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

How Does Machine Espresso Work?

Machine espresso uses precision pressure and mind-blowing filter technology to make the delicious coffee we enjoy. How exactly does it work?

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

The Head of the Group

The group head is the portafilter that is inserted when you are making espresso. It disperses water into the portafilter, and then regulates the pressure of extraction. There are various kinds of group head each with its own advantages and disadvantages. Some are specifically designed for temperature stability while others are built to handle pre-infusion. Others are made to control the lever. Some are a combination, like the E61. This is a preferred choice for baristas as it provides a variety of benefits in a single package.

As you can see in the photo above The group head features many notches in which you can place your portafilter and twist it by hand to secure it. There is also a gasket made of rubber that resides inside the notches and helps to create a seal when you insert your portafilter into the machine. The notches allow for an exact placement of the portafilter. This is vital for an even extraction.

The group head not only lets you to insert your portafilter easily but also maintains the same temperature. This is done by cycling hot water around the portafilter, and through the brew basin, ensuring that the temperature is always at the right level to extract the coffee. This is crucial, since just a few degrees could make the difference between a good and excellent Espresso Machine With Milk Frother (Https://Coffeee60102.Popup-Blog.Com/28250274/The-Not-So-Well-Known-Benefits-Of-Professional-Espresso-Machine).

The Pump

Motorized pumps in rotary espresso machines provide the nine atmospheric bar pressure required to extract espresso. This is different from manual piston machines which use levers. This pressure is built up by pumping water through a heat exchanger and then through the ground coffee.

Pumps are typically less expensive and last longer than piston-driven machines. However, both types of machines are susceptible to degrading due to excessive use and poor cleaning. Pumps are also more complicated mechanically, and can add to prices of even most basic models.

Some espresso machines use steam pressure instead of a pump to brew espresso. The downside 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. The machines also need to constantly rebuild their pressure in between cups. This requires energy and time.

Many espresso makers machines use the rotary or vibration pump. A vibration model utilizes an oscillating disk to create pressure, whereas the Rotary model pushes hot coffee through the ground at a high speed. Both machines can produce excellent espresso, but rotary machines are more quiet, durable and less likely to fail.

The Boiler

The boiler is the component which heats the water to the ideal temperature for extraction. The resulting steam is then transferred to the portafilter containing the ground espresso best coffee espresso machine, and is then funneled down into the cup. The steam creates pressure that pushes through the coffee grounds. This creates a crema on top of the espresso. This is one of the hallmarks of a great espresso.

There are three distinct types of espresso machines, each having different types of pumps and the temperature of the brew. There are a variety of ways in which the brew can be controlled, as well as the size of the cup the maker can create.

The earliest espresso machines were steam types. They utilized one boiler to create both steam and brew, however, the pressure they could generate was low - only two bars of atmospheric pressure at most. This led to the coffee tasting burnt and bitter. The modern espresso machine was developed by the Milanese makers Luigi Bezzerra & Desiderio Pavoni.

The most common espresso machine is a semiautomatic model with an electric pump. These are the images people have when they imagine an espresso machine. Semi-automatic machines require you to grind and tamp the beans yourself however the pump controls the water flow and pressure. This is a great compromise between the human touch and the mechanized accuracy.

The Filter

Espresso machines typically use filters that separate the grounds of coffee from hot water. The filter is also an essential element of the machine's temperature control, since it helps to prevent overheating.

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

However, it is important to keep in mind that even a top filter can produce a bad cup of coffee, as the quality of the beans and extraction are vital.

It's here that the magic occurs. This is what makes espresso taste so delicious. The grouphead (also known as the brewhead) is where you put the portafilter, which is the thingy used to place the grounds of coffee into when making espresso.

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

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