How Do You Explain Machine Espresso To A Five-Year-Old > 자유게시판

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

How Does Machine Espresso Work?

The machine espresso makes use of precision pressure, and a filtering technology that is amazing to make the coffee you enjoy. But how exactly does it work?

To make espresso hot water is forced under high pressure through finely ground coffee. The process is similar to making drip coffee. However the pressure is the primary difference.

The Head of the Group

The group head is the portafilter you place in the espresso maker when making it. It is responsible for dispersing the water into the portafilter and then controlling the pressure of the resulting extraction. There are a variety of group heads each with distinct advantages and drawbacks. Some are focused on temperature stability, others on pre-infusion options, and others are designed best bean to cup espresso machine control the lever. Some have a combination, such as the E61. This is a very popular choice for baristas since it provides multiple benefits in one package.

As you can see in the above photo the group head is made up of many notches in which you can place your portafilter before twisting it with your hands to lock it in. A gasket of rubber is situated in the notches to make a seal when you insert your portafilter. The notches on the head permit a precise location of the portafilter which is vital for a consistent extraction.

The group head not only allows the portafilter to be inserted easily but also maintains a constant temperature. It does this by circulating hot water through the brew pan and around the portafilter, ensuring that it is always at the right temperature for extraction. It is important to realize that even a few degree variation can mean the difference between a decent and a excellent espresso.

The Pump

Motorized pumps in espresso machines rotary provide nine atmospheric bars of pressure required for espresso extraction. This is different from manual piston machines that use a lever. This pressure is built up by pumping water through a heat-exchanger and then through the ground coffee.

Pumps tend to be less expensive than piston-driven machines and tend to last longer, although both types of machines can degrade with overuse and insufficient cleaning. Pumps are also more complex mechanically, and can add to the cost of even the simpler models.

Some italian Espresso machine machines remove the pump entirely and use steam pressure to brew espresso coffee machines uk. The drawback of this is that the boiler that produces steam also raises the temperature of water until it reaches boiling, which can lead to excessive extraction. The machines also need to continually rebuild their pressure between cups. This requires energy and time.

A majority of espresso machines use either a rotary or vibration pump, with a vibration model using a rotating disc to create pressure and the rotary model pushing hot water through the grounds at high speed. Both machines can make great espresso but rotary machines are quieter, more durable and less likely to fail.

The Boiler

The boiler is the part which heats the water to the ideal temperature for extraction. The resulting steam is then transferred to the portafilter which holds the ground espresso coffee and is then pumped into the cup. In this process, the steam creates pressure that pushes through the coffee for espresso machine grounds. This results in a whipped-up top of the buy espresso makers. This is a sign of a good espresso.

There are three types of espresso machines, each with distinct pumps and the temperature of the brew. There are a variety of ways to control the amount of brew, as well as the size of the cup that can be produced by the machine.

The first best cheap espresso machine machines were steam-types. The earliest espresso machines were steam-type machines. The coffee tasted bitter and burnt. This is why Milanese makers Luigi Bezzerra and Desiderio Pavoni created the modern espresso machine.

The most common espresso maker is a semi-automatic device with an electric pump. When people think of espresso machines, they imagine these machines. Semi-automatic machines require you to grind and tamp the beans by yourself while the pump controls the water flow and pressure. This is a great compromise between the human touch and the mechanized consistency.

The Filter

Typically, espresso machines have filters to separate the grounds of the coffee as they go through the hot water. The filter is also an essential component of the machine's temp control, since it stops overheating.

A filter can also help with flavor because it allows for a longer flowering period. This allows beans to release their flavor and gives an opportunity to improve extraction.

However it is crucial to remember that even a great filter can result in a poor cup of coffee, as the quality of the beans and extraction are important.

This is where the magic happens. It's what makes espresso taste good. The grouphead (also called the brewhead) is where you put the portafilter, which is the thingy used to place the coffee grounds into, when making espresso.

In the steam-driven espresso machine hot water is heated in an airtight tank to create steam. Steam is then pushed through the grounds under high pressure. These types of machines are usually less expensive and simpler to maintain than pump-driven models. They are however limited to create the perfect conditions for brewing, as they operate with 1-1.5 bar of pressure. 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 through the grounds and are much more portable than electric steam-driven machines.