추천맛집 | Are You Tired Of Machine Espresso? 10 Inspirational Resources To Bring…
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작성자 Gilbert 작성일24-07-18 19:59관련링크
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How Does Machine Espresso Work?
Machine espresso makes use of precise pressure and mind-blowing filter technology to make the coffee we love. How exactly does it work?
Espresso is created by forcing hot water under pressure through finely ground coffee. The process is similar to making drip coffee. However, the pressure is the main 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 water into the portafilter, and controlling the pressure that results from the extraction. There are a variety of group heads each with their own advantages and drawbacks. Some are designed for the stability of temperature while some are built to handle pre-infusion. Others are built to control the lever. There are also some that contain a variety of features, like the E61 one, which is the standard choice for many baristas due to its ability to offer multiple benefits in one package.
As you can see in the above image the group head is made up of several notches to place your portafilter and then twist it manually to secure it. A gasket made of rubber is positioned inside the notches to help make a seal when you insert your portafilter. The notches permit the precise placement of the portafilter. This is vital for an accurate extraction.
Apart from allowing you easily place your portafilter in, the group head is also responsible for maintaining an even temperature. This is done by cycling hot water around the portafilter, and through the brew basin, ensuring that the temperature is always at the right level to extract the coffee. This is important, as even a few degrees can make the difference between a excellent and great espresso.
The Pump
In contrast to manual piston machines which use a lever to pressurize water, rotary espresso machines rely on motorized pumps to supply the nine atmospheric bars of pressure needed for espresso extraction. This pressure builds up by drawing tap water from a reservoir, and pumping it through a heat exchanger prior to being pumped through the ground coffee in the group head.
Pumps are typically more affordable and last longer than piston-driven machines. However, both kinds of machines may degrade due to excessive use and poor cleaning. They also make mechanically complex and can lead to costly prices for even the simplest models.
Some espresso machines employ steam pressure instead of a pump to make espresso. The drawback of this is that the boiler that produces steam also raises the temperature of water to boiling and can result in over-extraction. The machines also need to constantly rebuild their pressure in between cups. This requires energy and time.
Many espresso machines make use of a rotary or vibration pump. A vibration model uses an oscillating disk to create pressure, whereas a Rotary model pushes hot coffee through the ground at a high speed. Both machines can make excellent espresso, but rotary machines are more quiet, durable and less likely to break down.
The Boiler
The boiler is the element which heats the water to the optimal temperature to extract. The steam created gets to the portafilter which contains the espresso coffee grounds. It is then funneled into the cup. In this process, the steam creates pressure and pushes through the coffee grounds. This results in a crema on top of the espresso. This is a sign of a great espresso.
There are three types of espresso makers, and they differ in the type of pump they employ and how hot the espresso is. There are a variety of ways to control the amount of brew, as well as the size of cup that can be produced by the machine.
The first espresso machines were steam-type. They used a single boiler to make both steam and brew, however, the pressure they could produce was very low - just two bars of atmospheric pressure maximum. The coffee tasted bitter and burned. The modern espresso machine was designed by the Milanese manufacturers Luigi Bezzerra & Desiderio Pavoni.
The most commonly used espresso maker is a semi-automatic one with an electric pump. These are what people imagine when they think of an espresso maker. Semi-automatic machines require you to grind and tamp your beans yourself, but the pump regulates the flow of water and pressure. This is a perfect combination of human control and mechanised reliability.
The Filter
Typically, espresso machines employ a filter to separate out the grounds of coffee when they pass through the hot water. The filter is also an essential element of the machine's temperature control, since it stops overheating.
It also helps with flavor as a filter allows for a more prolonged bloom time. This allows beans to release their flavors and provides the chance for better extraction.
It is important to remember that even the finest filter could result in a poor cup of coffee. The quality of the beans as well as the extraction, remain vital.
This is where the magic happens, and it's what makes travel espresso maker taste great. The grouphead, sometimes called the brew head, is the place where the portafilter (the container you place the coffee ground into) is placed when you're making espresso.
In a steam-driven espresso machine hot water is heated in an airtight container to create steam. Steam then pushes the hot water through the grounds under high pressure. These types of machines are typically less expensive and simpler to maintain than pump-driven models. However, they are not as efficient in their capacity to create the perfect conditions for brewing, since they operate at 1-1.5 bars of pressure. While the perfect shot requires 9-10 bars.
In recent years, compressed air-driven espresso machines have been gaining popularity. They use an air compressor to push hot water into the grounds and are significantly more portable than steam-driven electric machines.
Machine espresso makes use of precise pressure and mind-blowing filter technology to make the coffee we love. How exactly does it work?
Espresso is created by forcing hot water under pressure through finely ground coffee. The process is similar to making drip coffee. However, the pressure is the main 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 water into the portafilter, and controlling the pressure that results from the extraction. There are a variety of group heads each with their own advantages and drawbacks. Some are designed for the stability of temperature while some are built to handle pre-infusion. Others are built to control the lever. There are also some that contain a variety of features, like the E61 one, which is the standard choice for many baristas due to its ability to offer multiple benefits in one package.
As you can see in the above image the group head is made up of several notches to place your portafilter and then twist it manually to secure it. A gasket made of rubber is positioned inside the notches to help make a seal when you insert your portafilter. The notches permit the precise placement of the portafilter. This is vital for an accurate extraction.
Apart from allowing you easily place your portafilter in, the group head is also responsible for maintaining an even temperature. This is done by cycling hot water around the portafilter, and through the brew basin, ensuring that the temperature is always at the right level to extract the coffee. This is important, as even a few degrees can make the difference between a excellent and great espresso.
The Pump
In contrast to manual piston machines which use a lever to pressurize water, rotary espresso machines rely on motorized pumps to supply the nine atmospheric bars of pressure needed for espresso extraction. This pressure builds up by drawing tap water from a reservoir, and pumping it through a heat exchanger prior to being pumped through the ground coffee in the group head.
Pumps are typically more affordable and last longer than piston-driven machines. However, both kinds of machines may degrade due to excessive use and poor cleaning. They also make mechanically complex and can lead to costly prices for even the simplest models.
Some espresso machines employ steam pressure instead of a pump to make espresso. The drawback of this is that the boiler that produces steam also raises the temperature of water to boiling and can result in over-extraction. The machines also need to constantly rebuild their pressure in between cups. This requires energy and time.
Many espresso machines make use of a rotary or vibration pump. A vibration model uses an oscillating disk to create pressure, whereas a Rotary model pushes hot coffee through the ground at a high speed. Both machines can make excellent espresso, but rotary machines are more quiet, durable and less likely to break down.
The Boiler
The boiler is the element which heats the water to the optimal temperature to extract. The steam created gets to the portafilter which contains the espresso coffee grounds. It is then funneled into the cup. In this process, the steam creates pressure and pushes through the coffee grounds. This results in a crema on top of the espresso. This is a sign of a great espresso.
There are three types of espresso makers, and they differ in the type of pump they employ and how hot the espresso is. There are a variety of ways to control the amount of brew, as well as the size of cup that can be produced by the machine.
The first espresso machines were steam-type. They used a single boiler to make both steam and brew, however, the pressure they could produce was very low - just two bars of atmospheric pressure maximum. The coffee tasted bitter and burned. The modern espresso machine was designed by the Milanese manufacturers Luigi Bezzerra & Desiderio Pavoni.
The most commonly used espresso maker is a semi-automatic one with an electric pump. These are what people imagine when they think of an espresso maker. Semi-automatic machines require you to grind and tamp your beans yourself, but the pump regulates the flow of water and pressure. This is a perfect combination of human control and mechanised reliability.
The Filter
Typically, espresso machines employ a filter to separate out the grounds of coffee when they pass through the hot water. The filter is also an essential element of the machine's temperature control, since it stops overheating.
It also helps with flavor as a filter allows for a more prolonged bloom time. This allows beans to release their flavors and provides the chance for better extraction.
It is important to remember that even the finest filter could result in a poor cup of coffee. The quality of the beans as well as the extraction, remain vital.
This is where the magic happens, and it's what makes travel espresso maker taste great. The grouphead, sometimes called the brew head, is the place where the portafilter (the container you place the coffee ground into) is placed when you're making espresso.
In a steam-driven espresso machine hot water is heated in an airtight container to create steam. Steam then pushes the hot water through the grounds under high pressure. These types of machines are typically less expensive and simpler to maintain than pump-driven models. However, they are not as efficient in their capacity to create the perfect conditions for brewing, since they operate at 1-1.5 bars of pressure. While the perfect shot requires 9-10 bars.
In recent years, compressed air-driven espresso machines have been gaining popularity. They use an air compressor to push hot water into the grounds and are significantly more portable than steam-driven electric machines.
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