公开(公告)号：US20210307556A1

公开(公告)日：2021-10-07

申请号：US17201602

申请日：2021-03-15

Applicant: LG Electronics Inc.

Inventor： Wonkyu LEE ,  Jungwon LEE ,  Seoyoun KIM ,  Jongkwan CHOI

IPC: A47J31/42 ,  A47J31/053 ,  A47J31/00 ,  A47J31/057

Abstract: 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.

公开(公告)号：US20210307558A1

公开(公告)日：2021-10-07

申请号：US17206365

申请日：2021-03-19

Applicant: LG Electronics Inc.

Inventor： Wonkyu LEE ,  Jungwon LEE ,  Seoyoun KIM ,  Jongkwan CHOI

IPC: A47J31/42

Abstract: 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 to define a grinding space for grinding the whole beans, a first rotary part rotating the first burr, a first gear part including (i) a first main gear rotating at a fixed position and (ii) a first subordinate gear that rotates and that moves in a circumferential direction of the first rotary part according to rotation of the first main gear, an extractor that receives and mixes the coffee powder and the coffee powder and water to extract coffee liquid. Based on the first main gear rotating, the first subordinate gear is configured to connect to the first rotary part.

公开(公告)号：US20210307557A1

公开(公告)日：2021-10-07

申请号：US17201740

申请日：2021-03-15

Applicant: LG Electronics Inc.

Inventor： Wonkyu LEE ,  Jungwon LEE ,  Seoyoun KIM ,  Jongkwan CHOI

IPC: A47J31/42 ,  A47J42/40 ,  A47J42/50

Abstract: 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.

公开(公告)号：US20210298515A1

公开(公告)日：2021-09-30

申请号：US17201556

申请日：2021-03-15

Applicant: LG Electronics Inc.

Inventor： Wonkyu LEE ,  Jungwon LEE ,  Seoyoun KIM ,  Jongkwan CHOI

IPC: A47J31/053 ,  A47J31/00 ,  A47J31/057 ,  A47J31/42

Abstract: 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.