# US 2023/0263285 A1 · Hair dryer > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0263285 A1 - Document ID: US20230263285A1 - Status: Published application - Kind: A1 - Application number: 18/139,438 - Filed: 2023-04-26 - Published: 2023-08-24 - Earliest claimed: 2021-12-07 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Hwangmook CHO; Donggun KO; Jinbaek KIM; Eungryeol SEO - Web page: https://patentgrep.com/patent/US20230263285A1 ## CPC - A45D 20/12: Details thereof or accessories therefor, e.g. nozzles, stands - A45D 20/10: Hand-held drying devices, e.g. air douches - A45D: HAIRDRESSING OR SHAVING EQUIPMENT (wigs, toupees or the like A41G3/00, A41G5/00; hairdressers' chairs A47C1/04; hair cutting appliances, razors B26B); EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING ## Abstract A hair dryer includes a cylindrical body; a handle disposed on a lower portion of the body; a main fan motor disposed inside the handle; and a sub fan motor disposed inside the body. The body includes a first flow passage extending along a longitudinal direction of the body in a central region of the body; and a second flow passage extending along the longitudinal direction of the body outside the first flow passage. Air introduced from outside by the main fan motor flows along the second flow passage, and air introduced from the outside by the sub fan motor flows along the first flow passage. ## Claims ### Claim 1 A hair dryer comprising: a body formed in a cylindrical shape and having a first flow passage formed to extend along a longitudinal direction of the body in a central region of the body, and a second flow passage formed to extend along the longitudinal direction of the body outside of the first flow passage; a handle being disposed on a lower portion of the body; a main fan motor to receive air introduced from outside of the hair dryer and generate a main airflow, the main fan motor being disposed inside the handle; and a sub fan motor to receive air introduced from the outside of the hair dryer and generate a sub airflow, the sub fan motor being disposed inside the body, wherein the main airflow flows along the second flow passage, and the sub airflow flows along the first flow passage. ### Claim 2 (depends on 1) The hair dryer of claim 1, wherein an outlet of the first flow passage is provided at a central portion of one end of the body, and an annular outlet of the second flow passage surrounding the outlet of the first flow passage is provided around the outlet of the first flow passage. ### Claim 3 (depends on 2) The hair dryer of claim 2, wherein the sub fan motor is disposed at another end of the body. ### Claim 4 (depends on 3) The hair dryer of claim 3, further comprising: a heater being disposed along the second flow passage. ### Claim 5 (depends on 4) The hair dryer of claim 4, further comprising: a printed circuit board being disposed inside the handle and configured to supply power to the main fan motor, the sub fan motor, and the heater. ### Claim 6 (depends on 4) The hair dryer of claim 4, further comprising: a printed circuit board being disposed inside the body and configured to supply power to the heater. ### Claim 7 A hair dryer comprising: a body formed in a cylindrical shape and having a first flow passage formed to extend along a longitudinal direction of the body in a central region of the body, and a second flow passage formed to extend along the longitudinal direction of the body outside of the first flow passage; handle connected to the body at a substantially right angle; a main fan motor to receive air introduced from outside of the hair dryer and generate a main airflow, the main fan motor being disposed inside the handle; and a sub fan motor to receive air introduced from the outside of the hair dryer and generate a sub airflow, the sub fan motor being disposed inside the body, wherein the main airflow flows along the first flow passage, and the sub airflow flows along the second flow passage. ### Claim 8 (depends on 7) The hair dryer of claim 7, wherein an outlet of the first flow passage is provided at a central portion of one end of the body, and an annular outlet of the second flow passage surrounding the outlet of the first flow passage is provided around the outlet of the first flow passage. ### Claim 9 (depends on 8) The hair dryer of claim 8, further comprising: a heater being disposed along the first flow passage. ### Claim 10 (depends on 9) The hair dryer of claim 9, further comprising: a printed circuit board being disposed inside the handle and configured to supply power to the main fan motor, the sub fan motor, and the heater. ### Claim 11 (depends on 9) The hair dryer of claim 9, further comprising: a printed circuit board being disposed inside the body and configured to supply power to the heater. ### Claim 12 A hair dryer comprising: a body having a cylindrical shape and having a first flow passage extending along a longitudinal direction of the body in a central region of the body, a second flow passage extending along the longitudinal direction of the body outside the first flow passage, and a heater being disposed along the second flow passage; a handle connected to the body at a substantially right angle; a main fan motor being disposed inside the handle; and a sub fan motor being disposed inside the body. ### Claim 13 (depends on 12) The hair dryer of claim 12, wherein an outlet of the first flow passage is provided at a central portion of one end of the body, and an annular outlet of the second flow passage surrounding the outlet of the first flow passage is provided around the outlet of the first flow passage. ### Claim 14 (depends on 13) The hair dryer of claim 13, wherein air introduced from outside of the hair dryer and generated into a main airflow by the main fan motor flows along the second flow passage, and air introduced from the outside of the hair dryer and generated into a sub air flow by the sub fan motor flows along the first flow passage. ### Claim 15 (depends on 14) The hair dryer of claim 14, further comprising: a printed circuit board being disposed inside the handle and configured to supply power to the main fan motor, the sub fan motor, and the heater. ### Claim 16 (depends on 1) The hair dryer of claim 1, wherein the sub airflow has a lower pressure, a lower velocity, and a larger flow rate than the main airflow.