtain the gas to be inhaled, and the outlet of the first one-way valve is connected to the second end of the first solenoid valve. The inlet of the second one-way valve is connected to the second end of the first solenoid valve, and the outlet of the second one-way valve is connected to the external environment.

[0021] In some embodiments, the acquisition component includes a second solenoid valve, a first end of which is connected to an exhalation port, and a second end of which is connected to a first end of an enrichment unit. The enrichment unit is used to acquire the target chemical substance carried in the gas discharged through the second end of the second solenoid valve.

[0022] In some embodiments, the acquisition component further includes a third solenoid valve, the first end of which is connected to the second end of the enrichment unit, and the gas collection unit is detachably connected to the second end of the third solenoid valve.

[0023] In some embodiments, the third end of the third solenoid valve is used to connect to an exhaled gas detection device.

[0024] In some embodiments, the acquisition component further includes a pressure detection unit, wherein the third end of the second solenoid valve and the second end of the enrichment unit are connected to the first node, and the pressure detection unit is used to detect the air pressure at the first node. The second solenoid valve is used to shut off when the second solenoid valve is turned on and the detection data of the pressure detection unit is lower than the air pressure threshold and / or the rate of change of the air pressure value detected by the pressure detection unit within a second preset time is less than a second rate threshold.

[0025] The determination component is used to connect with the mask when the second solenoid valve is turned on and the detection data of the pressure detection unit is lower than the air pressure threshold and / or the rate of change of the air pressure value detected by the pressure detection unit within a second preset time is less than the second rate threshold.

[0026] In some embodiments, the acquisition component further includes an air pump, the air pump's inlet end being connected to the first node along with the third end of the second solenoid valve and the second end of the enrichment unit, and the air pump's outlet end being connected to the second node along with the first end of the third solenoid valve. The air pump's flow rate is related to the air pressure of the first node, and the air pump's flow rate is within a preset flow rate range.

[0027] In some embodiments, the pressure detection unit includes a barometric pressure sensor.

[0028] This disclosure also provides an exhaled gas collection system. The exhaled gas collection system includes: an exhaled gas detection device, and an exhaled gas collection device as provided in any of the foregoing embodiments. The exhaled gas detection device is connected to the collection component of the exhaled gas collection device, and is used to perform direct-blowing detection on the exhaled gas through the exhalation port.

[0029] In some embodiments, the exhaled gas detection device includes at least one of an exhaled nitric oxide detector, an alcohol detector, a Helicobacter pylori detector, and a VOCs gas detection device.

[0030] The exhaled gas collection system described above has the same structure and beneficial technical effects as the exhaled gas collection device provided in some of the above embodiments, and will not be described again here. Attached Figure Description

[0031] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0032] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a structural block diagram of the exhaled gas collection device according to an embodiment of the present disclosure;

[0034] Figure 2 This is another structural block diagram of the exhaled gas collection device described in the embodiments of this disclosure;

[0035] Figure 3This is a structural block diagram of the exhaled gas collection system according to an embodiment of the present disclosure;

[0036] Figure 4 This is another structural block diagram of the exhaled gas collection system described in the embodiments of this disclosure.

[0037] Among them, 100 is the exhaled gas collection system;

[0038] 10. Exhaled gas collection device; 20. Exhaled gas detection device;

[0039] 1. Face mask; 11. Inhalation port; 12. Exhalation port;

[0040] 2. Judgment component; 21. Carbon dioxide detection unit; 22. First solenoid valve; 23. Filtration unit; 24. First check valve; 25. Second check valve;

[0041] 3. Acquisition component; 31. Gas collection unit; 32. Enrichment unit; 33. Second solenoid valve; 34. Third solenoid valve; 35. Pressure detection unit; 36. Air pump; A1. First node; A2. Second node. Detailed Implementation

[0042] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0043] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0044] Figure 1 and Figure 2 This is a structural block diagram of the exhaled gas collection device 10 described in an embodiment of this disclosure. For example... Figure 1 and Figure 2 As shown, the exhaled gas collection device 10 includes: a mask 1, a judgment component 2, and a collection component 3. The mask 1 has an inhalation port 11 and an exhalation port 12. The judgment component 2 is connected to the inhalation port 11 and the exhalation port 12 respectively, and the collection component 3 is connected to the exhalation port 12.

[0045] The judgment component 2 includes a carbon dioxide detection unit 21, which is used to detect the carbon dioxide concentration of the gas exhaled through the exhalation port 12. The acquisition component 3 is used to acquire the gas entering the acquisition component 3, or, the acquisition component 3 is used to acquire the target chemical substance carried in the gas entering the acquisition component 3.

[0046] The working process of the exhaled gas collection device 10 includes a first stage and a second stage. The judgment component 2 is used to connect with the mask 1 in the first stage and disconnect from the mask 1 in the second stage. The collection component 2 is used to disconnect from the mask 1 in the first stage and connect with the mask 1 in the second stage.

[0047] For example, the collection component 3 includes a gas collection unit 31 and an enrichment unit 32, with the inlet end of the gas collection unit 31 and the inlet end of the enrichment unit 32 respectively connected to the exhalation port 12. The gas collection unit 31 is used to collect the gas entering the collection component 3, and the enrichment unit 32 is used to collect the target chemical substance carried in the gas entering the collection component 3.

[0048] In the exhaled gas collection device 10 provided in this embodiment, the mask 1 is used to enable gas communication between the human body and the exhaled gas collection device 10. The connection and disconnection between the judgment component 2 and the mask 1, as well as between the collection component 3 and the mask 1, can be controlled independently. Moreover, the judgment component 1 and the collection component 3 are not simultaneously connected to the mask 1. In the first stage, the exhaled gas collection device 10 performs a judgment process (determining whether the currently exhaled gas is in the target segment). When it is determined that the currently exhaled gas is the target segment that needs to be collected, the exhaled gas collection device 10 switches from the first stage to the second stage. In the second stage, the collection component 3 collects the target segment of the exhaled gas (e.g., the middle segment of human exhaled gas), realizing a phased processing mechanism of "judgment first, collection later" for exhaled gas.

[0049] The exhaled gas collection process of the exhaled gas collection device 10 is as follows: The exhaled gas enters the exhaled gas collection device 10 through the exhalation port 12 of the mask 1. After entering the exhaled gas collection device 10, the exhaled gas first enters the judgment component 2. The carbon dioxide detection unit 21 in the judgment component 2 detects the carbon dioxide content in the gas. When the detection data meets the first preset condition, it means that the exhaled gas is not the gas to be collected (e.g., not alveolar gas). At this time, the collection component 3 is disconnected from the mask 1, and the exhaled gas will not be collected. The exhaled gas will be discharged from the exhaled gas collection device 10 through the judgment component 2. When the detection data meets the second preset condition, it means that the exhaled gas is the gas to be collected (e.g., alveolar gas). At this time, the collection component 3 is connected to the exhalation port 12 of the mask 1, and the judgment component 2 is disconnected from the mask 1. The exhaled gas enters the collection component 3, realizing the collection of exhaled gas.

[0050] Specifically, depending on the collection needs, the collection component 3 can collect exhaled gas through the gas collection unit 31, or it can collect target chemical substances (such as VOCs) carried in the exhaled gas through the enrichment unit 32. When detecting the collected exhaled gas, the concentration of the target chemical substances or other parameters carried in the exhaled gas can be detected. The detection and analysis results of human exhaled gas can serve as auxiliary analytical data for human health.

[0051] During the use of the exhaled gas collection device 10, before the first exhalation collection process, the human body can first inhale gas through the external environment or through the exhaled gas collection device 10, that is, complete the inhalation action first, and then exhale through the mask 1 into the exhaled gas collection device 10 to perform the exhaled gas collection action. After completing one exhaled gas collection process, the human body can inhale the gas to be inhaled through the exhaled gas collection device 10, and then repeat the above exhaled gas collection process, repeating the cycle a target number of times. The gas to be inhaled can be ambient air or oxygen from an oxygen cylinder, oxygen tube, etc., and the target number of times can be one, two, three, five, or more times, which is not limited in this disclosure.

[0052] The process by which a human body can inhale the gas to be inhaled through the exhaled gas collection device 10 is as follows: During the human body's inhalation, the collection component 3 is disconnected from the mask 1, and the judgment component 2 is connected to the mask 1. The gas to be inhaled is inhaled by the human body through the judgment component 2 and the inhalation port 11 of the mask 1.

[0053] In summary, in the technical solution provided by this disclosure, the connection and disconnection between the judgment component 2 and the mask 1, as well as between the acquisition component 3 and the mask 1, can be controlled independently. Furthermore, the judgment component 2 and the acquisition component 3 are not simultaneously connected to the mask 1, thus realizing a phased processing mechanism of "judgment first, acquisition later" for exhaled gas. The judgment component 2 monitors the concentration and rate of change of exhaled gas in real time through the carbon dioxide detection unit 21. Only when the detection data meets the second preset condition (i.e., it is determined to be alveolar gas) does it switch to the acquisition component 3 for sample acquisition. When the detection data meets the first preset condition (i.e., it is determined to be non-target gas), only the gas is discharged through the judgment component, eliminating interference from non-alveolar gas at the source.

[0054] Furthermore, this independent on / off control avoids airflow interference between the judgment component 2 and the acquisition component 3. During the judgment phase, the focus can be on gas property identification, while during the acquisition phase, sample collection or enrichment can be concentrated, balancing the accuracy of judgment with the efficiency of acquisition. Compared to using a single pathway for simultaneous gas judgment and acquisition, this avoids the problem of insufficient sample purity caused by the easy mixing of gas into the initial dead space of the airway and the mixed gas in the final stage.

[0055] In some embodiments, when the detection data of the carbon dioxide detection unit 21 meets the first preset condition, it is determined that the component 2 is connected to the mask 1 and the acquisition component 3 is disconnected from the mask 1, and the working process of the exhalation acquisition device 10 is in the first stage.

[0056] When the detection data of the carbon dioxide detection unit 21 meets the second preset condition, the judgment component 2 is connected to the mask 1 and the collection component 3 is disconnected from the mask 1, and the working process of the exhalation collection device 10 switches to the second stage.

[0057] In some embodiments, when the carbon dioxide concentration is less than a concentration threshold and / or the rate of change of the carbon dioxide concentration within a first preset time is greater than a first rate threshold, the operation of the exhaled gas collection device 10 is in the first stage.

[0058] When the carbon dioxide concentration is greater than or equal to a concentration threshold and / or the rate of change of the carbon dioxide concentration within a first preset time is less than a first rate threshold, the operation of the exhaled gas collection device 10 switches to the second stage.

[0059] The carbon dioxide concentration is obtained through the carbon dioxide detection unit 21, for example, the detection data of the carbon dioxide detection unit 21. After obtaining the carbon dioxide concentration detection data of the current exhaled gas, the detected concentration can be compared with a preset concentration threshold to determine whether the current exhaled gas is the target segment gas (e.g., alveolar gas) to be collected.

[0060] The rate of change of carbon dioxide concentration within a first preset time period is obtained based on the detection data of carbon dioxide detection unit 21 within the first preset time period. For example, the rate of change of carbon dioxide concentration is generated based on the detection data of carbon dioxide detection unit 21 within the first preset time period. After obtaining the actual rate of change, the actual rate of change can be compared with a preset rate threshold to determine whether the currently exhaled gas is the target segment of gas (e.g., alveolar gas) to be collected.

[0061] The first and second stages of the working process of the exhaled gas collection device 10 can be switched based on the judgment result of the judgment component 2. For example, when the detection data of the carbon dioxide detection unit 21 meets the first preset condition, the working process of the exhaled gas collection device 10 is in the first stage; when the detection data of the carbon dioxide detection unit 21 meets the second preset condition, the working process of the exhaled gas collection device 10 switches to the second stage.

[0062] The working process of the exhaled gas collection device 10 may include at least one first stage and at least one second stage.

[0063] For example, the working process of the exhaled gas collection device 10 may include a first stage and a second stage performed sequentially. In the first stage, the initial segment of human exhaled gas (containing a large amount of dead space gas in the airway) is discharged through the judgment component 2. In the second stage, the middle segment of human exhaled gas (mainly alveolar gas) is collected through the collection component 3. The final segment of human exhaled gas (mixed gas) is also collected in the second stage, or discharged outside the mask 1 after the second stage is completed.

[0064] The exhaled gas collection device 10 may also include a detection component, which detects whether the mask 1 covers the human face. When the mask 1 does not cover the human face, the judgment component 2 is connected to the mask 1 and the collection component 3 is disconnected from the mask 1. When the mask 1 covers the human face, the human exhales through the mask 1. In the first stage, the initial segment of the human exhaled gas (containing a large amount of dead space gas in the airway) enters the judgment component 2. The judgment component 2 analyzes the exhaled gas. When it determines that the exhaled gas is the target segment gas (mainly alveolar gas), it switches to the second stage. At this time, the judgment component 2 is disconnected from the mask 1, and the collection component 3 is connected to the mask 1 to collect the target segment of exhaled gas. When the human body separates from the mask 1, the judgment component 2 switches from disconnected to connected with the mask 1, and the collection component 3 switches from connected to disconnected with the mask 1. The final segment of the human exhaled gas (mixed gas) is discharged outside the mask 1.

[0065] For example, the working process of the exhaled gas collection device 10 may include a first stage, a second stage, and a third stage performed sequentially. The initial segment of human exhaled gas is discharged through the judgment component 2 in the first stage, the middle segment of human exhaled gas is collected through the collection component 3 in the second stage, and the final segment of human exhaled gas is discharged through the judgment component 2 in the second stage.

[0066] The first preset condition includes at least one of the following: the carbon dioxide concentration is less than a concentration threshold, or the rate of change of the carbon dioxide concentration within a first preset time period is greater than a first rate threshold. The second preset condition includes at least one of the following: the carbon dioxide concentration is greater than or equal to a concentration threshold, or the rate of change of the carbon dioxide concentration within a first preset time period is less than a first rate threshold.

[0067] Human exhaled air contains carbon dioxide at different times, but the concentration of carbon dioxide in the exhaled air changes gradually during a single exhalation. Therefore, by comparing the concentration of carbon dioxide carried in the exhaled air at the current time point with a set concentration threshold, or by comparing the rate of change of the concentration of carbon dioxide carried in the exhaled air with a set rate, it is possible to help analyze and determine whether the exhaled air at the current time point is the gas that needs to be collected.

[0068] For example, when the judgment component 2 detects that the carbon dioxide concentration of the human exhaled air does not reach the required concentration value for alveolar gas, the acquisition component 3 remains disconnected from the mask 1 to avoid acquiring exhaled gas other than alveolar gas. The judgment component 2 remains connected to the exhalation port 12 of the mask 1, and the part of the exhaled air that does not need to be acquired is discharged through the judgment component 2. When the carbon dioxide concentration of the human exhaled air reaches the required concentration value for alveolar gas, the judgment component 2 is disconnected from the mask 1 and the acquisition component 3 is connected to the exhalation port 12 of the mask 1, thereby acquiring the exhaled alveolar gas.

[0069] The judgment component monitors the carbon dioxide concentration and / or rate of change of exhaled gas in real time through the carbon dioxide detection unit. Only when the detection data from the carbon dioxide detection unit meets preset conditions (i.e., it is determined to be alveolar gas) will the acquisition component be switched on for sample collection. If the detection data from the carbon dioxide detection unit does not meet the preset conditions (i.e., it is determined to be non-target gas), only the judgment component expels gas, eliminating interference from non-alveolar gases at the source. Furthermore, this independent on / off control avoids airflow interference between the two components. During the judgment phase, the focus can be on the stage identification of exhaled gas, and during the acquisition phase, sample collection can be concentrated, balancing the accuracy of judgment with the efficiency of collection.

[0070] In some embodiments, such as Figure 2 As shown, the carbon dioxide detection unit 21 includes a carbon dioxide sensor.

[0071] In conjunction with the foregoing embodiments, under the first preset condition that the carbon dioxide concentration is less than the concentration threshold and the second preset condition that the carbon dioxide concentration is greater than or equal to the concentration threshold, the carbon dioxide detection unit 21 may consist of only a carbon dioxide sensor, which outputs detection data on the carbon dioxide concentration in exhaled gas to control the connection and disconnection between the acquisition component 3 and the mask 1.

[0072] In other embodiments, the carbon dioxide detection unit 21 further includes a controller for acquiring detection data from the carbon dioxide sensor. The controller is also used to determine the rate of change of carbon dioxide concentration based on the acquired detection data.

[0073] In conjunction with the foregoing embodiments, under the first preset condition, the rate of change of carbon dioxide concentration within a first preset time is greater than a first rate threshold, and under the second preset condition, the rate of change of carbon dioxide concentration within a first preset time is less than the first rate threshold, the carbon dioxide detection unit 21 may further include a controller. The controller acquires the detection data from the carbon dioxide sensor and obtains the rate of change of carbon dioxide concentration carried by exhaled gas through the detection data. This allows the carbon dioxide detection unit 21 to provide both the carbon dioxide concentration carried by exhaled gas and the rate of change of carbon dioxide concentration carried by exhaled gas, thereby improving the accuracy of judgment and more accurately collecting alveolar gas in exhaled gas.

[0074] In some embodiments, such as Figure 2 As shown, the judgment component 2 also includes a first solenoid valve 22. The first end of the first solenoid valve 22 is connected to the inhalation port 11 and the exhalation port 12, and the second end of the first solenoid valve 22 is used to acquire the inhaled gas and expel the exhaled gas. The carbon dioxide detection unit 21 is used to detect the carbon dioxide concentration of the exhaled gas discharged through the second end of the first solenoid valve 22.

[0075] For example, the first solenoid valve 22 can be a two-position two-way solenoid valve. As described above, the other end of the two-position two-way solenoid valve can be connected to the external environment, allowing direct intake of air from the external environment during inhalation; or the other end of the two-position two-way solenoid valve can be connected to an oxygen cylinder or oxygen tubing, etc. The specific configuration can be tailored to actual needs, and this disclosure does not impose any limitations on it.

[0076] In some embodiments, such as Figure 2 As shown, the acquisition component 3 also includes a second solenoid valve 33. The first end of the second solenoid valve 33 is connected to the exhalation port 12, and the second end of the second solenoid valve 33 is connected to the first end of the enrichment unit 32. The enrichment unit 32 is used to acquire the target chemical substance carried in the gas discharged through the second end of the second solenoid valve 33.

[0077] The target chemical substance can be volatile organic compounds (VOCs). VOCs are compounds that originate from human metabolic processes and mainly include alkanes, enols, aldehydes, and ketones. By detecting and analyzing VOCs in human exhaled breath, we can provide auxiliary analysis of human health.

[0078] For example, such as Figure 2 As shown, the second solenoid valve 33 can be a three-position four-way solenoid valve; the third solenoid valve 34 can also be a two-position three-way solenoid valve.

[0079] In some embodiments, such as Figure 2As shown, the enrichment unit 32 includes a shell and an adsorbent material disposed inside the shell. The adsorbent material is used to adsorb the target chemical substance carried in the gas inside the shell.

[0080] For example, the enrichment unit 32 can be an adsorption tube, which can capture trace amounts of VOCs (such as benzene, pentane, etc., which can be adapted according to actual needs, and this disclosure does not limit this). Specifically, the shell can be tubular, cylindrical, or other shapes, and this disclosure does not limit this.

[0081] For example, enrichment unit 32 can be a solid-phase microextraction (SPME) enrichment module.

[0082] For example, the adsorbent material includes at least one of activated carbon, molecular sieve, silica gel, and polymer adsorbent resin.

[0083] Activated carbon has a large adsorption capacity, is resistant to acids and alkalis, and is inexpensive, but its adsorption effect on small molecule VOCs (such as formaldehyde) is poor. Silica gel is a porous material that can achieve gas separation and enrichment. Polymer adsorption resins have high porosity and high cross-linking degree, and stable adsorption performance for organic pollutants.

[0084] Molecular sieves are synthetic zeolites with a uniform microporous structure. Their pore size is comparable to that of molecules, allowing for selective adsorption based on molecule size and polarity. Desorption is then achieved through methods such as heating, and the adsorbed molecules are fed into analytical instruments, improving detection sensitivity. Molecular sieves offer adjustable pore sizes, selective adsorption of specific VOC molecules, good thermal stability, easy regeneration, and the ability to remove water vapor from exhaled breath, avoiding moisture interference. Therefore, it is crucial to select the appropriate molecular sieve type based on the properties of the target analyte to prevent adsorption of molecules of the target chemical substance.

[0085] In some embodiments, such as Figure 2 As shown, the acquisition component 3 also includes a third solenoid valve 34. The first end of the third solenoid valve 34 is connected to the second end of the enrichment unit 32, and the gas collection unit 31 is detachably connected to the second end of the third solenoid valve 34.

[0086] The gas collection unit 31 is used to collect the gas discharged through the second end of the third solenoid valve 34. The gas collection unit 31 includes, but is not limited to, the gas bag. Any gas collection unit that can achieve a similar effect is acceptable. The specific unit can be selected according to actual needs. This disclosure does not limit the specific unit.

[0087] Exhaled alveolar gas can be discharged into the air bag through the second solenoid valve 33 and the third solenoid valve 34 to achieve non-enriched gas collection or direct blowing detection of non-enriched gas.

[0088] Exhaled alveolar gas can first pass through the second solenoid valve 33 to the enrichment unit 32 for enrichment and collection, and excess gas is then discharged through the third solenoid valve 34. By detecting the target chemical substances collected by the enrichment unit 32, the enrichment detection of human exhaled gas can be achieved.

[0089] In some embodiments, such as Figure 1 As shown, the acquisition component 3 also includes a pressure detection unit 35. The third end of the second solenoid valve 33 and the second end of the enrichment unit 32 are connected to the first node A1. The pressure detection unit 35 is used to detect the air pressure of the first node A1.

[0090] When the second solenoid valve 33 is turned on and the detection data of the pressure detection unit 35 meets the third preset condition, the second solenoid valve 33 is turned off and the judgment component 2 is connected to the mask 1.

[0091] The second solenoid valve 33 is used to shut off when the second solenoid valve 33 is turned on and the detection data of the pressure detection unit is lower than the air pressure threshold and / or the rate of change of the air pressure value detected by the pressure detection unit within a second preset time is less than the second rate threshold.

[0092] The determination component is used to connect with the mask 1 when the second solenoid valve 33 is turned on and the detection data of the pressure detection unit 35 is lower than the air pressure threshold and / or the rate of change of the air pressure value detected by the pressure detection unit 35 within a second preset time is less than the second rate threshold.

[0093] When the second solenoid valve 33 is turned on and the pressure detection unit 35 detects the above conditions, it indicates that the exhaled gas has entered the final stage. The acquisition component 3 is disconnected from the mask 1, and the final stage of exhaled gas is not acquired. At the same time, the judgment component 2 is reconnected to the mask 1, and the final stage of the user's exhaled gas is discharged through the judgment component 2.

[0094] In conjunction with the above, after completing one exhalation collection process, the inhalation process can also be completed through the judgment component 2. The human body first inhales gas and then continues the exhalation collection process.

[0095] When the pressure detection unit 35 detects an abnormal air pressure (determined to be terminal gas), the acquisition component 3 can promptly shut down and restart the judgment component 2, further ensuring that the collected sample is high-purity alveolar gas and significantly improving the accuracy of subsequent detection.

[0096] For example, the third end of the second solenoid valve 33 is connected to the second end of the enrichment unit 32.

[0097] For example, in the second stage, if the detection data of the pressure detection unit 35 meets the third preset condition, the operation of the exhaled gas collection device 10 is switched from the second stage to the first stage, and the second solenoid valve 33 and the judgment component 2 perform on / off actions in response to the detection data of the pressure detection unit 35 meeting the third preset condition.

[0098] The third preset condition includes at least one of the following: the air pressure value detected by the pressure detection unit 35 is lower than the air pressure threshold, or the rate of change of the air pressure value detected by the pressure detection unit 35 within a second preset time period is less than the second rate threshold.

[0099] When the second solenoid valve 33 is turned on and the detection data of the pressure detection unit 35 meets the third preset condition, it indicates that the exhaled gas has entered the final stage. The acquisition component 3 is disconnected from the mask 1 and the final stage of exhaled gas is not acquired. At the same time, the judgment component 2 is turned on again from the mask 1, and the final stage of the user's exhaled gas is discharged through the judgment component 2.

[0100] In conjunction with the above, after completing one exhalation collection process, the inhalation process can also be completed through the judgment component 2. The human body first inhales gas and then continues the exhalation collection process.

[0101] When the pressure detection unit 35 detects an abnormal air pressure (determined to be terminal gas), the acquisition component 3 can promptly shut down and restart the judgment component 2, further ensuring that the collected sample is high-purity alveolar gas and significantly improving the accuracy of subsequent detection.

[0102] In some embodiments, the pressure detection unit 35 includes a pressure sensor.

[0103] The pressure sensor detects the air pressure transmitted to the first end (first node A1) of the third solenoid valve 34. When the pressure sensor detects that the air pressure is less than the pressure threshold, it indicates that the exhaled air has entered the final stage, and the acquisition component 3 closes, not acquiring the final stage of exhaled air. At the same time, the judgment component 2 can reopen based on the detection data of the pressure sensor, and the final stage of the user's exhaled air is discharged through the judgment component 2. Then, after exhalation is completed, the inhalation process can be completed through the judgment component 2, and then the exhalation process can continue.

[0104] If the pressure value detected by the pressure detection unit 35 is lower than the pressure threshold under the third preset condition, the pressure detection unit 35 may consist of only a pressure sensor. In this case, the pressure detection unit 35 can only provide pressure data for exhaled gas.

[0105] In other embodiments, the pressure detection unit 35 further includes a controller for acquiring detection data from the pressure sensor and obtaining the rate of pressure change based on the acquired pressure data.

[0106] If, under the third preset condition, the rate of change of the air pressure value detected by the pressure detection unit 35 within a second preset time period is less than a second rate threshold, the controller acquires the detection data from the air pressure sensor and obtains the air pressure change rate based on the detection data. In this case, the pressure detection unit 35 can provide both the air pressure data of exhaled gas and the air pressure change rate of exhaled gas.

[0107] In accordance with the foregoing, when both the carbon dioxide detection unit 21 and the pressure detection unit 35 include controllers, the controller included in the carbon dioxide detection unit 21 and the controller included in the pressure detection unit 35 can be the same controller, thereby saving the number of controllers and reducing manufacturing costs; alternatively, the controller included in the carbon dioxide detection unit 21 and the controller included in the pressure detection unit 35 can also be two separate controllers, each analyzing and judging the detection data from different sensors independently. Therefore, compared to sharing the same controller between the carbon dioxide detection unit 21 and the pressure detection unit 35, the requirements for the controller are lower, and data confusion can be avoided when the controller processes the sensor detection data, improving the accuracy of the sensor detection data and the rate of change obtained based on the detection data.

[0108] In some embodiments, such as Figure 2 As shown, the acquisition component 3 also includes an air pump 36. The air inlet of the air pump 36, the third end of the second solenoid valve 33, and the second end of the enrichment unit 32 are all connected to the first node A1. The air outlet of the air pump 36 and the first end of the third solenoid valve 34 are all connected to the second node A2. The flow rate of the air pump 36 is related to the air pressure of the first node A1, and the flow rate of the air pump 36 is within a preset flow rate range.

[0109] For those with low lung capacity, coma, or other conditions that result in insufficient exhaled air, when the air pressure sensor detects that the exhaled air pressure is lower than the set value, the air pump 36 is activated to assist exhalation, thereby making the application scenarios of the exhaled air collection device 10 more extensive.

[0110] In some embodiments, such as Figure 1 As shown, the judgment component 2 also includes a filter unit 23, which is used to adsorb and / or filter out at least one of the particulate matter, pathogenic microorganisms, odor substances and water vapor carried by the gas to be inhaled.

[0111] In other embodiments, such as Figure 1 As shown, the judgment component 2 also includes a filter unit 23, which is used to adsorb and / or filter out water vapor and / or pathogenic microorganisms carried by exhaled gas.

[0112] In some other embodiments, such as Figure 1As shown, the judgment component 2 further includes a filter unit 23, which is used to adsorb and / or filter out at least one of the particulate matter, pathogenic microorganisms, odor substances and water vapor carried by the gas to be inhaled, and to adsorb and / or filter out at least one of the water vapor and / or pathogenic microorganisms carried by the gas exhaled through the exhalation port 12.

[0113] In conjunction with the above embodiments, such as Figure 2 As shown, the filter unit 23 can be a filter or the like.

[0114] For example, the filter media of the filter unit 23 includes at least one of meltblown polypropylene, glass fiber, polytetrafluoroethylene microporous membrane, wool felt, cellulose fiber pad, lithium chloride impregnated material, non-woven fabric, filter cotton, plastic screen, water-absorbing resin, electrostatic electret air filter material, etc.

[0115] In some embodiments, such as Figure 2 As shown, the judgment component 2 also includes a first one-way valve 24 and a second one-way valve 25. The inlet end of the first one-way valve 24 is used to obtain the gas to be inhaled, and the outlet end of the first one-way valve 24 is connected to the second end of the first solenoid valve 22. The inlet end of the second one-way valve 25 is connected to the second end of the first solenoid valve 22, and the outlet end of the second one-way valve 25 is connected to the external environment.

[0116] By setting a one-way valve, it can be ensured that both inhaled and exhaled gases can flow along a preset path.

[0117] In some embodiments, such as Figure 2 As shown, the third end of the third solenoid valve 34 is used to connect to the exhaled gas detection device 20.

[0118] For example, the third solenoid valve 34 can be a two-position three-way valve, and one exhaust port of the two-position three-way valve can be connected to the detection machine to realize the direct blow detection of exhaled gas.

[0119] This disclosure also provides an exhaled gas collection system 100.

[0120] In some embodiments, such as Figure 3 and Figure 4 As shown, the exhaled gas collection system 100 includes an exhaled gas collection device 10 and an exhaled gas detection device 20. The exhaled gas detection device 20 is connected to the collection component 3 of the exhaled gas collection device 10 and is used to perform direct blowing detection on the gas exhaled through the exhalation port 12.

[0121] The exhaled gas collection system 100 has the same technical features and beneficial effects as the exhaled gas collection device 10 described above, and will not be repeated here.

[0122] In some embodiments, such as Figure 3 and Figure 4 As shown, the exhaled gas detection device 20 includes at least one of an exhaled nitric oxide detector, an alcohol detector, a Helicobacter pylori detector, and a VOCs gas detection device.

[0123] As mentioned above, the human exhalation state is divided into multiple stages. The exhalation gas device 10 can be configured according to the collection needs to achieve the collection or direct detection of exhaled gas in the intermediate stage. At the same time, the collection of exhaled gas in the intermediate stage includes two different collection methods: non-enrichment collection and enrichment collection.

[0124] Specifically, in the breath collection device 10, the first solenoid valve 22 can be opened by default. After starting to work, the first solenoid valve 22 is controlled to close (not conducting in any direction) according to the detection value of the carbon dioxide sensor, and then the first solenoid valve 22 is controlled to open (the first end and the second end of the first solenoid valve 22 are connected) according to the detection value of the air pressure sensor.

[0125] The second solenoid valve 33 is closed by default (not conducting in any direction), and then the second solenoid valve 33 is opened according to the detection value of the carbon dioxide sensor (the first and second ends of the second solenoid valve 33 are connected, or the first and third ends of the second solenoid valve 33 are connected).

[0126] The third solenoid valve 34 can be closed by default and opened simultaneously with the second solenoid valve 33.

[0127] Alternatively, the third solenoid valve 34 can be closed by default, and then opened based on the detection data of the air pressure sensor after the second solenoid valve 33 is opened.

[0128] Alternatively, the third solenoid valve 34 can be configured to have the first and second ends open by default. During the exhalation sampling process, if the detection data of the carbon dioxide sensor does not meet the second preset condition, the second solenoid valve 33 is closed, the air pump 36 is started, the gas in the pipeline between the first solenoid valve 22 and the second solenoid valve 25 is discharged, a vacuum (or near vacuum) is drawn, and then the valve is closed to avoid residual gas in the pipeline affecting the accuracy of exhalation sampling.

[0129] Based on this, if it is a non-enrichment collection, the third solenoid valve 34 can be continuously open at both the first and second ends during the collection process, and the exhaled gas is discharged into the air bag 31 through the second solenoid valve 25 and the third solenoid valve 34 in sequence.

[0130] During this process, for people with low lung capacity, the air pump 36 can be activated based on the detection values ​​of other sensors to assist in the expulsion of gas.

[0131] If it is enrichment collection, during the exhalation collection process, the third solenoid valve 34 can be continuously open at both the first and second ends. The exhaled gas is discharged to the external environment or the gas bag 31 through the second solenoid valve 25, the enrichment unit 32 and the third solenoid valve 34 in sequence. During the process of the exhaled gas flowing through the enrichment unit 32, the enrichment unit 32 acquires (collects / adsorbs) the target components carried in the gas.

[0132] Alternatively, during the exhalation collection process, the first and second ends of the third solenoid valve 34 can be periodically connected (the period length can be set as needed). Since the gas flow between the second solenoid valve 25 and the third solenoid valve 34 can only be unidirectional (exhalation port 12 of mask 1 → second one-way valve 25 → third one-way valve 34 → external environment / air bag 21), when the third solenoid valve 34 is closed, the gas in the pipeline between the second solenoid valve 25 and the third solenoid valve 34 can be collected by the enrichment device for a longer period of time to obtain the target component. By setting an appropriate period, the effect of the enrichment unit 32 in obtaining the target component in the exhaled gas can be improved, and excess gas can be discharged in time to avoid excessive pressure in the pipeline causing other problems.

[0133] The exhaled gas collection system 100 provided in this disclosure can adsorb markers such as VOCs and nitric oxide in exhaled gas through the enrichment unit 32. Combined with equipment such as an exhaled nitric oxide detector and a VOCs gas detection device, it can assist in the diagnosis of diseases such as asthma, chronic obstructive pulmonary disease (COPD), and pneumonia.

[0134] For example, detecting exhaled nitric oxide concentration can assess the degree of airway inflammation, and capturing specific VOCs (such as benzene and pentane) can aid in early lung injury screening. The precise screening of alveolar gases by the judgment component can avoid interference from dead space gases in the airways, improving the reliability of diagnostic data.

[0135] For digestive system diseases such as Helicobacter pylori infection, the exhaled gas collection system 100 can directly collect alveolar gas through the gas collection unit 31, or concentrate the target markers through the enrichment unit 32 before connecting to a Helicobacter pylori detector for detection. The accurate capture of Helicobacter pylori metabolites in alveolar gas provides high-quality sample support for non-invasive detection.

[0136] By collecting metabolic markers (such as acetone and fatty acid derivatives) from alveolar gases, and combining this with a detection device, the device can assist in the monitoring of metabolic diseases such as diabetes and obesity. The device is suitable for elderly patients or those with low lung capacity or frailty. The pressure detection unit 35 triggers an air pump to assist exhalation, ensuring sufficient sample volume for these individuals and meeting their long-term health monitoring needs.

[0137] In scenarios such as traffic enforcement and workplace safety, the exhaled breath collection system 100 can be directly connected to an alcohol detector (exhaled breath detection device 20) via the "direct blow detection mode". The third solenoid valve 34 switches to connect with the alcohol detector, and the judgment component 2 filters out alveolar gas and sends it directly to the alcohol detector to obtain alcohol concentration data. The high purity of alveolar gas can avoid false judgments caused by residual alcohol in the mouth.

[0138] In hospital emergency rooms and inpatient wards, the exhaled gas collection system 100 can quickly collect alveolar gases from comatose or unconscious patients. The mask 1 can be adapted to patients in different positions, and the filter unit 23 filters out pathogens and moisture from the exhaled gas, avoiding contamination of the detection equipment. At the same time, the air pump 36 assists in the collection, solving the problem of insufficient spontaneous exhalation power of patients and providing immediate samples for emergency diagnosis.

[0139] In medical research, the exhaled gas collection system 100's dual-mode "enrichment collection + non-enrichment collection" can meet different needs. For trace biomarkers (such as low-concentration VOCs), the enrichment unit 32 enhances detection sensitivity; for high-concentration biomarkers (such as carbon dioxide-derived metabolites), the collection unit 31 directly collects them. By changing the adsorbent material or the collection unit 32, it can be adapted to the separation and analysis of various biomarkers.

[0140] During outbreaks of respiratory infectious diseases such as influenza and COVID-19, the exhaled gas collection system 100 can collect alveolar gases from a large number of people. The filter unit 23 can filter out pathogenic microorganisms in the exhaled gas, reducing the exposure risk of sampling personnel. At the same time, the judgment component 2 accurately collects alveolar gases and, combined with nucleic acid testing or antigen testing devices, assists in the rapid screening of infected persons. It is suitable for large-scale screening scenarios such as communities and airports.

[0141] In response to the characteristics of decreased lung capacity in the elderly and unstable exhalation in children, the exhaled gas collection system 100 uses the pressure detection unit 35 to determine the exhalation stage in real time, and the air pump 36 dynamically adjusts the airflow to assist in collection and ensure sample quality. The mask 1 can be made of flexible material. Through the soft and fit design of the mask 1, it can adapt to the facial contours of people of different ages and can be used in scenarios such as long-term follow-up of childhood asthma and monitoring of lung function decline in the elderly.

[0142] For occupational groups who are exposed to dust and chemical toxins (such as formaldehyde and benzene compounds) for a long time, the exhaled gas collection system 100 can periodically collect their alveolar gas. The molecular sieve and polymer adsorption resin in the enrichment unit 32 can specifically capture occupational exposure-related markers. Combined with the exhaled gas detection device 20, it can realize early warning of lung injury and provide data support for occupational health protection.

[0143] The exhaled gas collection system 100 disclosed herein integrates three core collection modes: enrichment collection of target chemical substances through the adsorption material of the enrichment unit 32 (suitable for trace biomarker detection); direct collection without enrichment through the gas collection unit 31 (suitable for high-concentration biomarker detection); and direct-blowing detection through connection to the exhaled gas detection device 20 via the third solenoid valve 34 (suitable for point-of-care testing). The three modes can be flexibly switched via the solenoid valve, meeting diverse clinical testing needs without requiring equipment replacement.

[0144] The bidirectional filtration design of the filter unit 23 can provide clean gas for the inhalation process, avoiding the impact of external pollutants on the human body, and can also filter out impurities such as water vapor and pathogenic microorganisms in the exhaled air, preventing pipeline contamination and equipment damage, and extending the service life of the device.

[0145] The air pump 36 in the collection component 3 can dynamically adjust the flow rate according to the feedback from the pressure detection unit 35. When the air pressure is detected to be too low (such as insufficient expiratory power in patients with low vital capacity), the air pump will automatically start to assist airflow delivery and ensure sufficient sample volume. Before collection, the air pump can pre-explode residual gas in the pipeline to make the pipeline close to a vacuum state and avoid cross-contamination.

[0146] The one-way valve design ensures that the inhalation and exhalation processes do not interfere with each other, and the judgment component 2 remains open during the inhalation phase, ensuring smooth breathing, improving patient comfort, and making it suitable for people in different states such as conscious and comatose.

[0147] The exhaled gas collection system 100 achieves an integrated "collection-detection" process through seamless connection between the exhaled gas collection device 10 and the exhaled gas detection device 20. The alveolar gas accurately screened by the exhaled gas collection device 10 can be directly sent to the exhaled gas detection device 20 for analysis, reducing loss and contamination during sample transfer and improving the response speed of detection results.

[0148] The components of the exhaled gas collection system 100 are controlled by the linkage of solenoid valves and sensors, achieving fully automated operation without manual intervention, reducing operational difficulty and improving the efficiency of clinical testing. It should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0149] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An exhaled breath collection device, comprising: include: The mask has an inhalation port and an exhalation port; A judgment component is connected to both the inhalation port and the exhalation port; the judgment component includes a carbon dioxide detection unit, which is used to detect the carbon dioxide concentration of the gas exhaled through the exhalation port; A collection component is connected to the exhalation port; the collection component is used to acquire gas entering the collection component, or the collection component is used to acquire target chemical substances carried in the gas entering the collection component. The working process of the exhaled gas collection device includes a first stage and a second stage. The judgment component is used to be in contact with the mask in the first stage and disconnected from the mask in the second stage. The collection component is used to be disconnected from the mask in the first stage and in contact with the mask in the second stage.

2. The exhaled gas collection device of claim 1, wherein, When the carbon dioxide concentration is less than a concentration threshold and / or the rate of change of the carbon dioxide concentration within a first preset time is greater than a first rate threshold, the operation of the exhaled gas collection device is in the first stage. When the carbon dioxide concentration is greater than or equal to the concentration threshold and / or the rate of change of the carbon dioxide concentration within the first preset time is less than the first rate threshold, the operation of the exhaled gas collection device switches to the second stage.

3. The exhaled gas collection device of claim 1, wherein, The collection component includes a gas collection unit and an enrichment unit. The inlet of the gas collection unit and the inlet of the enrichment unit are respectively connected to the exhalation port. The gas collection unit is used to collect the gas entering the collection component. The enrichment unit is used to collect the target chemical substance carried in the gas entering the collection component.

4. The exhaled gas collection device of claim 3, wherein, The enrichment unit includes a housing and an adsorbent material disposed within the housing, the adsorbent material being used to adsorb the target chemical substance carried in the gas within the housing.

5. The exhaled gas collection device of claim 1, wherein, The carbon dioxide detection unit includes a carbon dioxide sensor.

6. The exhaled gas collection device of claim 1, wherein, The judgment component further includes: a first solenoid valve; The first end of the first solenoid valve is connected to the inhalation port and the exhalation port, and the second end of the first solenoid valve is used to acquire the gas to be inhaled and to expel the exhaled gas; the carbon dioxide detection unit is used to detect the carbon dioxide concentration of the exhaled gas discharged through the second end of the first solenoid valve.

7. The exhaled gas collection device of claim 1, wherein, The acquisition component also includes: a second solenoid valve; The first end of the second solenoid valve is connected to the exhalation port, and the second end of the second solenoid valve is connected to the first end of the enrichment unit of the acquisition component. The enrichment unit is used to obtain the target chemical substance carried in the gas discharged through the second end of the second solenoid valve.

8. The exhaled gas collection device of claim 7, wherein, The acquisition component also includes: a third solenoid valve; The first end of the third solenoid valve is connected to the second end of the enrichment unit, and the second end of the third solenoid valve is detachably connected to the gas collection unit of the collection component.

9. The exhaled gas collection device of claim 7, wherein, The acquisition component also includes: a pressure detection unit; The third end of the second solenoid valve and the second end of the enrichment unit are connected to the first node, and the pressure detection unit is used to detect the air pressure of the first node; The second solenoid valve is used to shut off when the second solenoid valve is turned on and the detection data of the pressure detection unit is lower than the air pressure threshold and / or the rate of change of the air pressure value detected by the pressure detection unit within a second preset time is less than a second rate threshold. The judgment component is used to connect with the mask when the second solenoid valve is turned on and the detection data of the pressure detection unit is lower than the air pressure threshold and / or the rate of change of the air pressure value detected by the pressure detection unit within a second preset time is less than a second rate threshold.

10. An exhaled breath collection system, characterized in that, include: Exhaled gas detection device; and, The exhaled gas collection device as described in any one of claims 1 to 9; The exhaled gas detection device is connected to the collection component of the exhaled gas collection device; the exhaled gas detection device is used to perform direct blowing detection on the gas exhaled through the exhalation port.

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