Coffee maker and coffee preparation method

A coffee preparation method, wherein the coffee preparation method adopts a coffee maker to brew coffee, wherein the coffee maker comprises:

• a stator frame;
• a grinding chamber, having a cavity;
• and a cover;
• wherein the cavity is mounted on the stator frame, the cavity is covered by the cover to form a grinding cavity, a bottom of the grinding cavity is provided with a beverage outlet;
• a grinding device, having a grinding knife tackle, provided in the grinding cavity;
• and a motor, provided outside the grinding cavity and configured for driving the grinding knife tackle to rotate;
• a coffee strainer, circularly arranged on a periphery of the grinding knife tackle;
• wherein, a lower part of the coffee strainer abutting a bottom wall of the grinding cavity is configured to separate the grinding cavity into a grinding bean cavity and a beverage cavity around a periphery of the grinding bean cavity, a beverage outlet is communicated with the beverage cavity;
• a hot water supply device, communicated with the grinding cavity;
• the coffee preparation method comprises following steps:
• the grinding knife tackle is configured to grind coffee beans that are disposed into the grinding bean cavity to coffee powders;
• and
• the hot water supply device supplies hot water into the grinding bean cavity, after the hot water is injected to reach a preset volume, a pressure space is formed in an upper grinding bean cavity, configured to pressure brew coffee liquid in the grinding bean cavity.