Choice of coffee grinder: don't let the heat take away the aroma of coffee

Today we will go on to talk about the second of the four elements of coffee grinding: the choice of coffee grinder.

We all know that the problem of friction heat will inevitably occur when using a coffee grinder to grind coffee. It is normal to produce heat during grinding, whether it is coffee or wheat. The reason to pay attention to this is because calories obviously damage the taste and aroma of coffee. Therefore, it is also very important to choose a suitable bean grinder.

Much attention has been paid to the fact that coffee generates calories when it is ground. Experts believe that under very common speed and load conditions, the instantaneous high temperature caused by friction in the local area of the metal surface can reach 500 to 1000 degrees.

It is inevitable that heat will be produced when grinding coffee, but the heat will vary according to the mechanism of grinding beans.

Bean grinders grind coffee beans in two ways: one is to grind coffee beans with two disc blades engraved with grooves. This kind of bean grinder is called grinder. Most manual bean grinders fall into this category. The other is represented by a shredder, with two sets of rollers with sharp blades perpendicular to each other to cut coffee beans. This method is called a cutting bean grinder. The common electric bean grinder is this kind.

Many people generally believe that slow grinding with a manual bean grinder will not generate heat. In fact, on the contrary, the type of friction with a disc blade is easy to generate heat. On the other hand, the cutting bean grinder can minimize the friction heat produced by grinding coffee powder. Because the way of crushing and grinding is bound to produce friction heat, while chopped beans by cutting will produce almost no heat.

The advantages and disadvantages of manual grinder and electric grinder are as follows:

Advantages and disadvantages of manual bean grinder:

1. The ground coffee powder is easy to be uneven.

2. Easy to produce friction heat.

3. Very little fine powder is produced.

Advantages and disadvantages of electric bean grinder:

1. The average size of ground coffee powder.

2. it is not easy to produce friction heat.

3. It is easy to produce fine powder

After looking at the comparative analysis of the above two kinds of bean grinders, it is often more difficult for us to make a choice of bean grinders. In fact, for our family, we often don't have to worry about these small places. If you grind the beans before drinking, it will have little effect on which kind of grinder you use.

These small places fall into the category of coffee manufacturers to consider. Most well-known coffee manufacturers use bean grinders that are not easy to produce friction heat because their customers are people who don't know when to finish their coffee. So coffee manufacturers need to pay more attention to the choice of coffee grinders.