Abstract: A dehumidifying apparatus includes first, second, and third heat exchangers; moisture adsorbing material; a fan to force air through the first heat exchanger, the moisture adsorbing material, the second heat exchanger, and the third heat exchanger; a compressor having a discharge side connected to the third heat exchanger; and an expansion valve configured to reduce the pressure of a refrigerant condensed by the first heat exchanger or the second heat exchanger. The third heat exchanger has a fin pitch smaller than a fin pitch of the first heat exchanger and a fin pitch of the second heat exchanger. The third heat exchanger is smaller than the first heat exchanger and the second heat exchanger. This arrangement provides a small, low-cost dehumidifying apparatus.

Abstract: A dehumidifier includes a compressor, a flow path switch, a first heat exchanger, a pressure-reducing device, a second heat exchanger, a moisture adsorption member that is arranged between the first heat exchanger and the second heat exchanger, a fan, a storage unit configured to store an operation time map, and a temperature and humidity detection unit. The controller controls the flow path switch that switches a first operation mode to adsorb moisture by the moisture adsorption member and a second operation mode to desorb moisture adsorbed by the moisture adsorption member. The controller acquires a first time and a second time corresponding to the temperature and humidity detected by the temperature and humidity detection unit from the operation time map, and controls the flow path switch in accordance with the acquired first time and second time.

Abstract: A dehumidification device according to the present invention includes an operation control unit configured to switch between thermo-on for circulating refrigerant in a refrigerant circuit and thermo-off for suspending circulation of the refrigerant, and an operation mode control unit configured to switch an operation mode to any one of a first operation mode in which a moisture adsorption unit is caused to adsorb moisture and a second operation mode in which moisture retained in the moisture adsorption unit is caused to be desorbed. The operation mode control unit is configured to select the operation mode at a time when the thermo-on is switched from the thermo-off in response to the operation mode and a relative humidity of air in switching from the thermo-on to the thermo-off.

Abstract: In a dehumidifying apparatus, a third heat exchanger functioning as a condenser is configured to be smaller than at least one of a first heat exchanger and a second heat exchanger.

Abstract: A dehumidification device according to the present invention includes an operation control unit configured to switch between thermo-on for circulating refrigerant in a refrigerant circuit and thermo-off for suspending circulation of the refrigerant, and an operation mode control unit configured to switch an operation mode to any one of a first operation mode in which a moisture adsorption unit is caused to adsorb moisture and a second operation mode in which moisture retained in the moisture adsorption unit is caused to be desorbed. The operation mode control unit is configured to select the operation mode at a time when the thermo-on is switched from the thermo-off in response to the operation mode and a relative humidity of air in switching from the thermo-on to the thermo-off.

Abstract: A dehumidifier includes: a refrigerant circuit in which a compressor, a flow path switch that switches a refrigerant flow path, a first heat exchanger, a pressure-reducing device and a second heat exchanger are connected by piping; a moisture adsorption member that is arranged between the first heat exchanger and the second heat exchanger; a fan configured to cause air to flow in order of the first heat exchanger, the moisture adsorption member and the second heat exchanger; a controller configured to control the flow path switch; a storage unit configured to store the operation time map; and a temperature and humidity detection unit configured to detect temperature and humidity in a space to be dehumidified. The controller controls the flow path switch that switches a first operation mode to adsorb moisture by the moisture adsorption member and a second operation mode to desorb moisture adsorbed by the moisture adsorption member.