Gas detector, electronic equipment and vehicle

Abstract

The utility model relates to a gas detector, electronic equipment and a vehicle, in the gas detector, a detection assembly used for detecting gas is arranged in a gas chamber, a filter assembly is connected to a shell body, and the filter assembly is used for filtering impurities in the gas entering the gas chamber along a gas inlet. According to the detection assembly, impurities of gas entering the gas chamber can be filtered, so that the purity of the gas entering the gas chamber is improved, the damage of the impurities to the detection assembly after long-term use is avoided, and the detection stability of the detection assembly is ensured.

Description

Technical Field

[0001] The present application relates to the field of vehicle-mounted electronic technology, and in particular to a gas detector, electronic equipment, and a vehicle. Background Art

[0002] The alcohol sensor is a testing tool used to detect the alcohol content in human exhaled gas. It is also used by traffic police to detect whether a driver has been drinking and how much they have drunk when enforcing the law. It can effectively avoid traffic accidents. It can also be used in some high-risk areas or areas where working under the influence of alcohol is prohibited.

[0003] In the existing technology, the gas entering the alcohol sensor contains a lot of impurities. Impurities such as moisture and particulate matter in the gas will enter the air chamber of the alcohol sensor. After long-term use, it will affect the detection parts in the air chamber, and thus affect the detection stability of the alcohol sensor. Utility Model Content

[0004] The embodiments of the present application provide a gas detector, an electronic device, and a vehicle, which improve the test accuracy of the gas detector to at least partially solve the above-mentioned technical problems.

[0005] In order to achieve the above object, according to a first aspect of the present application, a gas detector is provided, comprising:

[0006] a shell body having an air chamber and an air inlet;

[0007] A detection component is located in the gas chamber and is used to detect the gas;

[0008] The filter assembly is connected to the shell body and is used to filter impurities in the gas entering the air chamber along the air inlet.

[0009] Optionally, the filter assembly includes:

[0010] a first filter element, at least partially blocking the air inlet;

[0011] The first filter element has a first filter portion, and the first filter portion is used for gas to pass through.

[0012] Optionally, the first filter portion is configured as a hole structure.

[0013] Optionally, the inner diameter of the pore structure is between 0.9 μm and 2.5 μm.

[0014] Optionally, the filter assembly further comprises:

[0015] a second filter element, located between the first filter element and the detection component;

[0016] Wherein, the second filter element at least partially blocks the air inlet, and is used to filter impurities in the gas passing along the first filter portion.

[0017] Optionally, the second filter element is configured as a waterproof and breathable membrane.

[0018] Optionally, the shell body includes:

[0019] a base having an opening;

[0020] a sealing member connected to the base and closing the opening;

[0021] The air inlet is formed to the sealing member; and the second filter member is connected to a side surface of the sealing member facing the air chamber.

[0022] Optionally, the air inlet has an air inlet direction for allowing the gas to pass through.

[0023] Optionally, the air intake direction is parallel to the central axis of the base.

[0024] Optionally, it also includes:

[0025] a mounting portion formed on or connected to the bottom inner wall surface of the base;

[0026] The detection assembly includes a substrate;

[0027] Wherein, at least a portion of the substrate is connected to the mounting portion.

[0028] Optionally, the mounting portion is configured as a groove structure;

[0029] At least a portion of the substrate is located in the groove structure, and a sidewall surface of the substrate abuts against an inner sidewall surface of the groove structure.

[0030] Optionally, the detection component further includes:

[0031] The gas-sensitive layer structure is formed on the substrate and is used for gas detection.

[0032] Optionally, the gas-sensitive layer structure is made of a metal oxide material.

[0033] Optionally, the detection component further includes:

[0034] an electrode layer structure comprising a first electrode and a second electrode;

[0035] The first electrode is insulated and connected to the substrate, the second electrode is insulated and connected to the first electrode, and the gas-sensitive layer structure is connected to the second electrode.

[0036] According to a second aspect of the present application, an electronic device is provided, comprising a gas detector, wherein the gas detector is the electronic device as described above.

[0037] According to a third aspect of the present application, a vehicle is further provided, comprising an electronic device, wherein the electronic device is the electronic device described above.

[0038] The beneficial effect of the present application is that it provides an electronic device that optimizes a gas detector to improve detection stability.

[0039] More specifically, some embodiments of the present application may produce the following specific beneficial effects:

[0040] In the gas detector of the embodiment of the present application, a detection component for detecting gas is arranged in the gas chamber, and the filter component is connected to the shell body. The filter component is used to filter impurities in the gas entering the gas chamber along the air inlet. Through the above technical solution, the impurities in the gas entering the gas chamber can be filtered, thereby improving the purity of the gas entering the gas chamber, avoiding damage to the detection component caused by impurities after long-term use, and ensuring the detection stability of the detection component.

[0041] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0043] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same drawing numbers represent the same parts in the following description.

[0044] Figure 1 is a cross-sectional view of the overall structure of an electronic device provided in an exemplary embodiment of the present application;

[0045] Figure 2 is a cross-sectional view of the overall structure of the electronic device provided in an exemplary embodiment of the present application with the first filter removed;

[0046] Figure 3 is a cross-sectional view of the overall structure of the shell body provided in an exemplary embodiment of the present application;

[0047] Figure 4 is a schematic structural diagram of the first electrode, the second electrode and the gas-sensitive layer structure provided in an exemplary embodiment of the present application;

[0048] Figure 5 is an X-ray diffraction pattern of the synthesized iron oxide sensitive material provided in an exemplary embodiment of the present application;

[0049] Figure 6 This is a response recovery curve of the iron oxide MEMS sensor prepared in an exemplary embodiment of the present application when testing 100ppm alcohol gas, with a response time of only 1s;

[0050] Figure 7 This is the selectivity diagram of the prepared iron oxide MEMS sensor for 100 ppm test gas, S alcohol / SCH4 = 7;

[0051] Figure 8 This is the dynamic response diagram of the prepared iron oxide MEMS sensor with waterproof membrane and ordinary membrane to alcohol;

[0052] Figure 9 It is a schematic diagram of the overall structure of a vehicle provided in an exemplary embodiment of the present application.

[0053] Description of Reference Numerals

[0054] 10. Vehicles;

[0055] 100. Gas detector;

[0056] 110, shell body; 11a, air chamber; 11b, air inlet; 12c, gap;

[0057] 111, base;

[0058] 112. Sealing member; 113. Step portion;

[0059] 120. Detection components;

[0060] 121. Substrate;

[0061] 122. Gas-sensitive layer structure;

[0062] 123. Electrode layer structure; 1231. First electrode; 1232. Second electrode;

[0063] 124. Insulation layer structure; 1241. First insulation layer; 1242. Second insulation layer;

[0064] 130. Filter assembly; 131. First filter element;

[0065] 132. Second filter element;

[0066] 140. Installation department;

[0067] F1, air intake direction;

[0068] S. Central axis. DETAILED DESCRIPTION

[0069] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not 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.

[0070] According to the first aspect of this application, referring to Figures 1 to 8 The present application provides a gas detector 100 , comprising a shell body 110 , a detection component 120 and a filter component 130 .

[0071] Among them, the shell body 110 has an air chamber 11a and an air inlet 11b, the detection component 120 is located in the air chamber 11a, the detection component 120 is used to detect the gas, the filter component 130 is connected to the shell body 110, and the filter component 130 is used to filter impurities in the gas entering the air chamber 11a along the air inlet 11b.

[0072] Through the above technical solution, impurities in the gas entering the air chamber 11a can be filtered, thereby improving the purity of the gas entering the air chamber 11a, reducing interference with the detection component 120, improving its performance and accuracy, and avoiding the formation of accumulations of impurities in the air chamber 11a after long-term use, such as condensation of water vapor and deposition of solid particles, to avoid these accumulations causing damage or blockage of the detection component 120, resulting in performance degradation or failure. By reducing the entry of moisture and particulate matter, the service life of the gas detector 100 can be extended, the frequency of maintenance and replacement can be reduced, and thus damage to the detection component 120 can be reduced, ensuring the detection stability of the detection component 120, and effectively extending the service life of the gas detector 100.

[0073] The user sends air into the air chamber 11a along the air inlet 11b. After the gas passes through the filter component 130, the particulate matter and moisture contained in the gas can be filtered, thereby ensuring that the performance of the detection component 120 is not affected by particulate matter and water molecules, improving the stability and moisture resistance of the gas detector 100, and the detection response speed is fast.

[0074] In some embodiments, reference Figure 1 and Figure 2 The filter assembly 130 includes: a first filter element 131.

[0075] At least a portion of the first filter element 131 blocks the air inlet 11 b , wherein the first filter element 131 has a first filter portion for allowing gas to pass through.

[0076] By at least partially blocking the air inlet 11b with the first filter element 131, and utilizing the first filter portion of the first filter element 131 to allow gas to pass through, the particulate matter and some moisture in the gas can be blocked outside the air chamber 11a and will not enter the air chamber 11a. The preliminary filtration of the gas can be completed by at least partially blocking the air inlet 11b with the first filter element 131, which is simple and convenient.

[0077] Specifically, the first filter element 131 can be adapted to the shape of the air inlet 11 b , and the first filter element 131 can be stuck in the air inlet 11 b , and the first filter portion of the first filter element 131 can be used to filter the gas.

[0078] In some other embodiments, the first filter element 131 may also be covered on the air inlet 11 b , and the first filter element 131 may be aligned with the air inlet 11 b to form a first filter portion.

[0079] Specifically, at least a portion of the first filter element 131 is located at the first end portion of the air inlet 11 b.

[0080] In some embodiments, the first filter portion may be constructed as a pore structure, and the gas enters the air chamber 11 a through the pore structure along the air inlet 11 b .

[0081] In some embodiments, the pore structure may be constructed in a circular shape, and the inner diameter of the pore structure may be between 0.9 μm and 2.5 μm, further ensuring the filtering effect on gas impurities.

[0082] In some embodiments, in order to further improve the filtering effect of gas impurities, refer to Figure 1 and Figure 2 The filter assembly 130 also includes a second filter element 132 .

[0083] Specifically, the second filter element 132 is located between the first filter element 131 and the detection assembly 120, and at least a portion of the second filter element 132 blocks the air inlet 11b, so as to filter impurities in the gas passing through the first filter portion.

[0084] At least a portion of the second filter element 132 is located at the second end portion of the air inlet 11 b.

[0085] By using the second filter element 132 in combination with the first filter element 131, the filtering effect on gas impurities can be further improved, the level of moisture and particulate matter entering the gas chamber 11a can be controlled, the stability of the gas detector 100 can be ensured, accurate measurement results can be maintained, the false alarm rate can be reduced, and the reliability and accuracy of the detection component 120 can be improved.

[0086] In some embodiments, the second filter element 132 can be constructed as a waterproof breathable membrane. The waterproof breathable membrane is soaked in a potassium permanganate solution with a concentration of 2 mol / L for 30 seconds, then taken out and dried at 60°C. The waterproof breathable membrane is glued to the shell body 110 with glue, which can further improve the absorption of moisture in the gas, reduce the impact of water molecules on the sensor performance, and enhance the moisture resistance of the sensor.

[0087] In some embodiments, reference Figure 3 The shell body 110 includes a base 111 and a sealing member 112 .

[0088] Among them, the base 111 has an opening, and the sealing member 112 is connected to the base 111, and the opening of the base 111 is sealed by the sealing member 112, and an air inlet 11b is formed on the sealing member 112, and the second filter member 132 is connected to the side of the sealing member 112 facing the air chamber 11a. The opening of the base 111 is sealed by setting the sealing member 112. Except for the air inlet 11b, the entire air chamber 11a is in a closed state, which can ensure that the detection component 120 only reacts chemically with the gas in the air chamber 11a and is not affected by external airflow, thereby improving the overall stability of the detector.

[0089] refer to Figure 3 The sealing member 112 can be constructed as a plate structure, such as a circular plate or a square plate, and the base 111 can be correspondingly constructed as a cylinder or a square cylinder with an opening.

[0090] A step portion 113 is provided on the inner circumferential surface of the base 111 , and the peripheral end of the sealing member 112 is clamped on the step portion 113 to complete the connection between the sealing member 112 and the base 111 . At this time, the peripheral end of the second filter element 132 is located between the sealing member 112 and the step portion 113 .

[0091] In some embodiments, in order to ensure the flow direction of the intake air, refer to Figure 3 The air inlet 11b has an air inlet direction F1 for allowing gas to pass through, and the air inlet direction F1 is set parallel to the central axis S of the base 111. The air inlet 11b guides the gas into the air chamber 11a.

[0092] In some embodiments, the detection assembly 120 is encapsulated in the gas chamber 11 a . The detection assembly 120 includes a substrate 121 . The gas detector 100 further includes a mounting portion 140 .

[0093] The mounting portion 140 is formed on or connected to the bottom inner wall surface of the base 111 , and at least a portion of the substrate 121 is connected to the mounting portion 140 .

[0094] By connecting at least part of the substrate 121 to the mounting portion 140, the substrate 121 is stably arranged in the gas chamber 11a, and the base 111 does not shake in the gas chamber 11a, thereby achieving the effect of ensuring the movement stability of the detection component 120 in the gas chamber 11a during the movement of the gas detector 100.

[0095] In order to facilitate the removal of the detection component 120 from the groove structure, a gap 12c may be provided between the bottom of the substrate 121 and the bottom of the groove structure to facilitate the application of force to the detection component 120 .

[0096] In some embodiments, the mounting portion 140 can be constructed as a groove structure. Taking the mounting portion 140 formed on the bottom inner wall surface of the base 111 as an example, the mounting portion 140 is a groove structure opened on the bottom inner wall surface of the base 111, and part of the side wall surface of the substrate 121 is abutted against the inner wall surface of the groove structure, further ensuring that the substrate 121 is stably set in the gas chamber 11a. Moreover, the mounting portion 140 is constructed as a groove structure, and there is no need to add additional components in the gas chamber 11a, which simplifies the overall structure of the gas detector 100 and facilitates installation and maintenance.

[0097] In some embodiments, reference Figure 2 The detection component 120 also includes a gas-sensitive layer structure 122 .

[0098] The gas-sensing layer structure 122 is formed on the substrate 121 , and the gas-sensing layer structure 122 is used to detect gas.

[0099] In some embodiments, the gas-sensitive layer structure 122 is made of a metal oxide material. The metal oxide material may be iron oxide, but may also be other metal oxide materials. The material is selected based on actual conditions and is not limited here.

[0100] Taking low-cost iron oxide as an example, the preparation process of the sensitive material is simple, the output is large, and it has a fast response time to alcohol gas, good selectivity and moisture resistance.

[0101] Illustratively, the gas-sensing layer structure 122 includes a gas-sensing layer made of an iron oxide material, and the gas-sensing layer is coated on the substrate 121 .

[0102] In some embodiments, reference Figure 1 and Figure 4 , the detection component 120 also includes an electrode layer structure 123.

[0103] The electrode layer structure 123 includes a first electrode 1231 and a second electrode 1232 , wherein the first electrode 1231 is insulated and connected to the substrate 121 , and the second electrode 1232 is insulated and connected to the first electrode 1231 , connecting the gas sensing layer structure 122 to the second electrode 1232 .

[0104] Specifically, the first electrode 1231 is configured as a heating electrode, the second electrode 1232 is configured as an interdigital electrode, and the gas-sensitive layer structure 122 completely covers the interdigital electrodes.

[0105] In some embodiments, the detection component 120 further includes an insulating layer structure 124 , and the insulating layer structure 124 includes a first insulating layer 1241 and a second insulating layer 1242 .

[0106] A first insulating layer 1241 is disposed between the first electrode 1231 and the second electrode 1232 , and a second insulating layer 1242 is disposed between the first electrode 1231 and the substrate 121 . Both the first insulating layer 1241 and the second insulating layer 1242 are made of insulating materials.

[0107] For example, based on MEMS technology, the gas-sensitive layer structure 122 and the electrode layer structure 123 are integrated into the substrate 121. After the gas-sensitive layer structure 122 receives the gas, the first electrode 1231 and the second electrode 1232 will also come into contact with the gas, and an electric potential difference will be generated between the first electrode 1231 and the second electrode 1232. Using some processors on the substrate 121, the potential difference can be measured and the corresponding results can be output, such as testing the gas concentration.

[0108] Among them, some processors on the substrate 121 are existing technologies, such as MCU processors, which will not be described in detail here.

[0109] In some embodiments, the gas may be ethanol gas, or other gases, depending on the gas to be detected.

[0110] refer to Figures 5 to 8 , which is the experimental data obtained after the corresponding test of the gas detector was carried out after the filter component was set on the shell body. It can be known that after the gas detector of the present application filters the gas, the detection component has good response speed and stability, especially for alcohol gas, the response speed is faster.

[0111] According to a second aspect of the present application, an electronic device is provided, comprising a gas detector 100, wherein the gas detector 100 is the electronic device described above. The electronic device has all the advantages of the gas detector 100, which will not be described in detail in this application.

[0112] In some embodiments, the electronic device is configured as an alcohol sensor, that is, an ethanol sensor, for detecting alcohol concentration.

[0113] According to the third aspect of this application, reference Figure 9, a vehicle 10 is also provided, including an electronic device, wherein the electronic device is the electronic device described above. The vehicle 10 has all the beneficial effects of the above-mentioned electronic device, which will not be described in detail in this application.

[0114] The vehicle 10 may be a fuel vehicle, a plug-in hybrid vehicle, a new energy vehicle, etc., and this application does not make any specific limitation thereto.

[0115] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0116] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0117] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other unless there is any conflict.

[0118] The above are merely preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A gas detector, characterized in that: include: a shell body having an air chamber and an air inlet; A detection component is located in the gas chamber and is used to detect the gas; a filter assembly connected to the shell body and configured to filter impurities in the gas entering the gas chamber through the gas inlet; Wherein, the detection component includes: substrate; A gas-sensitive layer structure formed on the substrate for gas detection; an electrode layer structure comprising a first electrode and a second electrode; Wherein, the first electrode is insulated and connected to the substrate, the second electrode is insulated and connected to the first electrode, and the gas-sensitive layer structure is connected to the second electrode; The gas-sensitive layer structure includes a gas-sensitive layer; The filter assembly comprises: a first filter element, at least partially blocking the air inlet; and a second filter element, located between the first filter element and the detection component; The first filter element has a first filter portion, the first filter portion is for gas to pass through, and the second filter element at least partially blocks the air inlet and is used to filter impurities in the gas passing along the first filter portion; The gas inlet has a gas inlet direction for allowing gas to pass through, and the gas inlet direction is parallel to the central axis of the base.

2. The gas detector according to claim 1, characterized in that The first filter portion is configured as a pore structure.

3. The gas detector according to claim 2, characterized in that The inner diameter of the pore structure is between 0.9 μm and 2.5 μm.

4. The gas detector according to claim 1, wherein The second filter element is configured as a waterproof and breathable membrane.

5. The gas detector according to claim 4, characterized in that The shell body comprises: a base having an opening; a sealing member connected to the base and closing the opening; The air inlet is formed to the sealing member; and the second filter member is connected to a side surface of the sealing member facing the air chamber.

6. The gas detector according to claim 5, characterized in that Also includes: a mounting portion formed on or connected to the bottom inner wall surface of the base; Wherein, at least a portion of the substrate is connected to the mounting portion.

7. The gas detector according to claim 6, characterized in that The mounting portion is configured as a groove structure; At least a portion of the substrate is located in the groove structure, and a sidewall surface of the substrate abuts against an inner sidewall surface of the groove structure.

8. The gas detector according to claim 1, wherein The gas-sensitive layer structure is made of metal oxide material.

9. An electronic device, characterized in that: It comprises a gas detector, which is the gas detector according to any one of claims 1 to 8.

10. A vehicle, characterized in that: The electronic device comprises an electronic device, wherein the electronic device is the electronic device according to claim 9.

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