Power device and safety control method thereof
First Claim
1. An air conditioner comprising:
- at least one indoor unit; and
a wired controller connected to the at least one indoor unit through two lines to receive power from the at least one indoor unit and to perform data communication with the at least one indoor unit,wherein each of the at least one indoor unit and the wired controller comprises a communication unit to modulate a first frequency communication signal into a second frequency communication signal and transmit the second frequency communication signal when performing data communication and to demodulate a received second frequency communication signal into a first frequency communication signal, andwherein the communication unit of the wired controller demodulates the received second frequency communication signal into the first frequency communication signal using a voltage difference between second frequency communication signals received through the two lines, andwherein second frequencies of the second frequency communication signals each are higher than first frequencies of the first frequency communication signals.
1 Assignment
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Accused Products
Abstract
An air conditioner includes at least one indoor unit and a wired controller connected to the indoor unit through two lines to receive power from the indoor unit and to perform data communication with the indoor unit. Each of the indoor unit and the wired controller includes a communication unit that modulates a low-frequency communication signal into a high-frequency communication signal and transmits the high-frequency signal and demodulates a received high-frequency signal into a low-frequency signal. When a plurality of indoor units and a wired controller perform communication, a communication signal is transmitted after being modulated into a high-frequency signal and linking the high-frequency signal with DC power. This reduces the inductance of an inductor required to separate the linked high-frequency signal into DC power and a communication signal and the capacitance of a capacitor required to link the signal with DC power, reducing PCB size and inductor and capacitor costs.
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Citations
20 Claims
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1. An air conditioner comprising:
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at least one indoor unit; and a wired controller connected to the at least one indoor unit through two lines to receive power from the at least one indoor unit and to perform data communication with the at least one indoor unit, wherein each of the at least one indoor unit and the wired controller comprises a communication unit to modulate a first frequency communication signal into a second frequency communication signal and transmit the second frequency communication signal when performing data communication and to demodulate a received second frequency communication signal into a first frequency communication signal, and wherein the communication unit of the wired controller demodulates the received second frequency communication signal into the first frequency communication signal using a voltage difference between second frequency communication signals received through the two lines, and wherein second frequencies of the second frequency communication signals each are higher than first frequencies of the first frequency communication signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A communication method for an air conditioner comprising at least one indoor unit and a wired controller connected through two lines, the method comprising:
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supplying power from the at least one indoor unit to the wired controller through the two lines; modulating a first frequency communication signal into a second frequency communication signal and transmitting the second frequency communication signal by linking the second frequency communication signal with the two lines; and demodulating, when a second frequency communication signal is received through the two lines, the received second frequency communication signal into a first frequency communication signal and performing operation control based on the demodulated communication signal, wherein demodulating the received second frequency communication signal into the first frequency communication signal comprises demodulating the received second frequency communication signal into the first frequency communication signal using a voltage difference between second frequency communication signals received through the two lines, and wherein second frequencies of the second frequency communication signals each are higher than first frequencies of the first frequency communication signals. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification