How Does machine cafe espresso machine, http://0522565551.ussoft.kr/, Work?

Machine espresso employs precise pressure and mind-blowing filter technology to make the coffee we love. But how exactly does it work?

Espresso is made by forcing hot water under high pressure through finely-ground coffee. The process is similar to making drip coffee. However, the pressure is the primary difference.

The Head of the Group

As the name implies the group head is where you place your portafilter when making espresso. It disperses the water into the portafilter and regulates the pressure during the extraction. There are many different types of group heads, each with its own advantages and disadvantages. Some are designed for stability of temperature while others are built to handle pre-infusion. Others are built to control the lever. There are also some that come with a range of features, such as the E61 one, which is the standard choice for many baristas because of its ability to offer multiple benefits in one package.

As you can see from the photo above the head of the group is fitted with several notches. You place your portafilter in these notches, then twist the head to lock it. There is also a rubber gasket in the notches and helps to create an airtight seal when you insert your portafilter into the machine. The notches allow for precise placement of the portafilter. This is vital for an even extraction.

The group head is not just able to allow you to place your portafilter easily, but it also maintains the temperature at a constant level. This is achieved by cycling hot water around the portafilter and through the brew basin, ensuring the temperature is always right for extraction. This is important, as just a few degrees could make the difference between good and great espresso.

The Pump

Contrary to manual piston machines which rely on a lever that pressurize water, the rotary italian espresso machine machines use motorized pumps to supply the nine atmospheric bars of pressure necessary for espresso extraction. 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 could be damaged by excessive use and inadequate cleaning. Pumps are also more complex mechanically, which can raise the price of even the most basic models.

Some espresso machines eliminate the pump completely and employ steam pressure to create espresso. The disadvantage of this is that the boiler that produces steam also raises the temperature of water until it reaches boiling, which can lead to over-extraction. Additionally these machines typically have to rebuild their pressure between cups, which requires time and energy.

Many espresso machines employ the rotary or vibration pump, which has a vibration model using a vibrating disc that generates the pressure and the rotary model pushing hot water through the grounds under high speed. Both types of machine can make excellent espresso, but the rotary models are quieter and more durable than vibration pumps.

The Boiler

The boiler is what is used to heat the water to the perfect temperature for extraction. The steam created will eventually reach the portafilter, Machine Espresso which holds the espresso grounds. It is then funneled into the cup. During this process the steam causes enough pressure to push the grounds of the coffee through. This results in a whipped-up top of the espresso. This is one of the main characteristics of a great espresso.

There are three distinct types of espresso machines, each having different pumps and the temperature of the brew. There are various 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. The earliest espresso machines were steam types. The coffee tasted bitter and burnt. The modern espresso machine was developed by the Milanese producers Luigi Bezzerra & Desiderio Pavoni.

The most well-known espresso maker is a semi-automatic one with an electric pump. These are the things people think of when they imagine an espresso machine. With a semi-automatic machine, you grind the beans and tamp them yourself but the pump controls the flow of water and pressure. This is a great compromise between the human touch and the mechanized quality.

The Filter

Espresso machines typically use a filter that separates the grounds of the coffee from the hot water. The filter is also a crucial component of the temperature control system as it prevents the machine from overheating.

It also helps with flavor, as it lets you enjoy a longer bloom time. This allows the beans to release their nuances, and also allows for Machine Espresso better extraction.

However it is crucial to remember that even a great filter can result in a poor cup of coffee as the quality of the beans and extraction are crucial.

This is where the magic happens, and it's what makes espresso taste good. The grouphead (also called the brewhead) is where you put the portafilter - the thingy which you put the coffee grounds in, while making espresso.

In an espresso machine that is driven by steam, hot water is heated in an airtight tank to create steam. Steam is then pushed through the grounds at a high pressure. These kinds of machines tend to be less expensive and simpler to maintain than pump-driven models. However, they are not as efficient in their ability to provide the ideal brewing conditions, because they operate at 1-1.5 bars of pressure. While the perfect shot requires 9-10 bars.