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

• 페이스북 공유
• 트위터 공유
• 

How Does Machine Compact espresso machine Work?

The machine espresso is made using precision pressure, and filter technology that is mind-blowing to make the coffee you enjoy. How exactly does it work?

To make an uk espresso machine hot water is forced under high pressure through finely ground coffee. The process is similar to making drip coffee but the key difference is in the pressure.

The Head of the Group

The group head is the portafilter that you put in when making espresso. It disperses water into the portafilter, and regulates the pressure of the extraction. There are a variety of types of group head each with its own advantages and disadvantages. Some are focused 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, like the E61 one, which is the classic choice among many baristas for its ability to offer multiple benefits in a single package.

As you can see in the above photo the group head is fitted with a variety of notches. You place your portafilter in these notches and then twist the head to secure it. A rubber gasket is located in the notches to create a seal when you insert your portafilter. The notches permit the precise placement of the portafilter. This is crucial for a consistent extraction.

The group head not only lets you to place your portafilter easily but also maintains the temperature at a constant level. It does this by cycling hot water through the brew basket and around the portafilter, making sure that it is always at the right temperature for extraction. This is vital, because even a few degrees can mean the difference between good and excellent espresso.

The Pump

In contrast to piston machines that are manually operated, which use a lever to pressurize water, rotary espresso machines rely on motorized pumps to deliver the nine atmospheric bars of pressure 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 cheaper than piston-driven models, and they tend to last longer, however both types of machines could be damaged by excessive use and inadequate cleaning. They also increase the complexity of mechanical systems, which can result in costly prices for even the most basic models.

Some espresso machines can eliminate the pump completely and utilize steam pressure to make espresso. This could lead to over-extraction since the boiler that makes steam also heats the water until it comes to a boil. Additionally, these machines frequently have to rebuild their pressure between cups, which requires time and energy.

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

The Boiler

The boiler is the part which heats the water to the optimal temperature to extract. The resultant steam then reaches the portafilter, which contains the ground espresso coffee and gets funnelled down into the cup. The steam causes pressure to push through the grounds of the coffee. This creates a foam on the top of the espresso. This is a hallmark of a great espresso.

There are three types of espresso makers, which differ in the type of pump they use and the degree of heat that the brew is. There are many ways to control the strength of the brew and the size of the cup that can be produced by the machine.

The first italian espresso machines machines were steam-types. They used one boiler to create both steam and brew but the pressure they could generate was low - only two bars of atmospheric pressure at most. This resulted in the coffee tasting burnt and bitter. This is why the Milanese makers Luigi Bezzerra and Desiderio Pavoni invented the modern espresso machine.

The most common espresso maker is a semi-automatic one with an electric pump. When people think of espresso machines, they envision these machines. With a semi-automatic machine you need to grind the beans and then tamp them by hand. The pump controls the flow of water and pressure. This is a perfect compromise between human control and mechanised accuracy.

The Filter

Espresso machines typically use filters that separate the grounds of the coffee from hot water. The filter is also a vital part of the temperature control system because it stops the machine from overheating.

A filter also helps with flavor as it allows for a longer flowering phase. This lets the beans release their flavors, and also allows for better extraction.

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

It's here that the magic happens. This is what makes espresso taste so delicious. The grouphead, often called the brew head, is where the portafilter (the container you place the ground coffee into) is located when you're making espresso.

In a steam-driven espresso machine, hot water is heated in an airtight container to produce steam, which is then pushed through the grounds at a high pressure. These types of machines are generally less expensive and simpler to maintain than pumps-driven models. However, they are limited in their ability to provide the perfect brewing conditions since they are only operating at 1-1.5 bars of pressure. While the perfect shot requires 9-10 bar.

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