A gas alarm with convenient wiring

Abstract

This application relates to a gas alarm with convenient wiring, belonging to the technical field of gas alarms. The gas alarm includes: a base mounted on a wall, with a cavity inside and a circular inlet / outlet interface on the lower side wall for mounting a waterproof locking head; an interface circuit board mounted on one side of the cavity, with wiring terminals installed on the circuit board; a detection chamber integrally formed on the other side of the cavity, for mounting a sensor, with air inlet louvers communicating with the outside on the bottom and lower side wall of the detection chamber; a sensor circuit board sealed and mounted on the detection chamber, connected to a sensor; a top cover sealed to the base; and a main control circuit board mounted inside the top cover, connected to the interface circuit board and sensor circuit board via connectors. This application has the beneficial effect of reducing the impact on project progress.

Description

Technical Field

[0001] This application relates to the technical field of gas alarms, and in particular to a gas alarm that is easy to wire. Background Technology

[0002] Currently, many gas alarms use a direct wiring design with a plastic-encased wiring outlet to achieve waterproofing and dustproofing in order to meet protection level requirements. However, this design usually means that the length of the output wiring harness, the interface type, and the wire diameter are fixed at the factory. This fixed configuration brings significant inconvenience in practical applications: 1. Length compatibility issue: The locations of controlled devices on site vary, and the positions of power sockets are also uncertain, making it difficult to accurately estimate the required wiring harness length. A harness that is too long will result in waste, while a harness that is too short will not meet the specifications and will require additional wiring.

[0003] 2. Interface compatibility issues: The controlled devices come from different manufacturers, and their interface standards may be inconsistent, which may cause the fixed wiring harness interface of the alarm to be unable to be directly connected.

[0004] 3. Wire diameter and power issues: The power of the controlled equipment is unknown. A wire harness with a fixed wire diameter may be too thin to bear the load, or too thick to cause unnecessary costs and installation difficulties.

[0005] Due to the diversity and unpredictability of these on-site requirements, existing alarm designs cannot fully cover all situations, while on-site installation must adhere to wiring specifications. When such mismatches occur, the common solution is to return the product to the manufacturer for re-customization, which not only consumes a significant amount of time and effort but also severely delays the project schedule. Utility Model Content

[0006] To minimize the impact on project progress while ensuring the protective capability of the gas alarm, this application provides a gas alarm with convenient wiring, employing the following technical solution: A gas alarm that is easy to wire includes: The base is installed on the wall. A cavity is opened inside the base, and a circular inlet / outlet interface is opened on the lower side wall for installing a waterproof locking head. An interface circuit board is installed on one side of the cavity. The interface circuit board is equipped with wiring terminals and connectors. A detection cavity is integrally formed on the other side of the cavity. The detection cavity is used to install sensors. The bottom and lower sidewall of the detection cavity are provided with air inlet louvers that communicate with the outside. A sensor circuit board is sealed and mounted on the detection cavity, and a connector is installed on the sensor circuit board, which is connected to the sensor. The top cover is sealed to the base. The main control circuit board is installed inside the upper cover, and a connector is installed on the main control circuit board. The main control circuit board is connected to the interface circuit board and the sensor circuit board through the connector.

[0007] By adopting the above technical solution, the gas alarm of this application adopts a modular design, connecting each circuit board through connectors, and has a high overall protection. In practical applications, users can flexibly choose the appropriate length of connecting wire according to the site requirements, avoiding the waste of excessively long wires or the need for additional wiring due to the fixed length of the wire harness at the factory, eliminating the need to return the product to the manufacturer for re-customization, greatly improving the flexibility and adaptability of wiring, and reducing the impact on project progress; it also allows users to choose the appropriate wire diameter connecting wire according to the power of the controlled equipment, avoiding problems caused by unsuitable wire diameter, ensuring the normal operation of the equipment, reducing costs and installation difficulty, and effectively ensuring project progress. In addition, users can choose the appropriate plug with wires or flexibly connect the wires through the terminal blocks on the interface circuit board according to the interface type of the controlled equipment, thereby solving the problem of interface incompatibility, better adapting to the connection requirements of different field equipment, and ensuring the smooth progress of the project. The main control circuit board is located on the top cover and is connected to the interface circuit board and sensor board through connectors. When removing the top cover, there are no other wire harnesses binding the upper and lower circuit boards, making disassembly and assembly convenient.

[0008] Optionally, vertical ribs are installed on the inner wall of the cavity, with the ribs located on both sides of the inlet and outlet interfaces. Since the wires connected to the field equipment pass through the waterproof locking head into the cavity and connect to the terminals on the interface circuit board, the protective capability of the gas alarm is improved.

[0009] By adopting the above technical solution, since the waterproof locking head installed in the inlet and outlet interface is generally hexagonal in shape, in order to prevent the waterproof locking head from rotating during tightening, vertical ribs are set to limit the waterproof locking head.

[0010] Optionally, the inner wall of the air intake louver is fitted with a waterproof and breathable membrane.

[0011] By adopting the above technical solution, water and dust can be prevented from entering without affecting the entry of the detected gas, thereby improving the protection level of the gas alarm to meet the needs of different locations.

[0012] Optionally, the base has a support protrusion fixedly connected to its bottom wall in the circumferential direction, and a guide plate is installed on the bottom wall of the base. The guide plate is located above the air intake louver, and the length of the guide plate is not less than the width of the air intake louver.

[0013] By adopting the above technical solution, a gap is left between the base and the wall, which facilitates the diffusion of gas into the detection chamber from the air intake louver on the back, and prevents water from accumulating on the wall from flowing into the air intake louver, further avoiding the possibility of water entering the detection chamber in actual application.

[0014] Optionally, the base is fixedly connected with a sealing ring along the circumference, and the upper cover is provided with a sealing groove along the circumference, and the sealing ring can be snapped into the sealing groove; the base and the upper cover are connected by screws, and the screw connection holes on the upper cover and the base are respectively opened on the outside of the sealing groove and the sealing ring.

[0015] By adopting the above technical solution, the screws used for fixing are located on the top cover, which facilitates opening the cover for maintenance on the engineering site without disassembling the wires connected inside the base, and improves the protection capability of the gas alarm.

[0016] Optionally, the upper cover has a circular antenna mounting hole on its side wall, which is used to install a wireless communication antenna.

[0017] By adopting the above technical solutions, external antennas can achieve good communication results.

[0018] Optionally, a rectangular hole is provided on the end face of the upper cover for mounting the display screen.

[0019] Optionally, the upper cover end face is also provided with an indicator hole and a key hole, the indicator hole being used to install an indicator light to indicate the status of the gas alarm; the key hole being used to install a button.

[0020] Optionally, the upper cover end face is also provided with a set of sound holes, and a circular fixing groove is provided inside the upper cover, the fixing groove being used for sealing and installing the speaker.

[0021] Optionally, a waterproof and breathable membrane is affixed to the sound hole, and a PVC film is affixed to the end face of the top cover.

[0022] By adopting the above technical solution, waterproofing and dustproofing effects can be achieved in all pores of the top cover.

[0023] In summary, this application includes at least one of the following beneficial technical effects: 1. The technical solution of this application ensures a high protection level for the gas alarm, protecting it from the effects of dust and water accumulation; 2. It uses terminal blocks for external connection, which facilitates on-site wiring construction according to specific conditions, and the output wires are fixed with waterproof locking heads, which improves the protection capability of the alarm. 3. The assembly and disassembly of the base and top cover are convenient, and the top cover is easy to remove for on-site maintenance. When removing the top cover, it will not affect the wiring connected to the base on-site. The circuit boards of the base and top cover use a connector connection method, which will not cause entanglement during disassembly and avoid problems. 4. The sensor circuit board is installed independently, which facilitates maintenance and replacement. It is convenient to install multiple traditional sensors in the detection chamber, and it can also install irregularly shaped sensors to be suitable for the detection of various gases.

[0024] 5. The spacious interior allows for the design of various output control schemes, facilitating direct switching of control functions based on the controlled equipment on site, eliminating the need for repeated product purchases and selections. Attached Figure Description

[0025] Figure 1 This is an exploded view of the top cover and base of this application; Figure 2 This is a structural schematic diagram of the top cover including the main control circuit board from one perspective; Figure 3 This is a structural schematic diagram of the top cover from another perspective; Figure 4 yes Figure 2 A schematic diagram of the structure behind the hidden main control circuit board; Figure 5 This is a structural diagram of the base including the interface circuit board, but excluding the sensor circuit board. Figure 6 This is a schematic diagram of the base display sensor circuit board; Figure 7 This is a schematic diagram of the rear of the overall structure of this application.

[0026] Explanation of reference numerals in the attached drawings: 100, base; 110, cavity; 120, terminal block; 130, inlet / outlet interface; 140, sealing ring; 150, vertical rib; 160, positioning groove; 170, guide plate; 180, support protrusion; 200, detection chamber; 220, groove; 230, air inlet louver; 300, interface circuit board; 400, sensor circuit board; 500, top cover; 510, sealing groove; 520, positioning post; 530, antenna mounting hole; 540, rectangular hole; 550, indicator hole; 560, key hole; 570, sound hole; 580, fixing groove; 600, main control circuit board; 700, connector. Detailed Implementation

[0027] To make the purpose, technical solution, and advantages of this application clearer, the following description is provided in conjunction with the appendix. Figure 1-7 The present application will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the application.

[0028] This application discloses a gas alarm that is easy to wire. (See reference...) Figure 1 and Figure 2 The gas alarm includes a base 100, a detection chamber 200, an interface circuit board 300, a sensor circuit board 400, a top cover 500, and a main control circuit board 600.

[0029] The base 100 has integrally formed mounting ears at both ends, with bolt holes on the mounting ears. The base 100 is mounted to the wall using bolts. A cavity 110 is formed inside the base 100. An interface circuit board 300 is mounted on one side of the cavity 110. Terminal blocks 120 and connectors 700 are mounted on the interface circuit board 300, with the terminal blocks 120 located at both ends. Circular inlet / outlet cable interfaces 130 are formed at both ends of the lower side wall of the base 100 for mounting waterproof locking heads to achieve waterproofing of the incoming and outgoing cable harnesses.

[0030] The detection chamber 200 is integrally formed on the other side of the cavity 110 and is located between the two inlet / outlet interfaces 130 for mounting the sensor. The sensor circuit board 400 is sealed and mounted on the detection chamber 200, and the sensor circuit board 400 is also equipped with a connector 700. The sensor circuit board 400 is connected to the sensor, and the connection method can be soldering or connection through the connector.

[0031] The upper cover 500 is sealed to the base 100. The main control circuit board 600 is installed inside the upper cover 500, and the main control circuit board 600 is also equipped with connectors 700. The main control circuit board 600 is connected to the interface circuit board 300 and the sensor circuit board 400 through the connectors 700. The connector connection method facilitates quick disassembly and assembly, avoiding the use of wire harnesses, which would restrict the connections and affect construction and maintenance.

[0032] It should be noted that the lower sidewall in this application refers to the sidewall facing the ground after the base 100 is installed on the wall.

[0033] Furthermore, in order to achieve a sealed connection between the upper cover 500 and the base 100 and further improve the protection capability, a sealing groove 510 is provided in the upper cover 500 along the circumference, and a sealing ring 140 is fixedly connected in the base 100 along the circumference. The sealing ring 140 can be snapped into the sealing groove 510 to achieve a seal between the upper cover 500 and the base 100.

[0034] The base 100 and the top cover 500 are connected by screws. The screw connection holes on the top cover 500 and the base 100 are respectively opened on the outside of the sealing groove 510 and the sealing ring 140 to prevent water from entering the gas alarm through the screw connection holes.

[0035] In addition, a positioning post 520 is fixedly connected to the top cover 500, and a positioning groove 160 is provided on the base 100. The positioning post 520 can be inserted into the positioning groove 160 to achieve positioning when the base 100 and the top cover 500 are installed, so as to facilitate the assembly of the base 100 and the top cover 500, ensure accurate correspondence of the connectors, and prevent misalignment.

[0036] Reference Figure 3 and Figure 4 Furthermore, a circular antenna mounting hole 530 is provided on the side wall of the top cover 500, which is used to install a wireless communication antenna.

[0037] Furthermore, a rectangular hole 540, an indicator hole 550, and a key hole 560 are provided on the end face of the upper cover 500. The rectangular hole 540 is used to install a display screen; multiple indicator holes 550 are provided to install indicator lights to indicate different states of the gas alarm; and multiple key holes 560 are provided to install buttons with different functions.

[0038] Furthermore, a set of sound holes 570 are provided on the end face of the upper cover 500, and a circular fixing groove 580 is provided inside the upper cover 500. The fixing groove 580 is used to seal and install the speaker.

[0039] In addition, to achieve waterproofing and dustproofing of all pores in the top cover 500, a waterproof and breathable membrane is attached to the sound hole 570, and a PVC membrane is attached to the end face of the top cover 500. It should be noted that neither the waterproof and breathable membrane nor the PVC membrane is shown in the diagram.

[0040] Reference Figure 5 and Figure 6 Two sets of vertical ribs 150 are installed on the inner wall of the cavity 110. Each set of vertical ribs 150 includes two vertical ribs 150 and corresponds to an inlet / outlet interface 130. The two vertical ribs 150 in the same set are respectively located on both sides of the corresponding inlet / outlet interface 130 to limit the waterproof locking head and prevent the waterproof locking head from rotating when tightening.

[0041] Furthermore, to achieve a sealed connection between the sensor circuit board 400 and the detection cavity 200, a groove 220 is provided circumferentially in the detection cavity 200 for installing an adhesive strip, thereby sealing the sensor circuit board 400 and the detection cavity 200 and preventing gas entering the detection cavity 200 from leaking into the cavity 110. The sensor circuit board 400 is mounted on the detection cavity 200 with screws, and the screw holes are located on the outside of the groove 220.

[0042] The bottom and lower side wall of the detection chamber 200 are equipped with air inlet louvers 230 that communicate with the outside. The inner wall of the air inlet louvers 230 is equipped with a waterproof and breathable membrane, and adopts a back-and-forth blocking design to prevent hard foreign objects from intruding and thus puncturing the internal waterproof and breathable membrane.

[0043] Reference Figure 7 A support protrusion 180 is fixedly connected circumferentially to the bottom wall of the base 100, and a guide plate 170 is also fixedly connected to the bottom wall of the base 100. The guide plate 170 is positioned above the air intake louver 230, and the length of the guide plate 170 is not less than the width of the air intake louver 230. The support protrusion 180 allows the back of the base 100 to not be flush against the wall, facilitating the diffusion of gas from the air intake louver 230 into the sensor. The guide plate 170 prevents water from flowing along the wall from reaching the air intake louver 230, further preventing the possibility of water intrusion into the sensor in practical applications.

[0044] It should be noted that the circuit designs involved in the gas alarm are all mature designs. This structure can accommodate the corresponding circuits, and different functional circuit boards are allocated according to the structure to realize the function of the gas alarm. Therefore, the circuits will not be described in detail.

[0045] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Any feature disclosed in this specification (including the abstract and drawings) may be replaced by other equivalent or similar features unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is only one example of a series of equivalent or similar features.

Claims

1. A gas alarm that is easy to wire, characterized in that, include: The base (100) is installed on the wall. A cavity (110) is provided inside the base (100), and a circular inlet / outlet interface (130) is provided on the lower side wall for installing a waterproof locking head. An interface circuit board (300) is installed on one side of the cavity (110). The interface circuit board (300) is equipped with wiring terminals (120) and connectors (700). A detection cavity (200) is integrally formed on the other side of the cavity (110). The detection cavity (200) is used to install sensors. The bottom and lower sidewall of the detection cavity (200) are provided with air inlet louvers (230) that communicate with the outside. A sensor circuit board (400) is sealed and mounted on the detection cavity (200), and a connector (700) is mounted on the sensor circuit board (400). The sensor circuit board (400) is connected to the sensor. The top cover (500) is sealed to the base (100); The main control circuit board (600) is installed inside the upper cover (500), and a connector (700) is installed on the main control circuit board (600). The main control circuit board (600) is connected to the interface circuit board (300) and the sensor circuit board (400) through the connector (700).

2. A gas alarm device with convenient wiring according to claim 1, characterized in that, The cavity (110) is equipped with vertical ribs (150) on its inner wall, and the vertical ribs (150) are located on both sides of the inlet and outlet interfaces (130).

3. A gas alarm device with convenient wiring according to claim 1, characterized in that, The inner wall of the air intake louver (230) is fitted with a waterproof and breathable membrane.

4. A gas alarm device with convenient wiring according to claim 1, characterized in that, The base (100) has a support protrusion (180) fixedly connected to the bottom wall along the circumference. The base (100) has a guide plate (170) installed on the bottom wall. The guide plate (170) is located above the air intake louver (230), and the length of the guide plate (170) is not less than the width of the air intake louver (230).

5. A gas alarm device with convenient wiring according to claim 1, characterized in that, The base (100) is fixedly connected with a sealing ring (140) in the circumferential direction, and the upper cover (500) is provided with a sealing groove (510) in the circumferential direction. The sealing ring (140) can be snapped into the sealing groove (510). The base (100) and the upper cover (500) are connected by screws. The screw connection holes on the upper cover (500) and the base (100) are respectively opened on the outside of the sealing groove (510) and the sealing ring (140).

6. A gas alarm device with convenient wiring according to claim 1, characterized in that, The upper cover (500) has a circular antenna mounting hole (530) on its side wall, which is used to install a wireless communication antenna.

7. A gas alarm device with convenient wiring according to claim 6, characterized in that, The top cover (500) has a rectangular hole (540) on its end face, which is used to install the display screen.

8. A gas alarm device with convenient wiring according to claim 7, characterized in that, The end face of the top cover (500) is also provided with an indicator hole (550) and a key hole (560). The indicator hole (550) is used to install an indicator light to indicate the status of the gas alarm; the key hole (560) is used to install a button.

9. A gas alarm device with convenient wiring according to claim 8, characterized in that, The end face of the upper cover (500) is also provided with a set of sound holes (570), and a circular fixing groove (580) is provided inside the upper cover (500), the fixing groove (580) is used for sealing and installing the speaker.

10. A gas alarm device with convenient wiring according to claim 9, characterized in that, A waterproof and breathable membrane is affixed to the sound hole (570), and a PVC film is affixed to the end face of the top cover (500).

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