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1. Purpose of the product.
1.1. The ER-4 electric dryer is designed for drying hands with warm air in public places.
2. Technical characteristics.
2.1. Voltage, V - 220
2.2. Current frequency, Hz - 50
2.3. Power consumption, W, no more - 1350
2.4. Outgoing air speed, m / s, not less - 11
2.5. Exceeding the temperature of the outgoing air over the ambient air temperature, ºС, not less than - 30
2.6. Rated power of the electric motor, W - 10
2.7. Rated speed of rotation of the electric motor, rpm - 2550
2.8. Time relay delay time, s - 60 ± 25
2.9. Overall dimensions, mm:
- length - 230
- width - 202
- Height - 193
2.10. Electric dryer weight, kg, no more - 4.2
3. Device and principle of operation.
3.1. An electric dryer is a wall-mounted device consisting of the following main units (Fig. 1):
- electric motor - 6,
- fan - 4,
- heater - 3 and
- time relay - 7.
Figure: 1. Electric dryer ER-4 (dimensional drawing):
- 1 - case; 2 - wall; 3 - heater; 4 - fan; 5 - base;
- 6 - electric motor; 7 - time relay; 8 - guide; 9 - capacitor;
- 10 - terminal block; 11 - screw; 12 - screw; 13 - button.
On the base 5, made of impact-resistant polystyrene, the fan and the capacitor of the electric motor are fastened with screws. 9.
- On the front wall of the housing 1, also made of impact-resistant polystyrene, a mirror is mounted.
- A thermal protection (fusible link) is mounted in the area of the heater coil, which melts when the permissible temperature is exceeded.
- Electric motors, on the shaft of which the fan turbine is mounted, are fixed to the fan casing with screws.
- The heater coil is made of high ohmic resistance wire and is wound on a refractory frame.
- Coil resistance 36 ohms.
- The ends of the spiral are connected to terminal block 10.
- The time relay switches the power supply circuit of the electric dryer through the contacts of the microswitch.
3.2. After pressing button 13 (Fig. 1), the contacts of the time relay are closed, and the electric current flows simultaneously into the electric motor and the heater (Fig. 2).
Figure: 2. Electrical schematic diagram:
a) with an electric motor DKV-10, 6) with an electric motor AD-10-2 / 45A1;
E - heater; Q - switch; F - fusible element;
M - electric motor; C is a capacitor.
Note. The electric dryer can be equipped with an electric motor DKV-10 or AD-10-2 / 45A1. Refer to the corresponding wiring diagram depending on the installed motor.
The electric motor starts and drives the fan turbine. The air drawn in, passing through the heater, is heated and pushed out through the guide 8 (Fig. 1).
Electronics ZP-01
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Charging and starting device "Electronics ZP-01".
Principle electrical circuit.
* selected when regulating
1. All parameters of the circuit are measured when the device is operating in the "Charge" mode on the equivalent load with an active resistance equal to (1.3 ± 0.13) Ohm.
In this case, the charge current is (8.0 ± 0.5) A, the supply voltage is (220 ± 4.4) V.
2. Constant voltage and oscillograms were taken relative to point 18.
3. Oscillograms were taken using an S1-68 oscilloscope.
The rest of the voltages were measured with a combined device Ts4317 and may differ from those shown in the diagram by no more than 20 ٪.
4. A transistor without a reference designation should be read VT3 - KT203AM.
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