Fire alarm device

Abstract

The invention discloses a fire alarm device, and relates to the technical field of smoke alarm devices, the fire alarm device comprises a main body mechanism, the main body mechanism comprises a first shell, the bottom of the first shell is fixedly communicated with a second shell, the inner wall of the first shell is provided with a placement cavity, and the inner top of the placement cavity is fixedly connected with an ionization detection piece; the surface of the second shell is fixedly communicated with a plurality of smoke inlet nozzles, a smoke mixing mechanism is arranged in an inner cavity of the second shell, an opening and closing mechanism is arranged in an inner cavity of the containing cavity, and the opening and closing mechanism is used for providing a channel for evenly-mixed smoke to make contact with the ionization detection piece. Through cooperative use of the smoke mixing mechanism and the opening and closing mechanism, smoke with different concentrations entering each smoke inlet nozzle can be mixed, the concentration uniformity is ensured, and the accuracy of a detection result is improved, so that the probability of misjudgment is reduced, and the waste probability of fire-fighting resources is reduced.

Description

Technical Field

[0001] This invention relates to the field of smoke alarm devices, specifically a fire alarm device. Background Technology

[0002] A fire alarm device is a comprehensive safety system used to detect fire characteristic parameters (such as smoke, temperature, flame, etc.) in the early stage and realize fire early warning and emergency response through audible and visual alarms, linkage control and other means. Its core function is to build a closed-loop protection system for fire detection, alarm and linkage.

[0003] Smoke alarm devices are active safety devices used to detect smoke particles generated by fire in the early stages and issue alarms through sound and light signals. Their core function is to detect changes in smoke concentration in the environment in real time through physical or chemical sensors. When the concentration exceeds a preset threshold, an alarm is triggered to remind people to evacuate or to activate the fire linkage system.

[0004] When smoke alarm devices are in use, it is not convenient to mix the incoming smoke to make the smoke concentration uniform before detection. As a result, when smoke of uneven concentration enters the smoke alarm device, it is easy to cause false alarms, thus wasting fire protection resources.

[0005] Combining the above issues, we find that existing fire alarm devices on the market are difficult to simultaneously avoid these problems during use. Even if they can be solved, they require external tools, thus failing to achieve the desired effect. Therefore, we propose a fire alarm device. Summary of the Invention

[0006] The purpose of this invention is to provide a fire alarm device to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a fire alarm device, comprising a main body, the main body comprising a first housing, a second housing fixedly connected to the bottom of the first housing, a placement cavity formed in the inner wall of the first housing, an ionization detector fixedly connected to the top of the placement cavity, a plurality of smoke inlets fixedly connected to the surface of the second housing, a smoke mixing mechanism provided in the inner cavity of the second housing, and an opening and closing mechanism provided in the inner cavity of the placement cavity, the opening and closing mechanism being used to provide a channel for the uniformly mixed smoke to contact the ionization detector; The smoke mixing mechanism includes a homogenizing unit disposed in the inner cavity of the second housing, and the homogenizing unit is used to homogenize the smoke entering from the plurality of smoke inlets; The smoke mixing mechanism also includes a smoke cessation unit, which is disposed in the inner cavity of the second housing. The smoke cessation unit is used to temporarily store the uniformly mixed smoke and provide the driving force for its outflow.

[0008] Preferably, the uniform unit includes a first rotating rod rotatably connected to the inner wall of the second housing via a bearing. A turbine blade is fixedly sleeved on the surface of the first rotating rod. A second rotating rod is rotatably connected to the top of the first rotating rod. A sliding groove is formed at the top of the second rotating rod. A first spiral groove is formed on the inner wall of the sliding groove. A drive rod is slidably connected to the inner cavity of the sliding groove. A protrusion is fixedly connected to the surface of the drive rod. A rotating column is rotatably connected to one end of the protrusion. The surface of the rotating column is slidably connected to the inner cavity of the first spiral groove. A mist collecting cylinder is slidably connected to the inner wall of the second housing. The top of the mist collecting cylinder extends into the inner cavity of the placement chamber. A crossbar is fixedly connected to the inner wall of the mist collecting cylinder. The top of the drive rod is fixedly connected to the bottom of the crossbar. Two multiple electric actuators are fixedly connected to the inner wall of the second housing. Two positioning blocks are fixedly connected to the surface of the mist collecting cylinder. The telescopic ends of the multiple electric actuators are fixedly connected to the tops of the positioning blocks.

[0009] Preferably, the smoke inlet includes a conical block and a cylinder, the conical block and the cylinder are fixedly connected, the surface of the cylinder is fixedly connected to the inner wall of the second housing, the inner wall of the cylinder is provided with a second spiral groove, and the smoke inlet is inclined downward at 30 degrees.

[0010] Preferably, a dustproof net is provided at the large opening end of the conical block, a first magnetic ring is fixedly connected to the large opening end of the conical block, and a second magnetic ring is fixedly connected to one side of the dustproof net, with the first magnetic ring and the second magnetic ring being magnetically connected.

[0011] Preferably, the inner wall of the second housing has a plurality of vent holes, and the surface of the mist collecting cylinder is fixedly connected with a plurality of plug rods. The position and number of the plug rods correspond one-to-one with the number and position of the vent holes. The plug rods are slidably connected to the inner cavity of the vent holes, and the plug rods are made of silicone material.

[0012] Preferably, one end of the first rotating rod is provided with a one-way bearing, the inner wall of the inner ring of the one-way bearing is fixedly sleeved on the surface of the second rotating rod, and the outer wall of the outer ring of the one-way bearing is fixedly connected to the inner wall of the first rotating rod.

[0013] Preferably, the smoke-stopping unit includes a conical cylinder, the surface of which is fixedly connected to the inner wall of the mist-collecting cylinder, the large end of which contacts the crossbar, a one-way valve is fixedly connected to the inner wall of the small end of which, a support frame is fixedly connected to the inner wall of the mist-collecting cylinder, and an elastic membrane is fixedly connected to the inner side of the support frame.

[0014] Preferably, the opening and closing mechanism includes an vent at the top of the support frame, two mounting blocks are fixedly connected to the bottom of the support frame, the two mounting blocks are arranged opposite to each other, a rotating rod is rotatably connected to the inner wall of the two mounting blocks, a sealing block is fixedly connected to the surface of the rotating rod, the sealing block is used to seal the vent, a vertical rod is fixedly connected to the top of the second housing, a blocking rod is fixedly connected to the top of the vertical rod, and one end of the blocking rod cooperates with the sealing block.

[0015] Preferably, two torsion springs are slidably sleeved on the surface of the rotating rod. The two torsion springs are located on both sides of the sealing block, and the ends of the two torsion springs that are far apart from each other are fixedly connected to one side of the two mounting blocks, while the ends of the two torsion springs that are close to each other are fixedly connected to both sides of the sealing block.

[0016] Preferably, a sealing strip is fixedly connected to one side of the sealing block, and one side of the sealing strip is used in conjunction with the bottom of the support frame. The sealing strip is made of silicone material.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. By setting up a uniform unit, the present invention can mix the smoke entering from smoke inlets from different directions, ensuring the uniformity of concentration and avoiding misjudgment due to excessively high local smoke concentration, thereby reducing the chance of wasting fire-fighting resources. 2. By setting up a smoke cessation unit, the present invention can temporarily gather the uniformly mixed smoke, causing the elastic membrane to deform. When the smoke outlet is opened, the reaction force of the elastic membrane compresses the smoke, accelerating the smoke to flow into the placement chamber, thereby speeding up the detection speed of the uniformly mixed smoke concentration. 3. By incorporating an opening and closing mechanism, this invention can release the uniformly mixed smoke stored in the smoke-stopping unit, allowing the smoke to enter the inner cavity of the placement chamber and come into contact with the ionization detection element. This accelerates the detection speed of the uniformly mixed smoke concentration and improves the accuracy of the detection. Furthermore, the combined use of the smoke mixing mechanism and the opening and closing mechanism enables the mixing of smoke of different concentrations entering from various smoke inlets, ensuring concentration uniformity, improving the accuracy of the detection results, reducing the probability of misjudgment, and minimizing the waste of fire-fighting resources. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram showing the disassembly of the first and second housings of the present invention; Figure 3 This is a partial three-dimensional schematic diagram of the uniform unit of the present invention; Figure 4 This is a three-dimensional cross-sectional view of the smoke inlet of the present invention; Figure 5 This is a three-dimensional cross-sectional view of the mist collecting cylinder of the present invention; Figure 6 This is a three-dimensional cross-sectional view of the second rotating rod of the present invention; Figure 7 This is a cross-sectional view showing the installation of the first rotating rod, the second rotating rod, and the one-way bearing of the present invention. Figure 8 For the present invention Figure 6 Enlarged view of point A in the middle; Figure 9 This is a three-dimensional schematic diagram of the vent hole of the present invention; Figure 10 This is a partial three-dimensional schematic diagram of the opening and closing mechanism of the present invention.

[0019] In the diagram: 1. Main body; 11. First housing; 12. Second housing; 13. Placement cavity; 14. Ionization detector; 15. Smoke inlet; 151. Conical block; 152. Cylinder; 153. Second spiral groove; 2. Smoke mixing mechanism; 21. Uniform unit; 2101. First rotating rod; 2102. Turbine fan blade; 2103. Second rotating rod; 2104. Sliding groove; 2105. First spiral groove; 2106. Drive rod; 2107. Protruding cylinder; 2108. Rotating column; 2109. Fog collection cylinder; 2110. Crossbar; 211 1. Multiple electric actuators; 2112. Positioning block; 2113. One-way bearing; 2114. Dustproof net; 2115. First magnetic ring; 2116. Second magnetic ring; 2117. Vent hole; 2118. Blocking rod; 22. Smoke stopping unit; 2201. Conical cylinder; 2202. One-way valve; 2203. Support frame; 2204. Elastic diaphragm; 3. Opening and closing mechanism; 301. Exhaust port; 302. Mounting block; 303. Rotating rod; 304. Sealing block; 305. Upright rod; 306. Stop rod; 307. Torsion spring; 308. Sealing strip. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1: Please refer to Figures 1-10This invention provides a technical solution: a fire alarm device, including a main body 1, the main body 1 including a first housing 11. Smoke alarm devices are usually powered by batteries. The smoke alarm device here can adopt a dual power supply method, with both circuit power supply and battery power supply. This is a mature existing technology, so it will not be described in detail. The bottom of the first housing 11 is fixedly connected to a second housing 12. The inner wall of the first housing 11 has a placement cavity 13. The top of the placement cavity 13 is fixedly connected to an ionization detector 14. The ionization detector 14 corresponds to an existing ionization smoke detector. Its core detection component is an ionization chamber. The principle of ionization smoke detectors to detect smoke concentration is a mature existing technology, so it will not be described in detail. The ionization detector 14 used here is model 7010B. The surface of the second housing 12 is fixedly connected to several smoke inlets 15. The inner cavity of the second housing 12 is provided with a smoke mixing mechanism 2. The inner cavity of the placement cavity 13 is provided with an opening and closing mechanism 3. The opening and closing mechanism 3 is used to provide a channel for the uniformly mixed smoke to contact the ionization detector 14. The smoke mixing mechanism 2 includes a uniform unit 21, which is disposed in the inner cavity of the second housing 12. The uniform unit 21 is used to uniformly mix the smoke entering from a plurality of smoke inlets 15. The smoke mixing mechanism 2 also includes a smoke stopping unit 22, which is disposed in the inner cavity of the second housing 12. The smoke stopping unit 22 is used to temporarily store the uniformly mixed smoke and provide the driving force for the outflow.

[0022] As a further definition of the smoke mixing mechanism 2 of the present invention, the uniform unit 21 includes a first rotating rod 2101 rotatably connected to the inner wall of the second housing 12 via a bearing. A turbine blade 2102 is fixedly sleeved on the surface of the first rotating rod 2101. A second rotating rod 2103 is rotatably connected to the top of the first rotating rod 2101. A sliding groove 2104 is formed at the top of the second rotating rod 2103. A first spiral groove 2105 is formed on the inner wall of the sliding groove 2104. A driving rod 2106 is slidably connected to the inner cavity of the sliding groove 2104. A protrusion 2107 is fixedly connected to the surface of the driving rod 2106. A rotating column 2108 is rotatably connected to one end of the protrusion 2107. The surface of the rotating column 2108 is slidably connected to the inner cavity of the first spiral groove 2105. The second housing 1 A mist collecting cylinder 2109 is slidably connected to the inner wall of housing 2. The top end of the mist collecting cylinder 2109 extends into the inner cavity of the placement chamber 13. A crossbar 2110 is fixedly connected to the inner wall of the mist collecting cylinder 2109. The top end of the drive rod 2106 is fixedly connected to the bottom of the crossbar 2110. Two multi-pole electric actuators 2111 are fixedly connected to the inner wall of the second housing 12. Two positioning blocks 2112 are fixedly connected to the surface of the mist collecting cylinder 2109. The telescopic ends of the multi-pole electric actuators 2111 are fixedly connected to the top of the positioning blocks 2112. By setting a uniform unit 21, the smoke entering from the smoke inlet 15 from different directions can be mixed to ensure the uniformity of concentration and avoid misjudgment due to excessively high local smoke concentration, thereby reducing the chance of wasting fire-fighting resources.

[0023] The smoke inlet 15 includes a conical block 151 and a cylinder 152. The conical block 151 and the cylinder 152 are fixedly connected. The surface of the cylinder 152 is fixedly connected to the inner wall of the second housing 12. The inner wall of the cylinder 152 is provided with a second spiral groove 153. The smoke inlet 15 is inclined downward at 30 degrees. By setting the conical block 151, the cylinder 152 and the second spiral groove 153 to work together, the conical block 151 can expand the smoke entry channel, which facilitates the entry of smoke. When the smoke enters the cylinder 152 through the conical block 151, it will move along the trajectory of the second spiral groove 153, thereby increasing the turbulence when the smoke enters the inner cavity of the second housing 12 and improving the smoke mixing efficiency.

[0024] A dustproof net 2114 is provided at the large end of the conical block 151. A first magnetic ring 2115 is fixedly connected to the large end of the conical block 151, and a second magnetic ring 2116 is fixedly connected to one side of the dustproof net 2114. The first magnetic ring 2115 and the second magnetic ring 2116 are magnetically connected. By setting up the dustproof net 2114, the first magnetic ring 2115 and the second magnetic ring 2116 for coordinated use, the magnetic attraction between the first magnetic ring 2115 and the second magnetic ring 2116 can realize the magnetic connection between the dustproof net 2114 and the large end of the conical block 151, thereby filtering the smoke. The magnetic attraction also makes it easy to install and remove the dustproof net 2114.

[0025] The inner wall of the second housing 12 is provided with several ventilation holes 2117. Several blocking rods 2118 are fixedly connected to the surface of the mist collecting cylinder 2109. The position and number of blocking rods 2118 correspond one-to-one with the number and position of ventilation holes 2117. The blocking rods 2118 are slidably connected to the inner cavity of the ventilation holes 2117. The blocking rods 2118 are made of silicone material. By setting the ventilation holes 2117 and the blocking rods 2118 in cooperation, in the initial state, the blocking rods 2118 are located above the ventilation holes 2117. The blocking rods 2118 will not block the ventilation holes 2117, which is convenient for the ionization detection device 14 to sense the smoke in the early stage.

[0026] One end of the first rotating rod 2101 is provided with a one-way bearing 2113. The inner wall of the inner ring of the one-way bearing 2113 is fixedly sleeved on the surface of the second rotating rod 2103, and the outer wall of the outer ring of the one-way bearing 2113 is fixedly connected to the inner wall of the first rotating rod 2101. By setting the one-way bearing 2113, when the drive rod 2106 moves down and drives the second rotating rod 2103 to rotate, the one-way bearing 2113 is in a locked state. The rotation of the second rotating rod 2103 can drive the first rotating rod 2101 to rotate, thereby realizing the rotation of the turbine blade 2102 and realizing the collection and mixing of smoke. When the drive rod 2106 moves up, the one-way bearing 2113 is in an unlocked state, so the rotation of the second rotating rod 2103 will not drive the first rotating rod 2101 and the turbine blade 2102 to rotate, thereby avoiding the reverse rotation of the turbine blade 2102 and avoiding the dispersion of smoke.

[0027] The specific implementation of this embodiment is as follows: When smoke appears in the environment, the smoke enters the inner cavity of the second housing 12 through the smoke inlet 15. The smoke passing through the smoke inlet 15 first changes its movement trajectory through the second spiral groove 153, increasing the turbulence entering the inner cavity of the second housing 12 and improving the mixing efficiency. The smoke entering the inner cavity of the second housing 12 first enters the inner cavity of the placement cavity 13 of the first housing 11 through the vent 2117. The ionization detector 14 senses the entering smoke. This is the first detection and will not trigger an alarm. It will only activate the multiple electric actuator 2111. Through the extension of the telescopic end of the multiple electric actuator 2111, the positioning block 211 is pushed downward. 2. The mist collecting cylinder 2109 moves downward, causing the blocking rod 2118 to block the vent 2117, preventing smoke from the inner cavity of the second housing 12 from entering the placement cavity 13 and affecting the detection effect. Simultaneously, the downward movement of the mist collecting cylinder 2109 causes the horizontal bar 2110 to move downward. The downward movement of the horizontal bar 2110 causes the drive rod 2106 to move downward within the sliding groove 2104. The downward movement of the drive rod 2106 causes the protruding cylinder 2107 and the rotating column 2108 to move downward. The rotating column 2108 slides within the first spiral groove 2105, coordinating with the trajectory of the first spiral groove 2105 to achieve the rotation of the second rotating rod 2103. At this time, the one-way bearing 2113 is locked. In this state, the rotation of the second rotating rod 2103 drives the first rotating rod 2101 to rotate, and the rotation of the first rotating rod 2101 drives the turbine fan blade 2102 to rotate. The rotation of the turbine fan blade 2102 enables the smoke entering from each smoke inlet 15 to be concentrated and mixed, and moves radially upward along the mist collecting cylinder 2109. The mixed smoke, driven by the turbine fan blade 2102, enters the smoke stopping unit 22. When the bottom of the mist collecting cylinder 2109 contacts the inner bottom of the second housing 12, the multiple electric actuator 2111 is controlled to retract, thereby driving the mist collecting cylinder 2109 to move upward. The upward movement of the mist collecting cylinder 2109 drives the drive rod 2106 to slide in the groove. The inner cavity of 2104 moves upward, causing the convex cylinder 2107 and the rotating column 2108 to move upward. The upward movement of the rotating column 2108, in conjunction with the first spiral groove 2105, causes the first rotating column 2108 to rotate. At this time, the one-way bearing 2113 is in a locked state, and the rotation of the first rotating column 2108 will not cause the second rotating column 2108 to rotate. Therefore, it will not cause the turbine fan blade 2102 to reverse and cause the smoke to dissipate. When the mist collecting cylinder 2109 moves upward, it causes the blocking rod 2118 to move upward. This return stroke will not rise to the initial height, ensuring that the blocking rod 2118 still blocks the vent 2117, avoiding the impact of unevenly mixed smoke on the detection results.

[0028] Example 2: Please refer to Figures 1-10 The present invention provides a technical solution: a fire alarm device, which makes corresponding improvements to the technical problems mentioned in the background art.

[0029] As a further definition of the smoke mixing mechanism 2 of the present invention, the smoke stopping unit 22 includes a conical cylinder 2201. The surface of the conical cylinder 2201 is fixedly connected to the inner wall of the mist collecting cylinder 2109. The large end of the conical cylinder 2201 contacts the crossbar 2110. A one-way valve 2202 is fixedly connected to the inner wall of the small end of the conical cylinder 2201. A support frame 2203 is fixedly connected to the inner wall of the mist collecting cylinder 2109. An elastic membrane 2204 is fixedly connected to the inner side of the support frame 2203. By setting the smoke stopping unit 22, the smoke after uniform mixing can be temporarily gathered, causing the elastic membrane 2204 to deform. When the smoke outlet is opened, the reaction force of the elastic membrane 2204 compresses the smoke, accelerating the smoke to flow into the placement chamber 13, thereby speeding up the detection speed of the uniformly mixed smoke concentration.

[0030] The specific implementation of this embodiment is as follows: The rotation of the turbine fan blade 2102 drives the mixed smoke upward in the inner cavity of the mist collection cylinder 2109. The smoke enters the area below the support frame 2203 through the one-way valve 2202. The support frame 2203, the elastic membrane 2204 and the opening and closing mechanism 3 form a closed surface to block the smoke from entering. As the amount of smoke increases, the elastic membrane 2204 is stretched and deformed. The elastic membrane 2204 is a polyurethane elastomer film with a thickness of 2 micrometers, thereby achieving temporary storage of the mixed smoke. Furthermore, the deformation of the elastic membrane 2204 stores energy for the release of the uniformly mixed smoke.

[0031] Example 3: Please refer to Figures 1-10 The present invention provides a technical solution: a fire alarm device, which makes corresponding improvements to the technical problems mentioned in the background art.

[0032] As a further definition of the opening and closing mechanism 3 of the present invention, the opening and closing mechanism 3 includes an vent 301 opened on the top of the support frame 2203. Two mounting blocks 302 are fixedly connected to the bottom of the support frame 2203. The two mounting blocks 302 are arranged opposite to each other. A rotating rod 303 is rotatably connected to the inner wall of the two mounting blocks 302. A blocking block 304 is fixedly connected to the surface of the rotating rod 303. The blocking block 304 is used to block the vent 301. A vertical rod 305 is fixedly connected to the top of the second housing 12. A blocking rod 306 is fixedly connected to the top of the vertical rod 305. One end of the blocking rod 306 is used in conjunction with the blocking block 304. By setting the opening and closing mechanism 3, the uniformly mixed smoke stored in the smoke stopping unit 22 can be released, allowing the smoke to enter the inner cavity of the placement cavity 13 and contact the ionization detector 14, thereby accelerating the detection speed of the uniformly mixed smoke concentration and improving the detection accuracy.

[0033] Two torsion springs 307 are slidably sleeved on the surface of the rotating rod 303. The two torsion springs 307 are located on both sides of the sealing block 304. The ends of the two torsion springs 307 that are far apart from each other are fixedly connected to one side of the two mounting blocks 302, and the ends of the two torsion springs 307 that are close to each other are fixedly connected to both sides of the sealing block 304. By setting the torsion springs 307, the rotation angle of the rotating rod 303 can be elastically adjusted, and the reaction force of the torsion springs 307 can be used to reset the rotating rod 303 after rotation, and ensure that the sealing block 304 is in close contact with the support frame 2203.

[0034] A sealing strip 308 is fixedly connected to one side of the sealing block 304. One side of the sealing strip 308 is used in conjunction with the bottom of the support frame 2203. The sealing strip 308 is made of silicone material. By setting the sealing strip 308, the sealing performance between the sealing block 304 and the support frame 2203 can be increased. The flexibility of the sealing gasket fills the unevenness on the surface of the support frame 2203, thereby increasing the sealing performance between the sealing block 304 and the support frame 2203.

[0035] The specific implementation of this embodiment is as follows: As the mist collecting cylinder 2109 moves upward, it drives the support frame 2203 to move upward. The upward movement of the support frame 2203 drives the mounting block 302, rotating rod 303, torsion spring 307, sealing block 304 and sealing strip 308 to move upward. When it moves to the designated position, the top of the sealing block 304 contacts one end of the blocking rod 306. As the sealing block 304 continues to move upward, the blocking rod 306 generates resistance to the upward movement of the sealing block 304, causing the sealing block 304 to flip downward. The rotation of the sealing block 304 drives the rotating rod 303 to rotate, thereby generating torque on the two torsion springs 307. As the sealing block 304 releases the blockage of the vent 301, the reaction force of the elastic membrane 2204 compresses the uniformly mixed smoke, allowing the uniformly mixed smoke to enter the placement chamber 13 through the vent 301. The concentration is detected by the ionization detector 14, thereby improving the accuracy of the detection results.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fire alarm device, comprising a main body (1), the main body (1) comprising a first housing (11), the bottom of the first housing (11) being fixedly connected to a second housing (12), the inner wall of the first housing (11) having a placement cavity (13), the inner top of the placement cavity (13) being fixedly connected to an ionization detector (14), and the surface of the second housing (12) being fixedly connected to a plurality of smoke inlets (15), characterized in that: The inner cavity of the second housing (12) is provided with a smoke mixing mechanism (2), and the inner cavity of the placement cavity (13) is provided with an opening and closing mechanism (3). The opening and closing mechanism (3) is used to provide a channel for the uniformly mixed smoke to contact the ionization detector (14). The smoke mixing mechanism (2) includes a uniform unit (21), which is disposed in the inner cavity of the second housing (12). The uniform unit (21) is used to uniformly mix the smoke entering from the plurality of smoke inlets (15). The smoke mixing mechanism (2) further includes a smoke stopping unit (22), which is disposed in the inner cavity of the second housing (12). The smoke stopping unit (22) is used to temporarily store the uniformly mixed smoke and provide the driving force for the outflow.

2. A fire alarm device according to claim 1, characterized in that: The uniform unit (21) includes a first rotating rod (2101) rotatably connected to the inner wall of the second housing (12) via a bearing. A turbine fan blade (2102) is fixedly sleeved on the surface of the first rotating rod (2101). A second rotating rod (2103) is rotatably connected to the top of the first rotating rod (2101). A sliding groove (2104) is provided at the top of the second rotating rod (2103). A first spiral groove (2105) is provided on the inner wall of the sliding groove (2104). A drive rod (2106) is slidably connected to the inner cavity of the sliding groove (2104). A protrusion (2107) is fixedly connected to the surface of the drive rod (2106). A rotating column (2108) is rotatably connected to one end of the protrusion (2107). The surface of (2108) is slidably connected to the inner cavity of the first spiral groove (2105), and the inner wall of the second housing (12) is slidably connected to the mist collecting cylinder (2109). The top end of the mist collecting cylinder (2109) extends to the inner cavity of the placement cavity (13). The inner wall of the mist collecting cylinder (2109) is fixedly connected to the crossbar (2110). The top end of the drive rod (2106) is fixedly connected to the bottom of the crossbar (2110). The inner wall of the second housing (12) is fixedly connected to two multi-electrode push rods (2111). The surface of the mist collecting cylinder (2109) is fixedly connected to two positioning blocks (2112). The telescopic end of the multi-electrode push rod (2111) is fixedly connected to the top of the positioning block (2112).

3. A fire alarm device according to claim 2, characterized in that: The inlet nozzle (15) includes a conical block (151) and a cylinder (152). The conical block (151) is fixedly connected to the cylinder (152). The surface of the cylinder (152) is fixedly connected to the inner wall of the second housing (12). The inner wall of the cylinder (152) is provided with a second spiral groove (153). The inlet nozzle (15) is inclined downward at 30 degrees.

4. A fire alarm device according to claim 3, characterized in that: The cone-shaped block (151) is provided with a dustproof net (2114) at its large opening end. A first magnetic ring (2115) is fixedly connected to the large opening end of the cone-shaped block (151). A second magnetic ring (2116) is fixedly connected to one side of the dustproof net (2114). The first magnetic ring (2115) and the second magnetic ring (2116) are magnetically connected.

5. A fire alarm device according to claim 2, characterized in that: The inner wall of the second housing (12) is provided with a number of ventilation holes (2117), and a number of plug rods (2118) are fixedly connected to the surface of the mist collecting cylinder (2109). The position and number of the plug rods (2118) correspond one-to-one with the number and position of the ventilation holes (2117). The plug rods (2118) are slidably connected to the inner cavity of the ventilation holes (2117). The plug rods (2118) are made of silicone material.

6. A fire alarm device according to claim 2, characterized in that: One end of the first rotating rod (2101) is provided with a one-way bearing (2113). The inner wall of the inner ring of the one-way bearing (2113) is fixedly sleeved on the surface of the second rotating rod (2103), and the outer wall of the outer ring of the one-way bearing (2113) is fixedly connected to the inner wall of the first rotating rod (2101).

7. A fire alarm device according to claim 2, characterized in that: The smoke-stopping unit (22) includes a conical cylinder (2201), the surface of which is fixedly connected to the inner wall of the mist collecting cylinder (2109), the large end of which is in contact with the crossbar (2110), a one-way valve (2202) is fixedly connected to the inner wall of the small end of which, a support frame (2203) is fixedly connected to the inner wall of the mist collecting cylinder (2109), and an elastic membrane (2204) is fixedly connected to the inner side of the support frame (2203).

8. A fire alarm device according to claim 7, characterized in that: The opening and closing mechanism (3) includes an vent (301) opened on the top of the support frame (2203). Two mounting blocks (302) are fixedly connected to the bottom of the support frame (2203). The two mounting blocks (302) are arranged opposite to each other. A rotating rod (303) is rotatably connected to the inner wall of the two mounting blocks (302). A blocking block (304) is fixedly connected to the surface of the rotating rod (303). The blocking block (304) is used to block the vent (301). A vertical rod (305) is fixedly connected to the top of the second housing (12). A blocking rod (306) is fixedly connected to the top of the vertical rod (305). One end of the blocking rod (306) is used in conjunction with the blocking block (304).

9. A fire alarm device according to claim 8, characterized in that: Two torsion springs (307) are slidably sleeved on the surface of the rotating rod (303). The two torsion springs (307) are located on both sides of the sealing block (304). The ends of the two torsion springs (307) that are far apart from each other are fixedly connected to one side of the two mounting blocks (302), and the ends of the two torsion springs (307) that are close to each other are fixedly connected to both sides of the sealing block (304).

10. A fire alarm device according to claim 8, characterized in that: A sealing strip (308) is fixedly connected to one side of the sealing block (304). One side of the sealing strip (308) is used in conjunction with the bottom of the support frame (2203). The sealing strip (308) is made of silicone material.

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