Combustible gas detector and combustible gas detection system

Abstract

The utility model belongs to the technical field of combustible gas detection, and particularly relates to a combustible gas detector and a combustible gas detection system.The combustible gas detector comprises a shell, a mainboard and an optical machine assembly, the shell is provided with a gas inlet, and the interior of the shell is communicated with the external environment through the gas inlet; the mainboard is arranged in the shell; the ray machine assembly comprises a ray machine support, a laser emitting assembly and a laser receiving assembly, the ray machine support is connected to the main board, and the laser emitting assembly and the laser receiving assembly are arranged at the two ends of the ray machine support respectively. The combustible gas detector provided by the utility model is simple in structure, and can effectively simplify the manufacturing process and reduce the production cost.

Description

Technical Field

[0001] This utility model belongs to the field of combustible gas detection technology, specifically relating to a combustible gas detector and a combustible gas detection system. Background Technology

[0002] In recent years, with increased public awareness of gas safety, the use of household gas detectors has become increasingly common. There are many types of household gas detectors, among which laser detectors are widely used in daily life due to their numerous advantages. Laser detectors employ a unique non-contact detection principle, unaffected by various gases, achieving truly zero false alarms. The internal photoelectric chip is hermetically sealed, unaffected by external environmental interference. Laser detectors have a long service life, depending on the laser inside, which has a lifespan of over 10 years, far exceeding the lifespan of semiconductor and catalytic sensors. Furthermore, based on optical principles and employing special algorithms, laser sensors can detect gas concentrations at the ppb (parts per billion) level. The entire detection process is green and safe, without chemical reactions, and produces no excess gas or substances.

[0003] Existing laser detectors mainly consist of a housing and a mainboard and laser sensor housed within it. While laser detectors offer excellent performance, the high cost of their internal laser sensors makes existing laser detectors expensive. Traditional laser sensors typically integrate a transmitter, a receiver (collectively called an optomechanical system), and a control board. The control board is a printed circuit board containing circuitry for the laser sensor's control unit and signal processing unit. During assembly, the control board is connected to the optomechanical system via soldering and adhesive bonding; it is also connected to the mainboard via soldering. The structural complexity of laser detectors leads to cumbersome manufacturing processes and high manufacturing costs.

[0004] Therefore, there is an urgent need to propose a combustible gas detector and combustible gas detection system to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a combustible gas detector with a simple structure that simplifies manufacturing processes and reduces production costs. This purpose is achieved through the following technical solution:

[0006] The first aspect of this utility model provides a combustible gas detector, comprising:

[0007] A housing, wherein an air inlet is provided on the housing, and the interior of the housing is connected to the external environment through the air inlet;

[0008] The motherboard is disposed inside the housing;

[0009] An optical-mechanical assembly, comprising an optical-mechanical bracket, a laser emitting component, and a laser receiving component, wherein the optical-mechanical bracket is connected to the motherboard, and the laser emitting component and the laser receiving component are respectively disposed at both ends of the optical-mechanical bracket.

[0010] The combustible gas detector in this technical solution directly connects the optomechanical support, laser emitting component, and laser receiving component to the main board, eliminating the need for a traditional laser sensor control board. Only the optomechanical component needs to be assembled, reducing the structural complexity of the combustible gas detector. Since there is no internal laser sensor control board, the structure of the combustible gas detector is no longer limited by its location, allowing for more flexible design of the overall layout and smoother gas flow. Understandably, this structural simplification significantly simplifies the production process, eliminating the need for laser sensor control board fabrication, assembly, testing, and calibration, thus reducing the manufacturing cost of the laser sensor and consequently lowering its factory cost.

[0011] In addition, the combustible gas detector of this utility model may also have the following additional technical features:

[0012] In some embodiments of this utility model, the motherboard is provided with a main control unit, a sensor control unit, and a sensor signal processing unit. The sensor signal processing unit and the sensor control unit are signal-connected, the sensor control unit and the main control unit are signal-connected, the laser emitting component and the sensor control unit are signal-connected, and the laser receiving component and the sensor signal processing unit are signal-connected.

[0013] In some embodiments of this utility model, the optical engine bracket includes a transmitter mounting plate and a receiver mounting plate arranged opposite to each other, as well as a first side plate and a second side plate arranged opposite to each other. The transmitter mounting plate and the receiver mounting plate are connected by the first side plate and the second side plate and form a cavity. Both the first side plate and the second side plate are provided with a communication port. The cavity is connected to the external environment through the communication port. The laser emitting component is disposed on the transmitter mounting plate, and the laser receiving component is disposed on the laser receiving component. The transmitter mounting plate, the receiver mounting plate, the first side plate, and the second side plate are all connected to the main board.

[0014] In some embodiments of this utility model, the laser emitting assembly includes an emitter and an emitting plate. The emitting plate is signal-connected to the sensing and control unit. The emitter is disposed on the emitting plate and signal-connected to the emitting plate. A first mounting hole is provided on the emitting end mounting plate. The emitter passes through the first mounting hole toward the cavity. The emitting plate is connected to the outside of the emitting end mounting plate.

[0015] In some embodiments of this utility model, the laser receiving assembly includes a receiver and a receiving plate. The receiving plate is signal-connected to the sensing signal processing unit. The receiver is disposed on the receiving plate and signal-connected to the receiving plate. A second mounting hole is provided on the receiving end mounting plate. The receiver passes through the second mounting hole facing the cavity. The receiving plate is connected to the outside of the receiving end mounting plate.

[0016] In some embodiments of this utility model, a linkage unit is provided on the motherboard, the linkage unit is signal-connected to the main control unit, and the linkage unit is used to output a valve closing pulse signal.

[0017] In some embodiments of this utility model, a power supply unit is provided on the motherboard. The power supply unit includes a power socket. The power supply unit is signal connected to the sensor control unit, the sensor signal processing unit, the main control unit, the laser emitting component, and the laser receiving component, respectively. The power supply unit is signal connected to an external power supply unit through the power socket.

[0018] In some embodiments of this utility model, the housing includes a front shell and a rear cover, the air inlet is disposed on the front shell, and the rear cover and the front shell are sealed together.

[0019] In a second aspect, this utility model provides a combustible gas detection system, which includes the combustible gas detector described in the above embodiments.

[0020] In some embodiments of this utility model, the combustible gas detection system further includes an alarm component. An alarm driving unit is provided on the motherboard. The alarm driving unit is signal-connected to the combustible gas detector. The alarm driving unit is used to drive the alarm component to sound an alarm.

[0021] In some embodiments of this utility model, the combustible gas detection system further includes a monitoring platform, and a communication unit is provided on the motherboard. The communication unit is signal-connected to the combustible gas detector, and the communication unit is used to send monitoring data to the monitoring platform. Attached Figure Description

[0022] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0023] Figure 1An exploded view schematically illustrates a combustible gas detector according to an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of a combustible gas detector according to an embodiment of the present invention is shown.

[0025] Figure 3 A schematic diagram of the structure of a laser emitting assembly according to an embodiment of the present invention is shown.

[0026] Figure 4 A schematic diagram of the structure of a laser receiving assembly according to an embodiment of the present invention is shown.

[0027] The labels in the attached diagram are as follows:

[0028] 100. Housing; 110. Front housing; 111. Air intake; 120. Rear cover;

[0029] 200. Mainboard; 300. Main control unit; 400. Sensor control unit; 500. Sensor signal processing unit; 610. Optomechanical bracket; 610a. Connecting port; 611. Transmitter mounting plate; 612. Receiver mounting plate; 613. First side plate; 614. Second side plate; 620. Laser emitting assembly; 621. Transmitter; 622. Transmitting board; 630. Laser receiving assembly; 631. Receiver; 632. Receiver board; 700. Linkage unit; 800. Power supply unit; 810. Power socket; 900. Alarm drive unit; 1000. Communication unit. Detailed Implementation

[0030] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0031] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0032] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0033] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations.

[0034] Figure 1 An exploded view of a combustible gas detector according to an embodiment of the present invention is shown schematically. Figure 2 A schematic diagram of a combustible gas detector according to an embodiment of the present invention is shown. Figure 1 and Figure 2As shown, this utility model proposes a combustible gas detector, including a housing 100, a main board 200, and an optomechanical assembly. The housing 100 is provided with an air inlet 111, and the interior of the housing 100 is connected to the external environment through the air inlet 111. The main board 200 is disposed inside the housing 100. The optomechanical assembly includes an optomechanical bracket 610, a laser emitting component 620, and a laser receiving component 630. The optomechanical bracket 610 is connected to the main board 200, and the laser emitting component 620 and the laser receiving component 630 are respectively disposed at both ends of the optomechanical bracket 610.

[0035] In this technical solution, the combustible gas detector directly connects the optomechanical bracket 610, laser emitting component 620, and laser receiving component 630 to the main board 200, eliminating the need for a traditional laser sensor control board. Only the optomechanical components need to be assembled, reducing the structural complexity of the combustible gas detector. Since there is no internal laser sensor control board, the structure of the combustible gas detector is no longer limited by the positional requirements of the laser sensor control board, allowing for more flexible design of the overall layout and smoother gas flow. Understandably, this structural simplification greatly simplifies the production process, eliminating the need for laser sensor control board fabrication, assembly, testing, and calibration, thus reducing the manufacturing cost of the laser sensor and consequently lowering its factory cost.

[0036] Furthermore, the motherboard 200 is equipped with a main control unit 300, a sensor control unit 400, and a sensor signal processing unit 500. The sensor signal processing unit 500 and the sensor control unit 400 are connected by signals, the sensor control unit 400 and the main control unit 300 are connected by signals, the laser emitting component 620 and the sensor control unit 400 are connected by signals, and the laser receiving component 630 and the sensor signal processing unit 500 are connected by signals.

[0037] The integrated design of the above-described embodiment integrates the sensor control unit 400, the sensor signal processing unit 500, and the main control unit 300 into the motherboard 200 and is located inside the housing 100. Combining the sensor control unit 400, the sensor signal processing unit 500, and the main control unit 300 into one provides greater flexibility for algorithm optimization. During testing, only a single calibration test of the entire device is required, eliminating the need for separate calibration tests of the laser sensor as in existing technologies. This not only saves labor and time costs but also makes the calibration test results more accurate and closer to actual usage scenarios. Furthermore, this integrated design maximizes the reuse of similar functional units. While porting the original laser sensor control unit and sensor signal processing unit 500 to the motherboard 200 adds some peripheral circuitry to the motherboard 200, these are conventional circuits and do not significantly increase costs.

[0038] When the combustible gas detector is powered on and starts working, the sensor control unit 400 on the main board 200 controls the laser emitting component 620 to send laser signals according to certain rules. When combustible gas enters the housing 100 from the air inlet 111 and enters the interior of the optomechanical bracket 610, the laser signal will pass through the combustible gas in the optical path (the transmission path of the laser) to reach the laser receiving component 630. The combustible gas molecules will absorb some of the energy of the laser signal, causing the intensity of the laser signal received by the laser receiving component 630 to be attenuated. The laser receiving component 630 transmits the received laser signal to the sensor signal processing unit 500 on the main board 200. The sensor signal processing unit 500 can calculate the concentration value of the combustible gas inside the optomechanical bracket 610 and some control parameter feedback values ​​based on the laser signal attenuation, and send these results back to the sensor control unit 400. The sensor control unit 400 adjusts the intensity of the emitted laser signal according to the feedback value and outputs the concentration value to the main control unit 300, thereby realizing the function of detecting concentration.

[0039] Furthermore, the housing 100 includes a front housing 110 and a rear cover 120, with an air inlet 111 disposed on the front housing 110, and the rear cover 120 and the front housing 110 being sealed together. The front housing 110 has a receiving cavity, and the main board 200 is disposed inside the receiving cavity. The air inlet 111 includes a plurality of densely arranged square openings to ensure that combustible gas can enter the receiving cavity in the event of a leak.

[0040] Furthermore, the optical engine bracket 610 includes a transmitter mounting plate 611 and a receiver mounting plate 612 arranged opposite to each other, as well as a first side plate 613 and a second side plate 614 arranged opposite to each other. The transmitter mounting plate 611 and the receiver mounting plate 612 are connected through the first side plate 613 and the second side plate 614 and form a cavity. Both the first side plate 613 and the second side plate 614 are provided with a communication port 610a. The cavity is connected to the external environment through the communication port 610a. The laser emitting component 620 is mounted on the transmitter mounting plate 611, and the laser receiving component 630 is mounted on the laser receiving component 630. The transmitter mounting plate 611, the receiver mounting plate 612, the first side plate 613 and the second side plate 614 are all connected to the main board 200.

[0041] Optionally, the cavity can be constructed as an elongated space, with the transmitter mounting plate 611 and receiver mounting plate 612 located at opposite ends of the cavity's length. This arrangement extends the laser's optical path. Under the same combustible gas concentration, extending the laser's optical path increases the amount of laser absorption by the combustible gas, allowing the laser receiver component 630 to receive laser light with a larger variation, thus enabling the combustible gas detector to accurately detect the concentration of the combustible gas. Adjacent plates among the transmitter mounting plate 611, receiver mounting plate 612, first side plate 613, and second side plate 614 can be connected by adhesive bonding. Alternatively, the optomechanical bracket 610 can be a one-piece structure. Since this solution reduces the need for a traditional laser sensor control board, the transmitter mounting plate 611, receiver mounting plate 612, first side plate 613, and second side plate 614 can be directly connected to the main board 200, using methods such as adhesive bonding or plug-in connection.

[0042] Furthermore, Figure 3 A schematic diagram of the structure of a laser emitting assembly 620 according to an embodiment of the present invention is shown. See also Figure 1 and Figure 3 The laser emitting assembly 620 includes an emitter 621 and an emitting plate 622. The emitting plate 622 is signal-connected to the sensing control unit 400. The emitter 621 is mounted on and signal-connected to the emitting plate 622. A first mounting hole is provided on the emitting end mounting plate 611, and the emitter 621 passes through the first mounting hole facing the cavity. The emitting plate 622 is connected to the outside of the emitting end mounting plate 611. Optionally, the emitter 621 and the emitting plate 622 can be soldered together or connected by pins to form a whole, which can reduce the assembly difficulty of the laser emitting assembly 620 and the optomechanical bracket 610. Optionally, the emitting plate 622 can be fixed to the emitting end mounting plate 611 by screws.

[0043] Furthermore, Figure 4 A schematic diagram of the structure of a laser receiving assembly 630 according to an embodiment of the present invention is shown. See also: Figure 1 and Figure 4The laser receiving assembly 630 includes a receiver 631 and a receiving plate 632. The receiving plate 632 is signal-connected to the sensing signal processing unit 500. The receiver 631 is mounted on and signal-connected to the receiving plate 632. A second mounting hole is provided on the receiving end mounting plate 612, and the receiver 631 passes through the second mounting hole facing the cavity. The receiving plate 632 is connected to the outside of the receiving end mounting plate 612. Optionally, the receiver 631 and the receiving plate 632 can be soldered together or connected by pins to construct the receiver 631 and the receiving plate 632 as a whole, which can reduce the assembly difficulty of the laser receiving assembly 630 and the optomechanical bracket 610. Optionally, the receiving plate 632 can be fixed to the receiving end mounting plate 612 by screws.

[0044] Furthermore, the mainboard 200 is equipped with a linkage unit 700, which is signal-connected to the main control unit 300. The linkage unit 700 is used to output a valve-closing pulse signal. In the event of a combustible gas leak, the main control unit 300 controls the linkage unit 700 to output a valve-closing pulse signal, closing the solenoid valve or the internal valve of the gas meter, thereby preventing further gas leakage that could lead to dangerous accidents such as fire or explosion.

[0045] Furthermore, the motherboard 200 is equipped with a power supply unit 800, which includes a power socket 810. The power supply unit 800 is electrically connected to the sensor control unit 400, the sensor signal processing unit 500, the main control unit 300, the laser emitting component 620, and the laser receiving component 630, respectively. The power supply unit 800 is also electrically connected to an external power supply unit via the power socket 810. The power socket 810 is used to connect to a plug, thereby connecting the power supply unit 800 to 220V AC power.

[0046] Furthermore, this solution also provides a combustible gas detection system, which includes the combustible gas detector described in the above embodiments.

[0047] Furthermore, the combustible gas detection system also includes an alarm component, see [link to relevant documentation]. Figure 2 The motherboard 200 is equipped with an alarm drive unit 900, which is signal-connected to a combustible gas detector. The alarm drive unit 900 is used to drive the alarm component to sound an alarm. Optionally, the alarm component is connected to the outer wall of the housing 100, and the alarm drive unit 900 is signal-connected to the main control unit 300. When there is a combustible gas leak, the main control unit 300 will control the alarm drive unit 900, which will then cause the alarm component to sound an alarm.

[0048] Furthermore, the combustible gas detection system also includes a monitoring platform. A communication unit 1000 is installed on the mainboard 200, which is signal-connected to the combustible gas detector. The communication unit 1000 is used to send monitoring data to the monitoring platform. Optionally, the communication unit 1000 is signal-connected to the main control unit 300. The monitoring platform is typically the gas company's control system. Users can also be notified via SMS or WeChat.

[0049] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A combustible gas detector, characterized in that, include: A housing (100) is provided with an air inlet (111), and the interior of the housing (100) is connected to the external environment through the air inlet (111); A motherboard (200) is disposed inside the housing (100); The optical-mechanical assembly includes an optical-mechanical bracket (610), a laser emitting component (620), and a laser receiving component (630). The optical-mechanical bracket (610) is connected to the motherboard (200), and the laser emitting component (620) and the laser receiving component (630) are respectively disposed at both ends of the optical-mechanical bracket (610).

2. The combustible gas detector according to claim 1, characterized in that, The motherboard (200) is provided with a main control unit (300), a sensor control unit (400) and a sensor signal processing unit (500). The sensor signal processing unit (500) and the sensor control unit (400) are connected by signal. The sensor control unit (400) and the main control unit (300) are connected by signal. The laser emitting component (620) and the sensor control unit (400) are connected by signal. The laser receiving component (630) and the sensor signal processing unit (500) are connected by signal.

3. The combustible gas detector according to claim 2, characterized in that, The optical engine bracket (610) includes a transmitter mounting plate (611) and a receiver mounting plate (612) arranged opposite to each other, as well as a first side plate (613) and a second side plate (614) arranged opposite to each other. The transmitter mounting plate (611) and the receiver mounting plate (612) are connected by the first side plate (613) and the second side plate (614) and form a cavity. Both the first side plate (613) and the second side plate (614) are provided with a communication port (610a). The cavity is connected to the external environment through the communication port (610a). The laser emitting component (620) is disposed on the transmitter mounting plate (611), and the laser receiving component (630) is disposed on the laser receiving component (630). The transmitter mounting plate (611), the receiver mounting plate (612), the first side plate (613) and the second side plate (614) are all connected to the main board (200).

4. The combustible gas detector according to claim 3, characterized in that, The laser emitting assembly (620) includes an emitter (621) and an emitting plate (622). The emitting plate (622) is signal-connected to the sensing control unit (400). The emitter (621) is disposed on the emitting plate (622) and signal-connected to the emitting plate (622). A first mounting hole is provided on the emitting end mounting plate (611). The emitter (621) passes through the first mounting hole towards the cavity. The emitting plate (622) is connected to the outside of the emitting end mounting plate (611).

5. The combustible gas detector according to claim 3, characterized in that, The laser receiving assembly (630) includes a receiver (631) and a receiving plate (632). The receiving plate (632) is signal-connected to the sensing signal processing unit (500). The receiver (631) is disposed on the receiving plate (632) and signal-connected to the receiving plate (632). A second mounting hole is provided on the receiving end mounting plate (612). The receiver (631) passes through the second mounting hole facing the cavity. The receiving plate (632) is connected to the outside of the receiving end mounting plate (612).

6. The combustible gas detector according to any one of claims 2-5, characterized in that, The main board (200) is provided with a linkage unit (700), which is signal connected to the main control unit (300). The linkage unit (700) is used to output a valve closing pulse signal.

7. The combustible gas detector according to any one of claims 2-5, characterized in that, The motherboard (200) is provided with a power supply unit (800), which includes a power socket (810). The power supply unit (800) is electrically connected to the sensor control unit (400), the sensor signal processing unit (500), the main control unit (300), the laser emitting component (620), and the laser receiving component (630), respectively. The power supply unit (800) is electrically connected to an external power supply unit through the power socket (810).

8. A combustible gas detection system, characterized in that, Including the combustible gas detector according to any one of claims 1-7.

9. The combustible gas detection system according to claim 8, characterized in that, The combustible gas detection system also includes an alarm component. An alarm drive unit (900) is provided on the main board (200). The alarm drive unit (900) is signal-connected to the combustible gas detector. The alarm drive unit (900) is used to drive the alarm component to sound an alarm.

10. The combustible gas detection system according to claim 9, characterized in that, The combustible gas detection system also includes a monitoring platform. A communication unit (1000) is provided on the motherboard (200). The communication unit (1000) is signal-connected to the combustible gas detector. The communication unit (1000) is used to send monitoring data to the monitoring platform.

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