The repair of Saeco coffee machines was discussed, it was described that it would break. The speech concerned coffee machines that can grind grain, dispense, brew, pour in cups. The difference between the coffee maker in the modest possibilities, designs abound. More often we meet on the counter three: drip, espresso, capsular. Between them, quite large differences in cooking methods, the insides are similar. Each device has one 230 volt motor( for example, synchronous with a magnetized rotor), which drives the pump. More like a compressor, in some the piston goes back and forth. Creates high pressure( rozhkovy modifications).Consider how to repair the coffee maker with your own hands.
The internal structure of the
coffee makers. The coffee maker forms the basis of the water tank, the heating element, but then there are differences. The difference between the drip coffee maker and espresso is described by the working pressure. In the first case, boiling water just drips onto the filter containing the poured coffee, the drink seeps further down, drains, fills the cup. It is important to see the function of the drop-stop, so as not to constantly collect moisture. In the espresso under pressure, a jet of water with a temperature of 95 degrees is pushed through a tablet. To top it off a special press dries the squeeze. It turns out dry squeezed coffee pill. No filter need to be added. Coffee machines work on different principles, there are drop, espresso models.
Capsule coffee machines contain a brewing compartment with a needle, into which a plastic container with coffee powder is inserted. Brewing can be carried out under pressure and without. The first method differs from the second one in the construction of the boiler: water takes the required temperature, the compressor creates pressure. In the latter case, more often we observe the possibility of getting milk froth. Steady bubbles are formed due to a high temperature pair. The walls of the balls are cured by strong heat. One difference between brewing coffee and making a froth:
Coffee is brewed with water of 95 degrees Celsius, to get steam the heating elements work, reaching a threshold of 127 degrees. Modes are considered the best for traditional recipes.
Pay attention to the compressor: allows you to properly brew coffee, get the foam. The pressure created is impressive, reaching 15 - 20 bar, more than it is fed into the heating radiators system in the autumn, checking during technical events. It is able to brew quality coffee. In models of espresso( sometimes called the carob), a special horn, where coffee is applied. Then the design is screwed onto the body pipe, the handles are tightened with force. It turns out a dense tablet through which water is powerless to leak, losing the contour of a high-power compressor. It is able to brew excellent coffee, a little different from the true drink obtained by the Turks according to generally accepted traditional methods.
Describe in detail the device of the coffee maker, varieties of coffee makers, so that readers can imagine what is happening inside. Knowing the features of the operation of devices, it is easy to localize the breakdown. The main types of faults will visit the mind automatically, the internal structure will become apparent.
Drip coffee maker:
principle of operation We write the work of a drip coffee maker. Water is taken in capacity through a hose, pumped out by the pump. The flow heater provides a fixed power, the speed of the pump is consistent with the output temperature. In smart coffee makers there is a sensor that controls the parameters of the environment. Passing the tube, hot water reaches the upper compartment, equipped with a filter containing ground coffee. The dosage is carried out according to indications of a flowmeter, or the temporary relay of a pump limits duration of turning on of TENA.Adjustment is possible. The spring timer works by energizing the pump through a non-quenching relay, or the electronic board monitors the flow meter, stopping the flow of water at the right time.
In some cases, the temperature is not monitored at all. The portions are taken through a check valve. Then the heating element in a few seconds turns the liquid into steam, the jet rushes up the tube, pouring in the brewing compartment, flows into the cup. The technique does not allow to get a true coffee, attractive simplicity of implementation. A coffee maker knows how many micro doses a single cup can hold. The simplest manual counter controls the operation. The lack of water in the tube for the new fence is controlled by a bimetallic plate. In the simplest case, the heating element immediately works on a volume of water equal to a standard cup of coffee.
Drip coffee maker is different in shape, resembling an hourglass, is powerless to make cappuccino foam, latte. Self-repair of drip-type coffee makers is simple. Inside we will find:
- heating element;
- control circuit.
There is an electronic filling of the chips - there is a switching power supply that produces a constant voltage of the required rating( +5, +12 V).The efficiency increases. To measure the temperature used bimetallic plate, breaking extremely rarely. The check valve can be easily checked by blowing in one direction or the other. The engine operates, is controlled by a time relay( ordinary RC chain), less often we see a flow meter, a level sensor. The pump is called if the engine is collector, the action is repeated for the sections alternately.
Rozhkovaya( espresso) coffee maker: principle of operation
Repair rozhokovogo coffee maker is the most difficult. There is no pump - a compressor that pumps water under pressure into the boiler. The heater is outside the tank. Externally, it resembles an iron: TEN is rolled against the wall of a collapsible boiler. A bimetallic plate is used to regulate the temperature; the sensor tension is adjusted by a screw for at least two positions. For brewing coffee using a temperature of 95 degrees Celsius, steam will require 127 degrees. Accordingly, the contact of the heating element relay opens at the right moment. The boiler is durable, assembled in two halves, withstands a pressure of 20 atm without problems. The entrance is equipped with a check valve, so that the water does not go back during thermal expansion, heating.
The engine is made to issue a fixed portion of water. Carob coffee is called because the coffee is poured into a cup with a long handle. The design with the fit is worn on the body, the coffee is rammed. Under the pressure exerted by the pump, water fills the mug. Coffee makers are considered the best, experts say: carob models will allow you to take the maximum flavor and aroma from the grains.
Inside the rozhkovy coffee makers one engine, refers to the pump. Switching the path to the steam supply is conducted manually. The collector motor is rarely used, the pump is relatively small, the sense of making a garden disappears, there is a lot of noise. The pressure is pumped by a piston( like a refrigeration compressor), for which a large amount of effort is not required to develop. It is easier to save copper, use an asynchronous motor. Brushes take up a lot of space. Coffee grinders of rozhkovy type are equipped with power supply units of the engine, other elements.
Expensive engine models contain a compatible with inverter control. There are valve. Feature of rozhkovy models available boiler bypass valve. Pressure is dosed, ensuring the correct brewing process.
Capsule coffee makers:
principle of action Capsule coffee makers differ little from drip. A small container containing coffee powder is placed inside, and a piercing mechanism is clamped by hand. After use, the capsule is reset automatically, removed by the user of the device. Inside the movement of the flow of fluid manages the pump, instantaneous water heater raises the temperature of the water, reaching the target. Sometimes there are no sensors, just the pump acts according to the timer. The rate of water transmission is calculated in advance. It remains to substitute the cup. If the water is dosed incorrectly, look for the pump motor power source. The timing circuit is faulty, no matter how much the interval is set.
Do-it-yourself coffee maker repair doesn’t really depend on the model. Saeko, Gaggia, Nespresso, Rowenta, Spidem - different details. Form, location of parts, types of sensors. The principle of action remains the same everywhere. Repairing Jura coffee makers is like repairing Krups coffee makers.
Inspection begins along the cord on the power board, if one is available. The pulse source is equipped with a cascade of filters, a diode bridge, key transistors. Elements before and after the transformer are inspected for burnout, prozvanivayutsya. It is easier to immediately measure the output voltage of the circuit, then move on. Pump is easier to check separately. Before this, look at the voltage rating required for power supply to avoid incidents. If the pump breaks, the possibility of winding the stator coils is evaluated. There is a chance to successfully complete the operation, you will not have to buy a new part.