GOUTERGALLERY

• 목록
• 답변
• 글쓰기
• 게시판 리스트 옵션
  • 수정
  • 삭제

How Does Machine Espresso Work?

The machine espresso uses precise pressure and filter technology that is mind-blowing to make the coffee you love. What exactly is it?

To make espresso hot water is pushed under pressure through finely ground coffee. The process is similar to that of making drip coffee. However, the pressure is the primary difference.

The Group Head

The group head is the portafilter that you insert when brewing espresso. It disperses water into the portafilter, and then regulates the pressure of extraction. There are a variety of group heads each with their own advantages and drawbacks. Some are designed for the stability of temperature while some are built to handle pre-infusion. Some are designed to control the lever. There are some that include a mix of features, such as the E61, which is the most popular choice among baristas for its ability to provide multiple benefits in a single package.

As you can see in the above photo the group head comes with numerous notches that you can place your portafilter and then twist it by hand to secure it. A rubber gasket is located inside the notches to help create a seal when you insert your portafilter. The notches on the head permit a precise positioning of the portafilter which is essential for an efficient extraction.

The group head not only allows the portafilter to be inserted easily, but it also maintains the temperature at a constant level. It does this by circulating hot water through the brew container and around the portafilter, ensuring that it's always at the right temperature to extract. It is important to realize that even a tiny difference can make the difference between a decent and a great espresso.

The Pump

Motorized pumps in rotary espresso machines supply the nine atmospheric bar pressure required to extract espresso. This differs from manual piston machines that rely on levers. This pressure is built up by pumping water through a heat exchanger and then through the ground coffee.

Pumps tend to be more affordable and last longer than piston-driven machines. However, both kinds of machines may degrade due to excessive use and poor cleaning. Pumps are also more complicated mechanically, which could increase the price of even the simplest models.

Certain espresso machines can eliminate the pump completely and employ steam pressure to create espresso. The disadvantage of this is that the boiler that produces steam also increases the temperature of the water until it reaches boiling which can cause excessive extraction. Additionally these machines are often required to restore their pressure between cups, which takes time and energy.

Many espresso machines use an rotary or a vibration pump. A vibration model employs an oscillating disk to create pressure, while the rotating model pushes hot water through the ground at high speed. Both machines can make excellent best budget espresso machine, however rotary machines are more stable, quieter and less likely to break.

The Boiler

The boiler is the component which heats the water to the ideal temperature for extraction. The resultant steam then reaches the portafilter containing the ground espresso coffee, and is then pumped down into the cup. During this process, steam creates pressure that pushes through the coffee grounds. This results in a crema on top of the espresso. This is the hallmark of a great espresso.

There are three distinct types of espresso machines, each with distinct pumps and brew temperature. There are various ways to control the strength of the brew and the size of cup that can be produced by the machine.

The first espresso machines were steam-types. The first buy espresso makers machines were steam types. This resulted in the coffee tasting bitter and burnt. The modern espresso machine was developed by the Milanese producers Luigi Bezzerra & Desiderio Pavoni.

The most well-known espresso machine is a semiautomatic that has an electric pump. These are the images people have when they think of an espresso machine. Semi-automatic machines require you to grind and tamp the beans on your own, but the pump regulates the flow of water and pressure. This is a fantastic compromise between human control and mechanised reliability.

The Filter

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

A filter can also help with flavor as it allows for a longer flowering period. This lets the beans let their nuances out, and allows for better extraction.

It is important to keep in mind that even the finest filter can produce a bad cup of coffee. The quality of the beans, as well as the extraction, are still crucial.

This is where the magic happens, it's the thing that makes an espresso really taste good. The grouphead, often called the brew head, is the place where the portafilter (the thingy you put the coffee grounds into) is placed when you're making Travel Espresso Maker.

In a steam-driven espresso machine, hot water is heated in an airtight tank to produce steam, which then pushes the hot water through the grounds at a high end espresso machine pressure. These types of machines are usually cheaper and easier to maintain than pumps-driven models. They are however limited in their ability to create the perfect conditions for brewing since they only operate with 1-1.5 bar of pressure. The perfect shot requires 9-10 bars.

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