Working principle of coffee grinder-working principle of automatic coffee machine

Working principle of coffee grinder-working principle of automatic coffee machine

1, the uniformity of grinding: uniformity is the most important thing to judge the quality of the grinder, uneven grinding will cause uneven extraction, often some parts of coffee powder have not been fully extracted, but some parts have been over-extracted. finally, the whole cup of coffee has a bad smell. One of the most common problems is that fine powder will be produced during rough grinding, resulting in bitter coffee. Although there will be fine powder phenomenon in even the best grinder, the phenomenon of fine powder in some low-end bean grinders will be especially obvious.

2. Heat generated during grinding: the aromatic substances in coffee powder are very easy to volatilize, and the heat during grinding will accelerate this volatilization. A good grinder can control the heat within a certain range by reasonable torque. However, if people drink their own coffee at home, they only grind a small amount of beans, and the effect of fever is negligible.

3. Grinding speed: needless to say, the more time-saving and labor-saving, the better. However, it should be noted that some low-end grinders simply increase the speed to improve efficiency, which will cause a large amount of heat as mentioned in the second point. A good bean grinder generally achieves the balance of heat production and efficiency through low speed and high torque.

From another point of view, if it is necessary to get relatively uniform particles, sifting the ground coffee is also an economical and practical way. In addition, the speed of the motor will become unstable due to the interference of current and many other external factors. It doesn't seem so reliable to rely entirely on a bean grinder to control the particle size. Of course, it is mainly not economical enough!

At present, the quantitative system uses time as the counting unit to convert weight. Therefore, even the legendary most accurate mythos one also has some errors. After all, variables are still variables. Powder quantity control, but also rely on the table to calibrate. When the quantitative function is not so reliable, is there any reason for us to buy a quantitative mill? In my opinion, whether the design of the pulverizing channel is reasonable, the loose degree of pulverizing, electrostatic treatment and other functions will be the buyer's secondary demand.