Coffee grinder Propeller grinder

There are different brands and models of bean grinder, and the grinder which can adjust the thickness of grinding bean is ideal. When grinding with a bean grinder, don't grind too much at one time, just enough for one use. Because the longer the bean grinder is used at one time, the easier it is to heat up, which indirectly causes the coffee beans to be heated and leads to the loss of aroma, thus affecting the aroma of the coffee.

This kind of bean grinder uses a motor to turn a propeller blade to grind coffee beans into powder. Coffee beans will be chopped to pieces and a lot of flavor will be lost. Therefore, this kind of propeller bean grinder is not commonly used. However, because it is cheap, small and does not take up space, some homes and offices still use it frequently. The propeller bean grinder mainly has the following disadvantages:

1. High temperature is formed during grinding.

Compared with other bean grinders, this kind of bean grinder has the fastest speed and is easy to form high temperature after high-speed friction with coffee beans. However, the boiling point of aromatic substances is very low, so the aroma of coffee will be lost in the high temperature of the grinding process, thus discoloring the coffee.

2. Uneven grinding

This kind of grinding opportunity will cut the coffee beans randomly, and the powder formed is either too thick or too fine (too fine coffee powder will produce bitterness), which is difficult to be uniform. Especially in a large number of grinding, often floating on the top of the beans, easy to produce too thick coffee grains. This tends to form a random distribution, with a high proportion of too fine and too coarse powder particles.

In order to overcome this disadvantage, a small amount of grinding can be used, and hold the bean grinder by hand, and shake the lid up and down with your thumb, so that the blade can be cut evenly to the coffee grains.

3. Form a block

When grinding beans, the high-speed spiral blade will make the coffee powder form a whirlpool, but because the centrifugal force is too large, it will make the ultra-fine powder form lumps and stick around, which will prevent hot water from soaking coffee averagely, resulting in uneven extraction.

4. The degree of grinding cannot be set.

This kind of bean grinder does not have the function of setting the grinding degree, so it can only be determined according to the grinding time. The general grinding time is about 6-10 seconds, which is suitable for filter kettles, follicular cups and air stoppers. However, espresso requires very fine grinding, which may take more than 20 seconds, when the friction temperature will continue to evaporate the aroma of the coffee.

5. Dangerous switch design

In design, this kind of grinder usually uses the pressure of closing the lid to start the switch and rotate the spiral blade. When putting beans or cleaning, if you accidentally press the switch and the finger is right near the blade, the consequences will be unimaginable. It is suggested that the plug should be unplugged at ordinary times, then plugged in before grinding the beans, and unplugged immediately after use; when handling and cleaning, the power supply should also be cut off. In addition, the plastic lid above can be cleaned with water, but the inside and outside of the fuselage can not be stained with water, can only be wiped with a dishcloth.