Gas concentration detection device

Abstract

The embodiment of the present application provides a gas concentration detection device, which includes a first detection unit, a gas collection unit, a first three-way valve, a second detection unit, a first air pump, a first port, a second port, and a third port; the first detection unit is connected between the first port and the gas collection unit; the first three-way valve is respectively connected to the gas collection unit, the second detection unit, and the third port; the first air pump is connected between the second port and the second detection unit. This solution can improve the accuracy of gas concentration detection.

Description

Technical Field

[0001] The present application relates to the technical field of gas concentration detection, and in particular to a gas concentration detection device. Background Art

[0002] The components of human exhaled air are mainly composed of air, cavity air and endogenous gases. The concentration information of various gases in endogenous gases is closely related to human diseases and physiological conditions. For example, carbon monoxide in endogenous gases is related to the life span of human red blood cells.

[0003] At present, the concentration of the target gas in the endogenous gas is usually obtained by subtracting the concentration of the target gas in the ambient atmosphere from the concentration of the target gas in the exhaled breath. Although the interference of air on the detection of the concentration of the target gas in the endogenous gas is reduced, the detection result is still not ideal. Summary of the invention

[0004] The embodiment of the present application provides a gas concentration detection device, which can improve the accuracy of gas concentration detection.

[0005] The embodiment of the present application provides a gas concentration detection device, including a first detection unit, a gas collection unit, a first three-way valve, a second detection unit, a first air pump, a first port, a second port, and a third port;

[0006] The first detection unit is connected between the first port and the gas collection unit;

[0007] The first three-way valve is connected to the gas collecting unit, the second detection unit, and the third port respectively;

[0008] The first air pump is connected between the second port and the second detection unit.

[0009] In the gas concentration detection device provided in the embodiment of the present application, the gas collection unit includes a first gas collection sub-unit, a second gas collection sub-unit, a first sub-three-way valve and a second sub-three-way valve;

[0010] The first sub-three-way valve is respectively connected to the first detection unit, the first sub-gas collecting unit, and the second sub-three-way valve;

[0011] The second sub-three-way valve is connected to the first sub-three-way valve, the second sub-gas collecting unit, and the first three-way valve respectively.

[0012] In the gas concentration detection device provided in the embodiment of the present application, the gas collection unit includes a four-way valve, a first sub-gas collection unit and a second sub-gas collection unit;

[0013] The four-way valve is connected to the first sub-gas collecting unit, the second sub-gas collecting unit, the first detection unit, and the first three-way valve respectively.

[0014] In the gas concentration detection device provided in the embodiment of the present application, the gas concentration detection device further includes a second air pump;

[0015] The second air pump is connected between the first three-way valve and the third port.

[0016] In the gas concentration detection device provided in the embodiment of the present application, the gas concentration detection device further includes a second air pump, a fourth port and a second three-way valve;

[0017] The second air pump is connected between the fourth port and the second three-way valve;

[0018] The second three-way valve is connected between the first port and the first detection unit.

[0019] In the gas concentration detection device provided in the embodiment of the present application, the gas concentration detection device further includes a second air pump and a fourth port;

[0020] The second air pump is connected between the air collecting unit and the fourth port.

[0021] In the gas concentration detection device provided in the embodiment of the present application, the second gas pump includes a first sub-gas pump and a second sub-gas pump;

[0022] The fourth opening includes a first sub-opening and a second sub-opening;

[0023] The first sub-gas pump is connected between the first sub-gas collecting unit and the first sub-port;

[0024] The second sub-gas pump is connected between the second sub-gas collecting unit and the second sub-port.

[0025] In the gas concentration detection device provided in the embodiment of the present application, the second detection unit includes a temperature control subunit and a sensor subunit, and the sensor subunit is arranged inside the temperature control subunit.

[0026] In the gas concentration detection device provided in the embodiment of the present application, the gas concentration detection device further includes a control unit;

[0027] The control unit is electrically connected to the first detection unit, the gas collection unit, the first three-way valve, the second detection unit and the first air pump respectively.

[0028] In the gas concentration detection device provided in the embodiment of the present application, the gas concentration detection method implemented based on the gas concentration device includes a first stage, a second stage and a third stage;

[0029] When the first stage begins, the gas to be detected is input into the gas collecting unit through the first port, the control unit controls the first three-way valve to block the connection between the gas collecting unit and the first three-way valve, and controls the first detection unit to detect the current type of the gas to be detected, and then controls the gas collecting unit to store the gas to be detected respectively according to the current type of the gas to be detected, until the first type of gas to be detected and / or the second type of gas to be detected in the gas collecting unit is full, then stops inputting the gas to be detected, thereby ending the first stage;

[0030] When the second stage begins, the control unit controls the first three-way valve to connect the second detection unit and the third port, blocks the connection between the gas collection unit and the first three-way valve, controls the first air pump to suck air into the second detection unit through the third port, and then controls the second detection unit to detect the concentration of the target gas in the air to obtain a first concentration, thereby ending the second stage;

[0031] When the third stage begins, the control unit controls the first three-way valve to connect the gas collecting unit and the second detection unit, blocks the connection between the first three-way valve and the third port, and controls the first air pump to suck the first type of gas to be detected or the second type of gas to be detected in the gas collecting unit into the second detection unit through the first three-way valve, and the control unit controls the second detection unit to detect the concentration of the target gas in the first type of gas to be detected or the second type of gas to be detected to obtain a second concentration, and then the control unit obtains a third concentration based on the first concentration and the second concentration.

[0032] The gas concentration detection device provided in the embodiment of the present application includes a first detection unit, a gas collection unit, a first three-way valve, a second detection unit, a first air pump, a first port, a second port and a third port; the first detection unit is connected between the first port and the gas collection unit; the first three-way valve is respectively connected to the gas collection unit, the second detection unit and the third port; the first air pump is connected between the second port and the second detection unit. This solution uses the second detection unit to detect the concentration of the target gas in the first type of gas to be detected or the second type of gas to be detected and the concentration of the target gas in the air, respectively, to obtain a first concentration and a second concentration, and then obtains the third concentration based on the first concentration and the second concentration, thereby reducing the interference of air on the detection of the concentration of the target gas in the first type of gas to be detected or the second type of gas to be detected, and effectively improving the accuracy of gas concentration detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 It is a first structural schematic diagram of the gas concentration detection device provided in an embodiment of the present application.

[0035] Figure 2 It is a schematic diagram of the structure of the first three-way valve provided in an embodiment of the present application.

[0036] Figure 3a It is a schematic diagram of the structure of the gas collection unit provided in the embodiment of the present application.

[0037] Figure 3b It is a schematic diagram of the structure of the first sub-three-way valve provided in an embodiment of the present application.

[0038] Figure 3c It is a schematic diagram of the structure of the second sub-three-way valve provided in an embodiment of the present application.

[0039] Figure 4a It is another structural schematic diagram of the gas collection unit provided in an embodiment of the present application.

[0040] Figure 4b It is a structural schematic diagram of the four-way valve provided in an embodiment of the present application.

[0041] Figure 5 It is a schematic diagram of the structure of the second detection unit provided in an embodiment of the present application.

[0042] Figure 6It is a second structural schematic diagram of the gas concentration detection device provided in an embodiment of the present application.

[0043] Figure 7 This is a third structural schematic diagram of the gas concentration detection device provided in an embodiment of the present application.

[0044] Figure 8a This is a fourth structural schematic diagram of the gas concentration detection device provided in an embodiment of the present application.

[0045] Figure 8b It is a schematic diagram of the structure of the second air pump and the fourth port provided in an embodiment of the present application. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0047] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0048] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can also be the internal connection of two components, it can be a wireless connection, or it can be a wired connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] In addition, the technical features involved in the different embodiments of the present application described above can be combined with each other as long as they do not conflict with each other.

[0050] An embodiment of the present application provides a gas concentration detection device, which will be described in detail below.

[0051] See also Figure 1, Figure 1 The gas concentration detection device 100 may include a first detection unit 10, a gas collection unit 20, a first three-way valve 30, a second detection unit 40, a first air pump 50, a first port A, a second port B and a third port C.

[0052] The first detection unit 10 is connected between the first port A and the gas collection unit 20. The first three-way valve 30 is respectively connected to the gas collection unit 20, the second detection unit 40, and the third port C. The first air pump 50 is connected between the second port B and the second detection unit 40.

[0053] The first detection unit 10 may be an integrated device of one or more of a pressure meter, a flow meter, a pressure sensor, a flow sensor and a gas sensor.

[0054] In the embodiment of the present application, the gas concentration detection device 100 may further include a control unit 60. The control unit 60 may be electrically connected to the first detection unit 10, the gas collection unit 20, the first three-way valve 30, the second detection unit 40 and the first air pump 50 respectively.

[0055] like Figure 2 As shown, the first three-way valve 30 may include a first valve 31, a second valve 32 and a third valve 33. Specifically, the first three-way valve 30 may be connected to the gas collection unit 20 through the first valve 31. The first three-way valve 30 may be connected to the second detection unit 40 through the second valve 32. The first three-way valve 30 may be connected to the third port C through the third valve 33.

[0056] It should be noted that the gas concentration detection method implemented based on the gas concentration detection device 100 may include a first stage, a second stage and a third stage.

[0057] When the first stage begins, the gas to be detected is input into the gas collecting unit 20 through the first port A, the control unit 60 controls the first three-way valve 30 to block the connection between the gas collecting unit 20 and the first three-way valve 30, and controls the first detection unit 10 to detect the current type of the gas to be detected, and then controls the gas collecting unit 20 to store the gas to be detected separately according to the current type of the gas to be detected, until the first type of gas to be detected and / or the second type of gas to be detected in the gas collecting unit 20 is full, then the input of the gas to be detected is stopped, thereby ending the first stage.

[0058] Specifically, when the first stage begins, the gas to be detected is input into the gas collection unit 20 through the first port A, and the control unit 60 controls the first valve 31 to close to block the connection between the gas collection unit 20 and the first three-way valve 30. Then the first detection unit 10 is controlled to detect the current type of the gas to be detected, and then the gas collection unit 20 is controlled to store the gas to be detected according to the current type of the gas to be detected, until the first type of gas to be detected and / or the second type of gas to be detected in the gas collection unit 20 are full, the input of the gas to be detected is stopped, thereby ending the first stage.

[0059] When the second stage begins, the first three-way valve 30 of the control unit 60 connects the second detection unit 40 and the third port C, blocks the connection between the gas collecting unit 20 and the first three-way valve 30, and controls the first air pump 50 to suck air into the second detection unit 40 through the third port C, and then controls the second detection unit 40 to detect the concentration of the target gas in the air to obtain the first concentration, thereby ending the second stage.

[0060] Specifically, when the second stage begins, the control unit 60 controls the first valve 31 to close, and controls the second valve 32 and the third valve 33 to open, so as to connect the second detection unit 40 and the third port C, and block the connection between the gas collection unit 20 and the first three-way valve 30. Then, the first air pump 50 is controlled to suck air into the second detection unit 40 through the third port C, and then the second detection unit 40 is controlled to detect the concentration of the target gas in the air to obtain the first concentration, thereby ending the second stage.

[0061] When the third stage begins, the control unit 60 controls the first three-way valve 30 to connect the gas collecting unit 20 and the second detection unit 40, blocks the connection between the first three-way valve 30 and the third port C, and controls the first air pump 50 to suck the first type of gas to be detected or the second type of gas to be detected in the gas collecting unit 20 into the second detection unit 40 through the first three-way valve 30. The control unit 60 controls the second detection unit 40 to detect the concentration of the target gas in the first type of gas to be detected or the second type of gas to be detected to obtain a second concentration. Then, the control unit 60 obtains a third concentration based on the first concentration and the second concentration.

[0062] Specifically, when the third stage begins, the control unit 60 controls the first valve 31 and the second valve 32 to open, and controls the third valve 33 to close, so as to connect the gas collection unit 20 and the second detection unit 40, and block the connection between the first three-way valve 30 and the third port C. Then, the first air pump 50 is controlled to suck the first type of gas to be detected or the second type of gas to be detected in the gas collection unit 20 into the second detection unit 40 through the first three-way valve 30, and the control unit 60 controls the second detection unit 40 to detect the concentration of the target gas in the first type of gas to be detected or the second type of gas to be detected, and obtains the second concentration, and then the control unit 60 obtains the third concentration according to the first concentration and the second concentration.

[0063] Specifically, the third concentration may be obtained by subtracting the second concentration from the first concentration.

[0064] It should be noted that the first and second stages can be carried out at the same time. The third stage begins after the first and second stages are completed.

[0065] In some embodiments, the first stage can also be performed in advance, so that the gas collection unit 20 collects the first type of gas to be detected or the second type of gas to be detected in advance. When detection is required, the second stage and the third stage are started, thereby realizing offline detection of gas concentration.

[0066] In the embodiment of the present application, the gas to be detected may be human exhaled breath, the first type of gas to be detected may be cavity gas or endogenous gas, and the second type of gas to be detected may be cavity gas or endogenous gas.

[0067] It should be noted that the first type of gas to be detected is different from the second type of gas to be detected. For example, if the first type of gas to be detected is cavity gas, then the second type of gas to be detected is endogenous gas. If the first type of gas to be detected is endogenous gas, then the second type of gas to be detected is cavity gas.

[0068] In some embodiments, the gas collection unit 20 can be as follows Figure 3a As shown, it includes a first gas collecting sub-unit 21, a second gas collecting sub-unit 22, a first sub-three-way valve 23 and a second sub-three-way valve 24. The first sub-three-way valve 23 is respectively connected to the first detection unit 10, the first sub-gas collecting unit 21, and the second sub-three-way valve 24. The second sub-three-way valve 24 is respectively connected to the first sub-three-way valve 23, the second sub-gas collecting unit 22, and the first three-way valve 30.

[0069] like Figure 3bAs shown, the first sub-three-way valve 23 may include a fourth valve 231, a fifth valve 232 and a sixth valve 233. The fourth valve 231 is connected to the first detection unit 10. The fifth valve 232 is connected to the second sub-three-way valve 24. The sixth valve 233 is connected to the first sub-gas collecting unit 21.

[0070] like Figure 3c As shown, the second sub-three-way valve 24 may include a seventh valve 241, an eighth valve 242 and a ninth valve 243. The seventh valve 241 is connected to the first sub-three-way valve 23. The eighth valve 242 is connected to the first three-way valve 30. The ninth valve 243 is connected to the second sub-gas collecting unit 244.

[0071] It is understandable that the first gas collection subunit 21 can be used to store the first type of gas to be detected or the second type of gas to be detected. The second gas collection subunit 22 can be used to store the first type of gas to be detected or the second type of gas to be detected.

[0072] It should be noted that the types of gases to be detected stored in the first gas collection subunit 21 and the second gas collection subunit 22 are different. For example, the first gas collection subunit 21 is used to store the first type of gas to be detected, and the second gas collection subunit 22 is used to store the second type of gas to be detected. The first gas collection subunit 21 is used to store the second type of gas to be detected, and the second gas collection subunit 22 is used to store the first type of gas to be detected.

[0073] It is understandable that the control unit 60 may also be electrically connected to the first sub three-way valve 23 and the second sub three-way valve 24 respectively.

[0074] During the specific implementation process, the control unit 60 can control the first sub-three-way valve 23 and the second sub-three-way valve 24 respectively, so that the fourth valve 231, the fifth valve 232, the sixth valve 233, the seventh valve 241, the eighth valve 242 and the ninth valve 243 can be opened or closed according to actual conditions to realize the separate storage of the first type of gas to be detected and the second type of gas to be detected.

[0075] For example, the gas to be detected is human exhaled air, the first sub-gas collection unit 21 is used to store cavity gas, and the second sub-gas collection unit 22 is used to store endogenous gas. The gas concentration detection device 100 needs to detect the concentration of the target gas in the endogenous gas.

[0076] At this time, when the first stage begins, the control unit 60 controls the fourth valve 231 and the sixth valve 233 to open, and controls the fifth valve 232 to close, so that the cavity gas is input to the first sub-gas collection unit 21 through the first sub-three-way valve 23. At the same time, the control unit 60 controls the first detection unit 10 to detect the current type of exhalation in real time. When it is detected that the current type of exhalation is endogenous gas, the fifth valve 232, the seventh valve 241 and the ninth valve 243 are controlled to open, and the sixth valve 233 and the eighth valve 242 are controlled to close, so that the endogenous gas is input to the second sub-gas collection unit 22 through the first sub-three-way valve 23 and the second sub-three-way valve 24. When the third stage begins, the control unit 60 controls the seventh valve 241 to close, and controls the ninth valve 243 to open, so that the endogenous gas is input to the first three-way valve 30 through the second sub-three-way valve 24.

[0077] In some embodiments, the gas collection unit 20 can be as follows Figure 4a As shown, it includes a first sub-gas collecting unit 21, a second sub-gas collecting unit 22 and a four-way valve 25. The four-way valve 25 is connected to the first sub-gas collecting unit 21, the second sub-gas collecting unit 22, the first detection unit 10 and the first three-way valve 30 respectively.

[0078] like Figure 4b As shown, the four-way valve 25 may include a tenth valve 251, an eleventh valve 252, a twelfth valve 253 and a thirteenth valve 254. The tenth valve 251 is connected to the first detection unit 10. The eleventh valve 252 is connected to the first three-way valve 30. The twelfth valve 253 is connected to the first sub-gas collection unit 21. The twelfth valve 253 is connected to the second sub-gas collection unit 254.

[0079] It can be understood that the control unit 60 can be electrically connected to the four-way valve 25 .

[0080] In the specific implementation process, the control unit 60 controls the four-way valve 25 so that the tenth valve 251, the eleventh valve 252, the twelfth valve 253 and the thirteenth valve 254 can be opened or closed according to actual conditions to realize the separate storage of the first type of gas to be detected and the second type of gas to be detected.

[0081] For example, the gas to be detected is human exhaled air, the first sub-gas collection unit 21 is used to store cavity gas, and the second sub-gas collection unit 22 is used to store endogenous gas. The gas concentration detection device 100 needs to detect the concentration of the target gas in the endogenous gas. The target gas may be carbon monoxide, nitric oxide, etc.

[0082] At this time, when the first stage begins, the control unit 60 controls the tenth valve 251 and the twelfth valve 253 to open, and controls the eleventh valve 252 and the thirteenth valve 254 to close, so that the cavity gas is input to the first sub-gas collection unit 21 through the four-way valve 25. At the same time, the control unit 60 controls the first detection unit 10 to detect the current type of exhalation in real time. When it is detected that the current type of exhalation is endogenous gas, the control unit 60 controls the thirteenth valve 254 to open, and controls the twelfth valve 253 to close, so that the endogenous gas is input to the second sub-gas collection unit 22 through the four-way valve 25. When the third stage begins, the control unit 60 controls the tenth valve 251 to close, and controls the thirteenth valve 254 to open, so that the endogenous gas is input to the first three-way valve 30 through the four-way valve 25.

[0083] It should be noted that the specific structure of the gas collection unit 20 includes but is not limited to the above embodiments, and the gas collection unit 20 provided in the embodiment of the present application may also include other embodiments. For example, the gas collection unit 20 may include a first sub-gas collection unit 21, a second sub-gas collection unit 22, two three-way valves, and a two-way valve. For another example, the gas collection unit 20 may include a first sub-gas collection unit 21, a second sub-gas collection unit 22, two two-way valves, and two three-way valves.

[0084] In the embodiment of the present application, the material of the first sub-gas collecting unit 21 and the second sub-gas collecting unit 22 is a soft material, so that the gas pressure in the first sub-gas collecting unit 21 and the second sub-gas collecting unit 22 can be equal to the atmospheric pressure, and the stability of the gas flow rate in the pipeline can be ensured. Among them, the volume of the first sub-gas collecting unit 21 and the second sub-gas collecting unit 22 can be 300 ml.

[0085] In some embodiments, Figure 5 As shown, the second detection unit 40 may include a temperature control subunit 41 and a sensor subunit 42. The sensor subunit 42 may be disposed in the temperature control subunit 41. The temperature control subunit 41 may adjust the temperature of the sensor subunit 42 so that the temperature of the sensor subunit 42 is constant, thereby avoiding the influence of the ambient temperature on the sensor subunit 42 and improving the gas concentration detection stability and accuracy of the sensor subunit 42.

[0086] In the embodiment of the present application, when the temperature of the sensor unit 42 is between 10 degrees Celsius and 25 degrees Celsius, the concentration detection stability and accuracy of the sensor unit 42 are high. Among them, when the temperature of the sensor unit 42 is 20 degrees Celsius, the gas concentration detection stability and accuracy of the sensor unit 42 are the highest.

[0087] In some embodiments, in order to ensure the stability and accuracy of gas concentration detection, before the start of the second stage, the control unit 60 can pre-control the temperature control subunit 41 to regulate the temperature of the sensor subunit 42, so that the gas concentration detection stability and accuracy of the sensor subunit 42 are higher.

[0088] In the specific implementation process, the first sub-gas collecting unit 21 and the second sub-gas collecting unit 22 of the gas collecting unit 20 may contain residual gas detected last time. Therefore, in order to avoid the residual gas from affecting the first type of gas to be detected and / or the second type of gas to be detected, the residual gas in the first sub-gas collecting unit 21 and the second sub-gas collecting unit 22 needs to be removed before the gas concentration detection begins.

[0089] like Figure 6 As shown, in some embodiments, the gas concentration detection device 100 may further include a second air pump 70. The second air pump 70 is electrically connected to the control unit 60. The second air pump 70 may be connected between the first three-way valve 30 and the third port C.

[0090] At this time, when it is necessary to remove the residual gas in the first sub-gas collection unit 21 and the second sub-gas collection unit 22, the control unit 60 can control the first valve 31 and the third valve 33 of the first three-way valve 30 to open, and control the second valve 32 to close. Then, the control unit 60 controls the second air pump 70 to start working, so that the residual gas in the first sub-gas collection unit 21 and the second sub-gas collection unit 22 can be discharged to the outside through the first three-way valve 30 and the third port C, until the residual gas in the first sub-gas collection unit 21 and the second sub-gas collection unit 22 is completely removed, and then the control unit 60 controls the second air pump 70 to stop working.

[0091] It is understandable that when removing the residual gas in the first sub-gas collecting unit 21 and the second sub-gas collecting unit 22, the control unit 60 can control the valves of the first sub-three-way valve 23 and the second sub-three-way valve 24, or the valves of the four-way valve 25 according to actual conditions. As long as the first sub-gas collecting unit 22 and the second sub-gas collecting unit 22 can be connected to the third port C through the first three-way valve 30, the details will not be repeated one by one.

[0092] like Figure 7 As shown, in some embodiments, the gas concentration detection device 100 may further include a second air pump 70, a fourth port D, and a second three-way valve 80. The second air pump 70 and the second three-way valve 80 may be electrically connected to the control unit 80, respectively. The second air pump 70 is connected between the second three-way valve 80 and the fourth port D. The second three-way valve 80 is connected between the first port A and the first detection unit 10.

[0093] At this time, when it is necessary to remove the residual gas in the first sub-gas collection unit 21 and the second sub-gas collection unit 22, the control unit 60 can control the valves of the second three-way valve 80 according to the actual situation, so that the first sub-gas collection unit 21 and the second sub-gas collection unit 22 can be connected to the fourth port D through the second three-way valve 80. Then, the control unit 60 controls the second air pump 70 to start working, so that the residual gas in the first sub-gas collection unit 21 and the second sub-gas collection unit 22 can be discharged to the outside through the second three-way valve 80 and the fourth port D, until the residual gas in the first sub-gas collection unit 21 and the second sub-gas collection unit 22 is completely removed, and the control unit 60 controls the second air pump 70 to stop working.

[0094] like Figure 8a As shown, in some embodiments, the gas concentration detection device 100 may further include a second air pump 70 and a fourth port D. The second air pump 70 is electrically connected to the control unit 60. The second air pump 70 is connected between the gas collection unit 20 and the fourth port D.

[0095] At this time, the second air pump 70 can be Figure 8b As shown, it includes a first sub-air pump 71 and a second sub-air pump 72. Among them, the first sub-air pump 71 is connected to the first sub-air collecting unit 21. The second sub-air pump 72 is connected to the second sub-air collecting unit 22. It should be noted that the first sub-air pump 71 can also be connected to the second sub-air collecting unit 22. The second sub-air pump 72 can also be connected to the first sub-air collecting unit 21. The control unit 60 can be electrically connected to the first sub-air pump 71 and the second sub-air pump 72 respectively.

[0096] The fourth port D may include a first sub-port d1 and a second sub-port d2. The first sub-port d1 is connected to the first sub-air pump 71. The second sub-port d2 is connected to the second sub-air pump 72. It should be noted that the first sub-port d1 may also be connected to the second sub-air pump 72. The second sub-port d2 may also be connected to the first sub-air pump 72.

[0097] At this time, when it is necessary to remove the residual gas in the first sub-gas collecting unit 21 and the second sub-gas collecting unit 22, the control unit 60 can start the first sub-gas pump 71 and the second sub-gas pump 72 to work, so that the residual gas in the first sub-gas collecting unit 21 and the second sub-gas collecting unit 22 can be discharged to the outside through the first sub-port d1 and the second sub-port d2. After the residual gas in the first sub-gas collecting unit 21 and the second sub-gas collecting unit 22 is completely removed, the control unit 60 controls the first sub-gas pump 71 and the second sub-gas pump 72 to stop working.

[0098] It should be noted that the working time of the second air pump 70 can be set according to actual conditions. For example, the working time required to remove the residual gas in the first sub-gas collecting unit 21 and the second sub-gas collecting unit 22 can be obtained according to the power of the second air pump 70 and the volume of the first sub-gas collecting unit 21 and the second sub-gas collecting unit 22.

[0099] It is understandable that the various devices in the embodiment of the present application are connected through a circuit or an air pipe. The outer diameter of the air pipe in the embodiment of the present application is 4-6 mm, and the inner diameter is 2.5-4 mm.

[0100] In summary, the gas concentration detection device 100 provided in the embodiment of the present application includes a first detection unit 10, a gas collection unit 20, a first three-way valve 30, a second detection unit 40, a first air pump 50, a first port A, a second port B and a third port C. The first detection unit 10 is connected between the first port A and the gas collection unit 20. The first three-way valve 30 is connected to the gas collection unit 20, the second detection unit 40 and the third port C respectively. The first air pump 50 is connected between the second port B and the second detection unit 40. This solution uses the second detection unit 40 to detect the concentration of the target gas in the first type of gas to be detected or the second type of gas to be detected and the concentration of the target gas in the air, respectively, to obtain the first concentration and the second concentration, and then obtain the third concentration based on the first concentration and the second concentration, so as to reduce the interference of the air on the detection of the concentration of the target gas in the first type of gas to be detected or the second type of gas to be detected, and effectively improve the accuracy of gas concentration detection.

[0101] The above is a detailed introduction to a gas concentration detection device provided in an embodiment of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the core idea of ​​the present application; at the same time, for technical personnel in this field, based on the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A gas concentration detection device, characterized in that: It includes a first detection unit, a gas collection unit, a first three-way valve, a second detection unit, a first air pump, a first port, a second port, a third port, a second air pump and a control unit; The first detection unit is connected between the first port and the gas collection unit; The first three-way valve is connected to the gas collecting unit, the second detection unit, and the third port respectively; The first air pump is connected between the second port and the second detection unit; The gas collection unit comprises a first gas collection sub-unit, a second gas collection sub-unit, a first sub-three-way valve, a second sub-three-way valve and a four-way valve; The first sub-three-way valve is respectively connected to the first detection unit, the first gas collection sub-unit, and the second sub-three-way valve; The second sub-three-way valve is connected to the first sub-three-way valve, the second gas collecting sub-unit, and the first three-way valve respectively; The four-way valve is respectively connected to the first gas collecting sub-unit, the second gas collecting sub-unit, the first detection unit, and the first three-way valve; The second air pump is connected between the first three-way valve and the third port; The second detection unit includes a temperature control subunit and a sensor subunit, and the sensor subunit is arranged inside the temperature control subunit; The control unit is electrically connected to the first detection unit, the gas collection unit, the first three-way valve, the second detection unit and the first air pump respectively; The gas concentration detection method implemented based on the gas concentration detection device includes a first stage, a second stage and a third stage; When the first stage begins, the gas to be detected is input into the gas collecting unit through the first port, the control unit controls the first three-way valve to block the connection between the gas collecting unit and the first three-way valve, and controls the first detection unit to detect the current type of the gas to be detected, and then controls the gas collecting unit to store the gas to be detected respectively according to the current type of the gas to be detected, until the first type of gas to be detected and / or the second type of gas to be detected in the gas collecting unit is full, then stops inputting the gas to be detected, thereby ending the first stage; When the second stage begins, the control unit controls the first three-way valve to connect the second detection unit and the third port, blocks the connection between the gas collection unit and the first three-way valve, controls the first air pump to suck air into the second detection unit through the third port, and then controls the second detection unit to detect the concentration of the target gas in the air to obtain a first concentration, thereby ending the second stage; When the third stage begins, the control unit controls the first three-way valve to connect the gas collecting unit and the second detection unit, blocks the connection between the first three-way valve and the third port, and controls the first air pump to suck the first type of gas to be detected or the second type of gas to be detected in the gas collecting unit into the second detection unit through the first three-way valve, and the control unit controls the second detection unit to detect the concentration of the target gas in the first type of gas to be detected or the second type of gas to be detected to obtain a second concentration, and then the control unit obtains a third concentration based on the first concentration and the second concentration.

2. A gas concentration detection device, characterized in that: It includes a first detection unit, a gas collection unit, a first three-way valve, a second detection unit, a first air pump, a first port, a second port, a third port, a second air pump, a fourth port, a second three-way valve and a control unit; The first detection unit is connected between the first port and the gas collection unit; The first three-way valve is connected to the gas collecting unit, the second detection unit, and the third port respectively; The first air pump is connected between the second port and the second detection unit; The gas collection unit comprises a first gas collection sub-unit, a second gas collection sub-unit, a first sub-three-way valve, a second sub-three-way valve and a four-way valve; The first sub-three-way valve is respectively connected to the first detection unit, the first gas collection sub-unit, and the second sub-three-way valve; The second sub-three-way valve is connected to the first sub-three-way valve, the second gas collecting sub-unit, and the first three-way valve respectively; The four-way valve is respectively connected to the first gas collecting sub-unit, the second gas collecting sub-unit, the first detection unit, and the first three-way valve; The control unit is electrically connected to the first detection unit, the gas collection unit, the first three-way valve, the second detection unit and the first air pump respectively; The second air pump is connected between the fourth port and the second three-way valve; The second three-way valve is connected between the first port and the first detection unit; The second detection unit includes a temperature control subunit and a sensor subunit, and the sensor subunit is arranged inside the temperature control subunit; The gas concentration detection method implemented based on the gas concentration detection device includes a first stage, a second stage and a third stage; When the first stage begins, the gas to be detected is input into the gas collecting unit through the first port, the control unit controls the first three-way valve to block the connection between the gas collecting unit and the first three-way valve, and controls the first detection unit to detect the current type of the gas to be detected, and then controls the gas collecting unit to store the gas to be detected respectively according to the current type of the gas to be detected, until the first type of gas to be detected and / or the second type of gas to be detected in the gas collecting unit is full, then stops inputting the gas to be detected, thereby ending the first stage; When the second stage begins, the control unit controls the first three-way valve to connect the second detection unit and the third port, blocks the connection between the gas collection unit and the first three-way valve, controls the first air pump to suck air into the second detection unit through the third port, and then controls the second detection unit to detect the concentration of the target gas in the air to obtain a first concentration, thereby ending the second stage; When the third stage begins, the control unit controls the first three-way valve to connect the gas collecting unit and the second detection unit, blocks the connection between the first three-way valve and the third port, and controls the first air pump to suck the first type of gas to be detected or the second type of gas to be detected in the gas collecting unit into the second detection unit through the first three-way valve, and the control unit controls the second detection unit to detect the concentration of the target gas in the first type of gas to be detected or the second type of gas to be detected to obtain a second concentration, and then the control unit obtains a third concentration based on the first concentration and the second concentration.

3. A gas concentration detection device, characterized in that: It includes a first detection unit, a gas collection unit, a first three-way valve, a second detection unit, a first air pump, a first port, a second port, a third port, a second air pump, a fourth port and a control unit; The first detection unit is connected between the first port and the gas collection unit; The first three-way valve is connected to the gas collecting unit, the second detection unit, and the third port respectively; The first air pump is connected between the second port and the second detection unit; The gas collection unit includes a first gas collection sub-unit, a second gas collection sub-unit, a first sub-three-way valve, a second sub-three-way valve and a four-way valve; The first sub-three-way valve is respectively connected to the first detection unit, the first gas collection sub-unit, and the second sub-three-way valve; The second sub-three-way valve is connected to the first sub-three-way valve, the second gas collecting sub-unit, and the first three-way valve respectively; The four-way valve is respectively connected to the first gas collecting sub-unit, the second gas collecting sub-unit, the first detection unit, and the first three-way valve; The second air pump is connected between the air collecting unit and the fourth port; The second air pump includes a first sub-air pump and a second sub-air pump; The fourth opening includes a first sub-opening and a second sub-opening; The first sub-gas pump is connected between the first gas collecting sub-unit and the first sub-port; The second sub-gas pump is connected between the second gas collecting sub-unit and the second sub-port; The second detection unit includes a temperature control subunit and a sensor subunit, and the sensor subunit is arranged inside the temperature control subunit; The control unit is electrically connected to the first detection unit, the gas collection unit, the first three-way valve, the second detection unit and the first air pump respectively; The gas concentration detection method implemented based on the gas concentration detection device includes a first stage, a second stage and a third stage; When the first stage begins, the gas to be detected is input into the gas collecting unit through the first port, the control unit controls the first three-way valve to block the connection between the gas collecting unit and the first three-way valve, and controls the first detection unit to detect the current type of the gas to be detected, and then controls the gas collecting unit to store the gas to be detected respectively according to the current type of the gas to be detected, until the first type of gas to be detected and / or the second type of gas to be detected in the gas collecting unit is full, then stops inputting the gas to be detected, thereby ending the first stage; When the second stage begins, the control unit controls the first three-way valve to connect the second detection unit and the third port, blocks the connection between the gas collection unit and the first three-way valve, controls the first air pump to suck air into the second detection unit through the third port, and then controls the second detection unit to detect the concentration of the target gas in the air to obtain a first concentration, thereby ending the second stage; When the third stage begins, the control unit controls the first three-way valve to connect the gas collecting unit and the second detection unit, blocks the connection between the first three-way valve and the third port, and controls the first air pump to suck the first type of gas to be detected or the second type of gas to be detected in the gas collecting unit into the second detection unit through the first three-way valve, and the control unit controls the second detection unit to detect the concentration of the target gas in the first type of gas to be detected or the second type of gas to be detected to obtain a second concentration, and then the control unit obtains a third concentration based on the first concentration and the second concentration.

Images