A new type of vehicle-mounted hydrogen sensor structure

Abstract

The utility model discloses a novel vehicle -mounted hydrogen gas sensor structure, including, the casing is equipped with hydrogen gas sensor body in, the casing includes lower casing, the lower casing lower side has with the connecting cylinder who communicates of probe of hydrogen gas sensor body, the connecting cylinder lower extreme clamping and sealed communication collection cover's upper end, the collection cover is flared, the end portion of collection cover is close to the gradually expanding increase hydrogen gas into the speed of sensor body's end portion of connecting cylinder, improves the inductive sensitivity of probe to hydrogen gas, expands hydrogen gas response, and the area of absorption reaches better response effect, has the fast reaction time, data accurate, simple structure, facilitates the miniaturization design.

Description

Technical Field

[0001] This utility model relates to the field of vehicle-mounted hydrogen sensors, and in particular to a novel vehicle-mounted hydrogen sensor structure. Background Technology

[0002] Hydrogen, as a clean energy source, has been widely used in fuel cells, new energy vehicles, and other fields in recent years. However, hydrogen is flammable and explosive, with an explosion limit of 4% to 75% (by volume). Therefore, real-time monitoring of hydrogen leaks is essential to ensure safety during its use. Hydrogen sensors, as a key component of hydrogen monitoring systems, directly affect the response speed and detection accuracy of the entire system.

[0003] Currently, hydrogen sensors typically use metal oxide semiconductors (such as SnO2 and ZnO), palladium (Pd), and their alloys as sensing materials. These sensors usually need to operate at a specific temperature to improve their sensitivity and response speed to hydrogen. To achieve fast response and high sensitivity, existing hydrogen sensors often employ miniature heaters to heat the sensing materials, while simultaneously optimizing the sensor structure to improve hydrogen collection efficiency.

[0004] In terms of structural design, traditional hydrogen sensors typically employ simple gas collection ports, resulting in a short path for hydrogen to enter the sensor and a limited contact area between the gas and the sensitive material. This leads to response times and detection sensitivity that are insufficient to meet the demands of rapid response and high-precision detection in practical applications. Furthermore, traditional structures suffer from deficiencies in gas flow control; gas is prone to backflow or stagnation within the sensor, affecting its stability and repeatability. The lack of an effective gas guiding structure in traditional hydrogen sensors results in slow hydrogen entry and limited contact area with the sensitive material, leading to slow response speed and low sensitivity. Utility Model Content

[0005] The technical problem solved by this utility model is to provide a novel vehicle-mounted hydrogen sensor structure.

[0006] This application provides a novel vehicle-mounted hydrogen sensor structure, comprising,

[0007] A housing, wherein a hydrogen sensor body is housed within the housing;

[0008] The housing includes a lower housing, and the lower side of the lower housing has a connecting cylinder that communicates with the probe of the hydrogen sensor body;

[0009] The lower end of the connecting cylinder engages with and seals the upper end of the collection cover. The collection cover is trumpet-shaped, and the end of the collection cover near the connecting cylinder gradually expands towards the end away from the connecting cylinder.

[0010] Furthermore, the connecting cylinder has multiple engaging grooves spaced apart on its peripheral wall, and the collecting cover has multiple engaging parts spaced apart in its middle. The engaging parts are corresponding to the engaging grooves, and the engaging parts are engaged and connected with the engaging grooves.

[0011] Furthermore, the collection cover has a connection hole in the middle, and the plurality of engaging parts are arranged around the connection hole, with the connection hole corresponding to the connecting cylinder.

[0012] Furthermore, the connecting hole is provided with a plurality of first arc-shaped plates spaced apart on both sides of the engaging part, and the lower end of the connecting cylinder is provided with a second arc-shaped plate, the first arc-shaped plates and the second arc-shaped plates being tightly fitted together.

[0013] Furthermore, the end edge of the collection cover away from the connecting cylinder is provided with an annular portion.

[0014] Furthermore, the distance between the end of the collection cover near the connecting cylinder and the end of the collection cover away from the connecting cylinder is H, and the range of H is mm ≤ H ≤ mm.

[0015] Furthermore, an outer conical inclined surface is provided between the end of the collection cover near the connecting cylinder and the end of the collection cover away from the connecting cylinder, and the angle α between the inclined surface and the end of the collection cover away from the connecting cylinder is equal to 0.00°.

[0016] Furthermore, the upper outer periphery of the lower housing is provided with a plurality of hooks spaced apart, and the lower end of the upper housing extends downward with a plurality of fixing parts corresponding to the hooks. The fixing parts are provided with notches for the hooks to be inserted, and the hooks are engaged with the fixing parts.

[0017] Furthermore, the upper housing has two external connecting parts on opposite sides for fixed connection with external devices.

[0018] Furthermore, the lower housing has an electrical connection portion along its length, and the electrical connection portion has a hollow cavity through which the wires of the hydrogen sensor body pass.

[0019] Compared with the prior art, this utility model adopts a structure in which the connecting cylinder and the collection cover are sealed together, as well as a horn-shaped structure for collection, which increases the speed at which hydrogen enters the sensor body, improves the sensitivity of the probe to hydrogen, and expands the hydrogen sensing and absorption area to achieve a better sensing effect. It has the advantages of fast response time, accurate data, simple structure, and easy miniaturization design. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model.

[0021] Figure 1 This is an overall schematic diagram of the novel vehicle-mounted hydrogen sensor structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the collection cover of this utility model;

[0023] Figure 3 This is a schematic diagram of the upper shell of this utility model;

[0024] Figure 4 This is a schematic diagram of the numerical values ​​H and α of the collection cover of this utility model.

[0025] The reference numerals in the attached figures include:

[0026] Housing 1; Lower housing 11; Connecting cylinder 111; Hook 112; Electrical connection part 113; Upper housing 12; Fixing part 121; External connection part 122;

[0027] Collection cover 2; locking part 21; connecting hole 22; first arc plate 221; annular part 23; reinforcing rib 24. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0029] like Figure 1As shown, this novel vehicle-mounted hydrogen sensor structure includes a housing 1, which is generally rectangular in shape. The housing 1 houses a hydrogen sensor body (not shown in the figure). The hydrogen sensor body includes a probe, electrodes, and a miniature heater. The probe is the core component of the hydrogen sensor body and has a specific response to hydrogen. Commonly used sensitive materials include metal oxides (such as tin dioxide (SnO2) and zinc oxide (ZnO), palladium (Pd), and their alloys. These materials undergo physical or chemical changes upon contact with hydrogen, resulting in changes in the sensor's output signal. The electrodes are used to conduct current or voltage signals and are connected to the sensitive material. The hydrogen concentration is determined by measuring the change in the resistance of the sensitive material. The probe of the hydrogen sensor body needs to operate at a certain temperature to improve sensitivity and response speed. The miniature heater heats the sensitive material to its optimal operating temperature. For example, in sensors using metal oxides as sensitive materials, heating to several hundred degrees Celsius is typically required to improve the sensitivity of the sensitive material to hydrogen detection.

[0030] like Figure 1 As shown, the housing 1 includes a lower housing 11, which is hollow inside and has an opening at the upper end. The lower housing 11 has a connecting cylinder 111 on its lower side that communicates with the probe of the hydrogen sensor body. The connecting cylinder 111 has openings at both ends and has a hollow cavity inside for hydrogen to pass through.

[0031] like Figure 1 As shown, the lower end of the connecting cylinder 111 engages with and seals the upper end of the collection cover 2. The collection cover 2 is funnel-shaped, and the end of the collection cover 2 near the connecting cylinder 111 gradually expands towards the end away from the connecting cylinder 111. Hydrogen gas enters the connecting cylinder 111 through the funnel-shaped collection cover 2, which is used by the probe of the hydrogen sensor body to sense and monitor the hydrogen gas.

[0032] Compared with the prior art, this utility model adopts a structure in which the connecting cylinder 111 and the collection cover 2 are sealed together, as well as a collection horn-shaped structure, which increases the speed at which hydrogen enters the sensor body, improves the sensitivity of the probe to hydrogen, and expands the hydrogen sensing and absorption area to achieve a better sensing effect. It has the advantages of fast response time, accurate data, simple structure, and easy miniaturization design.

[0033] like Figure 2 As shown, the lower peripheral wall of the connecting cylinder 111 is provided with a plurality of engaging grooves (not shown in the figure), and the upper middle part of the collection cover 2 is provided with a plurality of engaging parts 21. The engaging parts 21 are hook-shaped and are correspondingly arranged with the engaging grooves. The engaging parts 21 are engaged with the engaging grooves to fix the connecting cylinder 111 and the collection cover 2, thereby increasing stability and preventing the collection cover 2 from detaching from the connecting cylinder 111.

[0034] like Figure 2 As shown, the collection hood 2 has a connecting hole 22 in the middle for hydrogen to pass through. Multiple engaging parts 21 are arranged around the connecting hole 22, and the connecting hole 22 corresponds to the connecting cylinder 111. Furthermore, the connecting hole 22 has multiple first arc-shaped plates 221 spaced apart on both sides of the engaging parts 21. The lower end of the connecting cylinder 111 has a second arc-shaped plate (not shown). The first arc-shaped plates 221 and the second arc-shaped plates fit tightly together to prevent hydrogen leakage between the first arc-shaped plates 221 and the second arc-shaped plates, thus increasing safety.

[0035] like Figure 2 As shown, the end edge of the collection cover 2 away from the connecting cylinder 111 is provided with an annular part 23, which is used to connect to external equipment or increase the coverage of the collection cover 2.

[0036] like Figure 2 As shown, the end of the collection cover 2 away from the connecting cylinder 111 is polygonal, and multiple reinforcing ribs 24 are provided on the end of the collection cover 2 near the connecting cylinder 111 and extending downward at the corners of the end of the collection cover 2 away from the connecting cylinder 111 to increase the sturdiness of the collection cover 2.

[0037] Preferred, such as Figure 3 As shown, the housing 1 further includes an upper housing 12, and a receiving cavity is formed between the upper housing 12 and the lower housing 11 to accommodate the hydrogen sensor body. Further, the upper outer periphery of the lower housing 11 is provided with a plurality of spaced hooks 112, and the lower end of the upper housing 12 extends downward with a plurality of fixing portions 121 corresponding to the hooks 112. Each fixing portion 121 has a notch for inserting the hooks 112, and the hooks 112 engage with the fixing portions 121 to fix the upper housing 12 and the lower housing 11, increasing stability.

[0038] like Figure 3 As shown, the upper housing 12 has two external connecting parts 122 on opposite sides, and the external connecting parts 122 have a through hole in the middle for fixed connection with external equipment.

[0039] like Figure 3 As shown, the lower housing 11 has an electrical connection part 113 along its lower length. The electrical connection part 113 has a hollow cavity through which the wires of the hydrogen sensor body pass, thereby electrically connecting the hydrogen sensor body to an external device.

[0040] like Figure 4As shown, the distance H between the end of the collection hood 2 near the connecting cylinder 111 and the end of the collection hood 2 away from the connecting cylinder 111 is 2.95mm ≤ H ≤ 5mm. An outer conical inclined surface is provided between the end of the collection hood 2 near the connecting cylinder 111 and the end of the collection hood 2 away from the connecting cylinder 111, and the angle α between the inclined surface and the end of the collection hood 2 away from the connecting cylinder 111 is 13.5°. Specifically, in the first embodiment, the test gas is 1.95% hydrogen. The hydrogen sensor is located above the Z-axis, at a distance from the test gas from 0mm to 30mm. The reaction time, concentration display time, and alarm concentration value are measured every 5mm. The power is turned on, and the hydrogen sensor is in normal working condition for 20 minutes. The test gas is then released, and the flow rate is stabilized at approximately 1000mL / min. The alarm value of the hydrogen sensor is tested, and the alarm data with and without the collection hood 2 are compared, including the reaction time, concentration display time, and alarm concentration value.

[0041] like Figure 4 As shown, the angle α of the sampling cover 2 is 13.5°, and the height H is 5mm. The test data are as follows:

[0042]

[0043] Comparing the test data of the sensor with and without the sampling hood 2: at a distance of about 20mm, the reaction time and concentration display time are not significantly different, but the concentration displayed by the sensor with the sampling hood 2 is relatively lower; at a distance of about 25mm, the reaction time and concentration display time with the sampling hood 2 are longer than those without the sampling hood 2; however, at a distance of about 30mm, the sensor without the sampling hood 2 can no longer measure the hydrogen concentration, while the sensor with the sampling hood 2 can still measure data for about 19 seconds, thus improving the sensitivity of hydrogen monitoring.

[0044] In the second embodiment, the test gas is 1.95% hydrogen. The hydrogen sensor is located above the Z-axis, at a distance of 0 mm to 30 mm from the test gas. The reaction time, concentration display time, and alarm concentration value are measured every 5 mm. The power is turned on, and the hydrogen sensor is allowed to operate normally for 20 minutes. The test gas is then released, and the flow rate is stabilized at approximately 1000 mL / min. The alarm value of the hydrogen sensor is tested, and the alarm data (including reaction time, concentration display time, and alarm concentration value) are compared between the samples without and with the collection hood 2.

[0045] like Figure 4 As shown, the angle α of the acquisition cover 2 is 13.5°, and the height H is 2.95mm. The test data are as follows:

[0046] Comparing the test data of the sensor with and without the sampling hood 2: at a distance of about 25mm, the reaction time and concentration display time are not significantly different; however, at a distance of about 30mm, the sensor without the sampling hood 2 can no longer measure the hydrogen concentration, while the structure with the sampling hood 2 can still measure the data in about 22 seconds, thus improving the sensitivity of hydrogen monitoring.

[0047] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0048] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0049] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0050] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A novel vehicle-mounted hydrogen sensor structure, characterized in that, include, Housing (1), wherein a hydrogen sensor body is provided inside the housing (1); The housing (1) includes a lower housing (11), and the lower housing (11) has a connecting cylinder (111) on its lower side that communicates with the probe of the hydrogen sensor body; The lower end of the connecting cylinder (111) engages with and seals the upper end of the collection cover (2). The collection cover (2) is trumpet-shaped, and the end of the collection cover (2) near the connecting cylinder (111) gradually expands towards the end away from the connecting cylinder (111).

2. The novel vehicle-mounted hydrogen sensor structure as described in claim 1, characterized in that, The connecting cylinder (111) has multiple locking grooves spaced apart on its peripheral wall, and the collection cover (2) has multiple locking parts (21) spaced apart in its middle. The locking parts (21) are correspondingly arranged with the locking grooves, and the locking parts (21) are engaged and connected with the locking grooves.

3. The novel vehicle-mounted hydrogen sensor structure as described in claim 2, characterized in that, The collection cover (2) has a connecting hole (22) in the middle, and the plurality of engaging parts (21) are arranged around the connecting hole (22). The connecting hole (22) is arranged correspondingly to the connecting cylinder (111).

4. The novel vehicle-mounted hydrogen sensor structure as described in claim 3, characterized in that, The connecting hole (22) is provided with a plurality of first arc-shaped plates (221) spaced apart on both sides of the engaging part (21), and the lower end of the connecting cylinder (111) is provided with a second arc-shaped plate, and the first arc-shaped plate (221) and the second arc-shaped plate are tightly fitted together.

5. The novel vehicle-mounted hydrogen sensor structure as described in claim 4, characterized in that, The end edge of the collection cover (2) away from the connecting cylinder (111) is provided with an annular part (23).

6. The novel vehicle-mounted hydrogen sensor structure as described in claim 1, characterized in that, The distance between the end of the collection cover (2) near the connecting cylinder (111) and the end of the collection cover (2) away from the connecting cylinder (111) is H, and the range of H is 2.95mm≤H≤5mm.

7. The novel vehicle-mounted hydrogen sensor structure as described in claim 6, characterized in that, The collection cover (2) has an outer conical inclined surface between the end near the connecting cylinder (111) and the end away from the connecting cylinder (111) of the collection cover (2), and the angle α between the inclined surface and the end away from the connecting cylinder (111) of the collection cover (2) is equal to 13.5°.

8. The novel vehicle-mounted hydrogen sensor structure as described in claim 1, characterized in that, The lower housing (11) has a plurality of spaced hooks (112) on its upper outer periphery. The lower end of the upper housing (12) extends downward and has a plurality of fixing parts (121) that are spaced apart and correspond to the hooks (112). The fixing parts (121) have notches for inserting the hooks (112). The hooks (112) are engaged with the fixing parts (121).

9. The novel vehicle-mounted hydrogen sensor structure according to any one of claims 1 to 8, characterized in that, The upper housing (12) has two external connecting parts (122) on opposite sides for fixed connection with external equipment.

10. The novel vehicle-mounted hydrogen sensor structure according to any one of claims 1 to 9, characterized in that, The lower housing (11) has an electrical connection part (113) along its length on the lower side, and the electrical connection part (113) has a hollow cavity through which the wires of the hydrogen sensor body pass.

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