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US 2001/0032474 A1Published application
Communication control system for air conditioner
AssigneeSanyo Electric Co., Ltd.
InventorsSeiji Nakajima, Takaharu Tenma, Eiji Oohashi
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AssigneeSanyo Electric Co., Ltd.
InventorsSeiji Nakajima, Takaharu Tenma, Eiji Oohashi
Estimating the term…
In a communication control system for an air conditioner including an outdoor unit, plural indoor units and control equipment such as a remote controller, etc. which is connected to each indoor unit through a communication line, data communication being carried out between each indoor unit and the control equipment through the communication line, each indoor unit is equipped with a communication control device having a power source circuit 59 to which a power source voltage is supplied from a main power source, a communication superposing circuit for superposing communication data on the power source voltage, a transistor 54 for ON/OFF-controlling the supply of the power source voltage from the main power source to the communication superposing circuit, and a polarity coincidence circuit 63A that passes the output of the communication superposing circuit therethrough to the communication line and depolarizes the power source voltage from the external. Even when an indoor unit functioning as a power supply source cannot supply power due to some trouble, another indoor unit is automatically selected as a power supply source so that the power supply operation can be continuously carried out in the air conditioner.
A communication control system for an air conditioner including at least one outdoor unit, plural indoor units and control equipment such as a remote controller, etc. which are connected to one another through a communication line to mutually carry out data communication through said communication line, characterized in that at least two indoor units of said plural indoor units are equipped with power supply means, and non-polarized and bi-directional data communication is carried out between said plural indoor units and said control equipment while said power supply means of any one of said at least two indoor units supplies a power source voltage of a main power source to said communication line to said control equipment.
A communication control system including plural first units each having a power supply function of supplying a power source voltage and at least one second unit having no power supply function which are connected to one another through a communication line and through which the power source voltage and communication data are transmitted/received in a non-polarized and bi-directional style through said communication line among said first and second units, characterized in that each of said first units has a voltage detecting unit for detecting whether the power source voltage exists on said communication line after a main power source is switched on, and a power source voltage judging and supplying unit for making itself function as a power supply source to supply the power source voltage to said communication line if it is judged by said voltage detecting unit that no power source voltage exists on said communication line after a first predetermined time elapses from the switch-on time of the main power source.
A communication control system for an air conditioner including plural indoor units and at least one outdoor unit, each indoor unit and control equipment containing a remote controller being connected to each other through a communication line, characterized in that all said indoor units and said control equipment perform non-polarized and bi-directional data communication while a power source voltage is applied from any one of said plural indoor units to said control equipment.
Dependencies are inferred from the claim text.