CN204288453U

CN204288453U - Combustible gas leakage smoke alarm unit

Info

Publication number: CN204288453U
Application number: CN201420858929.3U
Authority: CN
Inventors: 周芸
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-12-30
Filing date: 2014-12-30
Publication date: 2015-04-22
Anticipated expiration: 2024-12-30

Abstract

The utility model provides a kind of combustible gas leakage smoke alarm unit, and its feature comprises: 9V direct supply, Detection Circuit, multivibrator and audio output circuit.In order to solve or make up the defect that gas alarm device on the market exists, combustible gas leakage smoke alarm unit described in the utility model utilizes gas sensor as a kind of gas leakage alarming device of detecting element, it is applicable to the detection that the escaping gases such as rock gas, coal gas, gasoline, carbon monoxide, hydrogen, alkanes, alcohols leak, and the timely detection alarm of smog that can be formed fire such as timber, paper, cloth, woolen, rubber, plastic products and greases.

Description

Combustible gas leakage smoke alarm unit

Technical field

The utility model belongs to electronics and inflammable gas use safety technical field, is about a kind of combustible gas leakage smoke alarm unit.

Background technology

Most of resident using rock gas or oil liquefied gas to cook, cook, when boiling water, in the process of hotting plate, soup spill happens occasionally, this is easy to gas flame on kitchen range to put out, cause combustible gas leakage, once fail Timeliness coverage, likely lead to fire failure, likely cause any property loss or life threatening.

Fuel gas alarm majority sold on the market is mounted in above the lampblack absorber on kitchen range top, detect gas leakage and be confined in this very little region of kitchen range, and gas leakage just can detect to during finite concentration.

In order to solve or make up the defect that gas alarm device on the market exists, combustible gas leakage smoke alarm unit described in the utility model utilizes gas sensor as a kind of gas leakage alarming device of detecting element, it is applicable to the detection that the escaping gases such as rock gas, coal gas, gasoline, carbon monoxide, hydrogen, alkanes, alcohols leak, and the Smoke Detection that can be formed fire such as timber, paper, cloth, woolen, rubber, plastic products and greases is reported to the police.

Below describe the relevant technologies content that combustible gas leakage smoke alarm unit described in the utility model is involved in implementation process in detail.

Utility model content

Goal of the invention and beneficial effect: in order to solve or make up the defect that gas alarm device on the market exists, combustible gas leakage smoke alarm unit described in the utility model utilizes gas sensor as a kind of gas leakage alarming device of detecting element, it is applicable to the detection that the escaping gases such as rock gas, coal gas, gasoline, carbon monoxide, hydrogen, alkanes, alcohols leak, and the Smoke Detection that can be formed fire such as timber, paper, cloth, woolen, rubber, plastic products and greases is reported to the police.

Circuit working principle: combustible gas leakage smoke alarm unit is made up of 9V direct supply, gas sensor and multivibrator.9V direct supply is depressurized to about 5V DC voltage through resistance R1 and is supplied to gas sensor QM and uses.Detection Circuit is formed, for detecting inflammable gas with gas sensor QM-N5.When reaching certain concentration when the inflammable gass such as indoor carbon monoxide, hydrogen, alkanes, alcohols woolen, rubber, plastic products and grease or smog, gas sensor QM two interelectrode resistance values reduce rapidly, 4th pin of gas sensor QM and the 6th pin voltage are raised rapidly, also the rising of time base circuit IC1 the 4th pin (reset terminal) voltage is made, then the multivibrator that time base circuit IC1 and peripheral Resistor-Capacitor Unit thereof are formed is started working, and finally drives loudspeaker YS to send chimes of doom by time base circuit IC1 the 3rd pin output audio signal.

Technical scheme: combustible gas leakage smoke alarm unit, it comprises 9V direct supply, Detection Circuit, multivibrator and audio output circuit, it is characterized in that:

Detection Circuit: its gas sensor QM, resistance R1, resistance R2 and linear potentiometer RP1 forms, the model that gas sensor QM selects is QM-N5,1st pin of gas sensor QM and the 3rd pin connection circuit positive pole VCC, 2nd pin of gas sensor QM is by resistance R1 connection circuit positive pole VCC, 5th pin of gas sensor QM connects one end of linear potentiometer RP1,4th pin of the other end of linear potentiometer RP1 and movable end connection circuit ground GND, gas sensor QM and the 6th pin are by resistance R2 connection circuit ground GND;

Multivibrator and audio output circuit: it is by time base circuit IC1, resistance R3, electric capacity C1, electrochemical capacitor C2 and loudspeaker YS forms, the model that time base circuit IC1 selects is NE555, time base circuit IC1 the 8th pin connection circuit positive pole VCC, time base circuit IC1 the 4th pin connects the 4th pin and the 6th pin of gas sensor QM, time base circuit IC1 the 2nd pin and the 6th pin connecting resistance R3 one end and electric capacity C1 one end, resistance R3 other end connection circuit positive pole VCC, electric capacity C1 other end connection circuit ground GND, time base circuit IC1 the 1st pin connection circuit ground GND, time base circuit IC1 the 3rd pin connects electrochemical capacitor C2 positive pole, electrochemical capacitor C2 negative pole is by loudspeaker YS connection circuit ground GND,

9V DC power anode is connected with circuit anode VCC, and 9V DC power cathode is connected with circuit ground GND.

Accompanying drawing explanation

Fig. 1 is the embodiment circuit working schematic diagram that the utility model provides a combustible gas leakage smoke alarm unit.

Embodiment

According to combustible gas leakage smoke alarm unit circuit working schematic diagram shown in the drawings and accompanying drawing explanation, and according to annexation between components and parts in each several part circuit described in utility model content, and components and parts technical parameter described in embodiment requires and circuit production main points are carried out enforcement and can be realized the utility model, is further described correlation technique of the present utility model below in conjunction with embodiment.

The selection of components and parts and technical parameter

QM is gas sensor, and the model selected is QM-N5, or selects the models such as QM211;

IC1 is time base circuit, and the model selected is NE555 or LM555, and packing forms is dual inline type 8 pin; Each pin function: 1 pin is circuit ground GND; 2 pin are trigger end; 3 pin output terminals; 4 pin preset ends; 5 pin are control voltage; 6 pin thresholdings (threshold value); 7 pin are discharge end; 8 pin are positive source VCC;

RP1 is linear potentiometer, and the resistance of employing is 18 Ω, power is 1/2W solid potentiometer;

Resistance all uses metalfilmresistor, and the resistance of resistance R1 is 82 Ω, power is 1/2W; Resistance R2 resistance is 100K Ω; The resistance of resistance R3 is 47K Ω;

C1 is electric capacity of the dacron, and its capacity is 10nF (0.01 μ F);

C2 is electrochemical capacitor, and its capacity is 1000 μ F/16V;

YS is loudspeaker, can select diameter 2.5 inch or 3 inch, impedance is 8 Ω permanent magnet loudspeakers.

Circuit production main points and circuit debugging

Because the circuit structure of combustible gas leakage smoke alarm unit is fairly simple, as long as the electronic devices and components performance generally selected is intact, and the components and parts annexation to specifications in accompanying drawing is welded, physical connection line and welding quality are through carefully checking correctly, and circuit of the present utility model only needs to carry out simple debugging and can normally work;

When circuit debugging, no matter detect inflammable gas or for detecting smog alarm, all gas sensor QM can be put into certain density gas sample and detecting bottle or sample sack, adjustment linear potentiometer RP1 makes gas sensor QM be in criticality alarm state;

In order to detect combustible gas leakage, can to cover room wider, can according to inflammable gas character adjustment combustible gas leakage smoke alarm unit setting height(from bottom), if use rock gas or should higher position be placed in for detecting smog, if use oil liquefied gas suggestion to settle as far as possible lower position.

The outward appearance of circuit components layout of the present utility model, board design, combustible gas leakage smoke alarm unit and physical dimension etc. are not guardian techniques of the present utility model; neither the claimed technology contents of the utility model, therefore do not illustrate one by one in the description.

Claims

1. a combustible gas leakage smoke alarm unit, it comprises 9V direct supply, Detection Circuit, multivibrator and audio output circuit, it is characterized in that:

Described Detection Circuit is made up of gas sensor QM, resistance R1, resistance R2 and linear potentiometer RP1, the model that gas sensor QM selects is QM-N5,1st pin of gas sensor QM and the 3rd pin connection circuit positive pole VCC, 2nd pin of gas sensor QM is by resistance R1 connection circuit positive pole VCC, 5th pin of gas sensor QM connects one end of linear potentiometer RP1,4th pin of the other end of linear potentiometer RP1 and movable end connection circuit ground GND, gas sensor QM and the 6th pin are by resistance R2 connection circuit ground GND;

Described multivibrator and audio output circuit are by time base circuit IC1, resistance R3, electric capacity C1, electrochemical capacitor C2 and loudspeaker YS forms, the model that time base circuit IC1 selects is NE555, time base circuit IC1 the 8th pin connection circuit positive pole VCC, time base circuit IC1 the 4th pin connects QM the 4th pin and the 6th pin of gas sensor, time base circuit IC1 the 2nd pin and the 6th pin connecting resistance R3 one end and electric capacity C1 one end, resistance R3 other end connection circuit positive pole VCC, electric capacity C1 other end connection circuit ground GND, time base circuit IC1 the 1st pin connection circuit ground GND, time base circuit IC1 the 3rd pin connects electrochemical capacitor C2 positive pole, electrochemical capacitor C2 negative pole is by loudspeaker YS connection circuit ground GND,

Described 9V DC power anode is connected with circuit anode VCC, and 9V DC power cathode is connected with circuit ground GND.