작성일: 24-07-17 19:04
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Renate Carlin
대략적인 공연예산: How Does Machine Espresso Work?
Machine espresso employs precise pressure and mind-blowing filter technology to make the coffee we love. What exactly is it that makes it work?
To make espresso hot water is pushed under pressure through finely ground coffee. The process is similar to making drip coffee. However, it is the pressure that makes the main difference.
The Group Head
As the name implies the group head is the place you insert your portafilter when brewing espresso. It disperses the water into the portafilter, and then regulates the pressure of the extraction. There are a variety of group heads, each with its own advantages and disadvantages. Some focus on temperature stability, some on pre-infusion capabilities, while others are designed to control the lever. Some have a combination, like the E61. This is a popular choice among baristas due to the fact that it has multiple advantages in a single package.
As you can see from the picture above, the group head is equipped with several notches. It is possible to place your portafilter in these notches and then twist the head to lock it. A gasket of rubber is situated in the notches to make a seal when you insert your portafilter. The notches on the head allow for a precise position of the portafilter which is essential to ensure an efficient extraction.
Aside from allowing you to easily connect your portafilter, the group head is also responsible for maintaining a consistent 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 vital, because even a small difference in temperature can make the difference between good and great espresso.
The Pump
In contrast to manual piston machines that use a lever to pressurize water, rotary espresso machines rely on motorized pumps that provide the nine atmospheric bars of pressure that are required for espresso extraction. The pressure is created 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. However, both types of machines may degrade with overuse and insufficient cleaning. They also create mechanical complexity and can lead to a high price tag on even the simplest models.
Certain espresso machines can eliminate the pump completely and make use of steam pressure to make espresso. The downside is that the same boiler that produces steam also raises the temperature of the water to boiling which could lead to over-extraction. They also have to continually rebuild their pressure between cups. This takes energy and time.
A majority of espresso machines utilize a rotary or vibration pump. A vibration model utilizes the vibrating disk to create pressure, whereas a Rotary model pushes hot coffee through the ground at a rapid speed. Both models can make a great espresso, however Rotary machines are quieter and more durable than vibration pumps.
The Boiler
The boiler is the part which heats the water to the ideal temperature to extract. The steam that is produced reaches the portafilter which holds the ground espresso coffee and gets funnelled down into the cup. During this process the steam creates enough pressure to push the grounds of the coffee through. This creates a layer crema that is then poured over. This is the hallmark of a good espresso.
There are three kinds of decent espresso machine makers. They differ in the kind of pump they use and the degree of heat that the coffee is. There are many ways to control the brew as well as the size of cup that can be made by the machine.
The first espresso machines were steam types. The earliest espresso machines were steam types. The coffee tasted bitter and burnt. The modern espresso machine was invented by the Milanese producers Luigi Bezzerra & Desiderio Pavoni.
The most commonly used espresso maker is a semiautomatic machine that has an electric pump. These are the things people think of when they imagine an espresso machine. With a semi-automatic machine you must grind the beans and tamp them by hand, but the pump is able to regulate the flow of water and pressure. This is a perfect combination of human control and mechanized reliability.
The Filter
Espresso machines typically have filters that separate the grounds of coffee from hot water. The filter is also a vital component of the machine's temperature control, since it stops overheating.
A filter can also help with flavor, as it permits a longer flowering period. This allows beans to release their nuances and gives an opportunity for better extraction.
It is important to remember that even the finest filter can result in a bad cup of coffee. The quality of the beans and the extraction process remain crucial.
It's here that the magic happens. This is the reason why espresso tastes so good. The grouphead, often called the brew head, is where the portafilter (the device you put the coffee ground into) is placed when you're making Cafe espresso machine.
In an espresso machine that is driven by steam, hot water is heated in an airtight tank to create steam. Steam then pushes the hot water through the grounds with high pressure. They are less expensive and are easier for the user to maintain than pumps-driven models. They are however limited in their ability to create the ideal conditions for brewing, as they operate with 1-1.5 bar of pressure. The ideal shot requires 9-10 bars.
In recent years, espresso machines powered by compressed air-pump have become increasingly popular. They use an air compressor to force the hot water through the grounds, and are far more portable than electric steam-driven machines.
Machine espresso employs precise pressure and mind-blowing filter technology to make the coffee we love. What exactly is it that makes it work?
To make espresso hot water is pushed under pressure through finely ground coffee. The process is similar to making drip coffee. However, it is the pressure that makes the main difference.The Group Head
As the name implies the group head is the place you insert your portafilter when brewing espresso. It disperses the water into the portafilter, and then regulates the pressure of the extraction. There are a variety of group heads, each with its own advantages and disadvantages. Some focus on temperature stability, some on pre-infusion capabilities, while others are designed to control the lever. Some have a combination, like the E61. This is a popular choice among baristas due to the fact that it has multiple advantages in a single package.
As you can see from the picture above, the group head is equipped with several notches. It is possible to place your portafilter in these notches and then twist the head to lock it. A gasket of rubber is situated in the notches to make a seal when you insert your portafilter. The notches on the head allow for a precise position of the portafilter which is essential to ensure an efficient extraction.
Aside from allowing you to easily connect your portafilter, the group head is also responsible for maintaining a consistent 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 vital, because even a small difference in temperature can make the difference between good and great espresso.
The Pump
In contrast to manual piston machines that use a lever to pressurize water, rotary espresso machines rely on motorized pumps that provide the nine atmospheric bars of pressure that are required for espresso extraction. The pressure is created 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. However, both types of machines may degrade with overuse and insufficient cleaning. They also create mechanical complexity and can lead to a high price tag on even the simplest models.
Certain espresso machines can eliminate the pump completely and make use of steam pressure to make espresso. The downside is that the same boiler that produces steam also raises the temperature of the water to boiling which could lead to over-extraction. They also have to continually rebuild their pressure between cups. This takes energy and time.
A majority of espresso machines utilize a rotary or vibration pump. A vibration model utilizes the vibrating disk to create pressure, whereas a Rotary model pushes hot coffee through the ground at a rapid speed. Both models can make a great espresso, however Rotary machines are quieter and more durable than vibration pumps.
The Boiler
The boiler is the part which heats the water to the ideal temperature to extract. The steam that is produced reaches the portafilter which holds the ground espresso coffee and gets funnelled down into the cup. During this process the steam creates enough pressure to push the grounds of the coffee through. This creates a layer crema that is then poured over. This is the hallmark of a good espresso.
There are three kinds of decent espresso machine makers. They differ in the kind of pump they use and the degree of heat that the coffee is. There are many ways to control the brew as well as the size of cup that can be made by the machine.
The first espresso machines were steam types. The earliest espresso machines were steam types. The coffee tasted bitter and burnt. The modern espresso machine was invented by the Milanese producers Luigi Bezzerra & Desiderio Pavoni.
The most commonly used espresso maker is a semiautomatic machine that has an electric pump. These are the things people think of when they imagine an espresso machine. With a semi-automatic machine you must grind the beans and tamp them by hand, but the pump is able to regulate the flow of water and pressure. This is a perfect combination of human control and mechanized reliability.
The Filter
Espresso machines typically have filters that separate the grounds of coffee from hot water. The filter is also a vital component of the machine's temperature control, since it stops overheating.
A filter can also help with flavor, as it permits a longer flowering period. This allows beans to release their nuances and gives an opportunity for better extraction.
It is important to remember that even the finest filter can result in a bad cup of coffee. The quality of the beans and the extraction process remain crucial.
It's here that the magic happens. This is the reason why espresso tastes so good. The grouphead, often called the brew head, is where the portafilter (the device you put the coffee ground into) is placed when you're making Cafe espresso machine.
In an espresso machine that is driven by steam, hot water is heated in an airtight tank to create steam. Steam then pushes the hot water through the grounds with high pressure. They are less expensive and are easier for the user to maintain than pumps-driven models. They are however limited in their ability to create the ideal conditions for brewing, as they operate with 1-1.5 bar of pressure. The ideal shot requires 9-10 bars.
In recent years, espresso machines powered by compressed air-pump have become increasingly popular. They use an air compressor to force the hot water through the grounds, and are far more portable than electric steam-driven machines.
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