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線上FAQ分類: QuestionsNine Things That Your Parent Teach You About Machine Espresso
Odell Malley asked 2 天 ago

How Does Machine Espresso Work?

Machine espresso makes use of precise pressure and mind-blowing filter technology to make the coffee we love. What exactly is it?

espresso capsule machine is produced by pushing hot water under high pressure through finely-ground coffee. The process is similar to making drip coffee but the difference is in the pressure.

The Group Head

The group head is the portafilter that you put in when making espresso. It is responsible for dispersing water into the portafilter before controlling the pressure of the extraction. There are numerous kinds of group heads each with their own advantages and disadvantages. Some focus on temperature stability, some on pre-infusion features, and others are designed to control the lever. Some include a combination like the E61. This is a favorite among baristas since it provides multiple advantages in one package.

As you can see in the image above the group head comes with many notches in which you can place your portafilter and then twist it by hand to secure it. A gasket made of rubber is placed inside the notches, which helps create a seal while you insert your portafilter. The notches allow for precise placement of the portafilter. This is crucial to ensure an accurate extraction.

The group head is not just able to allow the portafilter to be inserted easily however it also keeps an even temperature. This is achieved by cycling hot water around the portafilter and through the brew-basket, making sure that the temperature is at the right level for extraction. This is important, as even a small espresso machine difference in temperature can make the difference between excellent and great espresso.

The Pump

Motorized pumps in espresso machines that rotate provide the nine atmospheric bar pressure required to extract espresso. This differs from manual piston machines that use a lever. The pressure is created by pumping water through a heat-exchanger and then through the ground coffee for espresso machine.

Pumps are typically less expensive than piston-driven machines, and tend to last longer, although both types of machine can become damaged due to excessive use and poor cleaning. Pumps are also more complex mechanically, which can increase the cost of even simpler models.

Certain espresso machines utilize steam pressure instead of a pump to brew espresso. The downside is that the boiler that produces steam also raises the temperature of water until it reaches boiling which can cause excessive extraction. Additionally these machines are often required to restore their pressure between cups, which requires time and energy.

Many espresso machines employ either a rotary or vibration pump, with a vibrating model that uses a vibrating disc to generate the pressure, and the rotary model pushing hot water through the grounds at high speed. Both types of machine are capable of producing excellent espresso, but the rotary pumps are quieter, and more durable than vibration pumps.

The Boiler

The boiler is the one that makes the water warm to a temperature that is ideal for extraction. The steam created gets to the portafilter which is the container that holds the espresso coffee grounds. It is then poured into the cup. During this process the steam causes enough pressure to push the coffee grounds through. This creates a crema on top of the espresso. This is the hallmark of a great espresso.

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

The first espresso machines were steam type. They utilized one boiler to make both steam and brew, however, the pressure they could create was minimal – two bars of atmospheric pressure maximum. The coffee tasted bitter and burned. The modern espresso machine was developed by the Milanese makers Luigi Bezzerra & Desiderio Pavoni.

The most popular espresso machine is a semiautomatic model with an electric pump. These are the things people think of when they imagine an espresso machine. Semi-automatic machines require you to grind and tamp the beans by yourself, but the pump regulates the flow of water and pressure. This is an excellent combination of human control and mechanized consistency.

The Filter

Typically, espresso machines utilize filters to 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.

A filter can also help with flavor, as it permits a longer flowering phase. This lets the beans release their nuances, and allows for better extraction.

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

It’s here that the magic happens. This is the reason why espresso tastes so delicious. The grouphead, sometimes referred to as the brewhead, is where the portafilter (the thingy you put the coffee grounds into) is placed when you’re making espresso.

Steam-driven espresso machines use hot water heated in an airtight container to produce steam. The steam then pushes hot water through grounds of coffee at high pressure. These kinds of machines are typically less expensive and simpler to maintain than pump-driven models. However, they are not as efficient in their ability to produce the perfect brewing conditions because they operate at 1-1.5 bars of pressure, while the perfect shot requires 9-10 bar.

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

Nine Things That Your Parent Teach You About Machine Espresso
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