The Comprehensive Guide To Machine Espresso > 자유게시판

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How Does Machine Espresso Work?

Machine espresso uses precision pressure and amazing filter technology to make the coffee we love. What exactly is it?

To make an espresso hot water is pushed under 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 insert when brewing espresso. It distributes 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 are specifically designed for the stability of temperature while some are specifically designed to handle pre-infusion. Others are made to control the lever. There are even some that contain a variety of features, like the E61 one, which is to be the most popular among baristas for its ability to offer multiple benefits in one package.

As you can see in the photo above the head of the group is equipped with several notches. It is possible to place your portafilter into these notches and twist the head to lock it. There is also a rubber gasket in the notches to help create the seal when you insert your portafilter into the machine. The notches on the head allow for an exact positioning of the portafilter which is crucial to ensure a consistent extraction.

The group head not only lets you to place your portafilter easily, but it also maintains an even temperature. It does this by circulating hot water through the brew container and around the portafilter, making sure that it's always at the correct temperature for extraction. This is vital, because just a few degrees could make the difference between good and excellent espresso.

The Pump

Contrary to manual piston machines which rely on a lever to pressurize water, rotary small espresso machine machines rely on motorized pumps to provide the nine atmospheric bars of pressure needed to extract espresso. This pressure is built up by pumping water through a heat-exchanger and then through the ground coffee.

Pumps are generally less expensive and last longer than piston-driven machines. However, both types of machines are susceptible to degrading because of frequent use and poor cleaning. Pumps are also more complicated mechanically, which can raise the price of even the simple models.

Certain espresso machines eliminate the pump completely and instead employ steam pressure to create espresso. This could lead to over-extraction since the boiler that makes steam also heats the water to boil. The machines also need to continuously rebuild their pressure between cups. This takes energy and time.

Many espresso machines utilize the rotary or vibration pump, which has a vibration model using a rotating disc that generates the pressure, and rotating models that push hot water through the grounds under high speed. Both machines can make great espresso, however rotary machines are more quiet, durable and less likely to break down.

The Boiler

The boiler is the element that heats water to an optimal temperature for extraction. The resulting steam is then transferred to the portafilter containing ground espresso beans and is then pumped down into the cup. During this process, steam creates pressure and pushes through the coffee grounds. This produces a layer of crema on top. This is a sign of a good espresso.

There are three types of espresso machines, each having different types of pumps and brew temperature. There are different ways to control the strength of the brew and espresso machines the size of the cup that can be produced by the machine.

The first espresso machine sale machines (click the up coming webpage) were steam type. The first espresso machines were steam types. The coffee tasted bitter and burned. The modern espresso machine was created by the Milanese manufacturers Luigi Bezzerra & Desiderio Pavoni.

The most well-known espresso maker is a semi-automatic device with an electric pump. When people think of espresso machine sale machines, they envision these machines. Semi-automatic machines require you to grind and tamp the beans on your own, but the pump regulates the water flow and pressure. This is a fantastic combination of human control and mechanized reliability.

The Filter

Typically, espresso machines utilize filters that separate the grounds of coffee as they move through the hot water. The filter is also a vital element of the machine's temperature control, since it stops overheating.

Filters also aid in flavor as it allows for an extended flowering time. This helps the beans to release their flavors and provides an opportunity to improve extraction.

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

It's in this area that the magic takes place. This is what makes espresso taste so good. The grouphead (also known as the brewhead) is where you place the portafilter, the thingy which you put the grounds of coffee into while making espresso.

Steam-driven espresso machines make use of hot water heated in an airtight container to make steam. The steam then pushes hot water into the grounds of coffee at high pressure. They are less expensive and easier for the user to maintain than pumps-driven models. However, they are limited in their ability to provide the ideal brewing conditions, as they only operate at 1-1.5 bars of pressure. The perfect shot requires 9-10 bar.

In recent years, compressed-air-pump-driven espresso machines have been gaining popularity. They use an air-compressor to push hot water across the ground and are much more mobile than electric steam-driven espresso machines.