Gas circuit detection system of gas concentration detector
The gas concentration detector with a dual-branch design uses a flow switch and a one-way valve to handle high-pressure gas and a gas pump to handle low-pressure gas, which solves the problem of unstable detection results under different gas pressure environments and improves stability and reliability.
Patent Information
- Application Number
- CN202423065250.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2034-12-11
AI Technical Summary
Existing gas concentration detectors produce unstable results under different gas pressure environments, and their detection speed and accuracy are insufficient.
It adopts a dual-branch design, including a flow switch and a one-way valve to handle high-pressure gas, and an air pump to handle low-pressure gas. By precisely controlling the flow rate and ensuring the unidirectional airflow, a stable detection environment is created.
Maintaining a stable gas flow rate inside the sensor cavity under different external gas supply environments improves the stability and reliability of detection results, and enhances detection speed and efficiency.
Smart Images
Figure CN223841853U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of gas detection technology, and in particular to a gas concentration detector gas path system. Background Technology
[0002] When a gas concentration detector measures the gas concentration inside an incubator, an air pump is used to extract gas from the incubator, and the concentration of the extracted gas is measured to characterize the gas concentration inside the incubator. The speed and accuracy of this method depend on the rapid and precise detection of the extracted gas. Based on this method, common gas concentration detector design approaches include: designing a large gas chamber: A large gas chamber is designed inside the detector to house the internal sensor; designing a simple gas path: A simple extraction and detection gas path is designed, connecting the sensor and air pump only with a tubing, without other special accessories. The disadvantages of this approach are unstable detection values, easily affected by changes in the gas flow rate, or the need to extract a large amount of gas from the incubator, and the time required to fully evacuate the gas chamber. Therefore, there is an urgent need for a device capable of detecting gas in both low-pressure and high-pressure environments. Utility Model Content
[0003] In view of this, this application proposes a gas concentration detector gas path system that ensures the stability and reliability of the detection results in different environments.
[0004] According to one aspect of this application, a gas concentration detector detection gas path system is provided, including: a detection pipeline, a first three-way valve, a second three-way valve, a gas pump, a flow switch, a gas filling pipeline, and a sensor assembly;
[0005] The inlet end of the detection pipe is the air inlet, and the outlet end is the air outlet;
[0006] The flow switch and the sensor assembly are respectively disposed on the detection pipe, and the flow switch is adjacent to the air inlet of the detection pipe;
[0007] The first three-way valve and the second three-way valve are respectively connected and installed on the detection pipeline. The first three-way valve is located at the air inlet of the detection pipeline and between it and the flow switch. The second three-way valve is located between the flow switch and the sensor assembly.
[0008] The two ends of the inflation pipe are respectively connected to the first three-way valve and the second three-way valve;
[0009] The air pump is connected to the inflation pipe.
[0010] In one possible implementation, when the air inlet of the detection pipe is connected to a cavity containing high-pressure gas, the air pump is turned off, and the flow switch is adjusted to limit the flow rate of the high-pressure gas.
[0011] In one possible implementation, when the air inlet of the detection pipe is connected to a cavity containing low-pressure gas, the air pump is turned on to increase the flow rate of the low-pressure gas.
[0012] In one possible implementation, the detection gas path system further includes: a one-way valve;
[0013] The one-way valve is connected and installed on the detection pipeline, located between the flow switch and the second three-way valve;
[0014] The medium flow direction of the one-way valve is such that the air inlet of the detection pipe faces the air outlet of the detection pipe.
[0015] In one possible implementation, the sensor assembly includes a carbon dioxide sensor and an oxygen sensor;
[0016] The oxygen sensor's inlet is connected to the second three-way valve, and its outlet is connected to the carbon dioxide sensor's inlet.
[0017] The carbon dioxide inlet is connected to the outlet of the detection pipe.
[0018] In one possible implementation, the detection gas path system further includes: a housing;
[0019] The shell is a hollow, sealed structure;
[0020] The detection pipe, the first three-way valve, the second three-way valve, the air pump, the flow switch, the inflation pipe, and the sensor assembly are disposed inside the housing;
[0021] The side wall of the housing is provided with an air inlet and an air outlet. The air inlet is connected to and communicates with the air inlet of the detection pipe, and the air outlet is connected to and communicates with the air outlet of the detection pipe.
[0022] The beneficial effects of the gas concentration detector detection gas path system in this application embodiment are as follows: This application adopts a dual-branch design, which can maintain the stability of the gas flow rate in the sensor cavity under different external gas supply environments, thereby ensuring the stability and reliability of the detection results. Specifically, the dual-branch design includes two functional gas intake paths: one branch is equipped with a flow switch and a one-way valve, specifically designed to handle external high-pressure gas. The flow switch can accurately control the flow rate of the incoming gas to prevent excessive flow from affecting the detection results, while the one-way valve effectively prevents gas backflow, ensuring the unidirectional flow of gas and the continuity of the detection process. The other branch has a built-in air pump, whose main function is to actively extract gas from the incubator for detection. By flexibly adjusting the air pump's extraction speed and the flow switch limit, the system can ensure that the two branches have exactly the same flow rate during gas intake, thereby creating a consistent and stable detection environment for the sensor under different detection conditions. Thus, the dual-branch design of this gas path system not only improves the detection speed and efficiency but also ensures the stability and reliability of the detection results.
[0023] Other features and aspects of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description
[0024] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this application together with the specification and serve to explain the principles of this application.
[0025] Figure 1 This diagram shows the main structure of the gas concentration detector detection gas path system according to an embodiment of this application;
[0026] Figure 2 This diagram shows the main structure of the sensor assembly according to an embodiment of this application. Detailed Implementation
[0027] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.
[0028] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0030] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.
[0031] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.
[0032] like Figure 1 and Figure 2As shown, the gas concentration detector detection gas path system of this application embodiment includes: a detection pipeline 210, a first three-way valve 230, a second three-way valve 260, a gas pump 280, a flow switch 240, a gas filling pipeline 290, and a gas filling pipeline 270. The inlet end of the detection pipeline 210 is an inlet 220, which is responsible for introducing the gas to be detected, and the outlet end is an outlet 2010, which is used to discharge the gas that has been detected. The flow switch 240 and the gas filling pipeline 270 are respectively installed on the detection pipeline 210, and the flow switch 240 is close to the inlet 220 of the detection pipeline 210. The flow switch 240 monitors and controls the gas flow rate entering the detection pipeline 210 in real time. By accurately controlling the flow rate, it can be ensured that the gas filling pipeline 270 works stably, thereby improving the performance under high pressure. To ensure the accuracy and reliability of detection in a gas environment, a first three-way valve 230 and a second three-way valve 260 are respectively connected to the detection pipeline 210. The first three-way valve 230 is located between the air inlet 220 of the detection pipeline 210 and the flow switch 240, and the second three-way valve 260 is located between the flow switch 240 and the inflation pipeline 270. When needed, the gas in the detection pipeline 210 is diverted or its flow direction is adjusted. The two ends of the inflation pipeline 290 are respectively connected to the first three-way valve 230 and the second three-way valve 260. The inflation pipeline 290 can introduce gas from the first three-way valve 230 and send it to the appropriate position in the detection pipeline 210 through the second three-way valve 260. An air pump 280 is connected to the inflation pipeline 290 and actively draws gas from the incubator for detection, which is used to extract gas for detection in a low-pressure gas environment.
[0033] In this embodiment, the application employs a dual-branch design, which maintains the stability of the gas flow rate within the sensor cavity under different external gas supply environments, thereby ensuring the stability and reliability of the detection results. Specifically, the dual-branch design includes two functional gas intake paths: one branch is equipped with a flow switch 240 and a one-way valve 250, specifically designed for handling external high-pressure gas. The flow switch 240 can precisely control the flow rate of the incoming gas, preventing excessive flow from affecting the detection results, while the one-way valve 250 effectively prevents gas backflow, ensuring the unidirectional flow of gas and the continuity of the detection process. The other branch incorporates an air pump 280, whose main function is to actively extract gas from the incubator for detection. By flexibly adjusting the pumping speed of the air pump 280 and the limit value of the flow switch 240, the system can ensure that both branches have exactly the same flow rate during gas intake, thus creating a consistent and stable detection environment for the sensor under different detection conditions. Therefore, the dual-branch design of this gas path system not only improves the detection speed and efficiency but also ensures the stability and reliability of the detection results.
[0034] In one specific embodiment, when the air inlet 220 of the detection pipe 210 is connected to a cavity containing high-pressure gas, the air pump 280 is turned off and the flow switch 240 is adjusted to limit the flow rate of the high-pressure gas.
[0035] In one specific embodiment, when the air inlet 220 of the detection pipe 210 is connected to a cavity containing low-pressure gas, the air pump 280 is turned on to increase the flow rate of the low-pressure gas.
[0036] In one specific embodiment, the detection gas path system further includes a one-way valve 250, which is connected and disposed on the detection pipeline 210, located between the flow switch 240 and the second three-way valve 260. The flow direction of the medium in the one-way valve 250 is such that the inlet 220 of the detection pipeline 210 faces the outlet 2010 of the detection pipeline 210. The specific position of the one-way valve 250 between the flow switch 240 and the second three-way valve 260 ensures that the gas flow in the detection pipeline 210 is from the inlet 220 to the outlet 2010, enhancing the functionality and reliability of the gas path system, and effectively preventing backflow of gas in the pipeline, thus ensuring the unidirectional flow of gas and the accuracy of the detection process. In addition, the one-way valve 250 ensures stable transmission of gas along a predetermined path, effectively preventing detection errors or system malfunctions that may be caused by gas backflow.
[0037] In one specific embodiment, the inflation pipe 270 includes a carbon dioxide sensor 272 and an oxygen sensor 271. The inlet 273 of the oxygen sensor 271 is connected to the second three-way valve 260, and the outlet 274 is connected to the outlet 2010 of the carbon dioxide sensor 272. The outlet 274 of the carbon dioxide sensor 272 is connected to the outlet 2010 of the detection pipe 210. The inlet 273 of the oxygen sensor 271 is directly connected to the second three-way valve 260, while the outlet of the oxygen sensor 271 is connected to the outlet 274 of the carbon dioxide sensor 272, forming a relay process for gas transmission. After the carbon dioxide sensor 272 completes its detection task, its outlet 2010 is connected to the outlet 2010 of the detection pipe 210, allowing the gas detected sequentially by the two sensors to be smoothly discharged from the system.
[0038] In one specific embodiment, the detection gas circuit system further includes: a housing 100, which is a hollow sealed structure; a detection pipe 210, a first three-way valve 230, a second three-way valve 260, an air pump 280, a flow switch 240, an inflation pipe 290, and an inflation pipe 270 are disposed inside the housing 100; an air inlet and an air outlet are provided on the side wall of the housing 100; the air inlet is connected to and communicates with the air inlet 220 of the detection pipe 210; and the air outlet is connected to and communicates with the air outlet 2010 of the detection pipe 210. The housing 100 is a hollow, sealed structure that houses the detection pipe 210, the first three-way valve 230, the second three-way valve 260, the air pump 280, the flow switch 240, the inflation pipe 290, and the inflation pipe 270. An air inlet and an air outlet are provided on the side wall of the housing 100. These two outlets not only provide convenient channels for gas entry and exit but also ensure effective isolation between the system's internal and external environments. Specifically, the air inlet is tightly connected to and interconnected with the air inlet 220 of the detection pipe 210, allowing external gas to smoothly enter the detection system. The air outlet is seamlessly connected to the air outlet 2010 of the detection pipe 210, ensuring that the detected gas can be smoothly discharged from the system.
[0039] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.
Claims
1. A gas concentration detector gas path system, characterized in that, include: The system includes a detection pipeline, a first three-way valve, a second three-way valve, an air pump, a flow switch, an inflation pipeline, and a sensor assembly. The inlet end of the detection pipe is the air inlet, and the outlet end is the air outlet; The flow switch and the sensor assembly are respectively disposed on the detection pipe, and the flow switch is adjacent to the air inlet of the detection pipe; The first three-way valve and the second three-way valve are respectively connected and installed on the detection pipeline. The first three-way valve is located at the air inlet of the detection pipeline and between it and the flow switch. The second three-way valve is located between the flow switch and the sensor assembly. The two ends of the inflation pipe are respectively connected to the first three-way valve and the second three-way valve; The air pump is connected to the inflation pipe.
2. The gas concentration detector detection gas path system according to claim 1, characterized in that, When the air inlet of the detection pipe is connected to a cavity containing high-pressure gas, the air pump is turned off, and the flow switch is adjusted to limit the flow rate of the high-pressure gas.
3. The gas concentration detector detection gas path system according to claim 2, characterized in that, When the air inlet of the detection pipe is connected to a cavity containing low-pressure gas, the air pump is turned on to increase the flow rate of the low-pressure gas.
4. The gas concentration detector detection gas path system according to any one of claims 1-3, characterized in that, The detection gas circuit system also includes: a one-way valve; The one-way valve is connected and installed on the detection pipeline, located between the flow switch and the second three-way valve; The medium flow direction of the one-way valve is such that the air inlet of the detection pipe faces the air outlet of the detection pipe.
5. The gas concentration detector detection gas path system according to any one of claims 1-3, characterized in that, The sensor assembly includes: a carbon dioxide sensor and an oxygen sensor; The oxygen sensor’s inlet is connected to the second three-way valve, and its outlet is connected to the carbon dioxide sensor’s outlet. The outlet of the carbon dioxide is connected to the outlet of the detection pipe.
6. The gas concentration detector detection gas path system according to claim 1, characterized in that, The detection gas path system further includes: a housing; The shell is a hollow, sealed structure; The detection pipe, the first three-way valve, the second three-way valve, the air pump, the flow switch, the inflation pipe, and the sensor assembly are disposed inside the housing; The side wall of the housing is provided with an air inlet and an air outlet. The air inlet is connected to and communicates with the air inlet of the detection pipe, and the air outlet is connected to and communicates with the air outlet of the detection pipe.