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

How Does Machine Espresso Work?

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

To make an espresso, hot water is forced under high pressure through finely ground coffee machines espresso. The process is similar to that of making drip coffee. However the pressure is the major difference.

The Group Head

The group head is the portafilter is inserted when you are making commercial espresso machine. It is responsible for dispersing water into the portafilter before controlling the pressure of the resulting extraction. There are several different types of group heads each with its particular advantages and drawbacks. Some focus on temperature stability, while others on pre-infusion capabilities, while others are designed to control the lever. Some are a combination, like the E61. This is a popular choice among baristas because it offers multiple advantages in a single package.

As you can see in the above photo The group head features several notches where you put your portafilter, then twist it manually to secure it. There is also a rubber gasket that is a part of the notches and helps create the seal when you insert your portafilter into the machine. The notches on the head allow for an exact location of the portafilter which is vital for an efficient extraction.

In addition to allowing you to easily place your portafilter in, the group head is also responsible for maintaining a consistent temperature. This is accomplished by cycling hot water around the portafilter, and through the brew-basket, making sure that the temperature is at the right level for extraction. This is vital, because just a few degrees could mean the difference between good and great espresso.

The Pump

The motorized pumps that are used in rotary espresso machines provide the nine atmospheric bar pressure that is required for espresso extraction. This is different from manual piston machines which use a lever. The pressure is created by pumping water through a heat-exchanger and then through the ground coffee.

Pumps are typically cheaper and last longer than piston-driven machines. However, both types of machines may degrade because of frequent use and poor cleaning. They also create mechanical complexity and can lead to a high price tag on even the most basic models.

Certain espresso machines utilize steam pressure instead of a pump in order to brew espresso. This can cause over-extraction because the boiler that makes steam also heats the water to boil. Additionally the machines often have to rebuild their pressure between cups, which requires time and energy.

Many espresso coffee machine uk machines make use of either a rotary or vibration pump, which has a vibration model using a vibrating disc that generates the pressure and a rotary model pushing hot water through the grounds at high speed. Both types of machines are capable of producing excellent espresso, however Rotary machines are quieter and more durable than vibration pumps.

The Boiler

The boiler is the component that heats water to the ideal temperature for extraction. The steam produced is then directed to the portafilter, which is a container for espresso grounds. It is then poured into the cup. During this process, steam creates pressure and pushes through the grounds of the coffee. This produces a layer of crema on top. This is a hallmark of a good espresso.

There are three types of espresso makers, which differ in the type of pump they use and how hot the espresso is. There are many 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. They had one boiler to create both brew and steam, however, the pressure they could produce was very low - just two bars of atmospheric pressure maximum. The coffee tasted bitter and burned. This is the reason why Milanese manufacturers Luigi Bezzerra and Desiderio Pavoni created the modern espresso machine.

The most well-known espresso maker is a semi-automatic device that has an electric pump. When people think of espresso machines, they picture these machines. If you have a semi-automatic machine you grind the beans and then tamp them by hand. The pump is able to regulate the flow of water and pressure. This is a great compromise between the human touch and mechanized accuracy.

The Filter

Typically, espresso machines have a filter to separate out the grounds of the coffee as they go through the hot water. The filter is also a vital component of the machine's temperature control, since it helps to prevent overheating.

A filter also helps with flavor since it allows for the beans to flower for a longer period of time. This helps the beans to let their nuances out and provides an opportunity for better extraction.

It is important to remember that even the best filter can make a bad cup of coffee. The quality of the beans, and the extraction process, are still very important.

It's in this area that the magic happens. This is what makes espresso taste so delicious. The grouphead (also called the brewhead) is where you put the portafilter, the thingy that you use to put the coffee grounds into, when making espresso.

In a steam-driven Espresso Coffee Machine For Home machine, hot water is heated in an airtight container to produce steam, which then pushes the hot water through the grounds with high pressure. They are less expensive and easier for the owner 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 ideal shot requires 9-10 bars.

In recent years, compressed air pump-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.