The output of the constant current source set a low voltage electromagnetic relay K1. The contacts of this relay included in the circuit of supply pump. Now, as you may have guessed, when you enable the intake valves of the washing machine will turn on relay K1 and motor M1 of the injection pump. When the valve in the washing machine will turn off, the pump will automatically turn off. This combo will work in cycles indefinitely. And stand by the washing machine will not have to.
To connect the pump directly to terminals of solenoid valves washing machines can not — due to the large current consumption of the pump will burn electrician CM.
In the diagram (Fig. 1) shows a step-down transformer T1 with an output alternating voltage at the secondary winding 8 — 10, rectifier diodes VD1 — VD4. Oxide capacitor C1 (of the type K50-24 or similar) inserted in the scheme for smoothing of pulsations on nutrition. Relay K1 applied automobile, like 3747-06 designed for a trigger voltage of 12 V. However, you can apply both, for example WJ118-1S, Omron G2R-112R-V, TRU-5VDC-SB-SL TTI-TRD-9VDC-FB-CL Relpol RM85-2011-35-1012, BV2091 Pasi SRUH-SH-112DM, FRS10С-03 or similar. It is important that the relay contacts provided safe switching of load current less than 3 A.
The diagram shows a piezoelectric capsule with a built-in sound generator HA1, connected in parallel to the relay, and HL1 led is connected in series with a current limiting resistor R1. These elements respectively provide audible and visual indicator of the pump (and intake valves of the washing machine). If such an indication (or part of it) will seem redundant, the relevant elements of the schema are removed.
The HA1 primer can be any, calculated on the voltage 9 — 15 V, for example FMQ2715D, FXP1205 (single-tone sound), KPI4332-12 (intermittent sound), KPS4518 (dual tone siren) or similar.
Photo 3. View of the connected terminal block with the cover removed, of a washing machine
The rectifier shown in the diagram (Fig.1), is applicable to any if only it provided DC output current more than 70 mA when the DC output voltage 12 — 15 V. It can be industrial rectifier or power supply, such as radio or cautery device. Adapters for cell phones here to use useless, since the output current is insufficient to power the relay.
Here in this simple way, you can automate almost any washing machine in the village and wash in the city. Don’t need to find the master installer, who will charge you for the work of a lot of money.
You will need to open the top cover of the washing machine and connected in parallel electromagnetic valves, installing terminal block. If your washing machine is out of warranty, unauthorized opening of the cover you could lose it. Here everyone chooses itself: or to suffer, until the end of the warranty, or to buy “beushnye” washing machine, and then do in accordance with the above recommendations and to wash clothes with comfort.
A. KASHKAROV, St. Petersburg