CN219574926U - Electrical fire monitoring device - Google Patents
Electrical fire monitoring device Download PDFInfo
- Publication number
- CN219574926U CN219574926U CN202320425948.6U CN202320425948U CN219574926U CN 219574926 U CN219574926 U CN 219574926U CN 202320425948 U CN202320425948 U CN 202320425948U CN 219574926 U CN219574926 U CN 219574926U
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- CN
- China
- Prior art keywords
- resistor
- ultraviolet light
- bending channel
- smoke sensor
- monitoring device
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The utility model discloses an electric fire monitoring device, which comprises a smoke sensor, an infrared thermometer, an MCU and an alarm module, wherein the smoke sensor comprises a shell and a tray body which is positioned on the shell and is provided with a bending channel, the top surfaces at two ends of the bending channel are closed, and the top surface of the middle part of the bending channel is open; the ultraviolet light source and the ultraviolet light sensitive resistor are respectively arranged at the two ends of the bending channel; a light source driving circuit and a receiving feedback circuit are arranged in the shell; the smoke sensor and the infrared thermometer are connected to the MCU, and the MCU is connected to the alarm module. The utility model adopts the infrared thermometer to monitor the temperature, can remotely measure infrared radiation, can timely monitor the temperature at the early stage of the occurrence of a flame, and the main principle of the smoke sensor is that the smoke sensor can increase the diffuse reflection of light, can reduce the influence of visible light by adopting ultraviolet light, improves the monitoring capability of electric fire, and can discover the fire as early as possible at lower concentration.
Description
Technical Field
The utility model relates to the technical field of fire monitoring, in particular to an electric fire monitoring device.
Background
In an electrical system, the fire switch cabinet and other internal parts of an electrical control cabinet are most connected due to the fact that the number of integrated electrical equipment is large, so that sparks are easy to generate to cause accidents, the existing internal fire monitoring of the electrical control cabinet is mainly carried out through a temperature sensor and a smoke sensor, the temperature sensor and the existing ionic smoke sensor are generally triggered to a certain extent due to the fact that the temperature and the smoke concentration are required to be increased and the like before the fire occurs due to the electrical specificity, and the temperature sensor and the existing ionic smoke sensor cannot be found in time at the initial stage of the fire.
Disclosure of Invention
The utility model aims to solve the technical problem of providing an electric fire monitoring device which can timely monitor the disaster condition inside electric equipment in the early stage of fire.
In order to solve the technical problems, the technical scheme of the utility model is as follows:
the electric fire monitoring device comprises a smoke sensor, an infrared thermometer, an MCU and an alarm module, wherein the smoke sensor comprises a shell and a tray body which is positioned on the shell and provided with a bending channel, the top surfaces at two ends of the bending channel are closed, and the top surface of the middle part of the bending channel is open; the ultraviolet light source and the ultraviolet light sensitive resistor are respectively arranged at the two ends of the bending channel; a light source driving circuit and a receiving feedback circuit are arranged in the shell; the smoke sensor and the infrared thermometer are connected to the MCU, and the MCU is connected to the alarm module.
Further, the bending channel is circular, and the installation directions of the ultraviolet light source and the ultraviolet light resistor are tangential to the two ends of the bending channel respectively.
Further, the top of the tray body is provided with a detachable fan-shaped cover plate, and the top surfaces of the two ends of the bending channel are covered after the fan-shaped cover plate is installed.
Further, the ultraviolet light-sensitive resistor adopts a cadmium sulfide or cadmium selenide light-sensitive resistor.
Further, the receiving feedback circuit comprises a first loop and a second loop which are connected in parallel, the first loop is sequentially connected with a resistor R1 and a photoresistor in series, the second loop is sequentially connected with a resistor R2, a resistor R3 and a triode in series, a conducting wire is connected between the resistor R1 and the photoresistor to the collector electrode of the triode, and a signal feedback circuit is led out between the resistor R2 and the resistor R3 to the MCU.
Further, the resistor R1 adopts a knob type adjustable resistor, and a knob part of the resistor leaks out of the housing of the smoke sensor.
The utility model adopts the infrared thermometer to monitor the temperature, the infrared thermometer can remotely measure infrared radiation, the infrared radiation can be timely monitored at the early stage of the occurrence of a flame, and the main principle of the smoke sensor is that the smoke can be used for increasing the diffuse reflection of light, and the ultraviolet light can reduce the influence of visible light, improve the monitoring capability of electric fire and discover the fire as early as possible under lower concentration.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic diagram of a smoke sensor;
FIG. 3 is a schematic diagram of a smoke sensor;
FIG. 4 is a schematic diagram III of a smoke sensor;
fig. 5 is a diagram of a receive feedback circuit.
In the figure, 1-smoke sensor, 11-shell, 111-knob, 12-disk, 121-curved channel, 13-ultraviolet light source, 14-ultraviolet light resistor, 15-sector cover plate.
Detailed Description
The following describes the embodiments of the present utility model further with reference to the drawings. The description of these embodiments is provided to assist understanding of the present utility model, but is not intended to limit the present utility model. In addition, the technical features of the embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.
As shown in figures 1-5:
the electric fire monitoring device comprises a smoke sensor 1, an infrared thermometer, an MCU and an alarm module, wherein the smoke sensor 1 comprises a shell 11 and a tray 12 which is positioned on the shell 11 and provided with a bending channel 121, the top surfaces at two ends of the bending channel 121 are closed, and the top surface of the middle part of the bending channel is open; an ultraviolet light source 13 and an ultraviolet light sensitive resistor 14 are respectively arranged at two ends of the curved channel 121; a light source driving circuit (in the prior art, not described in detail) and a receiving feedback circuit are installed in the housing 11; the smoke sensor 1 and the infrared thermometer are both connected to an MCU, and the MCU is connected to an alarm module (MCU is also called micro control unit, single chip microcomputer, model PIC16F877A can be selected).
Working principle: the utility model is mainly used for monitoring fire in electrical equipment, such as an electric cabinet and the like, and mainly monitors temperature and smoke in two modes, wherein the temperature abandons a temperature sensor and adopts an infrared thermometer, because the temperature sensor needs to be in contact measurement, that is to say, after a fire disaster occurs to a certain extent, the internal temperature is increased to be measured, the infrared thermometer can remotely measure infrared radiation, the infrared radiation can be timely monitored at the early stage of the occurrence of the fire, and the infrared signal of the fire is very strong and can be far greater than the normal heat radiation in the equipment.
Regarding the measurement of smoke, the utility model designs a novel sensor, and the main principle is that the diffuse reflection of light can be increased by using the smoke. The ultraviolet light source 13 and the ultraviolet light resistor 14 are respectively arranged at two ends of the curved channel 121, the diffuse reflection intensity of ultraviolet light emitted by the ultraviolet light source 13 is low under the air, so that the resistance change of the ultraviolet light resistor 14 is small, once smoke is generated, the smoke enters the curved channel 121, the diffuse reflection effect can increase the propagation intensity of the ultraviolet light along the curved channel 121, so that the resistance of the ultraviolet light resistor 14 is increased, after being processed by a receiving feedback circuit, a feedback signal is input for an MCU, and the MCU starts an alarm module to remind workers after receiving the feedback signal of the infrared thermometer or the smoke sensor 1.
As an optimized scheme, the curved channel 121 is in a circular ring shape, and the mounting directions of the ultraviolet light source 13 and the ultraviolet light resistor 14 are tangential to the two ends of the curved channel 121 respectively, so that the influence of the ultraviolet light source 13 on the ultraviolet light resistor 14 can be well blocked, and ultraviolet light can be smoothly irradiated to the ultraviolet light resistor 14 in a diffuse reflection mode when smoke is generated (the ultraviolet light resistor 14 adopts cadmium sulfide or cadmium selenide photoresistor and is sensitive to ultraviolet light reaction and not influenced by visible light).
As an optimized scheme, the top of the tray body 12 is provided with a detachable fan-shaped cover plate 15, and the fan-shaped cover plate 15 shields the top surfaces at two ends of the curved channel 121 after being installed, so that the ultraviolet light source 13 and the ultraviolet light resistor 14 are convenient to maintain and install.
As an optimized scheme, the receiving feedback circuit comprises a first loop and a second loop which are connected in parallel, the first loop is sequentially connected with a resistor R1 and a photoresistor in series, the second loop is sequentially connected with a resistor R2, a resistor R3 and a triode in series, a wire is connected between the resistor R1 and the photoresistor to the collector of the triode, and a signal feedback circuit is led out between the resistor R2 and the resistor R3 to the MCU.
As an optimized scheme, the resistor R1 adopts a knob type adjustable resistor, and the knob 111 part of the resistor leaks out of the shell 11 of the smoke sensor 1, so that the sensitivity of the voltage at two ends of the photoresistor to ultraviolet light change can be adjusted through adjusting the resistor R1 to offset the ultraviolet light influence existing in nature (the larger the resistor R1 is, the larger the illumination intensity of the photoresistor reaching the required conducting voltage of the triode is, and the smaller the conversely is).
The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings, but the present utility model is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the utility model, and yet fall within the scope of the utility model.
Claims (6)
1. An electrical fire monitoring device, characterized in that: the smoke sensor comprises a shell and a tray body which is positioned on the shell and provided with a bending channel, wherein the top surfaces of two ends of the bending channel are closed, and the top surface of the middle part of the bending channel is open; the ultraviolet light source and the ultraviolet light sensitive resistor are respectively arranged at the two ends of the bending channel; a light source driving circuit and a receiving feedback circuit are arranged in the shell; the smoke sensor and the infrared thermometer are connected to the MCU, and the MCU is connected to the alarm module.
2. An electrical fire monitoring device as claimed in claim 1, wherein: the bending channel is circular, and the installation directions of the ultraviolet light source and the ultraviolet light resistor are tangential to the two ends of the bending channel respectively.
3. An electrical fire monitoring device as claimed in claim 2, wherein: the top of the tray body is provided with a detachable fan-shaped cover plate, and the top surfaces of the two ends of the bending channel are covered after the fan-shaped cover plate is installed.
4. An electrical fire monitoring device as claimed in claim 1, wherein: the ultraviolet light-sensitive resistor adopts a cadmium sulfide or cadmium selenide light-sensitive resistor.
5. An electrical fire monitoring device as claimed in claim 1, wherein: the receiving feedback circuit comprises a first loop and a second loop which are connected in parallel, wherein the first loop is sequentially connected with a resistor R1 and a photoresistor in series, the second loop is sequentially connected with a resistor R2, a resistor R3 and a triode in series, a conducting wire is connected between the resistor R1 and the photoresistor to the collector of the triode, and a signal feedback circuit is led out between the resistor R2 and the resistor R3 to the MCU.
6. An electrical fire monitoring device as claimed in claim 5, wherein: the resistor R1 adopts a knob type adjustable resistor, and a knob part of the resistor leaks out of the shell of the smoke sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320425948.6U CN219574926U (en) | 2023-03-09 | 2023-03-09 | Electrical fire monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320425948.6U CN219574926U (en) | 2023-03-09 | 2023-03-09 | Electrical fire monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219574926U true CN219574926U (en) | 2023-08-22 |
Family
ID=87648715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320425948.6U Active CN219574926U (en) | 2023-03-09 | 2023-03-09 | Electrical fire monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219574926U (en) |
-
2023
- 2023-03-09 CN CN202320425948.6U patent/CN219574926U/en active Active
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