Ten Things You Learned In Kindergarden To Help You Get Started With Machine Espresso > 자유게시판

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

How Does Machine Espresso Work?

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

Espresso is made by forcing hot water under high pressure through finely-ground coffee. The process is similar to making drip coffee, however the main difference lies in the pressure.

The Head of the Group

The group head is the portafilter that you place in the espresso maker when making it. It disperses water in the portafilter and regulates the pressure of extraction. There are many different types of group heads each with distinct advantages and disadvantages. Some are focused on temperature stability, while others on pre-infusion options, and others are designed to control the lever. Some are a combination, such as the E61. This is a very popular choice for baristas since it provides multiple benefits in one package.

As you can see in the photo above the group head comes with several notches where you place your portafilter before twisting it with your hands to secure it. There is also a gasket made from rubber that resides inside the notches and helps to create an airtight seal when you insert your portafilter into the machine. The notches permit the precise placement of the portafilter. This is crucial to ensure an even extraction.

In addition to allowing you easily place your portafilter in, the group head is also responsible for maintaining an even temperature. This is done by cycling hot water around the portafilter and through the brew basin, ensuring that the temperature is at the right level to extract the coffee. It is important to realize that even a slight differences can make the distinction between a good and great espresso.

The Pump

In contrast to manual piston machines which rely on a lever that pressurize water, rotary espresso machines rely on motorized pumps to provide the nine atmospheric bars of pressure that are required to extract espresso. The pressure is created by pumping water through a heat-exchanger and then through the ground coffee.

Pumps tend to be less expensive and last for longer than piston-driven machines. However, both types of machines are susceptible to degrading due to overuse and inadequate cleaning. They also add mechanical complexity that can lead to a high price tag on even the most basic models.

Some espresso machines, please click the following page, eliminate the pump completely and instead use steam pressure to brew espresso. This can result in over-extraction because the boiler that produces steam also causes the water to boil. The machines must also continuously rebuild their pressure between cups. This takes energy and time.

Many best home espresso machine machines utilize the 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 models are capable of producing excellent espresso capsule machine, however the rotary models are quieter and more durable than vibration pumps.

The Boiler

The boiler heats the water to the ideal temperature for extraction. The resulting steam reaches the portafilter containing ground espresso beans and is then pumped into the cup. During this process, steam causes pressure to push through the coffee grounds. This results in a layer crema on top. This is the hallmark of a great espresso.

There are three distinct types of espresso machines, each with different types of pumps and the temperature of the brew. There are different ways that the brew can be controlled, as well as the size of the cup that the maker can create.

The first espresso machines were steam-based. The earliest espresso machines were steam types. The coffee tasted bitter and burnt. This is the reason Milanese makers Luigi Bezzerra and Desiderio Pavoni developed the modern espresso machine.

The most popular espresso maker is a semiautomatic machine that has an electric pump. When people think of espresso machines, they envision these machines. Semi-automatic machines require you to grind and espresso machines tamp the beans yourself however the pump controls the flow of water and pressure. This is a perfect compromise between human control and mechanized accuracy.

The Filter

Typically, espresso machines employ 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 prevents overheating.

A filter also improves flavor, as it permits the beans to flower for a longer period of time. This lets the beans release their flavors, and also allows for better extraction.

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

This is where the magic happens, it's the thing that makes an espresso really taste good. The grouphead (also called the brewhead) is where you put the portafilter, the thingy that you put the coffee grounds into, when making espresso.

Steam-driven espresso machines make use of hot water heated in an airtight vessel to create steam. The steam then pushes hot water through grounds of coffee under high pressure. These kinds of machines are generally less expensive and simpler to maintain than pumps-driven models. However, they are limited in their ability to produce the ideal brewing conditions, since they operate at 1-1.5 bars of pressure. The perfect shot requires 9-10 bar.

In recent years, compressed air-driven best espresso maker machines have been gaining popularity. They use an air compressor to force hot water through the ground. They are also more mobile than electric steam-driven espresso machines.