US 12,078,336 B2
Lighting device, air conditioner, and control system
Satoru Okagaki, Tokyo (JP); Yusuke Fujii, Tokyo (JP); Haruka Suzuki, Tokyo (JP); Muneharu Kuwata, Tokyo (JP); and Kuniko Kojima, Tokyo (JP)
Assigned to MITSUBISHI ELECTRIC CORPORATION, Tokyo (JP)
Appl. No. 17/916,586
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Apr. 10, 2020, PCT No. PCT/JP2020/016143
§ 371(c)(1), (2) Date Oct. 3, 2022,
PCT Pub. No. WO2021/205657, PCT Pub. Date Oct. 14, 2021.
Prior Publication US 2023/0151958 A1, May 18, 2023
Int. Cl. F21V 33/00 (2006.01); F21S 8/00 (2006.01); F21V 8/00 (2006.01); F21V 14/06 (2006.01); F24F 13/20 (2006.01)
CPC F21V 33/0092 (2013.01) [F24F 13/20 (2013.01); G02B 6/0066 (2013.01); F21S 8/006 (2013.01); F21V 14/06 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An air conditioner comprising:
a housing including an inlet and an outlet, and an illumination opening at a position viewable by a user in an installed state;
a blower provided in an airflow path connecting the inlet and the outlet;
a first light source provided in the housing;
a light emitter provided in the housing, the light emitter including a light incident portion on a light receiving surface of the light emitter to receive light emitted from the first light source, a first light emission portion on a first surface of the light emitter to emit first light generated from the light and scattered by the light emitter, and a second light emission portion on a second surface of the light emitter different than the first surface to emit a second light generated from the light and transmitted by the light emitter that reaches the second surface without being emitted as the first light, the first light including light simulating natural light, the first surface of the light emitter being provided at a position facing the illumination opening and viewable from outside the housing through the illumination opening;
at least one light extractor provided at at least one position around the light emitter in the housing, the at least one light extractor deflecting the second light toward a space that is outside the housing and faces the illumination opening; and
a light limiter provided on an optical path in the housing between the light emitter and the at least one light extractor, the light limiter reducing the second light received by the at least one light extractor.