CN201232854Y - Household fuel gas leakage multiaspect control device - Google Patents

Abstract

The utility model discloses a multidirectional controller for household fuel gas leakage, which belongs to a coal gas leakage alarm controller. The controller comprises a processing unit, a gas sensor connected with the input port of the CPU and used for detecting the leakage of coal gas, an alarming air exhaust device connected with the output port of the central processor and an alarming and gas valve closing device. The controller further comprises a smoke detector used for detecting smoke resulting from smoldering fire or fire in kitchens, and a flame sensor. The smoke detector and the flame sensor are connected with the input port of the CPU. The utility model has the advantages that whether the coal gas leaks or smoke and flame occurs because of smoldering fire or fire, the controller can effectively detect the smoke and the flame and give an alarm effectively, thus improving the safety.

Description

Multi-direction control device for household gas leakage

technical field

The utility model relates to a gas leakage alarm control device, in particular to a multi-directional control device for household gas leakage.

Background technique

The gas contains CO, CO2, N2, H2, CH4, CN, C2H4 and other toxic and flammable gases. When the gas causes a fire, it will produce a lot of smoke and heat, which will make the temperature of the upper space of the kitchen higher than that of the lower part (USA The fire-fighting organization finds when doing fire-fighting experiments that what burns fast is not the ignited solid combustibles, but the combustible gas emitted by the ignited solid combustibles). Existing gas leakage alarm generally only adopts CO sensor to detect whether there is gas leakage and reports to the police. Published patents include: alarm exhaust device, alarm and closing valve device, exhaust device. However, the information detection is single, that is, only the CO sensor is used to detect whether there is a gas leak. Gas self-leakage, to reach a certain concentration, until burning requires certain conditions, a certain process, and a certain amount of time. But once the gas catches fire, the local temperature in the room will rise sharply, and the temperature in the room will not be balanced. Therefore, it is obviously unreliable to detect with a single detector.

Contents of the invention

The purpose of this utility model is to provide a multi-directional control device for household gas leakage, which is equipped with a multi-directional detection unit, which can effectively detect and alarm whether it is gas leakage or smoke and flames produced by dark fire or fire in the kitchen. Make security higher.

The utility model is achieved through the following technical solutions: a multiple control device for household gas leakage, including a processor, a gas sensor connected to the input port of the central processing unit for detecting gas leakage, and a gas sensor connected to the central processing unit An alarm device connected to the output port; a smoke sensor and a flame sensor for detecting smoke generated by a dark fire or a fire in the kitchen are also provided; the smoke sensor and the flame sensor are connected with the input port of the central processing unit.

The beneficial effect of the wooden utility model is that whether it is a gas leak or smoke and flames produced by a dark fire or a fire in the kitchen, it can effectively detect and alarm. Make security higher. This is of great significance to maintaining family stability, protecting the personal safety and property safety of families and neighbors.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail.

Fig. 1 is the electric principle block diagram of the present utility model;

Fig. 2 is a circuit diagram of the utility model;

Figure 3 is a flow chart of the system.

In the figure: 1. Smoke sensor, 2. Flame sensor, 3. Gas sensor, 4. Single-chip microcomputer, 9. Exhaust air control drive circuit, 10. Gas cutting control drive circuit, 11. Water spray control drive circuit, 12 1. Door switch control drive circuit, 13. Exhaust fan; 14. Gas valve control solenoid valve, 15 Water spray control solenoid valve, 16. Door switch drive motor.

Detailed ways

As shown in Figure 1, in order to realize multi-level, multi-process and multi-parameter detection, the utility model is designed to utilize multiple detectors for multi-channel detection and comprehensive alarm. The gas sensor 3 is used on the way to detect CO in the gas. When CO (or gas) reaches a certain concentration, the detection circuit will work, and finally drive the exhaust fan, alarm, close the gas valve, and close the kitchen door to achieve gas exhaust. Empty, isolation, and alarm purposes. If there is smoke or fire in the kitchen due to overcast fire, use the signal detected by smoke sensor 1 or flame sensor 2 to drive the water spray device to spray water to reduce the temperature in the room, absorb harmful gases, and also drive the exhaust fan , call the police, turn off the gas valve, close the kitchen door, implement self-rescue or delay the spread of the accident, and wait for rescue. Flame sensor 2 is a compensation circuit set up to prevent gas sensor and smoke sensor from malfunctioning, so as to increase the stability and reliability of the control circuit. The gas sensor, the smoke sensor and the flame sensor are connected with the input ports of the central processing unit.

As shown in Figure 2, the central processing unit adopts the single-chip microcomputer AT89S52, and the program shown in Figure 3 is stored in the single-chip microcomputer AT89S52.

The gas sensor 3 uses the SF-2000-S carbon monoxide sensor to detect carbon monoxide in the air. SF-2000-S sensor has the advantages of large measurement range, high sensitivity, wide temperature adaptability range, long working life and small signal drift. Measuring range: 0～2000ppm Maximum load: 4000ppm, resolution: 1ppm, temperature range: -20℃～40℃, response time: <40sec, humidity range: 15%～90%.

Smoke sensor 1 adopts NIS-09C ion smoke sensor (americium element 241, 33.3KBq). NIS-09C sensor has the advantages of low working voltage, wide temperature adaptability range, large measuring gas concentration range and high sensitivity. Compared with the photoelectric smoke sensor, the ion smoke sensor has a small false alarm rate and is easier to control.

The flame sensor uses the ultraviolet sensor R2868 (C3704), which uses the ultraviolet rays in the flame to detect the flame, and has no response to visible light at all. It can detect 185 to 260 different narrow light-sensitive sources, and can accurately detect the light emitted from the flame. The weak ultraviolet light, long detection distance and high precision can accurately detect Mars at the moment of its formation.

In order to eliminate disasters in time when an accident occurs, a sprinkler control alarm device and a gas isolation control alarm device when a fire breaks out are also provided in the present embodiment. Because it is not the gist of the present invention, it will not be described in detail.

The control process and principle are: when the CO (or gas) reaches a certain concentration, the gas detection circuit works, and the signal is transmitted to the 5th pin of the single-chip microcomputer. Wind control drive circuit 9 drives exhaust fan 13 and alarm work, and gas cuts off control drive circuit 10 and closes gas valve and kitchen door simultaneously, in order to prevent gas from diffusing to other rooms. In order to achieve the purpose of gas emptying, isolation and alarm. If there is smoke or fire in the kitchen due to overcast fire, the smoke or flame sensor will send signals to pins 5, 6, and 7 of the single-chip microcomputer. After processing by the single-chip microcomputer AT89S52, pins 21, 22, 23, and 24 of the single-chip microcomputer will have drive signal output. . The water spraying control drive circuit 11 drives the exhaust fan and reports to the police, the gas valve control solenoid valve 14, the water spray control solenoid valve 15 and the door switch drive motor 16 simultaneously close the gas valve, close the kitchen door and spray water. To absorb smoke, lower the temperature, implement self-rescue or delay the spread of the accident, and wait for rescue. In order to prevent the gas sensor and smoke sensor from malfunctioning, the (flame) ultraviolet detector is an added compensation circuit to increase the stability and reliability of the control circuit.

For the convenience of future use, two function expansion interfaces are added to the circuit, and the user can connect the alarm.

Claims (2)

1. A multidirectional control device for household gas leakage, comprising a processor, a gas sensor connected to the input port of the central processing unit for detecting gas leakage, and an alarm exhaust device connected to the output port of the central processing unit, The alarm and gas valve closing device is characterized in that it is also provided with a smoke sensor and a flame sensor for detecting smoke generated by a dark fire or a fire in the kitchen; the smoke sensor and the flame sensor are connected with the input port of the central processing unit. 2. The multi-directional control device for household gas leakage according to claim 1, characterized in that the central processor adopts a single-chip microcomputer, the gas sensor is connected to the PI.5 pin of the single-chip microcomputer, and the smoke sensor is connected to the PI.7 pin of the single-chip microcomputer. The flame sensor is connected to the PI.6 pin of the single-chip microcomputer; the 21, 22, 23, and 24 pins of the single-chip microcomputer are respectively connected to the corresponding alarm driving circuit.

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