WO2009067870A1

WO2009067870A1 - High-reliable electronic ignition device and aerosol fire extinguisher

Info

Publication number: WO2009067870A1
Application number: PCT/CN2008/071681
Authority: WO
Inventors: Taili Zhou; Xing Zhou
Original assignee: Taili Zhou; Xing Zhou
Priority date: 2007-11-28
Filing date: 2008-07-17
Publication date: 2009-06-04
Also published as: CN101176814A; CN101176814B

Abstract

A high-reliable electronic ignition device, comprises an opening switch(1), a movement mechanism (2), a shape memory alloy temperature induction control element (3), an electric squib (4), an electrical wire (5) and a shell(9). The shape memory alloy temperature induction control element (3) controls the operation of the movement mechanism (2), and the operation of the movement mechanism (2) can close the opening switch(1), which can switch on the circuit of the electric squib (4) and the current is passed to the electric squib (4) by the electrical wire (5), then the electric squib (4) begins to work.

Description

Technical field

The present invention relates to an electronic ignition device, and more particularly to a high reliability electronic ignition device for use in an aerosol fire extinguisher that is triggered by an inductive ambient temperature.

Background technique

[2] Aerosol fire extinguishers are new and environmentally friendly products with zero ozone depletion potential (ODP) and greenhouse effect potential (GNP), no pollution to the environment, and short residual life in the atmosphere. It is non-toxic, non-corrosive, non-hygroscopic, non-conductive and can effectively extinguish Class A surface fire, Class B fire and electrical fire. The product has a wide range of applications and is suitable for protection of various spaces. It is especially suitable for the protection of precision instruments and equipment. The applicable protection spaces are: locomotives, ships, power distribution rooms, relay rooms, generator rooms, cable trenches, computer rooms, warehouses. , storage room, boiler room, communication base station, automobile engine, ship engine, etc.

[3] The problem of accidental spray of aerosol fire extinguishers is the most common situation at present. Many articles on the analysis of accidental spray problems have been published. It is nothing more than the quality of controllers. The 24V power supply of the control system can only be started in series (3 or more).

Electric squib type initiator. In order to improve the starting ability, such fire extinguishing devices often need to be equipped with a special starter or starting module to boost the 24 V power supply to several hundred volts.

Capacitor charging and instantaneous discharge are used to excite the electric squib action.

[4] It is obviously unfair to attribute the cause of the accidental spray problem to the quality of the fire extinguishing controller. Because other conventional gas fire extinguishing systems also use the same standard gas fire extinguishing controller, there is no crisis of confidence in the product itself. Happening. The gas fire extinguishing controller is a standard equipment for the fire protection industry and has strict requirements for electromagnetic interference resistance. For a long time, the anti-electromagnetic interference performance indicators of electric squibs in aerosol fire extinguishers have been ignored. In addition, it is problematic to directly migrate the product standard of the electric squib itself to the fire protection product standard because the conditions of use are quite different. Most of the electric squibs are designed for special applications. The squat is in a safe storage state or a locked state after installation. It can only be installed before use (such as engineering blasting, explosion welding, etc.) or open before use. Safety devices (such as manual unlocking of the flight cockpit, inertia unlocking of the car airbag, etc.). The electric squib in the aerosol fire extinguisher is connected to the complex control In the network, the equivalent area of the loop that absorbs electromagnetic radiation is often large and unrestricted, which is equivalent to being in a state of being fired, so that mis-injection is prone to occur.

[5] From a technical perspective, the current problems with aerosol fire extinguishing products are mainly concentrated on electric squib-type initiators. Improving the anti-electromagnetic interference performance of electric squibs has always been a major issue in the pyrotechnics industry, and electric squib technology is also a national defense core technology that is not secreted by various countries. As an electric squib for aerosol fire extinguisher initiators, the requirements for stability and insensitivity are more important because of their years of online use. Dedicated electric squibs should be developed and interlocks added to address misfire problems, life issues and start-up reliability of aerosol fire extinguishers.

Disclosure of invention

technical problem

[6] An object of the present invention is to provide a high-reliability electronic ignition device which is in the case of external power supply fluctuations

Or in the case of strong electromagnetic interference, such as lightning induction, charged cloud sensing, radio frequency, static electricity, stray surge current and other strong electromagnetic interference, the electric squib will not be excited, and no accidental spray will occur.

Technical solution

[7] The high reliability electronic ignition device of the present invention comprises: a normally open switch disposed on a circuit of the electric squib; a moving mechanism coupled to the normally open switch, configured to operate when the moving mechanism is activated The normally open switch can be closed to turn on the circuit of the electric squib, and the current is sent to the electric squib through the electric wire to activate the electric squib; the shape memory alloy temperature sensing control element is connected to the moving mechanism and configured to be Controlling the motion of the motion mechanism; the housing, the normally open switch, the motion mechanism, and the shape memory alloy temperature sensing control element are fixed to the housing.

[8] The high reliability electronic ignition device according to the present invention, further comprising an electric heating element mounted on the shape memory alloy temperature sensing control element.

[9] The high reliability electronic ignition device according to the present invention, further comprising an electric heating element mounted in a region where the shape memory alloy temperature sensing control element senses a temperature change.

[10] According to the high reliability electronic ignition device of the present invention, the shape memory alloy temperature sensing control element is a geometric wire plate or casting made of a shape memory alloy, and the recovery temperature is 45 ° C. Between ~350 °C. Usually, in the fire room, relay room, generator room, cable trench, computer room, warehouse, storage room, communication base station, etc., the shape memory alloy with recovery temperature of 75 °C ± 2 °C is selected. A shape memory alloy temperature sensing control element is manufactured; and in a fire engine such as an automobile engine or a ship engine, a shape memory alloy having a recovery temperature of 175 ° C ± 2 ° C is used to manufacture a shape memory alloy temperature sensing control element. Furthermore, the shape memory alloy temperature sensing control elements can have different geometries depending on the application and the specific design.

[11] The present invention also provides an aerosol fire extinguisher.

[12] The aerosol fire extinguisher of the present invention comprises a high reliability electronic ignition device as described in the present invention.

[13] Various prior art aerosol fire extinguishers or devices can employ the high reliability electronic ignition device of the present invention as an initiator for an aerosol fire extinguisher or device.

Beneficial effect

[14] The high-reliability electronic ignition device of the present invention comprises a normally open switch, a moving mechanism, a shape memory alloy temperature sensing control element, an electric squib, a wire and a casing; and a shape memory alloy temperature sensing control element controls the movement The action of the mechanism; the action of the moving mechanism causes the normally open switch to close, thereby turning on the circuit of the electric squib, and the current is delivered to the electric squib through the electric wire to activate the electric squib. Since the simple electrical excitation is changed to the thermal excitation, the high reliability of the electronic ignition device is greatly improved, and the false spray phenomenon is fundamentally avoided. It has strong resistance to external power supply fluctuations and strong electromagnetic interference. The invention has simple structure and can be widely applied to various aerosol automatic fire extinguishers, and is safe and reliable, and has a long service life.

DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing the structure of a high-reliability electronic ignition device according to the present invention at an ambient temperature lower than a recovery temperature of a shape memory alloy.

[16] Figure 2 is a schematic view showing the structure of the high-reliability electronic ignition device of Figure 1 at an ambient temperature higher than the recovery temperature of the shape memory alloy. The shape memory alloy temperature sensing control element in this figure has been released.

Figure 3 is a schematic view showing the structure of the high-reliability electronic ignition device with electric heating elements of the present invention at an ambient temperature lower than the recovery temperature of the shape memory alloy.

[18] Figure 4 is a schematic view showing the structure of the high-reliability electronic ignition device with the electric heating element of Fig. 3 at an ambient temperature higher than the recovery temperature of the shape memory alloy. The shape memory alloy temperature sensing control element in this figure has been released.

Figure 5 is a schematic view showing the structure of a plurality of aerosol fire extinguishers according to the present invention for controlling a plurality of aerosol fire extinguishers at an ambient temperature lower than a recovery temperature of a shape memory alloy.

[20] Figure 6 is a high-reliability electronic ignition device of Figure 5 controlling multiple aerosol fire extinguishers 吋 at ambient temperature above shape Schematic diagram of the recovery of temperature 吋 of the shape memory alloy. The shape memory alloy temperature sensing control element in this figure has been released.

7 is a schematic view showing the structure of a plurality of aerosol fire extinguishers with electric heating elements according to the present invention for controlling a plurality of aerosol fire extinguishers at an ambient temperature lower than a recovery temperature of a shape memory alloy.

[22] Figure 8 is Figure 7

The high-reliability electronic ignition device with electric heating elements controls the structure of a plurality of aerosol fire extinguishers 环境 at an ambient temperature higher than the recovery temperature of the shape memory alloy. The shape memory alloy temperature sensing control element in this figure has been released.

[23] In the above picture: 1 is a normally open switch, 2 is a motion mechanism, 3 is a shape memory alloy temperature sensing control element, 4 is an electric squib, 5 is an electric wire, 6 is an aerosol generating agent, 7 is a generator, 8 is a cooling device, 9 is a casing, 10 is a power source, 11 is a circuit switch, 12 is an electric heating element, 26 is a normal spring, and 27 is a shaft.

BEST MODE FOR CARRYING OUT THE INVENTION

[24] Example 1: High reliability electronic ignition device

[25] The normally open switch 1 is manufactured separately according to the conventional metal working process and manufacturing process. The ordinary spring 26 and the shaft 27 are manufactured as the moving mechanism 2 in accordance with a conventional metal working process and manufacturing process. The housing 9 is manufactured in a general metal or plastic processing process. The shape memory alloy temperature sensing control element 3 is manufactured according to a general shape memory alloy manufacturing process, and is subjected to a shaping heat treatment to make the opening distance of the shape memory alloy temperature sensing control element 3 larger than the recovery temperature of the shape memory alloy. The opening distance of the temperature sensing control element 3.

[26] The ordinary spring 26 of the manufactured moving mechanism 2 is mounted on the shaft 27, and one end of the normally open switch 1 is connected to the shaft 27 of the moving mechanism 2, and the other end of the normally open switch 1 is fixed to the housing 9. Upper end of the normally open switch 1 connected to the shaft 27 is movable in the axial direction of the shaft 27 toward the other end of the normally open switch 1 by the action of the ordinary spring 26. Then, the shape memory alloy temperature sensing control element 3 is caught on the head of the shaft 27, so that the ordinary spring 26 is in a compressed state. Referring to FIG. 1, the high reliability electronic ignition device of the present invention is obtained at an ambient temperature lower than that. The shape memory alloy restores the structure of the temperature enthalpy.

[27] When the ambient temperature is higher than the shape memory alloy recovery temperature used by the shape memory alloy temperature sensing control element 3, the shape memory alloy temperature sensing control element 3 is opened and falls off, resulting in the switch memory alloy temperature sensing control element 3 The head of the shaft 27 cannot be caught, and the compressed common spring 26 releases the restraining force and pushes The normally open switch 1 is closed, the current is passed through the normally open switch 1, and is sent from the electric wire 5 to the electric squib 4, triggering the electric squib 4 to work, the electric squib 4 points the sol generating agent 6, and the generator 7 reacts to generate the fire extinguishing required Smoke, see Figure 2

[28] Connecting wires 5釆 Common electric wires such as ordinary copper wires with a diameter of 1.2 mm and general-purpose electric squibs for electric squibs can be purchased on the market.

[29] According to different requirements, shape memory alloys with different recovery temperatures can be selected. For example, the machine room, power station, etc. can choose to restore the temperature of 75 °C ± 2 °C titanium nickel shape memory alloy, you can also choose other recovery temperature is 72 ° Copper-based shape memory alloy of C. For fire extinguishing devices used in vehicle engines and propagating engines, iron-based shape memory alloys with a recovery temperature of 150 ° C to 250 ° C can be used. For example, shape memory alloys with 175 ° C ± 2 ° C are used for temperature sensing control of shape memory alloys. Element 3.

[30] The invention has a simple structure, and the electric trigger is turned into a thermal trigger, which is safe and reliable.

[31] Example 2: High reliability electronic ignition device with electric heating element

[32] This embodiment is basically the same as Embodiment 1, except that the electric heating element 12 is added, so that the implementation 1 can only be excited by the change of the ambient temperature, and the embodiment can also be excited by the electronic control.

[33] When the circuit switch 11 is closed, the heating element 12 generates heat, and when the shape memory alloy temperature sensing control element 3 senses that the temperature exceeds its recovery temperature, the shape memory alloy temperature sensing control element 3 acts, shape memory alloy temperature sensing control The element 3 is opened and released from the head of the shaft 27, and the compressed common spring 26 releases the restraining force, pushing the normally open switch 1 to close, the current is passed through the normally open switch 1, and is transmitted from the electric wire 5 to the electric squib 4, triggering the electric blast Tube 4 works, electric squib 4 points of aerosol generating agent 6, generator 7 reacts to generate the smoke required for fire extinguishing, refer to Figure 3 to Figure 4.

[34] Example 3: High reliability electronic ignition device controls multiple aerosol fire extinguishers

[35] This embodiment is basically the same as Embodiment 1, except that a high-reliability electronic ignition device is used to control and activate nine aerosol fire extinguishers. Each of the three fire extinguishing devices is connected in series, and each of the three sets is connected in parallel. Together. Refer to Figures 5 through 6. However, it is not limited to the above-mentioned number of aerosol fire extinguishers, and a plurality of aerosol fire extinguishers can be used in series, parallel or serial and mixed connection according to actual needs.

[36] Example 4: High reliability electronic ignition device with electric heating element controls multiple aerosol fire extinguishers

[37] This embodiment is basically the same as Embodiment 2. The difference is that the high-reliability electronic ignition device controlled by one electric heating element activates nine aerosol fire extinguishers, and each of the three fire extinguishing devices is connected in series, every 3 Group and Linked together. Refer to Figures 7 through 8. However, it is not limited to the above-mentioned number of aerosol fire extinguishers, and a plurality of aerosol fire extinguishers may be connected in series, in parallel, or in series and mixed according to actual needs.

It should be noted that the structures disclosed and illustrated herein may be replaced with other structures having the same effect, and the embodiments described herein are not the only structures that implement the invention. While the preferred embodiments of the present invention have been described and illustrated herein, it will be apparent to those skilled in the art that Instead, the scope of the present invention is defined by the spirit and scope of the appended claims.

Claims

Claim

[1] 1. High reliability electronic ignition device, including:

The normally open switch (1) is disposed on the circuit of the electric squib (4);

a moving mechanism (2), connected to the normally open switch (1), configured to turn on the normally open switch (1) when the moving mechanism (2) is actuated, thereby turning on the circuit of the electric squib (4) , the current is transmitted to the electric squib (4) through the electric wire (5) to activate the electric squib (4); the shape memory alloy temperature sensing control element (3) is connected to the moving mechanism (2), and is configured to be Controlling the movement of the motion mechanism (2);

The housing (9), the normally open switch (1), the motion mechanism (2), and the shape memory alloy temperature sensing control element (3) are fixed to the housing (9).

[2] 2. The high reliability electronic ignition device according to claim 1, further comprising: an electric heating element (12), wherein the electric heating element (12) is mounted on a shape memory alloy temperature sensing control element (3) on.

[3] 3. The high reliability electronic ignition device according to claim 1, further comprising: an electric heating element (12) mounted on the shape sensing alloy temperature sensing control element ( 3) Feel the area where the temperature changes.

[4] 4. The high-reliability electronic ignition device according to claim 1, wherein: the shape memory alloy temperature sensing control element (3) is a geometric wire made of a shape memory alloy, Plate or casting, the recovery temperature is between 45 ° C ~ 350 ° C.

[5] 5. An aerosol fire extinguisher comprising the high reliability electronic ignition device of claim 1.