| 摘要 |
PURPOSE:To reduce ventilating resistance in a ventilation passage by providing a ventilation heat recovery unit case at a primary side of a ventilation passage of an air conditioner heat exchanger with a cross-sectional area larger than that of a ventilation heat recovery unit case at a secondary side. CONSTITUTION:A ventilation heat recovery unit case 150 arranged in a ventilation passage of a heat exchanger for an air conditioner is provided at a primary side of a ventilation passage with a larger cross-sectional area than at a secondary side of the ventilation passage. Both sides of the ventilation heat recovery unit case 150 is diagonally cut in the lower region so that the ventilation heat recovery unit case 150 is formed in a shape tapering toward a direction of air flow. The ventilation passage at the secondary side of the ventilation heat recovery unit 150 is provided with a larger cross-sectional area by the diagonal cut so that the ventilation resistance in the ventilation passage of the air conditioner heat exchanger is reduced. |
