Air Conditioner

Abstract

When an infrared ray transmitting and receiving part of an indoor unit receives a command signal for turning on ventilating operation from a wireless remote controller, information of the on-state of the ventilating operation is stored in a first EEPROM of the indoor unit and a second EEPROM of an outdoor unit. By starting up an air blower in a humidifying unit and switching a switchover damper connected to a ventilation pipe, indoor air is discharged to the outside of the room or outdoor air is taken into the room. When the ventilating operation is once stopped by power failure, the ventilating operation resumes on the basis of the information of the on-state of the ventilating operation stored in the first EEPROM after recovery from the power failure. The disadvantage that the ventilating operation stops though no command for turning off the ventilating operation has been received from the operator can be prevented.

1 . An air conditioner comprising: 
 a ventilating part ( 6 ) that ventilates a room;    a first nonvolatile memory ( 11 ) that stores operation information representing an operating state of the ventilating part ( 6 ) at a previous time of operation; and    a control part ( 7 ) that controls operation of the ventilating part ( 6 ) on a basis of operation information stored in the first nonvolatile memory ( 11 ) at a present time of operation.    
   
   
       2 . The air conditioner as claimed in  claim 1 , comprising: 
 an indoor unit ( 1 ) having the first nonvolatile memory ( 11 ), a receiving part ( 13 ) that receives a command signal for commanding the operating state of the ventilating part ( 6 ) and a transmitting part ( 13 ) that transmits an operation information signal representing the operation information stored in the first nonvolatile memory; and    a remote controller ( 3 ) having a transmitting part ( 31 ) that transmits the command signal and a receiving part ( 31 ) that receives the operation information signal.    
   
   
       3 . The air conditioner as claimed in  claim 2 , comprising: 
 an outdoor unit ( 2 ) having a second nonvolatile memory ( 23 ) that stores the operation information of the ventilating part ( 6 ) at the previous time of operation.    
   
   
       4 . The air conditioner as claimed in  claim 2 , wherein the remote controller ( 3 ) comprises: 
 a third nonvolatile memory ( 33 ) that stores the operation information of the ventilating part ( 6 ) at the previous time of operation, and    the transmitting part ( 31 ) transmits the operation information signal that represents the operation information stored in the third nonvolatile memory ( 33 ) to the indoor unit ( 1 ).    
   
   
       5 . The air conditioner as claimed in  claim 1 , wherein, 
 when the receiving part ( 13 ) of the indoor unit does not receive the command signal for commanding execution of ventilation of the ventilating part ( 6 ) at the present time of operation and the operating state of the ventilating part ( 6 ) at the previous time of operation represented by the operation information stored in the first nonvolatile memory ( 11 ), the second nonvolatile memory ( 23 ) or the third nonvolatile memory ( 33 ) is execution of ventilation, the control part ( 7 ) controls the operation of the ventilating part ( 6 ) on a basis of the stored operation information so that the operating state becomes identical to the operating state at the previous time of operation.