Nine Things That Your Parent Taught You About Machine Espresso > 자유게시판

How Does Machine Espresso Work?

The machine espresso utilizes precision pressure, and a filter technology that is awe-inspiring to make the coffee you love. What exactly does it work?

Espresso is created by forcing hot water under pressure through finely-ground coffee. The process is similar bean to cup espresso machines that of making drip coffee. However, the pressure is the major difference.

The Group Head

The group head is the portafilter that you insert when brewing espresso. It is responsible for dispersing water into the portafilter and then controlling the pressure of the resulting extraction. There are various kinds of group head, each with their unique advantages and disadvantages. Some are focused on temperature stability, while others on pre-infusion capabilities, and still others are designed to control the lever. Some include a combination such as the E61. This is a favorite among baristas because it offers multiple advantages in a single package.

As you can see from the above photo, the group head has a number of notches. It is possible to place your portafilter into these notches and twist the head to secure it. There is also a gasket made from rubber which is located inside the notches and helps to create the seal when you insert your portafilter into the machine. The notches on the head allow for an exact placement of the portafilter, which is vital for an efficient extraction.

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

The Pump

In contrast to manual piston machines that use a lever to pressurize water, rotating espresso machines rely upon motorized pumps that provide the nine atmospheric bars of pressure required to extract espresso. This pressure is generated by pumping water through a heat-exchanger and then through the ground coffee.

Pumps are generally less expensive than piston-driven machines, and they tend to last longer, but both types of machines could become damaged due to excessive use and poor cleaning. They also increase the complexity of mechanical systems and can lead to costly prices for even the simplest models.

Some espresso machines use steam pressure instead of a pump 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 constantly rebuild their pressure between cups. This takes energy and time.

A majority of espresso machines use the rotary or vibration pump, with a vibrating model using a vibrating disc to create the pressure and an rotary model that pushes hot water through the grounds at high speed. Both machines can produce excellent espresso, however rotary machines are more stable, quieter and less likely to break down.

The Boiler

The boiler is the part that heats water to the ideal temperature for extraction. The resultant steam then reaches the portafilter which holds the ground cafe espresso machine coffee machine with milk frother (hopper-lindgren-2.blogbright.net) coffee, and is then pumped down into the cup. The steam creates pressure and pushes through the grounds of the coffee. This creates a crema on the top of the espresso. This is one of the main characteristics of a good espresso.

There are three kinds of espresso makers. They differ in the kind of pump they use and how hot the espresso is. There are a variety of ways in which the brew can be controlled as well as the size of the cup that the machine can make.

The first espresso machine coffee machines were steam-type. The first espresso machines were steam-type machines. The coffee tasted bitter and burned. This is why Milanese manufacturers Luigi Bezzerra and Desiderio Pavoni created the modern espresso machine.

The most commonly used espresso machine is a semiautomatic model with an electric pump. When people think of espresso machines, they think of these machines. Semi-automatic machines require you to grind and tamp the beans on your own however the pump controls the water flow and pressure. This is an excellent compromise between human control and mechanised accuracy.

The Filter

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

It also helps with flavor, as a filter can allow for a longer bloom phase. This helps the beans to release their flavor and gives the chance for better extraction.

It is important to remember that even the best filter could result in a poor cup of coffee. The quality of the beans and the extraction process, remain vital.

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 put the portafilter, which is the thingy that you put the coffee grounds into, when making espresso.

In a steam-driven buy espresso makers machine hot water is heated in an airtight tank to produce steam, which is then pushed through the grounds at a high pressure. These machines are less expensive and easier to maintain than pumps-driven models. However, they are not as efficient in their ability to provide the ideal conditions for brewing since they are only operating at 1-1.5 bars of pressure. While the perfect shot requires 9-10 bars.

In recent years, compressed-air-pump-driven espresso machines have become more popular. They utilize an air compressor to push hot water into the grounds, and are far more portable than electric steam-driven machines.