How different types of coffee machines work

Many coffee lovers have appreciated the possibility of making a favorite drink in coffee machines of various types. It is really fast, convenient and simple. Many users are interested in, what is the principle of operation of the coffee machine and how it works? But is it really interesting how a coffee machine can make a cup of coffee in just 1-2 minutes?

General principle of work

To make coffee by hand, first you need to fry and grind the grain. When using the coffee machine, all these steps can be skipped. To understand how the coffee machine is arranged, let's consider step by step how it makes coffee:

1. For the preparation of a coffee drink you need hot water, but in no case boiling.The machine itself heats the water to the optimum temperature of 80-90 ⁰WITH.
2. Coffee for drink is used ground or in special sealed capsules (already roasted and ground). Due to its tightness, the capsules retain its taste and aroma for a long time.
3. Inside the car, these two ingredients are combined and transformed at the exit into an invigorating aromatic drink.

In the case when you need to make a cappuccino or latte, you will need to add another ingredient, milk, to decorate the drink with a “cap” of thick foam.

Device

The general schemes of all coffee devices are identical and consist approximately of such a set of components:

• A heating element.
• Tank with lid.
• Safety valve to control the pressure in the device.
• The filter that receives steam.
• Flask for coffee.

Depending on the manufacturer, this kit may vary. For example, DeLonghi manufactures coffee machines that have two injection pumps, with which you can simultaneously prepare and cappuccino, and espresso. In addition, if we consider the electrical circuit of the action of DeLonghi coffee machines, it can be noted that heating elements are not always present in them.Sometimes (in simpler models), to make coffee, steam is used, which is formed from boiling water.

Types of coffee machines and the principle of their action

For making coffee drinks at home, usually choose the following types of coffee makers:

• Capsule.
• Drip.
• Geyser.
• Rozhkovye.
• Combined.

Capsular coffee machine

The device of the coffee machine, the principle of its operation, the process of brewing coffee is quite complicated, but, as a rule, same for all models manufacturers. Consider how the most expensive works - capsule coffee machine:

1. Water is poured into the tank at the back of the device.
2. A pump located at the bottom of the unit sucks in water and feeds it into the machine.
3. Here it is heated to the optimum temperature by means of the heating element.
4. Hot water under high pressure flows through a capsule with ground coffee, after which two holes remain after piercing: from the bottom and from the top.
5. As a result of this action, an aromatic drink is brewed, which, leaving the coffee grounds on filtered paper, flows into the cup.

Drip coffee maker

This is a kind of inexpensive coffee machines with a fairly simple principle of operation.The scheme of action consists in the passage of hot water at a slow pace (drop by drop) through the filter through ground coffee, where it, saturated with taste and aroma, flows into a special flask. In such devices coffee is brewed. without pressure steam or boiling water. Choosing such a device for home, you should pay attention to the following points:

1. Power - to get weak coffee, you need to choose a device with more power, and for a strong coffee drink you should buy a device with a small capacity.
2. View flaski.e. the material from which it is made (glass or plastic). Glass does not absorb odors, and plastic is more durable.
3. Bulb sizewhich depend on the required amount of brewed coffee.
4. Filters, which are of three types (disposable; gold - for long use; nylon filters that can be used up to 60 times brewing).

Geyser coffee maker

These devices are both electric and non-electric, which can be placed directly on the hob or simply on an open fire. Unlike the previous coffee machine, here the principle of operation is the opposite. Water in these devices served from the bottom up, identical to the geyser and pours coffee. After that, it is saturated with coffee, poured into a special flask.

The volume of geyser coffee makers is small. They look like porcelain coffee pots. What is great, the coffee from the device “does not run away” as from a cezve, but you need to look after it, of course.

The geyser coffee maker consists of two tanksinterconnected like an hourglass. In the central area, in a narrow canal there is a compartment for coffee. When the water in the lower compartment boils, it rises, and along the narrow passage sneaks up, brewing coffee along the way. In the upper tank is almost ready to drink.

Rozhkovaya coffee maker

Let's look at how the carob-type coffee machine works. This coffee machine, sometimes called an espresso machine, prepares coffee drinks. under the influence of steam. Water is in a special vessel where, boiling, forms steam. This steam, passing under pressure of about 10-15 bar, comes out through pressed coffee in the horn.

Rozhkovy coffee makers happen two types, depending on pressure in them:

• Up to 4 bars, in which coffee is brewed slowly and it turns out strong and saturated.
• Up to 15 bars, in which coffee is prepared quickly and turns out to be soft and gentle.

Tips for choosing:

1. It is better to choose devices with a metal horn for better warming of coffee and getting a more saturated drink.
2. It is very good if there is a double nozzle in the coffee maker (two-nut models) that allows you to simultaneously prepare two cups of coffee.

Espresso harvesters

Such coffee makers are also called cereals. They have a small cost, but there is a possibility to choose the type of coffee - ground or in beans.

The device is rather of the rozhkovy type and is supplied in most cases with a cappuccinator.

In the configuration of the device there is also a coffee grinder. The grind of the latter can be ceramic or metal. The first are more practical and noiseless, but quickly break down, the metal millstones are more durable.

Combined coffee machines

These devices include to automatic type and have a built-in coffee grinder. In such a coffee machine, you can grind grains and make several cups of coffee at once. And the main advantage of the combined coffee machine is the possibility of using fresh ground coffee.In devices of this type there is a function of automatic cleaning and filtering of water, which saves the device from lime deposits and the formation of scale.

Start the process of making a drink by pressing just one button. The machine works as follows:

• Grinding grains.
• Pressing.
• Filling the required amount of coffee in a special container.
• Passing hot water through pressed coffee to get a drink.

Combined coffee machines are not cheap, but the process of preparing drinks in them is fully automated.

Conclusion

Of all the types of coffee makers, automatic type models are the most expensive and their choice for home use is not entirely successful. Home use is better to use capsule coffee machines. They take little time to make coffee, but you need to stock up in advance with capsules, which, by the way, are not cheap. At home, devices of the horn type proved in the best way. They are not so expensive and easy to use.