Lg Electronics Inc.

Jongkwan Choi

Jungwon Lee

Wonkyu Lee

Seoyoun Kim

A coffee extraction apparatus includes: a grinder grinding whole beans into coffee powder having a preset size or less and discharging the coffee powder, a grinder inlet defined at a first side of the grinder to introduce the whole beans to the grinder, a grinder outlet defined at a second side of the grinder and discharging the coffee powder, and a first extractor. The first extractor includes: a receiver inlet that faces the grinder and that receives the discharged coffee powder, a filter part receiving the coffee powder through the receiver inlet and extracting coffee liquid by rotating the coffee powder with water of a first temperature, the first temperature being equal to or lower than 25 degrees Celsius, and a receiver that receives the water of the first temperature and that is configured to store the water of the first temperature or the extracted coffee liquid.

Coffee extraction apparatus

A coffee extraction apparatus includes: a first grinder that includes a first burr configured to rotate, a first burr through-hole defined in the first burr in an axial direction of the first burr, a first burr inlet, a first burr outlet discharging coffee powder, a second burr inserted into the first burr through-hole through the first burr outlet to define a grinding space for grinding the whole beans with the first burr, and a burr coupler that supports the second burr and that couples the second burr to the first grinder. The apparatus further includes an extractor that defines an opening on a first side facing the first burr outlet to receive the coffee powder discharged through the first burr outlet and that mixes the coffee powder with water to extract coffee liquid where the burr coupler is configured to selectively separate the first grinder from the second burr.

A coffee extraction apparatus includes: a first burr grinding supplied whole beans, a first burr through-hole defined in the first burr, a first burr inlet receiving the whole beans, a first burr outlet discharging coffee powder, a second burr inserted into the first burr through-hole through the first burr outlet to define a grinding space for grinding of the whole beans with the first burr, a burr coupler coupled to the second burr to move the second burr, a first rotary part coupled to the first burr to rotate the first burr, a second rotary part connected to the burr coupler and rotating to move the burr coupler in an axial direction of the first burr to adjust a depth of insertion of the second burr into the first burr, an extractor that receives and mixes the coffee powder and water to extract coffee liquid.

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Seoul, South Korea

Jongkwan Choi