16 Must-Follow Facebook Pages For Machine Espresso Marketers > 자유게시판

• 목록
• 답변
• 글쓰기
• 게시판 리스트 옵션
  • 수정
  • 삭제

How Does Machine Espresso Work?

Machine espresso makes use of precise pressure and amazing filter technology to make the delicious coffee we enjoy. What 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 making drip best coffee espresso machine. However, the pressure is the primary difference.

The Group Head

The group head is the portafilter you put in when making espresso. It is responsible for dispersing the water into the portafilter and controlling the pressure of the extraction. There are a variety of group heads, each with its own advantages and disadvantages. Some focus on temperature stability, others on pre-infusion features, and others are designed to control the lever. There are also some that come with a range of features, like the E61 one, which is to be the most popular among baristas due to its ability to offer multiple perks in a single package.

As you can see in the image above the head of the group is fitted with several notches. You can place your portafilter inside these notches, and then twist the head to lock it. There is also a gasket made of rubber in the notches and helps create the seal when you insert your portafilter into the machine. The notches allow for the precise placement of the portafilter. This is essential for an efficient extraction.

The group head is not just able to allow you to put in your portafilter easily however, it also keeps the temperature at a constant level. This is achieved by cycling hot water around the portafilter, and through the brew-basket, ensuring that the temperature is constant for extraction. It is important to note that even a small differences can make the distinction between a great and a excellent espresso.

The Pump

In contrast to piston machines that are manually operated, which use a lever to pressurize water, rotary espresso machines rely on motorized pumps to deliver the nine atmospheric bars of pressure necessary for espresso extraction. This pressure is built up by pumping water through a heat-exchanger and then through the ground coffee.

Pumps are typically less expensive than piston-driven machines, and tend to last longer. However, both types of machine can get damaged through overuse and lack of cleaning. They also add mechanical complexity, which can result in the cost of even the most basic models.

Some espresso machines remove the pump completely and use steam pressure to brew espresso. The disadvantage of this is that the same boiler that produces steam also raises the temperature of the water to the point of boiling which could lead to over-extraction. Additionally, these machines frequently have to restore their pressure between cups, which requires time and energy.

Many espresso machines utilize the rotary or vibration pump, which has a vibration model that uses a vibrating disc to create pressure, and a rotary model pushing hot water through the grounds under high speed. Both machines produce great espresso but rotary machines are quieter, more durable and less likely to fail.

The Boiler

The boiler is what will heat the water to the perfect temperature for extraction. The steam that is created gets to the portafilter which contains the espresso coffee grounds. It is then poured into the cup. During this process, steam creates pressure and pushes through the grounds of the coffee. This results in a layer of crema on top. This is one of the main characteristics of a good espresso.

There are three different types of espresso machines, each having a different type of pump and the temperature of the brew. There are various ways that the brew can be controlled as well as the dimensions of the cup the machine is capable of making.

The first espresso machines were steam type. The earliest espresso coffee machine uk machines were steam-type machines. This led to the coffee tasting bitter and burnt. This is why the Milanese producers Luigi Bezzerra and Desiderio Pavoni developed the modern espresso machine.

The most commonly used espresso maker is a semi-automatic machine with an electric pump. When people think of espresso coffee makers machines, Espresso machines they envision these machines. Semi-automatic machines require you to grind and tamp your beans yourself while the pump controls the flow of water and pressure. This is a fantastic solution that combines human control with mechanised consistency.

The Filter

Typically, espresso machines utilize filters that separate the coffee grounds as they pass through the hot water. The filter is also a vital component of the machine's temp control, since it helps to prevent overheating.

It also improves flavor, as it allows for a more prolonged bloom phase. This allows the beans to let their nuances out and provides an opportunity for better extraction.

However, it is important to remember that even a top 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 an espresso really taste great. The grouphead (also known as the brewhead) is where you place the portafilter, the thingy which you put the grounds of coffee into when making espresso.

Steam-driven espresso machines make use of hot water that is heated in an airtight vessel to create steam. The steam then moves hot water through the grounds of coffee at high pressure. They are less expensive and easier for the owner to maintain than pumps-driven models. However, they are limited in their ability to produce the perfect brewing conditions 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 machine small 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.