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.

Description

TECHNICAL FIELD [0001] The present invention relates to air conditioners, and in particular, to an air conditioner having a ventilating part that ventilates a room. BACKGROUND ART [0002] Conventionally, there is disclosed an air conditioner, in which an indoor unit and an outdoor unit are connected with each other via a ventilation pipe, and one end of the ventilation pipe is connected to the inlet side and the outlet side of an air blower provided for the outdoor unit switchably by means of a damper (JP 2003-176944 A). [0003] In the conventional air conditioner, the ventilation pipe is connected to the inlet side of the air blower, and the air blower takes in indoor air via the ventilation pipe and the indoor unit and discharges the air to the outside of the room in a first switch position of the damper. On the other hand, in a second switch position of the damper, the ventilation pipe is connected to the outlet side of the air blower, and the air blower supplies the outdoor air to...

AI Technical Summary

Benefits of technology

[0008] It is an object of the present invention to provide an air conditioner capable of preventing the disadvantage that the ventilating operation stops though no command of stopping the ventilating operation has been received from the operator.

[0013] According to the above construction, when the ventilating part was in the operating state at the previous time of operation, the operation of the ventilating part is controlled to the operating state by the control part at the present time of operation on the basis of the operation information that is the operation information stored in the first nonvolatile memory and represents the operating state. For example, by controlling the ventilating part so that the operating state becomes identical to the operating state at the previous time of operation even when the ventilating operation stops due to, for example, power failure, the ventilating operation can be resumed at the present time of operation after recovery from the power failure. Therefore, the disadvantage that the ventilating operation stops though no command for stopping the ventilating operation has been received as in the conventional case can be prevented.

[0018] Moreover, the operation information signal that represents the operation information stored in the first nonvolatile memory of the indoor unit is transmitted by the transmitting part of the indoor unit. The operation information signal is received by the receiving part of the remote controller. Therefore, since the remote controller can obtain the information identical to the operation information stored in the first nonvolatile memory of the indoor unit even when the operating state is set back to the initial state due to, for example, replacement of the battery of the remote controller, the operation information can be prevented from differing between the remote controller and the indoor unit. Therefore, the disadvantage that the command signal of the initial state is transmitted from the remote controller set back to the initial state to the indoor unit and the operation of the ventilating part stops though no command of stopping the ventilating operation is inputted to the remote controller can be prevented.

[0028] As described above, the air conditioner of the present invention includes the ventilating part that ventilates the room, the first nonvolatile memory that stores the operation information representing the operating state of the ventilating part at the previous time of operation, and the control part that controls the operation of the ventilating part on the basis of the operation information stored in the first nonvolatile memory at the present time of operation. Therefore, even when the ventilating operation stops due to, for example, power failure, the ventilating operation can be resumed at the present time of operation after recovery from the power failure. Therefore, the disadvantage that the ventilating operation stops after recovery from power failure as in the conventional case can be prevented.

Problems solved by technology

However, in a case where power failure occurs while the ventilating operation is performed, the conventional air conditioner enters a stop state even if the power failure is recovered and sometimes fails in returning to the ventilating operation before the power failure.

However, there is a problem that the conventional air conditioner, which sometimes stops the ventilating operation though it has not received the command of stopping the ventilating operation by the operator as described above, is therefore not able to function as a mechanical ventilation facility provided by Building Standard Law.

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