(57) [summary] [purpose] eliminate the occurrence of dew in the indoor unit of the air conditioner. [Configuration] Figure is a side view showing the inside of the indoor unit. A suction port 4a, 4b of the indoor air, and an air filter 7 to the air passage 6 which connects the outlet 5 of the air, the heat exchanger 8 And, there is a blower 9. Heat exchanger 8 is divided into three parts, Its at the bottom there is a dew receiving grooves 11 and 12 for receiving dew condensation water flowing down from the heat exchanger 8 during the defrosting operation. Dew receiving groove A plurality of ribs 17 inside the 12 in contact with the bottom of the heat exchanger 8 The example is provided by 50mm intervals, and are prevented from flowing to the bottom of the waterway 15 together in a short time is dew condensation water flowing down from the heat exchanger 8. It is possible to prevent dew condensation occurring on the inside of the air passage 6 as the temperature difference between the inside and outside of the side wall 14 of the air passage 6 is smaller if condensed water flow down them gradually.
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