Fire extinguisher activation device

Abstract

The present invention discloses a fire extinguisher starting device, comprising an independent starting power supply, a temperature sensor, a starting logic circuit, and a fire extinguisher starting circuit; the fire extinguisher starting circuit, the starting logic circuit, and the temperature sensor are electrically connected to the independent starting power supply respectively; the temperature sensor is electrically connected to the starting logic circuit, and the starting logic circuit is also electrically connected to the fire extinguisher starting circuit. Therefore, the fire extinguisher starting device of the present invention uses an independent starting power supply to start the fire extinguisher, avoiding the large current at the moment of starting to lower the voltage of the main standby power supply, and ensuring the overall stable operation of the main fire protection system.

Description

Technical Field

[0001] The invention relates to the field of fire protection, and in particular to a fire extinguisher starting device. Background Art

[0002] The current large current driven electric initiator fire extinguishing device has the problem of excessive starting current.

[0003] The electric initiator is also called the ignition head. The ignition head exhibits pure resistance characteristics, with a resistance of about 2 to 4 ohms. It is often used to start fire extinguishing devices such as aerosols, dry powder, hexafluoropropane, and perfluorohexanone. When external voltage is applied, current flows through the ignition head, generating heat, igniting the fire extinguisher starter pack, and then igniting the fire extinguishing agent to achieve the purpose of starting the fire extinguisher. The DC voltage provided at general industrial sites is 24V, and the current value required for starting is 8A. A large starting current may cause the following problems:

[0004] When a fire occurs, the main power of each system will be cut off, and the fire protection system will be powered by the backup power supply. The current at the moment of starting the fire extinguisher is too large, which will cause the backup power supply voltage to drop sharply. When the voltage drops to a certain level, it will cause the main fire protection system to reset and restart, affecting the basic alarm function of the fire protection system, and even trigger the backup power supply's own protection mechanism, disconnecting the backup power supply load, causing the fire extinguisher to fail to start. The existing solution is generally to add a current limiting resistor or adjust the starting voltage.

[0005] 1) Add current limiting resistor

[0006] That is, a current limiting resistor is connected in series between the ignition head and the power supply to reduce the starting current to about 500 mA. When the fire protection system is powered by a backup power supply, electrical energy is very precious, but this method will cause energy consumption in the current limiting resistor.

[0007] 2) Reduce the starting voltage

[0008] It is necessary to configure a step-down circuit for the fire extinguisher starting circuit. The resistance of the ignition head of fire extinguishers from different manufacturers fluctuates between 2 and 4 ohms, so the starting current is not the same and it is difficult to achieve uniformity. Summary of the invention

[0009] The technical problem to be solved by the present invention is to provide a fire extinguisher starting device.

[0010] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0011] A fire extinguisher starting device, characterized in that it includes an independent starting power supply, a temperature sensor, a starting logic circuit, and a fire extinguisher starting circuit;

[0012] The fire extinguisher starting circuit, starting logic circuit and temperature sensor are electrically connected to independent starting power supplies respectively; the temperature sensor is electrically connected to the starting logic circuit, and the starting logic circuit is also electrically connected to the fire extinguisher starting circuit.

[0013] The independent starting power supply is used to provide working power;

[0014] The temperature sensor is used to detect changes in ambient temperature;

[0015] The start-up logic circuit determines whether the fire extinguisher needs to be started according to the ambient temperature sensed by the temperature sensor.

[0016] Compared with the prior art, this solution has achieved the following beneficial effects: as a component of the fire protection system, the fire extinguisher starting device uses an independent starting power supply to start the fire extinguisher, avoiding the large current at the moment of starting that lowers the voltage of the main backup power supply of the fire protection system, thereby ensuring the overall stable operation of the fire protection system.

[0017] Based on the above technical solution, the present invention can also be improved as follows.

[0018] Preferably, it also includes a charging circuit, wherein the charging circuit is electrically connected to the independent starting power supply and the external power supply;

[0019] The beneficial effect of adopting the above further solution is that when the external power supply is normal, the independent starting power supply can be charged to ensure that the independent starting power supply has sufficient power, and there is no need to frequently replace the independent starting power supply. The starting logic circuit collects the power of the independent starting power supply to determine whether to use the independent starting power supply to start the fire extinguisher;

[0020] Preferably, the independent starting power supply comprises a first independent starting power supply and a second independent starting power supply, the first independent starting power supply is used to power the temperature sensor and the starting logic circuit, and the second independent starting power supply is used to power the fire extinguisher starting circuit;

[0021] The charging circuit includes a first charging circuit and a second charging circuit, the first charging circuit charges the first independent starting power supply, and the second charging circuit charges the second independent starting power supply.

[0022] The beneficial effect of adopting the above further scheme is to further reduce the influence range of the large current at the moment of starting the fire extinguisher, so that the temperature sensor and the starting logic circuit are protected from the influence of the large current at the moment of starting, thereby ensuring normal operation.

[0023] Preferably, it also includes a charging logic circuit, which is electrically connected to the first independent starting power supply, the fire extinguisher starting circuit and the second charging circuit.

[0024] The beneficial effect of adopting the above further scheme is that when the fire extinguisher is started, the charging logic circuit learns through the second charging circuit that the second independent starting power supply does not have sufficient energy to start the fire extinguisher, and then the charging logic circuit controls the second charging circuit to directly power the fire extinguisher starting circuit from the external power supply, ensuring that the fire extinguisher is started normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0026] Figure 2 To start the logic circuit truth table;

[0027] Figure 3 It is the truth table of charging logic circuit;

[0028] Figure 4 This is a schematic diagram of the structure of Example 2 of the present invention.

[0029] In the accompanying drawings, the component names represented by the reference numerals are listed as follows:

[0030] 1. External power supply; 2. Charging circuit; 2-1. First charging circuit; 2-2. Second charging circuit; 3. Supercapacitor; 3-1. First supercapacitor; 3-2. Second supercapacitor; 4. Temperature sensor; 5. Charging logic circuit; 6. Fire extinguisher starting circuit; 6-1. Fire extinguisher starting resistor; 7. Starting logic circuit; 7-1. Fire extinguisher starting feedback circuit. DETAILED DESCRIPTION

[0031] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0032] Embodiment 1:

[0033] Please refer to Figure 1 As shown, it is a schematic diagram of the structure of the fire extinguisher starting device of the present invention.

[0034] The device is designed with a first super capacitor 3-1, a second super capacitor 3-2, a first charging circuit 2-1, a second charging circuit 2-2, a temperature sensor 4, a charging logic circuit 5, a start logic circuit 7, and a fire extinguisher start circuit 6. The first super capacitor 3-1 is a first independent start power supply, and the second super capacitor 3-2 is a second independent start power supply.

[0035] The first charging circuit 2-1 is electrically connected to the external power source 1 and the first super capacitor 3-1;

[0036] The second charging circuit 2-2 is electrically connected to the external power supply 1 and the second super capacitor 3-2;

[0037] The first super capacitor 3-1 is electrically connected to the temperature sensor 4, the start logic circuit 7 and the charging logic circuit 5 to provide working power;

[0038] The second super capacitor 3-2 is electrically connected to the fire extinguisher starting circuit 6;

[0039] The charging logic circuit 5 is electrically connected to the second charging circuit 2-2 and the fire extinguisher starting circuit 6;

[0040] The start logic circuit 7 is also electrically connected to the temperature sensor 4 and the fire extinguisher start circuit 6;

[0041] The fire extinguisher start circuit 6 starts the fire extinguisher by energizing the fire extinguisher start resistor 6-1;

[0042] The start logic circuit 7 is also electrically connected to the fire extinguisher start feedback circuit 7-1, so that it can be known whether the fire extinguisher is started normally.

[0043] The first super capacitor 3-1 is responsible for supplying power to the temperature sensor 4 and the start-up logic circuit 7. The second super capacitor 3-2 is responsible for supplying power to start the fire extinguisher.

[0044] The first charging circuit 2-1 is responsible for charging the first super capacitor 3-1 when there is external power supply. The second charging circuit 2-2 is responsible for charging the second super capacitor 3-2 when there is external power supply, and is controlled by the charging logic circuit 5 to determine whether to perform the charging action.

[0045] The logic truth table of the charging logic circuit 5 is as follows: Figure 3 shown.

[0046] The fire extinguisher starting circuit 6 is responsible for releasing the electricity of the second super capacitor 3 - 2 to the fire extinguisher starting resistor 6 - 1 . The fire extinguisher starting circuit 6 is controlled by the starting logic circuit 7 and outputs a signal to the charging logic circuit 5 .

[0047] The logic truth table of the fire extinguisher activation logic circuit 7 is as follows: Figure 2 shown.

[0048] When the first super capacitor 3 - 1 supplies power, the temperature sensor 4 and the start-up logic circuit 7 continue to operate with low power consumption.

[0049] The temperature sensor 4 is used to sense the ambient temperature, and the temperature information is used as the judgment condition for the fire extinguisher to "start". The fire extinguisher start feedback circuit 7-1 is used to provide a "fire extinguisher starts normally" signal, which is used as the judgment condition for the fire extinguisher start circuit 6 to "stop". When the start logic circuit 7 receives the "normal start" signal provided by the fire extinguisher start feedback circuit 7-1, it is determined that the fire extinguisher has been started normally, and the start logic circuit 7 turns off the fire extinguisher start circuit 6, that is, stops supplying power to the fire extinguisher start resistor 6-1 to save energy.

[0050] The charging logic circuit 5 ensures that the capacitor is fully charged and the stored electrical energy is sufficient to activate the fire extinguisher.

[0051] If the second super capacitor 3 - 2 is fully charged when the fire extinguisher is started, only the power of the second super capacitor 3 - 2 is used to power the fire extinguisher starting circuit 6 .

[0052] If the second supercapacitor 3-2 is in a low-power state when the fire extinguisher is activated, the power of the external power supply 1 is used through the second charging circuit 2-2 to ensure that the fire extinguisher can be activated.

[0053] Embodiment 2:

[0054] like Figure 4 As shown, only one super capacitor 3 is used to supply power to the temperature sensor 4, the fire extinguisher start circuit 6, and the start logic circuit 7.

[0055] When the super capacitor 3 supplies power, the temperature sensor 4 and the start-up logic circuit 7 continue to work with low power consumption.

[0056] The temperature sensor 4 is used to sense the ambient temperature, which is used as a judgment condition for the fire extinguisher to "start". The fire extinguisher start feedback circuit 7-1 is used to provide a "normal start" signal, which is used as a judgment condition for the fire extinguisher start circuit 6 to "stop". When the start logic circuit 7 receives the "fire extinguisher normal start" signal provided by the fire extinguisher start feedback 7-1, it is determined that the fire extinguisher has been started normally, and then the start circuit is turned off, that is, the power supply to the fire extinguisher start resistor 6-1 is stopped to save energy.

[0057] 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 principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A fire extinguisher starting device, characterized in that: Including independent starting power supply, temperature sensor, starting logic circuit, fire extinguisher starting circuit; The fire extinguisher start circuit, start logic circuit, and temperature sensor are electrically connected to independent start power supplies respectively; the temperature sensor is electrically connected to the start logic circuit, and the start logic circuit is also electrically connected to the fire extinguisher start circuit; Also included is a charging circuit, the charging circuit electrically connecting the independent starting power supply and an external power supply; The independent starting power supply includes a first independent starting power supply and a second independent starting power supply, the first independent starting power supply is used to power the temperature sensor and the starting logic circuit, and the second independent starting power supply is used to power the fire extinguisher starting circuit; The charging circuit includes a first charging circuit and a second charging circuit, the first charging circuit charges the first independent starting power supply, and the second charging circuit charges the second independent starting power supply; Also included is a charging logic circuit, the charging logic circuit being electrically connected to the first independent starting power source, the fire extinguisher starting circuit, and the second charging circuit; The fire extinguisher start circuit is responsible for releasing the electricity of the second super capacitor to the fire extinguisher start resistor. The fire extinguisher start circuit is controlled by the start logic circuit and outputs a signal to the charging logic circuit. The charging logic circuit is used to ensure that the capacitor is in a fully charged state and the stored electric energy is sufficient to start the fire extinguisher; if the second supercapacitor is in a fully charged state when the fire extinguisher is started, the power of the second supercapacitor is used to power the fire extinguisher starting circuit; if the second supercapacitor is in a low-power state when the fire extinguisher is started, the power of the external power supply is used through the second charging circuit; The first supercapacitor is a first independent starting power supply, and the second supercapacitor is a second independent starting power supply; When powered by the first supercapacitor, the temperature sensor and the start-up logic circuit continue to work with micro-power consumption; the temperature sensor is used to sense the ambient temperature, and the temperature information is used as a judgment condition for the "start" of the fire extinguisher. The fire extinguisher start-up feedback circuit is used to provide a "fire extinguisher starts normally" signal, which is used as a judgment condition for the "stop" of the fire extinguisher start-up circuit; when the start-up logic circuit receives the "normal start" signal provided by the fire extinguisher start-up feedback circuit, it is determined that the fire extinguisher has started normally, and the start-up logic circuit turns off the fire extinguisher start-up circuit, that is, stops supplying power to the fire extinguisher start-up resistor.

2. The fire extinguisher activation device according to claim 1, characterized in that: The independent starting power supply is one of a super capacitor, a rechargeable battery, and a non-rechargeable battery.

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