Importance

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Abstract

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), and the second heat exchanging portion (22) are connected in the order named by paths (30, 31, 32, 33, 34). A first restriction (1) is disposed on the refrigerant path (42) at the upstream side of the heat exchanging portion (21). A second restriction (12) is disposed on the refrigerant path (43) at the downstream side of the heat exchanging portion (22). The throttling effect of the first restriction (11) is larger than that of the second restriction (12).

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First Claim