Air-conditioning apparatus

Abstract

An air-conditioning apparatus includes a heat exchanger, a fan, and a controller. The heat exchanger causes heat exchange to be performed between a medium that transfers heat, and air. The fan sends air to the heat exchanger. The controller determines whether clogging due to foreign matter has occurred in the heat exchanger, based on a command voltage varying in accordance with the rotation speed of a fan motor that drives the fan.

1 . An air-conditioning apparatus comprising:
 a heat exchanger configured to cause heat exchange to be performed between a medium and air, the medium being a medium to transfer heat;   a fan configured to send the air to the heat exchanger; and   a controller configured to determine whether clogging due to foreign matter has occurred in the heat exchanger, based on a command voltage varying in accordance with a rotation speed of a fan motor that drives the fan, wherein,   in response to determining that the command voltage sent to the fan motor is equal to or greater than a set clogging determination threshold for a set time after start of operation of the air-conditioning apparatus, the controller determines that the clogging due to foreign matter has occurred.   
     
     
         2 . (canceled) 
     
     
         3 . An air-conditioning apparatus comprising:
 a heat exchanger configured to cause heat exchange to be performed between a medium and air, the medium being a medium to transfer heat;   a fan configured to send the air to the heat exchanger; and   a controller configured to determine whether clogging due to foreign matter has occurred in the heat exchanger, based on a command voltage varying in accordance with a rotation speed of a fan motor that drives the fan, wherein, in response to determining that a rate of increase of the command voltage during execution of operation of the air-conditioning apparatus is equal to or greater than a set increase rate determination threshold, and that an increased state of the command voltage after the increase stops continues for a set duration, the controller determines that the clogging due to foreign matter has occurred.   
     
     
         4 . An air-conditioning apparatus comprising;
 a heat exchanger configured to cause heat exchange to be performed between a medium and air, the medium being a medium to transfer heat;   a fan configured to send the air to the heat exchanger; and   a controller configured to determine whether clogging due to foreign matter has occurred in the heat exchanger, based on a command voltage varying in accordance with a rotation speed of a fan motor that drives the fan; wherein   the controller determines whether the clogging due to foreign matter has occurred based on a comparison between the command voltage sent during execution of operation of the air-conditioning apparatus and the clogging threshold being set based on a rate of increase of the command voltage associated with frosting.   
     
     
         5 . The air-conditioning apparatus of  claim 1 , comprising
 a display device configured to display information based on a signal,   wherein, in response to determining that the clogging due to foreign matter has occurred, the controller transmits the signal to the display device to display an indication that the clogging due to foreign matter has occurred.   
     
     
         6 . The air-conditioning apparatus of  claim 1 , wherein the controller further determines, based on the command voltage, whether frosting has occurred.