| 摘要 |
PROBLEM TO BE SOLVED: To perform defrosting efficiently in a short time. SOLUTION: A refrigerant circuit 3 coupling an outdoor heat exchanger 1 with an indoor heat exchanger 2 is provided with a compressor 4 and a four- way valve 5. A pair of extending/shrinking curtain 16 disposed in front and rear of the outdoor heat exchanger 1 are coupled with a timing belt 20 wound around a pair of vertical pulleys 19. The lower pulley 19 is coupled through a gear mechanism 22 with a drive motor 23 and a control section 13 comprising a microcomputer controls an electric heater 10 and the drive motor 23 based on a detction signal from a temperature detector 12. |
