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

How Does Machine Espresso Work?

Machine espresso uses precision pressure and espresso machine with grinder [www-coffeee-uk51020.blogpostie.Com] mind-blowing filter technology to make the coffee we love. How does it work exactly?

To make an 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 main difference.

The Head of the Group

The group head is the portafilter is inserted when you are making espresso. It distributes water into the portafilter, and regulates the pressure of the extraction. There are a variety of group heads each with distinct advantages and disadvantages. Some are focused on temperature stability, some on pre-infusion features, and others are designed to control the lever. Some are a combination, like the E61. This is a preferred choice for baristas since it provides multiple benefits in one package.

As you can see in the picture above the group head is equipped with several notches. It is possible to place your portafilter inside these notches, and then twist the head to lock it. There is also a gasket made from rubber that is a part of the notches to help create an airtight seal after inserting your portafilter into the machine. The notches on the head allow for a precise position of the portafilter which is necessary for an efficient extraction.

Apart from allowing you easily place your portafilter in, the group head is responsible for maintaining an even temperature. This is accomplished by cycling hot water around the portafilter and through the brew-basket, making sure that the temperature is always at the right level for extraction. It is crucial to keep in mind that even a tiny difference can make the difference between a good and a great espresso.

The Pump

Contrary to manual piston machines which use a lever to pressurize water, rotary espresso machines rely on motorized pumps that provide the nine atmospheric bars of pressure required for best espresso maker extraction. This pressure builds up by removing tap water from a reservoir and pumping it through a heat exchanger prior to it is shot through the ground coffee in the group head.

Pumps are typically more affordable and last longer than piston-driven machines. However, both types of machines can deteriorate due to overuse and inadequate cleaning. They also create mechanical complexity that can lead to an expensive price for even the simplest models.

Some espresso machines employ steam pressure instead of a pump for brewing espresso. The drawback of this is that the same boiler that produces steam also raises the temperature of the water to the point of boiling which can cause excessive extraction. Additionally, these machines frequently have to rebuild their pressure between cups, which requires time and energy.

A majority of espresso machines utilize either a vibration or rotary pump. A vibration model utilizes a rotating disk to generate pressure, while the rotating model pushes hot water through the ground at a rapid speed. Both models can make excellent espresso, however Rotary machines are quieter and more durable than vibration pumps.

The Boiler

The boiler is the element that heats the water to the ideal temperature for extraction. The steam that is produced gets to the portafilter which contains the espresso coffee grounds. It is then pumped into the cup. During this process the steam is able to create enough pressure to push the coffee grounds through. This results in a layer of crema on top. This is one of the main characteristics of a great espresso.

There are three kinds of espresso makers. They differ in the type of pump they employ and how hot the brew is. There are various ways that the brew can be controlled and the size of the cup that the machine is capable of making.

The first espresso machines were steam-types. They had one boiler to create both steam and brew, but the pressure they could generate was low - only two bars of atmospheric pressure at most. The coffee tasted bitter and burnt. This is why Milanese makers Luigi Bezzerra and Desiderio Pavoni invented the modern best small espresso machine machine.

The most commonly used espresso maker is a semi-automatic one that has an electric pump. When people think of espresso machines, they think of these machines. 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 an excellent compromise between human touch and the mechanized consistency.

The Filter

Espresso machines typically have filters that separate the grounds of the coffee from the hot water. The filter is also an essential element of the machine's temperature control, since it helps to prevent overheating.

It also enhances flavor, as a filter can allow for a longer bloom phase. This helps the beans release their flavors and provides the chance for better extraction.

However it is crucial to remember that even a high-quality filter can make a terrible cup of coffee, as the quality of the beans and extraction is still vital.

It's in this area that the magic takes place. This is what makes small espresso machine taste so good. The grouphead, often called the brewhead, is where the portafilter (the container you place the coffee ground into) sits when you're making espresso.

Steam-driven espresso machines make use of hot water that is heated inside an airtight container to create steam. The steam then moves hot water through the coffee grounds under high pressure. These kinds of machines tend to be less expensive and easier to maintain than pump-driven models. However, they are not as efficient in their ability to produce the perfect conditions for brewing, because they operate at 1-1.5 bars of pressure. The perfect 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 ground, and are more mobile than steam-driven electric espresso machines.