Principles of operation of geyser-type coffee makers

Geyser coffee makers are known to many since the times of the Soviet Union, while they were made from aluminum and very quickly lost their appearance. Such devices have received the maximum distribution in Italy, and the famous Italian Mocha is in essence the same geyzer coffee makers, only in a more interesting version.

The principle of operation of geyzernoy coffee makers

Geyser coffee makers can be put on the stove: gas or electric. But also on sale it is possible to find models with the built-in heating mechanism which work by the principle of an electric kettle. As a rule, such equipment is somewhat more expensive, but it is extremely convenient to use it if it is not possible to heat the coffee maker.

The device of household geyser coffee maker looks as follows: at the base of the device there is a water tank, in the wall of which a safety valve is embedded; a filter is put on the container, which is covered with a kind of strainer for ground coffee; in the upper part there are compartments for the finished drink. The principle of operation of the geyser coffee maker is based on the use of steam under pressure.

In the lower compartment of the case water is poured in the right quantity, while it is very important to ensure that the water level does not rise above the label located inside the coffee maker. Next, ground coffee is poured into the coffee compartment, after which the upper part is screwed to the bottom and the appliance is put on fire.

In the process of boiling, water turns into steam, squeezing out the remaining liquid through the tube into the upper compartment, passing it through the coffee beforehand.

Since geyser coffee maker is primarily used for making espresso, the principle of operation of such devices is reduced exclusively to the extruding function of steam. If the steam will also brew, the product temperature at the outlet will be very high. A special role in the apparatus is assigned to the emergency valve, through which the pressure supply stops, if the tube is blocked and water cannot pass through it. This often happens when finely ground, rammed coffee is used.

Recommendations for use

To brew delicious coffee and avoid premature failure of the device, you must follow a number of operating rules:

  • closely monitor the temperature of the drink and the heating of the plate;
  • as soon as you hear that the liquid begins to flow into the upper compartment - turn off the burner or remove the unit if you work with an electric stove.

Also, do not overly tamp coffee, even if you want to get the most saturated drink to taste. It is enough to press down a little with a spoon. Do not allow a working device to start sniffing, which usually occurs at the final stage of preparation.

If you still hear such sounds, immediately pour cold water on the lower part of the body. Such a sound means that too hot steam starts to take part in the operation of the device, which negatively affects the taste and quality of the finished drink.

It is necessary to remember about the rules of care. Rather thoroughly and regularly it is required to rinse all the components of the geyser coffee maker under running water. It is very important to remember that you can not use any chemical cleaners in the care of the device. In the opposite case, you can damage the top layer, because of which the taste of coffee will acquire the characteristic metallic notes. Do not be afraid to leave a protective patina on the inner walls of the device, it will benefit the taste and aroma of the finished drink.

Additional functions

Since the bulk of geyser coffee makers are used and designed to make delicious and high-quality coffee, they have a simple principle of operation. However, some manufacturers offer more advanced models that are supplied with a set of additional functions that greatly facilitate the process of preparing and operating the device.

These include:

  • sound notification at the end of the process of brewing coffee;
  • light indication, which confirms or disproves the operation of the device;
  • a timer that allows you to independently configure the automatic switch on time of the coffee maker;
  • automatic shutdown when the beverage is ready and the heating function, which allows you to maintain the temperature of the coffee.

However, such functions are most often present in modern geyser coffee makers, which are powered by electricity.

Advantages and disadvantages of geyser coffee makers

The main advantages of such devices include saturation, aroma of the finished drink and the absence of the need for constant monitoring of the operation of the device.

Other advantages include:

  1. Lack of coffee grounds, because the ground coffee does not fall into the top bowl.
  2. Acceptable cost. Even the original Italian assembly devices cost no more than $ 50.
  3. Compactness, thanks to which the device can be placed anywhere.
  4. Geysers can be used not only for making coffee, but also for brewing tea or herbal.

But there are also disadvantages:

  1. Limited volume After all, when using a geyser coffee maker, only a strictly designated number of cups can be made.
  2. The need to closely monitor the degree of grinding of coffee powder, because it should not be too fine. Otherwise, the filter will quickly become clogged.
  3. The structure of the device may cause minor difficulties in the care of the device.
  4. The inability to get the mouth-watering foam that many coffee lovers love so much.
  5. The metal part of the device remains hot for a long period, so care must be taken when operating the device.
  6. If you have an induction cooker installed at home, then even the most popular aluminum device will not work on it.

Top models of geyser coffee makers

Vinzer 893807

The model of the Swiss brand, which is made of the most durable aluminum. It has compact dimensions: 24 × 15 × 15 cm. The weight is only 400 g. The advantages include:

  • the possibility of preparing an espresso immediately for 11 people, if the portion is 40 mg;
  • the presence of a bakelite handle is a material that is resistant to heat, so when preparing coffee, the probability of getting burned is minimal, even if you hold the handle with your bare hand.

This model is suitable for almost all heat sources: for both gas burners and electric cookers. However, it must be remembered that the manufacturer advises coffee makers to wash by hand without using any abrasive materials. The disadvantages of the model include the fact that it is incompatible with induction hobs.

Maestro MR-1667-3

This model of geyser type is made of durable and cast aluminum. The coffee maker allows you to make a drink in just 10 minutes: about 5 minutes the heating lasts and about the same evaporation. Three key benefits:

  • the presence of bakelite handles resistant to high temperatures;
  • the possibility of preparing 300 ml of drink, which allows you to brew coffee for 7 people at once;
  • ease of care for the product, since it is enough just to clean the tank from the remnants of coffee grounds and wash the product under warm water.

This model can be used both on an electric stove, and on usual gas. However, induction surfaces are an exception, which can be attributed to minuses.

Bohmann BH-9506

Geyserny coffee maker from stainless steel - material, strong and resistant to mechanical damages. Like all coffee makers of this type, the model is equipped with three containers, which are separated by filter elements. At the bottom is a water tank, in the middle - for ground coffee, the upper compartment is designed for the finished drink.

To pamper yourself with a delicious drink, you just need to fill the tanks and put the coffee maker on the stove. Two benefits of a Bohmann coffee machine:

  • a bakelite handle, thanks to which you do not need to use tacks or towels to take hold of it with your bare hands;
  • possibility of making 7-8 cups of drink at a time.

Bialetti moka express

One of the most famous options. Produced in Italy. Robust construction consists of parts made of cast aluminum, which are securely fastened together with a threaded mechanism. The advantages include the prevention of accidental burns, since the handle is made of heat resistant nylon. A button for opening the lid is made of the same material.

The coffee maker is as easy to maintain as possible, for cleaning it can be easily disassembled, the valve must be removed for this, and all parts need to be rinsed in running water. This coffee maker can brew coffee for 11 people in just a few minutes. However, in order not to “reward” the drink with a metallic aftertaste, you cannot use hard iron grids to wash the coffee maker. The disadvantages include the inability to use an induction cooker.

Vinzer 89393

The model is made of high-quality aluminum, the weight of the structures is only 400 g. The advantages include the possibility of preparing a drink in just 2-3 minutes. And at a time geyser coffee maker can make coffee for 10-11 people. Products are very easy to maintain: you need to wait a few minutes until the body cools down, after which it is disassembled, shake out the spent coffee and rinse under running water. The risk of getting a burn is minimal, because the coffeepot handles are made of bakelite. This coffee maker is also compatible with any cooking surfaces, except induction, which can be called a minus.

Maestro rainbow MR-1667-9

The body is made of aluminum alloy, and all parts of the structure are fastened together with the most stable threaded mechanism. The product is equipped with a filter, percolator, a valve for the release of steam from copper. The handle on the bakelite case has a low level of thermal conductivity, which makes this coffee maker comfortable and safe to use.

With this model, you can prepare more than 20 small espresso cups in 1 time, because its volume is 900 ml. This coffee machine is easy to disassemble and wash, in addition, it can be washed in a dishwasher. The only negative is that it is incompatible with induction hobs.

Peterhof PH 125284

The body is made of stainless steel, which makes the design of the most durable. The advantages include the fact that this model, even with active use, will retain its shape. It can be removed from the stove with bare hands, since the handle is made of bakelite. At the same time in this coffee machine you can make coffee for 5 people. This model can be used for glass-ceramic stoves, gas stoves and halogen burners. But, unfortunately, can not be used on induction models. You can wash the coffee maker only with your hands, it is not suitable for washing in the dishwasher.

Tips for making delicious coffee

To get a flavored espresso, you must use medium or coarse ground coffee. If you have only finely ground coffee, it can also be used, but in this case it should be remembered that the finished drink will be very strong and bitter. You should not strongly tamp coffee in the filter, in this case, the water may not pass through it. Tamper should be average.

Use filtered water. If you use running water from the tap, then the finished coffee will not taste good, and scum will begin to form on the walls of the kettle over time. Crush coffee beans before cooking, because in this case, the finished drink will get the most fragrant. Use additional ingredients that will help make coffee even more delicious.

For example, add milk, cream, grated chocolate, toppings or even spices to hot coffee. Especially tasty to drink espresso with the addition of cloves, cinnamon or black pepper. This drink will amaze you with its warming effect.

The following tips will help you not only get the most delicious coffee, but also extend the life of the geyser coffee maker:

  1. Do not wash the coffee maker using household chemicals.
  2. Oil remaining on the walls protects the device from the harmful effects of water and the appearance of an unpleasant metallic taste. Therefore, after application, simply rinse the coffee maker in water without using a washcloth and detergent.
  3. Do not interfere with the preparation of the drink: do not open the upper part when operating the coffee maker, even if you hear a hiss. This can cause severe burns, because when opened, the device will release a large amount of steam.
  4. Do not overfill. You do not need to pour water above the safety valve, as this can lead to the fact that the drink just flows out on the stove.

Watch the video: How does a Water Heater Work. How Stuff Works. How Devices Work in 3D. Science For Kids (May 2024).