Gas detection structure and gas detector
By employing a design that optimizes the gas flow path using partition bumps and flow channels in the gas detector, the problem of gas retention is solved, achieving uniform gas distribution and efficient detection, especially improving the accuracy and sensitivity of detection under low concentration conditions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-07
- Publication Date
- 2026-03-20
AI Technical Summary
In scenarios involving low-concentration or trace gas leaks, existing four-in-one gas detectors cannot adequately fill the mixing chamber with gas, resulting in some gas retention and affecting the sensor's timely response and detection accuracy.
In the gas detection structure, the positioning groove of the main housing is divided into multiple sub-sections by dividing protrusions. Each sub-section is equipped with a vent hole that connects to the gas sensor. The gas flow path is optimized by flow channels and guide protrusions to ensure that the gas is evenly distributed to each sensor.
It improves gas utilization, ensuring that each gas can be detected by its corresponding sensor in a timely and accurate manner, especially under low concentration conditions, significantly improving detection sensitivity and accuracy and reducing gas retention.
Smart Images
Figure CN224019778U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of gas detection equipment, and in particular to a gas detection structure and a gas detector. Background Technology
[0002] Gas detectors play a crucial role in industrial production, environmental monitoring, and public safety, monitoring the concentration of various harmful or critical gases in real time to ensure safe and compliant working environments. Traditional gas detectors are mostly designed for single gases. Faced with complex and ever-changing detection needs, personnel must carry multiple detectors, increasing operational complexity and limiting the flexibility and efficiency of testing. To address this issue, multi-functional gas detectors, such as four-in-one models, have emerged in recent years. These devices can simultaneously detect multiple gases within a single unit, greatly improving the convenience and comprehensiveness of testing work.
[0003] However, existing four-in-one gas detectors generally employ a method of introducing the gas to be detected into multiple independent chambers or a mixed chamber, with each chamber being detected separately by different sensors. While this method solves the problem of multi-gas detection to some extent, the design of multiple independent chambers or a mixed chamber often requires sufficient gas flow to ensure that each sensor can obtain a sufficient sample. In practical applications, especially in scenarios involving low-concentration or trace gas leaks, the gas volume may be insufficient to fully fill the entire mixed chamber, resulting in some gas retention and affecting the timely response and detection accuracy of the sensors. Utility Model Content
[0004] To overcome at least one of the defects described in the prior art, this utility model provides a gas detection structure and a gas detector. It can solve the problem of gas retention, optimize gas distribution and flow, ensure that each gas can be detected uniformly and efficiently by its corresponding sensor, while maintaining structural simplicity and cost-effectiveness.
[0005] The technical solution adopted by this utility model to solve its problem is:
[0006] A gas detection structure includes: a main housing, wherein a first positioning groove is provided in the main housing corresponding to the area where a gas sensor is located, and a dividing protrusion is provided in the first positioning groove, the dividing protrusion dividing the first positioning groove into multiple sub-sections according to the position of the gas sensor, and each sub-section is provided with a vent hole for communicating with the gas sensor; and a vent hood, wherein the vent hood has a gas-containing cavity, the vent hood is fastened to the first positioning groove of the main housing, and an air inlet is provided on the vent hood, the air inlet communicating with the gas-containing cavity, and the gas-containing cavity communicating with the vent hole.
[0007] By adopting the above scheme, the first positioning groove is cleverly divided into multiple sub-partitions by the dividing protrusions, which reduces the total space required for the space. Each sub-partition is equipped with a vent connected to a gas sensor, which can reduce gas stagnation and help the gas to be pre-distributed and accelerated before entering the main housing, thereby reducing stagnation and improving gas utilization. Through precise division and optimized gas flow paths, it is ensured that each gas can be detected by its corresponding sensor in a timely and accurate manner, maintaining high sensitivity even under low concentration conditions.
[0008] Furthermore, in the four sub-partitions, a flow channel is provided between every two adjacent sub-partitions to enable the two sub-partitions to be interconnected.
[0009] By adopting the above scheme and setting up flow channels, adjacent sub-zones can be interconnected, thus forming a more unified gas distribution system. When gas enters the gas chamber of the vent hood from the inlet, it can be distributed more evenly to each sub-zone. This uniform distribution helps ensure that each sensor receives a sufficient and representative gas sample, thereby improving the accuracy and reliability of the detection.
[0010] Furthermore, at least one side of the first positioning groove is provided with an inwardly recessed first guide protrusion, which is located in the gap between the sub-partitions, so that the gas in the first positioning groove can transition into the sub-partition and enter the vent.
[0011] By adopting the above scheme, gas can be more smoothly introduced from the main flow area into each sub-zone, reducing gas resistance and eddies during flow, thereby improving gas distribution efficiency and uniformity. The first guide protrusion further promotes gas flow within the first positioning groove. When gas encounters the guide protrusion, it is guided and flows more smoothly along its shape. This design helps reduce energy loss during gas flow, increasing flow velocity and efficiency; it also makes more efficient use of the space within the first positioning groove. This design makes the gas detection structure more compact and efficient, reducing manufacturing costs and improving overall equipment performance.
[0012] Furthermore, the sub-partitions within the first positioning groove are arranged in a matrix, and the separating protrusions are rectangular, with the four corners of the rectangles corresponding to the gaps between the sub-partitions.
[0013] By adopting the above scheme, through the matrix arrangement of sub-partitions and the design of rectangular dividing bumps, it can be ensured that the gas can be evenly distributed in each sub-partition and detected by the corresponding sensors. This design improves the accuracy and reliability of detection, while reducing the space between sub-partitions and avoiding gas stagnation.
[0014] Furthermore, the four corners of the rectangle in the dividing protrusion extend outward to form second guide protrusions, so that the gas in the first positioning groove can transition into the sub-section and enter the vent.
[0015] By adopting the above scheme, the gas can transition more smoothly from the first positioning groove into the sub-section during its flow. When the gas encounters the second guide protrusion, it is guided by its shape and flows along the edge of the protrusion into the sub-section. This design reduces gas resistance and eddies during the flow process, improving gas flow efficiency and uniformity.
[0016] Furthermore, each of the sub-partitions is provided with at least two vents, and at least two of the vents in each sub-partition have different lengths.
[0017] By adopting the above scheme, the layout and number of vents directly affect the sensor's detection performance. By rationally setting the position and number of vents, it can be ensured that each sensor receives a sufficient and representative gas sample, thereby improving the accuracy and reliability of the detection.
[0018] Furthermore, the vent is a strip-shaped hole, and both ends of the strip-shaped hole are bent to the same side and extended to form an extension section.
[0019] By adopting the above scheme, the vent hole presents a structure similar to an arch bridge, which increases its structural stability, maintains normal gas flow, reduces gas erosion and wear on the hole wall, and extends the service life of the equipment.
[0020] Furthermore, in each of the sub-districts, at least two of the vents have extensions facing different directions.
[0021] By adopting the above solution, it is easier to fit the shapes of multiple vents together to accommodate gas sensors. At the same time, it ensures the structural stability of the structure.
[0022] A gas detector includes a back shell, a duckbill clip, a battery, a PCB board, a display screen, a gas sensor, a button, and a transparent cover to form a gas detection structure. The back shell is fastened to the main shell. The duckbill clip is assembled on the outer surface of the back shell. The battery, PCB board, display screen, and gas sensor are disposed between the back shell and the main shell. The button and the transparent cover are assembled on the outer surface of the main shell.
[0023] By adopting the above scheme, the gas detection structure is the core component of the gas detector, responsible for introducing the gas to be measured into the gas sensor for detection. Optimizing the design of the gas detection structure ensures smooth gas flow and sufficient contact with the sensor, thereby improving detection accuracy and reliability. This design also reduces gas stagnation and accumulation in the flow channel, lowering errors and interference.
[0024] Furthermore, a shock-absorbing pad is provided between the PCB board and the display screen.
[0025] By adopting the above solution, the gas detector may be affected by various vibration sources during use, such as slight shaking when held or wobbling when placed on an uneven surface. If these vibrations are directly transmitted to the display screen, they may damage the electronic components inside the screen, thereby affecting the display effect and lifespan. The shock-absorbing pad can effectively absorb and disperse this vibration energy, thus reducing the risk of display screen damage.
[0026] In summary, the gas detection structure and gas detector provided by this utility model have the following technical effects:
[0027] 1. By setting a dividing protrusion in the first positioning groove of the main housing, the positioning groove is cleverly divided into at least four sub-sections, each of which is equipped with a vent connected to a gas sensor. This design allows gas to be distributed more evenly and efficiently to each sub-section, thereby reducing gas stagnation.
[0028] 2. The sidewalls of the air-bearing chamber in the vent are designed with slopes or curves, which helps to pre-distribute and accelerate the flow of gas before it enters the main housing. This design reduces the residence time of gas in the flow channel, improves gas utilization, and ensures that each gas can be detected promptly and accurately by its corresponding sensor. Especially in low-concentration or trace gas leakage scenarios, this design can significantly improve the sensitivity and accuracy of detection;
[0029] 3. This gas detection structure is suitable for detecting a variety of gases and can be modified according to the number of gas sensors to adapt to the use of different detectors, thus improving product flexibility. Attached Figure Description
[0030] Figure 1 This is an exploded structural diagram of an embodiment of the present utility model;
[0031] Figure 2 This is a schematic diagram of the front structure of the main housing according to an embodiment of the present invention;
[0032] Figure 3 This is a cross-sectional structural diagram of the ventilation hood according to an embodiment of the present utility model;
[0033] Figure 4 This is a schematic diagram of the exploded structure of the gas detector according to an embodiment of the present invention.
[0034] The reference numerals in the attached drawings have the following meanings: 1. Main housing; 11. First positioning groove; 111. Sub-division; 112. Flow channel; 113. First guide protrusion; 12. Separating protrusion; 121. Second guide protrusion; 2. Vent hole; 21. Extension section; 3. Vent cover; 31. Air chamber; 311. Side wall; 32. Air inlet; 4. Back housing; 5. Duckbill clip; 6. Battery; 7. PCB board; 8. Display screen; 9. Gas sensor; 10. Button; 20. Transparent cover; 30. Shock-absorbing pad. Detailed Implementation
[0035] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described and discussed below with reference to the accompanying drawings. Obviously, what is described here is only a part of the examples of this invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the protection scope of this invention.
[0036] To facilitate understanding of the embodiments of this utility model, further explanations and descriptions will be provided below with reference to the accompanying drawings and specific embodiments. These embodiments do not constitute a limitation on the embodiments of this utility model.
[0037] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
[0039] See Embodiment 1 of this utility model. Figures 1-4As shown, a gas detection structure is disclosed, comprising a main housing 1 and a vent hood 3. The main housing 1 has a first positioning groove 11 corresponding to the area where the gas sensor 9 is located. A dividing protrusion 12 is provided within the first positioning groove 11, dividing the first positioning groove 11 into multiple sub-sections 111 according to the position of the gas sensor 9. Each sub-section 111 has a vent hole 2 for communication with the gas sensor. The dividing protrusion 12 cleverly divides the first positioning groove 11 into multiple sub-sections 111, reducing the total space required. Furthermore, each sub-section 111 is equipped with a vent hole 2 connected to the gas sensor, reducing gas retention. The vent hood 3 has a gas-containing cavity 31, which is fastened into the first positioning groove 11 of the main housing 1. An air inlet 32 is provided on the vent hood 3, communicating with the gas-containing cavity 31, which in turn communicates with the vent hole 2. Optionally, the sidewall 311 of the gas cavity 31 is an inclined or curved surface that transitions to the first positioning groove 11, which helps to pre-distribute and accelerate the flow of gas before it enters the main housing 1, reduce stagnation, and improve gas utilization. Through precise separation and optimized gas flow paths, it is ensured that each gas can be detected by its corresponding sensor in a timely and accurate manner, and high sensitivity can be maintained even under low concentration conditions.
[0040] In some embodiments, four sub-zones 111 are provided. In each of the four sub-zones 111, a flow channel 112 is provided between every two adjacent sub-zones 111 to connect the two zones and form a more unified gas distribution system. This ensures that the gas can be more evenly distributed to each sub-zone 111, improving the accuracy and reliability of the detection.
[0041] In some embodiments, the first positioning groove 11 is provided with an inwardly recessed first guide protrusion 113 on at least one side. These protrusions are located in the gap between sub-partitions 111, which helps the gas to transition into the sub-partitions 111 and enter the vent 2.
[0042] In this embodiment 1, the sub-partitions 111 within the first positioning groove 11 are arranged in a matrix. The dividing protrusions 12 are designed as rectangles, with their four corners extending outwards to form second guide protrusions 121, which also serve to guide gas flow. Through the matrix arrangement of the sub-partitions 111 and the rectangular dividing protrusions 12, it can be ensured that the gas is evenly distributed into each sub-partition 111 and detected by the corresponding sensors. This design improves the accuracy and reliability of detection while reducing the empty spaces between sub-partitions 111, thus preventing gas stagnation. In other embodiments, the arrangement of the sub-partitions 111 and the shape of the dividing protrusions are not limited, as long as the above effects are achieved.
[0043] In some embodiments, a vent hole 2 may be provided on the partition protrusion 12 to increase the area where air can contact the gas sensor 9, thereby improving detection accuracy.
[0044] Preferably, in some embodiments, each sub-partition 111 is provided with at least two vent holes 2, and at least two of the vent holes 2 in each sub-partition 111 have different lengths. This allows the vent holes 2 in each sub-partition 111 to be arranged sequentially to form a circle or rectangle. The layout and number of vent holes 2 directly affect the sensor's detection performance. By rationally setting the position and number of vent holes 2, it can be ensured that each sensor can receive a sufficient and representative gas sample, thereby improving the accuracy and reliability of the detection. A circular or rectangular layout helps to achieve this goal.
[0045] In this embodiment 1, the vent 2 is a strip-shaped hole, with both ends bent and extended to the same side to form an extension section 21. This gives the vent 2 an arch-like structure, increasing its structural stability while maintaining normal gas flow and reducing gas erosion and wear on the hole wall, thus extending the equipment's service life. Optionally, at least two of the vent 2 in each sub-section 111 have extension sections 21 facing different directions, which facilitates the shape splicing of multiple vent 2s to adapt to the gas sensor. This also ensures structural stability. Preferably, the bending angle between the extension section 21 and the strip-shaped hole ranges from 15° to 75°, with 30° being optimal.
[0046] This utility model also relates to a gas detector, including a back shell 4, a duckbill clip 5, a battery 6, a PCB board 7, a display screen 8, a gas sensor 9, a button 10, and a transparent cover 20 arranged in a gas detection channel 112 structure. The back shell 4 is fastened to the main shell 1 to form a closed detection environment. The duckbill clip 5 is mounted on the outer surface of the back shell 4, making it easy to fix the gas detector to clothing or a backpack, improving portability. The battery 6, PCB board 7, display screen 8, and gas sensor 9 are located between the back shell 4 and the main shell 1. The gas sensor 9 is connected to the vent 2 of the gas detection channel 112 structure for detecting gas concentration. The button 10 and transparent cover 20 are mounted on the outer surface of the main shell 1, facilitating user operation and viewing of detection results. The gas detection channel 112 structure is the core part of the gas detector, responsible for introducing the gas to be tested into the gas sensor 9 for detection. By optimizing the design of the gas detection channel 112 structure, it is possible to ensure that the gas can flow smoothly and make full contact with the sensor, thereby improving the accuracy and reliability of the detection. This design can also reduce gas retention and accumulation in the flow channel 112, reducing errors and interference.
[0047] Because gas detectors may be affected by various vibration sources during use, such as slight shaking when held or wobbling when placed on uneven surfaces, these vibrations, if directly transmitted to the display screen 8, may damage the internal electronic components, thus affecting the display effect and lifespan. Therefore, to improve the stability and reliability of the display screen 8, in some embodiments, a shock-absorbing pad 30 is provided between the PCB board 7 and the display screen 8. Preferably, the shock-absorbing pad 30 is a single-sided sponge; in other embodiments, the specific material of the shock-absorbing pad 30 is not limited. The shock-absorbing pad 30 can effectively absorb and disperse vibration energy, thereby reducing the risk of damage to the display screen 8.
[0048] In summary, the gas detection structure and gas detector provided by this utility model have the following technical effects:
[0049] 1. By providing a dividing protrusion 12 in the first positioning groove 11 of the main housing 1, the positioning groove is cleverly divided into at least four sub-sections 111, each sub-section 111 being equipped with a vent 2 connected to a gas sensor. This design allows gas to be distributed more evenly and efficiently to each sub-section 111, thereby reducing gas stagnation.
[0050] 2. The sidewall 311 of the air-containing cavity 31 of the vent 3 is designed as a slope or curved surface, which helps to pre-distribute and accelerate the flow of gas before it enters the main housing 1. This design reduces the residence time of gas in the flow channel 112, improves the utilization rate of gas, and ensures that each gas can be detected by its corresponding sensor in a timely and accurate manner. Especially in low-concentration or trace gas leakage scenarios, this design can significantly improve the sensitivity and accuracy of detection;
[0051] 3. This gas detection structure is suitable for detecting a variety of gases and can be modified according to the number of gas sensors to adapt to the use of different detectors, thus improving product flexibility.
[0052] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.
Claims
1. A gas detection structure, characterized in that, include: The main housing (1) has a first positioning groove (11) in the area corresponding to the gas sensor (9). The first positioning groove (11) is provided with a dividing protrusion (12). The dividing protrusion (12) divides the first positioning groove (11) into multiple sub-partitions (111) according to the position of the gas sensor (9). Each sub-partition (111) is provided with a vent hole (2). The vent hole (2) is used to communicate with the gas sensor. A ventilation hood (3) has an air-containing cavity (31). The ventilation hood (3) is fastened to the first positioning groove (11) of the main housing (1). An air inlet (32) is provided on the ventilation hood (3). The air inlet (32) is connected to the air-containing cavity (31). The air-containing cavity (31) is connected to the ventilation hole (2).
2. The gas detection structure according to claim 1, characterized in that, In the four sub-partitions (111), a flow channel (112) is provided between every two adjacent sub-partitions (111) so that the two partitions can be connected to each other.
3. The gas detection structure according to claim 2, characterized in that, The first positioning groove (11) has an inwardly recessed first guide protrusion (113) on at least one side. The first guide protrusion (113) is located in the gap between the sub-partitions (111) so that the gas in the first positioning groove (11) can be transferred to the sub-partitions (111) and enter the vent (2).
4. The gas detection structure according to claim 3, characterized in that, The sub-partitions (111) in the first positioning groove (11) are arranged in a matrix. The dividing protrusion (12) is rectangular, and the four corners of the rectangle in the dividing protrusion (12) correspond to the gaps between the sub-partitions (111).
5. A gas detection structure according to claim 4, characterized in that, The four corners of the rectangle in the dividing protrusion (12) extend outward to form second guide protrusions (121), so that the gas in the first positioning groove (11) can be transferred to the sub-section (111) and enter the vent (2).
6. The gas detection structure according to claim 1, characterized in that, Each of the sub-partitions (111) is provided with at least two ventilation holes (2), and at least two of the ventilation holes (2) in each of the sub-partitions (111) have different lengths.
7. A gas detection structure according to claim 1, characterized in that, The ventilation hole (2) is a strip-shaped hole, and the two ends of the strip-shaped hole are bent to the same side and extended to form an extension section (21).
8. A gas detection structure according to claim 7, characterized in that, In each of the sub-partitions (111), at least two of the vents (2) have extensions (21) that face different directions.
9. A gas detector, characterized in that, The device includes a back shell (4), a duckbill clip (5), a battery (6), a PCB board (7), a display screen (8), a gas sensor (9), a button (10), a transparent cover (20), and a gas detection structure as described in any one of claims 1-7. The back shell (4) is fastened to the main shell (1). The duckbill clip (5) is mounted on the outer surface of the back shell (4). The battery (6), PCB board (7), display screen (8), and gas sensor (9) are located between the back shell (4) and the main shell (1). The button (10) and the transparent cover (20) are mounted on the outer surface of the main shell (1).
10. A gas detector according to claim 9, characterized in that, A shock-absorbing pad (30) is provided between the PCB board (7) and the display screen (8).