10 Tell-Tale Warning Signs You Should Know To Know Before You Buy Machine Espresso > 자유게시판

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

How Does Machine Espresso Work?

The machine espresso is made using precise pressure and filtering technology that is amazing to make the coffee you love. How exactly does it work?

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

The Head of the Group

As the name suggests the group head is where you place your portafilter while brewing espresso. It distributes water into the portafilter, and regulates the pressure of the extraction. There are several different types of group heads, each with their distinct advantages and disadvantages. Some are specifically designed for temperature stability while others are designed to handle pre-infusion. Others are built to control the lever. There are some that include a mix of features, like the E61 one, which is the most popular choice among baristas because of its ability to offer multiple perks in a single package.

As you can see in the photo above The group head features many notches in which you can place your portafilter and twist it with your hands to secure it. There is also a gasket of rubber which is located inside the notches and helps create a seal when you insert your portafilter into the machine. The notches on the head permit an exact position of the portafilter which is essential to ensure an efficient extraction.

The group head not only lets you to put in your portafilter easily however it also keeps the temperature at a constant level. It does this by cycling hot water through the brew container and Espresso Machines home around the portafilter, ensuring that it's always at the right temperature for extraction. This is important, as even a few degrees can mean the difference between good and great espresso.

The Pump

In contrast to piston machines that are manually operated, which rely on a lever to pressurize water, Rotary home espresso machine machines rely on motorized pumps to supply the nine atmospheric bars of pressure needed for espresso extraction. The pressure is created by pumping water through a heat exchanger and then through the ground coffee.

Pumps tend to be cheaper than piston-driven machines, and tend to last longer. However, both types of machines may get damaged through overuse and lack of cleaning. Pumps are also more complicated mechanically, and can add to the price of even the simplest models.

Some espresso machines remove the pump completely and make use of steam pressure to make espresso. This can cause over-extraction because the boiler that produces steam also heats the water to boil. In addition these machines are often required to restore their pressure between cups, which takes time and energy.

Many espresso machines make use of the rotary or vibration pump. A vibration model makes use of a rotating disk to generate pressure, whereas a circular model pushes hot liquid through the ground at a rapid speed. Both types of machines can make excellent espresso, however the rotary models are quieter and more durable than vibration pumps.

The Boiler

The boiler is the component that heats water to an ideal temperature to extract. The steam created will eventually reach the portafilter, which is the container that holds the espresso coffee grounds. The steam is then channeled into the cup. During this process, steam causes pressure to push through the coffee grounds. This results in a whipped-up the top of the espresso. This is one of the main characteristics of a great espresso.

There are three kinds of espresso machines, each with a different type of pump and the temperature of the brew. There are also different ways in which the brew can be controlled as well as the dimensions of the cup the maker can create.

The earliest espresso machines were steam types. They utilized one boiler to make steam and brew, however the pressure they were able to generate was low - only two bars of atmospheric pressure maximum. The coffee tasted bitter and burnt. The modern espresso machine was created by the Milanese makers Luigi Bezzerra & Desiderio Pavoni.

The most commonly used espresso machine is a semiautomatic model with an electric pump. This is what people envision when they think of an espresso machine. Semi-automatic machines require you to grind and tamp the beans on your own however the pump controls the flow of water and pressure. This is a great compromise between the human touch and the mechanised quality.

The Filter

Typically, espresso machines use filters that separate the grounds of coffee when they pass through the hot water. The filter is also a vital part of the machine's temperature control, as it helps prevent overheating.

Filters also aid in flavor, as it permits an extended flowering time. This lets the beans let their nuances out, and allows for a better extraction.

However, it is important to keep in mind that even a high-quality filter can result in a poor cup of coffee for espresso machine as the quality of the beans and extraction is still vital.

This is where the magic happens, it's the thing that makes an espresso really taste good. The grouphead (also known as the brewhead) is where you put the portafilter, the thingy used to place the grounds of coffee into while making Espresso Machines Home.

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 with high pressure. They are less expensive and easier to maintain than pumps-driven models. They are however limited for creating the ideal brewing conditions 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 through grounds and are much more portable than steam-driven electric machines.