CN214096808U - Gas collection device - Google Patents

Abstract

A gas collecting device comprises a collecting mechanism, a first valve, a second valve and a collecting mechanism which are sequentially communicated, wherein a first filter is arranged in the collecting mechanism and used for filtering carbon monoxide in air, and the second valve further comprises an external outlet which is communicated with the outside air; a first sensor and a second sensor are respectively arranged between the acquisition mechanism and the first valve and are used for respectively acquiring a gas pressure signal of the gas and a concentration signal of carbon dioxide in the gas; the controller is used for controlling the opening and closing of the first valve according to a gas pressure signal of the gas measured by the first sensor and controlling the switching of the second valve between an outlet connected with the collecting mechanism and an external outlet according to a concentration signal of carbon dioxide in the gas measured by the second sensor. This gaseous collection system can effectively gather sample gas, is showing improvement suitability and convenience.

Description

Gas collection device

Technical Field

The utility model relates to a gaseous collection technical field particularly, relates to a gaseous collection system.

Background

The CO breath test measures red blood cell life (RBCS) by measuring the endogenous CO concentration. The method for determining RBCS by CO breath test has the advantages of high accuracy, short time consumption (about 1/30 of a labeling method), no wound and the like, brings a new breakthrough for RBCS determination, is the only RBCS determination item which can be routinely developed clinically, can rapidly reflect the illness state of a patient, and has important clinical significance for the research of disease physiology and pathology and clinical diagnosis.

Because the patient is required to hold breath for a certain time in the sampling process, the gas generated by the gastrointestinal tract enters the alveolus and reaches the balance, and then the sampling device is used for sampling the expired gas, the existing sampling device needs to perform artificially-controlled expiration under the guidance of an operator, and the problem that the sample gas cannot be effectively collected for testers who lack cognition or are unsmooth in communication exists.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a gas collection system can effectively gather sample gas, is showing improvement suitability and convenience.

The embodiment of the utility model is realized like this:

the embodiment of the utility model provides a gas collecting device, including collection mechanism, first valve, second valve and the collection mechanism that communicates in proper order, be provided with first filter in the collection mechanism, first filter is used for filtering the carbon monoxide in the air, the second valve still includes an external outlet, the external outlet communicates with outside air; a first sensor and a second sensor are respectively arranged between the acquisition mechanism and the first valve and are used for respectively acquiring a gas pressure signal of the gas and a concentration signal of carbon dioxide in the gas; the gas pressure sensor is characterized by further comprising a controller which is electrically connected with the first valve, the second valve, the first sensor and the second sensor respectively, wherein the controller is used for controlling the opening and closing of the first valve according to a gas pressure signal of gas measured by the first sensor and controlling the second valve to be switched between an outlet connected with the collecting mechanism and an external outlet according to a concentration signal of carbon dioxide in the gas measured by the second sensor. This gaseous collection system can effectively gather sample gas, is showing improvement suitability and convenience.

Optionally, the breath control device further comprises a timer electrically connected to the controller, the timer is configured to obtain an actual duration of the exhalation phase of the user according to the opening duration of the first valve, and when the actual duration reaches a preset duration, the controller is configured to control the first valve to be closed.

Optionally, the gas collection device further comprises a third valve communicated with the outlet of the collection mechanism and a third sensor arranged on the third valve, wherein the third sensor is used for detecting a carbon monoxide concentration signal in the gas entering the third valve through the outlet of the collection mechanism; the controller is also electrically connected with the third valve and the third sensor respectively, and when the actual duration reaches the preset duration, the controller is used for controlling the third valve to be opened and calculating the concentration value of carbon monoxide in the exhaled gas in the exhalation stage of the user according to the concentration signal of carbon monoxide in the gas measured by the third sensor.

Optionally, the third valve further comprises an external inlet, a second filter is further disposed at the external inlet of the third valve, an inlet of the second filter is communicated with the outside air, the second filter is configured to filter carbon monoxide in the air entering the third valve through the external inlet, and the third sensor is further configured to detect a concentration signal of the carbon monoxide in the air entering the third valve after filtering; the controller is also used for controlling the third valve to switch between the inlet connected with the collecting mechanism and the external inlet according to the concentration signal of the carbon monoxide in the gas measured by the third sensor, and calculating the concentration value of the carbon monoxide in the gas according to the concentration signal of the carbon monoxide in the gas measured by the third sensor and the concentration signal of the carbon monoxide in the air.

Optionally, the gas purification device further comprises a display screen electrically connected with the controller, and the display screen is used for displaying the concentration value of carbon monoxide in the gas calculated by the controller.

Optionally, the gas-liquid separator further comprises a power mechanism, and the power mechanism is configured to draw the gas entering the third valve through the outlet of the collecting mechanism, pass through the third sensor, and draw the filtered air entering the third valve, pass through the third sensor.

Optionally, the gas drying device further comprises a drying mechanism, disposed between the third valve and the third sensor, for drying the gas communicated to the third sensor through the third valve.

Optionally, the first sensor is a pressure sensor, the second sensor is a carbon dioxide sensor, and the third sensor is a carbon monoxide sensor.

Optionally, the first valve is a stop valve, and the second valve and the third valve are both three-way solenoid valves.

Optionally, two ends of the first filter are provided with a membrane check valve, and the air permeation direction of the membrane check valve is from one side of the first filter far away from the first valve to one side of the first filter close to the first valve.

The utility model discloses beneficial effect includes:

the gas collecting device comprises a collecting mechanism, a first valve, a second valve and a collecting mechanism which are sequentially communicated, wherein a first filter is arranged in the collecting mechanism and used for filtering carbon monoxide in air, and the second valve also comprises an external outlet which is communicated with the outside air; a first sensor and a second sensor are respectively arranged between the acquisition mechanism and the first valve and are used for respectively acquiring a gas pressure signal of the gas and a concentration signal of carbon dioxide in the gas; the controller is used for controlling the opening and closing of the first valve according to a gas pressure signal of the gas measured by the first sensor and controlling the switching of the second valve between an outlet connected with the collecting mechanism and an external outlet according to a concentration signal of carbon dioxide in the gas measured by the second sensor. When the user is in the stage of breathing in, the outside air is inhaled by the human body in the import entering collection mechanism of collection mechanism afterwards, at above-mentioned in-process, because the carbon monoxide in the air can be filtered by first filter, consequently, through addding first filter to make the carbon monoxide in the air can not get into the human body, and the air after filtering carbon monoxide can get into the human body, thereby avoids the influence of exogenous CO to gathering sample gas, and then improves the accuracy of gathering sample gas. When the user is in the expiration stage, expired gas is discharged from the human body and then leads to the import of first valve via the export of gathering the mechanism, at above-mentioned in-process, because expired gas can lead to the atmospheric pressure in the pipeline to rise, consequently, can acquire the atmospheric pressure signal of expired gas through first sensor to make the controller can open according to the atmospheric pressure signal control first valve of expired gas that first sensor surveyed, thereby make expired gas can get into in the second valve via the export of first valve. Meanwhile, in the above process, since whether the user is at the end of expiration can be determined according to the concentration of carbon dioxide in the exhaled air, the concentration signal of carbon dioxide in the exhaled air can be acquired by the second sensor, so that the controller can control the second valve to switch between the outlet connected to the collecting mechanism and the external outlet according to the concentration signal of carbon dioxide in the exhaled air measured by the second sensor. Specifically, when the user is not at the end of expiration, the controller controls the external outlet of the second valve to be opened so that the exhaled gas is discharged to the air, and when the user starts to be at the end of expiration, the controller controls the outlet of the second valve connected with the collecting mechanism to be opened so that the exhaled gas enters the collecting mechanism, so that the exhaled gas collected by the collecting mechanism meets the requirement (end of expiration) of the sample gas collecting stage, and the gas collecting device can effectively collect the sample gas. When the user finishes expiration and restarts inspiration, the flow of the expired gas is reduced to cause the pressure in the pipeline to be reduced, so that the pressure signal of the expired gas can be acquired through the first sensor, the controller can control the first valve to be closed according to the pressure signal of the expired gas measured by the first sensor, the process is repeated, the expired gas collected by the collecting mechanism meets the requirement of the collection duration of the sample gas (for example, 15 s), and the gas collecting device can effectively collect the sample gas.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a gas collecting device according to an embodiment of the present invention;

fig. 2 is a second schematic structural diagram of a gas collecting device according to an embodiment of the present invention;

fig. 3 is a third schematic structural view of a gas collecting device according to an embodiment of the present invention;

fig. 4 is a fourth schematic structural view of a gas collecting device according to an embodiment of the present invention;

fig. 5 is a fifth schematic structural view of a gas collecting device according to an embodiment of the present invention.

Icon: 100-a gas collection device; 10-a collection mechanism; 101-a first filter; 11-a first valve; 12-a second valve; 13-a first sensor; 14-a second sensor; 20-a collection mechanism; 21-a third valve; 22-a second filter; 23-a third sensor; 24-a power mechanism; 25-a drying mechanism; 30-a controller; 40-a timer; 50-display screen.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be internal to both elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The CO breath test measures red blood cell life (RBCS) by measuring the endogenous CO concentration. As the human body exhales CO, there are three main sources: heme degradation, non-heme metabolic production, and exogenous inhalation. Wherein 86% of endogenous CO is from heme degradation and no more than 14% of CO is produced by non-heme metabolism. While 85% of the heme that produces CO comes from hemoglobin degradation of red blood cells and 15% from non-red blood cell heme. Thus, overall about 70% of exhaled endogenous CO results from red blood cell degradation. Under the premise of eliminating external interference, the lung CO excretion rate can be used for calculating the destruction speed of the red blood cells, the time required for calculating the total decomposition of the total blood hemoglobin is the predicted value of the service life of the red blood cells at the moment, and the simplified calculation formula is as follows:

erythrocyte lifespan (day) ═ hemoglobin concentration (g/L) × 1.38/endogenous CO concentration in expiration (ppm) (1)

The CO expiration test method is recommended as a method for clinical RBCS determination by the Chinese expert consensus on clinical application of erythrocyte life determination in blood system diseases. For example, monitoring of neonatal hyperbilirubinemia, assessment of high risk factors, and correct and timely treatment are of great importance in preventing severe hyperbilirubinemia and bilirubin encephalopathy. The bilirubin level of the newborn after birth is a dynamic process, and the determination of the CO content in the exhaled breath can reflect the bilirubin production rate, so that the method can be used for predicting the possibility of the occurrence of hyperbilirubinemia of the infant with hemolysis. When the CO concentration in the expired air is measured for a newborn at 24 hours after birth and is less than 2.0ppm, no adverse results are observed.

However, the conventional sampling device needs to perform artificial control exhalation under the guidance of an operator, and has a problem that a tester lacking cognition or communication irregularity, such as a newborn baby, cannot effectively collect sample gas.

Therefore, the application provides a gas collection device 100, which can effectively collect sample gas, obviously improve the applicability and the convenience, and solve the problem that the sampling device can not effectively collect the sample gas in the prior art.

Specifically, referring to fig. 1 to 5, the gas collecting device 100 includes a collecting mechanism 10, a first valve 11, a second valve 12 and a collecting mechanism 20, which are sequentially communicated, a first filter 101 is disposed in the collecting mechanism 10, the first filter 101 is used for filtering carbon monoxide in air, the second valve 12 further includes an external outlet, and the external outlet is communicated with the outside air; a first sensor 13 and a second sensor 14 are respectively arranged between the acquisition mechanism 10 and the first valve 11 and are used for respectively acquiring a gas pressure signal of the gas and a concentration signal of carbon dioxide in the gas; the gas pressure sensor further comprises a controller 30 electrically connected with the first valve 11, the second valve 12, the first sensor 13 and the second sensor 14 respectively, wherein the controller 30 is used for controlling the opening and closing of the first valve 11 according to a gas pressure signal of the gas measured by the first sensor 13 and controlling the switching of the second valve 12 between an outlet connected with the collecting mechanism 20 and an external outlet according to a concentration signal of carbon dioxide in the gas measured by the second sensor 14.

It should be noted that the gas collecting apparatus 100 includes a collecting mechanism 10, a first valve 11, a second valve 12 and a collecting mechanism 20, and the collecting mechanism 10, the first valve 11, the second valve 12 and the collecting mechanism 20 are sequentially communicated, in other words, an inlet of the collecting mechanism 10 is connected to the outside air, an outlet of the collecting mechanism 10 is connected to an inlet of the first valve 11, an outlet of the first valve 11 is connected to an inlet of the second valve 12, and an outlet of the second valve 12 is connected to an inlet of the collecting mechanism 20.

When the user is in the stage of breathing in, the outside air is inhaled by the human body in getting into collection mechanism 10 subsequently via collection mechanism 10's import, at above-mentioned in-process, because the carbon monoxide in the air can be filtered by first filter 101, consequently, through addding first filter 101 to make the carbon monoxide in the air can not get into the human body, and the air after filtering carbon monoxide can get into the human body, thereby avoids the influence of exogenous CO to gathering the sample gas, and then improves the accuracy of gathering the sample gas.

When the user is in the exhalation phase, the exhaled gas is discharged from the human body and then passes through the outlet of the collecting mechanism 10 to the inlet of the first valve 11, in the process, since the exhaled gas may cause the gas pressure in the pipeline to rise, the gas pressure signal of the exhaled gas can be acquired through the first sensor 13, so that the controller 30 can control the first valve 11 to be opened according to the gas pressure signal of the exhaled gas measured by the first sensor 13, and the exhaled gas can enter the second valve 12 through the outlet of the first valve 11.

Meanwhile, in the above process, since it can be determined whether the user is at the end of expiration based on the concentration of carbon dioxide in the exhaled air, the concentration signal of carbon dioxide in the exhaled air can be acquired by the second sensor 14, so that the controller 30 can control the second valve 12 to switch between the outlet connected to the collection mechanism 20 and the external outlet based on the concentration signal of carbon dioxide in the exhaled air measured by the second sensor 14.

Specifically, when the user is not at the end of expiration, the controller 30 controls the external outlet of the second valve 12 to open, so that the exhaled air is exhausted into the air, and when the user starts to be at the end of expiration, the controller 30 controls the outlet of the second valve 12 connected to the collecting mechanism 20 to open, so that the exhaled air enters the collecting mechanism 20, and therefore the exhaled air collected by the collecting mechanism 20 meets the requirement (end of expiration) of the sample gas collection period, and further the gas collection device 100 can achieve effective collection of the sample gas.

When the user finishes expiration and restarts inspiration, the flow of the expired gas is reduced to cause a decrease in the gas pressure in the pipeline, so that the first sensor 13 can acquire a gas pressure signal of the expired gas, the controller 30 can control the first valve 11 to close according to the gas pressure signal of the expired gas measured by the first sensor 13, and the above process is repeated, so that the expired gas collected by the collecting mechanism 20 meets the requirement of the collection duration of the sample gas (for example, 15s, and the like), and the gas collecting device 100 can realize effective collection of the sample gas.

As described above, the gas collecting device 100 includes the collecting mechanism 10, the first valve 11, the second valve 12 and the collecting mechanism 20 which are sequentially communicated, the first filter 101 is disposed in the collecting mechanism 10, the first filter 101 is used for filtering carbon monoxide in air, the second valve 12 further includes an external outlet, and the external outlet is communicated with the outside air; a first sensor 13 and a second sensor 14 are respectively arranged between the acquisition mechanism 10 and the first valve 11 and are used for respectively acquiring a gas pressure signal of the gas and a concentration signal of carbon dioxide in the gas; the gas pressure sensor further comprises a controller 30 electrically connected with the first valve 11, the second valve 12, the first sensor 13 and the second sensor 14 respectively, wherein the controller 30 is used for controlling the opening and closing of the first valve 11 according to a gas pressure signal of the gas measured by the first sensor 13 and controlling the switching of the second valve 12 between an outlet connected with the collecting mechanism 20 and an external outlet according to a concentration signal of carbon dioxide in the gas measured by the second sensor 14. When the user is in the stage of breathing in, the outside air is inhaled by the human body in getting into collection mechanism 10 subsequently via collection mechanism 10's import, at above-mentioned in-process, because the carbon monoxide in the air can be filtered by first filter 101, consequently, through addding first filter 101 to make the carbon monoxide in the air can not get into the human body, and the air after filtering carbon monoxide can get into the human body, thereby avoids the influence of exogenous CO to gathering the sample gas, and then improves the accuracy of gathering the sample gas. When the user is in the exhalation phase, the exhaled gas is discharged from the human body and then passes through the outlet of the collecting mechanism 10 to the inlet of the first valve 11, in the process, since the exhaled gas may cause the gas pressure in the pipeline to rise, the gas pressure signal of the exhaled gas can be acquired through the first sensor 13, so that the controller 30 can control the first valve 11 to be opened according to the gas pressure signal of the exhaled gas measured by the first sensor 13, and the exhaled gas can enter the second valve 12 through the outlet of the first valve 11. Meanwhile, in the above process, since it can be determined whether the user is at the end of expiration based on the concentration of carbon dioxide in the exhaled air, the concentration signal of carbon dioxide in the exhaled air can be acquired by the second sensor 14, so that the controller 30 can control the second valve 12 to switch between the outlet connected to the collection mechanism 20 and the external outlet based on the concentration signal of carbon dioxide in the exhaled air measured by the second sensor 14. Specifically, when the user is not at the end of expiration, the controller 30 controls the external outlet of the second valve 12 to open, so that the exhaled air is exhausted into the air, and when the user starts to be at the end of expiration, the controller 30 controls the outlet of the second valve 12 connected to the collecting mechanism 20 to open, so that the exhaled air enters the collecting mechanism 20, and therefore the exhaled air collected by the collecting mechanism 20 meets the requirement (end of expiration) of the sample gas collection period, and further the gas collection device 100 can achieve effective collection of the sample gas. When the user finishes expiration and restarts inspiration, the flow of the expired gas is reduced to cause a decrease in the gas pressure in the pipeline, so that the first sensor 13 can acquire a gas pressure signal of the expired gas, the controller 30 can control the first valve 11 to close according to the gas pressure signal of the expired gas measured by the first sensor 13, and the above process is repeated, so that the expired gas collected by the collecting mechanism 20 meets the requirement of the collection duration of the sample gas (for example, 15s, and the like), and the gas collecting device 100 can realize effective collection of the sample gas.

As shown in fig. 5, in order to further increase the intelligence degree of the gas collecting apparatus 100, in this embodiment, the gas collecting apparatus 100 further includes a timer 40 electrically connected to the controller 30, the timer 40 is configured to obtain an actual duration of the exhalation phase of the user according to an opening duration of the first valve 11, and when the actual duration reaches a preset duration, the controller 30 is configured to control the first valve 11 to close, so that the exhaled gas collected by the collecting mechanism 20 meets the requirement of the collection duration of the sample gas.

It should be noted that, since the opening and closing of the first valve 11 will vary with the breathing phase of the user, when the user repeats the above process to collect the sample gas, the opening duration of the first valve 11 herein refers to the total duration of the process in which the user repeats the process, rather than the duration of the process in which the first valve 11 is opened during one breathing phase.

In addition, regarding the preset time period, those skilled in the art should be able to make reasonable selection and design according to the actual situation, and no specific limitation is made herein. Illustratively, the preset time period is 8s, 9s, 10s, 12s, 13s, 15s, or the like.

As shown in fig. 2, in order to perform data analysis on the collected sample gas to obtain the concentration of the endogenous CO, in this embodiment, the gas collecting apparatus 100 further includes a third valve 21 communicated with the outlet of the collecting mechanism 20, and a third sensor 23 disposed on the third valve 21, wherein the third sensor 23 is configured to detect a signal of the concentration of carbon monoxide in the gas entering the third valve 21 through the outlet of the collecting mechanism 20; the controller 30 is further electrically connected to the third valve 21 and the third sensor 23, respectively, and when the actual duration reaches the preset duration, the controller 30 is configured to control the third valve 21 to open, and calculate a carbon monoxide concentration value in the exhaled gas during the exhalation phase of the user according to the carbon monoxide concentration signal in the gas measured by the third sensor 23.

It should be noted that, when data analysis needs to be performed on the collected sample gas after the sample gas is collected, that is, when the actual time length reaches the preset time length, the controller 30 can control the third valve 21 to open, at this time, the sample gas enters the third valve 21 through the outlet of the collecting mechanism 20 and is then detected by the third sensor 23, so that a carbon monoxide concentration signal in the exhaled gas (i.e., the sample gas) during the exhalation phase of the user can be obtained through the third sensor 23, and the carbon monoxide concentration value in the sample gas can be calculated through a preset algorithm in the controller 30.

As shown in fig. 3, in order to reduce noise and improve the accuracy of the endogenous CO concentration, in this embodiment, the third valve 21 further includes an external inlet, a second filter 22 is further disposed at the external inlet of the third valve 21, an inlet of the second filter 22 is communicated with the outside air, the second filter 22 is configured to filter carbon monoxide in the air entering the third valve 21 through the external inlet, and the third sensor 23 is further configured to detect a concentration signal of the carbon monoxide in the air entering the third valve 21 after being filtered; the controller 30 is further configured to control the third valve 21 to switch between the inlet connected to the collecting mechanism 20 and the external inlet according to the carbon monoxide concentration signal in the gas measured by the third sensor 23, and calculate the carbon monoxide concentration value in the gas according to the carbon monoxide concentration signal in the gas measured by the third sensor 23 and the carbon monoxide concentration signal in the air.

It should be noted that, when data analysis needs to be performed on the collected sample gas after the sample gas is collected, that is, when the actual time length reaches the preset time length, the controller 30 can control the inlet of the third valve 21 connected to the collecting mechanism 20 to be opened and the external inlet to be closed, at this time, the sample gas can enter the third valve 21 through the outlet of the collecting mechanism 20 and the inlet of the third valve 21 connected to the collecting mechanism 20 in sequence, and then is detected by the third sensor 23, so that a concentration signal of carbon monoxide in the sample gas can be obtained by the third sensor 23.

After the third sensor 23 obtains the concentration signal of carbon monoxide in the sample gas, the controller 30 can control the inlet of the third valve 21 connected to the collecting mechanism 20 to be closed and the external inlet to be opened, at this time, the external air can enter the third valve 21 through the second filter 22 and the external inlet of the third valve 21 in sequence and then be detected by the third sensor 23, so that the concentration signal of carbon monoxide in the air can be obtained by the third sensor 23, and the controller 30 calculates the concentration value of carbon monoxide in the sample gas according to the concentration signal of carbon monoxide in the sample gas and the concentration signal of carbon monoxide in the air, which are detected by the third sensor 23.

As shown in fig. 5, in this embodiment, the gas collection device 100 further includes a display screen 50 electrically connected to the controller 30, and the display screen 50 is used for displaying the concentration value of carbon monoxide in the gas calculated by the controller 30, so that the medical staff can intuitively obtain the concentration of endogenous CO, thereby improving the practicability of the gas collection device 100.

As shown in fig. 4, in order to allow the sample gas and the external air in the collection mechanism 20 to smoothly enter the third valve 21, in this embodiment, the gas collection device 100 further includes a power mechanism 24, the power mechanism 24 is configured to draw the gas entering the third valve 21 through the outlet of the collection mechanism 20 and pass through the third sensor 23, and draw the filtered air entering the third valve 21 and pass through the third sensor 23. For example, the power mechanism 24 may be an air pump.

As shown in fig. 4, in order to avoid the influence of the sample gas in the collection mechanism 20 and the moisture in the outside air on the accuracy of the endogenous CO concentration, in the present embodiment, the gas collection device 100 further includes a drying mechanism 25, and the drying mechanism 25 is disposed between the third valve 21 and the third sensor 23, and is used for drying the gas passing through the third valve 21 to the third sensor 23. For example, the drying mechanism 25 may be a desiccant.

In the present embodiment, the first sensor 13 is a pressure sensor so that the first sensor 13 can acquire a gas pressure signal of the gas, the second sensor 14 is a carbon dioxide sensor so that the second sensor 14 can acquire a concentration signal of carbon dioxide in the gas, and the third sensor 23 is a carbon monoxide sensor so that the third sensor 23 can acquire a concentration signal of carbon monoxide in the gas. In this embodiment, the first valve 11 is a stop valve, and the control instruction of the quick response controller 30 is used to improve the effectiveness of collecting the sample gas, the second valve 12 is a three-way electromagnetic valve, and the control instruction of the quick response controller 30 is used to enable the exhaled gas which is not at the end of exhalation to be exhausted to the air, the exhaled gas which is at the end of exhalation can be exhausted to the collection mechanism 20, and the effectiveness of collecting the sample gas is improved, the third valves 21 are three-way electromagnetic valves, and the control instruction of the quick response controller 30 is used to enable the sample gas and the outside air in the collection mechanism 20 to enter the third valves 21 respectively.

As shown in fig. 1 to 4, in the present embodiment, two ends of the first filter 101 are provided with a membrane check valve, and the ventilation direction of the membrane check valve is from the side of the first filter 101 away from the first valve 11 to the side of the first filter 101 close to the first valve 11, so as to prevent carbon monoxide in the air from entering the human body, and simultaneously prevent carbon monoxide in the exhaled air from being exhausted to the air through the collecting mechanism 10, thereby reducing the effectiveness of collecting the sample body.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A gas collecting device is characterized by comprising a collecting mechanism, a first valve, a second valve and a collecting mechanism which are sequentially communicated, wherein a first filter is arranged in the collecting mechanism and used for filtering carbon monoxide in air, the second valve further comprises an external outlet, and the external outlet is communicated with the outside air; a first sensor and a second sensor are respectively arranged between the acquisition mechanism and the first valve and are used for respectively acquiring a gas pressure signal of the gas and a concentration signal of carbon dioxide in the gas;

the gas pressure sensor is characterized by further comprising a controller which is electrically connected with the first valve, the second valve, the first sensor and the second sensor respectively, wherein the controller is used for controlling the opening and closing of the first valve according to a gas pressure signal of gas measured by the first sensor and controlling the second valve to be switched between an outlet connected with the collecting mechanism and an external outlet according to a concentration signal of carbon dioxide in the gas measured by the second sensor.

2. The gas collection device of claim 1, further comprising a timer electrically connected to the controller, wherein the timer is configured to obtain an actual duration of an expiratory phase of the user according to an opening duration of the first valve, and the controller is configured to control the first valve to close when the actual duration reaches a preset duration.

3. The gas-collecting device of claim 2, further comprising a third valve in communication with the outlet of the collecting mechanism and a third sensor disposed on the third valve for detecting a carbon monoxide concentration signal in the gas entering the third valve via the outlet of the collecting mechanism;

the controller is also electrically connected with the third valve and the third sensor respectively, and when the actual duration reaches the preset duration, the controller is used for controlling the third valve to be opened and calculating the concentration value of carbon monoxide in the exhaled gas in the exhalation stage of the user according to the concentration signal of carbon monoxide in the gas measured by the third sensor.

4. The gas collection device of claim 3, wherein the third valve further comprises an external inlet, a second filter is disposed at the external inlet of the third valve, an inlet of the second filter is in communication with the external air, the second filter is configured to filter carbon monoxide in the air entering the third valve through the external inlet, and the third sensor is further configured to detect a carbon monoxide concentration signal in the filtered air entering the third valve;

the controller is also used for controlling the third valve to switch between the inlet connected with the collecting mechanism and the external inlet according to the concentration signal of the carbon monoxide in the gas measured by the third sensor, and calculating the concentration value of the carbon monoxide in the gas according to the concentration signal of the carbon monoxide in the gas measured by the third sensor and the concentration signal of the carbon monoxide in the air.

5. The gas collection device of claim 4, further comprising a display screen electrically connected to the controller, wherein the display screen is configured to display the concentration value of carbon monoxide in the gas calculated by the controller.

6. The gas-collecting device of claim 4, further comprising a power mechanism for drawing gas that enters the third valve through the outlet of the collecting mechanism through the third sensor and drawing filtered air that enters the third valve through the third sensor.

7. The gas collection device of claim 4, further comprising a drying mechanism disposed between the third valve and the third sensor for drying the gas directed to the third sensor via the third valve.

8. The gas collection device of claim 3, wherein the first sensor is a pressure sensor, the second sensor is a carbon dioxide sensor, and the third sensor is a carbon monoxide sensor.

9. The gas collection device of claim 3, wherein the first valve is a shut-off valve, and the second valve and the third valve are each three-way solenoid valves.

10. The gas collecting device as claimed in any one of claims 1 to 9, wherein a membrane check valve is disposed at each end of the first filter, and the gas permeation direction of the membrane check valve is from the side of the first filter away from the first valve to the side of the first filter close to the first valve.

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