Household gas alarm

Abstract

The utility model discloses a household fuel gas alarm. The household fuel gas alarm comprises a shell; the rear cover is connected with the shell; the mounting plate is detachably connected to the rear cover, and the mounting plate comprises an oil-resistant grating air inlet structure; the detection device is arranged in the shell, and the detection device comprises a detection gas chamber and is used for detecting the concentration of natural gas; and the alarm module is arranged in the shell. According to the scheme provided by the utility model, by adopting back air intake and arranging an oil-stain-resistant grating air intake structure, oil stain and dust can be effectively prevented from entering the household gas alarm; in addition, a detachable design is adopted in the scheme of the invention, so that the detection air chamber is convenient to clean; meanwhile, the mounting plate integrates the functions of mounting, oil stain prevention and gas inlet, so that the detection precision of the household gas alarm can be improved, and the service life of the household gas alarm can be prolonged.

Description

Technical Field

[0001] This disclosure generally relates to the technical field of alarm devices. More specifically, this disclosure relates to a household gas alarm. Background Art

[0002] A gas alarm is a device used to detect the concentration of combustible gases in the environment. When the detected gas concentration exceeds a preset safety threshold, the device will emit an alarm to remind users to take corresponding safety measures. Such devices are widely used in household, commercial, and industrial environments to prevent fire or explosion accidents caused by gas leakage. Gas alarms mainly detect combustible gases in the air through sensors. These sensors can sense the presence of specific gases and convert this sensing into electrical signals, which are then processed by a microcontroller or other control units. If the concentration exceeds the set safety level, the alarm mechanism will be triggered.

[0003] Currently, the detection gas chamber of a household gas alarm is generally located inside the product, and gas can enter the detection gas chamber through the air intake holes on the housing of the household gas alarm. However, this design has many problems during use. First, kitchen oil stains and dust are easily introduced into the detection gas chamber through the air intake holes, resulting in a decrease in the detection accuracy of the detector. Second, after long-term use, oil stains and dust will accumulate at the air intake holes of the household gas alarm, hindering the circulation of gas inside and outside the detection gas chamber, resulting in detection failure. Due to the foregoing reasons, the household gas alarm may experience false alarms or missed alarms, affecting its reliability and service life. Further, the detection gas chamber of conventional products is located inside the alarm and cannot be disassembled, making it difficult to clean and maintain the detection gas chamber. In addition, in traditional designs, the air intake holes are usually set on the front of the product, thus affecting the overall aesthetics of the product.

[0004] In view of this, there is an urgent need to provide a household gas alarm that can effectively prevent oil stains and dust from entering the interior of the household gas alarm, thereby effectively improving the detection accuracy, service life, and aesthetics of the household gas alarm. Summary of the Utility Model

[0005] In order to solve at least one or more of the above-mentioned technical problems, this disclosure proposes a solution for a household gas alarm in multiple aspects.

[0006] In a first aspect, this disclosure provides a household gas alarm, comprising: a housing; a rear cover connected to the housing; a mounting plate detachably connected to the rear cover, wherein the mounting plate includes an anti-oil-stain grille air intake structure; a detection device disposed inside the housing, the detection device including a detection gas chamber for detecting the concentration of natural gas; and an alarm module disposed inside the housing.

[0007] In some embodiments, the anti-oil and -dirt grille air intake structure includes a plurality of grille bars, wherein the grille bars are of an asymmetric shape.

[0008] In some embodiments, the grille bars are inclined upward to prevent oil, dirt, and dust from entering the detection gas chamber. The grille bars include a first width and a second width, with the first width being greater than the second width. The first width is in the direction close to the outside of the domestic gas alarm, and the second width is in the direction close to the inside of the domestic gas alarm.

[0009] In some embodiments, the domestic gas alarm further includes an information acquisition and processing module, which is disposed inside the housing and electrically connected to the detection device for acquiring and processing the detection information of the detection device.

[0010] In some embodiments, the alarm module is communicatively connected to the information acquisition and processing module for emitting an alarm signal according to the control of the information acquisition and processing module.

[0011] In some embodiments, the detection device is a laser detection device, which includes a laser emitter, a photoelectric receiver, and a detection board. The detection board is integrated with a signal processing circuit, and the detection board is configured to receive and process the signal transmitted by the photoelectric receiver.

[0012] In some embodiments, the rear cover is detachably connected to the mounting plate in a rotational manner. The rear cover includes a plurality of card slots, and the mounting plate includes a plurality of rotational latches that cooperate with the card slots.

[0013] In some embodiments, the mounting plate is provided with mounting holes for fixing to a wall surface. A gap is reserved between the mounting plate and the wall surface for gas to enter.

[0014] In some embodiments, the domestic gas alarm further includes a panel, which is disposed on the housing. The panel is provided with a light guide column and a button.

[0015] In some embodiments, the alarm module includes a buzzer and an indicator light. The light guide column is connected to the indicator light for transmitting the light of the indicator light.

[0016] With a household gas alarm provided as above, the embodiments of the present utility model have significant technical advantages. First, by adopting back air intake and setting an anti-oil-and-dust grille air intake structure, the solution of the present utility model can effectively prevent oil stains and dust from entering the interior of the household gas alarm, and the upward inclination design of the grid bars further enhances the anti-oil-and-dust and dust-proof effects. Second, the detachable design enables users to directly clean the detection device, reducing the cleaning difficulty and facilitating the long-term stable operation of the device. Further, the multi-functional integrated mounting plate not only has a mounting function but also integrates anti-oil-and-dust and air intake functions, achieving structural simplification and function integration. These features significantly improve the detection accuracy and service life of the household gas alarm.

[0017] In addition, the solution of the present utility model also has outstanding improvements in terms of appearance and use. The back air intake design enables the front of the product to have no air intake holes and channels, resulting in better integrity and a more concise and beautiful appearance. The design of the fixing holes and reserved gaps on the mounting plate not only ensures the installation stability but also does not affect gas detection. Further, the multiple alarm mechanisms provide an alarm method combining sound and light, enhancing the alarm effect. This design is applicable to various household environments, especially places prone to oil stains such as kitchens, improving the application range and practicability of the product. Generally speaking, the present utility model effectively solves the problems existing in the prior art and provides users with a safer, more reliable, and easier-to-maintain household gas alarm. Description of the Drawings

[0018] By referring to the following detailed description with reference to the accompanying drawings, the above and other objects, features, and advantages of the exemplary embodiments of the present disclosure will become readily understandable. In the drawings, several embodiments of the present disclosure are shown in an exemplary rather than restrictive manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0019] Figure 1 Shows an exemplary structural diagram of a household gas alarm according to an embodiment of the present utility model;

[0020] Figure 2 Shows a cross-sectional view of a household gas alarm according to an embodiment of the present utility model;

[0021] Figure 3 Shows an exemplary structural diagram of the mounting plate of a household gas alarm according to an embodiment of the present utility model;

[0022] Figure 4 Shows an exemplary structural diagram of the grid bars of the anti-oil-and-dust grille air intake structure of a household gas alarm according to an embodiment of the present utility model;

[0023] Figure 5 Shows an exemplary structural diagram of the rear cover of a household gas alarm according to an embodiment of the present utility model.

[0024] Figure 6 Shows the three views of a household gas alarm according to an embodiment of the present utility model.

[0025] In the figure: 101, housing; 102, rear cover; 103, mounting plate; 104, detection device; 105, alarm module; 106, information acquisition and processing module; 107, intermediate layer; 108, panel;

[0026] 1021, circuit board; 1022, card slot;

[0027] 1031, anti-oil pollution grille air intake structure; 1032, rotary buckle; 1033, mounting hole;

[0028] 1051, buzzer; 1052, indicator light;

[0029] 1081, light guide column; 1082, button. Specific embodiments

[0030] Next, the technical solutions in the embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present disclosure.

[0031] It should be understood that the terms "including" and "comprising" used in the specification and claims of the present disclosure indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0032] It should also be understood that the terms used in the present disclosure specification are only for the purpose of describing specific embodiments, and are not intended to limit the present disclosure. As used in the present disclosure specification and claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to include the plural forms. It should also be further understood that the term " / and / " used in the present disclosure specification and claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0033] As used in this specification and the claims, the term "if" can be interpreted as "when" or "once" or "in response to determining" or "in response to detecting" depending on the context. Similarly, the phrase "if determined" or "if [described condition or event] is detected" can be interpreted as meaning "once determined" or "in response to determining" or "once [described condition or event] is detected" or "in response to detecting [described condition or event]" depending on the context.

[0034] The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0035] Figure 1 An exemplary structural diagram of a household gas alarm according to an embodiment of the present utility model is shown. As Figure 1 shown, the household gas alarm may include a housing 101, a rear cover 102, a mounting plate 103, a detection device 104, an alarm module 105, an information collection and processing module 106, an intermediate layer 107, and a panel 108. These components together constitute a complete household gas alarm system, and each part has its corresponding function and role. The housing 101, rear cover 102, mounting plate 103, detection device 104, alarm module 105, information collection and processing module 106, intermediate layer 107, and panel 108 described above will be described in detail below.

[0036] In one embodiment, the aforementioned mounting plate 103 may include an anti-oil-and-dust grille air intake structure 1031, a plurality of rotary latches 1032, and mounting holes 1033 for fixing to a wall surface. Among them, the aforementioned anti-oil-and-dust grille air intake structure 1031 (regarding its specific structure, it will be described later in combination with Figure 3 and Figure 4 can include a plurality of grid bars. These grid bars are designed to be inclined upward to form an asymmetric shape, effectively preventing oil stains and dust from entering the detection gas chamber. The aforementioned anti-oil-and-dust grille air intake structure 1031 can also be used to receive the gas in the environment for concentration detection. One end of the aforementioned mounting plate 103 can be connected to the rear cover 102. This back-air intake design enables the front of the product to have no air intake holes and channels, thereby improving the integrity and aesthetics. In one embodiment, the other end of the aforementioned mounting plate 103 can be fixedly connected to the wall surface. Specifically, the aforementioned mounting plate 103 can fixedly connect the household gas alarm to the wall surface through the aforementioned mounting holes 1033. There can be a gap between the mounting plate and the aforementioned wall surface, for example, it can be 3 to 5 millimeters, for the gas to enter. This design not only ensures the stability of the installation but also does not affect the gas detection.

[0037] In one embodiment, the aforementioned fixed connection may include using a spike fixing method, an embedded fixing method, an anchor bolt reinforcement method, a nail shooting fixing method, or an expansion bolt fixing method. The specific selection can be determined according to the material of the installation wall and the actual situation. In one embodiment, the aforementioned mounting plate 103 is detachably connected to the aforementioned rear cover 102. Among them, the aforementioned mounting plate 103 and the rear cover 102 can be detachably connected by any one of screw connection, pin connection, key connection, hinge connection, elastic deformation connection, lock connection, or snap connection. Preferably, in one embodiment, the aforementioned mounting plate 103 and the rear cover 102 can be detachably connected through a rotary snap 1032 and a slot 1022. This connection method is simple to operate and convenient for users to disassemble and clean.

[0038] In one embodiment, the aforementioned rear cover 102 can be connected to the aforementioned housing 101. In one embodiment, a circuit board 1021 can also be provided on the aforementioned rear cover 102. Among them, the aforementioned circuit board 1021 may include a PCB circuit board. The aforementioned PCB circuit board is mainly used to provide electrical connections between circuit components and support the aforementioned components at the same time. It has high reliability and stability, can withstand high temperature, high humidity, and other environmental changes, and can stably support the operation of electronic components. It can be applied to the high-temperature and high-humidity environment in the kitchen. Further, due to the high integration of the PCB circuit board, the PCB circuit board can accommodate more circuits in a smaller space and can be applied to the solution of the present invention, effectively reducing the overall volume of the device. In one embodiment, the aforementioned rear cover may further include a plurality of slots 1022, and the aforementioned slots 1022 can be cooperatively connected with the rotary snaps 1032 on the aforementioned mounting plate 103 to form a stable and easily detachable structure.

[0039] In one embodiment, the detection device 104 is disposed within the aforementioned housing 101. The aforementioned detection device 104 may include a detection gas chamber for detecting the concentration of natural gas. Among them, the aforementioned detection device 104 may be a semiconductor combustible gas detection device. Specifically, the detection device can collect gas and convert the gas volume fraction into a voltage signal. Then, after being processed by an analog / digital conversion circuit and a single-chip microcomputer, it controls the display unit to display the gas volume fraction and triggers an audible and visual alarm when necessary. The aforementioned detection device 104 may also be a detection device based on temperature-flow detection. By combining the detection of temperature and flow, it can more accurately determine whether a gas leak has occurred, thereby reducing the false alarm rate. In one embodiment, the aforementioned detection device 104 may further include a laser detection device. The aforementioned laser detection device may include a laser emitter, a photoelectric receiver, and a detection board. The detection board is integrated with a signal processing circuit, and the detection board can be used to receive and process the signal transmitted by the photoelectric receiver. Among them, the aforementioned laser emitter is used to emit laser light of a specific wavelength, usually in the near-infrared band (such as 1.65 μm). The aforementioned photoelectric receiver can be used to receive the laser light emitted by the laser emitter and propagated through the gas. The aforementioned signal processing circuit can be used to process the received optical signal to detect and judge the concentration of natural gas in the gas. This laser detection method of the present utility model has higher sensitivity and selectivity and can detect a methane concentration of 3% of the Lower Explosion Limit (LEL).

[0040] In one embodiment, the aforementioned information acquisition and processing module 106 is disposed within the aforementioned housing 101. Specifically, the aforementioned information acquisition and processing module 106 may be disposed on the aforementioned circuit board 1021 and is electrically connected to the detection device 104 for acquiring and processing the detection information of the aforementioned detection device. As an example, this module may include a microprocessor and an analog-to-digital converter, capable of real-time processing of signals from the detection device. It can also perform data analysis, threshold comparison, and judge whether an alarm needs to be triggered according to a preset algorithm. In addition, this module can also store historical data for subsequent maintenance and analysis.

[0041] In one embodiment, the aforementioned alarm module 105 is disposed within the housing 101. It may include a buzzer 1051 and an indicator light 1052, such as Figure 1As shown, the aforementioned buzzer 1051 and indicator light 1052 can be respectively arranged on the middle layer 107. Among them, the aforementioned buzzer 1051 is set to emit a harsh alarm sound when the natural gas or smoke concentration exceeds the set threshold (usually 10% LEL), and the sound pressure level can reach more than 85 decibels to ensure that users can detect it in time; the aforementioned indicator light 1052 can include multiple working states, and it can be set to flash in different ways in different states. Specifically, the aforementioned multiple working states can include a normal working state, a low battery warning state, and an alarm state. In the normal working state, the aforementioned indicator light can be set to flash in a regular manner (for example, flash once every 1 minute, such as green light); when the indicator light is in a low battery state (for example, the battery power is lower than 20%), it can be set to keep flashing continuously (such as yellow light), and be accompanied by the beeping sound of the buzzer to remind the user to replace the battery; when the alarm detector detects that the natural gas or smoke concentration reaches the set threshold, the alarm is in the alarm state, and it can be set to make the indicator light flash quickly (such as red light, for example, flash 4 times per second), and the buzzer continuously emits an alarm sound to attract the user's attention. In one embodiment, the aforementioned alarm module 105 can be communicatively connected to the aforementioned information collection and processing module 106, and is used to send an alarm signal according to the control of the information collection and processing module. Such a design can ensure the accuracy and timeliness of the alarm.

[0042] In one embodiment, the aforementioned panel 108 can be arranged on the aforementioned housing 101. Among them, a light guide column 1081 and a button 1082 can be provided on the aforementioned panel 108, and the aforementioned light guide column 1081 can be used to transmit light. Specifically, the aforementioned light guide column 1081 can transmit the light of the indicator light 1052. The design of the light guide column 1081 can enhance the visibility of the light, enabling users to clearly see the state of the indicator light from all angles. In one embodiment, the aforementioned indicator light 1052 can be constantly on in green to indicate that the household gas alarm is working normally; the aforementioned indicator light 1052 can flash in red to alarm that the natural gas or smoke concentration exceeds the preset value, which may affect physical health; the aforementioned indicator light 1052 can also be constantly on in yellow to indicate that the household gas alarm has a fault and needs to be repaired or the aforementioned detection chamber needs to be cleaned. It can be understood that the light guide column 1081 can be used to transmit the light of the indicator light 1052. Therefore, when the indicator light 1052 is on in green, red, or yellow, the light guide column 1081 can be on in green, red, or yellow accordingly. In addition, the button 1082 can include a self-check button and a silencing button. The self-check button can be used to manually trigger the device self-check program, and the silencing button can temporarily turn off the sound alarm in the alarm state (for example, usually for 5 minutes).

[0043] Figure 2Shows a cross-sectional view of a household gas alarm according to an embodiment of the present utility model. As Figure 2 shown, the aforementioned mounting plate 103 can be located at the rear side of the household gas alarm, and it can include a plurality of rotary latches 1032 and mounting holes 1033 for fixing on the wall surface. In one embodiment, a gap can be reserved between the aforementioned mounting plate 103 and the aforementioned wall surface, usually 3.5 millimeters, for gas to enter. This design not only ensures the stable installation of the device but also does not affect the normal detection of gas.

[0044] In one embodiment, the aforementioned rear cover 102 can include a plurality of card slots 1022. Through the cooperation of the aforementioned card slots 1022 and the rotary latches 1032, one side of the aforementioned rear cover 102 can be detachably connected to the aforementioned mounting plate 103, so that the rear cover 102 can be quickly and conveniently disassembled to facilitate the cleaning operation of the household gas alarm. This rotary latch design can usually achieve 90-degree rotation for locking or unlocking, and the operation is simple and intuitive. According to Figure 2 the shown structure, it can be understood that when the aforementioned rear cover 102 is disassembled, the aforementioned detection device 104 can be directly exposed to the air. When it is necessary to clean the detection device 104, the detection device 104 exposed to the air can be directly cleaned by disassembling the aforementioned rear cover 102, thus reducing the cleaning difficulty. Further, by cleaning the aforementioned detection device 104, the detection accuracy of the household gas alarm can be effectively improved, and the service life of the device can be extended.

[0045] In one embodiment, the other side of the aforementioned rear cover 102 can be jointly connected to the aforementioned housing 101 with the middle layer 107 by screws, wherein a buzzer 1051 and an indicator light 1052 can be provided on the aforementioned middle layer 107. This layered design can effectively isolate electronic components and improve the reliability and durability of the device. In one embodiment, the aforementioned buzzer 1051 is set to emit a harsh alarm sound when the concentration of natural gas or smoke exceeds a set threshold, and the sound pressure can reach more than 85 decibels; the aforementioned indicator light 1052 can include multiple working states, and it can be set to flash in different ways in different states, as described above. In one embodiment, the aforementioned panel 108 can be arranged in the aforementioned housing 101, wherein a light guide column 1081 and a button 1082 can be provided on the aforementioned panel 108, and the aforementioned light guide column 1081 can be used for transmitting light. In one embodiment, the aforementioned light guide column 1081 can be connected to the aforementioned indicator light 1052 to transmit the light of the aforementioned indicator light 1052 to the outside of the household gas alarm, enhancing the visibility of the indicator light and enabling users to clearly see the working state of the device from all angles.

[0046] Figure 3Shows an exemplary structural diagram of the mounting plate 103 of a household gas alarm according to an embodiment of the present utility model. Figure 4 Shows a structural diagram of the bars of the anti-oil and anti-dirt grille air intake structure 1031 of a household gas alarm according to an embodiment of the present utility model. The following will be combined with Figure 3 and Figure 4 to give an exemplary description of the aforementioned mounting plate.

[0047] As Figure 3 and Figure 4 shown, the present utility model provides a mounting plate 103, which may include an anti-oil and anti-dirt grille air intake structure 1031, a plurality of rotating buckles 1032, and mounting holes 1033 for fixing to the wall. This design integrates multiple functions, ensuring both the stable installation of the device and achieving the purposes of anti-oil and anti-dirt and easy disassembly. In one embodiment, the aforementioned anti-oil and anti-dirt grille air intake structure 1031 may include a plurality of bars, wherein the aforementioned bars may be of an asymmetric shape, which may include a first width D and a second width d, wherein the first width D may be greater than the second width d. For example, the first width D may be 1.5 - 2.5 mm, and the second width d may be 0.5 - 1.5 mm. Such a design can effectively block most of the oil and dust while ensuring sufficient gas flow. In one embodiment, the shape of the aforementioned bars may be a long and narrow through-hole, and the aforementioned bars may be arranged as bars with different widths on the surfaces at both ends of the through-hole. The aforementioned first width D may be the width of the bar in the direction close to the outside of the household gas alarm, and the aforementioned second width d may be the width of the bar in the direction close to the inside of the household gas alarm. In one embodiment, the aforementioned bars may be inclined upward, and the inclination angle may be, for example, 15 - 30 degrees, for preventing oil and dust from entering the aforementioned detection gas chamber. In one embodiment, the aforementioned plurality of bars may be a group of parallel bars, and the spacing between the bars may be 2 - 4 mm to ensure sufficient gas flow. In one embodiment, the aforementioned anti-oil and anti-dirt grille air intake structure 1031 may also be used to collect the gas in the environment for concentration detection.

[0048] It can be understood that, for the anti-oil pollution air intake structure according to the embodiments of the present utility model, during the use of the household gas alarm, since the grid bars are designed to be inclined upward and the first width D is greater than the second width d (that is, the width of the grid bars near the outer side of the household gas alarm is greater than the width of the grid bars near the inner side of the household gas alarm, forming a structure of "larger outside and smaller inside"), larger oil droplets or oil stains in the air will be blocked outside the household gas alarm. In one embodiment, the household gas alarm can use oil-repellent materials, such as polyurethane foam materials or polytetrafluoroethylene (PTFE) coatings. Through the design of the foregoing grid bar structure and the selection of the materials of the household gas alarm, oil stains and dust can be effectively blocked from entering the detection gas chamber, thereby improving the detection accuracy of the household gas alarm, extending the service life of the device, and reducing the maintenance frequency.

[0049] The multiple rotating buckles 1032 on the foregoing mounting plate can be detachably connected to the card slots 1022 on the foregoing rear cover in a rotating manner, and the rear cover can be disassembled conveniently and quickly for cleaning operations. This rotating buckle design can usually achieve 90-degree rotation locking or unlocking, with simple and intuitive operation, and disassembly and assembly can be completed without tools, greatly facilitating the daily maintenance of users.

[0050] The foregoing wall fixing mounting holes 1033 are used to fixedly connect the household gas alarm to the wall. Among them, the foregoing wall fixing mounting holes 1033 can be circular holes, and the diameter can be, for example, 5-8 mm, and the stress can be more evenly distributed when stressed, thereby improving the overall stability of the structure. In one embodiment, a gap is reserved between the foregoing mounting plate and the foregoing wall for gas to enter. This design not only ensures the stable installation of the device but also does not affect the normal detection of gas.

[0051] The above combination Figure 3 and Figure 4 has made an exemplary description of the household sensor according to the embodiments of the present utility model. It can be understood that the illustration in the figure is exemplary rather than restrictive. For example, the number of grid bars may not be limited to the 3 groups shown in the illustration, and can also be set more as needed, such as 5-7 groups, to further improve the anti-oil pollution effect. In addition, the specific shape and size of the grid bars can also be appropriately adjusted according to the actual application scenario to achieve the best anti-oil pollution and gas detection effects.

[0052] Figure 5 shows an exemplary structural diagram of the rear cover 102 of the household gas alarm according to the embodiments of the present utility model. As Figure 5 shown, the foregoing rear cover 102 can be provided with a circuit board 1021, a card slot 1022, and a detection device 104. This integrated design not only improves the space utilization rate but also facilitates assembly and maintenance.

[0053] The above detection device 104 may include a detection gas chamber for detecting the concentration of natural gas. The volume of the detection gas chamber is usually 6 cubic centimeters to ensure an adequate gas sample. In one embodiment, the aforementioned detection device may be a laser detection device. Among them, the aforementioned laser detection device may include a laser emitter, a photoelectric receiver, and a detection board. The detection board is integrated with a signal processing circuit. Among them, the detection board is used to receive the signal transmitted by the photoelectric receiver and process it. Among them, the aforementioned laser emitter is used to emit a laser with a specific wavelength, usually in the near-infrared band (such as 1.65 μm), and the power is about 400 mW; the aforementioned photoelectric receiver can be used to receive the laser emitted by the laser emitter and passing through the gas; the aforementioned signal processing circuit can be used to process the received optical signal to detect and judge the concentration of natural gas in the gas. The aforementioned circuit board 1021 may include a PCB circuit board. Among them, an information acquisition and processing module 106 may be provided on the aforementioned PCB circuit board. The information acquisition and processing module 106 may be electrically connected to the aforementioned detection device 104 for acquiring and processing the detection information of the aforementioned detection device. In one embodiment, the aforementioned card slot 1022 may be cooperatively connected with the rotary buckle 1032 on the aforementioned mounting plate 103, so that the aforementioned rear cover 102 and the aforementioned mounting plate 103 are detachably connected by rotation. This rotary buckle design can achieve 90-degree rotation locking or unlocking, and the operating torque is controlled within a certain range, which not only ensures the firmness of the connection but also ensures the convenience of operation.

[0054] Figure 6 Shows the three views of the household gas alarm according to the embodiment of the present invention. As Figure 6 shown, a button 1082 may be provided on the panel 108 of the aforementioned household gas alarm. The aforementioned button 1082 may include a self-check button and a mute button. Among them, the aforementioned self-check button may be used to detect whether the internal sensor of the household gas alarm is working properly. In the normal state, after pressing the self-check button, the device will send a test signal to the sensor to verify whether it can work properly. The aforementioned mute button may be used to turn off the alarm sound or fault sound. In the alarm state, pressing the mute button once can mute temporarily, and the mute state can last for a preset time (usually 5 minutes). After the preset time arrives, it can exit automatically or press the mute button again to exit. Through such a design, while ensuring safety, unnecessary noise interference can be avoided.

[0055] In one embodiment, the foregoing panel may further include a light guide column 1081, which can be used to propagate light. Specifically, the foregoing light guide column 1081 may be connected to the foregoing indicator light 1052 to propagate the light of the indicator light 1052. The light guide column can be made of PC material, with a length of about 3.5 mm and a diameter of 2.8 mm to provide good light conduction effect. In one embodiment, the foregoing indicator light 1052 may be constantly on in green to indicate that the household gas alarm is working properly; the foregoing indicator light 1052 may blink in red (such as blinking 4 times per second) to alarm that the concentration of natural gas or smoke exceeds the preset value (usually 10% LEL), which may have an impact on physical health; the foregoing indicator light 1052 may also be constantly on in yellow to indicate that the household gas alarm has a fault and needs to be repaired or the foregoing detection chamber needs to be cleaned. It can be understood that the light guide column 1081 is used to propagate the light of the indicator light 1052. Therefore, when the indicator light 1052 is on in green, red or yellow, the light guide column 1081 can be on in green, red or yellow correspondingly. This design can ensure that users can clearly see the working state of the device from all angles.

[0056] In one embodiment, the foregoing housing 101 may be set to a cylindrical shape, with a diameter of about 100 mm and a height of about 30 mm to provide sufficient internal space while maintaining aesthetics. The foregoing rear cover 102, middle layer 107, and panel 108 are arranged inside the foregoing housing 101. Further, one side of the mounting plate 103 may be connected to the foregoing rear cover 102, and the other side of the mounting plate may be fixedly connected to the wall through the mounting holes 1033. The diameter of the mounting holes is usually 5 - 8 mm to adapt to common expansion bolts. This design not only ensures the stable installation of the device, but also facilitates disassembly and cleaning, and at the same time ensures the normal flow and detection of gas by reserving a gap of 3 - 5 mm.

[0057] This implementation solution ensures that gas can smoothly enter the device for detection by reserving a gap of, for example, 3 - 5 millimeters between the mounting plate and the wall. This design not only ensures the accuracy of detection, but also avoids detection dead - angles that may be caused by the device being closely attached to the wall. When gas enters the household gas alarm, by setting an anti - oil - stain grille intake structure on the rear cover 102 and setting the grille to be inclined upward, it can effectively prevent oil stains and dust from entering the interior of the household gas alarm while not affecting the normal flow of gas. In addition, using an oil - repellent material such as a polytetrafluoroethylene (PTFE) coating further enhances the anti - oil - stain effect.

[0058] In addition, the mounting plate 103 of this solution is fixedly connected to the wall surface, while the mounting plate 103 is detachably connected to the rear cover 102. This design allows users to easily remove the rear cover by rotating it 90 degrees without removing the entire device. Therefore, when it is necessary to clean the detection device of the household gas alarm, it can be disassembled first and then cleaned, which facilitates the cleaning operation, greatly reduces the maintenance difficulty, and thus can improve the detection accuracy of the household gas alarm.

[0059] Although several embodiments of the present disclosure have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many variations, changes, and alternative ways may occur to those skilled in the art without departing from the spirit and scope of the present disclosure. It should be understood that various alternatives to the embodiments of the present disclosure described herein may be employed in practicing the present disclosure. The appended claims are intended to define the scope of the present disclosure and thus cover equivalents or alternatives within the scope of these claims.

Claims

1. A household gas alarm, characterized in that: include: Housing (101); A rear cover (102) connected to the housing (101); A mounting plate (103) detachably connected to the rear cover (102), wherein the mounting plate (103) comprises an anti-oil grille air intake structure (1031); A detection device (104) is disposed in the housing (101), wherein the detection device (104) comprises a detection gas chamber for detecting the concentration of natural gas; and An alarm module (105) is arranged in the housing (101).

2. The household gas alarm according to claim 1, characterized in that: The anti-oil and dirt grille air intake structure (1031) comprises a plurality of bars, wherein the bars are asymmetrical in shape.

3. The household gas alarm according to claim 2, characterized in that: The grating is inclined upward to prevent oil and / or dust from entering the detection air chamber, wherein the grating includes a first width (D) and a second width (d), the first width (D) is greater than the second width (d), the first width (D) is located close to the outside of the household gas alarm, and the second width (d) is located close to the inside of the household gas alarm.

4. The household gas alarm according to claim 1, characterized in that: It also includes an information collection and processing module (106), which is arranged in the housing (101) and electrically connected to the detection device (104) and is used to collect and process detection information of the detection device (104).

5. The household gas alarm according to claim 4, characterized in that: The alarm module (105) is communicatively connected to the information acquisition and processing module (106) and is used to issue an alarm signal according to the control of the information acquisition and processing module (106).

6. The household gas alarm according to claim 1, characterized in that: The detection device (104) is a laser detection device, wherein the laser detection device comprises a laser transmitter, a photoelectric receiver and a detection board, wherein the detection board is integrated with a signal processing circuit, wherein the detection board is used to receive and process the signal transmitted by the photoelectric receiver.

7. The household gas alarm according to claim 1, characterized in that: The rear cover (102) and the mounting plate (103) are detachably connected by rotation, wherein the rear cover (102) includes a plurality of card slots (1022), and the mounting plate (103) includes a plurality of rotating buckles (1032) that cooperate with the card slots (1022).

8. The household gas alarm according to claim 1, characterized in that: The mounting plate (103) is provided with a mounting hole (1033) for fixing to a wall surface, wherein a gap is reserved between the mounting plate (103) and the wall surface for gas to enter.

9. The household gas alarm according to claim 1, characterized in that: It also comprises a panel (108), which is arranged on the housing (101), wherein a light guide column (1081) and a button (1082) are provided on the panel (108).

10. The household gas alarm according to claim 9, characterized in that: The alarm module (105) comprises a buzzer (1051) and an indicator light (1052), wherein the light guide column (1081) is connected to the indicator light (1052) and is used to spread the light of the indicator light (1052).

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