An automatic fire sprinkler

Abstract

The application discloses an automatic fire sprinkler, comprising: an inner shell, the inner shell is hollow formed for accommodating the core of the accommodation cavity, the inner shell is provided with a first opening, the first opening is communicated with the accommodation cavity; the outer shell is hollow formed cavity, the inner shell is arranged in the cavity, the outer side wall surface of the inner shell and the inner wall surface of the cavity form an air flow channel, one end of the air flow channel is communicated with the accommodation cavity through the first opening; the deflection shell is connected with the front wall surface of the outer shell, the deflection shell is hollow formed deflection cavity, the deflection cavity is communicated with the other end of the air flow channel, the deflection shell is provided with a second opening, the second opening is located on the front side of the outer shell and the same as the direction of the first opening, the second opening is communicated with the deflection cavity. The application can solve the problem that the aerosol temperature of the existing aerosol fire sprinkler is too high to ignite the surrounding equipment components and aggravate the fire.

Description

Technical Field

[0001] This invention relates to the field of fire protection equipment technology, and in particular to an automatic fire sprinkler head. Background Technology

[0002] Fire sprinklers typically use a heat-sensitive wire to sense temperature. When the temperature reaches the ignition temperature (e.g., during a fire), the heat-sensitive wire connected to the fire cartridge ignites, igniting the cartridge and spraying out an aerosol capable of extinguishing the fire. However, in existing fire sprinklers, the aerosol is generally sprayed directly upwards after the cartridge ignites. The aerosol formed by the automatic ignition of the cartridge generates significant heat, remaining at a high temperature as it flows to the outlet. This can easily raise the temperature at the outlet, where numerous equipment components are often located. When the aerosol is sprayed, it immediately comes into contact with these components, causing them to overheat and potentially ignite, exacerbating the fire. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes an automatic fire sprinkler head.

[0004] The solution to the technical problem of this invention is:

[0005] An automatic fire sprinkler head includes:

[0006] The inner shell is hollow to form a receiving cavity for accommodating the drug core, and the inner shell is provided with a first opening that communicates with the receiving cavity;

[0007] The outer shell is hollow to form a cavity, and the inner shell is disposed in the cavity. An airflow channel is formed between the outer wall of the inner shell and the inner wall of the cavity. One end of the airflow channel is connected to the receiving cavity through the first opening.

[0008] A steering housing is connected to the front wall of the outer shell. The steering housing is hollow to form a steering cavity. The steering cavity is connected to the other end of the airflow channel. The steering housing has a second opening located on the front side of the outer shell and facing the same direction as the first opening. The second opening is connected to the steering cavity.

[0009] The present invention has at least the following beneficial effects: After the core propellant in the receiving cavity is ignited, it will spray out aerosol for fire extinguishing. The aerosol can enter the airflow channel from the first opening and flow along the airflow channel to the turning cavity. After being turned by the turning cavity, it is sprayed out from the second opening into the external fire space, thereby extinguishing the fire in the fire space. Because the turning cavity is provided, the spray outlet direction of the aerosol is changed. After the aerosol is sprayed out from the second opening, it needs to flow through the entire front wall of the shell first, and will not immediately come into contact with the external equipment components. During the process of the aerosol flowing through the front wall of the shell, the external air and the front wall of the shell play a certain cooling role for the aerosol. When the aerosol reaches the equipment component, the temperature has been reduced, thereby avoiding the situation where the equipment component catches fire due to contact with the high temperature aerosol, and preventing the fire from escalating.

[0010] As a further improvement to the above technical solution, the outer casing is cylindrical, and the automatic fire sprinkler head also includes a stop block. The stop block is connected to the front wall of the outer casing, and the hollow stop block forms a sag adjustment cavity. The sag adjustment cavity communicates with the steering cavity through the second opening. The stop block has a third opening, which faces the same direction as the first opening. The stop block allows the aerosol to spray downwards, preventing the equipment components located on the left and right sides of the automatic fire sprinkler head from being ignited by the high-temperature aerosol.

[0011] As a further improvement to the above technical solution, the automatic fire sprinkler head also includes a filter grid, which is connected to the inner wall of the adjusting cavity and located at the third opening. The filter grid can filter impurities mixed in the aerosol, preventing impurities in the aerosol from entering the fire space.

[0012] As a further improvement to the above technical solution, the automatic fire sprinkler head also includes a piezoelectric ignition part, which is disposed on the front wall of the outer shell and hollow to form an ignition chamber communicating with the receiving cavity. The piezoelectric ignition part is provided with a temperature sensing element, a first impact element, a second impact element, and an elastic element. The first impact element, the second impact element, and the elastic element are all disposed in the ignition chamber. The two ends of the elastic element are respectively connected to the first impact element and the second impact element. The second impact element is connected to the outer shell through the temperature sensing element.

[0013] The automatic ignition of the fuel core is achieved through a piezoelectric ignition unit. The working principle is simple, and compared with the use of thermal wires in traditional automatic fire sprinklers, it can avoid ignition failure caused by thermal wire breakage, thus improving the reliability of the automatic fire sprinkler.

[0014] As a further improvement to the above technical solution, the temperature sensing element is a metal temperature sensing sheet, which includes a first connecting piece and a second connecting piece. The first connecting piece is welded to the second connecting piece, and the first connecting piece is connected to the outer shell. The second collision element is connected to the second connecting piece. Triggering the piezoelectric ignition unit through the metal temperature sensing sheet has a simple working principle. Moreover, the metal temperature sensing sheet is not easily damaged, which is beneficial for transportation and storage.

[0015] As a further improvement to the above technical solution, the melting point temperatures of the first connecting piece and the second connecting piece are in the range of 90℃ to 100℃. Using a temperature value in the range of 90℃ to 100℃ as the ignition temperature value for the automatic fire sprinkler head ensures that the automatic fire sprinkler head will not be falsely triggered at room temperature. In the event of a fire, ignition will be triggered without the fire space reaching excessively high temperatures, allowing the automatic fire extinguishing function of the automatic fire sprinkler head to be more timely.

[0016] As a further improvement to the above technical solution, the automatic fire sprinkler head also includes a cooling element, which is filled within the airflow channel. The cooling element cools the aerosol flowing through the airflow channel, further reducing the temperature of the aerosol exiting the fire space.

[0017] As a further improvement to the above technical solution, the automatic fire sprinkler head also includes a first filter element, which is disposed within the airflow channel and located at the end of the airflow channel connected to the first opening. The first filter element can perform initial filtration of impurities in the aerosol, reducing the corrosion or melting of the cooling component, thereby ensuring the cooling quality of the cooling component.

[0018] As a further improvement to the above technical solution, the automatic fire sprinkler head also includes a second filter element. The second filter element is disposed within the airflow channel and located at the end where the airflow channel connects to the deflection cavity. Through the filtration of the second filter element, residual cooling components in the aerosol can be filtered, resulting in cleaner aerosol entering the deflection cavity.

[0019] As a further improvement to the above technical solution, the automatic fire sprinkler head also includes a powerful magnet and a strong adhesive. The strong adhesive covers the rear wall of the outer casing and has multiple through holes. The powerful magnet is disposed within the through holes and connected to the outer casing. The combined effect of the powerful magnet and the strong adhesive improves the stability of the automatic fire sprinkler head installation. Furthermore, the installation process is simple and convenient, allowing users to install it themselves. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly explained below. Obviously, the described drawings are only a part of the embodiments of the present invention, and not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of the automatic fire sprinkler head according to an embodiment of the present invention;

[0022] Figure 2 This is a front view of an automatic fire sprinkler head according to an embodiment of the present invention;

[0023] Figure 3 This is a left view of an automatic fire sprinkler head according to an embodiment of the present invention;

[0024] Figure 4 This is a bottom view of an automatic fire sprinkler head according to an embodiment of the present invention;

[0025] Figure 5 This is a rear view of an automatic fire sprinkler head according to an embodiment of the present invention;

[0026] Figure 6 This is an exploded structural diagram of an automatic fire sprinkler head according to an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the internal structure of the housing according to an embodiment of the present invention.

[0028] Reference numerals: 100, housing; 110, airflow channel; 120, boss structure; 200, steering housing; 210, steering cavity; 220, heat dissipation pad; 300, cover; 310, heat insulation layer; 400, stop block; 410, filter grid; 500, piezoelectric ignition part; 600, strong adhesive; 700, strong magnet; 800, inner shell; 810, screw seat; 820, core; 830, receiving cavity. Detailed Implementation

[0029] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0030] In the description of this invention, the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0031] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0032] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0033] Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the scope of protection of the present invention. The various technical features of the present invention can be combined interactively without contradicting each other.

[0034] Reference Figures 1 to 7 This invention provides an automatic fire sprinkler head that can solve the problem that the temperature of the aerosol sprayed by existing aerosol fire sprinklers is too high, which can ignite surrounding equipment components and exacerbate the fire.

[0035] The automatic fire sprinkler head of this invention includes an inner shell 800 and an outer shell. The inner shell 800 is hollow, forming a receiving cavity 830, and has a first opening that faces downward and communicates with the receiving cavity 830. The outer shell is hollow, forming a cavity, and the inner shell 800 is disposed within the cavity. An airflow channel 110 is formed between the outer wall of the inner shell 800 and the inner wall of the cavity, and the lower end of the airflow channel 110 communicates with the receiving cavity 830 through the first opening.

[0036] It is worth noting that the automatic fire sprinkler head in this embodiment also includes a deflector housing 200. The deflector housing 200 is disposed on the front side of the outer casing and connected to the front wall of the outer casing. The deflector housing 200 is located in the upper part of the outer casing, and its hollow structure forms a deflector cavity 210, which communicates with the upper end of the airflow channel 110. In this embodiment, the deflector housing 200 is also provided with a second opening. The second opening is disposed on the front side of the outer casing, located on the lower end face of the deflector housing 200, and faces downward.

[0037] Understandably, the receiving cavity 830 is used to receive the core 820. After the core 820 is ignited, it can release aerosols for extinguishing fire. The aerosols flow along the airflow channel 110 to the turning cavity 210, and after turning in the turning cavity 210, they are sprayed into the fire space through the second opening.

[0038] Understandably, due to the presence of the deflection chamber 210, the trajectory that the aerosol needs to travel to flow into the ignition space is longer than the trajectory that it travels directly through the airflow channel 110. This can cool the aerosol to a certain extent, thereby reducing the temperature of the aerosol when it is ejected.

[0039] Understandably, when the aerosol flows to the second opening and is ejected, the aerosol is located on the front side of the casing and flows from the top to the bottom of the casing, without immediately contacting the surrounding equipment components upon ejection.

[0040] For example, when equipment components are placed on the underside of the housing, the aerosol needs to flow across the entire front wall of the housing before reaching the equipment components. The front wall of the housing accelerates the cooling of the aerosol, and the aerosol also cools down after being sprayed. Therefore, when the aerosol reaches the equipment components, the temperature of the aerosol is no longer as high as when it was first sprayed, thus preventing the equipment components located below from being ignited by the high-temperature aerosol.

[0041] Understandably, because the aerosol is sprayed downwards, it will not directly spray onto the equipment components located on the upper side of the casing, thus ensuring that the equipment components located on the upper side of the casing will not be ignited by the high-temperature aerosol.

[0042] In this embodiment, an airflow channel 110 is provided on each of the left and right sides of the inner shell 800. After the aerosol is sprayed from the first opening, it flows along the two airflow channels 110 in two separate paths. It can be understood that when the aerosol enters the airflow channel 110 through the first opening, the spray velocity and spray pressure of the aerosol increase due to the smaller airflow cross-section, which shortens the time for the aerosol to flow out, thus helping to shorten the fire extinguishing time and increase the fire extinguishing range. Moreover, the two airflow channels 110 in this embodiment are symmetrically arranged, which can ensure that the outer shell is subjected to symmetrical impact force from the aerosol when it flows.

[0043] In this embodiment, the side wall of the inner shell 800 is an arc surface. This design allows the aerosol to flow more smoothly, reduces the obstruction of the aerosol gas flow by the side wall of the inner shell 800, and ensures the speed of aerosol injection.

[0044] In this embodiment, the outer shell is cylindrical, and the cavity is also cylindrical, that is, the inner wall surface of the cavity is also an arc surface, which can further make the flow of aerosol smoother, reduce the obstruction of the aerosol flow by the inner wall surface of the cavity, and ensure the speed of aerosol spraying.

[0045] In this embodiment, the automatic fire sprinkler head also includes a stop block 400, which is disposed on the front side of the housing and connected to the front wall of the housing. The stop block 400 is hollow to form a sag adjustment cavity, which communicates with the turning cavity 210 through a second opening. Furthermore, the stop block 400 is provided with a third opening, which is located on the lower side wall of the stop block 400 and faces downward.

[0046] It is understandable that the third opening is connected to the vertical adjustment chamber. The aerosol flowing from the second opening is adjusted to flow vertically downwards through the vertical adjustment chamber before flowing out through the third opening. This design ensures the aerosol flows downwards, preventing the aerosol flowing from the second opening from spraying onto the left and right sides of the automatic fire sprinkler head, thus avoiding the equipment components located on the left and right sides of the sprinkler head being exposed to high-temperature aerosols and igniting.

[0047] In some embodiments, the automatic fire sprinkler head further includes a filter grid 410, which is connected to the inner wall of the vertical adjustment cavity. The filter grid 410 is disposed at the third opening and covers the third opening. In this embodiment, the filter grid 410 has multiple grid plates extending vertically. It is understood that the aerosol sprayed from the third opening into the external fire space needs to pass through the filter grid 410. The filter grid 410 can filter impurities mixed in the aerosol, preventing impurities in the aerosol from entering the fire space. Moreover, the grid plates can further guide the flow of the aerosol, keeping the aerosol sprayed downwards.

[0048] In this embodiment, the baffle 400 is detachably connected to the front wall of the housing. The baffle 400 is connected to the housing by screws, and the user can periodically disassemble the baffle 400 and clean the filter grid 410 to prevent dust and other impurities from accumulating at the filter grid 410 and affecting the aerosol spraying.

[0049] To further reduce the temperature of the ejected aerosol, the automatic fire sprinkler head also includes a cooling element. In this embodiment, the cooling element is a cooling ball, which is filled and disposed within the airflow channel 110. It is understood that the cooling ball can cool the aerosol, and the aerosol can flow through the gaps between adjacent cooling balls. The placement of the cooling balls does not affect the flow velocity of the aerosol through the airflow channel 110.

[0050] Understandably, the cooling ball can be spherical magnesium carbonate. The cooling element can also be a chemically reactive refrigerant, such as ammonia or hydrocarbons.

[0051] In this embodiment, the automatic fire sprinkler head also includes a first filter element, which is disposed within the airflow channel 110 and located at the lower end of the airflow channel 110, i.e., the end connected to the first opening. It is understood that the aerosol sprayed after the core 820 is ignited may contain impurities, which can erode or melt the cooling ball. The first filter element can perform an initial filtration of impurities in the aerosol, reducing the erosion or melting of the cooling ball, thereby ensuring the cooling quality of the cooling ball.

[0052] In this embodiment, the automatic fire sprinkler head also includes a second filter element, which is disposed within the airflow channel 110 and located at the upper end of the airflow channel 110, i.e., the end connected to the turning cavity 210. It is understood that after the aerosol passes through the cooling ball, the cooling ball will melt to some extent, and the aerosol will contain residues of the cooling ball. The second filter element filters the aerosol, making the aerosol entering the turning cavity 210 cleaner.

[0053] In this embodiment, both the first and second filter elements are stainless steel wire balls, which can achieve the effect of filtering aerosol gas and also have a certain cooling effect.

[0054] In this embodiment, the automatic fire sprinkler head also includes a heat dissipation pad 220, which is disposed in the turning cavity 210. It can be an iron sheet or the like. It is located between the turning cavity 210 and the airflow channel 110 and is provided with flow holes for aerosol to flow through. The heat dissipation pad 220 can further cool the aerosol, allowing the aerosol to enter the turning cavity 210 at a lower temperature.

[0055] Understandably, traditional automatic fire sprinklers ignite the 820 fuel core through the self-ignition of a thermal wire. However, the thermal wire requires a high temperature to ignite, and the burning space needs to reach the temperature required for the thermal wire to ignite after a certain period of time. For automatic fire sprinklers, it is necessary to spray aerosol into the burning space in a timely manner to achieve the effect of automatic fire extinguishing. Using a thermal wire as the triggering ignition component is not conducive to the rapid extinguishing of fires.

[0056] In this embodiment, the automatic fire sprinkler head also includes a piezoelectric ignition part 500, which ignites the core 820 through the piezoelectric effect, and can ignite the core 820 at a low temperature.

[0057] The piezoelectric ignition part 500 is disposed on the front side of the housing and connected to the front wall of the housing. The piezoelectric ignition part 500 is hollow to form an ignition chamber, which is connected to the receiving cavity 830. The piezoelectric ignition part 500 is provided with a first impact member, a second impact member, a temperature sensing member, and an elastic member. The first impact member, the second impact member, and the elastic member are all disposed in the ignition chamber. One end of the elastic member is connected to the first impact member, and the other end is connected to the second impact member. The temperature sensing member is connected to the second impact member. The second impact member is fixed to the housing through the temperature sensing member, so that the elastic member is kept in an extended state.

[0058] In this embodiment, the elastic element is a spring that extends and retracts in the vertical direction.

[0059] When a certain temperature is reached, the temperature sensing element disconnects the connection between the outer shell and the second impactor. Under the action of the elastic element, the second impactor moves toward the first impactor and violently impacts the first impactor, generating a high-voltage current and producing a spark to ignite the core 820.

[0060] In some embodiments, the temperature sensing element is a temperature-sensing glass ball. When a certain temperature is reached, the temperature-sensing glass ball breaks, thereby breaking the connection between the second collision element and the outer shell. Under the action of the elastic element, the second collision element collides with the first collision element and generates sparks.

[0061] However, the heat-sensing glass bulb itself is fragile. Automatic fire sprinklers using heat-sensing glass bulbs as their sensing element are not conducive to transportation and storage. If a large number of automatic fire sprinklers using heat-sensing glass bulbs are placed together, and one bulb breaks due to impact, it will cause the sprinkler to spray high-temperature aerosol, which may then cause other bulbs to break. This could ignite the 820 cartridges in all the sprinklers placed together, resulting in irreparable damage. Therefore, automatic fire sprinklers using heat-sensing glass bulbs require enhanced packaging protection, such as adding protective cotton wrapping, which will significantly increase costs.

[0062] In this embodiment, the temperature sensing element is a metal temperature sensing sheet, which includes a first connecting piece and a second connecting piece. The first connecting piece and the second connecting piece are connected by welding. The first connecting piece is connected to the outer shell, while the second connecting piece is connected to the second impact member.

[0063] When the ignition space reaches a certain temperature, the weld point between the first connecting piece and the second connecting piece melts and separates from the second connecting piece, causing the second collision member to separate from the outer shell. Under the elastic action of the elastic member, the second collision member moves towards the direction of the first collision member, and a violent collision occurs between the second collision member and the first collision member, generating an electric spark that ignites the core 820.

[0064] In some embodiments, the melting point temperatures of the first connecting piece and the second connecting piece are in the range of 90°C to 100°C. It is understood that the melting point temperatures of the first connecting piece and the second connecting piece are determined by their materials. In this embodiment, the first connecting piece and the second connecting piece are made of fusible alloy, which has advantages such as high responsiveness and strong weld strength.

[0065] In this embodiment, the melting point temperature of the first connecting piece and the second connecting piece is 93°C.

[0066] Understandably, using 93℃ as the ignition temperature for automatic fire sprinklers is appropriate. The automatic fire sprinklers will not be accidentally triggered at room temperature. When a fire occurs, they will be triggered without the fire space reaching an excessively high temperature, allowing the automatic fire sprinklers to extinguish fires more promptly.

[0067] In some embodiments, multiple piezoelectric ignition units 500 are provided, and the multiple piezoelectric ignition units 500 are arranged on the front side of the housing. It can be understood that providing multiple piezoelectric ignition units 500 can provide a certain guarantee for the smooth ignition of the core 820, and prevent the automatic fire sprinkler head from failing to ignite the core 820 in time and perform automatic fire extinguishing due to the failure of the piezoelectric ignition unit 500.

[0068] In this embodiment, two piezoelectric ignition units 500 are provided. The two piezoelectric ignition units 500 serve as backups for each other to ensure that the fuse 820 can be ignited in time in case of fire. Of course, three, four, or other numbers of piezoelectric ignition units 500 can also be provided, and no specific limitation is made here.

[0069] In this embodiment, the outer casing includes a housing 100 and a cover 300, which together form a cavity. The housing 100 is detachably connected to the housing 100. When the cover 300 is separated from the housing 100, the cavity and the receiving cavity 830 are exposed, facilitating the addition of the drug core 820 into the receiving cavity 830 and the addition of a cooling element, a first filter element, and a second filter element into the airflow channel 110, thus further facilitating manufacturing and processing.

[0070] In this embodiment, the steering shell 200, shell 100, cover 300 and inner shell 800 are all made of bakelite material. Bakelite material has good heat resistance, which can improve the reliability of automatic fire sprinkler operation, prevent automatic fire sprinkler from spontaneously combusting due to high temperature, and at the same time reduce the impact of high temperature of aerosol on the surrounding devices of automatic fire sprinkler.

[0071] In this embodiment, the housing 100 and the steering housing 200 are integrally molded parts.

[0072] It is understood that the automatic fire sprinkler head in this embodiment can be installed in locations such as distribution boxes, switch cabinets, DC cabinets, battery compartments, engine compartments, charging piles, distribution cabinets, car engine compartments, battery compartments, computer rooms, and mobile energy storage cabinets.

[0073] In some embodiments, the front end face of the cover 300 is further provided with a heat insulation layer 310, which is also made of bakelite material. It is disposed at the rear end of the inner shell 800 and covers the rear end of the airflow channel 110. The rear end of the shell 100 is provided with a rearwardly protruding boss structure 120, which is circumferentially arranged. The front end face of the cover 300 is provided with a groove structure that matches the boss structure 120. When the shell 100 and the cover 300 are connected, the boss structure 120 is engaged in the groove structure, and the boss structure 120 can shield the heat insulation layer 310.

[0074] Understandably, the insulation layer 310 can reduce the high temperature in the airflow channel 110 from being transferred to the cover 300, thereby preventing the cover 300 from overheating and igniting components such as the distribution box used to install automatic fire sprinklers.

[0075] The automatic fire sprinkler in this embodiment also includes a powerful magnet 700, which is disposed on the rear wall of the housing and is used to fix the automatic fire sprinkler to the distribution box or other locations by magnetic force, making installation convenient and quick.

[0076] It is understood that the shape, size and number of the powerful magnets 700 are not specifically limited here. In this embodiment, three powerful magnets 700 are provided, and the three powerful magnets 700 are evenly arranged around the central circumference of the outer shell.

[0077] In this embodiment, the powerful magnet 700 is installed on the cover 300 by screws. A screw hole is provided on the rear end face of the inner shell 800 for connecting the powerful magnet 700, the cover 300 and the heat insulation layer 310. The screw is threadedly connected to the screw hole to fix them, thereby realizing the detachable connection of the powerful magnet 700, the cover 300, the heat insulation layer 310 and the shell 100, reducing the number of connecting parts and making it more convenient for production and installation.

[0078] In some other embodiments, to facilitate the setting of screw holes, a screw seat 810 is provided at the airflow channel 110, and the screw hole is set on the screw seat 810. The strong magnet 700, the cover 300, and the heat insulation layer 310 are fixed on the screw seat 810 by screws, and the housing 100, the cover 300, the heat insulation layer 310 and the strong magnet 700 are directly locked together.

[0079] In some embodiments, the screw seat 810 is disposed in the middle of the airflow channel 110. However, this disposal causes the screw seat 810 to form an obstruction within the airflow channel 110. The placement of the screw seat 810 affects the flow of aerosol within the airflow channel 110 and reduces the aerosol injection speed to some extent.

[0080] In this embodiment, the screw seat 810 is connected to the outer wall of the inner shell 800 or the inner wall of the shell 100 to reduce the influence of the screw seat 810 on the aerosol flow rate. Moreover, when the screw is inserted into the screw seat 810, the screw seat 810 reduces the temperature of the aerosol to a certain extent when the aerosol flows in the airflow channel 110, further preventing the aerosol sprayed into the fire space from igniting the surrounding equipment components.

[0081] It is understandable that the screws used to connect the housing 100, the cover 300, the heat insulation layer 310 and the strong magnet 700 are countersunk screws. After installation, the end of the countersunk screw can be recessed into the strong magnet 700, rather than protruding from the rear end face of the strong magnet 700, which is more conducive to the strong magnet 700 being magnetically fixed to a flat surface such as the outer wall of a distribution box.

[0082] In this embodiment, the automatic fire sprinkler head also includes a strong adhesive 600, which covers the rear wall surface of the housing. The strong adhesive 600 has multiple through holes, and a strong magnet 700 is located within these through holes. The rear surface of the strong magnet 700 is flush with the rear surface of the strong adhesive 600. It is understood that the strong adhesive 600 can improve the installation stability of the automatic fire sprinkler head and components such as the electrical distribution box.

[0083] It is understood that before the automatic fire sprinkler head of this embodiment is installed, the back surface of the strong adhesive 600 is covered with a layer of release paper to protect the strong adhesive 600. When the construction personnel install the automatic fire sprinkler head, they can peel off the release paper and use the strong adhesive 600 to stably stick the automatic fire sprinkler head to the distribution box and other locations.

[0084] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. An automatic fire sprinkler head, characterized in that, include: The inner shell is hollow to form a receiving cavity for accommodating the drug core, and the inner shell is provided with a first opening that communicates with the receiving cavity; The outer shell is hollow to form a cavity, and the inner shell is disposed in the cavity. An airflow channel is formed between the outer wall of the inner shell and the inner wall of the cavity. One end of the airflow channel is connected to the receiving cavity through the first opening. The outer shell is cylindrical. A steering housing is connected to the front wall of the outer shell. The steering housing is hollow to form a steering cavity, which is connected to the other end of the airflow channel. The steering housing has a second opening located on the front side of the outer shell and facing the same direction as the first opening. The second opening is connected to the steering cavity. A stop block is connected to the front wall of the outer casing. The stop block is hollow to form a sag adjustment cavity. The sag adjustment cavity is connected to the steering cavity through the second opening. The stop block is provided with a third opening, which faces the same direction as the first opening. The piezoelectric ignition part is disposed on the front wall of the outer shell and is hollow to form an ignition chamber communicating with the receiving cavity. The piezoelectric ignition part is provided with a temperature sensing element, a first impact element, a second impact element and an elastic element. The first impact element, the second impact element and the elastic element are all disposed in the ignition chamber. The two ends of the elastic element are respectively connected to the first impact element and the second impact element. The second impact element is connected to the outer shell through the temperature sensing element. The temperature sensing element is a metal temperature sensing sheet, which includes a first connecting piece and a second connecting piece. The first connecting piece is welded to the second connecting piece, the first connecting piece is connected to the outer shell, and the second collision element is connected to the second connecting piece.

2. The automatic fire sprinkler head according to claim 1, characterized in that, The automatic fire sprinkler head also includes a filter grid, which is connected to the inner wall of the adjustable chamber and located at the third opening.

3. The automatic fire sprinkler head according to claim 1, characterized in that, The melting point temperature of the first connecting piece and the second connecting piece is 93°C.

4. The automatic fire sprinkler head according to claim 1, characterized in that, The automatic fire sprinkler head also includes a cooling element, which is filled in the airflow channel.

5. The automatic fire sprinkler head according to claim 4, characterized in that, The automatic fire sprinkler head also includes a first filter element, which is disposed in the airflow channel and located at the end of the airflow channel that connects to the first opening.

6. The automatic fire sprinkler head according to claim 4, characterized in that, The automatic fire sprinkler head also includes a second filter element, which is disposed in the airflow channel and located at the end of the airflow channel connected to the turning cavity.

7. The automatic fire sprinkler head according to claim 1, characterized in that, The automatic fire sprinkler head also includes a strong magnet and a strong adhesive. The strong adhesive covers the rear wall of the housing and has multiple through holes. The strong magnet is located in the through holes and connected to the housing.

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