Now some high-end coffee machines can not only brew coffee of different tastes, but also control the temperature, concentration and fineness of coffee powder to meet the requirements of different tastes, and can realize continuous brewing, which is popular with users. But do you know? Is electromagnetic pump important in automatic coffee machine? Let's first understand the working principle of the coffee machine.

Working principle of coffee machine

Many factors, such as the fineness of coffee powder, the water temperature for brewing coffee and the concentration of coffee, will affect the taste of coffee. Therefore, these factors must be considered in the design of automatic coffee machine.

The best brewing method of coffee is to extract and brew the compacted medium fine coffee powder with hot water at 86 ℃, and it is most appropriate to control the amount of each cup of coffee at 80~100ml. The hot water with high temperature (about 86 ℃) is sent to the brewing mechanism through the pipeline system to keep the hot water in contact with the coffee powder for about 9s, so that the useful substances in the coffee powder are dissolved in the hot water and flow out with the hot water. The temperature of the coffee in this process is cooled to 62 ℃ and flows into the coffee cup. It is best to drink it within 5 to 10 minutes.

Therefore, the design parameters of the coffee machine should be based on this.

In terms of structure, the coffee machine can be divided into several systems: crushing, water supply, brewing, slag removal and control. In order to improve the automation of the coffee machine, brewing and dregs removal parts are often designed as a whole.

In terms of technological process, firstly, the roasted coffee beans are processed by a grinder to obtain coffee powder with a certain particle size; The coffee powder is automatically delivered to the brewer. The brewer compacts the coffee powder to make it have a certain compactness. At the same time, the brewer is closed into a closed space for brewing coffee. In terms of waterway, clean water is pressurized by the electromagnetic pump to supply water to the waterway system. The high-pressure water first enters the heater for heating, which heats the water temperature to the set temperature. Then, the hot water enters the brewer, contacts and extracts with the coffee powder to obtain the coffee liquid with appropriate concentration, which flows out of the coffee outlet. After brewing, the system will automatically remove the residue. Reset the moving parts to complete a working cycle.