What's the difference between a coffee grinder and a flat knife? which brand of coffee grinder is better?

What's the difference between a coffee grinder and a flat knife? which brand of coffee grinder is better?

Advantages and disadvantages of cone knife:

The conical knife grinder places a conical cutter head at the bottom, and then grinds it with the outer ring cutter head. After the coffee bean falls from above, it will pull the coffee bean down with the rotation of the conical cutter head, and then produce grinding action. Because of the relationship from top to bottom, the particles can push the coffee out without pushing. Compared with the peace knife grinder, the number of collisions between the particles will be reduced a lot. Therefore, the proportion of fine powder produced by the cone knife will be much less than that of the flat knife, and the uniformity of coffee grinding will be greatly improved. The cone knife grinding particles will be close to granules, resulting in longer water absorption path of coffee particles and longer internal contact with water, so the cone knife particles will release less soluble matter at the initial stage, resulting in a low concentration in a short period of time. At the same time, because the shape is granular, even if extracted for a long time, the xylem absorbs less water and is less likely to produce miscellaneous and astringent taste.

The Italian bean grinder is divided into a cone knife and a flat knife.

The cone knife type bean grinder is longitudinal grinding from top to bottom, with a long path, and its advantage is that it can use lower rotational speed to achieve a better grinding effect, and produces less heat energy, can retain more aroma of coffee powder, and the demon's thickness is more uniform, so that the flavor is clearer, but the price is also much more expensive.

The flat knife type bean grinder is ground in a horizontal way, and the grinding path is shorter and the speed is higher. High-speed grinding will produce more heat energy and fine powder, which has a great influence on the flavor of coffee powder.

Therefore, the size of the cutter head of the high-end Italian coffee machine is also larger, and it can grind more coffee beans at one time, so as to increase the grinding efficiency and avoid the opportunity of producing heat energy at high speed.