• 목록
• 답변
• 게시판 리스트 옵션
  • 수정
  • 삭제

How Does Machine Espresso Work?

Machine cafe espresso machine uses precision pressure and incredible filter technology to produce the coffee we love. How exactly does it work?

Espresso is produced by pushing 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 Group Head

The group head is the portafilter you put in when making Espresso Machine With Grinder. It disperses the water into the portafilter, and then regulates the pressure of the extraction. There are a variety of group heads each with its own advantages and drawbacks. Some focus on temperature stability, others on pre-infusion capabilities, and still others are designed to control the lever. There are also some that have a combination of features, such as the E61 that is the classic choice among many baristas for its ability to offer multiple perks in a single package.

As you can see in the photo above the group head is made up of many notches in which you can place your portafilter before twisting it manually to lock it in. There is also a rubber gasket that is a part of the notches and helps create an airtight seal after inserting your portafilter into the machine. The notches permit the precise placement of the portafilter. This is essential for an accurate extraction.

The group head is not just able to allow the portafilter to be inserted easily, but it also maintains an even temperature. It does this by circulating hot water through the brew basket and around the portafilter, making sure that it's always at the correct temperature to extract. It is important to realize that even a slight variation can mean the difference between a great and a great espresso.

The Pump

The motorized pumps used in espresso machines rotary provide nine atmospheric bar pressure needed to extract espresso. This differs from manual piston machines that rely on a lever. The pressure is built by pumping water through a heat exchanger and then through the ground coffee.

Pumps are typically less expensive than piston-driven models, and they tend to last longer, however both types of machines can get damaged through overuse and lack of cleaning. Pumps are also more complex mechanically, which can raise prices of even most basic models.

Some espresso machines make use of steam pressure instead of a pump to brew espresso. The disadvantage of this is that the same boiler that produces steam also raises the temperature of water to the point of boiling and can result in excessive extraction. In addition the machines often have to restore their pressure between cups, which takes time and energy.

Many espresso machines make use of an rotary or a vibration pump. A vibration model utilizes an oscillating disk to create pressure, while a Rotary model pushes hot coffee through the ground at high speed. Both machines produce great espresso, however rotary machines are quieter, more durable and less likely to break down.

The Boiler

The boiler is what makes the water warm to a temperature that is ideal to extract. The steam that is produced will eventually reach the portafilter, which is the container that holds the espresso coffee grounds. It is then funneled into the cup. During this process the steam creates enough pressure to push the coffee grounds through. This creates a foam on the top of the espresso. This is one of the hallmarks of a good espresso.

There are three distinct types of espresso machines, each with a different type of pump and brew temperature. There are various ways to control the strength of the brew and the size of the cup that can be made by the machine.

The first espresso machines were steam type. The earliest espresso machines were steam types. This led to the coffee tasting burnt and bitter. The modern espresso machine was invented by the Milanese makers Luigi Bezzerra & Desiderio Pavoni.

The most popular espresso machine is a semiautomatic that has an electric pump. These are the things people think of when they think of an espresso machine. With a semi-automatic machine you need to grind the beans and then tamp them by hand. The pump regulates the flow of water and pressure. This is a fantastic solution that combines human control with mechanized reliability.

The Filter

Espresso machines typically use a filter that separates the grounds of coffee from hot water. The filter is also an essential element of the machine's temperature control, as it prevents overheating.

It also aids in flavor, since a filter lets you enjoy a longer bloom time. This allows beans to release their flavor and gives an opportunity for a better extraction.

However, it is important to remember that even a good filter could result in a bad cup of coffee as the quality of the beans and extraction are important.

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

Steam-driven espresso machines use hot water that is heated inside an airtight vessel to create steam. The steam then pushes hot water through grounds of coffee under high pressure. These machines are less expensive and easier for Espresso machine with grinder the owner to maintain than pumps-driven models. They are however limited for creating the ideal conditions for brewing as they only operate with 1-1.5 bar of pressure. The ideal shot requires 9-10 bars.

In recent years, espresso machines powered by compressed air-pump have become increasingly popular. They utilize an air compressor to force hot water through the ground, and are more mobile than electric steam-driven espresso machines.