CN115494121A - Gas monitoring system - Google Patents
Gas monitoring system Download PDFInfo
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- CN115494121A CN115494121A CN202211008788.1A CN202211008788A CN115494121A CN 115494121 A CN115494121 A CN 115494121A CN 202211008788 A CN202211008788 A CN 202211008788A CN 115494121 A CN115494121 A CN 115494121A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 22
- 238000011896 sensitive detection Methods 0.000 claims abstract description 24
- 239000003990 capacitor Substances 0.000 claims description 92
- 238000006243 chemical reaction Methods 0.000 claims description 42
- 238000004804 winding Methods 0.000 claims description 35
- 150000001450 anions Chemical class 0.000 claims description 24
- 150000002500 ions Chemical class 0.000 claims description 23
- 238000009423 ventilation Methods 0.000 claims description 22
- 230000001954 sterilising effect Effects 0.000 claims description 19
- 239000003381 stabilizer Substances 0.000 claims description 16
- 239000000919 ceramic Substances 0.000 claims description 15
- 238000009966 trimming Methods 0.000 claims description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 97
- 239000004065 semiconductor Substances 0.000 description 10
- 238000004659 sterilization and disinfection Methods 0.000 description 10
- 230000008859 change Effects 0.000 description 5
- 230000009467 reduction Effects 0.000 description 4
- 230000010355 oscillation Effects 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002070 germicidal effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002516 radical scavenger Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241001089723 Metaphycus omega Species 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 230000001678 irradiating effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/20—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation
- F24F8/22—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation using UV light
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/30—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by ionisation
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Biochemistry (AREA)
- Electrochemistry (AREA)
- Human Computer Interaction (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Fluid Mechanics (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The present disclosure provides a gas monitoring system, comprising: a gas-sensitive detection unit; the input end of the time-base integrated circuit is connected with the output end of the gas-sensitive detection unit; alarm unit, alarm unit's input links to each other with time base integrated circuit's output, and alarm unit includes: the input end of the relay is connected with the output end of the time base integrated circuit; and the input end of the protection unit is connected with the output end of the relay. In the gas monitoring system, the alarm unit is enabled to send out alarm information to remind an operator of overhigh gas concentration, so that the operator can process the gas in time, personal and property loss is avoided, the protection unit is enabled to act, the gas concentration is reduced, the gas concentration is always below the requirement, and the safety of production and life is guaranteed.
Description
Technical Field
The present disclosure relates to gas monitoring technologies, and particularly to a gas monitoring system.
Background
Smoke dust, harmful gas and the like with high concentration in the air have high harm to production equipment and operating personnel, so the sterilization and killing prevention work of the air is very important to production and life, at present, the smoke dust, the harmful gas and the like in the air are mostly sterilized and killed by a medicament spraying mode, but the mode has low efficiency and large loss, and the concentration change of the gas cannot be monitored, so that the sterilization and killing work cannot be carried out in time when the gas concentration exceeds the corresponding requirement, and the safety of production and life is influenced.
Disclosure of Invention
The present disclosure is directed to solving, at least to some extent, one of the technical problems in the related art.
To this end, it is an object of the present disclosure to provide a gas monitoring system.
To achieve the above object, the present disclosure provides a gas monitoring system, comprising: a gas-sensitive detection unit for converting a gas concentration into a level signal; the input end of the time-base integrated circuit is connected with the output end of the gas-sensitive detection unit, and the time-base integrated circuit is used for converting a low-level signal output by the gas-sensitive detection unit into a high-level signal; the input end of the alarm unit is connected with the output end of the time-base integrated circuit, the alarm unit is used for sending alarm information, and the alarm unit comprises: the input end of the relay is connected with the output end of the time base integrated circuit; and the input end of the protection unit is connected with the output end of the relay, and when the input end of the relay is a high-level signal, the protection unit is used for reducing the concentration of the gas.
Optionally, the protection unit includes: an alternating current power supply; the first end of the ventilation fan is connected with the first end of the alternating current power supply, and the second end of the ventilation fan is connected with the second end of the alternating current power supply; the first end of the ultraviolet killing unit is connected with the first end of the ventilation fan, and the second end of the ultraviolet killing unit is connected with the second end of the ventilation fan; wherein the relay includes: the first end of the first contact is connected with the first end of the alternating current power supply, the second end of the first contact is connected with the first end of the ventilation fan, the first contact is connected with the ventilation fan and the ultraviolet killing lamp tube in series, and when the input end of the relay is a high-level signal, the first contact is closed.
Optionally, the protection unit further includes: the first end of the alternating current-direct current conversion unit is connected with the first end of the alternating current power supply, and the second end of the alternating current-direct current conversion unit is connected with the second end of the alternating current power supply; the first end of the negative ion generator is connected with the third end of the alternating current-direct current conversion unit, the second end of the negative ion generator is connected with the fourth end of the alternating current-direct current conversion unit, and the second end of the negative ion generator is grounded; wherein, the relay still includes: and a first end of the second contact is connected with a third end of the alternating current-direct current conversion unit, a second end of the second contact is connected with a first end of the negative ion generator, the second contact is connected with the negative ion generator in series, and the second contact is closed when an input end of the relay is a high-level signal.
Optionally, the protection unit further includes: a first switch, a first end of which is connected with a first end of the alternating current power supply, a second end of which is connected with a first end of the ventilator, and the first switch is connected with the first contact in parallel; a first end of the second switch is connected with a third end of the alternating current-direct current conversion unit, a second end of the second switch is connected with a first end of the negative ion generator, and the second switch is connected with the second contact in parallel; the first end of the third switch is connected with the second end of the ventilator; the first end of the iron core inductor is connected with the second end of the third switch, the second end of the iron core inductor is connected with the second end of the ultraviolet sterilizing lamp tube, and the iron core inductor and the third switch are connected with the ultraviolet sterilizing lamp tube in series.
Optionally, the ac-dc conversion unit includes: a first transformer, a first end of a primary winding of the first transformer being connected to a first end of the alternating current power supply, a second end of the primary winding of the first transformer being connected to a second end of the alternating current power supply; the anode of the first diode is connected with the first end of the secondary side winding of the first transformer; the cathode of the second diode is connected with the cathode of the first diode and the first end of the second contact; a third diode, wherein the cathode of the third diode is connected with the anode of the first diode; and the anode of the fourth diode is connected with the anode of the third diode and the second end of the negative ion generator, and the cathode of the fourth diode is connected with the anode of the second diode and the second end of the secondary side winding of the first transformer.
Optionally, the ac-dc conversion unit further includes: a first end of the first capacitor is connected with the cathode of the second diode, and a second end of the first capacitor is connected with the anode of the fourth diode; the first end of the voltage stabilizer is connected with the first end of the first capacitor, and the second end of the voltage stabilizer is connected with the second end of the second capacitor; and the first end of the second capacitor is connected with the third end of the voltage stabilizer and the first end of the second contact, and the second end of the second capacitor is connected with the second end of the voltage stabilizer and the second end of the negative ion generator.
Optionally, the gas-sensitive detection unit includes: the first detection electrode of the gas sensor is connected with the third end of the AC-DC conversion unit, and the first heating electrode of the gas sensor is connected with the third end of the AC-DC conversion unit; a first end of the first resistor is connected with the second heating electrode of the gas sensor, and a second end of the first resistor is connected with the fourth end of the alternating current-direct current conversion unit; a first potentiometer, wherein a first end of the first potentiometer is connected with a second detection electrode of the gas sensor; a first end of the trimming resistor is connected with a second end of the first potentiometer, and a second end of the trimming resistor is connected with a second end of the first resistor; the anode of the fifth diode is connected with the third end of the first potentiometer; a first end of the third capacitor is connected with a cathode of the fifth diode, and a second end of the third capacitor is connected with a second end of the trimming resistor; the base electrode of the first triode is connected with the first end of the third capacitor, the emitting electrode of the first triode is connected with the second end of the third capacitor, and the collecting electrode of the first triode is connected with the input end of the time base integrated circuit; and a first end of the second resistor is connected with the first heating electrode of the gas-sensitive element, and a second end of the second resistor is connected with the collector electrode of the first triode.
Optionally, the second end of the time-base integrated circuit and the sixth end of the time-base integrated circuit are connected to the collector of the first triode, the fourth end of the time-base integrated circuit and the eighth end of the time-base integrated circuit are connected to the first end of the second resistor and the first end of the second contact, the first end of the time-base integrated circuit is connected to the second end of the third capacitor, the fifth end of the time-base integrated circuit is connected to the first end of the fourth capacitor, the second end of the fourth capacitor is connected to the first end of the time-base integrated circuit and the second end of the anion generator, and the third end of the time-base integrated circuit is connected to the input end of the anion generator.
Optionally, the alarm unit includes: a third resistor, a first end of the third resistor being connected to an eighth end of the time base integrated circuit; the anode of the first light-emitting diode is connected with the second end of the third resistor, and the cathode of the first light-emitting diode is connected with the third end of the time-base integrated circuit; a sixth diode, the relay further comprising: a first end of the coil is connected with a cathode of the first light emitting diode, a first end of the sixth diode is connected with a second end of the coil, and a second end of the sixth diode is connected with a third end of the time-base integrated circuit; the anode of the second light-emitting diode is connected with the second end of the coil, and the cathode of the second light-emitting diode is connected with the second end of the fourth capacitor; a first end of the fourth resistor is connected with the cathode of the first light-emitting diode; a first end of the second potentiometer is connected with a second end of the fourth resistor, and a third end of the second potentiometer is connected with a second end of the fourth resistor; the first end of the piezoelectric ceramic piece is connected with the second end of the second potentiometer, and the second end of the piezoelectric ceramic piece is connected with the cathode of the second light-emitting diode; a first end of the fifth resistor is connected with a first end of the third resistor; the emitter of the unijunction transistor is connected with the second end of the second potentiometer, the first base of the unijunction transistor is connected with the second end of the fifth resistor, and the second base of the unijunction transistor is connected with the second end of the piezoelectric ceramic plate.
Optionally, the negative ion generator includes: a first end of the fifth capacitor is connected with the second end of the second contact; the second triode is of an NPN type, a collector of the second triode is connected with the second end of the fifth capacitor, and an emitter of the second triode is connected with the second end of the second contact; a second end of the third potentiometer is connected with the emitter of the second triode, and a third end of the third potentiometer is connected with the emitter of the second triode; a first end of the sixth capacitor is connected with the first end of the third potentiometer, and a second end of the sixth capacitor is connected with the second base electrode of the unijunction transistor; a first end of a primary-side first winding of the second transformer is connected with a first end of the fifth capacitor, a second end of the primary-side first winding of the second transformer is connected with a second end of the fifth capacitor, a first end of a primary-side second winding of the second transformer is connected with a base of the second triode, a second end of a primary-side second winding of the second transformer is connected with a first end of the third potentiometer, a second end of a secondary-side winding of the second transformer is connected with a second end of the sixth capacitor, and a second end of a secondary-side winding of the second transformer is grounded; a cathode of the seventh diode is connected with a first end of a secondary side winding of the second transformer; a first end of the sixth resistor is connected with an anode of the seventh diode; and the input end of the discharge tip is connected with the second end of the sixth resistor.
The technical scheme provided by the disclosure can comprise the following beneficial effects:
when the gas concentration reaches a certain degree, the gas-sensitive detection unit detects the gas concentration and converts the gas concentration into a low level signal to be sent to the time-base integrated circuit, the time-base integrated circuit converts the received low level signal into a high level signal to be sent to the alarm unit, so that the alarm unit not only sends alarm information to remind an operator that the gas concentration is too high, the operator can process the gas in time to avoid personal and property loss, but also enables the protection unit to act to reduce the gas concentration, so that the gas concentration is always below the requirement, and the safety of production and life is ensured; the gas sterilization device has the advantages that through automatic operation of the gas-sensitive detection unit, the time-based integrated circuit and the protection unit, gas sterilization efficiency is high, loss is small, cost of gas sterilization is effectively reduced, gas sterilization can be carried out in time, and surrounding air is guaranteed to be always in a clean state.
Additional aspects and advantages of the disclosure will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the disclosure.
Drawings
The foregoing and/or additional aspects and advantages of the present disclosure will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic circuit diagram of a gas monitoring system according to an embodiment of the present disclosure;
FIG. 2 is a schematic circuit diagram of a gas monitoring system according to an embodiment of the present disclosure;
as shown in the figure: 1. the device comprises a gas-sensitive detection unit 2, a time-base integrated circuit 3, an alarm unit 4, an alternating current power supply 5, a ventilation fan 6, an ultraviolet killing lamp tube 7, an alternating current-direct current conversion unit 8 and an anion generator;
QM, a gas sensitive element, RP1, a first potentiometer, RP2, a second potentiometer, RP3, a third potentiometer, RT, a trimming resistor, R1, a first resistor, R2, a second resistor, R3, a third resistor, R4, a fourth resistor, R5, a fifth resistor, R6 and a sixth resistor;
c1, a first capacitor, C2, a second capacitor, C3, a third capacitor, C4, a fourth capacitor, C5, a fifth capacitor, C6 and a sixth capacitor;
d1, a first diode, D2, a second diode, D3, a third diode, D4, a fourth diode, D5, a fifth diode, D6, a sixth diode, D7, a seventh diode, VD1, a first light-emitting diode, VD2 and a second light-emitting diode;
q1, a first triode, Q2, a second triode, VT1 and a unijunction transistor;
K. a coil, K1, a first contact, K2, a second contact;
s1, a first switch, S2, a second switch, S3 and a third switch;
t1, a first transformer, T2 and a second transformer;
l, iron core inductance;
HTD and piezoelectric ceramic pieces.
Detailed Description
Reference will now be made in detail to the embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of illustrating the present disclosure and should not be construed as limiting the same. On the contrary, the embodiments of the disclosure include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
As shown in fig. 1, the embodiment of the present disclosure provides a gas monitoring system, which includes a gas-sensitive detection unit 1, a time-based integrated circuit 2, an alarm unit 3 and a protection unit, where the gas-sensitive detection unit 1 is configured to convert gas concentration into a level signal, an input end of the time-based integrated circuit 2 is connected to an output end of the gas-sensitive detection unit 1, the time-based integrated circuit 2 is configured to convert a low level signal output by the gas-sensitive detection unit 1 into a high level signal, an input end of the alarm unit 3 is connected to an output end of the time-based integrated circuit 2, the alarm unit 3 is configured to send alarm information, the alarm unit 3 includes a relay, an input end of the relay is connected to an output end of the time-based integrated circuit 2, an input end of the protection unit is connected to an output end of the relay, and when the input end of the relay is the high level signal, the protection unit is configured to reduce the concentration of gas.
It can be understood that, when the gas concentration reaches a certain degree, the gas-sensitive detection unit 1 detects the gas concentration and converts the gas concentration into a low level signal to be sent to the time-base integrated circuit 2, the time-base integrated circuit 2 converts the received low level signal into a high level signal to be sent to the alarm unit 3, so that the alarm unit 3 sends alarm information to remind an operator that the gas concentration is too high, the operator can process the gas in time to avoid personal and property loss, and the protection unit acts to reduce the gas concentration, so that the gas concentration is always below the requirement, and the safety of production and life is ensured;
the gas sterilization and disinfection device has the advantages that automatic operation of the gas-sensitive detection unit 1, the time-based integrated circuit 2 and the protection unit is adopted, so that gas sterilization and disinfection efficiency is high, loss is low, the cost of gas sterilization and disinfection is effectively reduced, gas sterilization and disinfection can be timely carried out, and surrounding air is guaranteed to be always in a clean state.
It should be noted that the gas monitoring system may be installed in an outdoor open space or an indoor closed space.
The specific type of the gas-sensitive detection unit 1 and the detected gas concentration threshold can be set according to the type of the detected gas, and is not limited herein, wherein the gas can be smoke, combustible gas, harmful gas, etc.
As shown in fig. 1 and 2, in some embodiments, the protection unit includes an ac power supply 4, an air exchange fan 5, and an ultraviolet killing lamp tube 6, a first end of the air exchange fan 5 is connected to a first end of the ac power supply 4, a second end of the air exchange fan 5 is connected to a second end of the ac power supply 4, the first end of the ultraviolet killing unit is connected to the first end of the air exchange fan 5, and the second end of the ultraviolet killing unit is connected to the second end of the air exchange fan 5;
wherein, the relay includes first contact K1, and the first end of first contact K1 links to each other with alternating current power supply 4's first end, and the second end of first contact K1 links to each other with the first end of scavenger fan 5, and first contact K1 and scavenger fan 5 and ultraviolet ray kill fluorescent tube 6 and establish ties, and when the input of relay was high level signal, first contact K1 was closed.
It can be understood that the ac power source 4 supplies power to the ventilation fan 5 and the ultraviolet germicidal lamp 6, so that the ventilation fan 5 and the ultraviolet germicidal lamp 6 can operate. When the gas concentration reaches a certain degree, the time base integrated circuit 2 outputs a high level signal to close the first contact K1, so that the ventilating fan 5 and the ultraviolet killing lamp tube 6 run, the ventilating fan 5 enables air to flow for ventilation through air blowing, the ultraviolet killing lamp tube 6 sterilizes and sterilizes air through irradiating ultraviolet rays, and the gas concentration is reduced through the matching of the ventilating fan 5 and the ultraviolet killing lamp tube 6.
It should be noted that the specific types of the ventilation fan 5 and the ultraviolet sterilizing lamp 6 can be set according to actual needs, and are not limited herein.
The mounting positions of the ventilation fan 5 and the ultraviolet sterilizing lamp tube 6 can be set according to actual needs, but the ventilation fan 5 and the ultraviolet sterilizing lamp tube 6 are ensured to be in effective contact with air.
The ultraviolet sterilizing lamp tube 6 may be connected with a fluorescent lamp in parallel so as to indicate the switching of the ultraviolet sterilizing lamp tube 6 to the operator.
The specific voltage of the ac power supply 4 can be set according to actual needs, for example: 220V (zero) is adopted.
As shown in fig. 1 and fig. 2, in some embodiments, the protection unit further includes an ac-dc conversion unit 7 and an anion generator 8, a first end of the ac-dc conversion unit 7 is connected to a first end of the ac power source 4, a second end of the ac-dc conversion unit 7 is connected to a second end of the ac power source 4, a first end of the anion generator 8 is connected to a third end of the ac-dc conversion unit 7, a second end of the anion generator 8 is connected to a fourth end of the ac-dc conversion unit 7, and a second end of the anion generator 8 is grounded;
wherein, the relay still includes: second contact K2, the first end of second contact K2 links to each other with the third end of alternating current-direct current conversion unit 7, and the second end of second contact K2 links to each other with anion generator 8's first end, and second contact K2 and anion generator 8 establish ties, and when the input of relay was high level signal, second contact K2 was closed.
It is understood that the ac/dc converting unit 7 converts the ac power of the ac power source 4 into dc power and supplies power to the ionizer 8 to enable the operation of the ionizer 8. When gas concentration reaches a certain degree, time base integrated circuit 2 outputs high level signal for second contact K2 is closed, thereby makes anion generator 8 operation, and anion generator 8 makes air ionization a large amount of anions through discharging, thereby plays air-purifying, disinfects and the effect of neutralizing gas, and then realizes the reduction of gas concentration.
The alternating current-direct current conversion unit 7 can convert alternating current into direct current, and can be used by the gas-sensitive detection unit 1, the time-base integrated circuit 2, the alarm unit 3 and other devices.
It should be noted that the installation position of the anion generator 8 can be set according to actual needs, but it should be ensured that the anion generator 8 can effectively contact with air.
The specific voltage output by the ac-dc conversion unit 7 can be set according to actual needs, for example: 12V.
A relay is an electric control device, and is an electric appliance that causes a controlled amount to change in a predetermined step in an electric output circuit when a change in an input terminal meets a predetermined requirement. In the present embodiment, the first contact K1 and the second contact K2 serve as output terminals of the relay, and the coil K serves as an output terminal of the relay.
As shown in fig. 2, in some embodiments, the protection unit further includes a first switch S1, a second switch S2, a third switch S3, and an iron core inductor L, a first end of the first switch S1 is connected to a first end of the ac power supply 4, a second end of the first switch S1 is connected to a first end of the ventilation fan 5, the first switch S1 is connected in parallel to the first contact K1, a first end of the second switch S2 is connected to a third end of the ac-dc conversion unit 7, a second end of the second switch S2 is connected to a first end of the anion generator 8, the second switch S2 is connected in parallel to the second contact K2, a first end of the third switch S3 is connected to a second end of the ac-dc conversion unit 7, a first end of the iron core inductor L is connected to a second end of the ultraviolet killing lamp tube 6, and the iron core inductor L and the third switch S3 are connected in series to the ultraviolet killing lamp tube 6.
It can be understood that the first switch S1 is connected in parallel with the first contact K1, the second switch S2 is connected in parallel with the second contact K2, and the third switch S3 is connected in series with the first switch S1 and the first contact K1, so that the first contact K1 and the first switch S1 can both control the switching of the ventilation fan 5 and the ultraviolet sterilizing lamp tube 6, the second contact K2 and the second switch S2 can both control the switching of the negative ion generator 8, and the third switch S3 can control the switching of the ultraviolet sterilizing lamp tube 6, so that the ventilation fan 5, the ultraviolet sterilizing lamp tube 6 and the negative ion generator 8 can be automatically opened when the gas concentration is high, and can be independently opened when the gas concentration is low, thereby improving the overall flexibility and facilitating the use.
Wherein, the iron core inductor L plays the functions of balance, filtering and the like, so that the operation of the ultraviolet sterilizing lamp tube 6 is safer and more stable.
It should be noted that the specific types of the first switch S1, the second switch S2 and the third switch S3 can be set according to actual needs, and are not limited herein.
As shown in fig. 2, in some embodiments, the ac/dc conversion unit 7 includes a first transformer T1, a first diode D1, a second diode D2, a third diode D3, and a fourth diode D4, a first end of a primary winding of the first transformer T1 is connected to a first end of the ac power source 4, a second end of the primary winding of the first transformer T1 is connected to a second end of the ac power source 4, an anode of the first diode D1 is connected to a first end of a secondary winding of the first transformer T1, a cathode of the second diode D2 is connected to a cathode of the first diode D1 and a first end of the second contact K2, a cathode of the third diode D3 is connected to an anode of the first diode D1, an anode of the fourth diode D4 is connected to an anode of the third diode D3 and a second end of the negative ion generator 8, and a cathode of the fourth diode D4 is connected to an anode of the second diode D2 and a second end of the secondary winding of the first transformer T1.
It can be understood that the first transformer T1 converts the higher voltage output by the ac power supply 4 into a lower voltage that can satisfy the requirements of the gas-sensitive detection unit 1, the anion generator 8, and the like, and the rectifier bridge formed by the first diode D1, the second diode D2, the third diode D3, and the fourth diode D4 converts the ac power into the dc power, so as to satisfy the requirements of the gas-sensitive detection unit 1, the anion generator 8, and the like.
It should be noted that the diode includes an anode and a cathode, the conduction direction of the diode is the direction from the anode to the cathode, and the specific types of the first diode D1, the second diode D2, the third diode D3 and the fourth diode D4 can be set according to the actual needs, and are not limited herein.
The specific type of the first transformer T1 may be set according to actual needs, and is not limited herein.
As shown in fig. 2, in some embodiments, the ac-dc converting unit 7 further includes a first capacitor C1, a voltage stabilizer, and a second capacitor C2, a first end of the first capacitor C1 is connected to a cathode of the second diode D2, a second end of the first capacitor C1 is connected to an anode of the fourth diode D4, a first end of the voltage stabilizer is connected to the first end of the first capacitor C1, a second end of the voltage stabilizer is connected to a second end of the second capacitor C2, a first end of the second capacitor C2 is connected to a third end of the voltage stabilizer and a first end of the second contact K2, and a second end of the second capacitor C2 is connected to a second end of the voltage stabilizer and a second end of the negative ion generator 8.
It can be understood that the first capacitor C1, the voltage stabilizer and the second capacitor C2 play a role in voltage stabilization, so that after the first diode D1, the second diode D2, the third diode D3 and the fourth diode D4 convert the alternating current into the direct current, the voltage of the direct current is more stable, and stable operation of the gas-sensitive detection unit 1, the anion generator 8 and other devices is ensured.
The voltage regulator includes a voltage regulator circuit, a control circuit, a servo motor, and the like. When input voltage or load change, control circuit samples, compares, enlargies, then drives servo motor and rotates, makes the position change of voltage regulator carbon brush, through automatic adjustment coil K turn ratio to keep output voltage's stability, the concrete type of stabiliser can set up according to actual need, for example: the model of the voltage stabilizer is 7812.
The specific capacitance values of the first capacitor C1 and the second capacitor C2 can be set according to actual needs, for example: the capacitance value of the first capacitor C1 may be 470 muf and the capacitance value of the second capacitor C2 may be 220 muf.
A first end of a primary winding of the first transformer T1 serves as a first end of the ac-dc conversion unit 7, a second end of the primary winding of the first transformer T1 serves as a second end of the ac-dc conversion unit 7, a first end of the second capacitor C2 serves as a third end of the ac-dc conversion unit 7, and a second end of the second capacitor C2 serves as a fourth end of the ac-dc conversion unit 7.
As shown in fig. 2, in some embodiments, the gas sensing unit 1 includes a gas sensor QM, a first resistor R1, a first potentiometer RP1, a trimming resistor RT, a fifth diode D5, a third capacitor C3, a first transistor Q1 and a second resistor R2, a first detection electrode of the gas sensor QM is connected to a third end of the ac/dc conversion unit 7, a first heater electrode of the gas sensor QM is connected to a third end of the ac/dc conversion unit 7, a first end of the first resistor R1 is connected to a second heater electrode of the gas sensor QM, a second end of the first resistor R1 is connected to a fourth end of the ac/dc conversion unit 7, a first end of the first potentiometer RP1 is connected to a second detection electrode of the ac/dc conversion unit QM, a first end of the trimming resistor RT is connected to a second end of the first potentiometer RP1, the second end of the trimming resistor RT is connected with the second end of the first resistor R1, the anode of the fifth diode D5 is connected with the third end of the first potentiometer RP1, the first end of the third capacitor C3 is connected with the cathode of the fifth diode D5, the second end of the third capacitor C3 is connected with the second end of the trimming resistor RT, the first triode Q1 is NPN type, the base electrode of the first triode Q1 is connected with the first end of the third capacitor C3, the emitter electrode of the first triode Q1 is connected with the second end of the third capacitor C3, the collector electrode of the first triode Q1 is connected with the input end of the time base integrated circuit 2, the first end of the second resistor R2 is connected with the first heating electrode of the gas sensitive element QM, and the second end of the second resistor R2 is connected with the collector electrode of the first triode Q1.
It can be understood that the dc power output by the voltage regulator supplies power to the first heater electrode and the second heater electrode of the gas sensor QM, and when the gas concentration reaches a certain level, the conductivity between the first detection electrode and the second detection electrode of the gas sensor QM increases, so that the voltage of the second detection electrode of the gas sensor QM rises, and as the potential of the second detection electrode of the gas sensor QM rises, the voltage of the base electrode of the first triode Q1 rises until the first triode Q1 is in saturation conduction, so that the input end of the time base integrated circuit 2 is converted from a high level signal to a low level signal, thereby the alarm unit 3 alarms and the protection unit operates.
It should be noted that the gas sensor QM includes a first heater electrode, a second heater electrode, a first detector electrode and a second detector electrode, the first detector electrode may also be referred to as an a end of the gas sensor QM, and the second detector electrode may also be referred to as a B end of the gas sensor QM, and the specific type of the gas sensor QM may be set according to actual needs, for example: the model of the gas sensor QM is QM-N5.
The specific resistance values of the first resistor R1 and the second resistor R2 can be set according to actual needs, for example: the resistance value of the first resistor R1 may be 36 Ω, and the resistance value of the second resistor R2 may be 10k Ω.
The potentiometer includes a first end, a second end and a third end, and is generally composed of a resistor body and a movable brush, wherein the first end and the second end of the potentiometer are disposed at two ends of the resistor body, the third end of the potentiometer is disposed on the brush, and the brush moves along the resistor body to make the potentiometer obtain a resistance value in a certain relation with the displacement of the brush. The resistance value of the first potentiometer RP1 can be set according to actual needs, for example: the resistance value of the first potentiometer RP1 may be 2.2k Ω.
The specific resistance value of the trimming resistor RT may be set according to actual needs, for example: the resistance value of the trimming resistor RT may be 430 Ω.
The specific capacitance value of the third capacitor C3 can be set according to actual needs, for example: the capacitance value of the third capacitor C3 may be 10 μ F.
The first triode Q1 of NPN type includes two N (Negative) type semiconductors and a P (Positive) type semiconductor, and the P type semiconductor sets up between two N type semiconductors, and first triode Q1 includes Base (Base), emitter (Emitter) and Collector (Collector), and when first triode Q1 was in the off-state, disconnection between Emitter and the collecting electrode, when first triode Q1 was in the on-state, switched on between Emitter and the collecting electrode.
As shown in fig. 2, in some embodiments, the second terminal of the time base integrated circuit 2 and the sixth terminal of the time base integrated circuit 2 are connected to the collector of the first transistor Q1, the fourth terminal of the time base integrated circuit 2 and the eighth terminal of the time base integrated circuit 2 are connected to the first terminal of the second resistor R2 and the first terminal of the second contact K2, the first terminal of the time base integrated circuit 2 is connected to the second terminal of the third capacitor C3, the fifth terminal of the time base integrated circuit 2 is connected to the first terminal of the fourth capacitor C4, the second terminal of the fourth capacitor C4 is connected to the first terminal of the time base integrated circuit 2 and the second terminal of the anion generator 8, and the third terminal of the time base integrated circuit 2 is connected to the input terminal of the anion generator 8.
It can be understood that the first terminal of the time base integrated circuit 2 is connected to the second terminal of the third capacitor C3 to achieve grounding of the time base integrated circuit 2, the second terminal of the time base integrated circuit 2 and the sixth terminal of the time base integrated circuit 2 are connected to the collector of the first transistor Q1, so that after the first transistor Q1 is turned on in saturation, the second terminal and the sixth terminal of the time base integrated circuit 2 can be switched from high level to low level, the third terminal of the time base integrated circuit 2 is connected to the input terminal of the anion generator 8, so that when the second terminal and the sixth terminal of the time base integrated circuit 2 are switched from high level to low level, the third terminal of the time base integrated circuit 2 can output high level signals to the anion generator 8, thereby achieving alarm and reduction of gas concentration, the eighth terminal of the fourth terminal of the time base integrated circuit 2 is connected to the first terminal of the second resistor R2 and the first terminal of the second contact K2, so that the fourth terminal and the eighth terminal of the time base integrated circuit 2 are always in high level, the fifth terminal of the time base integrated circuit 2 is connected to the fifth terminal of the fourth capacitor C4, so that the time base integrated circuit 2 is grounded.
It should be noted that the time base integrated circuit 2 may be an NE555 chip, the NE555 chip includes a first end, a second end, a third end, a fourth end, a fifth end, a sixth end, a seventh end, and an eighth end, the first end is a ground end, the second end is a trigger end, which is used for triggering the NE555 chip to start its time period, the upper edge voltage of a trigger signal of the trigger end must be greater than 2/3VCC, the lower edge must be lower than 1/3VCC, the third end is an output end, when the time period starts, the output end moves to a high potential which is 1.7 volts less than the power voltage, when the period ends, the output of the output end returns to a low potential which is about 0 volts, the fourth end is a reset end, when a low logic potential is sent to the reset end, the timer is reset and the output end returns to a low potential, the fifth terminal is a control terminal which permits the trigger and gate voltage to be changed by external voltage, when the timer is in a stable or oscillating operation mode, the input of the control terminal can be used for changing or adjusting the output frequency, the sixth terminal is a reset locking terminal, when the voltage of the reset locking terminal is shifted from 1/3VCC voltage to above 2/3VCC voltage, the output terminal is in a low level state, the seventh terminal is a discharge terminal, the discharge terminal and the output terminal have the same current output capability, when the output terminal is in a low level, the discharge terminal is in a low resistance state to ground, when the output terminal is in a high level, the seventh terminal is in a high resistance state to ground, the eighth terminal is a positive power supply voltage terminal, and the supply voltage range of the positive power supply voltage terminal is 4.5V-16V.
The specific capacitance value of the fourth capacitor C4 can be set according to actual needs, for example: the capacitance value of the fourth capacitor C4 may be 0.01 μ F.
As shown in fig. 2, in some embodiments, the alarm unit 3 comprises a third resistor R3, a first light emitting diode VD1, a sixth diode D6, a second light emitting diode VD2, a fourth resistor R4, a second potentiometer RP2, a piezoelectric ceramic plate HTD, a fifth resistor R5, and a single junction transistor VT1, a first end of the third resistor R3 is connected to the eighth end of the time base integrated circuit 2, an anode of the first light emitting diode VD1 is connected to the second end of the third resistor R3, a cathode of the first light emitting diode VD1 is connected to the third end of the time base integrated circuit 2, the relay further comprises a coil K, a first end of the coil K is connected to a cathode of the first light emitting diode VD1, a first end of the sixth diode D6 is connected to the second end of the coil K, a second end of the sixth diode D6 is connected to the third end of the time base integrated circuit 2, an anode of the second light emitting diode VD2 is connected to the second end of the coil K, the cathode of the second light-emitting diode VD2 is connected with the second end of the fourth capacitor C4, the first end of the fourth resistor R4 is connected with the cathode of the first light-emitting diode VD1, the first end of the second potentiometer RP2 is connected with the second end of the fourth resistor R4, the third end of the second potentiometer RP2 is connected with the second end of the fourth resistor R4, the first end of the piezoelectric ceramic piece HTD is connected with the second end of the second potentiometer RP2, the second end of the piezoelectric ceramic piece HTD is connected with the cathode of the second light-emitting diode VD2, the first end of the fifth resistor R5 is connected with the first end of the third resistor R3, the emitter of the unijunction transistor VT1 is connected with the second end of the second potentiometer RP2, the first base of the unijunction transistor VT1 is connected with the second end of the fifth resistor R5, and the second base of the unijunction transistor VT1 is connected with the second end of the piezoelectric HTD.
It can be understood that, when the gas concentration reaches a certain degree, the output of the third end of the time-base integrated circuit 2 is converted from low level to high level, the high level signal makes the first light-emitting diode VD1 cut off, and makes the second light-emitting diode VD2 conduct, thereby realizing the light emission of the second light-emitting diode VD2, meanwhile, the high level signal forms an oscillation signal under the effect of devices such as the fourth resistor R4, the unijunction transistor VT1, the fifth resistor R5, and the like, thereby making the piezoelectric ceramic piece HTD send out regular alarm sound, therefore, through audible and visual alarm, the operating personnel are effectively reminded, the operating personnel can timely handle the problem that the gas concentration exceeds the limit, and the loss of human bodies and property is avoided.
Moreover, when the output of the third terminal of the time base integrated circuit 2 is switched from the low level to the high level, the coil K is also electrified due to the fact that the coil K is connected in series with the second light emitting diode VD2, so that the first contact K1 and the second contact K2 are closed, and the reduction of the gas concentration is achieved.
It should be noted that the piezoelectric ceramic HTD is an electronic sound component, a piezoelectric ceramic dielectric material is placed between two copper circular electrodes, when a signal is connected to the two electrodes, the piezoelectric ceramic vibrates according to the magnitude and frequency of the signal to generate corresponding sound, and the specific type of the piezoelectric ceramic HTD can be set according to actual needs, which is not limited herein.
The resistance value of the second potentiometer RP2 can be set according to actual needs, for example: the resistance value of the second potentiometer RP2 may range from 200k Ω -2.2M Ω.
The specific resistance values of the third resistor R3, the fourth resistor R4 and the fifth resistor R5 can be set according to actual needs, for example: the resistance value of the third resistor R3 may be 2k Ω, the resistance value of the fourth resistor R4 may be 10k Ω, and the resistance value of the fifth resistor R5 may be 750 Ω.
The specific types of the sixth diode D6, the first light emitting diode VD1, and the second light emitting diode VD2 may be set according to actual needs, and are not limited herein.
The unijunction transistor VT1 is a three-terminal semiconductor device, the unijunction transistor VT1 is an N-type single crystal semiconductor serving as a base region, a first base and a second base which are in ohmic contact are formed at two ends of the base region, a PN junction is formed in the center of the base region to serve as an emitter, and the specific type of the unijunction transistor VT1 can be set according to actual needs, and is not limited herein.
As shown in fig. 2, in some embodiments, the negative ion generator 8 includes a fifth capacitor C5, a second transistor Q2, a third potentiometer RP3, a sixth capacitor C6, a second transformer T2, a seventh diode D7, a sixth resistor R6, and a discharge tip, a first terminal of the fifth capacitor C5 is connected to a second terminal of the second contact K2, the second transistor Q2 is NPN type, a collector of the second transistor Q2 is connected to a second terminal of the fifth capacitor C5, an emitter of the second transistor Q2 is connected to a second terminal of the second contact K2, a second terminal of the third potentiometer RP3 is connected to an emitter of the second transistor Q2, a third terminal of the third potentiometer RP3 is connected to an emitter of the second transistor Q2, a first terminal of the sixth capacitor C6 is connected to a first terminal of the third potentiometer RP3, a second terminal of the sixth capacitor C6 is connected to a second base of the single junction transistor VT1, a first end of a primary side first winding of the second transformer T2 is connected to a first end of the fifth capacitor C5, a second end of the primary side first winding of the second transformer T2 is connected to a second end of the fifth capacitor C5, a first end of a primary side second winding of the second transformer T2 is connected to a base of the second transistor Q2, a second end of the primary side second winding of the second transformer T2 is connected to a first end of the third potentiometer RP3, a second end of a secondary side winding of the second transformer T2 is connected to a second end of the sixth capacitor C6, a second end of a secondary side winding of the second transformer T2 is grounded, a cathode of the seventh diode D7 is connected to a first end of the secondary side winding of the second transformer T2, a first end of the sixth resistor R6 is connected to an anode of the seventh diode D7, and an input end of the discharge tip is connected to a second end of the sixth resistor R6.
It can be understood that, when the gas concentration reaches a certain degree, the output of the third terminal of the time base integrated circuit 2 is converted from a low level to a high level, and the high level signal makes the coil K charged, so that the second contact K2 is closed, and thus, the high level signal generates an oscillation signal under the action of the fifth capacitor C5, the second triode Q2, the third potentiometer RP3, and the like, and the oscillation signal generates a negative high voltage under the action of the second transformer T2, the seventh diode D7, and the sixth resistor R6, so that the air is ionized through the discharge tip, and further the reduction of the gas concentration is realized.
It should be noted that the specific type of the second transformer T2 can be set according to actual needs, and is not limited herein.
The specific resistance value of the third potentiometer RP3 can be set according to actual needs, for example: the resistance value of the third potentiometer RP3 may be 2.2k Ω.
The specific resistance value of the sixth resistor R6 can be set according to actual needs, for example: 4.7 M.OMEGA.
The specific capacitance value of the fifth capacitor C5 can be set according to actual needs, and is not limited herein.
The specific capacitance value of the sixth capacitor C6 can be set according to actual needs, for example: the capacitance value of the sixth capacitor C6 may be 0.033 uf.
The specific type of the seventh diode D7 may be set according to actual needs, and is not limited herein.
The first triode Q1 of NPN type includes two N (Negative) type semiconductors and a P (Positive) type semiconductor, and the P type semiconductor sets up between two N type semiconductors, and first triode Q1 includes Base (Base), emitter (Emitter) and Collector (Collector), and when first triode Q1 was in the off-state, disconnection between Emitter and the collecting electrode, when first triode Q1 was in the on-state, switched on between Emitter and the collecting electrode.
The specific type of the second transistor Q2 can be set according to actual needs, and is not limited herein.
The discharge tip can be made of metal or carbon element, and is required to be in effective contact with air, the discharge tip utilizes negative high voltage to generate high corona, a large amount of electrons are emitted at high speed, and the electrons cannot exist in the air for a long time, so that the electrons can be immediately captured by oxygen molecules in the air, and air negative ions are generated.
It should be noted that, in the description of the present disclosure, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present disclosure, "a plurality" means two or more unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present disclosure includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present disclosure.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present disclosure have been shown and described above, it will be understood that the above embodiments are exemplary and not to be construed as limiting the present disclosure, and that changes, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present disclosure.
Claims (10)
1. A gas monitoring system, comprising:
a gas-sensitive detection unit for converting a gas concentration into a level signal;
the input end of the time-base integrated circuit is connected with the output end of the gas-sensitive detection unit, and the time-base integrated circuit is used for converting a low-level signal output by the gas-sensitive detection unit into a high-level signal;
the input end of the alarm unit is connected with the output end of the time-base integrated circuit, the alarm unit is used for sending alarm information, and the alarm unit comprises: the input end of the relay is connected with the output end of the time base integrated circuit;
and the input end of the protection unit is connected with the output end of the relay, and when the input end of the relay is a high-level signal, the protection unit is used for reducing the concentration of the gas.
2. The gas monitoring system of claim 1, wherein the protection unit comprises:
an alternating current power supply;
the first end of the ventilation fan is connected with the first end of the alternating current power supply, and the second end of the ventilation fan is connected with the second end of the alternating current power supply;
the first end of the ultraviolet killing unit is connected with the first end of the ventilation fan, and the second end of the ultraviolet killing unit is connected with the second end of the ventilation fan;
wherein, the relay includes: the first end of the first contact is connected with the first end of the alternating current power supply, the second end of the first contact is connected with the first end of the ventilation fan, the first contact is connected with the ventilation fan and the ultraviolet killing lamp tube in series, and when the input end of the relay is a high-level signal, the first contact is closed.
3. The gas monitoring system of claim 2, wherein the protection unit further comprises:
the first end of the alternating current-direct current conversion unit is connected with the first end of the alternating current power supply, and the second end of the alternating current-direct current conversion unit is connected with the second end of the alternating current power supply;
the first end of the negative ion generator is connected with the third end of the alternating current-direct current conversion unit, the second end of the negative ion generator is connected with the fourth end of the alternating current-direct current conversion unit, and the second end of the negative ion generator is grounded;
wherein, the relay still includes: and a first end of the second contact is connected with a third end of the alternating current-direct current conversion unit, a second end of the second contact is connected with a first end of the negative ion generator, the second contact is connected with the negative ion generator in series, and when an input end of the relay is a high level signal, the second contact is closed.
4. The gas monitoring system of claim 3, wherein the protection unit further comprises:
a first switch, a first end of which is connected with a first end of the alternating current power supply, a second end of which is connected with a first end of the ventilator, and the first switch is connected with the first contact in parallel;
a first end of the second switch is connected with a third end of the alternating current-direct current conversion unit, a second end of the second switch is connected with a first end of the negative ion generator, and the second switch is connected with the second contact in parallel;
the first end of the third switch is connected with the second end of the ventilator;
the first end of the iron core inductor is connected with the second end of the third switch, the second end of the iron core inductor is connected with the second end of the ultraviolet sterilizing lamp tube, and the iron core inductor and the third switch are connected with the ultraviolet sterilizing lamp tube in series.
5. The gas monitoring system of claim 3, wherein the AC-DC conversion unit comprises:
a first transformer, a first end of a primary winding of the first transformer being connected to a first end of the alternating current power supply, a second end of the primary winding of the first transformer being connected to a second end of the alternating current power supply;
the anode of the first diode is connected with the first end of the secondary side winding of the first transformer;
the cathode of the second diode is connected with the cathode of the first diode and the first end of the second contact;
a cathode of the third diode is connected with an anode of the first diode;
and the anode of the fourth diode is connected with the anode of the third diode and the second end of the negative ion generator, and the cathode of the fourth diode is connected with the anode of the second diode and the second end of the secondary side winding of the first transformer.
6. The gas monitoring system of claim 5, wherein the AC-DC conversion unit further comprises:
a first end of the first capacitor is connected with the cathode of the second diode, and a second end of the first capacitor is connected with the anode of the fourth diode;
the first end of the voltage stabilizer is connected with the first end of the first capacitor, and the second end of the voltage stabilizer is connected with the second end of the second capacitor;
and the first end of the second capacitor is connected with the third end of the voltage stabilizer and the first end of the second contact, and the second end of the second capacitor is connected with the second end of the voltage stabilizer and the second end of the negative ion generator.
7. The gas monitoring system of claim 3, wherein the gas sensitive detection unit comprises:
the first detection electrode of the gas sensor is connected with the third end of the AC-DC conversion unit, and the first heating electrode of the gas sensor is connected with the third end of the AC-DC conversion unit;
a first end of the first resistor is connected with the second heating electrode of the gas sensor, and a second end of the first resistor is connected with the fourth end of the alternating current-direct current conversion unit;
a first potentiometer, wherein a first end of the first potentiometer is connected with the second detection electrode of the gas sensor;
a first end of the trimming resistor is connected with a second end of the first potentiometer, and a second end of the trimming resistor is connected with a second end of the first resistor;
the anode of the fifth diode is connected with the third end of the first potentiometer;
a first end of the third capacitor is connected with the cathode of the fifth diode, and a second end of the third capacitor is connected with a second end of the trimming resistor;
the base electrode of the first triode is connected with the first end of the third capacitor, the emitting electrode of the first triode is connected with the second end of the third capacitor, and the collecting electrode of the first triode is connected with the input end of the time base integrated circuit;
and a first end of the second resistor is connected with the first heating electrode of the gas sensitive element, and a second end of the second resistor is connected with the collector electrode of the first triode.
8. The gas monitoring system according to claim 7, wherein the second terminal of the time base integrated circuit and the sixth terminal of the time base integrated circuit are connected to the collector of the first transistor, the fourth terminal of the time base integrated circuit and the eighth terminal of the time base integrated circuit are connected to the first terminal of the second resistor and the first terminal of the second contact, the first terminal of the time base integrated circuit is connected to the second terminal of the third capacitor, the fifth terminal of the time base integrated circuit is connected to the first terminal of the fourth capacitor, the second terminal of the fourth capacitor is connected to the first terminal of the time base integrated circuit and the second terminal of the anion generator, and the third terminal of the time base integrated circuit is connected to the input terminal of the anion generator.
9. The gas monitoring system of claim 8, wherein the alarm unit comprises:
a third resistor, a first end of the third resistor being connected to an eighth end of the time base integrated circuit;
the anode of the first light-emitting diode is connected with the second end of the third resistor, and the cathode of the first light-emitting diode is connected with the third end of the time-base integrated circuit;
a sixth diode, the relay further comprising: a first end of the coil is connected with a cathode of the first light emitting diode, a first end of the sixth diode is connected with a second end of the coil, and a second end of the sixth diode is connected with a third end of the time-base integrated circuit;
the anode of the second light-emitting diode is connected with the second end of the coil, and the cathode of the second light-emitting diode is connected with the second end of the fourth capacitor;
a first end of the fourth resistor is connected with the cathode of the first light-emitting diode;
a first end of the second potentiometer is connected with a second end of the fourth resistor, and a third end of the second potentiometer is connected with a second end of the fourth resistor;
the first end of the piezoelectric ceramic piece is connected with the second end of the second potentiometer, and the second end of the piezoelectric ceramic piece is connected with the cathode of the second light-emitting diode;
a first end of the fifth resistor is connected with a first end of the third resistor;
the emitter of the unijunction transistor is connected with the second end of the second potentiometer, the first base of the unijunction transistor is connected with the second end of the fifth resistor, and the second base of the unijunction transistor is connected with the second end of the piezoelectric ceramic plate.
10. The gas monitoring system of claim 9, wherein the ionizer comprises:
a first end of the fifth capacitor is connected with the second end of the second contact;
the second triode is of an NPN type, a collector of the second triode is connected with the second end of the fifth capacitor, and an emitter of the second triode is connected with the second end of the second contact;
a second end of the third potentiometer is connected with the emitter of the second triode, and a third end of the third potentiometer is connected with the emitter of the second triode;
a first end of the sixth capacitor is connected with the first end of the third potentiometer, and a second end of the sixth capacitor is connected with the second base electrode of the unijunction transistor;
a first end of a primary side first winding of the second transformer is connected with a first end of the fifth capacitor, a second end of the primary side first winding of the second transformer is connected with a second end of the fifth capacitor, a first end of a primary side second winding of the second transformer is connected with a base of the second triode, a second end of the primary side second winding of the second transformer is connected with a first end of the third potentiometer, a second end of a secondary side winding of the second transformer is connected with a second end of the sixth capacitor, and a second end of a secondary side winding of the second transformer is grounded;
a cathode of the seventh diode is connected with a first end of a secondary side winding of the second transformer;
a first end of the sixth resistor is connected with the anode of the seventh diode;
and the input end of the discharge tip is connected with the second end of the sixth resistor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211008788.1A CN115494121A (en) | 2022-08-22 | 2022-08-22 | Gas monitoring system |
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| CN202211008788.1A CN115494121A (en) | 2022-08-22 | 2022-08-22 | Gas monitoring system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4170770A (en) * | 1976-10-08 | 1979-10-09 | Tokyo Shibaura Electric Co., Ltd. | Gas leak-detecting apparatus |
| CN2779394Y (en) * | 2005-02-05 | 2006-05-10 | 沙胜利 | Multifunctional alarm controller for harmful gas with purification function |
| CN202502599U (en) * | 2012-03-20 | 2012-10-24 | 四川聚友生态农业科技有限公司 | Combustible gas control alarm |
| CN105389955A (en) * | 2015-11-28 | 2016-03-09 | 马磊 | Sewer biogas detector of residential district |
| CN109781793A (en) * | 2019-03-13 | 2019-05-21 | 商洛学院 | A kind of toxic gas detector based on Internet of Things |
-
2022
- 2022-08-22 CN CN202211008788.1A patent/CN115494121A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4170770A (en) * | 1976-10-08 | 1979-10-09 | Tokyo Shibaura Electric Co., Ltd. | Gas leak-detecting apparatus |
| CN2779394Y (en) * | 2005-02-05 | 2006-05-10 | 沙胜利 | Multifunctional alarm controller for harmful gas with purification function |
| CN202502599U (en) * | 2012-03-20 | 2012-10-24 | 四川聚友生态农业科技有限公司 | Combustible gas control alarm |
| CN105389955A (en) * | 2015-11-28 | 2016-03-09 | 马磊 | Sewer biogas detector of residential district |
| CN109781793A (en) * | 2019-03-13 | 2019-05-21 | 商洛学院 | A kind of toxic gas detector based on Internet of Things |
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