How to Repair a hair dryer with their hands

Content

The device and principle of operation

In all models, the same set of components:

• housing;
• fan;
• heating element;
• control module;
• power cord;

In a nutshell, the principle of operation can be described as follows. Fan, sucking air from the outside, sends it to the nozzle, which has a spiral. If it is enabled, the outward flow of hot air will flow.

The housing is made of durable, temperature-resistant plastic. Fan is collected at the collector DC motors. Powered by a motor voltage 12, 18, 24 or 36 volts. Rare engines alternating current at 220 volts.

Heater using a special frame. Make it a material that does not conduct electricity and is unable to burn. At frame nichrome wire wound into a spiral. By the number of modes of the device makes the number of spiral sections.

When the temperature of the heating element rises. If it is not cooled, the fire can occur in a matter of seconds. The role of the cooler performs fan.

In case the fan stops working, the thermostat is provided. A pair of closed contacts disposed on the bimetallic plate. The plate is fixed to the frame to the heater.

When the device switches on, the thermostat is blown with hot air. When the element temperature rises to a critical, contacts are opened in a spiral. It is thought up to make the time to turn off the heating element.

To control the operation of the thermostat, sometimes mounted thermal fuse. He is a one-time action. In case of overheating it just burns, interrupting the electrical circuit of the heater, causing the device is forced to turn off.

Schematic diagram of conventional apparatus

Most of the fen is working on a concept diagram.

The heater consists of three helices. Request through the first electric motor, and the other two are heated. When the switch is in the "off" position, the circuit is de-energized.

If you turn the first mode, the food passes through the diode, which isolates one half-wave of the alternating voltage. In this position, only the second heating coil is turned on, but not to the full. The motor rotates at low speed and outputs the minimum power device.

In the second mode, the diode is short-circuited and the circuit utilizes both half-wave of the AC voltage. The second spiral begins to operate at full capacity. Motor gaining momentum and gaining hairdryer average power.

In the third mode, Request more and the third coil and the machine runs at full capacity. If you are working to push the button «cool», it will simply force to disconnect the second and third spiral, leaving cold air cooling. Motor unit will continue to operate.

When the commutator motor there noise. To reduce it, in the scheme of connecting the two coils and a pair of capacitors.

Necessarily the presence of the thermostat in case a sudden stop working fan. As well as a full-wave rectifier of four diodes to reduce voltage to the right, the motor.

How to disassemble the machine

The housing is held together with screws and latches. If you are lucky, you are the first time, will be able to make out the hair dryer. Manufacturers are trying as much as possible to complicate the process and prevent hair dryer disassembled into parts.

Each brand has its own service workshop with their experts on dismantling. Turning to these services, you bring extra income to the manufacturer. That's because they are trying not to give to repair the appliance yourself and go to various tricks. For example, the heads of the screws do not loosen the ordinary screwdriver. You need a set with curly bits.

Own head trying to hide behind labels or plastic caps. Latches or disconnected, or not. Even repairers can not make out sometimes and just give them a break, so as not to suffer.

Common Problems and Troubleshooting

Common causes of faults, which can cope with their own hands.

Your device shows no signs of life

Most likely, no power is supplied to the motor. Start looking for reasons why you need with the most simple. In this case, you need to check whether there is power in the socket. This can be done with a screwdriver indicator. If the socket is all right, that takes the power cord.

Carefully inspect it for kinks, oplyvov and cuts. The most problematic areas - the plugs and at the junction with the body. If you do not find anything, you have to disassemble the cabinet and check the reliability of the contacts. Perhaps the cord just fell off the engine and re-soldering will solve this problem.

Once you get hair, it is possible to silence the reason immediately rush into your eyes. Carefully inspect all the contacts, the fan and the heating element.

Pick up a control module card and check for cracks and burnt parts. Found crack can be easily repaired by brazing, and track the newly covered with solder.

Spoiled swell capacitors, resistors blacken. They need to unsolder and replace whole. Check the fuse - perhaps it burned.

If nothing catches your eye, then keep checking the cord. Disconnect it and rang the tester. In the event of breakage, the cord is changed to a new one.

How to check the on / off button? It is still aligned with the mode switch. Disconnect the wires from it and direct short-circuit them. If the hair began to blow again, then I click on the new one. Before disconnecting the wires, it is advisable to photograph them. This will help in the reverse connection.

In the same way, you can check the thermostat. Connect the wires without him.

Drives only cold air

Ragged spiral - this is the first thing that catches your eye at the opening of the inner housing. Remedy breakdown:

1. Completely replace the heating element to the new.
2. Shove the break point in the thin copper or brass tube and carefully compress.
3. Seal the ends with a clamping contact.
4. Just throw the twisted ends, one to another.
5. Twist them together.

On the first point. Where can I get a new spiral? You can buy ready-made. Take out the old dryer if he stayed. It is possible to wind the nichrome wire.

Repair of the second item to obtain reliable, if the hand is a piece of the desired handset.

Not inferior in quality to the third method. The plate which constitutes the frame of the heating element, a small hole is drilled under the bolt or screw. Anchoring cliffs on the bolt between the two goals. And firmly tighten the screws.

The fourth and fifth methods - time. Location of such a compound will burn in a short time because of the increased resistance.

The fan runs with binding or does not rotate at all

This could be for two reasons:

1. On impeller tangled hair.
2. Clogged duct.

Reaching the fan impeller, remove and clean the hair. In the model filter can be. Remove it and clean.

Problems with motor

If you feel an unpleasant burning smell from your device, then this is the most disappointing of breakdowns. So downtime reason burnt windings. can be replaced with a new engine in the home. Engaged in its repair is necessary in the workshop. But there are likely to be offered to replace him.

If your device will from time to time to spark, it is possible for some time to eliminate this problem. Completely disassemble the engine and smooth out the surface under the brush. To improve communications, wipe these places alcohol. can at the same time to grease the motor shaft.

It is believed that professional devices do not differ much from the household. And if you deal with the repair of home hair dryer with your hands, then just as easily be able to fix the hairdresser's equipment. Repair Wizard does not advise to fix things at home.

We have tried to make out all of the major causes of failures of domestic hair dryer. And if there are at least some uncertainty, it is a direct path to a service workshop. At the beginning of the conversation with the master to find out the cost of repair. It may come cheaper to buy a new one.