# US 12,003,189 B2 · Control power source apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,003,189 B2 - Document ID: US12003189B2 - Status: Granted - Kind: B2 - Application number: 17/679,396 - Filed: 2022-02-24 - Published: 2022-06-09 - Granted: 2024-06-04 - Earliest claimed: 2019-10-29 - Assignees: Daikin Industries, Ltd. - Applicants: Daikin Industries, Ltd. - Inventors: Toshiyuki Tanaka; Minoru Chihara; Shinji Kouno - Web page: https://patentgrep.com/patent/US12003189B2 ## CPC - H02M 7/04: by static converters - F24F 11/88: Electrical aspects, e.g. circuits - H02M 7/003: {Constructional details, e.g. physical layout, assembly, wiring or busbar connections} - H02M: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (transformers H01F; dynamo-electric converters H02K47/00; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P) - F24F: AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING (removing dirt or fumes from areas where they are produced B08B15/00; vertical ducts for carrying away waste gases from buildings E04F17/02; tops for chimneys or ventilating shafts, terminals for flues F23L17/02) ## Abstract A control power source apparatus 100 includes: a power source board 2 accommodated in an electric component box 1 made of an incombustible material; a first power source unit PS1 provided at the power source board 2 and configured to supply electric power having an upper limit of a predetermined value; a second power source unit PS2 provided at the power source board 2 and configured to supply electric power having an upper limit of a predetermined value; a first load circuit L1 provided outside the electric component box 1 and configured to be supplied with electric power from the first power source unit PS1; and a second load circuit L2 provided outside the electric component box 1 so as to be electrically independent from the first load circuit L1, and configured to be supplied with electric power from the second power source unit PS2. ## Claims ### Claim 1 A control power source apparatus comprising: a power source board (2) accommodated in an electric component box (1) made of an incombustible material; a first power source unit (PS1) provided at the power source board (2) and comprising a first current limiting circuit configured to enable the first power source unit (PS1) to supply electric power that is limited by an upper limit of a predetermined value; a second power source unit (PS2) provided at the power source board (2) and comprising a second current limiting circuit configured to enable the second power source unit (PS2) to supply electric power that is limited by an upper limit of a predetermined value; a step-down circuit (3) disposed outside the electric component box (1) and connected to the first current limiting circuit or the second current limiting circuit, the step-down circuit being configured to step down voltage outputted from the electric component box (1); a first load circuit (L1) provided outside the electric component box (1) and configured to be supplied with electric power from the first power source unit (PS1); and a second load circuit (L2) provided outside the electric component box (1) so as to be electrically independent from the first load circuit (L1), and configured to be supplied with electric power from the second power source unit (PS2). ### Claim 2 (depends on 1) The control power source apparatus according to claim 1, the apparatus comprising: a first case (C1) accommodating the electric component box (1); a second case (C2) accommodating the first load circuit (L1) and the second load circuit (L2); and a connector (4) electrically connecting the first case (C1) and the second case (C2). ### Claim 3 (depends on 2) The control power source apparatus according to claim 2, wherein the step-down circuit (3) is accommodated in the first case (C1). ### Claim 4 (depends on 2) The control power source apparatus according to claim 2, wherein, the connector (4) has wiring alignment such that wiring for a GND is provided between a voltage output line of the first power source unit (PS1) and a voltage output line of the second power source unit (PS2). ### Claim 5 (depends on 2) The control power source apparatus according to claim 2, wherein the second case (C2) accommodates an input-output substrate (5) connected to the connector (4) and configured to receive output of the first power source unit (PS1) and output of the second power source unit (PS2), and a CPU substrate (6) equipped with a CPU and configured to receive output of the second power source unit (PS2) via the input-output substrate (5). ### Claim 6 (depends on 2) The control power source apparatus according to claim 2, the apparatus comprising one or a plurality of third cases (C3) including load circuits similar to those of the second case (C2), wherein the connector constitutes a slot (10) provided with the second case (C2) and the third case (C3) and configured to electrically connect the second case (C2) and the third case (C3) to each other.