The Most Advanced Guide To Machine Espresso > 고객센터

How Does Machine Espresso Work?

The machine espresso is made using precision pressure, and filtering technology that is amazing to create the coffee you enjoy. But how exactly does it work?

In order bean to cup espresso machines make espresso, hot water is pushed under pressure through finely ground coffee. The process is similar to making drip coffee, but the major difference is in the pressure.

The Group Head

The group head is the portafilter you put in when making espresso. It is responsible for espressomachines dispersing the water into the portafilter and then controlling the pressure of the extraction. There are a variety of group heads each with its own advantages and drawbacks. Some are designed for stability in temperature, while others are specifically designed to handle pre-infusion. Some are designed to control the lever. Some come with a combination of both, like the E61. This is a favorite among baristas since it provides multiple benefits in a single package.

As you can see in the above image The group head features many notches in which you can put your portafilter, then twist it with your hands 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 on the head permit a precise location of the portafilter which is necessary for an efficient extraction.

In addition to allowing you to easily place your portafilter in, 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 to ensure that the temperature is constant for extraction. This is important because just a few degrees could make the difference between good and great espresso.

The Pump

Contrary to manual piston machines that use a lever to pressurize water, the rotary espresso machines use motorized pumps to provide the nine atmospheric bars of pressure that are required to extract espresso. The pressure builds by drawing tap water from a reservoir, and pumping it through a heat exchanger prior it is shot through the ground coffee in the group head.

Pumps are generally cheaper and last longer than piston-driven machines. However, both types of machines may degrade due to excessive use and insufficient cleaning. They also make mechanically complex and can lead to costly prices for even the most basic models.

Certain espresso machines do away with the pump completely and instead utilize steam pressure to make espresso. This can result in over-extraction because the boiler that makes steam also causes the water to boil. They also have to continually rebuild their pressure between cups. This requires energy and time.

Many espresso machines use an rotary or a vibration pump. A vibration model makes use of an oscillating disk to create pressure, while the rotary model pushes hot water through the ground at high speed. Both machines can make great espresso however rotary machines tend to be more stable, quieter and less likely to break down.

The Boiler

The boiler is the element that heats water to an ideal temperature to extract. The steam that is created gets to the portafilter which is the container that holds the espresso coffee grounds. It is then funneled into the cup. The steam creates pressure that pushes through the grounds of the coffee. This results in a layer of crema on top. This is a hallmark of a great espresso.

There are three types of espresso makers, and they differ in the type of pump they use and how hot the coffee is. There are different ways in which the brew could be controlled, as well as the size of the cup the machine can produce.

The first espresso machines were steam-type. The earliest espresso machines were steam types. The coffee tasted bitter and burnt. The modern espresso machine was invented by the Milanese manufacturers Luigi Bezzerra & Desiderio Pavoni.

The most popular espresso machine is a semiautomatic that has an electric pump. When people think of espresso machines, they envision these machines. With a semi-automatic espresso machine machine, you must grind the beans and then tamp them by hand, but the pump is able to regulate the flow of water and pressure. This is an excellent compromise between human control and mechanized reliability.

The Filter

Typically, espresso machines have filters that separate the coffee grounds as they pass through the hot water. The filter is also an essential component of the machine's temperature control, as it prevents overheating.

Filters also aid in flavor since it allows for the beans to flower for a longer period of time. This helps the beans release their flavor and gives an opportunity for a better extraction.

However it is crucial to keep in mind that even a great filter can make a terrible cup of coffee, as the quality of the beans and extraction are crucial.

It's here that the magic occurs. This is what makes espresso coffee machines for sale (http://lineyka.org/) taste so good. The grouphead, often called the brew head, is the place where the portafilter (the container you place the coffee grounds into) is placed when 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 under high pressure. They are less expensive and easier for the owner to maintain than pumps-driven models. They are however limited to create the ideal conditions for brewing since they only operate with 1-1.5 bar of pressure. The ideal shot requires 9-10 bars.

In recent years, compressed air-driven espresso machines have been gaining popularity. They utilize an air compressor to force hot water into the grounds and are much more portable than electric steam-driven machines.