Gas sensor detection device

Abstract

The utility model discloses a gas sensor detection device which comprises a base, an electrode, a solid electrolysis ring and a ceramic filter, the solid electrolysis ring is arranged in the base; the electrode is arranged in the solid electrolysis ring and is connected with the solid electrolysis ring in a hard pressure contact manner; the electrodes comprise an induction electrode, a counter electrode and a reference electrode; the sensing electrode, the counter electrode and the reference electrode are separated through ribs in the base, and graphene layers and superlattice silver coatings are sequentially attached to the surfaces of the sensing electrode, the counter electrode and the reference electrode; the two ends of the ceramic filter are connected with ribs in the base to form an air inlet channel, and the outer side face of the ceramic filter abuts against the induction electrode. Through type gas detection is adopted, the whole gas flow channel is stable, detection data are more accurate, the graphene layer and the superlattice silver plating layer are sequentially attached to the surface of the electrode, the graphene layer has excellent conductivity and high temperature resistance, the superlattice silver plating layer increases the contact area with gas, and the detection precision is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a gas sensor technical field, especially a gas sensor detection device. BACKGROUND

[0002] Atmospheric environment monitoring demand growth: along with the country's attention to safety and the improvement of social environmental protection consciousness, the demand of atmospheric environment and pollutant monitoring equipment increases rapidly, and the atmospheric monitoring industry also develops rapidly. As one of the important tools of atmospheric environment monitoring, the performance and reliability of electrochemical gas sensor have important influence on the accuracy of monitoring results.

[0003] Limitations of existing electrochemical gas sensors:

[0004] Affected by temperature and humidity: traditional electrochemical gas sensors are easily affected by environmental temperature and humidity, resulting in decreased detection accuracy. Especially in extreme temperature conditions (such as below-20℃ or above 50℃), the sensor may be permanently and irreversibly damaged, thereby causing false positives or false negatives and other problems;

[0005] Traditional gas inlet detection uses end face gas inlet mode detection, and uneven gas flow can easily cause detection errors;

[0006] Narrow temperature resistance range: the temperature resistance range of general electrochemical gas sensors is only 0-40℃, and the detection accuracy and safety of the sensor cannot be guaranteed in high temperature environment, which limits its application in high temperature places;

[0007] Single gas detection: most electrochemical gas sensors can only detect single gas, and need to replace the sensor when detecting different gases. The replacement process is relatively cumbersome, and may cause gas leakage between the sensor and the equipment, resulting in detection data deviation, which is not convenient to use and is inconvenient to maintain;

[0008] Short service life: due to the above problems, in order to ensure effective monitoring, the service life of electrochemical gas sensor is usually not more than one year, which needs to be replaced frequently, increasing the use cost. INVENTION CONTENTS

[0009] In view of the problems existing in the prior art, the utility model provides a gas sensor detection device.

[0010] In order to realize the above purpose, the utility model technical scheme is as follows:

[0011] The utility model provides a gas sensor detection device, which comprises:

[0012] Base, electrode, solid electrolytic ring, ceramic filter sheet;

[0013] The solid electrolytic ring is arranged in the base;

[0014] The electrode is arranged inside the solid electrolytic ring and is connected with the solid electrolytic ring by hard pressure contact;

[0015] The electrode comprises an inductive electrode, a counter electrode and a reference electrode.

[0016] The inductive electrode, the counter electrode and the reference electrode are separated by the internal rib of the base, and the surfaces of the inductive electrode, the counter electrode and the reference electrode are sequentially attached with a graphene layer and a superlattice silver plating layer.

[0017] The ceramic filter sheet is connected with the internal rib of the base at both ends to form an air inlet channel, and the outer side surface is abutted with the inductive electrode.

[0018] Preferably, the gas sensor detection device further comprises a ceramic sheet one and a ceramic sheet two.

[0019] The ceramic sheet one is arranged in the space formed by the counter electrode and the internal rib of the base.

[0020] The ceramic sheet two is arranged in the space formed by the reference electrode and the internal rib of the base.

[0021] Preferably, the gas sensor detection device further comprises a sensor upper cover, a filter membrane, a rubber pad and a sealing glue layer.

[0022] The sensor upper cover is arranged on the base.

[0023] The sealing glue layer, the rubber pad and the filter membrane are sequentially arranged at the top end of the base, and the middle portions of the sealing glue layer and the rubber pad are further provided with openings.

[0024] Preferably, the top of the sensor upper cover is provided with a luer joint, and the luer joint is connected with the air inlet channel.

[0025] Preferably, the solid electrolytic ring comprises a ceramic ring and a PEO electrolyte film attached to the outside of the ceramic ring.

[0026] Preferably, the ceramic filter sheet is provided with a plurality of air holes.

[0027] Preferably, the outer wall of the base is further provided with threads.

[0028] Preferably, the filter membrane adopts a high molecular PTFE filter core for filtering water vapor and dust in the air, and the base is made of PET.

[0029] The technical scheme of the utility model has the following beneficial effects:

[0030] Through type gas detection: the utility model discloses a through type gas detection, unlike traditional end face detection, the whole airflow passage is stable, the contact of gas and electrode is more sufficient and uniform, reduces the detection error caused by uneven gas flow, thereby improve the accuracy and stability of detection data;

[0031] Electrode surface treatment optimization: the electrode surface is attached with graphene layer and superlattice silver plating layer in turn, the graphene layer has excellent conductivity and high temperature resistance, adopts superlattice plating film technology, can adjust plating film density according to different gas, the superlattice silver plating layer increases the contact area with gas, these optimization measures improve the sensitivity and reaction efficiency of electrode, further improve the detection precision;

[0032] Enhance high temperature resistance: the synergistic effect of graphene layer and superlattice silver plating layer makes the electrode still maintain good conductivity and stability under high temperature environment, expands the temperature resistance range of sensor, makes it can work normally under more extensive temperature conditions, reduces the sensor damage and false alarm problem caused by high temperature;

[0033] Prolong service life: solid electrolytic ring adopts ceramic powder sintering to form ceramic ring, and the outside is plated with PEO (polyethylene oxide) electrolyte film, the improvement of the structure and material improves the stability and durability of the electrolytic ring;The setting of ceramic filter sheet effectively filters the impurities in the air, reduces the pollution of sensitive components such as electrode;The reasonable connection and fixation between each component, such as the hard pressure contact of electrode and solid electrolytic ring, also enhance the overall structural stability of sensor, thereby prolonging the service life of sensor, reducing the replacement frequency and use cost;

[0034] Improve the convenience of use: quick connection structure: the top of the sensor cover is provided with a luer joint, and the outer wall of the base is provided with a screw thread, these quick connection structures make the connection of sensor and external pipeline or other equipment more convenient and fast, simplify the installation and maintenance process, improve the use efficiency;

[0035] Reduce maintenance and replacement cost: due to the high detection accuracy, good stability, strong high temperature resistance and long service life of the sensor, the frequency and cost of maintenance and replacement are reduced, the use cost of the user is reduced, and the economic benefit is improved. BRIEF DESCRIPTION OF DRAWINGS

[0036] Fig. 1 It is the schematic diagram of explosion structure of the utility model;

[0037] Fig. 2 It is the installation schematic diagram of electrode, solid electrolytic ring, ceramic filter sheet and two ceramic sheets in the base of the utility model;

[0038] Fig. 3 It is the air inlet schematic diagram of the utility model adopting through type gas detection. DETAILED DESCRIPTION

[0039] Embodiments of the present application are described below in detail with reference to the accompanying drawings, wherein the same or similar numerals represent the same or similar elements or elements having the same or similar functions throughout the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0040] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like 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, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0041] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0042] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] In the present application, unless otherwise specifically defined and limited, the first feature "above" or "below" the second feature can include the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the first feature "above", "above" and "above" the second feature includes the first feature directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes the first feature directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0044] Referring to Figs. 1 to 3 The utility model provides a kind of gas sensor detection device, comprising:

[0045] Base 8, electrode 6, solid electrolytic ring 7, ceramic filter sheet 9;

[0046] The solid electrolytic ring 7 is arranged inside the base 8, and the material of the base 8 is PET (polyethylene terephthalate). The solid electrolytic ring 7 is formed by sintering ceramic powder into a ceramic ring inside and coating PEO (polyethylene oxide) electrolyte film outside, forming an electrolyte ring.

[0047] The ceramic ring is formed by sintering ceramic powder, has excellent chemical stability and high-temperature resistance. It can resist the corrosion of corrosive substances that may be generated during gas detection, protect the electrolyte film and electrode, and prolong the service life of the sensor. The PEO (polyethylene oxide) electrolyte film has good ion conduction performance and can quickly conduct ions. This helps to improve the electrochemical reaction speed and efficiency between the electrode and the gas, enabling the sensor to more sensitively detect changes in gas concentration and improve the response speed and accuracy of detection. The structural design and material selection of the ceramic ring and PEO electrolyte film effectively improve the ion conduction performance, chemical stability, detection performance, and adaptability of the sensor, providing important protection for achieving high precision, high stability, and high reliability of gas detection.

[0048] The electrode 6 is arranged inside the solid electrolytic ring 7 and connected to the solid electrolytic ring through hard pressure contact. The hard pressure contact makes the contact between the electrode and the solid electrolytic ring more tight, which is conducive to the transmission of ions between the electrode and the electrolytic ring, ensuring the smooth progress of the electrochemical reaction. It provides stable fixation and support for the electrode 6. It ensures the stable position of the electrode inside the sensor, prevents the electrode from shifting or falling off during use, and ensures the normal operation and long-term stability of the sensor.

[0049] The electrode 6 includes a sensing electrode 601, a counter electrode 602, and a reference electrode 603. The sensing electrode 601 is the main electrode for gas detection and directly contacts the gas to be detected, undergoes electrochemical reaction, and generates current signals related to the gas concentration for detecting the concentration of the gas. The counter electrode 602 cooperates with the sensing electrode 601 to participate in the electrochemical reaction, forms a current loop, and maintains the balance and stability of the electrochemical reaction. The reference electrode 603 provides a stable potential reference for calibrating and compensating the potential change in the electrochemical reaction, ensuring the accuracy and consistency of the detection signal. The sensing electrode 601, the counter electrode 602, and the reference electrode 603 are electrically connected to the external PCBA board.

[0050] The sensing electrode 601, 602, the reference electrode 603 are separated by the internal rib position 801 of the base, which makes the electrodes independent of each other, avoids direct contact and interference between the electrodes, and provides stable fixation and support for the electrodes, ensuring the stable position of the electrodes in the sensor. The surface of the electrode 6 is sequentially attached with a graphene layer and a superlattice silver plating layer 601A. The graphene layer has excellent conductivity and high-temperature resistance, which can improve the conductivity of the electrode and the stability of the electrode in a high-temperature environment. In the preparation process of the electrode 6, the ceramic powder is first processed into a corresponding shape by powder metallurgy, and then solidified by high-temperature sintering at 1300 DEG C to form a fixed size. The surface of the electrode is coated with a graphene film by superlattice plating technology. The silver film surface can react with oxygen or other gases in the air, and the graphene film can ensure the conductivity and heat resistance of the electrode surface, thereby increasing the stability of the electrode in a high-temperature environment and ensuring the stability of the gas flow in a high-temperature detection.

[0051] The ceramic filter sheet 9 is connected to the internal rib position 801 of the base 8 at both ends to form an air inlet channel 86, and the outer side surface is in abutment with the sensing electrode 601. The air inlet channel 86 provides a channel for the gas to be detected to enter the inside of the sensor. At the same time, the ceramic filter sheet 9 is provided with a plurality of air holes, and the ceramic filter sheet 9 also has a filtering effect, which can effectively remove dust, particulate matter and other impurities in the air, prevent these impurities from polluting sensitive components such as electrodes, and ensure the accuracy and reliability of the sensor detection. The outer side surface is in abutment with the sensing electrode 601, which further ensures the full contact of the gas with the sensing electrode and improves the detection efficiency.

[0052] Further, the gas sensor detection device further comprises a ceramic sheet one 5 and a ceramic sheet two;

[0053] The ceramic sheet one 5 is arranged in the space formed by the counter electrode 602 and the internal rib position 801 of the base 8.

[0054] The ceramic sheet two is arranged in the space formed by the reference electrode 603 and the internal rib position 801 of the base. The ceramic material has good high-temperature resistance, chemical corrosion resistance and mechanical strength, and the ceramic sheet can protect the electrode to a certain extent, prevent the electrode from being damaged in harsh environments such as high temperature, corrosive gas or mechanical stress, and prolong the service life of the electrode. The ceramic sheet one 5 and the ceramic sheet two reduce the interference of external factors on the electrode, so that the electrode can work in a relatively stable and controlled environment, thereby improving the detection stability and accuracy of the sensor and reducing the detection error.

[0055] Further, the gas sensor detection device further comprises a sensor upper cover 1, a filter membrane 2, a rubber pad 3 and a sealing layer 4.

[0056] The sensor upper cover 1 is arranged on the base 8, is formed by injection molding of PC (polycarbonate), can effectively protect the key components such as internal electrode, solid electrolytic ring, ceramic filter sheet, prevents the damage of external environment pollution, dust, moisture and the like to the inside of the sensor, and ensures the stability and reliability of the sensor.

[0057] The glue sealing layer 4 and the rubber pad 3 are sequentially arranged at the top end of the base 8, and the middle parts of the glue sealing layer 4 and the rubber pad 3 are also provided with openings.

[0058] The filter membrane 2 is formed by a high-molecular PTFE (polytetrafluoroethylene) filter core, is used for filtering water vapor and dust in air, prevents the pollution and interference of these impurities on sensitive components such as electrodes, and ensures the accuracy and reliability of sensor detection; the rubber pad 3 plays a sealing role, can effectively reduce the leakage of gas in the inside of the sensor, and improves the air tightness of the sensor. Meanwhile, the rubber pad also has a certain buffering effect, can absorb and alleviate the influence of external vibration or impact on the internal components of the sensor, and protects the structural stability of the sensor; the glue sealing layer 4 fixes the components such as the electrode 6, the solid electrolytic ring 7 and the ceramic filter sheet 9 in the inside of the sensor by the glue pouring mode, simultaneously plays a sealing role, prevents the leakage of gas from the inside of the sensor, and ensures the air tightness and stability of the sensor.

[0059] The top of the sensor upper cover 1 is provided with a luer joint; the luer joint is connected with the air inlet channel 86 formed by the ceramic filter sheet 9 and the internal rib 801 of the base, and the luer joint provides an interface for the detected gas to enter the inside of the sensor. The design of the luer joint enables the sensor to be conveniently connected with external pipelines, realizes the introduction and detection of gas.

[0060] The outer wall of the base 8 is also provided with threads, can ensure the quickness of the sensor when connected with other components, and is convenient to install.

[0061] The working principle of the utility model is as follows:

[0062] The atmospheric environment air enters the air inlet channel 86 in the inside of the sensor through the sensor upper cover 1, the gas contacts the sensing electrode 601 through the ceramic sheet 9, an oxidation reaction occurs between the gas and the sensing electrode, electrons are generated, the electrons are connected with the PCBA board through the end of the sensing electrode, the electrons enter the counter electrode 602 through the PCBA board connection, the electrons of the counter electrode 602 form a reduction reaction with electrolyte ions, and an electric current is formed between the sensing electrode 601 and the counter electrode 602, and the gas concentration in the air can be judged according to the size of the electric current.

[0063] The above merely describes preferred embodiments of the present application, and is not intended to limit the patent scope of the present application, and any equivalent structural transformation or direct / indirect application in other related technical fields under the inventive concept of the present application, as described in the present application specification and drawings, is included in the patent protection scope of the present application.

Claims

1. A gas sensor detection device, characterized by, Include: Base, electrode, solid electrolytic ring, ceramic filter sheet; The solid electrolytic ring is arranged inside the base; The electrode is arranged inside the solid electrolytic ring and is connected with the solid electrolytic ring by hard pressure contact; The electrode includes an induced electrode, a counter electrode and a reference electrode; The induced electrode, the counter electrode and the reference electrode are separated by the internal rib of the base, and the surfaces of the induced electrode, the counter electrode and the reference electrode are sequentially attached with a graphene layer and a superlattice silver plating layer; The ceramic filter sheet is connected with the internal rib of the base at both ends to form an air inlet channel, and the outer side surface is also in abutment with the induced electrode.

2. The gas sensor detection device according to claim 1, characterized by The gas sensor detection device further comprises a ceramic sheet one and a ceramic sheet two; The ceramic sheet one is arranged in the space formed by the counter electrode and the internal rib of the base; The ceramic sheet two is arranged in the space formed by the reference electrode and the internal rib of the base.

3. The gas sensor detection device according to claim 1, characterized by The gas sensor detection device further comprises a sensor upper cover, a filter membrane, a rubber pad and a sealing glue layer; The sensor upper cover is arranged on the base; The sealing glue layer, the rubber pad and the filter membrane are sequentially arranged at the top end of the base, and the middle parts of the sealing glue layer and the rubber pad are also provided with openings.

4. The gas sensor detection device according to claim 3, characterized by The top of the sensor upper cover is provided with a luer joint; the luer joint is connected with the air inlet channel.

5. The gas sensor detection device according to claim 1, characterized by The solid electrolytic ring comprises a ceramic ring and a PEO electrolyte film attached to the outside of the ceramic ring.

6. The gas sensor detection device according to claim 1, characterized by A plurality of air holes are arranged on the ceramic filter sheet.

7. The gas sensor detection device according to claim 4, characterized by A screw thread is further arranged on the outer wall of the base.

8. The gas sensor detection device according to claim 3, characterized by The filter membrane adopts a high molecular PTFE filter core for filtering water vapor and dust in the air, and the base is made of PET.

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