A detection device based on an ammonia gas sensor

Abstract

This utility model relates to a detection device based on an ammonia sensor, which includes a shell with an internal cavity, a partition assembly, a detection module, a pretreatment module, and a display unit. The partition assembly includes a first partition and a second partition that sequentially divide the cavity into a filtration area, a detection area, and a control area along the gas flow direction. The first partition is made of a non-absorbent, breathable material and is located between the control area and the detection area, effectively buffering the direct impact of heat or cold sources from the control area on the detection area, and achieving stable temperature and humidity transmission. The second partition is made of a non-absorbent, impermeable material and is located between the detection area and the filtration area. The detection module includes an ammonia sensor located within the detection area. The pretreatment module includes a filter device located in the filtration area and a temperature and humidity control device located in the control area. After the gas to be detected is filtered through the filtration area, water vapor, dust, and other interfering substances in the gas can be effectively removed.

Description

Technical Field

[0001] This utility model relates to the field of detection device technology, specifically to a detection device based on an ammonia gas sensor. Background Technology

[0002] Ammonia (NH3), an important gas widely used in many fields such as chemical engineering, agriculture, refrigeration, and environmental protection, is inherently highly irritating and toxic. Exposure to high concentrations of ammonia can cause severe health hazards, and ammonia also poses a risk of explosion. Therefore, accurate detection of ammonia concentrations is crucial for industrial safety, environmental monitoring, animal husbandry, and medical applications.

[0003] However, in practical applications, existing ammonia-based detection devices face numerous technical challenges. On one hand, the performance parameters of ammonia sensors, such as sensitivity, response speed, and selectivity, are affected by changes in ambient temperature and humidity, significantly reducing the accuracy and reliability of the detection results. On the other hand, in agricultural fields, such as livestock farming, and in industrial waste gas monitoring, NH3 often coexists with water vapor, dust, and other substances. This complex gaseous environment can easily interfere with the accuracy of ammonia sensor measurements, further complicating the detection of ammonia concentrations.

[0004] The above background information is provided only to aid in understanding the concept and technical solution of this application. It does not necessarily belong to the prior art of this application, nor does it necessarily provide technical guidance. In the absence of clear evidence that the above information was disclosed before the filing date of this application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Utility Model Content

[0005] The purpose of this invention is to provide a novel detection device based on an ammonia sensor.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] This utility model provides a detection device based on an ammonia gas sensor, which includes:

[0008] The housing has an internal cavity, and the housing is provided with an air inlet and an air outlet communicating with the cavity;

[0009] A partition assembly includes a first partition and a second partition, the first partition and the second partition being spaced apart and sequentially dividing the receiving cavity along the gas flow direction into a filtration area, a detection area and a control area, wherein:

[0010] The air inlet is located on the housing of the filter area;

[0011] The air outlet is located on the housing of the control area;

[0012] The first partition is made of a non-absorbent, breathable material and is disposed between the detection area and the control area;

[0013] The second partition is made of a non-absorbent, airtight material and is disposed between the filtration area and the detection area. The second partition has through holes that allow gas to pass through.

[0014] The detection module includes an ammonia sensor located within the detection area for detecting the concentration of ammonia.

[0015] The pretreatment module includes a filter device located in the filtration area for purifying the gas, and a temperature and humidity control device located in the control area for adjusting environmental parameters.

[0016] The human-computer interaction module includes a display unit disposed on the surface of the housing, the display unit being electrically connected to the gas sensor for visually displaying ammonia concentration detection data.

[0017] In some embodiments, the non-absorbent breathable material is a nonwoven fabric.

[0018] In some embodiments, the non-absorbent, airtight material is a metal or a plastic.

[0019] In some embodiments, the detection device further includes a gas circulation unit, which includes a circulating air pump located in the filtration area and a three-way air inlet pipe connected to the air inlet end of the circulating air pump. The air outlet end of the circulating air pump is connected to the filtration device. The three-way air inlet pipe has a first air inlet branch pipe communicating with the air inlet and a second air inlet branch pipe communicating with the filtration area.

[0020] In some embodiments, a first one-way valve is provided on the first intake manifold, the first one-way valve being configured to allow gas to flow only along the first intake manifold toward the filter device.

[0021] In some embodiments, a second one-way valve is provided on the second intake manifold, the second one-way valve being configured to allow gas to flow only along the second intake manifold toward the filter device.

[0022] In some embodiments, the detection device further includes a cleanliness detection device for monitoring filtration effectiveness.

[0023] In some embodiments, the detection device further includes a connecting pipe connected to the through hole, the connecting pipe having a third one-way valve configured to allow gas to flow only from the filtration area to the detection area.

[0024] In some embodiments, the detection device further includes an exhaust pipe connected to the outlet, the exhaust pipe having a fourth one-way valve configured to allow gas to flow only from the control area toward the external environment.

[0025] Furthermore, the detection device also includes an air pump connected to the exhaust pipe.

[0026] In some embodiments, the detection area is provided with a slot, and the ammonia sensor is installed in the slot in a pluggable manner.

[0027] In some embodiments, the detection device further includes a thermometer and a hygrometer disposed in the detection area or the control area.

[0028] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0029] This invention divides the receiving cavity into three independent functional areas: a filtration area, a detection area, and a control area, using a first and second partition. The gas to be detected first undergoes pretreatment in the filtration area, effectively removing interfering substances such as water vapor and dust, which helps improve the detection accuracy of the ammonia sensor. The control area is separated from the detection area by a first partition made of non-absorbent, breathable material. This not only effectively buffers the impact of heat or cold sources but also ensures stable temperature and humidity transmission, guaranteeing the stability of the detection environment. This partitioned design ensures both the accuracy of gas detection and enhances the environmental adaptability and reliability of the device. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the detection device provided in Example 1;

[0031] Figure 2 Top perspective view of the detection device provided in Example 1;

[0032] Figure 3 A front perspective view of the detection device provided in Example 1;

[0033] Figure 4 A schematic diagram of the gas circulation unit provided in Example 1;

[0034] The components are: 1. Housing; 11. Filtering area; 12. Detection area; 13. Control area; 14. Slot;

[0035] 21. First partition; 22. Second partition;

[0036] 3. Ammonia gas sensor;

[0037] 4. Gas circulation unit; 41. Filter device; 42. Circulating air pump; 43. Three-way air inlet pipe; 431. First air inlet branch pipe; 432. Second air inlet branch pipe; 44. First one-way air valve; 45. Second one-way air valve;

[0038] 51. Connecting pipe; 52. Third one-way valve;

[0039] 61. Exhaust pipe; 62. Air pump; 63. Fourth one-way valve;

[0040] 71. Temperature and humidity control device; 72. Cleanliness detection device. Detailed Implementation

[0041] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0042] In the description of the embodiments of this utility model, it should be understood that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are only for the purpose of facilitating the description of the embodiments of this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of this utility model.

[0043] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0044] In this embodiment of the invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0045] The foregoing disclosure provides many different implementations or examples for carrying out different structures of the embodiments of this utility model. To simplify the disclosure of the embodiments of this utility model, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the embodiments of this utility model. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of this utility model; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0046] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0047] Example 1

[0048] A detection device based on an ammonia gas sensor, such as Figures 1 to 4As shown, it includes a housing 1, a partition assembly, a detection module, a pretreatment module, and a human-machine interface module. The housing 1 has an internal cavity, and an air inlet and an air outlet communicating with the cavity are provided on the housing 1. The partition assembly includes a first partition 21 and a second partition 22, which are spaced apart and sequentially divide the cavity along the gas flow direction into a filtration area 11, a detection area 12, and a control area 13. The air inlet is located on the housing 1 of the filtration area 11, and the air outlet is located on the housing 1 of the control area 13. The first partition 21 is made of a non-absorbent, breathable material and is located between the detection area 12 and the control area 13. The second partition 22 is made of a non-absorbent, impermeable material and is located between the filtration area 11 and the detection area 12. The second partition 22 has through holes that allow gas to pass through. The detection module includes an ammonia sensor 3 located in the detection area 12 for detecting the concentration of ammonia. The pretreatment module includes a filter device 41 located in the filtration zone 11 for purifying the gas, and a temperature and humidity control device 71 located in the control zone 13 for adjusting environmental parameters. The human-machine interface module includes a display unit located on the surface of the housing 1. The display unit is electrically connected to the gas sensor and is used to visually display ammonia concentration detection data, as detailed in existing technologies.

[0049] The first partition 21 and the second partition 22 divide the receiving cavity into three functional areas along the gas flow direction: a filtration area 11, a detection area 12, and a control area 13. After the gas to be tested enters the filtration area 11, it undergoes pretreatment to remove interfering substances such as water vapor and dust, thereby improving detection accuracy. The control area 13 is equipped with a temperature and humidity control device 71, including a heating element, a cooling element, a humidification module, a dehumidification module, a thermometer, and a hygrometer, which can dynamically adjust environmental parameters; specific details can also be found in existing technologies. When the temperature and humidity control device 71 performs heating / cooling or humidification / dehumidification, the first partition 21, made of non-absorbent, breathable material, acts as a barrier between the detection area 12 and the control area 13. This not only prevents the airflow from directly impacting the ammonia sensor 3 but also achieves a gradual and stable transfer of temperature and humidity, avoiding fluctuations in the detection environment due to sudden changes in temperature and humidity. This buffered control design ensures detection stability while extending the sensor's lifespan. This structure ensures that the ammonia sensor 3 operates under relatively constant temperature and humidity conditions, thus contributing to improved accuracy and reliability of the detection data.

[0050] Preferably, the non-absorbent, breathable material is non-woven fabric. Non-woven fabric has porous, breathable properties, effectively buffering the impact of hot / cold airflow in the control area 13, allowing temperature and humidity to be transferred to the detection area 12 gradually and evenly, preventing the sensor from being affected by sudden environmental changes in detection accuracy. Furthermore, non-woven fabric is typically made of polypropylene (PP) or polyester (PET), which does not absorb ammonia or other analyte gases, thus avoiding additional contamination and ensuring the accuracy of sensor data. Its hydrophobic properties prevent condensation penetration while allowing gas molecules to pass freely, maintaining humidity stability in the detection area 12 and preventing moisture interference with the ammonia sensor 3. The non-absorbent, impermeable material is a metal or plastic, including but not limited to stainless steel, aluminum alloy, copper or copper-plated alloy, PP, polyethylene (PE), polycarbonate (PC), etc. Metal materials are impermeable, strictly isolating the detection area 12 from the filter area 11, and have almost no adsorption of gases such as ammonia, thus improving detection accuracy.

[0051] Due to the specific characteristics of certain test gases, a single filtration is insufficient to effectively remove interfering substances. The applicant further addresses this by implementing a cleanliness detection device 72 and a gas circulation unit 4 to achieve dynamic, multi-stage filtration control, ensuring that the gas pre-treated to meet standards before entering the testing area 12. Specifically, the cleanliness detection device 72 is located in the filtration area 11, monitoring parameters such as particulate matter concentration and gas composition in the filtration area 11 in real time; its specific structure can be referenced from existing technologies. The gas circulation unit 4 includes a circulating air pump 42 located in the filtration area 11 and a three-way inlet pipe 43 connected to the inlet end of the circulating air pump 42. The outlet end of the circulating air pump 42 is connected to the filter device 41. The three-way inlet pipe 43 has a first inlet branch pipe 431 connected to the inlet and a second inlet branch pipe 432 connected to the filtration area 11. The first intake branch pipe 431 is equipped with a first one-way valve 44, which is configured to allow gas to flow only along the first intake branch pipe 431 toward the filter device 41. The second intake branch pipe 432 is equipped with a second one-way valve 45, which is configured to allow gas to flow only along the second intake branch pipe 432 toward the filter device 41. The filter device 41, in accordance with existing technology, can integrate multi-stage filter elements, such as hydrophobic membranes, activated carbon, and HEPA (high-efficiency particulate air filter), to specifically remove different interfering substances.

[0052] Initial filtering stage:

[0053] Open the first one-way valve 44 and close the second one-way valve 45. External gas enters the filter device 41 through the first inlet branch pipe 431 for initial filtration. After filtration, the gas enters the filtration area 11 and is analyzed in real time by the cleanliness detection device 72.

[0054] Circulating filtration stage (if the test fails):

[0055] Close the first one-way valve 44, open the second one-way valve 45, and start the circulating air pump 42. The substandard gas flows back to the filter device 41 through the second inlet branch pipe 432 for secondary or multiple filtrations until the cleanliness meets the standard.

[0056] Qualified gas passes:

[0057] The qualified gas enters the downstream detection area 12 to ensure detection accuracy.

[0058] Furthermore, the detection device also includes a connecting pipe 51 connected to the through hole, and a third one-way valve 52 is provided on the connecting pipe 51. The third one-way valve 52 is configured to allow gas to flow only from the filtration zone 11 to the detection zone 12. When the gas cleanliness of the filtration zone 11 meets the standard, the third one-way valve 52 is opened to allow gas to enter the detection zone 12 through the connecting pipe 51 for detection.

[0059] The ammonia sensor 3 includes, but is not limited to, an electrochemical ammonia sensor, a semiconductor ammonia sensor, or an optical ammonia sensor, as can be found in existing technologies. To facilitate the installation of the ammonia sensor 3, a slot 14 is provided on the housing of the detection area 12, and the ammonia sensor 3 is installed in the slot 14 in a pluggable manner for easy replacement.

[0060] The detection device also includes an exhaust pipe 61 connected to the air outlet. The exhaust pipe 61 is equipped with a fourth one-way valve 63 and an air pump 62. The fourth one-way valve 63 is configured to allow gas to flow only from the control area 13 towards the external environment. The air pump 62 actively draws air to ensure that the detected exhaust gas is quickly discharged to the external environment, thus preventing the accumulation of exhaust gas within the device and affecting the accuracy of subsequent detections. Furthermore, the air pump 62 provides a stable airflow, forming a dynamic balance with the air inlet, thereby eliminating sensor response drift caused by air pressure fluctuations and further ensuring data reliability.

[0061] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. An ammonia gas sensor-based detection device, characterized by, include: The housing (1) has an internal cavity, and the housing (1) is provided with an air inlet and an air outlet communicating with the cavity; The partition assembly includes a first partition (21) and a second partition (22), the first partition (21) and the second partition (22) being spaced apart and sequentially dividing the receiving cavity along the gas flow direction into a filtration area (11), a detection area (12) and a control area (13), wherein: The air inlet is located on the housing of the filter area (11); The air outlet is located on the housing of the control area (13); The first partition (21) is made of a non-absorbent, breathable material and is disposed between the detection area (12) and the control area (13); The second partition (22) is made of a non-absorbent, airtight material and is disposed between the filtration area (11) and the detection area (12). The second partition (22) has through holes that allow gas to pass through. The detection module includes an ammonia sensor (3) located in the detection area (12) for detecting the concentration of ammonia. The pretreatment module includes a filter device (41) disposed in the filter area (11) for purifying the gas, and a temperature and humidity control device (71) disposed in the control area (13) for adjusting environmental parameters. The human-computer interaction module includes a display unit disposed on the surface of the housing (1), the display unit being electrically connected to the ammonia sensor (3) for visually displaying ammonia concentration detection data.

2. The ammonia gas sensor-based detection device according to claim 1, wherein The non-absorbent, breathable material is a non-woven fabric; And / or, the non-absorbent, airtight material is a metal or a plastic.

3. The ammonia gas sensor-based detection device of claim 1, wherein, The detection device further includes a gas circulation unit (4), which includes a circulating air pump (42) located in the filtration area (11) and a three-way air inlet pipe (43) connected to the air inlet end of the circulating air pump (42). The air outlet end of the circulating air pump (42) is connected to the filtration device (41). The three-way air inlet pipe (43) has a first air inlet branch pipe (431) connected to the air inlet and a second air inlet branch pipe (432) connected to the filtration area (11).

4. The ammonia gas sensor-based detection device according to claim 3, wherein The first intake branch pipe (431) is provided with a first one-way valve (44), which is configured to allow gas to flow only along the first intake branch pipe (431) toward the filter device (41). And / or, the second intake branch pipe (432) is provided with a second one-way valve (45), which is configured to allow gas to flow only along the second intake branch pipe (432) toward the filter device (41).

5. The ammonia gas sensor-based detection device of claim 1, wherein, The detection device also includes a cleanliness detection device (72) for monitoring the filtration effect.

6. The ammonia gas sensor-based detection device of claim 1, wherein, The detection device further includes a connecting pipe (51) connected to the through hole, and the connecting pipe (51) is provided with a third one-way gas valve (52), which is configured to allow gas to flow only from the filter area (11) to the detection area (12).

7. The detection device based on an ammonia sensor according to claim 1, characterized in that, The detection device also includes an exhaust pipe (61) connected to the air outlet, and the exhaust pipe (61) is provided with a fourth one-way valve (63), which is configured to allow gas to flow only from the control area (13) to the external environment.

8. The ammonia gas sensor-based detection device of claim 7, wherein, The detection device also includes an air pump (62) connected to the exhaust pipe (61).

9. The ammonia gas sensor-based detection device of claim 1, wherein, The detection area (12) is provided with a slot (14), and the ammonia sensor (3) is installed in the slot (14) in a pluggable manner.

10. The ammonia gas sensor-based detection device of claim 1, wherein, The detection device also includes a thermometer and a hygrometer located in the detection area (12) or the control area (13).

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