Fire detector with heating waterproof base

Abstract

The fire detector comprises a mounting base, a heating assembly, a detection assembly, a labyrinth assembly and a bottom shell, a plurality of smoke inlets are formed in the bottom shell, the labyrinth assembly is mounted on the bottom shell and is opposite to the smoke inlets, a labyrinth structure is formed in the labyrinth assembly, and the heating assembly is mounted on the bottom shell. The bottom shell is installed on the lower side of the installation base, the detection assembly is installed in the installation base and located above the labyrinth assembly, and the heating assemblies are installed in the installation base and arranged above the detection assembly at intervals; the heating assembly is configured to enable the internal temperature of the fire detector to be higher than the external environment temperature through heat conduction after heating. The internal temperature of the detector is higher than the external environment temperature through heating of the heating assembly, so that moisture and mist existing in the labyrinth structure are removed, the smoke detection accuracy is improved, and stable work of the fire detector is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of detectors, and particularly to a fire detector with a heating waterproof base. BACKGROUND

[0002] A fire detector is a device that detects a fire in a fire alarm system. The core component of a fire detector is a photosensitive element, which is sensitive to the small changes in the external environment according to the principles of optics and physics. However, this mechanism sometimes incorrectly identifies other substances (such as dust, water mist) that have some similar characteristics to fire smoke as fire signals. In addition, the photosensitive element is directly exposed to the outside world for a long time and is easily eroded by dust, moisture and other factors in the air, thereby gradually reducing its sensitivity.

[0003] When a fire detector is used in coastal areas, the climate conditions there are relatively humid, and the humidity level often exceeds the normal range, especially during the plum rain season in summer and the "back to the south" (a special climate phenomenon in southern cities) in winter, the humidity often rises to more than 95%. During the day, the air is not easy to reach saturation state due to the high temperature, and water droplets are difficult to form. But at night, as the temperature drops, the water vapor in the air is easy to reach saturation, and then condense into water droplets. When these moisture enters the detection chamber of the fire detector and condenses into water droplets, it will scatter a large amount of light, thereby triggering false alarms of the detector. At the same time, moisture is also easy to adsorb dust, which may cause leakage current on the circuit board of the detector, thereby corroding the circuit board. In more humid weather conditions such as rainy days, this situation will become more serious. CONTENT

[0004] The purpose of the present application is to provide a fire detector with a heating waterproof base, which heats the inside of the detector to be higher than the outside temperature by a heating assembly, thereby removing the moisture and mist in the labyrinth structure, improving the smoke detection accuracy of the detection assembly, and ensuring that the fire detector can always work stably and efficiently.

[0005] To achieve the above purpose, the present application adopts the following technical solutions:

[0006] On the one hand, a fire detector with a heating waterproof base is provided, which comprises a mounting seat, a heating assembly, a detection assembly, a labyrinth assembly and a bottom shell. A plurality of smoke inlets are formed on the bottom shell. The labyrinth assembly is installed on the bottom shell and opposite to the position of the smoke inlets. A labyrinth structure is formed inside the labyrinth assembly. The bottom shell is installed on the lower side of the mounting seat. The detection assembly is installed inside the mounting seat and above the labyrinth assembly. The heating assembly is installed in the mounting seat and is arranged above the detection assembly.

[0007] The heating assembly is configured to heat the fire detector with the waterproof heating base through heat conduction so that the internal temperature of the fire detector is greater than the external environment temperature.

[0008] Further, the heating assembly is further configured to obtain an external environment temperature T1, and the heating assembly is heated through heat conduction so that the temperature of the fire detector with the waterproof heating base is T2, wherein 2℃≤T2-T1≤5℃.

[0009] Further, the heating assembly comprises a heating circuit board mounted on the inner wall surface of the mounting seat, and a heating sheet electrically connected with the heating circuit board.

[0010] Further, the heating assembly further comprises a temperature control switch, which is integrated on the heating circuit board, and the temperature control switch is configured to automatically disconnect the power supply of the heating circuit board when the working temperature of the heating assembly is 40℃.

[0011] Further, the detection assembly comprises a detection circuit board, a photoelectric emission tube and a photoelectric receiving tube, both of which are electrically connected with the detection circuit board and are arranged in the labyrinth structure.

[0012] Further, an accommodation space is formed between the mounting seat and the bottom shell, and a base is arranged in the accommodation space, and a control circuit board is mounted on the base, and the control circuit board is electrically connected with the detection circuit board through a metal connecting piece.

[0013] Further, the control circuit board is further connected with an alarm.

[0014] Further, the entrance end of the labyrinth structure is provided with an insect screen.

[0015] Further, the bottom shell is in the shape of an inverted circular table, and the outer peripheral wall of the lower part is hollowed out to form a plurality of smoke inlets.

[0016] Further, the mounting seat is made of polyvinyl chloride plastic material; and / or the bottom shell is made of polyvinyl chloride plastic material.

[0017] Further, the heating assembly further comprises a temperature control switch, which is configured to automatically disconnect the power supply of the heating circuit board when the working temperature of the heating assembly is 40℃.

[0018] The beneficial effects of the present application are: a plurality of smoke inlets are designed on the bottom shell, allowing smoke in the external environment to enter the inside of the detector, the labyrinth assembly is installed on the bottom shell and opposite to the smoke inlet, the labyrinth structure formed inside can effectively filter out most of the dust and larger particles, while slowing down the flow speed of smoke or moisture, this design not only improves the accuracy of smoke detection, but also reduces false alarms caused by dust and moisture. The key is that the heating assembly is installed inside the mounting seat and above the detection assembly, through the arrangement of the spacing, the heating assembly can uniformly distribute heat and effectively transfer to the entire inside of the detector, especially around the labyrinth structure and the detection assembly. When the heating assembly starts, it will raise the temperature inside the detector through heat conduction, higher than the external environment, especially higher than the dew point temperature, thereby effectively preventing moisture from condensing into water droplets in the labyrinth structure or inside the detector, this mechanism not only reduces light scattering and dust interference, but also reduces the risk of circuit board corrosion caused by moisture, significantly improves the accuracy of smoke detection and the stability of the system. BRIEF DESCRIPTION OF DRAWINGS

[0019] The present application will be further described in detail below according to the drawings and examples.

[0020] Figure 1 The perspective view of the fire detector with a heating and waterproof base according to the embodiment of the present application;

[0021] Figure 2 The exploded view of the fire detector with a heating and waterproof base according to the embodiment of the present application;

[0022] Figure 3 The assembly view of the detection assembly, the labyrinth assembly and the insect screen according to the embodiment of the present application;

[0023] Figure 4 The perspective view of the detection assembly according to the embodiment of the present application;

[0024] Figure 5 The perspective view of the heating assembly according to the embodiment of the present application;

[0025] Figure 6 The front view of the bottom shell according to the embodiment of the present application.

[0026] In the figure: 1, mounting seat; 2, heating assembly; 201, heating circuit board; 202, heating sheet; 203, temperature control switch; 3, detection assembly; 301, detection circuit board; 302, photoelectric emitter tube; 303, photoelectric receiver tube; 4, labyrinth assembly; 5, bottom shell; 501, smoke inlet; 6, control circuit board; 7, metal connecting piece; 8, insect screen. DETAILED DESCRIPTION

[0027] In order to make the technical problems solved by the present application, the technical solutions adopted and the technical effects reached more clear, the technical solutions of the embodiments of the present application are further described in detail below. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0028] In the description of the present application, unless explicitly defined and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] In the present application, unless explicitly defined and limited, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0030] As shown in Figures 1-6 The present embodiment provides a fire detector with a warming waterproof base, comprising: a mounting seat 1, a heating assembly 2, a detection assembly 3, a labyrinth assembly 4 and a bottom shell 5, a plurality of smoke inlets 501 are formed on the bottom shell 5, the labyrinth assembly 4 is installed on the bottom shell 5 and opposite to the smoke inlets 501, a labyrinth structure is formed inside the labyrinth assembly 4, the bottom shell 5 is installed on the lower side of the mounting seat 1, the detection assembly 3 is installed inside the mounting seat 1 and above the labyrinth assembly 4, the heating assembly 2 is installed inside the mounting seat 1 and arranged above the detection assembly 3 in intervals; the heating assembly 2 is configured to heat and conduct heat to make the internal temperature of the fire detector with the warming waterproof base greater than the external environment temperature.

[0031] Based on the above scheme, the detector is mainly composed of a mounting seat 1, a heating assembly 2, a detection assembly 3, a labyrinth assembly 4 and a bottom shell 5. A plurality of smoke inlets 501 designed on the bottom shell 5 allow air (including possible smoke) in the external environment to enter the inside of the detector. The labyrinth assembly 4 is installed on the bottom shell 5 opposite to the smoke inlets 501, and the labyrinth structure formed inside can effectively filter out most of the dust and larger particles, while slowing down the flow speed of the smoke or moisture, giving the detection assembly 3 more time to identify and analyze the entering gas. The heating assembly 2 is ingeniously installed inside the mounting seat 1 and above the detection assembly 3, and is arranged at intervals to ensure that the heat can be evenly distributed and effectively transmitted to the entire inside of the detector, especially around the labyrinth structure and the detection assembly 3. When the heating assembly 2 is started, it will raise the temperature inside the detector by heat conduction, so that it is higher than the external environment, especially higher than the dew point temperature, thereby preventing the moisture from condensing into water droplets in the labyrinth structure or inside the detector. Due to the action of the heating assembly 2, the inside of the detector remains dry, and the light scattering phenomenon is greatly reduced, ensuring that the detection assembly 3 can work in a relatively clean environment. This greatly improves the accuracy and stability of smoke detection, reduces false alarms caused by moisture, water droplets or dust.

[0032] Overall, by removing moisture and fog through heating, reducing light scattering and dust interference, the detection assembly 3 can more accurately identify fire smoke, reducing the false alarm rate. Long-term work in a humid environment, the internal circuit board and other components of the detector are prone to corrosion. The use of the heating assembly 2 effectively reduces the corrosion of the circuit board by moisture, prolongs the service life of the detector, and improves the overall stability of the system. This design is particularly suitable for humid areas such as coastal cities, as well as in specific climate conditions such as plum rain season and back to the south, ensuring the reliable operation of the fire detector with a heated waterproof base in these extreme environments. At the same time, due to the reduction of moisture-induced failures, the maintenance and maintenance of the detector are more convenient, reducing maintenance costs and downtime.

[0033] In some embodiments, the heating assembly 2 is also configured to obtain an external environment temperature T1, and after heating, the temperature of the fire detector with the heated waterproof base is T2, where 2℃≤T2-T1≤5℃. The heating assembly 2 not only has a heating function, but also has an intelligent temperature control feature. It can obtain the external environment temperature T1 in real time through the built-in sensor or in cooperation with other external temperature sensing devices. Based on this information, the heating assembly 2 intelligently adjusts its heating power to ensure that the temperature T2 inside the detector is maintained within a range that is higher than the external environment temperature T1 but not excessively high. That is, the heating assembly 2 is configured to keep the temperature difference (T2-T1) between the temperature T2 inside the detector and the external environment temperature T1 within 2-5℃. This temperature difference range is carefully considered: on the one hand, it is sufficient to prevent moisture from condensing inside the detector, reduce light scattering and dust interference, and improve smoke detection accuracy; on the other hand, it avoids the problems of increased energy consumption and excessive thermal stress of internal components of the detector caused by excessive temperature difference. Moreover, the intelligent temperature control feature enables the heating assembly 2 to automatically adjust the heating power according to changes in the external environment temperature, so that the detector can always operate at the optimal working temperature, improving the stability and reliability of the fire detector with the heated waterproof base, reducing energy consumption, and prolonging the service life of the detector.

[0034] Further, the heating assembly 2 includes a heating circuit board 201 mounted on the inner wall surface of the mounting seat 1, and a heating sheet 202 electrically connected to the heating circuit board 201. The heating circuit board 201, as the core component of the heating assembly 2, is ingeniously mounted on the inner wall surface of the mounting seat 1, not only ensuring that the heating circuit board 201 can uniformly transfer heat to the inside of the mounting seat 1, but also enabling heat to be more effectively radiated to the surrounding of the labyrinth structure and the detection assembly 3, thereby improving the heating efficiency. The heating sheet 202 electrically connected to the heating circuit board 201 plays a role in further heating and temperature regulation. The heating sheet 202 is usually made of materials with high thermal conductivity and good heat resistance to ensure stable heating performance even after a long time of work. By adjusting the number and layout of the heating sheet 202, precise control of the internal temperature of the detector can be achieved, thereby meeting the working requirements in different environments. The combined design of the heating circuit board 201 and the heating sheet 202 not only improves the heating efficiency and temperature control capability of the heating assembly 2, but also makes the entire detector more stable and reliable in dealing with high humidity environments, ensuring that the detector can maintain efficient operation under various harsh weather conditions, providing a more comprehensive and reliable solution for the fire automatic alarm system.

[0035] Further, the heating assembly 2 also includes a temperature control switch 203, which is integrated on the heating circuit board 201. The temperature control switch 203 is configured to automatically disconnect the power supply of the heating circuit board 201 when the operating temperature of the heating assembly 2 reaches 40℃. The temperature control switch 203 is ingeniously integrated on the heating circuit board 201, forming a compact and efficient heating control system. This not only simplifies the internal structure of the probe, but also improves the reliability and response speed of the heating assembly 2. The main function of the temperature control switch 203 is to monitor the operating temperature of the heating assembly 2 and take automatic measures to prevent overheating when necessary. Specifically, when the operating temperature of the heating assembly 2 reaches or exceeds 40℃, the temperature control switch 203 will automatically disconnect the power supply connected to the heating circuit board 201. This set temperature is based on the comprehensive consideration of the heat resistance of the internal components of the probe and the working efficiency of the heating assembly 2, aiming to ensure that the probe can maintain stable performance and safety under long-term work. The integrated design of the temperature control switch 203 not only improves the safety of the probe, but also makes the maintenance and management of the heating assembly 2 more convenient. Since the temperature control switch 203 is closely integrated with the heating circuit board 201, it is more convenient to troubleshoot and repair, reducing maintenance costs and time. The temperature control switch 203 not only enhances the safety of the probe, but also improves its overall reliability and stability. It ensures that in extreme cases, the probe can automatically take protective measures to avoid potential risks. At the same time, due to the fast and accurate response speed of the temperature control switch 203, it can also effectively reduce the downtime of the probe caused by overheating, improving the availability and efficiency of the system.

[0036] In the fire detector with a heated waterproof base described in this application, the detection assembly 3 is one of its core components, responsible for smoke detection and signal conversion. Generally speaking, the detection assembly 3 includes a detection circuit board 301, a photoelectric emitter tube 302, and a photoelectric receiver tube 303. The detection circuit board 301 serves as the control center of the detection assembly 3, responsible for receiving signals from the photoelectric receiver tube 303 and processing and judging them. It usually integrates complex circuits and algorithms, enabling accurate identification of the presence of smoke and converting signals into formats that the detector can understand and process. The photoelectric emitter tube 302 is responsible for emitting light, which propagates inside the maze structure and is received by the photoelectric receiver tube 303. When smoke enters the maze structure, it scatters or absorbs part of the light, causing the intensity of the light received by the photoelectric receiver tube 303 to change. This change is converted into an electrical signal and processed and judged by the detection circuit board 301. The photoelectric emitter tube 302 and the photoelectric receiver tube 303 are electrically connected to the detection circuit board 301 to ensure accurate signal transmission and processing. They are usually carefully placed inside the maze structure to ensure that they can capture the light changes caused by smoke to the greatest extent. Moreover, the design of the maze structure not only helps to filter out dust and larger particles, but also makes the light form a complex propagation path inside the maze, increasing the interaction opportunities between smoke and light, thereby improving the accuracy and sensitivity of smoke detection.

[0037] In addition, an accommodation space is formed between the mounting seat 1 and the bottom shell 5, and a base is arranged in the accommodation space. The control circuit board 6 is mounted on the base, and the control circuit board 6 is electrically connected to the detection circuit board 301 through a metal connecting piece 7. A carefully designed accommodation space is formed between the mounting seat 1 and the bottom shell 5, and this space is effectively utilized to install the base and the control circuit board 6. The base serves as the support structure of the control circuit board 6, not only providing a stable mounting foundation, but also realizing electrical connection between the control circuit board 6 and other components through interfaces and connection points on the base. The control circuit board 6 is the "brain" of the detector, responsible for receiving signals from the detection assembly 3, performing complex processing and analysis, and outputting corresponding control signals. It usually integrates high-performance microprocessors, memories, interface circuits, and other key components to ensure that the detector can accurately and quickly respond to abnormal conditions such as smoke. In order to realize the electrical connection between the detection circuit board 301 and the control circuit board 6, metal connecting pieces 7 are used. These connecting pieces are usually made of metal materials with good electrical conductivity, such as copper, aluminum, or alloys, to ensure stable and efficient signal transmission. They are cleverly designed on the base, facilitating installation and removal, and ensuring the reliability and durability of electrical connections.

[0038] At the same time, the control circuit board 6 is also connected with an alarm. The control circuit board 6 serves as the core control unit of the detector, not only responsible for receiving and processing signals from the detection assembly 3, but also undertakes the important task of converting the processing results into alarm signals. When the detection assembly 3 detects abnormal conditions such as smoke, the control circuit board 6 will quickly make a judgment and trigger the alarm to issue a warning. The alarm usually adopts the sound and light alarm mode, that is, it will not only emit high-decibel sound, but also light up the prominent indicator light or flicker light to attract people's attention. This double alarm mode not only improves the prominence and effectiveness of the alarm, but also enables the detector to play a good alarm effect in various environments.

[0039] In order to realize the connection of the alarm with the control circuit board 6, reliable electrical connection methods such as plug-in connection, welding connection, etc. are adopted. These connection methods not only ensure stable signal transmission, but also make the installation and removal of the alarm more convenient and fast.

[0040] The labyrinth structure, as one of the core components of the detector, has a complex light path and air channel design inside, which aims to effectively filter out dust, particulate matter and larger insects, etc. to ensure that the detection assembly 3 can accurately capture the light changes caused by smoke. However, in some special environments, such as outdoor or humid areas, small insects may enter the detector through the inlet end of the labyrinth structure, causing interference or damage to the detection assembly 3. In order to solve this problem, an insect screen 8 is provided at the inlet end of the labyrinth structure. The insect screen 8 is usually made of fine metal wires or synthetic fibers, which can effectively block the entry of small insects, while not affecting the circulation of air and smoke. This design not only improves the anti-interference ability of the detector, but also prolongs its service life and reduces maintenance costs.

[0041] It is worth mentioning that the bottom shell 5 is in the shape of an inverted circular truncated cone, and the outer peripheral wall of the lower part is hollow to form a plurality of smoke inlets 501. The design of the inverted circular truncated cone makes the lower part of the bottom shell 5 gradually narrow. This shape helps to guide the water flow to slide along the outer wall of the bottom shell 5, rather than accumulate inside the detector or enter the smoke inlets 501. This natural drainage feature enables the detector to remain dry inside when facing adverse environments such as rain and humidity, avoiding the risk of electrical components being damaged by moisture. At the same time, the plurality of smoke inlets 501 formed by the hollow outer peripheral wall of the lower part of the bottom shell 5 not only provide a passage for smoke to enter, but also fully consider the waterproofing requirements in the design. The size and shape of the smoke inlets 501 are carefully calculated to ensure that they can effectively block the entry of water droplets and other liquids without affecting the entry of smoke.

[0042] Preferably, the mounting seat 1 is made of polyvinyl chloride plastic material; and / or the bottom shell 5 is made of polyvinyl chloride plastic material. Polyvinyl chloride plastic material has good heat resistance and flame retardance, with a heat distortion temperature as high as 130℃, which means that even in a high-temperature environment, the mounting seat 1 and the bottom shell 5 can maintain stable shape and performance, without affecting the normal operation of the detector due to heat distortion. At the same time, the flame retardance of PVC plastic material is also very good, even if it encounters a fire source, it can effectively prevent the spread of fire, thereby protecting the electrical components and circuits inside the detector from damage. For the heating assembly 2, since it itself will not burn and the temperature generated during normal operation is relatively low (tested at an ambient temperature of 20℃, the temperature of the heated heating assembly 2 itself is lower than 40℃, while the temperature inside the mounting seat 1 and the bottom shell 5 is about 25℃), it will not cause thermal damage to the mounting seat 1 and the bottom shell 5, which further verifies the feasibility of PVC plastic material as the material of the mounting seat 1 and the bottom shell 5.

[0043] In summary, using polyvinyl chloride plastic material to make the mounting seat 1 and the bottom shell 5 not only reduces the manufacturing cost of the detector and improves its processing performance, but more importantly, it ensures the safety and stability of the detector when it faces high temperature and fire. This design enables the detector to issue an alarm more accurately when a fire occurs, providing strong protection for people's life and property safety. At the same time, there is no need to worry about the risk of secondary fire caused by the burning of the plastic shell due to the high temperature of the heating assembly 2.

[0044] In the description herein, it should be understood that the terms "upper", "lower", "left", "right", and the like orientation or position relationship are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0045] In the description of the present specification, the description referring to the terms "an embodiment", "an example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.

[0046] In addition, it should be understood that although the present specification is described in terms of embodiments, each embodiment does not necessarily contain only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

[0047] The technical principles of the present application are described above in conjunction with specific embodiments. These descriptions are only to explain the principles of the present application and cannot be interpreted as limiting the protection scope of the present application in any way. Based on the explanations herein, other specific embodiments of the present application can be conceived by those skilled in the art without any creative effort, and these embodiments will all fall within the protection scope of the present application.

Claims

1. A fire detector having a heated water resistant base, characterized by, The application relates to a fire detector with a heating waterproof base, which comprises a mounting seat (1), a heating assembly (2), a detection assembly (3), a labyrinth assembly (4) and a bottom shell (5), a plurality of smoke inlets (501) are formed in the bottom shell (5), the labyrinth assembly (4) is mounted on the bottom shell (5) and is opposite to the positions of the smoke inlets (501), a labyrinth structure is formed in the labyrinth assembly (4), the bottom shell (5) is mounted on the lower side of the mounting seat (1), the detection assembly (3) is mounted in the mounting seat (1) and is located above the labyrinth assembly (4), and the heating assembly (2) is mounted in the mounting seat (1) and is arranged above the detection assembly (3) in a spaced mode. The heating assembly (2) is configured to heat and conduct heat to make the internal temperature of the fire detector with the heating waterproof base higher than the external environment temperature. The heating assembly (2) is further configured to acquire the external environment temperature T1, and heat and conduct heat to make the temperature of the fire detector with the heating waterproof base T2 after the heating assembly (2) is heated, wherein 2 DEG C <= T2-T1 <= 5 DEG C.

2. The fire detector with a heated, water-resistant base of claim 1, wherein, The heating assembly (2) comprises a heating circuit board (201) mounted on the inner wall surface of the mounting seat (1) and a heating sheet (202) electrically connected with the heating circuit board (201).

3. The fire detector with a heated, water-resistant base of claim 1, wherein, The heating assembly (2) further comprises a temperature control switch (203) integrated on the heating circuit board (201), and the temperature control switch (203) is configured to automatically disconnect the power supply of the heating circuit board (201) when the working temperature of the heating assembly (2) is higher than 40 DEG C.

4. The fire detector with a heated, water-resistant base of claim 3, wherein, The detection assembly (3) comprises a detection circuit board (301), a photoelectric emission tube (302) and a photoelectric receiving tube (303), the photoelectric emission tube (302) and the photoelectric receiving tube (303) are electrically connected with the detection circuit board (301) and are arranged in the labyrinth structure.

5. The fire detector with a heated, water-resistant base of any of claims 1-4, wherein, An accommodation space is formed between the mounting seat (1) and the bottom shell (5), a base is arranged in the accommodation space, a control circuit board (6) is mounted on the base, and the control circuit board (6) is electrically connected with the detection circuit board (301) through a metal connecting piece (7).

6. The fire detector with a heated, water-resistant base of claim 5, wherein, The control circuit board (6) is further connected with an alarm.

7. The fire detector with a heated, water-resistant base of claim 6, wherein, An insect screen (8) is arranged at the inlet end of the labyrinth structure.

8. The fire detector with a heated, water-resistant base of any of claims 1-4, wherein, The bottom shell (5) is in the shape of an inverted circular table, and the outer peripheral wall of the lower part is hollow to form a plurality of smoke inlets (501).

9. The fire detector with a heated, water-resistant base of any of claims 1-4, wherein, The mounting seat (1) is made of polyvinyl chloride plastic material; and / or the bottom shell (5) is made of polyvinyl chloride plastic material.

10. The fire detector with a heated, water-resistant base of any of claims 1-4, wherein, ​

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