CN204985015U - Scavenger fan control system - Google Patents
Scavenger fan control system Download PDFInfo
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- CN204985015U CN204985015U CN201520607817.5U CN201520607817U CN204985015U CN 204985015 U CN204985015 U CN 204985015U CN 201520607817 U CN201520607817 U CN 201520607817U CN 204985015 U CN204985015 U CN 204985015U
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Abstract
The utility model discloses a scavenger fan control system, including transformer T, relay K, triode VT1, rectifier bridge Q, gas sensor U1 and resistance R1, 220V alternating current one end and relay K contact K -1 are connected respectively to transformer T coil L1 one end, scavenger fan one end is connected to the relay K contact K -1 other end, the transformer T coil L1 other end and the 220V alternating current other end are connected respectively to the scavenger fan other end, transformer T coil L2 connects at both ends gas sensor U1 pin 1 and gas sensor U1 pin 3 respectively, transformer T coil L3 connects at both ends rectifier bridge Q pin 1 and rectifier bridge Q pin 3 respectively. The utility model discloses scavenger fan control system, through using the whole circuit of the outside electronic component of low -priced gas sensor U1 and some control, not only simple structure makes entire system's cost lower moreover, can realize automatic control, is fit for various different customers' demand, long service life.
Description
Technical field
The utility model relates to a kind of ventilation fan, specifically a kind of ventilator control system.
Background technique
In a lot of public lavatory, facility is very complete now, but the vent systems that but neither one is good, cause the link in public lavatory very severe, although there is ventilation fan in the public lavatory in some high-grade place, but ventilation fan is but at work, waste electric energy on the one hand always, cause ventilation fan service life reduction on the other hand.
Model utility content
The purpose of this utility model is to provide a kind of ventilator control system, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technological scheme: a kind of ventilator control system, comprise transformer T, relay K, triode VT1, rectifier bridge Q, gas sensing member U1 and resistance R1, described transformer T coil L1 one end connects 220V Ac one end and relay K contact K-1 respectively, the relay K contact K-1 the other end connects ventilation fan one end, the ventilation fan the other end is the connection transformer T coil L1 the other end and the 220V Ac the other end respectively, transformer T coil L2 two ends connect gas sensing member U1 pin 1 and gas sensing member U1 pin 3 respectively, transformer T coil L3 two ends connect rectifier bridge Q pin 1 and rectifier bridge Q pin 3 respectively, gas sensing member U1 pin 4 is contact resistance R2 respectively, resistance R3, potentiometer RP1 one end, potentiometer RP1 slide plate, diode VD6 negative pole, relay K coil, rectifier bridge Q pin 4 and electric capacity C1, the resistance R2 the other end is connecting triode VT3 base stage and triode VT1 collector electrode respectively, triode VT1 base stage connects gas sensing member U12 and resistance R1 respectively, the resistance R1 the other end connects the electric capacity C1 the other end respectively, rectifier bridge Q pin 3, resistance R4, resistance R5, resistance R6 and triode VT4 emitter, the resistance R4 the other end is connecting triode VT1 emitter and triode VT2 emitter respectively, triode VT2 collector electrode is connecting triode VT3 collector electrode and the resistance R3 the other end respectively, triode VT3 emitter connects diode VD5 positive pole, diode VD5 negative pole is connecting triode VT4 base stage and the resistance R6 the other end respectively, triode VT4 collector electrode connects diode VD6 positive pole and the relay K coil the other end respectively.
As the utility model further scheme: described gas sensing member U1 adopts HQ-2.
Compared with prior art, the beneficial effects of the utility model are: the utility model ventilator control system, whole circuit is controlled by using cheap gas sensing member U1 and some exterior electrical components, not only structure is simple, and make the cost of whole system lower, automatic control can be realized, be applicable to the demand of various different client, long service life.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of ventilator control system.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technological scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, in the utility model embodiment, a kind of ventilator control system, comprise transformer T, relay K, triode VT1, rectifier bridge Q, gas sensing member U1 and resistance R1, transformer T coil L1 one end connects 220V Ac one end and relay K contact K-1 respectively, the relay K contact K-1 the other end connects ventilation fan one end, the ventilation fan the other end is the connection transformer T coil L1 the other end and the 220V Ac the other end respectively, transformer T coil L2 two ends connect gas sensing member U1 pin 1 and gas sensing member U1 pin 3 respectively, transformer T coil L3 two ends connect rectifier bridge Q pin 1 and rectifier bridge Q pin 3 respectively, gas sensing member U1 pin 4 is contact resistance R2 respectively, resistance R3, potentiometer RP1 one end, potentiometer RP1 slide plate, diode VD6 negative pole, relay K coil, rectifier bridge Q pin 4 and electric capacity C1, the resistance R2 the other end is connecting triode VT3 base stage and triode VT1 collector electrode respectively, triode VT1 base stage connects gas sensing member U12 and resistance R1 respectively, the resistance R1 the other end connects the electric capacity C1 the other end respectively, rectifier bridge Q pin 3, resistance R4, resistance R5, resistance R6 and triode VT4 emitter, the resistance R4 the other end is connecting triode VT1 emitter and triode VT2 emitter respectively, triode VT2 collector electrode is connecting triode VT3 collector electrode and the resistance R3 the other end respectively, triode VT3 emitter connects diode VD5 positive pole, diode VD5 negative pole is connecting triode VT4 base stage and the resistance R6 the other end respectively, triode VT4 collector electrode connects diode VD6 positive pole and the relay K coil the other end respectively.
Gas sensing member U1 adopts HQ-2.
Working principle of the present utility model is: refer to Fig. 1, triode VT1 and VT2 forms difference amplifier, U1, R1, RP1 and VT3 form the input bridge of difference amplifier, adjusting RP1 at ordinary times makes difference amplifier export negative pressure (namely VT1 collector voltage is higher than VT2 collector voltage), and the emitter junction due to VT3 is connected on the output terminal of difference amplifier, and this negative pressure makes VT3 end, now, VT3 collector electrode no current flows through, and VT4 also ends, relay K not adhesive.
When experiencing the harmful gases such as smog as U1, U1 internal resistance value diminishes, and now the input bridge of difference amplifier changes original state, so VT1 collector potential starts to decline, VT2 collector potential will rise.
When indoor harmful gas concentration buildup to a certain extent, the output voltage of difference amplifier becomes malleation (namely the collector voltage of VT2 is higher than VT1 collector voltage), and when increasing to a certain degree, VT3 saturation conduction, so the voltage on R6 increases, VT4 is saturation conduction also, and relay K adhesive, ventilation fan is started working.
Along with the vitiated air of indoor is clean by pump drainage, the internal resistance resistance of U1 increases gradually, and when resistance increases to a certain degree, will make VT3 release and saturatedly transfer cut-off to, now VT4 also ends, and relay K power-off release, ventilation fan quits work.
To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the utility model.Any reference character in claim should be considered as the claim involved by limiting.
In addition, be to be understood that, although this specification is described according to mode of execution, but not each mode of execution only comprises an independently technological scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should by specification integrally, and the technological scheme in each embodiment also through appropriately combined, can form other mode of executions that it will be appreciated by those skilled in the art that.
Claims (2)
1. a ventilator control system, comprise transformer T, relay K, triode VT1, rectifier bridge Q, gas sensing member U1 and resistance R1, it is characterized in that, described transformer T coil L1 one end connects 220V Ac one end and relay K contact K-1 respectively, the relay K contact K-1 the other end connects ventilation fan one end, the ventilation fan the other end is the connection transformer T coil L1 the other end and the 220V Ac the other end respectively, transformer T coil L2 two ends connect gas sensing member U1 pin 1 and gas sensing member U1 pin 3 respectively, transformer T coil L3 two ends connect rectifier bridge Q pin 1 and rectifier bridge Q pin 3 respectively, gas sensing member U1 pin 4 is contact resistance R2 respectively, resistance R3, potentiometer RP1 one end, potentiometer RP1 slide plate, diode VD6 negative pole, relay K coil, rectifier bridge Q pin 4 and electric capacity C1, the resistance R2 the other end is connecting triode VT3 base stage and triode VT1 collector electrode respectively, triode VT1 base stage connects gas sensing member U12 and resistance R1 respectively, the resistance R1 the other end connects the electric capacity C1 the other end respectively, rectifier bridge Q pin 3, resistance R4, resistance R5, resistance R6 and triode VT4 emitter, the resistance R4 the other end is connecting triode VT1 emitter and triode VT2 emitter respectively, triode VT2 collector electrode is connecting triode VT3 collector electrode and the resistance R3 the other end respectively, triode VT3 emitter connects diode VD5 positive pole, diode VD5 negative pole is connecting triode VT4 base stage and the resistance R6 the other end respectively, triode VT4 collector electrode connects diode VD6 positive pole and the relay K coil the other end respectively.
2. ventilator control system according to claim 1, is characterized in that, described gas sensing member U1 adopts HQ-2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520607817.5U CN204985015U (en) | 2015-08-13 | 2015-08-13 | Scavenger fan control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520607817.5U CN204985015U (en) | 2015-08-13 | 2015-08-13 | Scavenger fan control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204985015U true CN204985015U (en) | 2016-01-20 |
Family
ID=55119389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520607817.5U Expired - Fee Related CN204985015U (en) | 2015-08-13 | 2015-08-13 | Scavenger fan control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204985015U (en) |
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2015
- 2015-08-13 CN CN201520607817.5U patent/CN204985015U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160120 Termination date: 20190813 |