This Is The Ugly Reality About Machine Espresso > 자유게시판

How Does Machine Espresso Work?

The machine espresso is made using precise pressure, as well as a filter technology that is awe-inspiring to create the coffee you love. How exactly does it work?

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

The Head of the Group

The group head is the portafilter is inserted when you are making espresso. It disperses water in the portafilter, and then regulates the pressure during the extraction. There are numerous kinds of group heads, each with its own advantages and drawbacks. Some are designed for the stability of temperature while some are designed to handle pre-infusion. Others are made to control the lever. Some come with a combination of both, such as the E61. This is a popular choice among baristas as it provides a variety of benefits in a single package.

As you can see in the above photo The group head features several notches to place your portafilter and twist it manually to lock it in. A gasket of rubber is situated in the notches to create a seal when you insert your portafilter. The notches allow for an exact placement of the portafilter. This is crucial to ensure an efficient extraction.

Apart from allowing you easily place your portafilter in, the group head is also responsible for maintaining a consistent temperature. This is achieved by cycling hot water around the portafilter, and through the brew basin, ensuring the temperature is always right for extraction. It is crucial to keep in mind that even a tiny deviation can make the difference between a great and a excellent espresso.

The Pump

The motorized pumps that are used in espresso machines rotary provide nine atmospheric bar pressure needed to extract espresso. This differs from manual piston machines which use a lever. The pressure is created by drawing tap water from a reservoir and pumping it through a heat exchanger prior to it is shot through the ground coffee in the group head.

Pumps tend to be cheaper than piston-driven models, and they tend to last longer, however both types of machines can be damaged by excessive use and inadequate cleaning. They also increase the complexity of mechanical systems that can lead to an expensive price for even the most basic models.

Some espresso machine with frother machines employ steam pressure instead of a pump for brewing espresso. This could lead to over-extraction since the boiler that produces steam also heats the water to boil. Additionally these machines typically have to restore their pressure between cups, which requires time and energy.

A majority of espresso machines utilize an rotary or a vibration pump. A vibration model uses an oscillating disk to create pressure, while a rotating model pushes hot water through the ground at a rapid speed. Both types of machine can make excellent espresso, but the rotary pumps are quieter, and more durable than vibration pumps.

The Boiler

The boiler is the one that is used to heat the water to the right temperature to extract. The resulting steam is then transferred to the portafilter that contains the ground espresso coffee and is then pumped down into the cup. The steam causes enough pressure to push the grounds of coffee through. This creates a foam on top of the espresso. This is one of the main characteristics of a good espresso.

There are three types of espresso makers. They differ in the type of pump they use and how hot the coffee is. There are many ways to control the brew and the size of the cup that can be made by the machine.

The first espresso machines were steam-types. They used one boiler to create both brew and steam, but the pressure they could produce was not very high - two bars of atmospheric pressure maximum. This led to the coffee tasting burnt and bitter. The modern best home espresso machine machine was developed by the Milanese makers Luigi Bezzerra & Desiderio Pavoni.

The most popular espresso maker is a semi-automatic espresso machine machine with an electric pump. This is what people envision when they think of an espresso maker. With a semi-automatic espresso machine, you have to grind the beans and tamp them by hand. The pump regulates the flow of water and pressure. This is a fantastic combination of human control and mechanized consistency.

The Filter

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

It also helps with flavor, as it lets you enjoy a longer bloom time. This lets the beans let their nuances out, and also allows for better extraction.

However it is crucial to keep in mind that even a good filter could result in a bad cup of coffee, because the quality espresso machine of the beans and extraction is vital.

This is where the magic happens, it's what makes espresso taste great. The grouphead (also known as the brewhead) is where you place the portafilter, which is 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 create steam. Steam then pushes the hot water through the grounds at a high pressure. These machines are cheaper and are easier for the user to maintain than pumps-driven models. However, they are limited in their capacity to create the ideal 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-driven espresso machines have been gaining popularity. They use an air compressor to force the hot water through the grounds and are much more portable than steam-driven electric machines.