How to choose a suitable commercial coffee roaster?

Nowadays, the coffee roasting machine on the market is dazzling, each with its own advantages. But judging whether a coffee roaster is suitable or not, there are always invariable standards.

1. Roast elegantly and operate simply

Many people who enter the coffee roasting industry always have the dream of a literary youth. However, in reality, the operation of a coffee roasting machine may be difficult to learn, and users may even be troubled by oily smoke. Therefore, when choosing a roasting machine, whether a coffee roasting machine is easy to use, whether it is convenient to operate, and how to deal with oil fume are all key points that need to be paid attention to.

We'd better choose an operating system that is simple and easy to use. For example, some commercial roasters are equipped with a control panel with a touch screen and several buttons.

And for enterprises, personnel changes often occur. If you are a coffee shop owner or roasting factory owner, then the simple operating system of this type of commercial roaster allows new employees to reach the operating level of the original employees in the shortest possible time.

2. Uniform quality, ideal roasting curve

What is the flavor of a cup of coffee? This reflects the personality of the coffee shop and the artistic interest of the roaster. Then, to achieve such a roasting effect and form an ideal roasting curve, the Maillard reaction and the reaction speed of the coffee heat balance during the roasting process are required. Different reactions and speeds will result in different roasting aromas, flavors and tastes.

In a coffee roaster, the source of control and regulation of this thermal equilibrium reaction is the burner, which is the only source of hot air heat in the roaster. Experienced baristas know that coffee roasting does not last long. And as the roasting time goes by, the coffee bean flavor will change faster and faster. Therefore, to quickly adjust the temperature of the hot air up and down to make it react quickly, it requires not only the power of the burner but also its sensitivity. Just like a good racing engine, it can be retracted and released freely and responsively.

At present, Kaleido uses the latest carbon fiber infrared electric heating tube, which has high sensitivity.

In order to continue this roasting curve, there will be no different batches of different flavors, or even different quality of the same batch. Choosing a coffee roaster also requires attention to stability and uniformity.

At present, most of the commercial machines on the market are drum roasters. During the coffee roasting process, the drum roaster transfers heat to the coffee beans through heat conduction and radiation through the roasting drum, so the material of the roasting drum is that nearly 30% of the heat energy is transferred to the coffee beans. And structure is very important. For example, Kaleido's roasting machine uses special cast iron and steel, and uses a double-layer structure in the structure to provide uniform heat conduction and heat radiation for coffee roasting.

At the same time, in order to ensure that the coffee beans have a constant mechanical trajectory in the drum, sufficient space and a special mixing blade design are required inside the roaster, which ensures a proper "bean/hot air" coefficient ratio, which is the coffee during the roasting process. The beans reserve a certain amount of space for thermal expansion.

3. Lock the aroma and remove the peculiar smell

Cooling is an important part of the coffee bean roasting process. Don't think that everything will be fine if the roasting drum is out! Because the temperature of freshly roasted beans is very high, if it is not cooled, the heat energy of the beans will continue to roast the coffee beans, which will deviate from the roasting degree expected by the roaster. At the same time, the high temperature will easily cause the aromatic substances of the coffee beans to evaporate quickly, causing the loss of flavor Exhausted. Therefore, when choosing roasters, we must pay special attention to their cooling devices and their cooling effects.

For those commercial coffee roasters with large batches, the cooling plate generally needs to be equipped with a flexible stirring device, which is controlled by program stirring, which can assist the cooling effect without breaking the coffee beans. It is worth mentioning that very small batches of commercial coffee roasters do not need to be equipped with a stirring device. For example, Kaleido’s 400g or 1kg commercial machines do not have a stirring device. This is because the cooling tray is equipped with downward air cooling. The fan is powerful and does not need manual stirring.

In addition to the cooling device that locks the aroma, the silver skin processing function of a roaster is also the focus of our consideration. Generally speaking, the outer skin, pulp and inner skin of the green beans have been removed in the hands of the coffee roaster, but part of the silver skin needs to be removed during the roasting process.

The silver rind itself is not harmful, but if the silver rind is not removed cleanly, it will affect the taste of the coffee; moreover, if the silver rind remains in the coffee roaster, the situation will be worse, because in the next roast, it will be burnt, causing The next batch of coffee beans produces a coke-like, off-flavor. In addition, the incomplete removal of the silver skin can also cause fire and cause safety hazards. Although the coffee roaster has safety protection, at least a pot of coffee will be destroyed, equipment will be destroyed, and economic losses will be caused. At the same time, the strength of the silver leather extraction is also particular. During the roasting process, the coffee beans become lighter due to dehydration and expansion of the volume of the beans. If the pulling force is too large, the structure of the coffee beans may be damaged, and the coffee beans may even be broken.

Kaleido's silver skin filter is not in the cooling tray, nor around the bean outlet. In fact, it has an independent and complete coffee silver skin suction and swirling silver skin separation system, which passes through a separate thermal cyclone separator. The tube performs effective silver skin collection, and the integrity of the silver skin collection is very good. Therefore, the roasted coffee beans are not only of uniform quality, but also have no silver skin at all.

4. Safety first

After all, operating a coffee roaster is still a job dealing with high temperatures and industries, so roasters and coffee lovers cannot ignore safety issues when choosing a roaster. A good roaster can remove these worries for the operator.

For example, the roasting temperature of the Kaleido roaster has an upper limit setting. If it reaches the upper limit of the roasting temperature, it will automatically stop heating. The upper limit of temperature is 230°C, of course it can be set freely.

5. Suitable for the era of mobile.

Nowadays, the roasting work has also caught up with the "hit ride" of the mobile terminal era, and some roasting machines are equipped with special roasting software.

For example, the specialized roasting software Artisan can be installed on the PC. The software can not only be used to view the roasting process and status, but also can automatically roast and copy the saved roasting records by saving the roasting records and using the software. The roasting software can set the (TDI) curve, so that the roaster can understand the development trend of roasted coffee beans.