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

How Does Machine espresso coffee machine uk Work?

Machine espresso makes use of precise pressure and amazing filter technology to make the perfect cup of coffee. But how exactly does it work?

Espresso is made by pushing hot water under pressure through finely ground coffee. The process is similar to making drip coffee but the difference is in the pressure.

The Group Head

As the name implies the group head is the place you place your portafilter while brewing espresso. It disperses water into the portafilter, and then regulates the pressure of extraction. There are several different types of group head, each with their distinct advantages and drawbacks. Some are focused on temperature stability, whereas 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 preferred choice for baristas since it provides multiple benefits in one package.

As you can see in the above photo The group head features many notches in which you can place your portafilter and then twist it manually to lock it in. There is also a gasket made from rubber in the notches, which helps create the seal when you insert your portafilter into the machine. The notches on the head permit an exact positioning of the portafilter which is necessary to ensure an efficient extraction.

The group head does not just allow you to place your portafilter easily, but it also maintains a constant temperature. It does this by circulating hot water through the brew pan and around the portafilter to ensure that it's always at the correct temperature for extraction. It is crucial to keep in mind that even a small deviation can make the difference between a decent and a great espresso.

The Pump

In contrast to piston machines that are manually operated, which rely on a lever that pressurize water, the rotary espresso machines use motorized pumps to provide the nine atmospheric bars of pressure necessary to extract espresso. The pressure builds 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 than piston-driven machines and tend to last longer. However, both types of machines may become damaged due to excessive use and poor cleaning. Pumps are also more complicated mechanically, which could increase prices of even simplest models.

Some cafe espresso machine machines use steam pressure instead of a pump for brewing espresso. The drawback is that the same boiler that produces steam also raises the temperature of the water to boiling which could lead to excessive extraction. In addition these machines typically have to rebuild their pressure between cups, which requires time and energy.

Many espresso machines employ an rotary or vibrating pump, with a vibration model using a rotating disc to generate the pressure, and the rotary model pushing hot water through the grounds under high speed. Both types of machines can make a great espresso, but the rotary pumps are quieter, and more durable than vibration pumps.

The Boiler

The boiler is the one that is used to heat the water to the right temperature to extract. The steam produced reaches the portafilter, which contains the espresso coffee grounds. It is then funneled into the cup. During this process, the steam creates pressure and pushes through the coffee grounds. This results in a layer crema on top. This is one of the hallmarks of a good 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 espresso is. There are different ways in which the brew can be controlled as well as the size of the cup the machine is capable of making.

The earliest espresso machines were steam type. The first buy espresso makers machines were steam types. This resulted in the coffee tasting bitter and burnt. The modern espresso machine was invented by the Milanese producers Luigi Bezzerra & Desiderio Pavoni.

The most common espresso machine is a semiautomatic that has an electric pump. These are the things people think of when they think of an espresso maker. Semi-automatic machines require you to grind and tamp the beans yourself The pump, however, regulates the water flow and pressure. This is an excellent compromise between human touch and mechanized accuracy.

The Filter

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

A filter can also help with flavor since it allows for the beans to flower for a longer period of time. This allows the beans to release their flavor and also allows for better extraction.

It is important to keep in mind that even the finest filter can make a bad cup of coffee. The quality of the beans and the extraction, are still very important.

This is where the magic happens, it's the thing that makes an espresso really taste good. The grouphead, often called the brew head, is where the portafilter (the container you place the ground coffee in) sits when you're making espresso.

Steam-driven espresso machines make use of hot water heated in an airtight container to produce steam. The steam then pushes hot water through coffee grounds under high pressure. These kinds of machines tend to be cheaper and easier to maintain than pump-driven models. They are however limited in their ability to create the perfect conditions for brewing since they only operate with 1-1.5 bar of pressure. The ideal shot requires 9-10 bars.

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