DIY bosch brilliantcare hair dryer repair

Household hair dryer operation

The hair dryer operates on a 220 V, 50 Hz network. Any hair dryer has two main parts - a heating element and an electric motor.

As a rule, a nichrome spiral is used as a heating element, it is it that provides warm air. In hair dryers, DC electric motors with a power of up to 50 watts are mainly used, there are exceptions.

Passing through the spiral, the current loses its initial strength, since the spiral has a certain resistance, it is this current that is rectified by the diode bridge and supplied to the electric motor.

Electric motors in hair dryers are designed for voltages of 12, 24 and 36 volts, only in very rare models electric motors with a power supply of 220 volts are used, in this case, the voltage from the network is directly supplied to the electric motor. A screw (propeller) is attached to the rotor of the engine, which provides heat removal from the spiral, it is thanks to this that a sufficiently strong directed flow of warm air is obtained at the outlet. The power of the hair dryer depends on the thickness of the coil used and the power of the installed electric motor.

The brought hair dryer was disassembled, it turned out that the problem was a broken track on the board with switches. After filling it with solder, the device started working normally.

But most often, the main reasons for inoperability are a broken spiral, an inoperative engine, contacts of switches that have melted from heat, a broken mains wire or plug.

What the hair dryer consists of:

Elements in the diagram: 1 - diffuser nozzle, 2 - body, 3 - air duct, 4 - handle, 5 - cord twist guard, 6 - “Cold air” mode button, 7 - air flow temperature switch, 8 - flow rate switch air, 9 - "Turbo" mode button - maximum air flow, 10 - a loop for hanging a hair dryer.

Wiring diagram for a simple hair dryer

The electric motor is supplied with a DC voltage obtained by means of a diode bridge consisting of four diodes (or simply from one diode).

Let us single out two elements of the circuit that are consumers (loads), these are the spiral and the diode bridge (the motor is not counted, since it is the load of the bridge). In the circuit, the elements are located in series (one after the other), which means that the voltage drop across each of them will depend on its resistance and their sum will be equal to the mains voltage at the third position of the switch.

Most of the entry-level hair dryers have a simple wiring diagram, in such hair dryers there is only one switch that turns on the fan and heating element. Heaters can be made in various modifications, but in all hair dryers they are made of nichrome coiled into a spring.

However, almost all simple modern hair dryers have 2-3 steps of power and air flow regulation.

More advanced hair dryers have smooth controls for the airflow speed and air temperature.

Rules for the use of hair dryers

The recommended maximum run time is 5 minutes. At the end of the work, remove the temperature regulator to a minimum, leave it on a cold blower for half a minute, and only then turn off the hair dryer. Try not to take it with wet hands, otherwise moisture may get on the internal elements of the circuit, which can lead to a short circuit.

In everyday life, a large number of electrical appliances are used to make life easier for the layman. But any technique tends to fail over time. Repairing a hair dryer can be easily done with your own hands at home, without asking for help from a service center.

A hair dryer is a device that is used to dry and style hair. It consists of the following structural elements:

1. Engine;
2. TEN - heating element;
3. Fan;
4. Thermal protection;
5. Power cable;
6. Regulators (fan speed, temperature, etc.).

The principle of operation of the household hair dryer is based on a low-voltage DC collector motor. In order for the device to turn on, a special lowering coil is used in its design, which helps to drop the voltage to the required level. It is installed inside the heating element. With the help of a diode bridge, the voltage is rectified. The engine has a steel shaft on which a fan is mounted (in most cases, it is made of plastic, although there are now professional models with metal blades). The fan can have two, three or even four blades.

Photo - hair dryer design

The heating element of an electric hair dryer is presented in the form of a spiral with a nichrome wire. It is wound on a non-combustible base, which increases the safety when using the device. When plugged in, the coil begins to heat up, and the fan installed behind it blows warm air out of the hair dryer case. To protect against overheating, a temperature controller (adjustable during operation) and a thermostat are used. In addition, any hair dryer has a "cold wind" or "cool" button - when you press it, the spiral stops heating up, only the engine and the fan remain to work, respectively, cold air blows from the nozzle.

Photo - filter

It should be noted that not all equipment has a thermostat. It is designed to control the heating of a block with nichrome during long-term operation of the device. For example, it can be a stationary professional hairdryer (used in hairdressing salons). When the coil reaches its maximum allowable temperature, the thermostat cuts off the power. After cooling, the contacts are turned back on.

Photo - nichrome spiral

Typical malfunctions of the Bosch LCD hair dryer (Bosch), Valera, Skil, Vitek, Scarlett (Scarlet) and others:

1. Smells burnt. The smell can come from the coil, which has gotten the hair as a result of careless handling, or from burning of the internal parts of the circuit;
2. Hair dryer does not turn on. The reason may be a breakdown of the engine, a broken power cord, a lack of voltage in the network;
3. Decreased work efficiency. The power of the device depends on the cleanliness of the filter installed on the back of the case. If it gets clogged, then the device will start to work with less efficiency;
4. The fan rotates very slowly. Most likely, something just bothers him;
5. Hair dryer Braun (Brown), Philips (Philips) or Rowenta (Roventa) does not heat up. There are several reasons why this happens: the cold air button is blocked, the spiral is broken, the circuit is damaged, the thermostat does not work.

Photo - model for drying hair

Before starting repairs, you need to know how to disassemble a Parlux, Saturn, Moser or Jaguar hairdryer yourself. There is nothing complicated in this, you just need an instruction and a screwdriver:

1. There are two bolts on the back of the body. They need to be unscrewed and carefully removed. In some cases, there are more of them, make sure that all fasteners are removed;
2. In parallel, you can also remove the cover from the top panel - there is a fan under it. It is most often simply pressed against the body, so it comes out without problems if you pry it with a screwdriver;
3. Under the top panel of the case there is a mode switch and a cold air button. Several wires are installed on the panel. Which are connected to the pins of the circuit. For further disassembly, they will need to be removed;
4. Now you can remove the coil from the hair dryer head. It is necessary to act carefully, otherwise it may break, remove only after making sure that all fasteners have been removed;
5. Under the spiral, respectively, there is a motor. Most often there is no need to get it, because.almost all malfunctions will be noticeable immediately at the place where the motor is connected to the contacts of the heating element. An exception is the need to replace a part, then a major repair is made.

Consider how to make an independent repair of a hairdryer Babyliss, Rowenta Brush Activ, Bosh, Remington and others at home. First of all, you need to clean the fan and motor shaft from hair. A lot of them are collected there even after several months of intensive use. To do this, you need to remove the back top panel and cut the hair, then simply remove it with tweezers or fingers. In no case should you wipe the parts with a damp cloth - this will damage the contacts. This is done anyway, regardless of the problem.

Photo - fan

If it smells burnt, then you need to repair the spiral and filter. They can be cleaned with a dry soft brush. Just wipe the heater teeth and clean the filter. Be careful not to break the contacts during the cleaning process.

Photo - Cleaning

If the hair dryer does not turn on, then you need to check the power cable right away. Most often, it breaks at the base, because during operation, the hair dryer rotates many times in different directions along its axis. If everything is fine with him, then look at the contacts on the spiral. They can be 2, 3 or 4. When the device falls or hits, they sometimes get unsoldered, which causes the motor power to be cut off.

When the breakdown is related to the fan, it is as easy as shelling pears to repair the device. The first step is to check if the blades are intact. Of course, the efficiency of their work does not change too much from their state, but if cracks or notches are noticed, then it is better to immediately change the propeller. Then inspect the shaft. Sometimes small parts or other debris fall into the nozzle of the hair dryer, blocking the shaft, and it starts to spin slowly.

Now let's discuss the reasons why the spiral of dry warm air does not heat up with a professional Coifin, Steinel or Lukey hairdryer. As we said, there can be several reasons. For example, the cold air button is stuck. The principle of its operation is as follows: when you press the button, the contacts inside the case open, as a result of which the heating coil stops working. If it is open all the time, then the spiral simply cannot start heating. If the problem is not in the button itself, but in the contact, then you need to solder it yourself.

The cause of the breakdown may lie in the broken coil, its repair is a little more difficult to carry out than cleaning. In some models, it is made of low-quality material that breaks easily from impact. If some notches are missing on the base or mother-in-law is visible, it is replaced.

Video: how to repair a spiral in a hair dryer

Do-it-yourself hair dryer repair can be done easily Repair of household appliances sometimes costs "a pretty penny", so many are ready to study this topic on their own in order to save family budget funds. And the quality will be guaranteed with a competent approach.

Despite the seeming complexity, it is quite possible to repair a household hair dryer without the help of professionals. You need to arm yourself with theoretical knowledge about the internal structure of the device and the necessary tools.

The device with which we dry our hair and make styling is simple.

The body consists of 2 plastic containers, fastened together with screws. In some models, instead of such fasteners, special latches are used. The trick lies in the fact that such elements are of no practical use and are most often a conditional fastening. The fan is one of the main components.

The function is:

• Cooling of heated parts;
• Closing the power supply circuit of the spirals in the device;
• Starting the engine.

The hairdryer is simple enough

The electric motor is a low-voltage collector motor based on a single diode (as in Scarlett) or in more expensive models (like Remington or Babyliss) - a diode bridge that provides voltage rectification and attached to the motor contacts in the form of a hinged mount. With the help of a capacitor, the batteries are matched, or an inductive coil can cope with this.

It happens that when you try to turn on the hairdryer, the device does not start and the engine does not start. Or, after a short time of operation, the hairdryer turns off.

There are several options for malfunction:

• The presence of breaks in the cable;
• Defective electrical outlet;
• Lack of electricity;
• Damage to the motor.

There are several faults with the hair dryer, which are most common.

Most often, when the hair dryer stops turning on or breaks down altogether, external changes occur in the operation of the device, such as the appearance of a burning smell. The reason may be that during the drying process of the hair, their particles got stuck in the hair dryer net and wound around the heating element. Or the situation is somewhat more complicated - the wires of the microcircuit burned out.

Decrease in drying quality is possible. The hair dryer starts to blow weakly and overheats in case of critical contamination of the filters on the back of the device.

If they become clogged, then the power of revolutions will decrease. It is possible to reduce the rotation speed of the fan blades. The reason is most often in the ingress of a foreign body into the hair dryer. If the hair dryer works only in the "Cold air" mode and does not heat up, here we can talk about such breakdowns as the blocking of the "Cool" button or the burnout of the spiral, damage to the microcircuit or the failure of the thermostat.

To start looking for the cause of the malfunctioning hair dryer, you just need to stock up on 2 things, the first of which is an instruction to the device, and the second is a sacral impeller and a flat screwdriver. Before getting started, you need to remember that the device must be disconnected from the power supply.

The procedure for disassembling a hair dryer (such as Remington d3700 or Maestro) includes:

1. Disassembly of the case. For this, all bolts and fasteners are carefully unscrewed and removed from the back of the device.
2. Removing the cover from the upper part of the case, masking the fan blades. As a rule, the fastening is done by pressing or using clamps. In this case, carefully lift the part with a knife or the end of a flathead screwdriver.
3. Sequential extraction of switches and regulators with wires connected to the microcircuit.
4. Inspection of the hair dryer for the removal of all fasteners.
5. Removing the heating element from the front of the appliance. The heating element must be removed very carefully in order to avoid its breakage or damage to the spiral.

The hair dryer must be disassembled in stages.

Next is the inspection of the electric motor for faults. If there is a breakdown in the motor, this will be noticeable by the color and appearance of the contacts. Extraction is not required in this case. If the engine burns out completely, then we are already talking about the overhaul of the hair dryer and the replacement of the motor.

When starting to repair a household hair dryer, you should take into account the design features of a particular model and the specifics of the work of all its elements. The standard procedure for repairing such a device (suitable for all Bosch, Braun models, as well as Vitek, Bebilis and Brilliantcare with an ionizer) is to follow the steps.

First of all, it is necessary to clean the fan blades and the motor surface from the accumulated hairball:

• Remove the top cover from the back;
• We cut the hairs;
• We remove them with tweezers or using a brush.

It is important to remember about the inadmissibility of wet processing of the hair dryer spare parts, because after that the contacts will stop working. Next, carefully clean the coil and filters in case of overheating and the presence of a burning smell. To troubleshoot the connection of the hair dryer (or if it turns off), we inspect the cord for broken wires, especially at the base of the device.

For this purpose, special testers or indicator screwdrivers are used by connecting to the network.

Repair in this case is not recommended, it is better to replace the cord with a new one. Since there is a high probability of moisture getting into the place of insulation and closing the device. If no damage is found, you need to open and inspect the heating element and its contacts. In the case when the latter have moved away from the circuit, you need to use a soldering iron. We also pay attention to how the position switch began to work. If carbon deposits are found on it, we remove it with emery. In the event of a loss of contacts (when the hairdryer does not turn on), we solder. If the elements cannot be repaired, we replace them with new ones.

The specificity of the device is such that in some models (for example, Brown or Bosch) there is a function of selecting the air flow rate and heating intensity, while others have only separate regulators of the speed of rotation or the degree of heating (in the inexpensive Vitek or Scarlett models). The number of plastic blades is also different - there can be 2-3 and (as in industrial hairdryers) even 4. The heater consists of such parts as a spiral of wire with nichrome and a heat-resistant base under it. The hair dryer begins to heat up precisely due to the spiral. The number of windings in the spiral affects the number of switch modes.

A clear diagram of the disassembly of such hair dryers is as follows:

1. Disconnection of body parts with preliminary removal of the retaining ring.
2. Removing the covers by releasing the latches on the inside of the case.
3. Unscrewing 8 fasteners - 2 on the handle of the hair dryer, 3 from the side of the removable head, and 3 from the top of the casing.

Thermal protection is provided in the form of a configurable regulator and thermostat. The principle of operation of the latter is that when the permissible temperature threshold is exceeded, the terminals of such an element begin to diverge, and the circuit is opened. When the hair dryer cools down, the terminals are connected again, and you can dry your hair again. Another boundary in the path of hot air is a special fuse. If it is triggered, such an element will need to be changed. Also, on the outer panel of many hair dryers there is a button, thanks to which the device blows cold air. This function not only allows you to keep the hair healthy, but also stops the heating process of the coil.

The disassembly of the hair dryer must be started by disconnecting the parts of the case with the preliminary removal of the fastening ring

As a rule, for a household hair dryer to work, you need a constant electric current from 12-32 - 220V.

There are mode switches and regulators. Depending on the manufacturer, the number of speeds and the availability of additional options differs. The electrical circuit allows you to establish the relationship between all elements of the device.

Why is the fan and its blades inspected first - as it continues to work poorly after cleansing from hair, and involves looking for cracked parts in order to replace them. Also, inside the shaft there may be all sorts of small parts attracted by the hairdryer in the process of careless handling of the device.

Repairing a heating element includes repairing breaks in the coil by twisting the wire, using a soldering iron, or by tinning.

In the event of an engine breakdown, intense crackling will be heard from the hair dryer and even sparks will fly out in the area of ​​the blades. Then you need to solder the windings from the microcircuit and reconnect using triplets. But, in this case, it is best to contact the workshop, it is not so expensive (for example, disassembling Philips hair dryers in Moscow will cost only $ 4). If everything is in order with the windings, pay attention to the brushes and whether they fit tightly enough to each other. In addition, it is best to lubricate the undercarriage and check that it is in good working order by rotating it manually.

Dismantling the Rowenta hair dryer should begin by removing the cover from the handle using a flat screwdriver

The following overview presents the process of disassembling Rovent hair dryers (including Beauty and YFA 223J models) and includes:

• Removing the cover from the handle with a flat screwdriver.
• Removal from the switch panel.
• Removing the back cover from the case until the fan blades are found.
• Extraction from the front of the spiral and the motor.

If the microcircuit cracks, you need to clean it and solder it. Next comes the inspection of the capacitors and replacing them with new ones in case of swelling. If the resistor parts have darkened, their condition indicates that the elements are burnt out. Defective parts must also be replaced.