CN105546721A - Automatic water adding control system for humidifier based on rectifier type differential amplification circuit - Google Patents
Automatic water adding control system for humidifier based on rectifier type differential amplification circuit Download PDFInfo
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- CN105546721A CN105546721A CN201510952440.1A CN201510952440A CN105546721A CN 105546721 A CN105546721 A CN 105546721A CN 201510952440 A CN201510952440 A CN 201510952440A CN 105546721 A CN105546721 A CN 105546721A
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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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
- F24F2110/00—Control inputs relating to air properties
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Abstract
The invention discloses an automatic water adding control system for a humidifier based on a rectifier type differential amplification circuit. The automatic water adding control system is characterized by mainly comprising a central processing unit, an A/D converter, a preset value storage unit, an automatic water adding control circuit, a display, a power supply, the differential amplification circuit, a water level sensor, a rectifying and filtering circuit and an electromagnetic valve, wherein the A/D converter, the preset value storage unit, the automatic water adding control circuit, the display and the power supply are connected with the central processing unit; the differential amplification circuit is connected with the A/D converter; the water level sensor is connected with the differential amplification circuit; the rectifying and filtering circuit is serially connected between the power supply and the water level sensor; and the electromagnetic valve is connected with the automatic water adding control circuit. The automatic water adding control system not only is simple in structure, but also is low in cost; the water supply electromagnetic valve further can be opened through the automatic water adding control circuit when water in the humidifier is insufficient, so that automatic water adding is realized, the circumstance that the humidifier works under an condition of running out of water in the humidifier to cause faults and meanwhile waste electrical energy is prevented, and the automatic water adding control system is suitable to be popularized and used.
Description
Technical field
The present invention relates to a kind of automatic control system, specifically refer to a kind of humidifier automatic water adding control system based on rectifier type differential amplifier circuit.
Background technology
Humidifier is because can carry out humidification to room air and be subject to the favor of people gradually, and especially wintry weather is dry, and humidifier has just become the requisite household electrical appliance of a lot of people.Need when using humidifier to add water in humidifier, by the mode by spraying by water eruption in atmosphere, along with the continual eruption water smoke of humidifier, the water in humidifier is by fewer and feweri for humidifier.After the water in humidifier has been erupted, humidifier will no longer be sprayed, and therefore can not continue to carry out humidification to room air.The humidifier of current use cannot automatic watering after water is finished, and humidifier therefore often can be caused in initiate mode but cannot carry out the situation of humidification because of anhydrous.Humidifier works in anhydrous conditions and easily causes humidifier fault, goes back the wastes power energy simultaneously.
Summary of the invention
The object of the invention is to overcome the humidifier that uses at present cannot automatic watering after water is finished; therefore humidifier often can be caused in initiate mode but the defect of humidification cannot be carried out because of anhydrous; not only structure is simple to provide one; and with low cost, can also water shortage in humidifier time the humidifier automatic water adding control system based on rectifier type differential amplifier circuit that can add water in time.
The present invention is achieved through the following technical solutions:
Based on the humidifier automatic water adding control system of rectifier type differential amplifier circuit, primarily of central processing unit, the A/D converter be all connected with central processing unit, preset value memory cell, automatic watering control circuit, display and power supply, the differential amplifier circuit be connected with A/D converter, the level sensor be connected with differential amplifier circuit, be serially connected in the current rectifying and wave filtering circuit between power supply and level sensor, and the magnetic valve be connected with automatic watering control circuit forms; Described power supply is also connected with automatic watering control circuit; The power supply input circuit that described automatic watering control circuit is connected with power supply by input, the signal input circuit that input is connected with central processing unit, and the on-off circuit be connected with signal input circuit with power supply input circuit respectively forms; The output of described on-off circuit is connected with magnetic valve.
Further, described differential amplifier circuit is by amplifier P, triode VT8, triode VT9, FET Q3, one end is connected with A/D converter as one of them input of differential amplifier circuit, the resistance R21 that the other end is connected with the positive input terminal of amplifier P, one end is connected with A/D converter as another input of differential amplifier circuit, the resistance R22 that the other end is connected with the negative input end of amplifier P, positive pole is connected with the positive input terminal of amplifier P after resistance R23, the electric capacity C8 that negative pole is connected with the colelctor electrode of triode VT8 after resistance R24, P pole is connected with the negative input end of amplifier P, the diode D13 that N pole is connected with the base stage of triode VT8, N pole is connected with the output of amplifier P, the diode D14 that P pole is connected with the emitter stage of triode VT9, P pole is connected with the negative pole of electric capacity C8, N pole and FET Q3 send out the diode D15 that grid is connected, be serially connected in the resistance R25 between the colelctor electrode of triode VT8 and the drain electrode of FET Q3, be serially connected in the resistance R26 between the base stage of triode VT9 and the source electrode of FET Q3, and positive pole is connected with the colelctor electrode of triode VT8, the electric capacity C9 of minus earth forms, the emitter stage of described triode VT8 is connected with the output of amplifier P, and its colelctor electrode is connected with the colelctor electrode of triode VT9, the source electrode of described FET Q3 jointly forms the output of differential amplifier circuit with the colelctor electrode of triode VT8 and is connected with level sensor.
Further, described current rectifying and wave filtering circuit is by triode VT6, triode VT7, FET Q2, one end is connected with power supply as the input of current rectifying and wave filtering circuit, the resistance R14 that the other end is connected with the base stage of triode VT6, positive pole is connected with the base stage of triode VT6 after resistance R15, the electric capacity C6 of minus earth, P pole is connected with the emitter stage of triode VT6 after inductance L 2, the diode D10 that N pole is connected with the colelctor electrode of triode VT7 after diode D11, N pole is connected with the colelctor electrode of triode VT6, the diode D9 that P pole is connected with the drain electrode of FET Q2, be serially connected in the resistance R16 between the source electrode of FET Q2 and the emitter stage of triode VT7, be serially connected in the resistance R17 between the emitter stage of triode VT7 and the P pole of diode D10, N pole is connected with the colelctor electrode of triode VT6 after electric capacity C7 through slide rheostat R19 in turn, the diode D12 that P pole is connected with the base stage of triode VT7, be serially connected in the resistance R18 between the N pole of diode D12 and the N pole of diode D10, and one end is connected with the base stage of triode VT7, the resistance R20 of other end ground connection forms, the grid of described FET Q2 is connected with the positive pole of electric capacity C6, and the N pole of described diode D12 is connected with level sensor as the output of current rectifying and wave filtering circuit.
Further, described power supply input circuit is by triode VT1, triode VT2, the base stage of one end and triode VT1 jointly as power supply input circuit input and be connected with power supply, the inductance L 1 that the other end is connected with the emitter stage of triode VT2 after diode D1, positive pole is connected with the tie point of inductance L 1 with diode D1, the electric capacity C1 of minus earth, be serially connected in the resistance R1 between the base stage of triode VT1 and the base stage of triode VT2, be serially connected in the resistance R2 between the emitter stage of triode VT1 and the colelctor electrode of triode VT2, P pole is connected with the colelctor electrode of triode VT2 after resistance R3, the diode D2 that N pole is connected with the colelctor electrode of triode VT1, and positive pole is connected with the P pole of diode D2, the electric capacity C2 of minus earth forms, the colelctor electrode of described triode VT2 is connected with on-off circuit with signal input circuit respectively as the output of power supply input circuit.
Described signal input circuit is by triode VT3, triode VT4, be serially connected in the resistance R6 between the base stage of triode VT3 and the base stage of triode VT4, one end is connected with the colelctor electrode of triode VT3, the resistance R4 that the other end is connected with the colelctor electrode of triode VT2 after relay K, P pole is connected with the emitter stage of triode VT3, the diode D5 that N pole is connected with the colelctor electrode of triode VT4, P pole is connected with the emitter stage of triode VT4, the diode D4 that N pole is connected with the colelctor electrode of triode VT4 after resistance R7, N pole is connected with the emitter stage of triode VT3, the diode D3 that P pole is connected with the N pole of diode D4 after resistance R5, and positive pole is connected with the colelctor electrode of triode VT4, the electric capacity C3 of minus earth forms, the base stage of described triode VT3 is connected with central processing unit as the input of signal input circuit, and the N pole of described diode D4 is connected with on-off circuit as the output of signal input circuit.
Described on-off circuit is by triode VT5, FET Q1, P pole is connected with the colelctor electrode of triode VT2, the diode D6 that N pole is connected with the base stage of triode VT5, be serially connected in the resistance R8 between the base stage of triode VT5 and its colelctor electrode, be serially connected in the resistance R11 between the colelctor electrode of triode VT5 and the source electrode of FET Q1, N pole is connected with the drain electrode of FET Q1, P pole is in turn through diode D8 that electric capacity C4 is connected with the emitter stage of triode VT5 after resistance R9, N pole is connected with the colelctor electrode of triode VT5, the diode D7 that P pole is connected with the P pole of diode D8 after resistance R10, one end is connected with the P pole of diode D8, the resistance R13 that the other end is connected with the grid of FET Q1, positive pole is connected with the grid of FET Q1, the electric capacity C5 of minus earth, and one end is connected with the N pole of diode D4 after the normally opened contact K-1 of relay K, the resistance R12 that the other end is connected with the grid of FET Q1 forms, the P pole of described diode D8 is connected with magnetic valve as the output of on-off circuit.
In order to ensure effect, described display is the high-definition liquid crystal display with touch function.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) not only structure is simple in the present invention, and it is with low cost, also water supply electromagnetic valve is opened by automatic watering control circuit during water shortage in humidifier, thus realize automatic watering, cause humidifier fault to prevent humidifier from working in anhydrous conditions, go back the wastes power energy simultaneously.
(2) current rectifying and wave filtering circuit of the present invention can carry out rectifying and wave-filtering process to power supply, so that provide stable voltage x current for level sensor.
(3) differential amplifier circuit of the present invention can amplify the water level signal that level sensor gathers, so that A/D converter receive this amplification after water level signal and carry out analog-to-digital conversion, thus the water level information being convenient to be collected by level sensor is supplied to central processing unit processes.
(4) power supply input circuit of the present invention is for accessing power supply, thus is solenoid valve.
(5) control signal that sends for receiving central processing unit of signal input circuit of the present invention, so that the opening and closing of Controlling solenoid valve.
(6) control signal that receives for the power supply and signal input circuit receiving power supply input circuit access of on-off circuit of the present invention, when on-off circuit conducting during water shortage in humidifier, magnetic valve obtain electric after open and add water to humidifier; When in humidifier, water is filled it up with, then on-off circuit disconnects, and magnetic valve adhesive then stops adding water.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention.
Fig. 2 is the electrical block diagram of automatic watering control circuit of the present invention.
Fig. 3 is the electrical block diagram of current rectifying and wave filtering circuit of the present invention.
Fig. 4 is the electrical block diagram of differential amplifier circuit of the present invention.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment
As shown in Figure 1, automatic water adding control system of the present invention, primarily of central processing unit, the A/D converter be all connected with central processing unit, preset value memory cell, automatic watering control circuit, display and power supply, the differential amplifier circuit be connected with A/D converter, the level sensor be connected with differential amplifier circuit, is serially connected in the current rectifying and wave filtering circuit between power supply and level sensor, and the magnetic valve be connected with automatic watering control circuit forms; Described power supply is also connected with automatic watering control circuit.During use, maximum and the minimum of a value of humidifier middle water level need be preset, and this water level value information preset is kept in preset value memory cell.Display of the present invention is the high-definition liquid crystal display with touch function, gets final product preset water level value, and shown by default humidity value by this display.Need to access water pipe simultaneously on humidifier, and magnetic valve be arranged on water pipe, namely by solenoid control water pipe to water filling in humidifier.
Described level sensor is arranged in humidifier, for gathering the water level information in humidifier, and gathered water level information and be sent to A/D converter and carry out analog-to-digital conversion, thus the water level signal of level sensor collection is converted to the signal that central processing unit can carry out computing, and this signal is sent to central processing unit.The data storage of C8051F020 model that what preset value memory cell in the present embodiment adopted is, what described central processing unit adopted is SOP8 integrated chip.Described central processing unit draws the Real-time Water place value of humidifier after being processed by the water level information of level sensor collection, this real-time water level information is sent to display and shows by central processing unit.Simultaneously, the Real-time Water place value of level sensor collection and the water level value preset compare by central processing unit, when Real-time Water place value is less than default lowest water level value, central processing unit sends control signal to automatic watering control circuit, after automatic watering control circuit receives this control signal, Controlling solenoid valve is opened, and can add water to humidifier.Water pipe continues water filling in humidifier, the process that adds water middle water level sensor ceaselessly gathers water level signal, when the water level value of level sensor collection reaches default maximum stage value, central processing unit stops sending control signal to automatic watering control circuit, automatic watering control circuit does not receive control signal and then stops Controlling solenoid valve, magnetic valve adhesive, water pipe stops water filling.The present invention can open water supply electromagnetic valve by automatic watering control circuit during water shortage in humidifier, thus realizes automatic watering, causes humidifier fault to prevent humidifier from working in anhydrous conditions, goes back the wastes power energy simultaneously.
During enforcement, the power supply input circuit that described automatic watering control circuit is connected with power supply by input, the signal input circuit that input is connected with central processing unit, and the on-off circuit be connected with signal input circuit with power supply input circuit respectively forms; The output of described on-off circuit is connected with magnetic valve.Concrete, as shown in Figure 2, described power supply input circuit is by triode VT1, and triode VT2, inductance L 1, diode D1, diode D2, electric capacity C1, electric capacity C2, resistance R1, resistance R2 and resistance R3 form.Described power supply input circuit for accessing power supply, thus is solenoid valve so that make during water shortage in humidifier magnetic valve obtain electric after open, can to humidifier water filling.
During connection, one end of described inductance L 1 and the base stage of triode VT1 are jointly as the input of power supply input circuit, and its other end is connected with the emitter stage of triode VT2 after diode D1.Wherein, the P pole of described diode D1 is connected with inductance L 1, its N pole is then connected with the emitter stage of triode VT2.The positive pole of described electric capacity C1 is connected with the tie point of inductance L 1 with diode D1, its minus earth.Described resistance R1 is serially connected between the base stage of triode VT1 and the base stage of triode VT2, and described resistance R2 is serially connected between the emitter stage of triode VT1 and the colelctor electrode of triode VT2.The P pole of described diode D2 is connected with the colelctor electrode of triode VT2 after resistance R3, and its N pole is connected with the colelctor electrode of triode VT1.The positive pole of described electric capacity C2 is connected with the P pole of diode D2, its minus earth.Meanwhile, the colelctor electrode of described triode VT2 is connected with on-off circuit with signal input circuit respectively as the output of power supply input circuit.
Described signal input circuit is by triode VT3, and triode VT4, relay K, diode D3, diode D4, diode D5, electric capacity C3, resistance R4, resistance R5, resistance R6 and resistance R7 form.The control signal that described signal input circuit sends for receiving central processing unit so that in humidifier during water shortage Controlling solenoid valve open, thus to humidifier water filling; And Controlling solenoid valve adhesive when amount of water reaches default maximum stage value in humidifier, can stop to humidifier water filling, to prevent from ceaselessly causing to humidifier water filling the situation that water spill-over goes out.
During connection, described resistance R6 is serially connected between the base stage of triode VT3 and the base stage of triode VT4.One end of described resistance R4 is connected with the colelctor electrode of triode VT3, and its other end is connected with the colelctor electrode of triode VT2 after relay K.The P pole of described diode D5 is connected with the emitter stage of triode VT3, and its N pole is connected with the colelctor electrode of triode VT4.The P pole of described diode D4 is connected with the emitter stage of triode VT4, and its N pole is connected with the colelctor electrode of triode VT4 after resistance R7.The N pole of described diode D3 is connected with the emitter stage of triode VT3, and its P pole is connected with the N pole of diode D4 after resistance R5.The positive pole of described electric capacity C3 is connected with the colelctor electrode of triode VT4, its minus earth.
Meanwhile, the base stage of described triode VT3 is connected with central processing unit as the input of signal input circuit, and the N pole of described diode D4 is connected with on-off circuit as the output of signal input circuit.In the present embodiment, the input of described signal input circuit is connected with the CS pin of SOP8 integrated chip, described preset value memory cell is connected with the GD pin of SOP8 integrated chip, described display is connected with the COMP pin of SOP8 integrated chip, described A/D converter is connected with the MULF pin of SOP8 integrated chip, and described power supply is then connected with VCC pin with the INV pin of SOP8 integrated chip respectively.
Described on-off circuit is by triode VT5, and FET Q1, diode D6, diode D7, diode D8, electric capacity C4, electric capacity C5, resistance R8, resistance R9, resistance R10, resistance R11, resistance R12 and resistance R13 form.During connection, the P pole of described diode D6 is connected with the colelctor electrode of triode VT2, and its N pole is connected with the base stage of triode VT5.Described resistance R8 is serially connected between the base stage of triode VT5 and its colelctor electrode, and described resistance R11 is serially connected between the colelctor electrode of triode VT5 and the source electrode of FET Q1.The N pole of described diode D8 is connected with the drain electrode of FET Q1, and its P pole is connected with the emitter stage of triode VT5 after resistance R9 through electric capacity C4 in turn.Wherein, the positive pole of described electric capacity C4 is connected with resistance R9, and its negative pole is then connected with the P pole of diode D8.The N pole of described diode D7 is connected with the colelctor electrode of triode VT5, and its P pole is connected with the P pole of diode D8 after resistance R10.One end of described resistance R13 is connected with the P pole of diode D8, and its other end is connected with the grid of FET Q1.The positive pole of described electric capacity C5 is connected with the grid of FET Q1, its minus earth.One end of described resistance R12 is connected with the N pole of diode D4 after the normally opened contact K-1 of relay K, and its other end is connected with the grid of FET Q1.Meanwhile, the P pole of described diode D8 is connected with magnetic valve as the output of on-off circuit.
The control signal that described on-off circuit receives for the power supply and signal input circuit receiving power supply input circuit access, when in humidifier during water shortage central processing unit send control signal to signal input circuit, relay K obtains electric, the normally opened contact K-1 of relay K closes, on-off circuit conducting, magnetic valve obtains electric and opens, and water pipe can to water filling in humidifier.When amount of water in humidifier reaches default maximum stage value, central processing unit stops sending control signal, signal receiving circuit does not receive control signal, relay K must not be electric, then the normally opened contact K-1 of relay K disconnects, on-off circuit disconnects, magnetic valve dead electricity adhesive, water pipe stops to water filling in humidifier.
As shown in Figure 3, described current rectifying and wave filtering circuit by triode VT6, triode VT7, FET Q2, inductance L 2, diode D9, diode D10, diode D11, diode D12, electric capacity C6, electric capacity C7, resistance R14, resistance R15, resistance R16, resistance R17, resistance R18, slide rheostat R19 and resistance R20 form.Described current rectifying and wave filtering circuit can carry out rectifying and wave-filtering process to power supply, so that provide stable voltage x current for level sensor.
During connection, one end of described resistance R14 is connected with power supply as the input of current rectifying and wave filtering circuit, the other end is connected with the base stage of triode VT6.The positive pole of described electric capacity C6 is connected with the base stage of triode VT6 after resistance R15, its minus earth.The P pole of described diode D10 is connected with the emitter stage of triode VT6 after inductance L 2, and its N pole is connected with the colelctor electrode of triode VT7 after diode D11.Wherein, the P pole of described diode D11 is connected with the N pole of diode D10, and its N pole is connected with the colelctor electrode of triode VT7.The N pole of described diode D9 is connected with the colelctor electrode of triode VT6, and its P pole is connected with the drain electrode of FET Q2.Described resistance R16 is serially connected between the source electrode of FET Q2 and the emitter stage of triode VT7, and described resistance R17 is serially connected between the emitter stage of triode VT7 and the P pole of diode D10.The N pole of described diode D12 is connected with the colelctor electrode of triode VT6 after electric capacity C7 through slide rheostat R19 in turn, and its P pole is connected with the base stage of triode VT7.Wherein, the negative pole of described electric capacity C7 is connected with the colelctor electrode of triode VT6, and its positive pole is connected with slide rheostat R19, and the sliding end of this slide rheostat R19 is connected with the base stage of triode VT7.Described resistance R18 is serially connected between the N pole of diode D12 and the N pole of diode D10.One end of described resistance R20 is connected with the base stage of triode VT7, its other end ground connection.The grid of described FET Q2 is connected with the positive pole of electric capacity C6, and the N pole of described diode D12 is connected with level sensor as the output of current rectifying and wave filtering circuit.
As shown in Figure 4, described differential amplifier circuit by amplifier P, triode VT8, triode VT9, FET Q3, diode D13, diode D14, diode D15, electric capacity C8, electric capacity C9, resistance R21, resistance R22, resistance R23, resistance R24, resistance R25 and resistance R26 form.Described differential amplifier circuit can amplify the water level signal that level sensor gathers, so that A/D converter receive this amplification after water level signal and carry out analog-to-digital conversion, thus the water level information being convenient to be collected by level sensor is supplied to central processing unit processes.
During connection, one end of described resistance R21 is connected with A/D converter as one of them input of differential amplifier circuit, and its other end is connected with the positive input terminal of amplifier P.One end of described resistance R22 is connected with A/D converter as another input of differential amplifier circuit, and its other end is connected with the negative input end of amplifier P.The positive pole of described electric capacity C8 is connected with the positive input terminal of amplifier P after resistance R23, and its negative pole is connected with the colelctor electrode of triode VT8 after resistance R24.The P pole of described diode D13 is connected with the negative input end of amplifier P, and its N pole is connected with the base stage of triode VT8.The N pole of described diode D14 is connected with the output of amplifier P, and its P pole is connected with the emitter stage of triode VT9.The P pole of described diode D15 is connected with the negative pole of electric capacity C8, and its N pole is sent out grid with FET Q3 and is connected.Described resistance R25 is serially connected between the colelctor electrode of triode VT8 and the drain electrode of FET Q3, and described resistance R26 is serially connected between the base stage of triode VT9 and the source electrode of FET Q3.The positive pole of described electric capacity C9 is connected with the colelctor electrode of triode VT8, its minus earth.The emitter stage of described triode VT8 is connected with the output of amplifier P, and its colelctor electrode is connected with the colelctor electrode of triode VT9; The source electrode of described FET Q3 jointly forms the output of differential amplifier circuit with the colelctor electrode of triode VT8 and is connected with level sensor.
As mentioned above, just the present invention can be realized preferably.
Claims (7)
1. based on the humidifier automatic water adding control system of rectifier type differential amplifier circuit, it is characterized in that: primarily of central processing unit, the A/D converter be all connected with central processing unit, preset value memory cell, automatic watering control circuit, display and power supply, the differential amplifier circuit be connected with A/D converter, the level sensor be connected with differential amplifier circuit, be serially connected in the current rectifying and wave filtering circuit between power supply and level sensor, and the magnetic valve be connected with automatic watering control circuit forms; Described power supply is also connected with automatic watering control circuit; The power supply input circuit that described automatic watering control circuit is connected with power supply by input, the signal input circuit that input is connected with central processing unit, and the on-off circuit be connected with signal input circuit with power supply input circuit respectively forms; The output of described on-off circuit is connected with magnetic valve.
2. the humidifier automatic water adding control system based on rectifier type differential amplifier circuit according to claim 1, it is characterized in that: described current rectifying and wave filtering circuit is by triode VT6, triode VT7, FET Q2, one end is connected with power supply as the input of current rectifying and wave filtering circuit, the resistance R14 that the other end is connected with the base stage of triode VT6, positive pole is connected with the base stage of triode VT6 after resistance R15, the electric capacity C6 of minus earth, P pole is connected with the emitter stage of triode VT6 after inductance L 2, the diode D10 that N pole is connected with the colelctor electrode of triode VT7 after diode D11, N pole is connected with the colelctor electrode of triode VT6, the diode D9 that P pole is connected with the drain electrode of FET Q2, be serially connected in the resistance R16 between the source electrode of FET Q2 and the emitter stage of triode VT7, be serially connected in the resistance R17 between the emitter stage of triode VT7 and the P pole of diode D10, N pole is connected with the colelctor electrode of triode VT6 after electric capacity C7 through slide rheostat R19 in turn, the diode D12 that P pole is connected with the base stage of triode VT7, be serially connected in the resistance R18 between the N pole of diode D12 and the N pole of diode D10, and one end is connected with the base stage of triode VT7, the resistance R20 of other end ground connection forms, the grid of described FET Q2 is connected with the positive pole of electric capacity C6, and the N pole of described diode D12 is connected with level sensor as the output of current rectifying and wave filtering circuit.
3. the humidifier automatic water adding control system based on rectifier type differential amplifier circuit according to claim 2, it is characterized in that: described differential amplifier circuit is by amplifier P, triode VT8, triode VT9, FET Q3, one end is connected with A/D converter as one of them input of differential amplifier circuit, the resistance R21 that the other end is connected with the positive input terminal of amplifier P, one end is connected with A/D converter as another input of differential amplifier circuit, the resistance R22 that the other end is connected with the negative input end of amplifier P, positive pole is connected with the positive input terminal of amplifier P after resistance R23, the electric capacity C8 that negative pole is connected with the colelctor electrode of triode VT8 after resistance R24, P pole is connected with the negative input end of amplifier P, the diode D13 that N pole is connected with the base stage of triode VT8, N pole is connected with the output of amplifier P, the diode D14 that P pole is connected with the emitter stage of triode VT9, P pole is connected with the negative pole of electric capacity C8, N pole and FET Q3 send out the diode D15 that grid is connected, be serially connected in the resistance R25 between the colelctor electrode of triode VT8 and the drain electrode of FET Q3, be serially connected in the resistance R26 between the base stage of triode VT9 and the source electrode of FET Q3, and positive pole is connected with the colelctor electrode of triode VT8, the electric capacity C9 of minus earth forms, the emitter stage of described triode VT8 is connected with the output of amplifier P, and its colelctor electrode is connected with the colelctor electrode of triode VT9, the source electrode of described FET Q3 jointly forms the output of differential amplifier circuit with the colelctor electrode of triode VT8 and is connected with level sensor.
4. the humidifier automatic water adding control system based on rectifier type differential amplifier circuit according to claim 3, it is characterized in that: described power supply input circuit is by triode VT1, triode VT2, the base stage of one end and triode VT1 jointly as power supply input circuit input and be connected with power supply, the inductance L 1 that the other end is connected with the emitter stage of triode VT2 after diode D1, positive pole is connected with the tie point of inductance L 1 with diode D1, the electric capacity C1 of minus earth, be serially connected in the resistance R1 between the base stage of triode VT1 and the base stage of triode VT2, be serially connected in the resistance R2 between the emitter stage of triode VT1 and the colelctor electrode of triode VT2, P pole is connected with the colelctor electrode of triode VT2 after resistance R3, the diode D2 that N pole is connected with the colelctor electrode of triode VT1, and positive pole is connected with the P pole of diode D2, the electric capacity C2 of minus earth forms, the colelctor electrode of described triode VT2 is connected with on-off circuit with signal input circuit respectively as the output of power supply input circuit.
5. the humidifier automatic water adding control system based on rectifier type differential amplifier circuit according to claim 4, it is characterized in that: described signal input circuit is by triode VT3, triode VT4, be serially connected in the resistance R6 between the base stage of triode VT3 and the base stage of triode VT4, one end is connected with the colelctor electrode of triode VT3, the resistance R4 that the other end is connected with the colelctor electrode of triode VT2 after relay K, P pole is connected with the emitter stage of triode VT3, the diode D5 that N pole is connected with the colelctor electrode of triode VT4, P pole is connected with the emitter stage of triode VT4, the diode D4 that N pole is connected with the colelctor electrode of triode VT4 after resistance R7, N pole is connected with the emitter stage of triode VT3, the diode D3 that P pole is connected with the N pole of diode D4 after resistance R5, and positive pole is connected with the colelctor electrode of triode VT4, the electric capacity C3 of minus earth forms, the base stage of described triode VT3 is connected with central processing unit as the input of signal input circuit, and the N pole of described diode D4 is connected with on-off circuit as the output of signal input circuit.
6. the humidifier automatic water adding control system based on rectifier type differential amplifier circuit according to claim 5, it is characterized in that: described on-off circuit is by triode VT5, FET Q1, P pole is connected with the colelctor electrode of triode VT2, the diode D6 that N pole is connected with the base stage of triode VT5, be serially connected in the resistance R8 between the base stage of triode VT5 and its colelctor electrode, be serially connected in the resistance R11 between the colelctor electrode of triode VT5 and the source electrode of FET Q1, N pole is connected with the drain electrode of FET Q1, P pole is in turn through diode D8 that electric capacity C4 is connected with the emitter stage of triode VT5 after resistance R9, N pole is connected with the colelctor electrode of triode VT5, the diode D7 that P pole is connected with the P pole of diode D8 after resistance R10, one end is connected with the P pole of diode D8, the resistance R13 that the other end is connected with the grid of FET Q1, positive pole is connected with the grid of FET Q1, the electric capacity C5 of minus earth, and one end is connected with the N pole of diode D4 after the normally opened contact K-1 of relay K, the resistance R12 that the other end is connected with the grid of FET Q1 forms, the P pole of described diode D8 is connected with magnetic valve as the output of on-off circuit.
7. the humidifier automatic water adding control system based on rectifier type differential amplifier circuit according to any one of claim 1 ~ 6, is characterized in that: described display is the high-definition liquid crystal display with touch function.
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| CN201510952440.1A CN105546721A (en) | 2015-12-17 | 2015-12-17 | Automatic water adding control system for humidifier based on rectifier type differential amplification circuit |
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| CN201510952440.1A CN105546721A (en) | 2015-12-17 | 2015-12-17 | Automatic water adding control system for humidifier based on rectifier type differential amplification circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2123726U (en) * | 1992-06-06 | 1992-12-02 | 成都市电器空调设备厂 | Ultrasonic humidifier |
| CN2261620Y (en) * | 1995-11-29 | 1997-09-03 | 南京建筑工程学院 | Digital water level meter |
| CN2654404Y (en) * | 2003-11-12 | 2004-11-10 | 周发崇 | Automobile negative ion air humidifier |
| CN202769866U (en) * | 2012-09-20 | 2013-03-06 | 上海大学 | Intelligent air humidifier |
| CN203038125U (en) * | 2013-01-21 | 2013-07-03 | 江晋剑 | Multiport portable type intelligent liquid level control device |
| CN204757252U (en) * | 2015-05-08 | 2015-11-11 | 深圳市双驰科技有限公司 | Intelligence humidification system based on thing networking |
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2015
- 2015-12-17 CN CN201510952440.1A patent/CN105546721A/en not_active Withdrawn
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2123726U (en) * | 1992-06-06 | 1992-12-02 | 成都市电器空调设备厂 | Ultrasonic humidifier |
| CN2261620Y (en) * | 1995-11-29 | 1997-09-03 | 南京建筑工程学院 | Digital water level meter |
| CN2654404Y (en) * | 2003-11-12 | 2004-11-10 | 周发崇 | Automobile negative ion air humidifier |
| CN202769866U (en) * | 2012-09-20 | 2013-03-06 | 上海大学 | Intelligent air humidifier |
| CN203038125U (en) * | 2013-01-21 | 2013-07-03 | 江晋剑 | Multiport portable type intelligent liquid level control device |
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