How much is the coffee grinder? how to grind coffee powder? coffee powder grinder classification introduction

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To make a good cup of coffee, of course, it is necessary to use freshly ground coffee powder made from freshly roasted coffee beans. Freshly ground coffee powder is easier to release the essence of coffee and extract the aromatic substances from coffee. Freshly ground coffee has stronger aroma, richer taste and fuller taste, which is the reason why coffee fans have a special preference for freshly ground coffee.

Coffee fans decide the grinding method of coffee beans according to their own brewing methods and taste preferences, because the thickness of the ground coffee powder directly affects the taste of coffee. Now let's talk about how to maximize the flavor of coffee beans and pave the way for making the perfect cup of coffee.

● Coffee Grinding thickness affects Coffee extraction

There is a corresponding relationship between the grinding degree of coffee powder and various brewing methods. On the whole, the degree of grinding required by the brewing method of coffee powder with longer contact time with water is usually thicker, the reason is that the finer the grinding degree of coffee powder is, the larger the contact area between coffee powder and water is, and too long brewing time will lead to excessive extraction of oil and aromatic substances in coffee, making coffee taste bitter. Coffee powder with a finer degree of grinding should be brewed in a way that takes a shorter time to make, that is, a shorter contact time between coffee powder and water. Contrary to the previous situation, if the coffee powder is too thick, short brewing time can not fully extract the essence of coffee, coffee taste thin, plain taste. What needs extra attention is that the consistency of the grinding degree of coffee powder will directly affect the final taste and quality of coffee.

Classification of coffee grinders (by material)

Coffee bean grinder with ● ceramic core

advantage

Inferior position

Noise: coffee bean grinder with relatively low noise and quieter

Temperature: coffee bean grinder with high speed, slow heating and relatively stable temperature.

Deformation: the ceramic is not easy to deform after heating up, and the shape is relatively normal.

The noise of the ceramic core coffee bean grinder is relatively small, the temperature is relatively low, and the coffee powder will not be reheated; the thickness of the coffee powder is relatively stable.

Hardness: the inner core is ceramic, which is lower in hardness than stainless steel blade and has certain flexibility.

Fragile: coffee bean grinder with very high breakage rate. Especially when coffee beans have foreign bodies (stones, nails, etc.)

Degree of grinding: improved flexibility, easy to lead to uneven grinding

Performance-to-price ratio: in general, ceramic core grinder is more expensive than stainless steel core grinder.

The coffee bean grinder with ceramic core is only suitable for household use, not for commercial use.

Coffee bean grinder with ● stainless steel inner core

advantage

Inferior position

Hardness: the inner core is stainless steel, which is hard and not easy to wear.

Degree of grinding: the stainless steel core has a blade, and the coffee bean is relatively uniform in thickness.

Performance-to-price ratio: in general, stainless steel core grinder is cheaper than ceramic core grinder.

The coffee bean grinder with stainless steel inner core is more suitable for commercial use.

Noise: compared with ceramic core coffee bean grinder, the noise is relatively loud

Temperature: coffee beans are ground at high speed, and the coffee powder is reheated.

Deformation: coffee bean grinder with stainless steel inner core heats up faster, which can easily lead to inner core deformation.

Classification of ● coffee grinders (by grinding wheel)

● flat knife coffee bean grinder

Flat knife working principle: coffee bean grinding, flaky appearance, composed of upper and lower cutters, fixed motor base, rotating cutter head to cut coffee beans.

Coffee flavor: strong, single, obvious aroma

Disadvantages of ● flat knife grinder

A. the grinding is relatively uneven.

The upper and lower cutters of the flat-knife grinder are placed in a parallel manner, and the coffee beans can be pushed into the cutterhead only by the rotation of the bottom cutter head, so the weight of the coffee beans placed above will affect the uniformity of the coffee beans entering the cutterhead, and then affect the uniformity of grinding.

B. Excessive extraction is easy to produce bad taste.

Due to the small size of the flat sheet, the xylem extracted for a long time is easy to precipitate into too much water to produce miscellaneous flavor and astringent taste.

Advantages of ● flat knife grinder

A. the aroma of coffee is excited in a short time.

The coffee particles ground by flat knife show flake shape, which can increase the area of cell wall and increase the concentration and extraction rate of coffee liquid in a short time, so that the aroma of coffee can be significantly improved in a short time.

B. the proportion of fine coffee powder has increased.

As a result of pushing, the number of collisions between coffee beans increases, which leads to an increase in the proportion of fine powder; this is the reason why the common flat knife grinder has a slightly lower uniformity of coffee powder and more fine powder.

● * flat knife grinder must be replaced after grinding 300kg to 400kg coffee beans.

Cone knife coffee bean grinder

Cone knife working principle: coffee bean grinding method, the shape is block, the cutter head is placed at the bottom, and grinding is carried out by the peripheral cutter head.

Coffee taste: round, complex

Advantages of ● cone cutter grinder

A. the degree of grinding is relatively uniform and the subdivision of coffee is relatively reduced.

The conical knife grinder places a conical cutter head at the bottom, and then grinds 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 down, compared with the flat knife grinder, the number of collisions between particles will be much less, so the proportion of fine powder produced by the conical knife will be much less than that of the flat knife. And the uniformity of coffee grinding will be greatly improved.

B. the bad taste is reduced.

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.

Disadvantages of ● conical knife grinder

The cone knife grinding particles will be close to granules, resulting in a longer water absorption path of coffee particles, and it will take longer for the interior to come into 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.

* the cone grinder needs to be replaced after grinding 600 to 800 kilograms of coffee beans.

Summary of ●

When a high concentration of coffee is needed in a short period of time, the flat knife grinder is a good choice, and the high concentration will also make the aroma rich, so the aroma of the flat knife grinder is much more obvious than that of the conical knife grinder. When better taste is needed, the granular coffee powder produced by the cone knife grinder can reduce the xylem contact time, although the aroma is not as obvious as the flat knife grinder, but even if the extraction time is prolonged, the taste is still better.

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