Nine Things That Your Parent Taught You About Machine Espresso
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작성자 Layne Blacklock 작성일 25-01-23 07:21 조회 4 댓글 0본문
How Does Machine Espresso Work?
Machine espresso makes use of precise pressure and mind-blowing filter technology to make the coffee we love. How does it work exactly?
Espresso is created by forcing hot water under high pressure through finely-ground coffee. The process is similar to making drip coffee but the difference is in the pressure.
The Group Head
The name implies, the group head is the place you place your portafilter when making espresso. It distributes water into the portafilter, and then controls the pressure of the extraction. There are numerous kinds of group heads each with its own advantages and drawbacks. Some are focused on temperature stability, others on pre-infusion options, and others are designed to control the lever. Some have a combination, like the E61. This is a preferred choice for baristas as it provides a variety of advantages in a single package.
As you can see in the photo above, the group head has numerous notches that you can place your portafilter and twist it with your hands to secure it. There is also a gasket made from rubber that resides inside the notches and helps create a seal when you insert your portafilter into the machine. The notches on the head permit an exact location of the portafilter which is necessary to ensure an even extraction.
The group head is not just able to allow you to place your portafilter easily however it also keeps the temperature at a constant level. This is accomplished by cycling hot water around the portafilter and through the brew-basket, making sure the temperature is always right to extract the coffee. This is crucial, since even a few degrees can mean the difference between excellent and great espresso.
The Pump
Contrary to manual piston machines which rely on a lever to pressurize water, rotary espresso machines rely on motorized pumps to supply the nine atmospheric bars of pressure that are required to extract compact espresso machine. 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 could get damaged through overuse and lack of cleaning. Pumps are also more complex mechanically, which can increase the price of even the simplest models.
Some espresso machines remove the pump completely and use steam pressure to brew espresso. The drawback of this is that the boiler that produces steam also increases the temperature of water until it reaches boiling which can cause over-extraction. The machines also need to continually rebuild their pressure between cups. This takes energy and time.
A majority of espresso machines utilize the rotary or vibration pump. A vibration model makes use of a vibrating disk to generate pressure, while a rotary model pushes hot water through the ground at high speed. Both types of machines can produce an excellent espresso, however rotary machines are quieter and more durable than vibration pumps.
The Boiler
The boiler is the one that will heat the water to the perfect temperature for extraction. The steam that is created gets to the portafilter which contains the espresso coffee grounds. The steam is then channeled into the cup. The steam creates pressure that pushes through the grounds of the coffee. This produces a layer of crema on top. This is one of the hallmarks of a good espresso.
There are three types 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 brew and the size of cup that can be produced by the machine.
The earliest espresso machines were steam-based. They utilized a single boiler to make both brew and steam, however, the pressure they could produce was not very high - two bars of atmospheric pressure at most. The coffee tasted bitter and burnt. The modern espresso machine was developed by the Milanese producers Luigi Bezzerra & Desiderio Pavoni.
The most popular retro espresso maker machine is a semiautomatic one with an electric pump. When people think of espresso machine with frother machines, they imagine these machines. Semi-automatic machines require you to grind and tamp the beans by yourself The pump, however, regulates the flow of water and pressure. This is an excellent compromise between human touch and mechanized quality.
The Filter
Espresso machines typically use filters that separate the coffee grounds from the hot water. The filter is also an essential element of the machine's temperature control, as it prevents overheating.
A filter can also help with flavor, as it permits the beans to flower for a longer period of time. This lets the beans release their flavor and also allows for better extraction.
It is important to keep in mind that even the best filter can produce a bad cup of coffee. The quality of the beans, and the extraction process are still crucial.
This is where the magic happens, it's what makes espresso taste great. The grouphead (also called the brewhead) is where you put the portafilter, the device that you use to put the coffee grounds into, when making espresso.
Steam-driven espresso machines make use of hot water that is heated in an airtight container to make steam. The steam then pushes hot water through the grounds of the coffee under pressure. They are less expensive and easier for the owner to maintain than pumps-driven models. They are however limited in their ability to create the perfect conditions for brewing as they only operate with 1-1.5 bar of pressure. The ideal shot requires 9-10 bars.
In recent years, compressed air-driven espresso machines have become more popular. They make use of an air compressor to push hot water across the ground and are much more mobile than steam-driven electric espresso machines.
Machine espresso makes use of precise pressure and mind-blowing filter technology to make the coffee we love. How does it work exactly?
Espresso is created by forcing hot water under high pressure through finely-ground coffee. The process is similar to making drip coffee but the difference is in the pressure.
The Group Head
The name implies, the group head is the place you place your portafilter when making espresso. It distributes water into the portafilter, and then controls the pressure of the extraction. There are numerous kinds of group heads each with its own advantages and drawbacks. Some are focused on temperature stability, others on pre-infusion options, and others are designed to control the lever. Some have a combination, like the E61. This is a preferred choice for baristas as it provides a variety of advantages in a single package.
As you can see in the photo above, the group head has numerous notches that you can place your portafilter and twist it with your hands to secure it. There is also a gasket made from rubber that resides inside the notches and helps create a seal when you insert your portafilter into the machine. The notches on the head permit an exact location of the portafilter which is necessary to ensure an even extraction.
The group head is not just able to allow you to place your portafilter easily however it also keeps the temperature at a constant level. This is accomplished by cycling hot water around the portafilter and through the brew-basket, making sure the temperature is always right to extract the coffee. This is crucial, since even a few degrees can mean the difference between excellent and great espresso.
The Pump
Contrary to manual piston machines which rely on a lever to pressurize water, rotary espresso machines rely on motorized pumps to supply the nine atmospheric bars of pressure that are required to extract compact espresso machine. 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 could get damaged through overuse and lack of cleaning. Pumps are also more complex mechanically, which can increase the price of even the simplest models.
Some espresso machines remove the pump completely and use steam pressure to brew espresso. The drawback of this is that the boiler that produces steam also increases the temperature of water until it reaches boiling which can cause over-extraction. The machines also need to continually rebuild their pressure between cups. This takes energy and time.
A majority of espresso machines utilize the rotary or vibration pump. A vibration model makes use of a vibrating disk to generate pressure, while a rotary model pushes hot water through the ground at high speed. Both types of machines can produce an excellent espresso, however rotary machines are quieter and more durable than vibration pumps.
The Boiler
The boiler is the one that will heat the water to the perfect temperature for extraction. The steam that is created gets to the portafilter which contains the espresso coffee grounds. The steam is then channeled into the cup. The steam creates pressure that pushes through the grounds of the coffee. This produces a layer of crema on top. This is one of the hallmarks of a good espresso.
There are three types 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 brew and the size of cup that can be produced by the machine.
The earliest espresso machines were steam-based. They utilized a single boiler to make both brew and steam, however, the pressure they could produce was not very high - two bars of atmospheric pressure at most. The coffee tasted bitter and burnt. The modern espresso machine was developed by the Milanese producers Luigi Bezzerra & Desiderio Pavoni.
The most popular retro espresso maker machine is a semiautomatic one with an electric pump. When people think of espresso machine with frother machines, they imagine these machines. Semi-automatic machines require you to grind and tamp the beans by yourself The pump, however, regulates the flow of water and pressure. This is an excellent compromise between human touch and mechanized quality.
The Filter
Espresso machines typically use filters that separate the coffee grounds from the hot water. The filter is also an essential element of the machine's temperature control, as it prevents overheating.
A filter can also help with flavor, as it permits the beans to flower for a longer period of time. This lets the beans release their flavor and also allows for better extraction.
It is important to keep in mind that even the best filter can produce a bad cup of coffee. The quality of the beans, and the extraction process are still crucial.
This is where the magic happens, it's what makes espresso taste great. The grouphead (also called the brewhead) is where you put the portafilter, the device that you use to put the coffee grounds into, when making espresso.
Steam-driven espresso machines make use of hot water that is heated in an airtight container to make steam. The steam then pushes hot water through the grounds of the coffee under pressure. They are less expensive and easier for the owner to maintain than pumps-driven models. They are however limited in their ability to create the perfect conditions for brewing as they only operate with 1-1.5 bar of pressure. The ideal shot requires 9-10 bars.
In recent years, compressed air-driven espresso machines have become more popular. They make use of an air compressor to push hot water across the ground and are much more mobile than steam-driven electric espresso machines.
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