Filter-circulation coffee pot brewing method

When coffee is brewed by filter or steam, there is only one contact between coffee powder and boiling water, but when coffee is brewed in a filter circulating coffee pot, boiling water can come into contact with coffee powder several times and show a strong coffee flavor. When using a filter circulating coffee pot, first place a metal filter cup in the pot, then pour the boiling water into the pot, and then pour the coffee powder into the filter cup and heat it at the lower end of the pot. When the boiling water in the pot boils, it will rise through the only metal tube at the exit. Because the upper end is covered by a lid, the coffee liquid in the filter cup will drop and circulate.