13 Things About Machine Espresso You May Not Have Known > 자유게시판

How Does Machine espresso machine small Work?

Machine espresso employs precise pressure and incredible filter technology to produce the coffee we love. How does it work exactly?

To make espresso, hot water is pushed under pressure through finely ground coffee. The process is similar to making drip coffee, but the major difference is in the pressure.

The Group Head

The name implies, the group head is where you place your portafilter while brewing espresso. It distributes water into the portafilter, and then regulates the pressure of extraction. There are many different types of group heads, each with its own advantages and drawbacks. Some are focused on temperature stability, some on pre-infusion capabilities, while others are designed to control the lever. Some have a combination, like the E61. This is a favorite among baristas due to the fact that it has multiple benefits in a single package.

As you can see in the photo above The group head features many notches in which you can put your portafilter, then twist it manually to secure it. There is also a rubber gasket in the notches to help create an airtight seal when you insert your portafilter into the machine. The notches on the head allow for a precise positioning of the portafilter which is crucial to ensure an even extraction.

The group head does not just allow you to place your portafilter easily, but it also maintains the same temperature. This is accomplished by cycling hot water around the portafilter and through the brew basin, ensuring that the temperature is always at the right level to extract the coffee. It is important to realize that even a few degree variation can mean the difference between a great and a excellent espresso.

The Pump

Contrary to manual piston machines which rely on a lever that pressurize water, rotating espresso coffee makers machines rely upon motorized pumps to provide the nine atmospheric bars of pressure needed for espresso extraction. This pressure is generated by pumping water through a heat exchanger and then through the ground coffee.

Pumps tend to be cheaper than piston-driven machines, and they tend to last longer. However, both types of machines may get damaged through overuse and lack of cleaning. Pumps are also more complex mechanically, which could increase the cost of even most basic models.

Some espresso machines employ steam pressure instead of a pump to make espresso. The drawback is that the boiler that produces steam also increases the temperature of the water until it reaches boiling which can cause over-extraction. In addition these machines are often required to rebuild their pressure between cups, which takes time and energy.

Many espresso machine Uk machines employ a vibration or rotary pump, which is a vibration model using a vibrating disc that generates the pressure, and rotating models that push hot water through the grounds at high speed. Both machines produce great espresso but rotary machines are more quiet, durable and less likely to break down.

The Boiler

The boiler is what is used to heat the water to the right temperature for extraction. The resulting steam is then transferred to the portafilter, which contains ground espresso beans and is then funneled down into the cup. During this process the steam is able to create enough pressure to push the grounds of coffee through. This creates a crema on top of the espresso. This is a sign of a good espresso.

There are three kinds of espresso makers. They differ in the type of pump they employ and the degree of heat that the coffee is. There are a variety of ways that the brew can be controlled as well as the dimensions of the cup the machine can make.

The first espresso machines were steam-type. They used only one boiler to make steam and brew, but the pressure they could produce was not very high - two bars of atmospheric pressure, at most. The coffee tasted bitter and burned. This is why Milanese makers Luigi Bezzerra and Desiderio Pavoni created the modern espresso machine.

The most common espresso machine is a semiautomatic that has an electric pump. When people think of espresso machines, they envision these machines. With a semi-automatic machine you need to grind the beans and then tamp them by hand, but the pump regulates the flow of water and pressure. This is an excellent compromise between human touch and mechanized consistency.

The Filter

Typically, espresso machines use filters that separate the grounds of coffee as they move through the hot water. The filter is also a crucial element of the temperature control system, as it keeps the machine from overheating.

Filters also aid in flavor as it allows for an extended flowering time. This allows the beans to release their nuances, and allows for better extraction.

However it is crucial to keep in mind that even a good filter can produce a bad cup of coffee, since the quality of the beans and extraction is still essential.

This is where the magic happens, and it's what makes an espresso machine small really taste great. The grouphead (also known as the brewhead) is where you place the portafilter, which is the thingy which you put the coffee grounds in, when making espresso.

In an commercial espresso machine machine that is driven by steam, hot water is heated in an airtight container to produce steam, which then pushes the hot water through the grounds under high pressure. These machines are cheaper and easier to maintain than pumps-driven models. They are however limited in their ability for creating the ideal conditions for brewing as they only operate with 1-1.5 bar of pressure. The ideal shot requires 9-10 bars.

In recent years, compressed air pump-driven espresso machines have been gaining popularity. They utilize an air compressor to force hot water into the grounds and are more portable than electric steam-driven machines.