A humidifying unit humidifies a target space, and includes an adsorption member haying moisture adsorption and release areas, a heater that heats the moisture release area, fans to generate an air flow, a housing, an electric component including a heat generating component, and a cooler to air-cool the heat generating component. The housing accommodates the adsorption member, the heater, and the fans. The housing has a humidifying air path through which air taken from outside the housing by the fans is discharged outside the housing via the adsorption member, and a cooling air path in which the to cooler is disposed and air taken from outside the housing by the fans is joined with the humidifying air path. A route of air passing through the humidifying air path from the cooling air path and being discharged outside the housing does not pass through the moisture adsorption area of the adsorption member.

There is provided a dehumidifying device for dew point temperature adjustment that adjusts a dew point temperature of air to a temperature of about −20° C. or lower, the device including an adjusting unit that adjusts a dew point temperature by adjusting at least one driving operation that is selected from a rotational frequency of a supply fan for supplying air into the dehumidifying device for dew point temperature adjustment, a rotating speed of a dehumidifying rotor, an opening degree of a blow-out air volume adjustment damper, a rotational frequency of an exhaust fan for exhausting air, and an opening degree of an exhaust air volume adjustment damper.

Outside air is cooled and dehumidified by a pre-cooler to pass through an adsorption zone of a carbon dioxide adsorbing rotor, producing air having a low carbon dioxide concentration which is cooled by an intercooler. The air that has passed through the intercooler is passed through an adsorption zone of a moisture adsorption rotor and then supplied to a low humidity working chamber. Return air from the low humidity working chamber may be mixed with the air leaving the pre-cooler. A part of the air which passed through the intercooler is branched to pass through a purge zone of the moisture adsorption rotor before being sent to a regeneration zone of the humidity adsorption rotor. Air that passed through the regeneration zone of the humidity adsorption rotor is mixed with outside air and then passed through a regeneration zone of the carbon dioxide adsorption rotor before being exhausted.

There is provided a dehumidifying device for dew point temperature adjustment that adjusts a dew point temperature of air to a temperature of about 20 C. or lower, the device including an adjusting unit that adjusts a dew point temperature by adjusting at least one driving operation that is selected from a rotational frequency of a supply fan for supplying air into the dehumidifying device for dew point temperature adjustment, a rotating speed of a dehumidifying rotor, an opening degree of a blow-out air volume adjustment damper, a rotational frequency of an exhaust fan for exhausting air, and an opening degree of an exhaust air volume adjustment damper.

An air-conditioning system includes: a dehumidifying unit configured to mix air discharged from an environmental testing chamber with outside air for dehumidification and to discharge dry air; a dry air thermal controlling unit configured to thermally control the dry air discharged from the dehumidifying unit to have a temperature lower than a preset air temperature inside the environmental testing chamber; and a dry air heating unit configured to heat the dry air thermally controlled by the dry air thermal controlling unit up to the preset air temperature and to supply the dry air to the environmental testing chamber. The dehumidifying unit preferably discharges the dry air having a dew point temperature of 30 C. or less.

An air conditioning apparatus comprises an inlet module, an airflow guiding module, a hygroscopic wheel a dehumidification heating module and an internal recirculation heating module. The airflow guiding module includes an air channel switching unit, an outflowing air channel in air communication with an external environment outside of an air-conditioning environment, and an inflowing air channel in air communication with the air-conditioning environment. The air conditioning apparatus of the present invention meets various requirements for air conditioning. In addition, when the air conditioning apparatus performs a dehumidification process, the hygroscopic wheel and the dehumidification heating module is applied to remove the moisture of the air conditioning flow of the inflowing air channel, and thus the relative humidity of the air-conditioning environment is directly reduced so as to increase the dehumidifying efficiency.

Outside air is cooled and dehumidified by a pre-cooler to pass through an adsorption zone of a carbon dioxide adsorbing rotor, producing air having a low carbon dioxide concentration which is cooled by an intercooler. The air that has passed through the intercooler is passed through an adsorption zone of a moisture adsorption rotor and then supplied to a low humidity working chamber. Return air from the low humidity working chamber may be mixed with the air leaving the pre-cooler. A part of the air which passed through the intercooler is branched to pass through a purge zone of the moisture adsorption rotor before being sent to a regeneration zone of the humidity adsorption rotor. Air that passed through the regeneration zone of the humidity adsorption rotor is mixed with outside air and then passed through a regeneration zone of the carbon dioxide adsorption rotor before being exhausted.

A dehumidifying air handling unit for an HVACR system includes a housing, a desiccant wheel, and a cooling heat exchanger. A main airflow path extending through the housing from an air inlet to and air discharged outlet of the housing. The desiccant wheel includes a first end and a second end that are each disposed in the main airflow path and a metal organic framework desiccant that is moved between the first end and the second end. A desiccant wheel includes a metal organic framework desiccant disposed on a surface of the desiccant wheel. Rotation of the desiccant wheel moves a position of the surface between a first end and a second end of the desiccant wheel. The metal organic framework desiccant has an majority absorption-desorption operating band of 25% relative humidity or less.

Disclosed is a temperature-based adaptive dehumidification system for an air-conditioning environment, including: a temperature sensing device provided to sense temperature of the air-conditioning environment to obtain environmental temperature information; a humidity sensing device provided to sense humidity of the air-conditioning environment to obtain environmental humidity information; and a dehumidifying device which obtains a referenced humidity range which corresponds to the obtained environmental temperature information by means of a calculation in reference to a predetermined reference relationship of temperature-humidity. A controller performs a comparison between the obtained environmental humidity information and the referenced humidity range thereby, and when the obtained environmental humidity information is not within the referenced humidity range, enables the dehumidifying device to perform a dehumidifying process for the air-conditioning environment so as to automatically regulate humidity to the most appropriate degree for the user according to environment temperature.

An air conditioning apparatus comprises an inlet module, an airflow guiding module, a hygroscopic wheel a dehumidification heating module and an internal recirculation heating module. The airflow guiding module includes an air channel switching unit, an outflowing air channel in air communication with an external environment outside of an air-conditioning environment, and an inflowing air channel in air communication with the air-conditioning environment. The air conditioning apparatus of the present invention meets various requirements for air conditioning. In addition, when the air conditioning apparatus performs a dehumidification process, the hygroscopic wheel and the dehumidification heating module is applied to remove the moisture of the air conditioning flow of the inflowing air channel, and thus the relative humidity of the air-conditioning environment is directly reduced so as to increase the dehumidifying efficiency.