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대략적인 공연예산: How Does Machine Espresso Work?
Machine espresso utilizes precise pressure and amazing filter technology to make the coffee we love. How exactly does it work?
Espresso is made by pushing hot water at high pressure through finely ground coffee. The process is similar to making drip coffee but the major difference is in the pressure.
The Head of the Group
As the name implies, the group head is the place you put your portafilter in when making espresso. It is responsible for dispersing water into the portafilter before controlling the pressure that results from the extraction. There are many different types of group heads, each with its own advantages and drawbacks. Some are focused on temperature stability, some on pre-infusion capabilities, while others are designed to control the lever. Some are a combination, such as the E61. This is a very popular choice for baristas due to the fact that it has multiple benefits in a single package.
As you can see from the picture above the group head has a number of notches. You place your portafilter in these notches and then twist the head to lock it. A gasket of rubber is situated within the notches to create a seal as you insert your portafilter. The notches on the head allow for a precise placement of the portafilter, which is crucial to ensure an even extraction.
Aside from allowing you to effortlessly insert your portafilter the group head is responsible to maintain an even temperature. This is done by cycling hot water around the portafilter and through the brew-basket to ensure that the temperature is at the right level for extraction. This is important, as even a few degrees can be the difference between a excellent and great espresso.
The Pump
The motorized pumps in rotary espresso machines provide the nine atmospheric bar pressure that is required for espresso extraction. This is different from manual piston machines that use levers. This pressure is generated by pumping water through a heat-exchanger and then through the ground coffee.
Pumps tend to be cheaper than piston-driven machines and tend to last longer. However, both types of machines can be damaged by excessive use and inadequate cleaning. Pumps are also more complicated mechanically, which can increase the cost of even most basic models.
Some espresso machines remove the pump completely and instead utilize steam pressure to make espresso. The drawback of this is that the same boiler that produces steam also raises the temperature of water to the point of boiling which can cause excessive extraction. Additionally, these machines frequently have to restore their pressure between cups, which takes time and energy.
Many espresso machines use either a vibration or rotary pump. A vibration model uses the vibrating disk to create pressure, while a rotating model pushes hot water through the ground at a rapid speed. Both types of machine can make excellent espresso, but Rotary machines are quieter and more durable than vibration pumps.
The Boiler
The boiler heats the water to the perfect temperature to extract. The steam that is produced gets to the portafilter which is a container for espresso grounds. It is then funneled into the cup. The steam generates enough pressure to push the coffee grounds through. This results in a crema on top of the espresso. This is one of the hallmarks of a great espresso.
There are three kinds of espresso machines, each with different types of pumps and the temperature of the brew. There are many ways to control the brew and the size of cup that can be made by the machine.
The first espresso machines were steam-type. The earliest espresso machines were steam types. The coffee tasted bitter and burned. This is the reason Milanese producers Luigi Bezzerra and Desiderio Pavoni developed the modern espresso machine.
The most common espresso machine is a semiautomatic that has an electric pump. This is what people envision when they think of an espresso maker. Semi-automatic machines require you to grind and tamp the beans on your own while the pump controls the water flow and pressure. This is an excellent solution that combines human control with mechanized reliability.
The Filter
Espresso machines usually use filters that separate the grounds of coffee from hot water. The filter is also a vital element of the machine's temperature control, since it stops overheating.
It also helps with flavor as a filter can allow for a longer bloom time. This lets the beans release their nuances, and improves 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, are still very important.
This is where the magic happens, it's the thing that makes an espresso really taste great. The grouphead, often called the brewhead, is where the portafilter (the device you put the coffee grounds into) is placed when making mini espresso maker.
In an espresso maker for home machine that is driven by steam, hot water is heated in an airtight tank to create steam, which is then pushed through the grounds under high pressure. These machines are cheaper 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 operate with 1-1.5 bar of pressure. The ideal shot requires 9-10 bars.
In recent years, compressed-air-pump-driven espresso machines have been gaining popularity. They utilize an air compressor to force the hot water through the grounds and are significantly more portable than steam-driven electric machines.
Machine espresso utilizes precise pressure and amazing filter technology to make the coffee we love. How exactly does it work?
Espresso is made by pushing hot water at high pressure through finely ground coffee. The process is similar to making drip coffee but the major difference is in the pressure.
The Head of the Group
As the name implies, the group head is the place you put your portafilter in when making espresso. It is responsible for dispersing water into the portafilter before controlling the pressure that results from the extraction. There are many different types of group heads, each with its own advantages and drawbacks. Some are focused on temperature stability, some on pre-infusion capabilities, while others are designed to control the lever. Some are a combination, such as the E61. This is a very popular choice for baristas due to the fact that it has multiple benefits in a single package.
As you can see from the picture above the group head has a number of notches. You place your portafilter in these notches and then twist the head to lock it. A gasket of rubber is situated within the notches to create a seal as you insert your portafilter. The notches on the head allow for a precise placement of the portafilter, which is crucial to ensure an even extraction.
Aside from allowing you to effortlessly insert your portafilter the group head is responsible to maintain an even temperature. This is done by cycling hot water around the portafilter and through the brew-basket to ensure that the temperature is at the right level for extraction. This is important, as even a few degrees can be the difference between a excellent and great espresso.
The Pump
The motorized pumps in rotary espresso machines provide the nine atmospheric bar pressure that is required for espresso extraction. This is different from manual piston machines that use levers. This pressure is generated by pumping water through a heat-exchanger and then through the ground coffee.
Pumps tend to be cheaper than piston-driven machines and tend to last longer. However, both types of machines can be damaged by excessive use and inadequate cleaning. Pumps are also more complicated mechanically, which can increase the cost of even most basic models.
Some espresso machines remove the pump completely and instead utilize steam pressure to make espresso. The drawback of this is that the same boiler that produces steam also raises the temperature of water to the point of boiling which can cause excessive extraction. Additionally, these machines frequently have to restore their pressure between cups, which takes time and energy.
Many espresso machines use either a vibration or rotary pump. A vibration model uses the vibrating disk to create pressure, while a rotating model pushes hot water through the ground at a rapid speed. Both types of machine can make excellent espresso, but Rotary machines are quieter and more durable than vibration pumps.
The Boiler
The boiler heats the water to the perfect temperature to extract. The steam that is produced gets to the portafilter which is a container for espresso grounds. It is then funneled into the cup. The steam generates enough pressure to push the coffee grounds through. This results in a crema on top of the espresso. This is one of the hallmarks of a great espresso.
There are three kinds of espresso machines, each with different types of pumps and the temperature of the brew. There are many ways to control the brew and the size of cup that can be made by the machine.
The first espresso machines were steam-type. The earliest espresso machines were steam types. The coffee tasted bitter and burned. This is the reason Milanese producers Luigi Bezzerra and Desiderio Pavoni developed the modern espresso machine.
The most common espresso machine is a semiautomatic that has an electric pump. This is what people envision when they think of an espresso maker. Semi-automatic machines require you to grind and tamp the beans on your own while the pump controls the water flow and pressure. This is an excellent solution that combines human control with mechanized reliability.
The Filter
Espresso machines usually use filters that separate the grounds of coffee from hot water. The filter is also a vital element of the machine's temperature control, since it stops overheating.
It also helps with flavor as a filter can allow for a longer bloom time. This lets the beans release their nuances, and improves 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, are still very important.
This is where the magic happens, it's the thing that makes an espresso really taste great. The grouphead, often called the brewhead, is where the portafilter (the device you put the coffee grounds into) is placed when making mini espresso maker.
In an espresso maker for home machine that is driven by steam, hot water is heated in an airtight tank to create steam, which is then pushed through the grounds under high pressure. These machines are cheaper 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 operate with 1-1.5 bar of pressure. The ideal shot requires 9-10 bars.
In recent years, compressed-air-pump-driven espresso machines have been gaining popularity. They utilize an air compressor to force the hot water through the grounds and are significantly more portable than steam-driven electric machines.
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