Fire detector

Abstract

The utility model belongs to the technical field of fire fighting, and discloses a fire detector, which comprises a shell, a circuit assembly and a lens assembly. The shell is provided with the first section, the second section and the third section which are detachably connected in sequence, a space for containing the circuit assembly and the lens assembly is formed, the circuit assembly and the lens assembly are protected, dust is prevented from polluting the circuit assembly and the lens assembly, the first section and the third section can be mounted and dismounted separately or simultaneously, and mounting and dismounting convenience is improved. The circuit assembly is an integral body and has a protection function, and by adopting the circuit assembly, the internal structure is simple, the space is saved, and redundant wires are avoided. The circuit assembly is arranged in the second section, and when the circuit assembly is repaired, only the third section needs to be disassembled, so that the fire detector is favorably maintained, and the maintenance efficiency is improved. The lens assembly is arranged in the first section, the lens assembly is not affected when the circuit assembly is maintained, and the lens assembly is prevented from being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of fire protection, in particular to a fire detector. Background Art

[0002] Fire detectors are an indispensable component of automatic fire alarm systems. They monitor physical quantities such as temperature, smoke, gas and radiation light intensity in the environment. Once characteristic physical quantities of fire are detected, they will immediately convert them into electrical signals and send alarm signals, thereby achieving early warning of fire and preventing losses.

[0003] Existing fire detectors collect detection data by setting up multiple circuit boards, and then process the collected signals and alarm, so that personnel can identify the occurrence of fire.

[0004] However, the internal circuit board structure of existing fire detectors is complex, and the circuit boards need to be assembled, which reduces production efficiency. The connection between multiple circuit boards through wires adds unnecessary wires and occupies space inside the fire detector. It is difficult to disassemble and assemble the internal circuit boards for repair and replacement, which is not conducive to the later maintenance of the fire detector and reduces maintenance efficiency. Utility Model Content

[0005] The purpose of the utility model is to provide a fire detector that can be easily installed and disassembled during later maintenance.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] A fire detector is provided, comprising:

[0008] A housing having a first section, a second section, and a third section that are detachably connected in sequence;

[0009] a circuit component, the circuit component being disposed within the second section;

[0010] A lens assembly is provided inside the first section, and the circuit assembly is electrically connected to the lens assembly.

[0011] As a preferred solution of the above-mentioned fire detector, the fire detector further includes a first supporting stud, the first supporting stud is installed on the second section, and the circuit assembly is installed on an end of the first supporting stud close to the third section.

[0012] As a preferred embodiment of the fire detector, the circuit assembly includes:

[0013] a circuit board, the circuit board being fixed to the second section;

[0014] The circuit module is arranged on the side of the circuit board facing the first section, and the circuit board and the circuit module are electrically connected. The lens assembly is installed on the side of the circuit module facing away from the circuit board, and the lens assembly is electrically connected to the circuit module.

[0015] As a preferred embodiment of the above-mentioned fire detector, the fire detector further includes a second supporting stud, which is mounted on the circuit board and extends toward the side of the first section, and the circuit module is mounted on the side of the second supporting stud toward the first section.

[0016] As a preferred solution of the above-mentioned fire detector, the shell is closed, and a mounting plate is provided on the side of the second section close to the first section to separate the interior of the shell into a first mounting cavity and a second mounting cavity, the circuit assembly is located in the first mounting cavity, and the lens assembly is located in the second mounting cavity.

[0017] As a preferred solution of the above fire detector, the housing is provided with a connection portion for fixing to an external object.

[0018] As a preferred solution of the above fire detector, an explosion-proof plug is provided on the housing.

[0019] As a preferred solution of the above-mentioned fire detector, the fire detector further comprises a panel, which is arranged inside the first section and is provided with an indicator light for alarm display.

[0020] As a preferred solution of the above-mentioned fire detector, the panel is provided with a heat dissipation gap.

[0021] As a preferred solution of the above fire detector, the fire detector further includes a tail wire, one end of the tail wire is connected to the circuit assembly, and the other end of the tail wire is used to connect to an external device.

[0022] Beneficial effects of the utility model:

[0023] The fire detector of the present invention includes a housing, a circuit assembly, and a lens assembly. The housing has a first section, a second section, and a third section that are detachably connected in sequence, forming a space for accommodating the circuit assembly and the lens assembly, protecting the circuit assembly and the lens assembly from dust contamination, and the first section and the third section can be installed and removed separately or simultaneously, which improves the convenience of installation and removal. The circuit assembly is a whole and has a protective function. The use of this circuit assembly can simplify the internal structure, save space, and avoid unnecessary wires. The circuit assembly is arranged inside the second section. When repairing the circuit assembly, only the third section needs to be removed, which is conducive to the maintenance of the fire detector and improves maintenance efficiency. The lens assembly is arranged inside the first section. When maintaining the circuit assembly, it will not affect the lens assembly, preventing damage to the lens assembly. The lens assembly is installed separately, which can be easily replaced to achieve a better detection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is an exploded view of the structure of the fire detector provided by the embodiment of the utility model;

[0025] Figure 2 This is a schematic structural diagram of a fire detector provided by an embodiment of the present utility model;

[0026] Figure 3 This is an axonometric diagram of a fire detector provided by an embodiment of the present utility model;

[0027] Figure 4 This is a schematic diagram of the panel structure provided by an embodiment of the present utility model;

[0028] Figure 5 This is an axonometric view of a panel provided by an embodiment of the present utility model;

[0029] Figure 6 It is a partial cross-sectional view of the fire detector provided by the embodiment of the utility model.

[0030] In the picture:

[0031] 1. Housing; 11. First section; 111. Window; 12. Second section; 121. Grounding hole; 122. Waterproof connector; 123. Plug; 124. Mounting threaded hole; 125. First mounting hole; 126. Lens opening; 127. Mounting plate; 13. Third section; 2. Circuit assembly; 21. Circuit board; 22. Circuit module; 3. Lens assembly; 4. First support stud; 5. Second support stud; 6. Panel; 61. Third mounting hole; 62. Indicator hole; 63. Lens hole; 64. Positioning hole; 65. Heat dissipation gap; 66. Silk screen; 7. Tail wire. DETAILED DESCRIPTION

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0033] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0034] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0035] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0036] like Figure 1 As shown, this embodiment provides a fire detector comprising a housing 1, a circuit assembly 2, and a lens assembly 3. The housing 1 comprises a first section 11, a second section 12, and a third section 13, which are detachably connected in sequence, forming a space for accommodating the circuit assembly 2 and the lens assembly 3, protecting the circuit assembly 2 and the lens assembly 3 from dust contamination. The first section 11 and the third section 13 can be installed and removed separately or simultaneously, improving the convenience of installation and removal.

[0037] Specifically, the housing 1 is in the shape of an elongated strip and has a first section 11, a second section 12, and a third section 13 along its length, which can be installed and removed separately or simultaneously. The circuit assembly 2 is arranged inside the second section 12. The circuit assembly 2 is a whole and has a protective function. The use of this circuit assembly 2 can simplify the internal structure, save space, and avoid unnecessary wires. When repairing the circuit assembly 2, only the third section 13 needs to be removed, which is conducive to the maintenance of the fire detector and improves maintenance efficiency. The lens assembly 3 is arranged inside the first section 11. The circuit assembly 2 is electrically connected to the lens assembly 3. When maintaining the circuit assembly 2, it will not affect the lens assembly 3, preventing damage to the lens assembly 3. The lens assembly 3 is installed separately, which can be easily replaced to achieve a better detection effect.

[0038] Optionally, the housing 1 is enclosed, and a mounting plate 127 is provided on a side of the second section 12 proximate to the first section 11 to separate the interior of the housing 1 into a first mounting cavity and a second mounting cavity. The circuit assembly 2 is located in the first mounting cavity, and the lens assembly 3 is located in the second mounting cavity. The mounting plate 127 separates the circuit assembly 2 from the lens assembly 3. When installing or removing one of the circuit assembly 2 and the lens assembly 3, the mounting plate 127 protects the other from external damage and dust intrusion. At the same time, the mounting plate 127 is provided on a side proximate to the first section 11 to ensure that the circuit assembly 2 is entirely located within the central cavity, facilitating installation of the circuit assembly 2.

[0039] Specifically, the housing 1 is cylindrical and is assembled sequentially from a first section 11, a second section 12, and a third section 13. One side of the mounting plate 127 forms a first mounting cavity with the third section 13, while the other side of the mounting plate 127 forms a second mounting cavity with the first section 11. In this embodiment, the mounting plate 127 is located on the side of the second section 12 closest to the first section 11. This means that the first mounting cavity is formed by the second section 12 and the third section 13, while the first section 11 forms the second mounting cavity.

[0040] The mounting plate 127 can be fixed to the side of the second section 12 close to the first section 11 by bonding or snapping, or it can be designed as an integral structure with the second section 12, which is not limited in this embodiment. Taking snapping as an example, by providing a hook on the edge spacer ring of the mounting plate 127 in the circumferential direction, a slot is provided at the position corresponding to the hook in the second section 12, and the hook is embedded into the slot through external pressure, so that the hook and the slot are snap-fitted and fixed, so that the mounting plate 127 is fixed to the second section 12. The number of hooks and slots can be set according to the size of the fire detector, which is not limited in this embodiment. The material of the shell 1 can be plastic, alloy or glass, etc., which is selected according to the specific usage scenario, which is not limited in this embodiment.

[0041] Alternatively, as Figure 1-Figure 3As shown, the fire detector also includes a first support stud 4, which is arranged in the second section 12, and the circuit assembly 2 is installed at one end of the first support stud 4 close to the third section 13, so that the circuit assembly 2 is away from the lens assembly 3, further avoiding mutual interference between the circuit assembly 2 and the lens assembly 3 during installation or disassembly.

[0042] In this embodiment, one end of the first support stud 4 is connected to the mounting plate 127 via a connector. A first mounting hole 125 is provided along the circumferential spacing ring of the mounting plate 127. One end of the connector is inserted into one axial end of the first support stud 4, and the other end is inserted into the first mounting hole 125 to lock and secure the first support stud 4. The first support stud 4 can be a cylinder. The connector can be a connector such as a screw or a pin, which is not limited in this embodiment. The number of connectors can be one, two, three, or more than three, which is not limited in this embodiment.

[0043] In other embodiments, the first support stud 4 can also be fixed to the mounting plate 127 by means of a snap connection. A snap connection groove is provided along the circumferential spacing ring of the mounting plate 127, and a hook is provided at one end of the first support stud 4 connected to the mounting plate 127. The hook is embedded in the snap connection groove by external pressure, so that the hook and the snap connection groove are snap-fitted and fixed, thereby achieving the fixation of the first support stud 4 to the mounting plate 127. The number of the snap connection grooves can be one, two, three, or more, and this embodiment is not limited thereto.

[0044] Optionally, the circuit assembly 2 includes a circuit board 21 and a circuit module 22. The circuit board 21 is arranged on the second section 12, and the circuit module 22 is arranged on the side of the circuit board 21 facing the first section 11, and the circuit board 21 and the circuit module 22 are electrically connected. Among them, the circuit module 22 is a signal processor, which can convert the detected fire signal into an electrical signal format. The circuit board 21 provides the necessary circuit connection and support for the circuit module 22 to ensure stable signal transmission. At the same time, the circuit board 21 can receive and transmit fire signals and can send control signals. The specific model of the signal processor can refer to the existing technology and will not be described in detail in this application. The lens assembly 3 is installed on the side of the circuit module 22 facing away from the circuit board 21, and the lens assembly 3 is electrically connected to the circuit module 22. This installation method can meet the requirements of signal transmission between the circuit board 21, the circuit module 22 and the lens assembly 3 while separating the circuit board 21, the circuit module 22 and the lens assembly 3, and keeping them as far away from the lens assembly 3 as possible.

[0045] Specifically, one side of the circuit board 21 is connected to the side of the first support stud 4 that extends toward the interior of the second section 12 via a connector. A mounting hole is provided on the circuit board 21. One end of the connector is inserted into one axial end of the first support stud 4, while the other end is inserted into the mounting hole on the circuit board 21, securing the circuit board 21. Wires are used to connect the circuit board 21 to the circuit module 22, and between the circuit module 22 and the lens assembly 3, for signal transmission.

[0046] Furthermore, the fire detector also includes a second support stud 5, which is installed on the circuit board 21 and extends toward the side of the first section 11. The circuit module 22 is installed on the side of the second support stud 5 toward the first section 11, so that the lens assembly 3 can be connected to the circuit module 22, making the internal circuit simpler and avoiding unnecessary wires. The circuit assembly 2 is kept away from the lens assembly 3 as a whole to prevent mutual interference during installation and disassembly.

[0047] Specifically, one end of the second support stud 5 is connected to the circuit board 21 through a connector. A second mounting hole is provided along the circumferential spacing ring of the circuit board 21, and one end of the connector is inserted into one end of the second support stud 5 along the axial direction, and the other end is inserted into the second mounting hole to lock and fix the second support stud 5. The first support stud 4 can be a cylinder. The connector can be a connector such as a screw or a pin, which is not limited in this embodiment. The number of connectors can be one, two, three or more, which is not limited in this embodiment. One end of the circuit module 22 can be connected to the side of the second support stud 5 facing the first section 11 by a connector or a snap-on connection. In this embodiment, a circuit module mounting hole is provided at a position of the circuit module 22 corresponding to the second support stud 5, and one end of the connector is inserted into the side of the second support stud 5 facing the first section 11, and the other end is inserted into the circuit module mounting hole to lock and fix the circuit module 22. A lens opening 126 is provided in the middle of the mounting plate 127. The end of the lens assembly 3 that is used to connect to the circuit assembly 2 is passed through the lens opening 126 and fixed to the side of the circuit assembly 2 facing the first section 11. The lens assembly 3 can be fixed by means of snap-fitting, threaded connection, or connectors, which are not limited in this embodiment. Taking snap-fitting as an example, a hook is provided on the side of the circuit module 22 facing the first section 11, and a slot is provided on the lens assembly 3. The hook is embedded in the slot through external pressure, so that the hook and the slot are snap-fitted and fixed, thereby achieving the fixation of the lens assembly 3. During installation, the first step is to install the first support stud 4 and the second support stud 5 on the circuit board 21; the second step is to install the circuit module 22 on the second support stud 5; the third step is to install the first support stud 4 on the circuit board 21 on the mounting plate 127; and the fourth step is to install the lens assembly 3 on the circuit module 22 through the lens opening 126.

[0048] Alternatively, as Figure 1 、 Figure 2 and Figure 4 As shown, the fire detector also includes a panel 6, which is arranged inside the first section 11. An indicator light for alarm display is provided on the panel 6. When the fire detector detects a fire, the indicator light will emit light to determine whether a fire has occurred.

[0049] Specifically, the panel 6 is mounted on the mounting plate 127 through a connector and extends toward the inside of the first section 11. Positioning holes 64 are set at the circumferential edge interval ring of the panel 6, and panel mounting holes corresponding to the positioning holes 64 are provided on the mounting plate 127. The connector passes through the positioning holes 64 and into the panel mounting holes to lock and fix the panel 6. The surface of the panel 6 can be made of a material such as resin or plastic, which is not limited in this embodiment. The indicator light is fixed to the panel 6 by screws or bolts. Taking screws as an example, a third mounting hole 61 and an indicator light hole 62 are provided on the panel 6, and a through hole is provided on the indicator light at a position corresponding to the third mounting hole 61. The screw is passed through the through hole on the indicator light and into the third mounting hole 61 to lock and fix the indicator light. The light emitted by the indicator light can pass through the indicator light hole 62 for observation by the user.

[0050] Furthermore, multiple indicator light holes 62 are provided on the panel 6. Each indicator light hole 62 is provided with an indicator light of a different color to indicate the different operating states of the fire detector. In this embodiment, three indicator light holes 62 are provided. The first indicator light hole 62 is provided with a red indicator light for alarm indication. When a fire is detected, the red indicator light emits light. The second indicator light hole 62 is provided with a yellow indicator light for fault indication. When a fire detector malfunctions, the yellow indicator light emits light. The third indicator light hole 62 is provided with a green indicator light for operation indication. The green indicator light emits light when the fire detector is in normal operation.

[0051] Alternatively, as Figure 3 As shown, a lens hole 63 is provided in the middle of the panel 6. The portion of the lens assembly 3 used for recording images is flush with the end surface of the panel 6, preventing the panel 6 from blocking the detection portion. The panel 6 also protects the lens assembly 3. The surface of the panel 6 facing the first section 11 is a silk screen surface 66, which can be printed with numbers and patterns.

[0052] Further, if Figure 2 and Figure 5 As shown, the panel 6 is provided with a heat dissipation gap 65 to prevent the internal temperature of the fire detector from being too high. In this embodiment, an opening is provided on one side of the circumference of the panel 6. The size of the opening can be set according to the actual heating situation of the fire detector, and this embodiment does not limit this.

[0053] Alternatively, as Figure 1 and Figure 3As shown, the first section 11 and the second section 12, as well as the second section 12 and the third section 13, are threadedly connected. The threaded connection facilitates installation and removal of the housing 1, and provides good sealing at the shell-shell connection. In this embodiment, the second section 12 is provided with external threads at the locations for connection with the first section 11 and the third section 13. The first section 11 and the third section 13 are both circumferentially provided with internal threads that mate with the external threads on the second section 12 on the side facing the second section 12, and on the side facing the second section 12, respectively. The first section 11, the second section 12, and the third section 13 are connected by threads.

[0054] Furthermore, seals are provided at the joints between the first and second segments 11, 12, and between the second and third segments 12, 13, to seal the gaps. This further enhances the sealing properties of the housing connection, providing enhanced water and dust resistance. In this embodiment, the seals are annular structures that fit over both axial ends of the second segment 12. The seals are secured by threaded connections between the first and third segments 11, 13, and the second segment 12. The seals can be made of flexible materials such as rubber or resin, which are not limited in this embodiment.

[0055] Optionally, a window 111 is provided on the side of the first section 11 away from the second section 12, and the lens assembly 3 can better detect the external environment through the window 111. In this embodiment, the window 111 is a cylinder, and its outer diameter is equal to the inner diameter of the first section 11. The window 111 is embedded in the first section 11 so that the end face of the window 111 is flush with the first section 11. A groove is provided at one end of the window 111, which is connected to the first section 11 and can accommodate the lens assembly 3. The window 111 and the first section 11 can be fixed by bonding, snapping or threading, which is not limited in this embodiment. The window 111 can be made of transparent materials such as transparent plastic or glass, which is not limited in this embodiment.

[0056] Optionally, grooves are provided along the circumferential spacing between the exterior of the first section 11 away from the second section 12 and the exterior of the third section 13 away from the second section 12. During installation and removal, the grooves increase friction between the housing 1 and a hand or fixture, preventing the hand or fixture from slipping on the housing 1 when applying force. This reduces effort during installation and removal of the housing 1 and improves assembly efficiency. The size and number of the grooves may be increased or decreased depending on the size of the fire detector and are not limited in this embodiment.

[0057] Alternatively, as Figure 1 and Figure 6 As shown, a grounding hole 121 is provided on the second section 12 for grounding to protect personal safety and prevent equipment damage. In this embodiment, the grounding hole 121 is provided on the outer wall of the second section 12 and is electrically connected to the grounding wire.

[0058] Alternatively, as Figure 1 and Figure 2As shown, the fire detector also includes a tail wire 7. One end of the tail wire 7 is electrically connected to the circuit assembly 2, and the other end of the tail wire 7 is connected to an external device. The fire detector can be connected to a fire protection system via the tail wire 7. When a fire is detected, the fire protection system can be activated promptly to better prevent the fire. In this embodiment, the tail wire 7 is connected to the side of the circuit board 21 facing the third section 13.

[0059] Further, if Figure 1 、 Figure 2 and Figure 6 As shown, a waterproof connector 122 is provided on the outer wall of the second section 12. The tail cable 7 passes through the waterproof connector 122 to connect to external equipment, improving the fire detector's waterproof performance and extending its service life. In this embodiment, a through hole is provided in the second section 12, and the waterproof connector 122 is installed in the through hole. The waterproof connector 122 and the second section 12 can be connected by adhesive or threading, which is not limited in this embodiment.

[0060] Optionally, a plug 123 is provided on the outer wall of the second section 12 to prevent accidents such as explosions or combustion within the fire detector, thereby improving the safety of the fire detector. In this embodiment, a through hole is provided in the second section 12, and the plug 123 is installed in the through hole. The plug 123 and the second section 12 can be connected by threads or snap-fit, which is not limited in this embodiment. The plug 123 can be made of materials such as rubber, plastic, or metal, and different materials can be used depending on the specific usage environment, which is not limited in this embodiment.

[0061] Alternatively, as Figure 1 and Figure 3 As shown, a connection portion is provided on the outer wall of the second section 12 to fix the fire detector to an external object. In this embodiment, the connection portion is a mounting threaded hole 124, and a screw is inserted into the external device and the mounting threaded hole 124 to fix the fire detector.

[0062] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A fire detector, characterized in that: include: A housing (1), wherein the housing (1) comprises a first section (11), a second section (12), and a third section (13) which are detachably connected in sequence; a circuit component (2), the circuit component (2) being disposed inside the second section (12); A lens assembly (3), wherein the lens assembly (3) is arranged inside the first section (11), and the circuit assembly (2) is electrically connected to the lens assembly (3).

2. The fire detector according to claim 1, characterized in that The fire detector further comprises a first supporting stud (4), wherein the first supporting stud (4) is mounted on the second section (12), and the circuit assembly (2) is mounted on an end of the first supporting stud (4) close to the third section (13).

3. The fire detector according to claim 1, characterized in that The circuit assembly (2) comprises: a circuit board (21), the circuit board (21) being fixed to the second section (12); A circuit module (22) is provided on a side of the circuit board (21) facing the first section (11), the circuit board (21) and the circuit module (22) are electrically connected, and the lens assembly (3) is installed on a side of the circuit module (22) facing away from the circuit board (21), and the lens assembly (3) is electrically connected to the circuit module (22).

4. The fire detector according to claim 3, characterized in that The fire detector further comprises a second supporting stud (5), the second supporting stud (5) being mounted on the circuit board (21) and extending toward a side facing the first section (11), and the circuit module (22) being mounted on a side of the second supporting stud (5) facing the first section (11).

5. The fire detector according to claim 1, characterized in that The housing (1) is in a closed shape, and a mounting plate (127) is provided on a side of the second section (12) close to the first section (11) to separate the interior of the housing (1) into a first mounting cavity and a second mounting cavity, the circuit assembly (2) being located in the first mounting cavity, and the lens assembly (3) being located in the second mounting cavity.

6. The fire detector according to claim 1, characterized in that The housing (1) is provided with a connection portion for fixing to an external object.

7. The fire detector according to claim 1, characterized in that An explosion-proof plug (123) is provided on the housing (1).

8. The fire detector according to claim 1, characterized in that The fire detector further comprises a panel (6), the panel (6) being arranged inside the first section (11), and an indicator light for alarm display being arranged on the panel (6).

9. The fire detector according to claim 8, characterized in that The panel (6) is provided with a heat dissipation gap (65).

10. The fire detector according to claim 1, characterized in that The fire detector further comprises a tail line (7), one end of the tail line (7) is connected to the circuit assembly (2), and the other end of the tail line (7) is used for connecting to an external device.

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