| Where Will Machine Espresso Be 1 Year From What Is Happening Now? | |
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| by GXn | Date 2024-04-26 19:14:38 | hit 17 |
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이름 : Gino 이메일 : ginokendrick@yahoo.com 휴대폰 : 주소: (81036) -문의사항-  How Does Machine Espresso Work?Machine espresso uses precision pressure and amazing filter technology to make the delicious coffee we enjoy. How does it work exactly? In order to make espresso, hot water is pushed under pressure through finely ground coffee. The process is similar to making drip coffee. However the pressure is the major difference. The Head of the Group The group head is the portafilter you put in when making espresso. It disperses water into the portafilter, and then controls the pressure of the extraction. There are several different types of group head, each with their distinct advantages and disadvantages. Some are designed for temperature stability while others are built to handle pre-infusion. Some are designed to control the lever. Some have a combination of features, such as the E61 one, which is the standard choice for many baristas due to its ability to offer multiple benefits in a single package. As you can see from the image above the group head is fitted with several notches. You place your portafilter in these notches, then turn the head around to secure it. A gasket of rubber is situated in the notches to create a seal as you insert your portafilter. The notches allow for the precise placement of the portafilter. This is vital for a consistent extraction. In addition to allowing you effortlessly insert your portafilter the group head is responsible to maintain an even temperature. This is accomplished by cycling hot water around the portafilter and through the brew basin, ensuring that the temperature is at the right level to extract the coffee. It is important to realize that even a small differences can make the distinction between a decent and a great espresso. The Pump Motorized pumps in rotary espresso machines supply the nine atmospheric bar pressure needed to extract espresso. This is different from manual piston machines that use a lever. This pressure builds up by removing 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 and last for longer than piston-driven machines. However, both types of machines may degrade because of excessive use and poor cleaning. Pumps are also more complicated mechanically, which could increase prices of even simplest models. Some espresso machines make use of steam pressure instead of a pump to brew espresso. This can result in over-extraction because the boiler that makes steam also heats the water until it comes to a boil. In addition these machines are often required to rebuild their pressure between cups, which requires time and energy. Many espresso machines make use of the rotary or vibration pump. A vibration model utilizes a vibrating disk to generate pressure, whereas a rotating model pushes hot water through the ground at high speed. Both machines can produce excellent espresso, but rotary machines are more stable, quieter and less likely to break. The Boiler The boiler is the component that heats water to the ideal temperature for extraction. The resulting steam reaches the portafilter containing the ground espresso machine with frother (http://125.141.133.9:7001/bbs/board.php?Bo_table=free&wr_id=1277147) coffee and is then pumped into the cup. The steam creates enough pressure to push the grounds of the coffee through. This creates a crema on the top of the espresso. This is one of the main characteristics of a great espresso. There are three kinds of espresso makers. They differ in the kind of pump they use and the degree of heat that the brew is. There are many ways to control the strength of the brew and the size of cup that can be produced by the machine. The first espresso machines were steam-type. The first espresso machines were steam types. The coffee tasted bitter and burned. The modern espresso machine was invented by the Milanese producers Luigi Bezzerra & Desiderio Pavoni. The most commonly used espresso maker is a semiautomatic machine with an electric pump. These are the things people think of when they imagine an espresso machine. If you have a semi-automatic machine you need to grind the beans and tamp them yourself but the pump provides regulated water flow and pressure. This is a great compromise between the human touch and Espresso Machine with frother the mechanised quality. The Filter Espresso machines typically have filters that separate the grounds of the coffee from the hot water. The filter is also a vital element of the temperature control system, as it prevents the machine from overheating. It also helps with flavor, since a filter can allow for a longer bloom phase. This lets the beans release their flavors, and improves extraction. However, it is important to keep in mind that even a top filter can result in a poor cup of coffee, because the quality of the beans and extraction is crucial. It's here that the magic happens. This is the reason why espresso tastes so good. The grouphead (also called the brewhead) is where you place the portafilter, which is the thingy that you put the coffee grounds into, when making espresso. In a steam-driven espresso machine hot water is heated in an airtight container to create steam, which is then pushed through the grounds at high pressure. These kinds of machines are generally less expensive and simpler to maintain than pump-driven models. They are however limited to create the perfect conditions for brewing since they only 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 use an air compressor to push hot water into the grounds, and are far more portable than electric espresso maker steam-driven machines. |
