CN2139232Y - Fully automatic circuit apparatus for fume extractor - Google Patents
Fully automatic circuit apparatus for fume extractor Download PDFInfo
- Publication number
- CN2139232Y CN2139232Y CN 92208362 CN92208362U CN2139232Y CN 2139232 Y CN2139232 Y CN 2139232Y CN 92208362 CN92208362 CN 92208362 CN 92208362 U CN92208362 U CN 92208362U CN 2139232 Y CN2139232 Y CN 2139232Y
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- China
- Prior art keywords
- gas
- circuit
- utility
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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.)
- Expired - Lifetime
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- 239000003517 fume Substances 0.000 title abstract description 6
- 239000000779 smoke Substances 0.000 claims description 19
- 239000007789 gas Substances 0.000 abstract description 68
- 239000003034 coal gas Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 229910001374 Invar Inorganic materials 0.000 description 1
- 241000593989 Scardinius erythrophthalmus Species 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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Abstract
The utility model relates to a full-automatic circuit apparatus for fume extractors, which is composed of a reference voltage generator, a gas sensor, a comparator circuit, a valve control circuit and sound alarm circuit which are connected. The utility model is arranged in a fume extractor, and a gas sensor is arranged at a low part of a position where gas leaks easily; when the gas concentration in the air rises to 2000PPM, the utility model starts a motor to exhaust the gas, simultaneously, the utility model makes sound and light alarm to cut off the gas supply to ensure the safety; when the gas concentration reduces below 2000PPM, a green lamp is lighted, the motor stops, a safety valve is opened, and each component is normal. The utility model can also be arranged on other air exhausting devices.
Description
When a kind of full-automatic circuit device of smoke exhaust, this device can gas density reach 2000PPM in air, start smoke exhaust automatically and drive acoustic-optic alarm, can control the gas safety valve simultaneously, cut off the gas supply of gas pipeline, guarantee safety.
At present, general smoke exhaust is to use the staff pushbutton enable.In case of indoor unmanned, gas (coal gas) leaks, and gas density raises in the air, and smoke exhaust can not start exhaust voluntarily, and this is breakneck.Find to start smoke exhaust in a great rush when dense as the people, usually ignite dense gas, cause casualty accident because of the startup of motor.Though existing all fire alarms can adopt, it can only give the alarm, and can not start smoke exhaust ahead of time, if unmanned in the family, after this alarm is sent, also of no avail.When therefore being badly in need of solving the gas density rising, the automatically actuated problem of smoke exhaust.
The purpose of this utility model is, be equipped with a kind of full-automatic circuit device of smoke exhaust to smoke exhaust, when gas density rises to 2000PPM in the surrounding air, can start smoke exhaust automatically, gas is discharged outdoor, drive acoustic-optic alarm simultaneously and give the alarm.Can also drive a gas safety valve in addition, cut off gas pipeline, make gas no longer continue to release, guarantee safety.
The utility model is to realize like this.Full-automatic circuit device of installing in the kitchen ventilator body, it is by the difference of gas inductor according to gas density in the air, the output varying voltage signal is to the comparison circuit of resistance and operational amplifier composition, with diode, electric capacity, resistance and operational amplifier, the signal that the reference voltage generator of forming produces is compared, when output voltage is higher than normal voltage, the valve controling circuit of being made up of diode, triode, electric capacity, operational amplifier and resistance will drive gas safety valve cut-out gas; The delay circuit trigger that while is made up of electric capacity, operational amplifier and resistance, red light is bright, and one road signal is reported to the police the sound light alarming circuit of being made up of triode, resistance and alarm, and another road signal makes relay closes, motor rotation.The gas inductor can be contained in outside the smoke exhaust, pulls out the lower position that is installed in gas pipe Louis leak with on line.
Description of drawings:
Fig. 1 is the utility model schematic diagram;
Fig. 2 is the operation principle calcspar of this full-automatic circuit device;
Fig. 3 is a circuit diagram of the present utility model.
Sequence number explanation in the accompanying drawing:
1-surveys circuit for alarming;
The 2-smoke exhaust;
3-gas safety valve;
The 11-reference voltage generator;
12-gas inductor;
The 13-comparison circuit;
The 14-valve controling circuit;
The 15-delay circuit;
16-audio alarm circuit;
The 21-power switch;
The 22-motor;
121-gas inductor;
The 131-operational amplifier;
The 151-relay.
Below by embodiment, in conjunction with the accompanying drawings, the utility model is described further.The detection circuit for alarming 1 of the utility model is contained in the kitchen ventilator body.Gas inductor 12 can be contained in outside the body hangingly, is installed in the lower position near near coal gas (gas) cooking stove or leakiness gas pipeline place.Because the proportion of gas is bigger than air, the gas density of lower is big, finds so early, reports to the police early.Survey power switch 21 relay 151 in parallel that circuit for alarming 1 one of control is contained in gas safety valve 3 on the gas pipeline and and the motor 22 of smoke exhaust.When gas inductor 12 had detected gas leakage, promptly when the gas density rising reached 2000PPM in the air, circuit 1 drove the gas safety valve immediately, made it cut off the interior gas supply of gas pipe, made gas no longer continue to release.The signal that gives the alarm simultaneously, the warning user.Circuit for alarming 1 drives relay 151 closures after 15 seconds, starts oil-fume extractor motor 22, gas is discharged outdoor.In the time-delay process in this 15 second, just before the gas safety valve cut out, so that the gas that releases is spread, gas density was fallen slightly, and unlikely actuation gas is guaranteed safety when guaranteeing electric motor starting.
The power supply of this full-automatic circuit device is in parallel with the power supply of the motor 22 of smoke exhaust, exports low-voltage DC behind rectifying and voltage-stabilizing.Gas inductor 12 changes according to gas density near the air it and changes the internal resistance value of self, thereby produces different voltage output signals, promptly is that gas density changes the variation that is converted into magnitude of voltage.This output signal is delivered to the electrode input end of an operational amplifier 131.This operational amplifier 131 constitutes a comparison circuit 13 with several resistance.Reference voltage generator 11 is connected with the negative pole of the operational amplifier 131 of comparison circuit 13.The reference voltage that this reference voltage generator 11 is sent is in succession to the negative input of operational amplifier 131.When gas density rises to 2000PPM near the air gas inductor, its output voltage will become and be higher than normal voltage, the cathode voltage that is the operational amplifier 131 of comparison circuit 13 is higher than cathode voltage, its output is then exported a positive voltage, and this voltage output end is in parallel with valve controling circuit 14 and delay circuit 15 respectively.The valve controling circuit of being made up of an operational amplifier and several transistors, resistance, diode and electric capacity 14 can send out the output voltage of comparison circuit 13 big gas safety valve 3 of rear drive, cuts off the supply of gas in the gas pipeline.Meanwhile, delay circuit 15 triggers, and drive a red eye and ignite, an audio alarm circuit 16 sends audible alarm.Delay circuit 15 utilizes an operational amplifier and electric capacity, resistance, postpones after 15 seconds, and output signal drives relay 151 closures.The normal opened contact of relay 151 is in parallel with the power switch of the motor of smoke exhaust 22, and gas is got rid of in the starter motor running.Gas density drops to 2000PPM when following, and above-mentioned all alarms all stop, and a green light ignites simultaneously, and expression has entered safe condition.
The utility model is selected the gas density of 2000PPM as circuit operation, starter motor, and smoke exhaust is started working.General national Specification, it is 17000PPM that gas is ignited concentration.As seen, it is very big that 2000PPM and 17000PPM differ, can be because of the startup actuation gas of motor.Gas inductor 12 can be installed in lower, and this proportion of invar is bigger than air, can find gas leakage early like this.After the gas safety valve is driven, cut off the supply of gas in the gas pipeline, after 15 seconds, motor is just started, and in this time course, the gas that releases is spread, the safety when guaranteeing electric motor starting.
The normal opened contact of the relay 151 of this full-automatic circuit device is in parallel with the power switch 21 of oil-fume extractor motor 2, and at ordinary times, smoke exhaust can operate as normal.The utility model also can be installed on exhaust blower or other exhaust equipment, all can guarantee the safety when gas leaks.
Claims (2)
1, a kind of full-automatic circuit device of smoke exhaust is characterized in that the gas inductor (12) of exportable unlike signal is connected with the input negative pole that the output of reference voltage generator (11) is received comparison circuit (13) respectively, carries out signal relatively; Output of comparison circuit connects one when output voltage is higher than normal voltage, can drive the valve controling circuit (14) that gas safety valve (3) cuts off gas, simultaneously another output of comparison circuit (13) is electrically connected with delay circuit (15) again, and the output of delay circuit (15) is connected to the relay (151) of controlling motor rotation respectively and is connected sound light alarming circuit (14).
2, by the full-automatic circuit device of the described a kind of smoke exhaust of claim 1, it is characterized in that: this device is installed in the kitchen ventilator body, and the gas inductor is contained in the lower position of gas pipe Louis leak.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92208362 CN2139232Y (en) | 1992-05-04 | 1992-05-04 | Fully automatic circuit apparatus for fume extractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92208362 CN2139232Y (en) | 1992-05-04 | 1992-05-04 | Fully automatic circuit apparatus for fume extractor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2139232Y true CN2139232Y (en) | 1993-07-28 |
Family
ID=33762429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92208362 Expired - Lifetime CN2139232Y (en) | 1992-05-04 | 1992-05-04 | Fully automatic circuit apparatus for fume extractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2139232Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101382303B (en) * | 2007-09-07 | 2011-09-21 | 海尔集团公司 | Anti-dry burning control device for household gas stove |
| EP2749818A3 (en) * | 2012-12-26 | 2016-10-12 | BSH Hausgeräte GmbH | Range hood and control method thereof |
-
1992
- 1992-05-04 CN CN 92208362 patent/CN2139232Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101382303B (en) * | 2007-09-07 | 2011-09-21 | 海尔集团公司 | Anti-dry burning control device for household gas stove |
| EP2749818A3 (en) * | 2012-12-26 | 2016-10-12 | BSH Hausgeräte GmbH | Range hood and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |