Working principle of Italian coffee machine

Usually there is a boiler to generate hot water, which is pressurized to about 9 atmospheres, and then flows through the powdered coffee beans in a metal filter to brew coffee. This kind of coffee brewed under pressure with hot water is thicker than usual and contains emulsified oil, which is usually called espresso or espresso.

There are many kinds of Italian coffee machines. Generally speaking, the most common is a single boiler, then two boilers, and several boilers. Of course, the price has also become more expensive. In addition to the general electric control switch, there are also drawable italian coffee machine with different types.

Extended data:

Frequently asked questions:

1, coffee is too weak:

This coffee machine is an Italian professional steam coffee machine? The coffee machine is reasonable in price and belongs to Italian coffee utensils. The scale above is set according to the concentration of Italian coffee powder, which is very strong. When cooking other low-concentration coffee powder, you can get rich taste by adjusting the ratio of coffee powder to water. For example, after gently filling coffee powder, soak the coffee to the position of scale 2.

2, the coffee temperature is too low:

After turning on the power supply, wait until the water from the outlet is hot before putting the coffee powder, or open the lid to heat it, and then cover it when the water inside is about to boil, so that the taste of coffee will be very hot.

3. Soon after turning on the power, the water came out:

Is this normal? Because the water boiler of the coffee machine is very sealed, the water and gas in it will expand after heating, so the water will be squeezed out, and then the coffee will be brewed after the water is boiled, or the cover of the water inlet will be opened for heating, which can avoid this phenomenon.

Baidu encyclopedia-Italian coffee machine