| 摘要 |
<p>A dehumidifying air-conditioning apparatus comprises a pressurizer (4) for raising a pressure of a refrigerant, a condenser (5) for condensing the refrigerant to heat a high-temperature heat source fluid, and an evaporator (1) for evaporating the refrigerant to cool process air to a temperature lower than its dew point. A first heat exchanging portion (21) is disposed in a refrigerant path between the condenser (5) and the evaporator (1) for evaporating the refrigerant under an intermediate pressure between the condensing pressure of the condenser (5) and the evaporating pressure of the evaporator (1) to cool the process air by evaporation of the refrigerant under the intermediate pressure. A second heat exchanging portion (22) is disposed in the refrigerant path between the condenser (5) and the evaporator (1) for condensing the refrigerant under an intermediate pressure between the condensing pressure of the condenser (5) and the evaporating pressure of the evaporator (1) to heat the process air by condensation of the refrigerant under the intermediate pressure. The first heat exchanging portion (21), the evaporator (1), the second heat exchanging portion (22) are connected in the order named by paths (30, 31, 32, 33, 34). The refrigerant path extends alternately through the first heat exchanging portion (21) and the second heat exchanging portion (22) to form evaporating sections (61a through 61e) in the first heat exchanging portion (21) and condensing sections (62a through 62g) in the second heat exchanging portion (22). The last condensing section (62e through 62g) in the second heat exchanging portion (22) has a larger heat transfer area than the last evaporating section (61d, 61e) in the first heat exchanging portion (21).</p> |
