Detonating device of temperature-sensing thermal power generation fire extinguisher

Abstract

The invention relates to the technical field of automatic fire fighting, and particularly discloses a temperature-sensing thermal power generation fire extinguisher detonating device which comprises a shell assembly and a triggering assembly, the triggering assembly comprises a capacitor, a thermoelectric power generation piece, a phase change material, a heat conducting piece and a temperature control switch, the heat conducting piece is arranged at the open end of the shell assembly, and the phase change material is arranged in the shell assembly; the thermoelectric power generation sheet is located between the heat-conducting sheet and the phase-change material and makes contact with the heat-conducting sheet and the phase-change material. The temperature control switch is installed on the heat-conducting sheet. When the starting temperature difference of the thermoelectric power generation sheet is reached, the thermoelectric power generation sheet generates voltage and stores the generated current in the capacitor, and when the temperature of the heat-conducting sheet continues to rise, the temperature control switch is closed, the current stored in the capacitor in advance is released to detonate an explosion device in the fire extinguisher, so that jet fire fighting of the fire extinguisher is realized; the triggering condition is only influenced by the environment temperature, false triggering caused by the change of the magnetic field is avoided, the accuracy is higher, and the timeliness is better.

Description

Technical Field

[0001] The invention relates to the technical field of automatic fire fighting, and in particular to an ignition device for a temperature-sensitive thermal power generation fire extinguisher. Background Art

[0002] The automatic fire extinguishing device is mainly composed of four parts: detector, fire extinguisher, digital temperature control alarm and communication module. It can remotely monitor and control the real-time temperature changes, alarm status and fire extinguisher information in the fire protection area through the digital communication module in the device. It can not only remotely monitor the various states of the automatic fire extinguishing device, but also grasp the real-time changes in the fire protection area. When a fire occurs, it can minimize the loss of life and property. It is widely used in life, production and other scenes. The core of the automatic fire extinguishing device is that it needs to be triggered by the outside world to start. The triggering signals include but are not limited to electrical signals and temperature signals. The timeliness and accuracy of the triggering are particularly important for fire protection.

[0003] In the related art, the trigger source of the automatic fire extinguishing device is a temperature-sensitive magnetic power generation device, which is mainly composed of a separate coil, a magnet and a spring. The magnet is fixed by hot-melt metal. When the temperature reaches the melting point of the metal, the metal melts, and the spring inserts the magnet into the center of the coil. Through electromagnetic induction power generation, the fire extinguisher explosion head is detonated to achieve automatic fire extinguishing. However, this device also has obvious disadvantages. When the magnetic field of the product in the environment changes, this device will be mistakenly detonated. For example, when thunder strikes, the changing electric field generates a magnetic field. The changing magnetic field causes the coil in the temperature-sensitive magnetic power generation device to generate current, thereby causing the fire extinguisher to spray by mistake. In addition, when the temperature reaches the melting point of the metal, it takes a long time to melt because the metal absorbs heat, which will cause the triggering to be untimely. That is, the temperature-sensitive magnetic power generation device in the related art has the possibility of false triggering and the defect of untimely triggering. Therefore, there is a need in the market for a temperature-sensitive thermal power generation fire extinguisher detonating device with a simple structure, accurate and timely triggering. Summary of the invention

[0004] The purpose of the present invention is to address the shortcomings of the prior art and provide a temperature-sensitive thermal power generation fire extinguisher detonating device with a simple structure and accurate and timely triggering, so as to solve the defects of the temperature-sensitive magnetic power generation device in the prior art that there is a possibility of false triggering and untimely triggering.

[0005] The purpose of the present invention can be achieved through the following technical solutions: A temperature-sensitive thermal power generation fire extinguisher detonating device, comprising a housing component and a trigger component, wherein the trigger component is arranged inside the housing component and extends from an open end of the housing component to the outside, wherein the trigger component comprises a capacitor, a temperature difference power generation sheet, a phase change material, a heat conducting sheet and a temperature control switch, wherein the heat conducting sheet is arranged at the open end of the housing component, the phase change material is arranged inside the housing component, the temperature difference power generation sheet is located between the heat conducting sheet and the phase change material and contacts the two, and the temperature control switch is mounted on the heat conducting sheet; The thermoelectric power generation sheet is electrically connected to the capacitor and the capacitor is used to store the electrical energy generated by the thermoelectric power generation sheet. The capacitor, the temperature control switch and the built-in detonating device of the fire extinguisher are electrically connected and when the temperature control switch heats up and closes, the electrical energy stored in the capacitor is released to the detonating device to trigger the explosion.

[0006] As a further optimization or improvement of this solution.

[0007] A heat conducting rod is arranged on one end surface of the heat conducting plate away from the temperature difference power generation plate, and a plurality of heat conducting rods are arranged in an array with equal spacing.

[0008] As a further optimization or improvement of this solution.

[0009] The trigger component also includes a spring arranged inside the housing component, and the elastic force of the spring always causes the phase change material to contact the temperature difference power generation sheet more closely.

[0010] As a further optimization or improvement of this solution.

[0011] The shell assembly comprises a base and an outer cylinder, one end of the outer cylinder is fixedly connected to the base, the other end of the outer cylinder forms the open end of the shell assembly, and the heat conducting sheet is located inside the other end of the outer cylinder.

[0012] As a further optimization or improvement of this solution.

[0013] A lug is arranged on the outer circumferential surface of one end of the outer cylinder, and the lug is fixedly connected to the base by bolts.

[0014] As a further optimization or improvement of this solution.

[0015] An arc-shaped limit platform is arranged on the inner circular surface of the other end of the outer cylinder, and the limit platform is overlapped on the end surface of the heat conducting plate away from the temperature difference power generation plate. There are multiple limit platforms and they are arranged in an array with equal spacing along the circumferential direction of the outer cylinder.

[0016] As a further optimization or improvement of this solution.

[0017] The spring is located between the base and the phase change material, one end of the spring contacts the base, and the other end of the spring contacts the phase change material. The elastic force of the spring forces the phase change material, the temperature difference power generation sheet and the heat conducting sheet to contact each other tightly.

[0018] As a further optimization or improvement of this solution.

[0019] The interior of the outer cylinder is provided with an insulating inner cylinder, and the inner cylinder is sleeved and covered on the outside of the temperature difference power generation sheet and the phase change material.

[0020] As a further optimization or improvement of this solution.

[0021] An inner sinking groove is provided at the center of one end surface of the base away from the outer cylinder, and a threading hole penetrating through the base is provided at the bottom of the inner sinking groove.

[0022] As a further optimization or improvement of this solution.

[0023] The side wall of the inner sinking tank is provided with a threading groove penetrating to the outer circumferential surface of the base.

[0024] Beneficial effects of the present invention: 1. When the starting temperature difference of the thermoelectric generator is reached, the thermoelectric generator generates a voltage of 5V and stores the generated current in the capacitor. When the temperature of the thermal conductive plate continues to rise and the temperature control switch fixed on the thermal conductive plate reaches the closing point, the temperature control switch closes and releases the current stored in the capacitor in advance to detonate the explosion device in the fire extinguisher, thereby realizing the jet fire fighting of the fire extinguisher. The triggering condition is only affected by the ambient temperature and will not be falsely triggered due to changes in the magnetic field, so the accuracy is higher.

[0025] 2. The present invention provides a spring, an inner cylinder and a heat-conducting rod, which can help the temperature difference power generation sheet to quickly reach the starting temperature difference when the ambient temperature rises abnormally, thereby improving the timeliness of triggering the explosion and ensuring a rapid response to firefighting. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0028] Figure 2 It is a schematic diagram of the internal structure of the present invention.

[0029] Figure 3 A schematic diagram of the structure of the housing assembly.

[0030] Figure 4 This is the matching diagram of the outer cylinder and the heat conducting sheet.

[0031] Figure 5 This is a diagram showing the coordination between the trigger assembly and the base.

[0032] Figure 6 This is a diagram showing the matching of the capacitor and the base.

[0033] Figure 7 This is the coordination diagram of the temperature control switch and the heat conducting sheet.

[0034] Figure 8 It is a circuit schematic diagram of the present invention.

[0035] Fig. 9 It is a temperature curve diagram of the slow heating experiment in the embodiment of the present invention.

[0036] Fig.10 It is a temperature curve diagram of the rapid heating experiment in the embodiment of the present invention.

[0037] The following are marked in the figure: 10, outer shell assembly; 11, base; 12, outer cylinder; 13, lug; 14, limit platform; 15, inner cylinder; 16, threading hole; 17, threading groove; 20, trigger assembly; 21, heat conductive sheet; 22, heat conductive rod; 23, temperature control switch; 24, phase change material; 25, temperature difference power generation sheet; 26, capacitor; 27, spring. DETAILED DESCRIPTION

[0038] The following will be combined with the 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 creative work are within the scope of protection of the present invention.

[0039] See also Figure 1-Figure 8 The above shows and describes the temperature-sensitive thermal power generation fire extinguisher detonating device, which includes a shell component 10 and a trigger component 20. The trigger component 20 is arranged inside the shell component 10 and extends from the open end of the shell component 10 to the outside. The trigger component 20 includes a capacitor 26, a temperature difference power generation sheet 25, a phase change material 24, a heat conductive sheet 21 and a temperature control switch 23. The heat conductive sheet 21 is arranged at the open end of the shell component 10, the phase change material 24 is arranged inside the shell component 10, the temperature difference power generation sheet 25 is located between the heat conductive sheet 21 and the phase change material 24 and contacts both of them, and the temperature control switch 23 is installed on the heat conductive sheet 21.

[0040] Specifically, the temperature difference power generation sheet 25 is electrically connected to the capacitor 26 and the capacitor 26 is used to store the electric energy generated by the temperature difference power generation sheet 25. The capacitor 26, the temperature control switch 23 and the built-in detonation ignition head of the fire extinguisher are electrically connected and when the temperature control switch 23 heats up and closes, the electric energy stored in the capacitor 26 is released to the detonation ignition head to trigger an explosion, thereby realizing the jet fire fighting of the fire extinguisher.

[0041] The working principle of the present invention is: when the ambient temperature rises abnormally, the heat conducting sheet 21 absorbs heat and the temperature rises, and the phase change material 24 maintains the original ambient temperature. When the ambient temperature continues to rise, the temperature of the heat conducting sheet 21 continues to rise. When the temperature difference reaches the starting temperature of the thermoelectric power generation sheet 25, the thermoelectric power generation sheet 25 generates a voltage of 5V and stores the generated current in the capacitor 26. When the temperature of the heat conducting sheet 21 continues to rise, the temperature control switch 23 fixed on the heat conducting sheet 21 reaches the closing point, and the temperature control switch 23 closes, releasing the current stored in the capacitor 26 in advance, detonating the explosion device in the fire extinguisher, and realizing the jet fire fighting of the fire extinguisher.

[0042] It should be noted that the temperature difference requirement of the thermoelectric generator depends on the specific application scenario and the specifications of the generator. Generally speaking, the temperature difference range of the thermoelectric generator can be from room temperature to several hundred degrees. For example, a smaller temperature difference: for some small applications, the thermoelectric generator can work under a smaller temperature difference. For example, some generators can generate voltage at a temperature difference of 20 degrees Celsius; larger temperature difference: for some industrial applications or special environments, the thermoelectric generator may need to work under a larger temperature difference. For example, some generators require a temperature difference of more than 250 degrees Celsius. The specific starting temperature difference selection is a conventional setting of those skilled in the art and will not be repeated here.

[0043] It should also be noted that the phase change material 24 is a 70°C solid-liquid phase change material, and its specific model is LTXC-PCM-A-70. Its specific material performance parameters and DSC curves are common knowledge that can be obtained by those skilled in the art, and will not be repeated here. That is, the invention of the present invention lies in the structural setting, not in the selection of the thermoelectric power generation sheet and the phase change material. Therefore, those skilled in the art can fully implement the technical solution disclosed in this application.

[0044] See also Figure 5 In order to enable the heat conducting sheet 21 to receive the abnormally high ambient temperature more quickly, a heat conducting rod 22 is provided on one end face of the heat conducting sheet 21 away from the temperature difference power generation sheet 25. A plurality of heat conducting rods 22 are arranged in an array with equal spacing. Since the heat conducting rods 22 are completely extended to the outside of the housing assembly 10, the heat conducting rods 22 can quickly conduct the abnormally high ambient temperature to the heat conducting sheet 21, so that the temperature of the heat conducting sheet 21 can be increased quickly and timely, which is beneficial for the temperature difference power generation sheet 25 to quickly reach the starting temperature difference, thereby improving the timeliness of triggering the explosion.

[0045] See also Figure 5In order to further improve the temperature difference power generation sheet 25 to quickly reach the starting temperature difference, the trigger component 20 also includes a spring 27 arranged inside the shell component 10. The elastic force of the spring 27 always causes the phase change material 24 to contact the temperature difference power generation sheet 25 more closely. The significance of this technical solution is to ensure that the temperature difference power generation sheet 25 contacts the phase change material 24 and the heat conductive sheet 21 more closely, which is beneficial to the accuracy of the temperature difference power generation sheet 25 sensing the temperature difference, and is beneficial to the temperature difference power generation sheet 25 to quickly reach the starting temperature difference, thereby improving the timeliness of triggering the explosion.

[0046] See also Figure 2-3 The shell assembly 10 includes a base 11 and an outer cylinder 12. One end of the outer cylinder 12 is fixedly connected to the base 11, and the other end of the outer cylinder 12 forms an open end of the shell assembly 10. The heat conducting plate 21 is located inside the other end of the outer cylinder 12.

[0047] Specifically, a lug 13 is provided on the outer circumferential surface of one end of the outer cylinder 12 , and the lug 13 is fixedly connected to the base 11 by bolts.

[0048] Specifically, an arc-shaped limit platform 14 is provided on the inner circular surface of the other end of the outer cylinder 12, and the limit platform 14 is overlapped on the end surface of the heat conducting plate 21 away from the temperature difference power generation plate 25. There are multiple limit platforms 14 and they are arranged in an array with equal spacing along the circumferential direction of the outer cylinder 12.

[0049] See also Figure 5 More specifically, the spring 27 is located between the base 11 and the phase change material 24, one end of the spring 27 is in contact with the base 11, and the other end of the spring 27 is in contact with the phase change material 24. The elastic force of the spring 27 causes the phase change material 24, the temperature difference power generation sheet 25 and the heat conductive sheet 21 to be pressed tightly together. Due to the limiting constraint of the limit platform 14 on the heat conductive sheet 21, the heat conductive sheet 21 will not be separated from the outer cylinder 12.

[0050] In order to prevent the external ambient temperature from directly transmitting to the thermoelectric power generation sheet 25 and the phase change material 24, an insulating inner cylinder 15 is arranged inside the outer cylinder 12, and the inner cylinder 15 is sleeved and covered on the outside of the thermoelectric power generation sheet 25 and the phase change material 24. The significance of adopting this scheme is to prevent the thermoelectric power generation sheet 25 from being directly affected by the ambient temperature, resulting in a prolonged time for triggering the starting temperature difference.

[0051] See also Figure 3 In order to facilitate wiring, an inner groove is provided at the center of one end surface of the base 11 away from the outer cylinder 12, a threading hole 16 penetrating the base 11 is provided at the bottom of the inner groove, and a threading groove 17 penetrating to the outer cylindrical surface of the base 11 is provided on the side wall of the inner groove. Through the arrangement of the threading hole 16 and the threading groove 17, it is convenient to lay wires to electrically connect the capacitor 26, the temperature control switch 23 and the explosion device in the fire extinguisher.

[0052] In another specific embodiment of the present invention, Figure 8 According to the circuit principle in Figure 1-Figure 7 The structure in the figure is set up, a 2200uF / 10V capacitor is used, the temperature difference power generation chip outputs a DC voltage of 5V, the temperature control switch is 95±5℃, 15g of phase change material with a phase change temperature of 70℃ is used, and the phase change enthalpy of the phase change material is 220J / g, the storage environment is -40~90℃, ≤RH85%; Using the temperature difference between the heat sink (hot end) and the cold end (phase change material and container), when the temperature difference is 13 degrees, the generator outputs a 5V voltage, and the output end of the generator is connected to a 2200UF / 10V electrolytic capacitor. The capacitor is fully charged in about 5 seconds. The ignition head is connected in parallel with the capacitor, and there are two temperature control switches (KSD9700) connected in parallel and in series in the loop. When the temperature of KSD9700 reaches 95±5℃, the temperature control switch is closed (one or both are closed at the same time), the loop is turned on, and the capacitor instantly discharges to the connected ignition head, causing the ignition head to explode; In actual verification, the above device was sequentially placed in a hot air reflow oven under different working conditions, and the setting conditions were: 55°C, 1 hour; 65°C, 1 hour; 75°C, 5 minutes; 80°C, 5 minutes; 85°C, 5 minutes; 90°C, 5 minutes; 120°C, 1 minute; 170°C, 1 minute; 220°C, 1 minute; 250°C, 20 minutes; The curve of the internal temperature of the oven and the temperature at the hot end of the product can be obtained as follows: Fig. 9 As shown, Fig. 9 The broken line in the upper middle is the temperature broken line graph of the hot air reflow oven, and the broken line graph below is the temperature broken line graph of the hot end of the temperature-sensing thermal power generation device.

[0053] In another case of the above embodiment, a rapid temperature rise experiment is conducted by igniting a household gas stove and placing the product above the flame so that the heat sink contacts the flame. The test curve is as follows: Fig.10 As shown, through Fig.10 It can be seen that at the 4th second, power generation has started, at the 6th second, charging has been completed, and at the 9th second, the temperature control switch is closed and the ignition head is detonated, which meets the technical requirements.

[0054] The basic principles, main features and advantages of the invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements fall within the scope of the present invention to be protected.

Claims

1. A temperature-sensitive heat-generating fire extinguisher detonating device, characterized in that: The invention comprises a housing component (10) and a trigger component (20), wherein the trigger component (20) is arranged inside the housing component (10) and extends from an open end of the housing component (10) to the outside, wherein the trigger component (20) comprises a capacitor (26), a temperature difference power generation sheet (25), a phase change material (24), a heat conductive sheet (21) and a temperature control switch (23), wherein the heat conductive sheet (21) is arranged at the open end of the housing component (10), the phase change material (24) is arranged inside the housing component (10), the temperature difference power generation sheet (25) is located between the heat conductive sheet (21) and the phase change material (24) and contacts both of them, and the temperature control switch (23) is mounted on the heat conductive sheet (21); The temperature difference power generation sheet (25) is electrically connected to the capacitor (26), and the capacitor (26) is used to store the electric energy generated by the temperature difference power generation sheet (25). The capacitor (26), the temperature control switch (23), and the built-in detonation device of the fire extinguisher are electrically connected, and when the temperature control switch (23) heats up and closes, the electric energy stored in the capacitor (26) is released to the detonation device to trigger an explosion.

2. The temperature-sensitive thermal power generation fire extinguisher detonating device according to claim 1, characterized in that: A heat conducting rod (22) is provided on one end surface of the heat conducting sheet (21) facing away from the temperature difference power generation sheet (25), and a plurality of heat conducting rods (22) are provided and arranged in an array at equal intervals.

3. The temperature-sensitive thermal power generation fire extinguisher detonating device according to claim 1, characterized in that: The trigger component (20) further comprises a spring (27) arranged inside the housing component (10), and the elastic force of the spring (27) always causes the phase change material (24) to contact the temperature difference power generation sheet (25) more closely.

4. The temperature-sensitive thermal power generation fire extinguisher detonating device according to claim 3, characterized in that: The shell assembly (10) comprises a base (11) and an outer cylinder (12); one end of the outer cylinder (12) is fixedly connected to the base (11); the other end of the outer cylinder (12) forms an open end of the shell assembly (10); and the heat conducting sheet (21) is located inside the other end of the outer cylinder (12).

5. The temperature-sensitive thermal power generation fire extinguisher detonating device according to claim 4, characterized in that: A lug (13) is provided on the outer circumferential surface of one end of the outer cylinder (12), and the lug (13) is fixedly connected to the base (11) by means of bolts.

6. The temperature-sensitive thermal power generation fire extinguisher detonating device according to claim 4, characterized in that: An arc-shaped limit platform (14) is provided on the inner circular surface of the other end of the outer cylinder (12), and the limit platform (14) is overlapped on the end surface of the heat conducting plate (21) facing away from the temperature difference power generation plate (25). A plurality of limit platforms (14) are provided and are arranged in an array at equal intervals along the circumferential direction of the outer cylinder (12).

7. The temperature-sensitive thermal power generation fire extinguisher detonating device according to claim 4, characterized in that: The spring (27) is located between the base (11) and the phase change material (24); one end of the spring (27) contacts the base (11), and the other end of the spring (27) contacts the phase change material (24); the elastic force of the spring (27) causes the phase change material (24), the temperature difference power generation sheet (25), and the heat conducting sheet (21) to contact each other tightly.

8. The temperature-sensitive thermal power generation fire extinguisher detonating device according to claim 4, characterized in that: The outer cylinder (12) is provided with a heat-insulating inner cylinder (15), and the inner cylinder (15) is sleeved and coated on the outside of the temperature difference power generation sheet (25) and the phase change material (24).

9. The temperature-sensitive thermal power generation fire extinguisher detonating device according to any one of claims 4 to 8, characterized in that: An inner sink groove is provided at the center of one end surface of the base (11) facing away from the outer cylinder (12), and a threading hole (16) penetrating the base (11) is provided at the bottom of the inner sink groove.

10. The temperature-sensitive thermal power generation fire extinguisher detonating device according to claim 9, characterized in that: The side wall of the inner sink is provided with a threading groove (17) penetrating to the outer circumferential surface of the base (11).

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