Hidden fire sprinkler with high sensitivity

Abstract

The invention relates to the technical field of fire safety, and discloses a high-sensitivity hidden fire sprinkler which comprises a group of first mounting holes and a plurality of groups of second mounting holes, the first mounting holes and the second mounting holes are formed in a suspended ceiling, the first mounting holes are formed in the indoor center, and the second mounting holes are formed above a flammable point; a group of hidden fire sprinkler assemblies are mounted in the first mounting hole, a thermosensitive discharge assembly is mounted in the second mounting hole, and the thermosensitive discharge assembly is connected with the hidden fire sprinkler assemblies through wires; through the thermoelectric power generation principle (Seebeck effect), when the temperature of a fire source changes, voltage and current can be rapidly generated, a system is triggered to be started, and the response time is shorter than that of a traditional thermosensitive glass plunger; core advantages of high sensitivity, hidden installation, accurate fire extinguishing and reusability of the fire-fighting nozzle are achieved, attractiveness and reliability are both considered, and the fire-fighting nozzle is an important technical progress in the field of fire-fighting safety.

Description

Technical Field

[0001] The invention relates to the technical field of fire safety, in particular to a highly sensitive hidden fire sprinkler. Background Art

[0002] With the development of society and the continuous improvement of people's living standards, fire safety awareness has become deeply rooted in people's minds and has become an indispensable consideration in modern architectural design. Against this backdrop, the popularity of various fire-fighting equipment continues to rise. Among them, fire sprinklers, due to their simple structure, easy installation, and high fire-extinguishing efficiency, have become one of the most widely used automatic fire-extinguishing devices in various building fire protection systems.

[0003] However, while meeting basic safety needs, contemporary consumers are also increasingly demanding aesthetics for their living and working environments. This is particularly true in high-end commercial complexes, boutique hotels, and luxury residences, where traditional fire sprinkler installation methods often clash with carefully designed interior décor. When sprinklers are mounted protruding from the ceiling or wall, their mechanical appearance not only disrupts the overall aesthetic of the space but can also affect the visual impact of decorative elements like lighting design and ceiling molding, thereby diminishing the quality and comfort of the environment. Summary of the Invention

[0004] The object of the present invention is to provide a highly sensitive concealed fire sprinkler to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A highly sensitive hidden fire sprinkler comprises a set of first mounting holes and multiple sets of second mounting holes arranged in a suspended ceiling, wherein the first mounting holes are arranged at the center of the room, and the multiple sets of second mounting holes are arranged above flammable points;

[0007] A group of hidden fire sprinkler components is installed in the first installation hole, and a thermal discharge component is installed in the second installation hole. The thermal discharge component is connected to the hidden fire sprinkler component through a wire;

[0008] The concealed fire sprinkler assembly includes a fixed cylinder, a positioning plug is installed at the bottom of the fixed cylinder, the positioning plug is slidably connected to the first mounting hole, the top of the fixed cylinder is fixedly connected to the water tank, the bottom of the water tank is fixedly connected to a sealing block, the sealing block is slidably connected to the sliding cylinder, the bottom of the sliding cylinder is fixedly connected to an internal threaded cylinder, the internal threaded cylinder is internally threaded with a mounting screw cylinder, the bottom of the mounting screw cylinder is fixedly connected to a sealing plate, a water outlet is provided in the sealing plate, and a splash plate fixedly connected to the sealing plate is provided below the water outlet, a fixed stop is fixedly connected to the outer wall of the internal threaded cylinder, the outer wall of the fixed cylinder is fixedly connected to a piston cylinder, a sliding piston is slidably connected in the piston cylinder, the sliding piston is fixedly connected to a connecting rod, the connecting rod is fixedly connected to a telescopic stop, the telescopic stop and the fixed stop cooperate with each other, the water tank side is fixedly connected to a connector, and a second spring is installed on the side of the sliding piston close to the piston cylinder;

[0009] A sealing plunger is fixedly connected to the water tank, and the bottom of the sealing plunger cooperates with the water outlet to seal the water outlet;

[0010] A protective tube is fixedly connected to one end of the piston cylinder away from the fixed cylinder, a nickel-titanium alloy memory wire with a diameter of 0.5 mm is installed in the protective tube, a flow restrictor is fixedly connected to the protective tube, and the nickel-titanium alloy memory wire is connected to the flow restrictor;

[0011] The thermal discharge assembly includes a bismuth telluride thermoelectric block installed in the second installation hole, and the bismuth telluride thermoelectric block is connected to the current limiter through a wire.

[0012] As a further solution of the present invention: a sealing ring is installed at the connection between the sealing plunger and the water outlet.

[0013] As a further solution of the present invention: a first screw seat is fixedly connected to the bottom of the fixing cylinder.

[0014] As a further solution of the present invention: a protective cover is slidably connected to the bottom of the positioning insert.

[0015] As a further solution of the present invention: a limit block is fixedly connected to the inner wall of the water tank, and the limit block cooperates with the sliding cylinder to limit the sliding cylinder.

[0016] As a further solution of the present invention: the fixed stopper is set at an oblique angle on one side close to the sealing block, the other side of the fixed stopper is set at a right angle, and the telescopic stopper is set in a conical shape on one end away from the connecting rod.

[0017] As a further solution of the present invention: a plurality of mounting tubes are fixedly connected to the current limiter, a first threaded connection seat is fixedly connected to the mounting tube, a conductive contact is fixedly installed in the first threaded connection seat, and the conductive contact is connected to the current limiter in parallel through a conductive wire.

[0018] As a further solution of the present invention: the bismuth telluride thermoelectric block is fixedly connected to an insulating mounting seat, the insulating mounting seat is fixedly connected to a second screw seat, the bismuth telluride thermoelectric block is fixedly connected to a second threaded connection seat through the insulating mounting seat, and a conductive contact is also fixedly installed in the second threaded connection seat.

[0019] As a further solution of the present invention: both ends of the wire are fixedly connected with threaded terminals, the threaded terminals are threadedly connected to the first threaded connection seat and the second threaded connection seat, and conductive contacts are fixedly connected inside the threaded terminals, and the conductive contacts cooperate with each other.

[0020] As a further solution of the present invention: a baffle is fixedly connected to the bottom of the internal threaded cylinder, and a first spring is installed between the bottom of the baffle and the positioning insert.

[0021] As a further solution of the present invention: a water guide groove is provided in the sealing plunger, a water inlet hole connected to the water tank is provided at the top of the water guide groove, a sealing plug is provided at the bottom of the water guide groove, a fixing seat is fixedly connected to the bottom of the sealing plunger, and a heat-sensitive glass plunger is installed between the fixing seat and the sealing plug.

[0022] Compared with the existing technology, the present invention has the following advantages: It uses the principle of thermoelectric power generation (Seebeck effect) to quickly generate voltage and current when the fire source produces a temperature change, triggering the system to start. The response time is shorter than that of traditional thermosensitive glass plungers. There is no need to wait for the temperature to be transferred to the nozzle, and the nozzle mechanical structure is directly unlocked, avoiding the response lag caused by heat conduction delay of traditional nozzles.

[0023] At the same time, the present invention is completely embedded in the ceiling during installation: the nozzle assembly is usually retracted in the ceiling, with only the protective cover exposed (which can be painted with the same color as the wall), which does not affect the aesthetics of the interior decoration. Through the mechanical linkage of the fixed block and the telescopic block, the splash plate will be extended only when the fire is extinguished, realizing "traceless" installation;

[0024] The present invention also uses distributed thermal discharge components, which are arranged directly above the ignition point. The bismuth telluride thermoelectric block directly senses the local high temperature, avoiding the false triggering of traditional nozzles due to global temperature rise, and ensuring that the fire source is covered without blind spots.

[0025] The present invention uses the temperature difference of the fire source to generate self-generated electricity, does not require an external power supply, and is suitable for power outage environments. The nickel-titanium alloy memory wire and bismuth telluride thermoelectric block are both solid-state devices, and there is no risk of chemical leakage.

[0026] This invention achieves the core advantages of fire sprinklers, such as high sensitivity, concealed installation, precise fire extinguishing, and reusability, through the innovative combination of bismuth telluride thermoelectric block temperature difference power generation and nickel-titanium alloy memory wire drive, while taking into account both aesthetics and reliability. It is an important technological advancement in the field of fire safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic structural diagram of a highly sensitive hidden fire sprinkler in the present invention.

[0028] Figure 2 The figure is a schematic diagram showing the positions of the first mounting hole and the second mounting hole in a high-sensitivity hidden fire sprinkler according to the present invention.

[0029] Figure 3 This is a schematic diagram of the effect of a highly sensitive hidden fire sprinkler in the present invention.

[0030] Figure 4 This is a structural diagram showing a highly sensitive hidden fire sprinkler in the present invention.

[0031] Figure 5 The figure is a structural schematic diagram of a hidden fire sprinkler assembly in a high-sensitivity hidden fire sprinkler in the present invention.

[0032] Figure 6 The figure is a schematic structural diagram of a thermal discharge component in a highly sensitive hidden fire sprinkler according to the present invention.

[0033] Figure 7 The figure is a schematic diagram of the structure of the wires in a highly sensitive hidden fire sprinkler according to the present invention.

[0034] Figure 8 The figure is a schematic diagram of the internal structure of a fixed cylinder in a high-sensitivity hidden fire sprinkler in the present invention.

[0035] Figure 9 The figure is a schematic cross-sectional view of a fixed tube in a high-sensitivity hidden fire sprinkler according to the present invention.

[0036] Figure 10 The figure is a schematic diagram of the cross-sectional structure of a highly sensitive hidden fire sprinkler in the present invention.

[0037] Figure 11 for Figure 10 A partial enlarged view of point A.

[0038] In the figure: 1-first mounting hole, 2-second mounting hole, 3-fixing cylinder, 4-positioning insert, 5-first screw seat, 6-water tank, 7-sealing block, 8-sliding cylinder, 9-limit block, 10-internal thread cylinder, 11-mounting screw cylinder, 12-sealing plate, 13-water outlet, 14-splash plate, 15-sealing plunger, 16-sealing ring, 17-water guide groove, 18-water inlet hole, 19-sealing plug, 20-fixing seat, 21-thermosensitive glass plunger, 22-baffle, 23-first spring, 24-connector, 25-fixed block Block, 26-piston cylinder, 27-sliding piston, 28-connecting rod, 29-telescopic stopper, 30-second spring, 31-protective tube, 32-nickel-titanium alloy memory wire, 33-current limiter, 34-mounting cylinder, 35-conductive wire, 36-first threaded connection seat, 37-conductive contact, 38-bismuth telluride thermoelectric block, 39-insulating mounting seat, 40-second screw seat, 41-second threaded connection seat, 42-wire, 43-threaded terminal, 44-protective cover, 45-hidden fire sprinkler assembly, 46-thermal discharge assembly. DETAILED DESCRIPTION

[0039] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0040] In one embodiment of the present invention, see Figures 1 to 11 A highly sensitive hidden fire sprinkler comprises a set of first mounting holes 1 and a plurality of second mounting holes 2 arranged in a suspended ceiling, wherein the first mounting holes 1 are arranged at the center of the room, and the plurality of second mounting holes 2 are arranged above a flammable point;

[0041] A set of hidden fire sprinkler head assemblies 45 is installed in the first mounting hole 1, and a thermal discharge assembly 46 is installed in the second mounting hole 2. The thermal discharge assembly 46 is connected to the hidden fire sprinkler head assembly 45 via a wire 42;

[0042] The hidden fire sprinkler assembly 45 includes a fixed cylinder 3, a positioning insert 4 is installed at the bottom of the fixed cylinder 3, the positioning insert 4 is slidably connected to the first mounting hole 1, the top of the fixed cylinder 3 is fixedly connected to the water tank 6, the bottom of the water tank 6 is fixedly connected to the sealing block 7, the sealing block 7 is slidably connected to the sliding cylinder 8, the bottom of the sliding cylinder 8 is fixedly connected to the internal threaded cylinder 10, the internal threaded cylinder 10 is internally threaded with the mounting screw cylinder 11, the bottom of the mounting screw cylinder 11 is fixedly connected to the sealing plate 12, the sealing plate 12 is provided with a water outlet 13, and a screw fixedly connected to the sealing plate 12 is provided below the water outlet 13. The splash plate 14 and the outer wall of the internal threaded cylinder 10 are fixedly connected to a fixed stopper 25, the outer wall of the fixed cylinder 3 is fixedly connected to a piston cylinder 26, a sliding piston 27 is slidably connected to the piston cylinder 26, a connecting rod 28 is fixedly connected to the sliding piston 27, a telescopic stopper 29 is fixedly connected to the connecting rod 28, the telescopic stopper 29 cooperates with the fixed stopper 25, a connector 24 is fixedly connected to one side of the water tank 6, a second spring 30 is installed on the side of the sliding piston 27 close to the piston cylinder 26, and the connecting rod 28 and the telescopic stopper 29 are made of a metal material with strong conductivity;

[0043] A sealing plunger 15 is fixedly connected to the water tank 6, and the bottom of the sealing plunger 15 cooperates with the water outlet 13 to seal the water outlet 13;

[0044] A protective tube 31 is fixedly connected to the end of the piston cylinder 26 away from the fixed cylinder 3. A nickel-titanium alloy memory wire 32 with a diameter of 0.5 mm is installed in the protective tube 31. A flow restrictor 33 is fixedly connected to the protective tube 31, and the nickel-titanium alloy memory wire 32 is connected to the flow restrictor 33.

[0045] The thermal discharge assembly 46 includes a bismuth telluride thermoelectric block 38 mounted in the second mounting hole 2 , and the bismuth telluride thermoelectric block 38 is connected to the current limiter 33 via a wire 42 ;

[0046] During use, the present invention first opens a second mounting hole 2 in the ceiling above the flammable material according to the location of the flammable material. At the same time, a first mounting hole 1 is opened at the center of multiple groups of second mounting holes 2. Then, the hidden fire sprinkler assembly 45 is installed in the first mounting hole 1. At the same time, multiple groups of thermal discharge assemblies 46 are installed in multiple groups of second mounting holes 2. Then, the current limiter 33 is connected to the bismuth telluride thermoelectric block 38 via a wire 42.

[0047] During the installation of the equipment, the positioning insert 4 is first inserted into the first mounting hole 1, so that the first mounting hole 1 is protected by the positioning insert 4, thereby avoiding and fixing the fixing cylinder 3. At this time, the sealing plunger 15 is inserted into the water outlet 13, thereby sealing the water outlet 13. At the same time, the fixed stopper 25 is located above the telescopic stopper 29, and then the fixed stopper 25 is located at the telescopic stopper 29 to limit the internal threaded cylinder 10. The internal threaded cylinder 10 drives the sealing plate 12 and the splash plate 14 to shrink synchronously into the positioning insert 4, thereby realizing the hidden design of the sealing plate 12 and the splash plate 14. At this time, one end of the nickel-titanium alloy memory wire 32 is connected to the bismuth telluride thermoelectric block 38 through the wire 42, and the other end is in contact with the fire protection pipe through the connecting rod 28 and the telescopic stopper 29;

[0048] When the combustible material burns, the hot air generated by the combustion rises, rapidly heating the bottom of the bismuth telluride thermoelectric block 38 above the combustible material. A temperature difference is generated on both sides of the bismuth telluride thermoelectric block 38. The direction of charge movement is consistent with the direction of heat transfer, that is, from the high-temperature end to the low-temperature end. The charge in the bismuth telluride thermoelectric block 38 converges at the lower temperature end, forming a negative electrode. At this point, the fire protection pipe is connected to the ground and can be considered the positive electrode, thus forming a loop at both ends of the nickel-titanium alloy memory wire 32.

[0049] At this point, the test shows that at a temperature difference of 50°C and an area of ​​10 cm², the typical output of the bismuth telluride thermoelectric module is:

[0050] Open circuit voltage: about 2.5V;

[0051] Maximum current: about 1.2A short circuit or 0.6A matched load;

[0052] The current generated at this time enters the current limiter 33 through the wire 42, and the current input by the wire 42 is further limited by the current limiter 33. When the current of the wire 42 is too large, that is, when the temperature of the bismuth telluride thermoelectric block 38 changes rapidly, it can be determined that the flammable material below the bismuth telluride thermoelectric block 38 has burned. At this time, the charge passes through the current limiter 33 and enters the nickel-titanium alloy memory wire 32. At this time, the nickel-titanium alloy memory wire 32 is energized and contracts, generating a tensile force of 20 to 30N. At this time, the tensile force acts on the connecting rod 28, thereby driving the telescopic block 29 to move away from the fixed block 25 and compressing the second spring 30.

[0053] At this time, the fixed stopper 25 loses its limit, and the pressure generated by the water pressure acts on the sealing plate 12. The sealing plate 12 drives the mounting screw barrel 11, the internal threaded barrel 10 and the sliding barrel 8 to slide out of the water tank 6 and extend out of the fixed barrel 3. In the process of the sealing plate 12 extending downward, the sealing plunger 15 is pulled out from the water outlet 13, and the water outlet 13 is opened. At this time, high-pressure water flows out from the water outlet 13 and impacts the splash plate 14. Under the action of the splash plate 14, the water drips in an umbrella shape, thereby extinguishing the fire source.

[0054] In one embodiment of this invention, see Figures 5 to 11 The bottom of the internally threaded barrel 10 is fixedly connected to a baffle 22, and a first spring 23 is installed between the bottom of the baffle 22 and the positioning insert 4. The present invention elastically lifts the baffle 22 through the setting of the first spring 23, and then when the water pressure impact drives the internally threaded barrel 10 to extend, the internally threaded barrel 10 drives the baffle 22 to press down synchronously, thereby compressing the first spring 23;

[0055] When the fire is extinguished, the ignition point temperature decreases. At this time, the temperature difference on both sides of the bismuth telluride thermoelectric block 38 decreases, and no current is generated. After the nickel-titanium alloy memory wire 32 drives the wire to cool, it returns to its original length. At this time, the second spring 30 loses its compression force, thereby releasing elastic potential energy, thereby pushing the telescopic block 29 to reset. When the fire is extinguished and the fire pipe is temporarily closed, the water pressure in the fire pipe disappears, and the sealing plate 12 loses its thrust. At this time, the first spring 23 releases elastic potential energy, thereby pushing the internal threaded barrel 10 to rise and reset; thereby realizing multiple uses of the equipment.

[0056] In one embodiment of this invention, see Figures 5 to 11 , the fixed stopper 25 is set at an oblique angle on one side close to the sealing block 7, the other side of the fixed stopper 25 is set at a right angle, and the telescopic stopper 29 is set at a conical end away from the connecting rod 28;

[0057] When the device of the present invention is in the closed state, the fixed stopper 25 is located at the bottom of the telescopic stopper 29. At this time, the right-angled surface of the fixed stopper 25 contacts the telescopic stopper 29. At this time, the two sets of right-angled surfaces contact each other, thereby realizing the limit clamping between the fixed stopper 25 and the telescopic stopper 29. Then, when the fire extinguishing is completed, the fixed stopper 25 is located below the telescopic stopper 29. At this time, the conical surface of the telescopic stopper 29 contacts the oblique angled surface of the fixed stopper 25, thereby converting the elastic potential energy of the first spring 23 into a horizontal driving force acting on the telescopic stopper 29, thereby driving the telescopic stopper 29 to retract and reset, thereby making the fixed stopper 25 pass over the telescopic stopper 29 so that the two sets of right-angled surfaces contact each other again, thereby completing the automatic reset of the device.

[0058] In one embodiment of this invention, see Figures 5 to 11A sealing ring 16 is installed at the connection between the sealing plunger 15 and the water outlet 13. The present invention seals the water outlet 13 and the sealing plunger 15 through the setting of the sealing ring 16, thereby avoiding water leakage caused by long-term use.

[0059] In one embodiment of the present invention, see Figures 5 to 11 The bottom of the fixing tube 3 is fixedly connected with a first screw seat 5 . The present invention fixes the fixing tube 3 into the first mounting hole 1 through the provision of the first screw seat 5 .

[0060] In one embodiment of this invention, see Figures 5 to 11 The bottom of the positioning insert 4 is slidably connected to a protective cover 44. The present invention covers the first mounting hole 1 by setting the protective cover 44, and during the decoration process, the bottom of the protective cover 44 can be painted with wall paint consistent with the indoor wall to avoid visual spots caused by color difference.

[0061] In one embodiment of the present invention, see Figures 5 to 11 A limit stopper 9 is fixedly connected to the inner wall of the water tank 6, and the limit stopper 9 cooperates with the sliding cylinder 8 to limit the sliding cylinder 8. The present invention limits the top of the sliding cylinder 8 by cooperating with the limit stopper 9 and the sliding cylinder 8, thereby limiting the shortest contraction distance between the sliding cylinder 8 and the water tank 6, thereby preventing the sliding cylinder 8 from contracting to the top of the water tank 6 and affecting the normal use of the equipment.

[0062] In one embodiment of this invention, see Figures 5 to 11 , the current limiter 33 is fixedly connected to multiple groups of mounting tubes 34, the mounting tube 34 is fixedly connected to a first threaded connection seat 36, the first threaded connection seat 36 is fixedly installed with a conductive contact 37, the conductive contact 37 is connected in parallel to the current limiter 33 through a conductive wire 35, the bismuth telluride thermoelectric block 38 is fixedly connected to an insulating mounting seat 39, the insulating mounting seat 39 is fixedly connected to a second screw seat 40, the bismuth telluride thermoelectric block 38 is fixedly connected to a second threaded connection seat 41 through the insulating mounting seat 39, the second threaded connection seat 41 is also fixedly installed with a conductive contact 37, the two ends of the wire 42 are fixedly connected to a threaded terminal 43, the threaded terminal 43 is threadedly connected to the first threaded connection seat 36 and the second threaded connection seat 41, and the conductive contact 37 is fixedly connected to the threaded terminal 43, and the conductive contacts 37 cooperate with each other;

[0063] The present invention first fixes the insulating mounting seat 39 and the bismuth telluride thermoelectric block 38 to the second mounting hole 2 by passing a screw through the second screw seat 40, and then threadedly connects the first threaded connection seat 36 and the second threaded connection seat 41 through the threaded terminal 43 to achieve a stable connection of the wire 42. After the wire 42 is connected, the connection between the current limiter 33 and the bismuth telluride thermoelectric block 38 is achieved through the mutual cooperation of the conductive contacts 37.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A highly sensitive hidden fire sprinkler, comprising a set of first mounting holes and a plurality of second mounting holes arranged in a suspended ceiling, characterized in that: The first mounting hole is arranged at the center of the room, and the plurality of second mounting holes are arranged above the flammable points; A group of hidden fire sprinkler components is installed in the first installation hole, and a thermal discharge component is installed in the second installation hole. The thermal discharge component is connected to the hidden fire sprinkler component through a wire; The concealed fire sprinkler assembly includes a fixed cylinder, a positioning plug is installed at the bottom of the fixed cylinder, the positioning plug is slidably connected to the first mounting hole, the top of the fixed cylinder is fixedly connected to the water tank, the bottom of the water tank is fixedly connected to a sealing block, the sealing block is slidably connected to the sliding cylinder, the bottom of the sliding cylinder is fixedly connected to an internal threaded cylinder, the internal threaded cylinder is internally threaded with a mounting screw cylinder, the bottom of the mounting screw cylinder is fixedly connected to a sealing plate, a water outlet is provided in the sealing plate, and a splash plate fixedly connected to the sealing plate is provided below the water outlet, a fixed stop is fixedly connected to the outer wall of the internal threaded cylinder, the outer wall of the fixed cylinder is fixedly connected to a piston cylinder, a sliding piston is slidably connected in the piston cylinder, the sliding piston is fixedly connected to a connecting rod, the connecting rod is fixedly connected to a telescopic stop, the telescopic stop and the fixed stop cooperate with each other, the water tank side is fixedly connected to a connector, and a second spring is installed on the side of the sliding piston close to the piston cylinder; A sealing plunger is fixedly connected to the water tank, and the bottom of the sealing plunger cooperates with the water outlet to seal the water outlet; A protective tube is fixedly connected to one end of the piston cylinder away from the fixed cylinder, a nickel-titanium alloy memory wire with a diameter of 0.5 mm is installed in the protective tube, a flow restrictor is fixedly connected to the protective tube, and the nickel-titanium alloy memory wire is connected to the flow restrictor; The thermal discharge assembly includes a bismuth telluride thermoelectric block installed in the second installation hole, and the bismuth telluride thermoelectric block is connected to the current limiter through a wire.

2. A highly sensitive hidden fire sprinkler according to claim 1, characterized in that: The bottom of the fixing cylinder is fixedly connected with a first screw seat.

3. A highly sensitive hidden fire sprinkler according to claim 1, characterized in that: A limit block is fixedly connected to the inner wall of the water tank, and the limit block cooperates with the sliding cylinder to limit the sliding cylinder.

4. A highly sensitive hidden fire sprinkler according to claim 1, characterized in that: The fixed stopper is arranged at an oblique angle on one side close to the sealing block, and at a right angle on the other side. The telescopic stopper is arranged at a conical shape on one end away from the connecting rod.

5. The highly sensitive hidden fire sprinkler according to claim 1, characterized in that: The current limiter is fixedly connected to a plurality of mounting tubes, the mounting tubes are fixedly connected to a first threaded connection seat, a conductive contact is fixedly installed in the first threaded connection seat, and the conductive contact is connected to the current limiter in parallel through a conductive wire.

6. A highly sensitive hidden fire sprinkler according to claim 5, characterized in that: The bismuth telluride thermoelectric block is fixedly connected to an insulating mounting seat, which is fixedly connected to a second screw seat. The bismuth telluride thermoelectric block is fixedly connected to a second threaded connection seat through the insulating mounting seat, and a conductive contact is also fixedly installed in the second threaded connection seat.

7. A highly sensitive hidden fire sprinkler according to claim 6, characterized in that: The two ends of the wire are fixedly connected with threaded connectors, which are threadedly connected to the first threaded connection seat and the second threaded connection seat. Conductive contacts are fixedly connected inside the threaded connectors, and the conductive contacts cooperate with each other.

8. The highly sensitive hidden fire sprinkler according to claim 1, characterized in that: The bottom of the internal threaded cylinder is fixedly connected with a baffle, and a first spring is installed between the bottom of the baffle and the positioning insert.

9. The highly sensitive hidden fire sprinkler according to claim 1, characterized in that: A water guide groove is provided in the sealing plunger, a water inlet hole connected to the water tank is provided at the top of the water guide groove, a sealing plug is provided at the bottom of the water guide groove, a fixing seat is fixedly connected to the bottom of the sealing plunger, and a heat-sensitive glass plunger is installed between the fixing seat and the sealing plug.

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