Nine Things That Your Parent Teach You About Machine Espresso > 문의하기

How Does machine espresso - bookmarkcolumn.com - Work?

Machine espresso makes use of precise pressure and mind-blowing filter technology to create the delicious coffee we enjoy. What exactly is it that makes it work?

Espresso is produced by pushing hot water under 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 Group Head

The group head is the portafilter that you place in the espresso maker when making it. It is responsible for dispersing the water into the portafilter before controlling the pressure that results from the extraction. There are a variety of group heads each with their own advantages and disadvantages. Some are specifically designed for the stability of temperature while some are designed to handle pre-infusion. Others are built to control the lever. There are some that contain a variety of features, such as the E61, which is considered to be the most popular among baristas due to its ability to offer multiple benefits in one package.

As you can see in the photo above the group head is fitted with a variety of notches. The portafilter is placed in these notches and then twist the head to lock it. There is also a gasket made of rubber in the notches and helps create a seal when you insert your portafilter into the machine. The notches allow for precise placement of the portafilter. This is crucial to ensure a consistent extraction.

In addition to allowing you to easily connect your portafilter, the group head is responsible for maintaining a consistent temperature. This is done by cycling hot water around the portafilter and through the brew-basket to ensure that the temperature is at the right level for extraction. This is crucial, since even a few degrees can make the difference between excellent and great espresso.

The Pump

Unlike manual piston machines, which use a lever to pressurize water, rotating espresso machines rely upon motorized pumps to supply the nine atmospheric bars of pressure required to extract buy espresso machines. The pressure is created by drawing tap water from a reservoir and pumping it through a heat exchanger prior being pushed through the ground coffee in the group head.

Pumps are generally less expensive and last for longer than piston-driven machines. However, both kinds of machines may degrade due to overuse and poor cleaning. They also create mechanical complexity which can result in the cost of even the simplest models.

Some espresso machines make use of steam pressure instead of a pump to make espresso. This can lead to over-extraction as the boiler that makes steam also causes the water best bean to cup espresso machine boil. The machines also need to continually rebuild their pressure between cups. This takes energy and time.

Many espresso machines utilize an rotary or vibrating pump, which has a vibration model using a vibrating disc to create the pressure and rotating models that push hot water through the grounds at high speed. Both machines can make excellent best home espresso machine but rotary machines are quieter, more durable and less likely to break down.

The Boiler

The boiler is the part that heats the water to the ideal temperature for extraction. The resulting steam reaches the portafilter containing the ground espresso and is then pumped down into the cup. During this process, steam creates pressure to push through the grounds of the coffee. This creates a layer crema that is then poured over. This is one of the hallmarks of a great espresso.

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

The first espresso machines were steam-types. They had one boiler to create both steam and brew, however, the pressure they could produce was not very high - two bars of atmospheric pressure, at most. This led to the coffee tasting bitter and burnt. The modern espresso machine was invented by the Milanese producers Luigi Bezzerra & Desiderio Pavoni.

The most popular espresso maker is a semiautomatic machine with an electric pump. When people think of barista espresso coffee machine machines, they envision these machines. If you have a semi-automatic machine you grind the beans and then tamp them by hand, but the pump regulates the flow of water and pressure. This is a perfect combination of human control and mechanized reliability.

The Filter

Espresso machines typically have a filter that separates the grounds of the coffee from the hot water. The filter is also a vital element of the temperature control system, since it helps prevent the machine from overheating.

It also aids in flavor, as it allows for a longer bloom phase. This lets the beans let their nuances out, and allows 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 important.

This is where the magic happens, it's what makes espresso machine with milk frother taste great. The grouphead, sometimes called the brewhead, is where the portafilter (the container you place the coffee ground into) is placed when making espresso.

In a steam-driven espresso machine, hot water is heated in an airtight tank to create steam. Steam then pushes the hot water 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 create the ideal conditions for brewing as they only operate at 1-1.5 bars of pressure, while the perfect shot requires 9-10 bars.

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