Extraction principle of coffee machine
The extraction principle of the coffee machine is to use high temperature and high pressure water through the coffee powder to dissolve the aroma, oil and caffeine in the coffee to form espresso. An extraction needs to use a certain amount of coffee powder and water, under normal circumstances, the common extraction number is 1-2 times.
Why limit the extraction times?
1. Guarantee the quality of coffee
Multiple extraction will lead to the gradual depletion of oil and caffeine in coffee, coffee taste will become bitter, weak, sour, etc., and this change is gradually aggravated with the increase of extraction times, ultimately affecting the taste and quality of coffee. Therefore, in order to ensure the stability of coffee quality, coffee machines are generally designed to limit the number of extraction times.
2. Protect the coffee machine
Excessive extraction will lead to the accumulation of coffee powder in the nozzle, and eventually lead to unstable pressure and water flow in the coffee machine, reducing the service life of the coffee machine. At the same time, excessive extraction may also lead to oxidation and corrosion of the internal parts of the coffee machine, accelerating the aging of the coffee machine. Therefore, limiting the number of extractions can also protect the service life of the coffee machine.
How does the coffee machine limit the number of extractions?
Coffee machines are usually controlled by software or hardware to limit the number of extractions. In general, the coffee machine is designed to set an upper limit of the maximum number of extraction times, and when this upper limit is reached, the coffee machine automatically stops the extraction function. Some high-end coffee machines even display information such as extraction times and remaining times on the display screen, which is easy for users to understand and control.
Limiting extraction times is an important measure to ensure coffee quality and coffee machine service life. For ordinary consumers, when using the coffee machine, attention should be paid to the limit of the number of extraction times to ensure the coffee taste and the service life of the coffee machine.
