9 . What Your Parents Teach You About Machine Espresso > 자유게시판

How Does Machine Espresso - Jszst.Com.Cn - Work?

Machine espresso makes use of precise pressure and mind-blowing filter technology to make the coffee we love. But 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 that of making drip coffee. However, it is the pressure that makes the main difference.

The Head of the Group

The group head is the portafilter is inserted when you are making espresso. It disperses water into the portafilter, and then regulates the pressure of the extraction. There are numerous kinds of group heads each with distinct advantages and drawbacks. Some are designed for stability of temperature while others are built to handle pre-infusion. Some are designed to control the lever. Some contain a variety of features, like the E61 one, which is the standard choice for many baristas because of its ability to offer multiple perks in one package.

As you can see in the above photo the head of the group is equipped with several notches. It is possible to place your portafilter in these notches and then turn the head around to secure it. A gasket made of rubber is positioned inside the notches, which helps create a seal when you insert your portafilter. The notches permit precise placement of the portafilter. This is essential for an accurate extraction.

Aside from allowing you to easily insert your portafilter, the group head is responsible to maintain an even temperature. This is done by cycling hot water around the portafilter and through the brew-basket, ensuring that the temperature is at the right level for extraction. This is vital, because even a few degrees can be the difference between a good and excellent espresso.

The Pump

Contrary to manual piston machines that use a lever to pressurize water, rotating espresso machines rely upon motorized pumps to supply the nine atmospheric bars of pressure needed for espresso extraction. This pressure is built up by pumping water through a heat-exchanger and then through the ground coffee and espresso machine.

Pumps tend to be less expensive than piston-driven machines, and they tend to last longer, but both types of machines may degrade with overuse and insufficient cleaning. They also create mechanical complexity, which can result in costly prices for even the simplest models.

Some professional espresso maker machines make use of steam pressure instead of a pump to make espresso. This could lead to over-extraction since the boiler that makes steam also warms the water to boil. In addition these machines are often required to restore their pressure between cups, which requires time and energy.

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

The Boiler

The boiler is the component which heats the water to the optimal temperature to extract. The steam that is produced will eventually reach the portafilter, which is a container for espresso makers grounds. It is then pumped into the cup. During this process the steam is able to create enough pressure to push the grounds of the coffee through. This creates a layer crema on top. This is a sign of a great espresso.

There are three kinds of espresso makers, which differ in the type of pump they use and the degree of heat that the espresso is. There are a variety of ways that the brew may be controlled as well as the dimensions of the cup the machine is capable of making.

The first espresso machines were steam-type. The first espresso machines were steam-type machines. The coffee tasted bitter and burned. The modern espresso machine was created by the Milanese producers Luigi Bezzerra & Desiderio Pavoni.

The most commonly used espresso maker is a semi-automatic machine with an electric pump. When people think of espresso machines, coffee for espresso machine; menwiki.men, they think of these machines. Semi-automatic machines require you to grind and tamp the beans by yourself The pump, however, regulates the water flow and pressure. This is a great compromise between the human touch and mechanized consistency.

The Filter

Espresso machines usually have filters that separate the coffee grounds from the hot water. The filter is also an essential component of the machine's temp control, since it stops overheating.

A filter can also help with flavor because it allows for a longer flowering period. This helps the beans to release their flavors and provides an opportunity for better extraction.

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

This is where the magic happens, it's the thing that makes espresso taste great. The grouphead, sometimes called the brewhead, is where the portafilter (the thingy you put the coffee ground into) is located when you're making espresso.

In an espresso machine that is driven by steam, hot water is heated in an airtight container to create steam. This is then pushed through the grounds at high pressure. These machines are cheaper and easier for the owner to maintain than pumps-driven models. However, they are limited in their ability to provide the perfect conditions for brewing, because they operate at 1-1.5 bars of pressure, while 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 force hot water through the ground, and are more mobile than electric steam-driven espresso machines.