The No. One Question That Everyone Working In Machine Espresso Needs To Know How To Answer > 자유게시판

How Does Machine Espresso Work?

The machine espresso makes use of precise pressure, as well as a filter technology that is mind-blowing to create the coffee you love. How does it work exactly?

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

The Head of the Group

The group head is the portafilter that you place in the espresso maker when making it. It disperses water into the portafilter, and controls the pressure of the extraction. There are several different types of group head each with its unique advantages and disadvantages. Some are designed for temperature stability while others are specifically designed to handle pre-infusion. Others are made to control the lever. Some include a combination such as the E61. This is a favorite among baristas as it provides a variety of advantages in a single package.

As you can see in the above image, the group head has numerous notches that you can place your portafilter and then twist it manually to secure it. There is also a rubber gasket that resides inside the notches to help create a seal when you insert your portafilter into the machine. The notches permit precise placement of your portafilter. This is crucial to ensure an efficient extraction.

The group head does not just allow you to place your portafilter easily however, it also keeps the same temperature. It does this by circulating hot water through the brew basket and around the portafilter to ensure that it's always at the correct temperature for extraction. This is crucial, since even a few degrees can make the difference between a excellent and great espresso.

The Pump

Contrary to manual piston machines which use a lever to pressurize water, Rotary espresso machines rely on motorized pumps to provide the nine atmospheric bars of pressure necessary for espresso maker for home extraction. The pressure is created by removing tap water from a reservoir and pumping it through a heat exchanger prior to being shot through the ground coffee inside the group head.

Pumps are generally less expensive and last for longer than piston-driven machines. However, both types of machines may degrade because of frequent use and poor cleaning. Pumps are also more complex mechanically, which can increase the cost of even the most basic models.

Certain espresso machines utilize steam pressure instead of a pump for brewing espresso. The drawback is that the boiler that produces steam also raises the temperature of water until it reaches boiling which could lead to over-extraction. The machines also need to continuously rebuild their pressure between cups. This requires energy and time.

Many espresso machines utilize an rotary or vibrating pump, with a vibration model using a vibrating disc that generates the pressure, and a rotary model pushing hot water through the grounds at high speed. Both machines can make excellent espresso, however rotary machines are quieter, more durable and less likely to fail.

The Boiler

The boiler is the component that heats water to the ideal temperature for extraction. The steam created will eventually reach the portafilter, which holds the buy espresso machines grounds. It is then pumped into the cup. During this process, the steam creates pressure that pushes through the grounds of the coffee. This results in a crema on top of the espresso. This is one of the hallmarks of a good espresso.

There are three kinds of espresso makers. They differ in the type of pump they employ and the degree of heat that the brew is. There are various ways to control the strength of the brew and espressomachines the size of cup that can be produced by the machine.

The earliest espresso machines were steam type. They used one boiler to make both steam and brew but the pressure they could generate was low - only two bars of atmospheric pressure at most. This resulted in the coffee tasting burnt and bitter. The modern espresso coffee machine for home machine was created by the Milanese makers Luigi Bezzerra & Desiderio Pavoni.

The most common espresso machine is a semiautomatic with an electric pump. These are the things people think of when they think of an espresso maker. With a semi-automatic machine you need to grind the beans and then tamp them by hand, but the pump controls the flow of water and pressure. This is a fantastic compromise between human control and mechanized reliability.

The Filter

Espresso machines usually use a filter that separates the grounds of the coffee from hot water. The filter is also an essential component of the machine's temperature control, as it helps prevent overheating.

A filter also helps with flavor because it allows for an extended flowering time. This allows the beans to release their nuances and gives the chance for better extraction.

It is important to keep in mind that even the best filter can result in a bad cup of coffee. The quality of the beans, as well as the extraction, are still crucial.

This is where the magic happens, it's the thing that makes espresso machines for home taste great. The grouphead, sometimes called the brew head, is where the portafilter (the thing you put the ground coffee into) is placed when you're making espresso.

Steam-driven espresso machines make use of hot water that is heated inside an airtight container to produce steam. The steam then pushes hot water through coffee grounds under high pressure. These machines are cheaper and easier to maintain than pumps-driven models. They are however limited for creating the ideal brewing conditions as they only operate with 1-1.5 bar of pressure. The ideal shot requires 9-10 bars.

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