INDOOR UNIT
An indoor unit applicable to an air conditioner is configured to recognize physical connection between with an outdoor unit in a communication state suitable for each form of the air conditioner. An indoor unit (3) included in an air conditioner including an outdoor unit includes a power receiving c...
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Format: | Patent |
Sprache: | eng ; fre ; ger |
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Zusammenfassung: | An indoor unit applicable to an air conditioner is configured to recognize physical connection between with an outdoor unit in a communication state suitable for each form of the air conditioner. An indoor unit (3) included in an air conditioner including an outdoor unit includes a power receiving circuit (PR2), a low-frequency transmission and reception circuit (306) as a first reception circuit, a high-frequency transmission and reception circuit (304) as a transmission and reception circuit, and an MCU (303) as a inner-controller. The low-frequency transmission and reception circuit (306) can receive a current signal transmitted from an outdoor unit (2) by using a current loop formed by a power line (L 1) included in power supply wiring (W1). Regarding a first communication state in which physical connection between with the outdoor unit (2) is recognized and a second communication state in which communication for operation of the air conditioner is performed between with the outdoor unit (2), the MCU (303) selects use of the low-frequency transmission and reception circuit (306) and the high-frequency transmission and reception circuit (304) in the first communication state and the second communication state. |
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