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

How Does Machine Espresso Work?

The machine espresso makes use of precision pressure, and a filter technology that is awe-inspiring to create the coffee you love. But how exactly does it work?

Gaggia Ri8427/11 Espresso Machine - Professional Stainless Steel is made by pushing hot water at high pressure through finely-ground coffee. The process is similar to making drip coffee. However it is the pressure that makes the main difference.

The Head of the Group

As the name suggests, the group head is the place you place your portafilter while making espresso. It is responsible for dispersing water into the portafilter and then controlling the pressure of the resulting extraction. There are a variety of group heads, each with its own advantages and drawbacks. Some are designed to provide stability in temperature, while others are built to handle pre-infusion. Others are built to control the lever. Some have a combination, such as the E61. This is a popular choice among baristas due to the fact that it has multiple benefits in one package.

As you can see in the above image the group head is made up of many notches in which you can place your portafilter and then twist it by hand to secure it. A gasket made of rubber is placed in the notches to make a seal when you insert your portafilter. The notches on the head permit a precise position of the portafilter which is vital for an efficient extraction.

Apart from allowing you easily connect your portafilter, the group head is responsible to ensure that the temperature remains even. It does this by circulating hot water through the brew pan and around the portafilter, making sure that it's always at the correct temperature for extraction. It is crucial to keep in mind that even a few degree difference can make the difference between a great and a excellent espresso.

The Pump

Unlike manual piston machines, which rely on a lever to pressurize water, rotating espresso machines rely upon motorized pumps to supply the nine atmospheric bars of pressure necessary to extract espresso. This pressure is built up 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 kinds of machines are susceptible to degrading due to overuse and inadequate cleaning. They also add mechanical complexity which can result in the cost of even the simplest models.

Certain espresso machines can eliminate the pump entirely and utilize steam pressure to make espresso. This can cause over-extraction because the boiler that produces steam also causes the water to boil. Additionally these machines typically have to rebuild their pressure between cups, which requires time and energy.

Many espresso machines make use of the rotary or vibration pump, with a vibrating model using a rotating disc to create pressure, and an rotary model that pushes hot water through the grounds at high speed. Both machines can make excellent espresso, but rotary machines are more stable, quieter and less likely to fail.

The Boiler

The boiler is what heats the water to the perfect temperature to extract. The resulting steam reaches the portafilter which holds the ground espresso coffee and is then pumped into the cup. The steam creates enough pressure to push Buy The Best Coffee Machines For Sale Online coffee grounds through. This creates a foam on top of the espresso. This is one of the hallmarks of a good espresso.

There are three types of espresso makers, and they differ in the type of pump they employ and the degree of heat that the coffee is. There are different 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 types. The earliest espresso machines were steam-type machines. The coffee tasted bitter and burnt. This is the reason why Milanese makers Luigi Bezzerra and Desiderio Pavoni created the modern espresso machine.

The most well-known espresso machine is a semiautomatic one with an electric pump. When people think of espresso machines, they envision these machines. Semi-automatic machines require you to grind and tamp the beans by yourself while the pump controls the water flow and pressure. This is an excellent solution that combines human control with mechanized reliability.

The Filter

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

A filter can also help with flavor because it allows for the beans to flower for a longer period of time. This lets the beans release their flavor and allows for better extraction.

However it is crucial to remember that even a top filter can produce a bad cup of coffee, as the quality of the beans and extraction is vital.

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

Steam-driven espresso machines use hot water heated in an airtight container to produce steam. The steam then pushes hot water through coffee grounds under high pressure. They are less expensive and easier for the owner to maintain than pumps-driven models. However, they are not as efficient in their ability to create the perfect conditions for brewing, since they operate at 1-1.5 bars of pressure. However, 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 through the ground and are more mobile than steam-driven electric espresso machines.