# US 11,998,679 B2 · Emission device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,998,679 B2 - Document ID: US11998679B2 - Status: Granted - Kind: B2 - Application number: 18/228,567 - Filed: 2023-07-31 - Published: 2023-11-23 - Granted: 2024-06-04 - Earliest claimed: 2021-02-12 - Assignees: Daikin Industries, Ltd. - Applicants: Daikin Industries, Ltd. - Inventors: Junichiro Arai; Nobuaki Takeda; Satoshi Ozawa - Web page: https://patentgrep.com/patent/US11998679B2 ## CPC - A61M 11/00: Sprayers or atomisers specially adapted for therapeutic purposes (in general B05B; {aerosol containers B65D83/14}) - A61B 5/4836: {Diagnosis combined with treatment in closed-loop systems or methods (A61B5/0036 takes precedence)} - A61L 9/14: using sprayed or atomised substances {including air-liquid contact processes} - A61M 21/02: for inducing sleep or relaxation, e.g. by direct nerve stimulation, hypnosis, analgesia (for massage A61H; electrotherapy A61N, e.g. applying alternating or intermittent electric currents for producing anaesthesia A61N1/36021) - A61L 2209/134: Distributing means, e.g. baffles, valves, manifolds, nozzles - A61M 2205/3303: Using a biosensor - A61M 2205/3334: Measuring or controlling the flow rate - A61M 2206/16: Rotating swirling helical flow, e.g. by tangential inflows - A61M 2230/06: Heartbeat rate only - A61M 2230/40: Respiratory characteristics - A61M 2230/50: Temperature - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - A61L: METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES (preservation of bodies or disinfecting characterised by the agents employed A01N; preserving, e.g. sterilising, food or foodstuffs A23; preparations for medical, dental or toiletry purposes A61K) ## Abstract An emission device includes an emission unit, and a controller. The emission unit emits a useful substance to a space where a target person is present. The controller controls the emission unit based on a circadian rhythm of the target person. The controller determines which one of a sympathetic nerve or a parasympathetic nerve is dominant in an autonomic nerve system of the target person, estimates the circadian rhythm of the target person in the autonomic nerve system from a result of the determination, determines a time to start emitting the useful substance based on the circadian rhythm estimated, and emits the useful substance from the emission unit when the time to start the emitting has come. ## Claims ### Claim 1 An emission device, comprising: an emission unit configured to emit a useful substance through a nozzle to a space where a target person is present; and a controller configured to control the emission unit based on a circadian rhythm of the target person, the controller being configured to determine which one of a sympathetic nerve or a parasympathetic nerve is dominant in an autonomic nerve system of the target person, estimate the circadian rhythm of the target person in the autonomic nerve system from a result of the determination, determine a time to start emitting the useful substance based on the circadian rhythm estimated, and emit the useful substance from the emission unit when the time to start the emitting has come. ### Claim 2 (depends on 1) The emission device of claim 1, wherein the controller is configured to control the emission unit to emit the useful substance so that a cumulative total of time during which the useful substance is emitted from the emission unit is one hour or more in one day. ### Claim 3 (depends on 2) The emission device of claim 2, further comprising: a concentration sensor configured to measure a concentration of the useful substance supplied to the target person, the controller being configured to adjust an emission amount of the useful substance based on an output from the concentration sensor. ### Claim 4 (depends on 2) The emission device of claim 2, further comprising: a biosensor configured to acquire biological information of the target person, the controller being configured to control the emission unit to emit the useful substance based on the biological information acquired by the biosensor. ### Claim 5 (depends on 1) The emission device of claim 1, further comprising: a concentration sensor configured to measure a concentration of the useful substance supplied to the target person, the controller being configured to adjust an emission amount of the useful substance based on an output from the concentration sensor. ### Claim 6 (depends on 2) The emission device of claim 2, wherein the emission unit includes a vortex ring generation unit configured to emit an airflow in a vortex ring shape. ### Claim 7 (depends on 2) The emission device of claim 2, wherein the emission unit includes an electrostatic sprayer. ### Claim 8 (depends on 1) The emission device of claim 1, further comprising: a concentration sensor configured to measure a concentration of the useful substance supplied to the target person, the controller being configured to adjust an emission amount of the useful substance based on an output from the concentration sensor. ### Claim 9 (depends on 8) The emission device of claim 8, wherein the emission unit includes a vortex ring generation unit configured to emit an airflow in a vortex ring shape. ### Claim 10 (depends on 8) The emission device of claim 8, wherein the emission unit includes an electrostatic sprayer. ### Claim 11 (depends on 1) The emission device of claim 1, further comprising: a biosensor configured to acquire biological information of the target person, the controller being configured to control the emission unit emit the useful substance based on the biological information acquired by the biosensor. ### Claim 12 (depends on 11) The emission device of claim 11, wherein the biosensor is configured to detect a heart rate or a body temperature of the target person as the biological information, and the controller is configured to estimate the circadian rhythm of the target person from the heart rate or the body temperature detected by the biosensor, and control the emission unit to emit the useful substance based on the circadian rhythm. ### Claim 13 (depends on 12) The emission device of claim 12, wherein the biosensor is configured to detect a respiratory cycle of the target person as the biological information, and the controller is configured to control the emission unit to emit the useful substance at a time when the target person inhales air. ### Claim 14 (depends on 12) The emission device of claim 12, wherein the emission unit includes a vortex ring generation unit configured to emit an airflow in a vortex ring shape. ### Claim 15 (depends on 11) The emission device of claim 11, wherein the biosensor is configured to detect a respiratory cycle of the target person as the biological information, and the controller is configured to control the emission unit to emit the useful substance at a time when the target person inhales air. ### Claim 16 (depends on 15) The emission device of claim 15, wherein the emission unit includes a vortex ring generation unit configured to emit an airflow in a vortex ring shape. ### Claim 17 (depends on 11) The emission device of claim 11, wherein the emission unit includes a vortex ring generation unit configured to emit an airflow in a vortex ring shape. ### Claim 18 (depends on 1) The emission device of claim 1, wherein the emission unit includes a vortex ring generation unit configured to emit an airflow in a vortex ring shape. ### Claim 19 (depends on 1) The emission device of claim 1, wherein the emission unit includes an electrostatic sprayer. ### Claim 20 (depends on 1) The emission device of claim 1, further comprising: an environment adjustment unit configured to adjust an environmental condition of the space; a storage configured to store data on the useful substance and an environmental condition associated with the useful substance, the controller being configured to acquire the environmental condition associated with the useful substance emitted from the emission unit based on the data stored in the storage, and control the environment adjustment unit to meet the environmental condition.