Intelligent dual-sensor gas alarm

Abstract

The utility model discloses a kind of intelligent double-sensor gas alarm, it is related to gas alarm technical field, comprising: upper cover, alarm shell body fixedly connected in upper cover inside, filter screen, power box, alarm lamp, power supply device, the inside of alarm shell body is equipped with gas detection mechanism.The utility model is through the parallel layout of semiconductor sensor and electrochemical sensor in gas detection component, and with the intelligent algorithm of microcontroller cooperation, a set of cross-validation detection logic is constructed, core function is in, microcontroller will receive and compare the signal of two sensors simultaneously: semiconductor sensor is sensitive to methane and various volatile organic compounds, but susceptible to kitchen fume, alcohol etc. Interference;And electrochemical sensor has high specificity to carbon monoxide. When only semiconductor sensor triggers signal, and electrochemical sensor has no response, microcontroller can determine as interference gas instead of real gas leakage, to suppress false alarm.

Description

Technical Field

[0001] This utility model relates to the field of gas alarm technology, specifically to an intelligent dual-sensor gas alarm. Background Technology

[0002] Gas alarms are safety devices that detect the concentration of combustible or toxic gases in the environment and issue an alarm in a timely manner. They are widely used in homes and commercial establishments. Most existing alarms use a single type of sensor combined with a fixed air intake structure to achieve basic gas monitoring.

[0003] However, traditional single-sensor solutions have significant drawbacks: while semiconductor sensors are sensitive to natural gas, they are easily interfered with by common volatile organic compounds such as alcohol and cooking fumes. The lack of cross-validation mechanisms leads to frequent false alarms, causing user panic and reducing their trust in the alarm's authenticity, thus creating safety hazards. Furthermore, existing gas alarms, after detecting a leak, can only provide local audible and visual alarms or remote information pushes, limiting their functionality to early warning. When a leak occurs in the user's absence, the leak will continue, potentially leading to serious accidents such as fires. Therefore, existing technologies suffer from passive response methods and an inability to proactively intervene and cut off the gas supply in emergencies.

[0004] Meanwhile, the fixed air intake duct design has sampling blind spots. When a leak occurs to the side or behind the alarm, the air intake direction cannot be actively adjusted, making it difficult to quickly detect the gas, resulting in response delays or even missed alarms, and failing to meet the safety requirement of quickly locating the leak source.

[0005] Furthermore, replacing and maintaining the filter of the alarm installed on the top is extremely inconvenient. Traditional clip-on or screw-fixed types require personnel to work at height throughout the process, posing a risk of falls. Moreover, manual operation can easily cause the filter to fall and be damaged or cause secondary injuries, severely restricting the regular maintenance and upkeep of the equipment.

[0006] In summary, a smart dual-sensor gas alarm needs to be developed to solve the above problems. Utility Model Content

[0007] To address the shortcomings of existing technologies, the technical solution adopted by this utility model is as follows: an intelligent dual-sensor gas alarm, comprising: a top cover, an alarm housing fixed to the inside of the top cover, a filter screen, a power supply box, an alarm light, and a power supply device. A gas detection mechanism is installed inside the alarm housing. This gas detection mechanism is the core functional unit for achieving accurate and reliable gas detection. The gas detection mechanism also has the following characteristics: A gas detection component is installed on the inner surface of the alarm housing. Its function is to actively draw in ambient gas and perform accurate analysis. The gas detection component includes a first motor, which serves as a power source and its function is to provide stable rotation. An adjustable air duct component is installed on the inner surface of the alarm housing. Its function is to adjust the air intake direction to cope with different leakage locations. The adjustable air duct component includes an air adjustment duct, which functions to form a rotatable directional airflow channel. The filter removal component is installed at the bottom of the alarm housing. Its core function is to provide a quick, tool-free filter replacement solution. The filter removal component includes a U-shaped tube, which serves as a handle for the user to apply force later.

[0008] Furthermore, a rotating shaft is fixed to the output end of the first motor, which functions to transmit torque. An air intake fan is installed on the outer surface of the rotating shaft. The function of the air intake fan is to rotate at high speed under the drive of the motor to generate directional airflow, thereby forcibly drawing the surrounding gas to be detected into the alarm, realizing active sampling and significantly improving the response speed.

[0009] Furthermore, a semiconductor sensor is fixedly mounted on the top of the inner wall of the alarm housing, to the right of the first motor. This sensor is specifically designed for highly sensitive detection of combustible gases such as methane. An electrochemical sensor is fixedly mounted on the top of the inner wall of the alarm housing, to the left of the first motor. This sensor is designed for accurate detection of toxic gases such as carbon monoxide. This dual-sensor parallel arrangement constitutes a complementary detection system. A microcontroller is fixedly mounted on the inner wall of the alarm housing. This microcontroller serves as the control core of the entire alarm, responsible for processing sensor signals, executing judgment algorithms, and controlling all actuators. The microcontroller is also configured to generate and output a drive signal to an external gas emergency shut-off solenoid valve simultaneously with detecting a real gas leak and activating the alarm. This allows for automatic shut-off of the gas supply without human intervention, preventing further leakage.

[0010] Furthermore, the first motor is installed in the inner wall of the alarm housing. This embedded installation method helps to optimize the internal space layout. The height of the intake fan is set below the semiconductor sensor and the electrochemical sensor. The function of this position design is to ensure that the intake airflow can first fully wash the sensing elements of the two sensors, ensuring the timeliness and accuracy of detection.

[0011] Furthermore, the bottom of the air duct is fixedly connected to the output end of the second motor, and a support base is installed on the outer surface of the second motor. Its function is to provide a stable installation base for the second motor. A connecting rod is fixedly connected to one side of the support base. Its function is to serve as an auxiliary support component to enhance the structural stability of the entire adjustable air duct component during operation.

[0012] Furthermore, the outer surface of the air regulating duct is rotatably connected to the inner surface of the alarm housing, and the opening at the top of the air regulating duct is located directly below the intake fan. The function of this alignment design is to ensure that the airflow generated by the intake fan can enter the air duct without obstruction, forming a continuous airflow path. The end of the connecting rod away from the support base is fixed to the inner wall of the alarm housing.

[0013] Furthermore, a limit bar is slidably connected to the inner wall of the U-shaped tube, which functions to precisely guide and limit the up and down movement of the U-shaped tube to prevent it from being misaligned. Rigid pull ropes are fixed to both sides of the upper surface of the U-shaped tube.

[0014] Furthermore, a limiting inclined tube is slidably connected to the outer surface of the rigid pull rope. Its function is to serve as a guide channel for the pull rope, changing the direction of force transmission. The limiting inclined tube is made of nylon, and its smooth and wear-resistant inner wall can reduce friction with the rigid pull rope and avoid damage to the pull rope. A sliding rod is slidably connected to the inner wall of the limiting inclined tube. Its function is to allow linear movement under the traction of the pull rope. A compression plate is fixedly connected to the end of the sliding rod away from the rigid pull rope. Its function is to directly press or release the filter screen. A compression spring is fixedly connected to the side of the compression plate near the sliding rod. Its function is to continuously provide an outward pressing force to the compression plate, thereby firmly fixing the filter screen under normal conditions.

[0015] Furthermore, the top end of the limiting rod is fixed to the bottom of the alarm housing to establish a stable installation reference.

[0016] Furthermore, the outer surface of the limiting inclined tube is fixedly connected to the inner wall of the alarm housing, and the side of the sliding rod away from the extrusion plate is fixedly connected to the end of the rigid pull rope away from the U-shaped tube, thus forming a complete force transmission chain. The end of the extrusion spring away from the extrusion plate is fixedly connected to the inner surface of the alarm housing, providing a reliable reaction force fulcrum for the pressing action.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This invention utilizes a parallel arrangement of semiconductor and electrochemical sensors in a gas detection component, coupled with a microcontroller's intelligent algorithm, to construct a cross-validation detection logic. The core function is that the microcontroller simultaneously receives and compares the signals from both sensors: the semiconductor sensor is sensitive to methane and various volatile organic compounds, but is easily interfered with by kitchen fumes and alcohol; while the electrochemical sensor is highly specific for carbon monoxide. When only the semiconductor sensor triggers a signal, and the electrochemical sensor does not respond, the microcontroller can determine that it is an interfering gas rather than a real gas leak, thereby suppressing false alarms and further solving the problem of frequent false alarms caused by traditional single-sensor alarms that cannot distinguish between the target gas and common interfering substances.

[0018] 2. This invention utilizes a second motor in the adjustable air duct component to drive the rotation of the air duct. Combined with the control logic of a microcontroller, this allows the air inlet of the alarm to rotate horizontally according to instructions, rather than remaining fixed. This solves the problem of traditional alarms, which suffer from low sampling efficiency or even ineffective intake of leaked gas in complex home environments or when the leak source is located in a specific direction, leading to alarm delays or missed alarms. By actively turning the air inlet towards a higher gas concentration, directional sampling and tracking of the leak source are achieved, avoiding the decrease in monitoring efficiency caused by installation location limitations.

[0019] 3. This utility model utilizes a specially designed U-shaped tube and a hooked clothes support pole in the filter removal component. This allows maintenance personnel to hook the U-shaped tube from the ground using the clothes support pole, ultimately releasing the pressure of the compression plate on the filter screen through a series of transmissions. This solves the fall risk associated with traditional high-altitude alarms where maintenance personnel must frequently climb to heights to remove the filter screen, as well as the potential damage or injury from a falling filter. It achieves "remote ground removal" of the filter screen, halving the number of high-altitude operations, and effectively avoids personal safety risks and component damage during the removal process by using the clothes support pole to guide the filter screen downwards.

[0020] 4. This utility model utilizes the resetting function of the U-shaped tube, the squeezing plate, and the squeezing spring in the filter removal component. The function is that when installing a new filter, the worker can simply pull down the U-shaped tube with one hand to retract the squeezing plate and create an installation channel. After releasing, the squeezing plate automatically presses the filter together under the action of the spring. This solves the problem that in confined, high-altitude environments, installing filters in traditional alarms requires complex two-handed operations (such as simultaneously aligning holes and manipulating clips) to achieve fixation, which is inconvenient and poses a risk of instability. The simple "pull down, push in, release" one-handed process simplifies the high-altitude installation process, avoiding installation difficulties and associated safety hazards caused by cumbersome operations and instability. Attached Figure Description

[0021] Figure 1 This is the front view of this utility model; Figure 2 This is a cross-sectional view of the alarm housing of this utility model; Figure 3 This is a structural schematic diagram of the adjustable air duct component of this utility model; Figure 4 This is a schematic diagram of the structure of the U-shaped tube of this utility model; Figure 5 This is a structural schematic diagram of the detachable filter component of this utility model; Figure 6 This is a schematic diagram of the structure of the limiting inclined tube of this utility model; Figure 7 This is a utility model Figure 6 Enlarged view of point A in the middle.

[0022] In the diagram: 1. Top cover; 2. Alarm housing; 3. Filter screen; 4. Power supply box; 5. Alarm light; 6. Power supply device; 7. Gas detection mechanism; 71. Gas detection component; 711. First motor; 712. Rotating shaft; 713. Suction fan; 714. Semiconductor sensor; 715. Electrochemical sensor; 716. Microcontroller; 72. Adjustable air duct component; 721. Air duct; 722. Second motor; 723. Support base; 724. Connecting rod; 73. Filter screen removal component; 731. U-shaped tube; 732. Limiting rod; 733. Rigid pull rope; 734. Limiting inclined tube; 735. Sliding rod; 736. Extrusion plate; 737. Extrusion spring. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical applications of the present invention, and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for a particular purpose. Example 1

[0024] Please see Figure 1 - Figure 7 This utility model provides a technical solution: an intelligent dual-sensor gas alarm, comprising: an upper cover 1, an alarm housing 2 fixed to the inside of the upper cover 1, a filter screen 3, a power supply box 4, an alarm light 5, and a power supply device 6. A gas detection mechanism 7 is installed inside the alarm housing 2. This gas detection mechanism 7 is the core functional unit for achieving accurate and reliable gas detection. The gas detection mechanism 7 also has the following features: Gas detection component 71 is installed on the inner surface of alarm housing 2. Its function is to actively draw in ambient gas and perform accurate analysis. Gas detection component 71 includes a first motor 711, which serves as a power source and its function is to provide stable rotation. The adjustable air duct component 72 is installed on the inner surface of the alarm housing 2. Its function is to adjust the air intake direction to cope with different leakage locations. The adjustable air duct component 72 includes an air duct 721, which functions to form a rotatable directional airflow channel. The filter removal component 73 is installed at the bottom of the alarm housing 2. Its core function is to provide a quick, tool-free solution for replacing the filter 3. The filter removal component 73 includes a U-shaped tube 731, which serves as a handle for the user to apply force later.

[0025] The output end of the first motor 711 is fixedly connected to a rotating shaft 712, which is used to transmit torque. An air intake fan 713 is installed on the outer surface of the rotating shaft 712. The function of the air intake fan 713 is to rotate at high speed under the drive of the motor, generate directional airflow, thereby forcibly drawing the surrounding gas to be detected into the alarm, realizing active sampling and significantly improving the response speed.

[0026] A semiconductor sensor 714 is fixedly attached to the top of the inner wall of the alarm housing 2, to the right of the first motor 711. Its function is to detect combustible gases such as methane with high sensitivity. An electrochemical sensor 715 is fixedly attached to the top of the inner wall of the alarm housing 2, to the left of the first motor 711. Its function is to accurately detect toxic gases such as carbon monoxide. This parallel arrangement of dual sensors constitutes a complementary detection system. A microcontroller 716 is fixedly attached to the inner wall of the alarm housing 2. Its function is to act as the control core of the entire alarm, responsible for processing sensor signals, executing judgment algorithms, and controlling all actuators. The microcontroller 716 is also configured to generate and output a drive signal to an external gas emergency shut-off solenoid valve simultaneously with determining that a real gas leak has occurred and activating the alarm. This allows for automatic shut-off of the gas supply without human intervention, preventing further leakage.

[0027] The first motor 711 is installed in the inner wall of the alarm housing 2. This embedded installation method helps to optimize the internal space layout. The height of the intake fan 713 is set below the semiconductor sensor 714 and the electrochemical sensor 715. The function of this position design is to ensure that the intake airflow can first fully wash the sensing elements of the two sensors, ensuring the timeliness and accuracy of detection.

[0028] The bottom of the air duct 721 is fixedly connected to the output end of the second motor 722. The outer surface of the second motor 722 is equipped with a support base 723, which provides a stable installation base for the second motor 722. A connecting rod 724 is fixedly connected to one side of the support base 723, which serves as an auxiliary support to enhance the structural stability of the entire adjustable air duct component 72 during operation.

[0029] The outer surface of the air duct 721 is rotatably connected to the inner surface of the alarm housing 2. The opening at the top of the air duct 721 is located directly below the intake fan 713. The function of this alignment design is to ensure that the airflow generated by the intake fan 713 can enter the air duct without obstruction, forming a continuous airflow path. The end of the connecting rod 724 away from the support base 723 is fixed to the inner wall of the alarm housing 2.

[0030] The inner wall of the U-shaped tube 731 is slidably connected to a limit rod 732, which functions to precisely guide and limit the up and down movement of the U-shaped tube 731 to prevent it from being misaligned. Rigid pull ropes 733 are fixedly connected to both sides of the upper surface of the U-shaped tube 731.

[0031] The outer surface of the rigid pull rope 733 is slidably connected to a limiting inclined tube 734, which serves as a guide channel for the pull rope and changes the direction of force transmission. The limiting inclined tube 734 is made of nylon, and its smooth and wear-resistant inner wall reduces friction with the rigid pull rope 733 and prevents damage to the pull rope. A sliding rod 735 is slidably connected to the inner wall of the limiting inclined tube 734, which allows the pull rope to move linearly. A compression plate 736 is fixedly connected to the end of the sliding rod 735 away from the rigid pull rope 733, which directly presses or releases the filter screen 3. A compression spring 737 is fixedly connected to the side of the compression plate 736 near the sliding rod 735, which continuously provides an outward pressing force to the compression plate 736, thereby firmly fixing the filter screen 3 under normal conditions.

[0032] The top of the limit bar 732 is fixed to the bottom of the alarm housing 2 to establish a stable installation reference.

[0033] The outer surface of the limiting inclined tube 734 is fixedly connected to the inner wall of the alarm housing 2. The side of the sliding rod 735 away from the pressing plate 736 is fixedly connected to the end of the rigid pull rope 733 away from the U-shaped tube 731, thus forming a complete force transmission chain. The end of the compression spring 737 away from the pressing plate 736 is fixedly connected to the inner surface of the alarm housing 2, providing a reliable reaction force fulcrum for the pressing action.

[0034] The intelligent dual-sensor gas alarm designed in this device operates on a continuous process that integrates active sampling, accurate detection, intelligent judgment, and convenient maintenance.

[0035] The specific workflow is as follows: First, when the alarm is powered on, the microcontroller 716 issues a command to start the first motor 711 in the gas detection component 71. The first motor 711 begins to rotate, transmitting torque to the intake fan 713 mounted on the outer surface of the shaft 712 via its output end. The intake fan 713 rotates at high speed, creating a negative pressure at its air inlet. This negative pressure forces ambient air around the alarm into the alarm through the air duct 721 of the adjustable air duct component 72. The air duct 721, with its opening directly below the intake fan 713, effectively receives and guides this intake airflow. Simultaneously, the microcontroller 716 can control the second motor 722 to rotate according to program settings or sensor feedback. The second motor 722 drives the air duct 721 to rotate along the inner wall of the alarm housing 2 via its output end, thereby changing the orientation of the air inlet to achieve directional sampling and leak source tracing. During this process, the intake air first passes through the filter screen 3 located at the bottom of the alarm housing 2, where large particulate impurities such as dust and oil mist are filtered out to prevent them from contaminating the internal precision sensors. The semiconductor sensor 714 and the electrochemical sensor 715 are both mounted above the intake fan 713, without obstructing its rotation.

[0036] The air sample, after initial filtration, flows upward under the continuous drive of the intake fan 713. Because the intake fan 713 is positioned below the semiconductor sensor 714 and the electrochemical sensor 715, this airflow effectively washes over and envelops the sensing elements of these two sensors. The semiconductor sensor 714, located to the right of the first motor 711, responds to the presence of combustible gas molecules such as methane, causing a change in the conductivity of its internal metal oxide semiconductor. The electrochemical sensor 715, located to the left of the first motor 711, undergoes a redox reaction with the presence of toxic gas molecules such as carbon monoxide, generating a weak current proportional to the gas concentration. These two sensors convert the sensed physical and chemical signals into corresponding electrical signals, which are transmitted in real time to the microcontroller 716 fixed to the inner wall of the alarm housing 2.

[0037] The microcontroller 716 amplifies, filters, and digitizes the electrical signals received from the semiconductor sensor 714 and the electrochemical sensor 715. Its internally stored algorithm compares real-time data with preset alarm thresholds and performs cross-validation by combining the readings from both sensors to distinguish between genuine gas leaks and common sources of interference (such as alcohol or perfume). When the gas concentration detected by either sensor exceeds the safety threshold, and the microcontroller 716 determines it to be a genuine leak risk, it immediately issues an alarm command. This command drives the alarm light 5 to flash at a specific frequency to provide a visual alarm, and simultaneously triggers the built-in buzzer to emit a high-decibel acoustic alarm. Furthermore, the microcontroller 716 can also send remote alarm information to the user's mobile app or property management center via a connected built-in wireless communication module. The entire system is powered by the power supply unit 6 and can be maintained by a backup battery in the power supply box 4 during mains power outages.

[0038] Over time, contaminants will accumulate on filter 3, requiring regular replacement to maintain unobstructed airflow. The filter removal component 73 of this device is designed for safe and convenient maintenance.

[0039] When it is necessary to remove the filter screen 3, the operator can use a clothes hanger, a common household item, with a barb at the top. The barb is inserted into the U-shaped opening at the bottom of the U-tube 731. The top of the U-shaped opening is at a suitable height from the bottom of the alarm housing 2 to facilitate proper movement of the clothes hanger. Then, the U-tube 731 is pulled downwards. Under force, the U-tube 731 moves downwards stably along the sliding limit rod 732 connected to its inner wall. The function of the limit rod 732 is to ensure that the U-tube 731 always moves vertically, preventing it from swaying.

[0040] The downward movement of the U-shaped tube 731 causes the rigid pull ropes 733 fixed to both sides of it to move downward. The rigid pull ropes 733 slide against the inner wall of the limiting inclined tube 734, which serves as a guide channel, thereby changing the direction of force transmission. The movement of the rigid pull ropes 733 pulls the sliding rod 735 fixed at the upper end, causing the sliding rod 735 to further drive the compression plate 736 fixed on the other side within the inner wall of the limiting inclined tube 734. This overcomes the elastic force of the compression spring 737 and slides away from the filter screen 3, thus completely releasing the pressure on the surface of the filter screen 3.

[0041] Therefore, once the clamping force is released, the filter screen 3 will detach on its own due to gravity. At this time, maintenance personnel can immediately tilt the clothes support pole, and the falling filter screen 3 will slide down the surface of the clothes support pole and be safely caught. Then, the clothes support can be removed from the U-shaped opening of the U-shaped tube 731. This process effectively avoids the damage or bouncing problems that may be caused by the filter screen 3 falling directly to the ground from a height. It also allows maintenance personnel to complete the disassembly without climbing, significantly reducing the risk of working at height.

[0042] It should be noted that when installing the cleaned or brand-new filter 3, the staff still need to use a stool to reach the installation height, lift the filter 3, and initially align it with the bottom of the alarm housing 2. At this time, since the barb of the clothes support rod used for disassembly has been disengaged from the U-shaped opening of the U-tube 731, the compression plate 736 has been reset under the elastic force of the compression spring 737, returning to the initial pressing position.

[0043] Therefore, the installation process must be carried out meticulously according to the following steps: First, the operator uses their hand to slide the filter 3 upwards along the guide surface on the outside of the alarm housing 2 a short distance to initially position it. Next, the operator uses their other hand to pull down the U-shaped tube 731. The downward movement of the U-shaped tube 731, driven by the rigid pull rope 733 and the sliding rod 735, forces the compression plate 736 to overcome the spring force and slide back towards the side closer to the rigid pull rope 733, thus making way for the filter 3 to continue moving upwards and avoiding interference. Once the filter 3 is fully pushed in and reaches the preset installation position, the operator can release their fingers from pulling the U-shaped tube 731. The compression plate 736, driven by the compression spring 737, immediately resets, and its working surface tightly adheres to the inner surface of the filter 3, reapplying a stable clamping force to complete the fixing.

[0044] Compared to traditional designs where both disassembly and installation must be completed at height, this device achieves "ground-based disassembly," halving the necessary number of high-altitude operations. This not only improves the overall safety of maintenance operations to a certain extent but also substantially avoids the potential safety risks associated with workers standing on stools or other unstable heights during both disassembly and installation. It significantly enhances the overall safety of maintenance operations, preventing the potential safety hazards of standing on stools or using other objects to reach a height for filter replacement.

[0045] In a preferred embodiment of this invention, to achieve proactive safety measures, the microcontroller 716 can establish a control connection wirelessly with a normally open gas emergency shut-off solenoid valve conforming to national standards. When the microcontroller 716 determines a real gas leak event based on the cross-verification results of the semiconductor sensor 714 and the electrochemical sensor 715, the control logic it executes includes, but is not limited to: 1. activating the alarm light; 2. reporting remote alarm information; 3. sending a continuous drive signal to the emergency shut-off solenoid valve, causing the solenoid valve to immediately act upon receiving the signal, changing from a normally open state to a closed state, thereby mechanically blocking the downstream gas pipeline and achieving rapid and automatic gas source cut-off.

[0046] This linkage solution transforms the high-precision detection advantage of this invention into proactive safety response capabilities, thereby enhancing the level of home gas safety. Those skilled in the art should understand that the solenoid valve is an external safety actuator independent of the alarm body, and can be selected and installed according to the actual conditions of the user's pipeline; therefore, this is an optional or preferred solution.

[0047] Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of this utility model without creative effort should fall within the protection scope of this utility model. Structures, devices, and operating methods not specifically described and explained in this utility model, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. An intelligent dual-sensor gas alarm, comprising: The alarm housing (2) fixed to the inside of the alarm housing (1), the filter screen (3), the power supply box (4), the alarm light (5), and the power supply device (6) are characterized in that: a gas detection mechanism (7) is installed inside the alarm housing (2), and the gas detection mechanism (7) further comprises: Gas detection component (71), which is installed on the inner surface of the alarm housing (2), includes a first motor (711). An adjustable air duct component (72) is installed on the inner surface of the alarm housing (2), and the adjustable air duct component (72) includes an air duct (721). A filter removal component (73) is installed at the bottom of the alarm housing (2), and the filter removal component (73) includes a U-shaped tube (731).

2. The intelligent dual-sensor gas alarm according to claim 1, characterized in that: The output end of the first motor (711) is fixedly connected to a rotating shaft (712), and an air intake fan (713) is installed on the outer surface of the rotating shaft (712).

3. The intelligent dual-sensor gas alarm according to claim 2, characterized in that: A semiconductor sensor (714) is fixedly attached to the top of the inner wall of the alarm housing (2) on the right side of the first motor (711), an electrochemical sensor (715) is fixedly attached to the top of the inner wall of the alarm housing (2) on the left side of the first motor (711), and a microcontroller (716) is fixedly attached to the inner wall of the alarm housing (2).

4. The intelligent dual-sensor gas alarm according to claim 3, characterized in that: The first motor (711) is installed in the inner wall of the alarm housing (2), and the height of the intake fan (713) is set below the semiconductor sensor (714) and the electrochemical sensor (715).

5. The intelligent dual-sensor gas alarm according to claim 1, characterized in that: The bottom of the air regulating duct (721) is fixedly connected to the output end of the second motor (722), and a support base (723) is installed on the outer surface of the second motor (722). A connecting rod (724) is fixedly connected to one side of the support base (723).

6. The intelligent dual-sensor gas alarm according to claim 5, characterized in that: The outer surface of the air regulating duct (721) is rotatably connected to the inner surface of the alarm housing (2). The opening at the top of the air regulating duct (721) is located directly below the intake fan (713). One end of the connecting rod (724) away from the support base (723) is fixed to the inner wall of the alarm housing (2).

7. The intelligent dual-sensor gas alarm according to claim 1, characterized in that: The inner wall of the U-shaped tube (731) is slidably connected to a limit rod (732), and rigid pull ropes (733) are fixedly connected to both sides of the upper surface of the U-shaped tube (731).

8. The intelligent dual-sensor gas alarm according to claim 7, characterized in that: The outer surface of the rigid pull rope (733) is slidably connected to a limiting inclined tube (734), and the inner wall of the limiting inclined tube (734) is slidably connected to a sliding rod (735). A compression plate (736) is fixedly connected to one end of the sliding rod (735) away from the rigid pull rope (733), and a compression spring (737) is fixedly connected to the side of the compression plate (736) near the sliding rod (735).

9. The intelligent dual-sensor gas alarm according to claim 8, characterized in that: The top end of the limiting rod (732) is fixed to the bottom of the alarm housing (2).

10. The intelligent dual-sensor gas alarm according to claim 9, characterized in that: The outer surface of the limiting inclined tube (734) is fixed to the inner wall of the alarm housing (2), the side of the sliding rod (735) away from the extrusion plate (736) is fixed to the end of the rigid pull rope (733) away from the U-shaped tube (731), and the end of the extrusion spring (737) away from the extrusion plate (736) is fixed to the inner surface of the alarm housing (2).

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