Patent ID: 7698992
Filing Date: 2010-04-20
Classification: A47J

Abstract:
1. A multi-function coffee maker, comprising: a casing, a cover assembly with a brewing room inside, a water reservoir, a water pump, an electric heater, a water distributor assembly, a control valve assembly, a base assembly, a control circuit and brewing accessories; wherein said brewing accessories at least include an espresso coffee brewing accessory and a drip coffee brewing accessory, which are interchangeable and each can be loaded within said brewing room of said cover assembly to form an individual brewing chamber; wherein said water reservoir, water pump, water distributor assembly, control valve assembly and brewing chamber construct a water loop of said coffee maker, two kinds of water flow of different pressures may be generated within said water loop, one kind of water flow is of 0-2.5 BAR for brewing drip coffee, the other kind of water flow is of 8-10 BAR for brewing espresso coffee; wherein said control circuit comprises a control chip, and connected with said control chip are a sampling circuit for thermal sensors, a control circuit for said water pump, a control circuit for said electric heater and a detection circuit for the brewing accessory; wherein said detection circuit for the brewing accessory includes a plurality of proximity switch assemblies, each proximity switch assembly includes a magnetic element installed on one of said brewing accessories and a magnetic field sensor installed on said brewing room, so that, when said brewing accessory is loaded into said brewing room, said control chip will obtain a signal to detect and distinguish the brewing accessory in use; and wherein brewing control program is set within said control chip, said brewing control program contains working modes including at least espresso coffee brewing mode and drip coffee brewing mode; by said water distributor assembly and said control circuit, water flow of suitable pressure is provided into said brewing chamber and the brewing accessory in use is detected automatically so as to initiate a corresponding work mode.