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

How Does Machine Espresso Work?

The machine espresso uses precision pressure, and filter technology that is awe-inspiring to create the coffee you love. What exactly does it work?

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

The Group Head

The group head is the portafilter that you put in when making espresso. It disperses water in the portafilter, and regulates the pressure during the extraction. There are many different types of group heads, each with its own advantages and disadvantages. Some are specifically designed for the stability of temperature while some are specifically designed to handle pre-infusion. Others are built best bean to cup espresso machine control the lever. Some come with a combination of both, like the E61. This is a popular choice among baristas because it offers multiple advantages in one package.

As you can see in the above image the group head comes with several notches to place your portafilter and then twist it manually to secure it. A rubber gasket is located in the notches to create a seal as you insert your portafilter. The notches allow for precise placement of the portafilter. This is crucial to ensure an accurate extraction.

The group head is not just able to allow the portafilter to be inserted easily however it also keeps an even temperature. It does this by circulating hot water through the brew container and around the portafilter to ensure that it's always at the correct temperature to extract. This is important, as even a small difference in temperature can make the difference between a good and excellent espresso.

The Pump

Unlike manual piston machines, that use a lever to pressurize water, the rotary espresso machines use motorized pumps to deliver the nine atmospheric bars of pressure that are required for espresso extraction. The pressure is created by drawing tap water from a reservoir and pumping it through a heat exchanger prior being pushed through the ground coffee in the group head.

Pumps are typically cheaper and last longer than piston-driven machines. However, both kinds of machines are susceptible to degrading due to excessive use and inadequate cleaning. They also add mechanical complexity which can result in a high price tag on even the most basic models.

Some espresso machines do away with the pump entirely and make use of steam pressure to make espresso. The downside is that the same boiler that produces steam also raises the temperature of water until it reaches boiling and can result in excessive extraction. These machines also have to continually rebuild their pressure between cups. This requires energy and time.

Many espresso machines utilize either a rotary or vibration pump, which has a vibration model using a rotating disc to create the pressure, and rotating models that push hot water through the grounds at high speed. Both models can make excellent espresso, but Rotary machines are quieter and more durable than vibration pumps.

The Boiler

The boiler is the part which heats the water to the optimal temperature to extract. The steam that is produced reaches the portafilter, which contains the espresso coffee grounds. It is then poured into the cup. The steam creates pressure to push through the coffee grounds. This creates a layer crema that is then poured over. This is the hallmark of a good espresso.

There are three types of espresso machines, each having distinct pumps and brew temperature. There are a variety of ways that the brew can be controlled, as well as the size of the cup that the machine can make.

The first espresso machines were steam-based. The first espresso machines were steam types. The coffee tasted bitter and burned. The modern espresso machine was designed by the Milanese manufacturers Luigi Bezzerra & Desiderio Pavoni.

The most popular espresso maker is a semi-automatic one with an electric pump. This is what people envision when they think of an espresso coffee machines uk machine. With a semi-automatic espresso machine, you must grind the beans and 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 the mechanized consistency.

The Filter

Typically, espresso machines use a filter to separate out the grounds of coffee when they pass through the hot water. The filter is also a crucial component of the temperature control system, since it helps prevent the machine from overheating.

It also improves flavor, as it allows for a longer bloom time. This allows the beans to let their nuances out and provides the chance for better extraction.

However, it is important to keep in mind that even a top filter can make a terrible cup of coffee, since the quality of the beans and extraction is essential.

This is where the magic happens, and it's what makes espresso taste good. The grouphead (also known as the brewhead) is where you place the portafilter, the thingy that you put the coffee grounds into, when making espresso.

In a steam-driven espresso machine hot water is heated in an airtight container to produce steam, which then pushes the hot water through the grounds at high pressure. These types of machines are generally less expensive and easier to maintain than pump-driven models. However, they are limited in their capacity to create the perfect brewing conditions as they only operate at 1-1.5 bars of pressure. While the perfect shot requires 9-10 bars.

In recent years, compressed air-pump-driven espresso machines have been gaining popularity. They use an air compressor to push hot water across the ground and are much more mobile than steam-driven electric espresso machines.