CN203606704U

CN203606704U - Water level automatic control circuit

Info

Publication number: CN203606704U
Application number: CN201320723458.0U
Authority: CN
Inventors: 周智
Original assignee: Chongqing Medo Food Co Ltd
Current assignee: Chongqing Medo Food Co Ltd
Priority date: 2013-11-15
Filing date: 2013-11-15
Publication date: 2014-05-21
Anticipated expiration: 2023-11-15

Abstract

The utility model provides a water level automatic control circuit. The water level automatic control circuit comprises NPN triodes (T1, T2, T3), NAND gates (N1, N2, N3), resistors (R1, R2, R3, R4), relays (D1, D2), a 12V DC power supply and a 220V AC power supply. The principle is mainly that contacts are arranged in a water tank, when the two contacts are immersed in water, signals are amplified through the triodes, high and low levels are changed through the NAND gates, then the relays are driven to control a water pump, and therefore the automatic control of the water level is achieved.

Description

Water level automatic control circuit

Technical field

The utility model relates to circuit field, particularly relates to a kind of automatic control circuit.

Background technology

In spring mineral water production run, need to monitor the water in water tank, when water level need to add water during lower than a certain position inwards, after being added to certain position, water needs to stop adding water, if by manually controlling, efficiency will be very low.Although, in prior art, also have the circuit of similar automatic control, when its stability often not high and circuit is more complicated.

Utility model content

In view of the above, the purpose of this utility model is to provide a kind of water level automatic control circuit, for solving prior art for the not high problem of cistern water level control efficiency.

For achieving the above object and other relevant objects, the utility model provides a kind of water level automatic control circuit, and this circuit comprises NPN triode T1, T2, T3, Sheffer stroke gate N1, N2, N3, resistance R 1, R2, R3, R4, relay D1, D2,12V direct supply and 220V AC power, described resistance R 1, R2, one end of R4 successively with described NPN triode T1, T2, the base stage of T3 connects, described NPN triode T1, T2, the collector of T3 is connected with 12V direct supply respectively, described NPN triode T1, the transmitter of T3 respectively with relay D1, ground connection after the iron coil series connection of D2, the emitter of described NPN triode T2 connect with described resistance R 3 after ground connection, two input ends of described Sheffer stroke gate N1 are connected to the emitter of described NPN triode T2 simultaneously, output terminal is connected with the first input end of described Sheffer stroke gate N2, the output terminal of described Sheffer stroke gate N2 is connected to the first input end of described Sheffer stroke gate N3, the second input end of described Sheffer stroke gate N2 and the output terminal of Sheffer stroke gate N3 are connected to the other end of described resistance R 4 simultaneously, the second input end of described Sheffer stroke gate is connected to the COM end of described relay D1, the described NO end of stating relay D1 connects described 12V direct supply, COM end and the NO end of described relay D2 are connected to described water pump, described resistance R 1, the other end of R2 is connected to respectively low-water level place default in described water tank and high water stage place, described 12V direct supply is also connected to described water tank bottom simultaneously.

As mentioned above, the utlity model has following beneficial effect: the described water level automatic control circuit forming by simple circuit component, can automatically realize the control for water pump.

Accompanying drawing explanation

In order to be illustrated more clearly in the scheme in the utility model embodiment, to accompanying drawing that describe required use in specific embodiment be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those skilled in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.

The structural representation of the water level automatic control circuit that Fig. 1 provides for the utility model one specific embodiment.

Drawing reference numeral explanation

1 water tank

2 water pumps

3 automatic control circuits

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only a part of embodiment of the present utility model, rather than whole embodiment.Based on embodiment of the present utility model, all other embodiment that those of ordinary skills obtain under the prerequisite of not making creative work, belong to the scope that the utility model is protected.

Please refer to Fig. 1, show the structural representation of the water level automatic control circuit that the utility model one specific embodiment provides, as can be seen from Fig., this water level automatic control circuit 3 comprises NPN triode T1, T2, T3, Sheffer stroke gate N1, N2, N3, resistance R 1, R2, R3, R4, relay D1, D2,12V direct supply and 220V AC power, described resistance R 1, R2, one end of R4 successively with described NPN triode T1, T2, the base stage of T3 connects, described NPN triode T1, T2, the collector of T3 is connected with 12V direct supply respectively, described NPN triode T1, the transmitter of T3 respectively with relay D1, ground connection after the iron coil series connection of D2, the emitter of described NPN triode T2 connect with described resistance R 3 after ground connection, two input ends of described Sheffer stroke gate N1 are connected to the emitter of described NPN triode T2 simultaneously, output terminal is connected with the first input end of described Sheffer stroke gate N2, the output terminal of described Sheffer stroke gate N2 is connected to the first input end of described Sheffer stroke gate N3, the second input end of described Sheffer stroke gate N2 and the output terminal of Sheffer stroke gate N3 are connected to the other end of described resistance R 4 simultaneously, the second input end of described Sheffer stroke gate is connected to the COM end of described relay D1, the described NO end of stating relay D1 connects described 12V direct supply, COM end and the NO end of described relay D2 are connected to described water pump 2, described resistance R 1, the other end of R2 is connected to respectively low-water level place default in described water tank 1 and high water stage place, described 12V direct supply is also connected to described water tank 1 bottom simultaneously.

Particularly, have two detection probe " A " and " B " in water tank, wherein " A " is lower limit water-level probe, and " B " is upper limit water-level probe, and 12V direct supply is received probe " C ", and it is the lowest water level that stores water in water tank, and specific works principle is as follows:

Lower limit water-level probe " A " is connected to the base stage of transistor T 1, and its collector is linked 12V power supply, and emitter is linked relay D1,9 pin of relay D1 access Sheffer stroke gate N3.Equally, upper limit water-level probe " B " is received the base stage of transistor T 2, its collector is linked 12V power supply, emitter is through resistance R 3 ground connection, and

access

1,2 pin of Sheffer stroke gate N1, and output 4 pin of Sheffer stroke gate N2 and 8 pin of Sheffer stroke gate N3 are connected, and 7 pin of N3 are connected to the 6 pin input ends of N2, and be connected with the base stage of transistor T 3 through resistance R 4, the relay D2 being connected with transistor T 3 emitters is used for driving motor M.

When water tank to water level below probe A, transistor T 1 and all not conductings of T2, N3 exports high level, transistor T 3 conductings make relay D2 have electric current to pass through to move, thereby motor work, start water suction water tank.In the time that the water level of water tank is more than probe A, below probe B, water in water tank provides base voltage to transistor T 1, makes T1 conducting, and 9 pin that relay Dl obtains electric adhesive N3 are high level, because transistor T 2 there is no base voltage, and in cut-off state, 1,2 pin of N1 are input as low level, output 3 pin are high level, and the 6 pin input ends of N2 are still high level, thereby the 4 pin outputs of N2 be low level, finally 7 pin of N3 are output as high level, and motor continues water suction water tank.In the time that the water level of water tank exceedes upper limit water level B, transistor T 1 still obtains base voltage, relay Dl adhesive.9 pin of N3 are still high level, and meanwhile, the water in water tank provides base voltage to make its conducting also to

transistor T

2,1, the 2 pin input ends of Nl are high level, and the 2nd pin output terminal is low level, and N2 output terminal is high level, the whole output low level of 7 pin of N3, makes T3 cut-off, and motor stops pumping.

If be reduced to probe B under water level but higher than probe A, water in water tank is still supplied with the base voltage of transistor T 1, relay Dl continues adhesive, and 9 pin that make N3 are still high level, but transistor T 2 not conductings, 1, the 2 pin input ends of N1 are low level, its the 3rd pin output terminal is high level, and N2 the 6th pin is low level, and N2 the 4th pin is output as high level, the 7 pin output terminals of final N3 continue to keep low level, and motor still quits work; If water level drops to below probe A, transistor T 1 and all not conductings of T2, Sheffer stroke gate N3 exports high level, drives relay D2, and motor starts again water suction water tank.

Need to it being understood that as long as described high water stage and low-water level are respectively connect to a phase inverter and can change this circuit into spilling water automatic control circuit.

In sum, the described water level automatic control circuit 3 that the utility model consists of simple circuit component, can realize the control for water pump 2 automatically.So the utility model has effectively overcome various shortcoming of the prior art and tool high industrial utilization.

Claims

1. a water level automatic control circuit, is connected between water tank and water pump, it is characterized in that, described circuit comprises: NPN triode T1, T2, T3, Sheffer stroke gate N1, N2, N3, resistance R 1, R2, R3, R4, relay D1, D2,12V direct supply and 220V AC power, described resistance R 1, R2, one end of R4 successively with described NPN triode T1, T2, the base stage of T3 connects, described NPN triode T1, T2, the collector of T3 is connected with 12V direct supply respectively, described NPN triode T1, the transmitter of T3 respectively with relay D1, ground connection after the iron coil series connection of D2, the emitter of described NPN triode T2 connect with described resistance R 3 after ground connection, two input ends of described Sheffer stroke gate N1 are connected to the emitter of described NPN triode T2 simultaneously, output terminal is connected with the first input end of described Sheffer stroke gate N2, the output terminal of described Sheffer stroke gate N2 is connected to the first input end of described Sheffer stroke gate N3, the second input end of described Sheffer stroke gate N2 and the output terminal of Sheffer stroke gate N3 are connected to the other end of described resistance R 4 simultaneously, the second input end of described Sheffer stroke gate is connected to the COM end of described relay D1, the described NO end of stating relay D1 connects described 12V direct supply, COM end and the NO end of described relay D2 are connected to described water pump, described resistance R 1, the other end of R2 is connected to respectively low-water level place default in described water tank and high water stage place, described 12V direct supply is also connected to described water tank bottom simultaneously.