US 6,865,898 B2Granted

Air conditioning system

AssigneeHitachi, Ltd.

InventorsYoshiyukie Yamanashi, Keiji Satou, Masami Ozaki, Masamichi Mochizuki, Tatsuya Sugiyama, Noriyuki Bunkou

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Abstract

An air-conditioning system having a plurality of air conditioners, each air conditioner including an outdoor transmission/receiving unit for transmitting by superposing the operation data on an outdoor power line for supplying power to an outdoor unit and receiving the operation data superposed on the outdoor power line, an indoor transmission/receiving unit for transmitting by superposing the operation data on an indoor power line for supplying power to an indoor unit and receiving the operation data superposed on the indoor power line, an outdoor conversion unit for transmitting by converting the operation data superposed on the outdoor power line into a signal and receiving and superposing the signal on the outdoor power line, and an indoor conversion unit for transmitting by converting the operation data superposed on the indoor power line into a signal and receiving and superposing the signal on the indoor power line.

Claims16

Dependent claims

An air-conditioning system comprising:

a plurality of indoor units and a plurality of outdoor units each including a compressor, operatively controlled to transmit and receive operation data;
an outdoor transmission/receiving unit included in each of said outdoor units, for transmitting by superposing operation data on an outdoor power line for supplying power to said outdoor units and receiving said operation data superposed on said outdoor power line;
an indoor transmission/receiving unit included in each of said indoor units, for transmitting by superposing operation data on an indoor power line for supplying power to said indoor units and receiving said operation data superposed on said indoor power line;
an outdoor conversion unit for transmitting a radio signal produced by converting said operation data superposed on said outdoor power line into the radio signal, and receiving and superposing a radio signal on said outdoor power line;
and
an indoor conversion unit for transmitting a radio signal produced by converting said operation data superposed on said indoor power line into the radio signal and receiving and superposing a radio signal on said indoor power line,
wherein an identification signal is assigned to each of said outdoor and indoor conversion units, and said radio signal contains operation data and a flag information representing the identification signal, and
wherein each of said outdoor and indoor conversion units determines whether a received radio signal is required to be received from a desired conversion unit based on the identification signal contained in the received radio signal, and when the received radio signal is required to be received from the desired conversion unit, samples and converts the received radio signal into a power-superposed signal.

5 more elements

An air conditioning system comprising:

one or more outdoor units provided with an outdoor power line for supplying power thereto, each having a compressor mounted thereon to generate compressed air;
one or more indoor units arranged to handle compressed air received from the one or more outdoor units, and provided with an indoor power line for supplying power thereto;
an outdoor transmission/reception unit included in each of the one or more outdoor units, to transmit and receive operation data superposed on the outdoor power line;
an indoor transmission/reception unit included in each of the one or more indoor units, to transmit and receive operation data superposed on the indoor power line;
an outdoor conversion unit coupled to the outdoor power line, to convert operation data superposed on the outdoor power line into a radio signal for wireless transmission, and to receive a radio signal, via wireless communication, and superpose operation data included in the radio signal received on the outdoor power line;
and
an indoor conversion unit coupled to the indoor power line, to receive the radio signal transmitted from the outdoor conversion unit, via wireless communication, and superpose operation data included in the radio signal on the indoor power line, and to convert operation data superposed on the indoor power line into a radio signal for wireless transmission to the outdoor conversion unit;
wherein a unique ID is assigned to each of the outdoor conversion unit and the indoor conversion unit, and the radio signal transmitted from one of the outdoor conversion unit and the indoor conversion unit includes operation data and flag information representing the unique ID, and
wherein each of the outdoor conversion unit and the indoor conversion unit receives and processes the radio signal based on the unique ID assigned thereto.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/601,630Filed 24 Jun 2003
Priority: JP 2002-18231724 Jun 2002
Published: US 2004/0010347 A115 Jan 2004
Granted: 15 Mar 2005
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

F24F 11/62
Control or safety arrangements: characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or…
F24F 11/30
Control or safety arrangements: for purposes related to the operation of the system, e.g. for safety or monitoring
G05B 15/02
Systems controlled by a computer: electric
F24F 11/54
Characterised by user interfaces or communication: using one central controller connected to several sub-controllers