Abstract: A humidity control apparatus performs a humidification operation in which outdoor air is supplied to the inside of a room through a moisture-desorption adsorption heat exchanger serving as a condenser and room air is discharged to the outside through a moisture-absorption adsorption heat exchanger serving as an evaporator. The humidity control apparatus includes a preheat heat exchanger which, in the humidification operation, is positioned upstream of the moisture-desorption adsorption heat exchanger in the flow of outdoor air in an air passage and serves as a condenser to heat outdoor air in a refrigerant circuit, and a heat-recovery heat exchanger which, in the humidification operation, is positioned downstream of the moisture-absorption adsorption heat exchanger in the flow of room air in the air passage and serves as an evaporator to recover heat from room air in the refrigerant circuit.

Abstract: A humidity controlling ventilator includes: an air flow rate calculator configured to calculate an air volume flow rate of an air blowing fan based on a specific volume of air located downstream of an adsorption heat exchanger and an air mass flow rate of the air blowing fan; and an air blow controller configured to control the air blowing fan such that the air volume flow rate calculated by the air flow rate calculator approaches a predetermined target air volume flow rate.

Abstract: A ventilation system includes a connection determinator configured to determine that N-th, second, and sixth humidity controlling ventilation devices are connected to an identical second duct bank in a situation where when fans of the second and sixth humidity controlling ventilation devices are driven, and the rotational speed of a fan of the N-th humidity controlling ventilation device is changed, a power detector detects fluctuations in the power consumed by the fan of each of the second and sixth humidity controlling ventilation devices.

Abstract: An air blower apparatus is provided including a hub which is a center of rotation, and a plurality of blades disposed along an outer peripheral surface of the hub and having leading and trailing edges and where both an outer peripheral end of the leading edge and an outer peripheral end of the trailing edge lie ahead relative to the rotative direction. An outer peripheral part of the blade may be bent toward the suction side in such a way as to form a starting point at which an airflow starts leaking, and the radial-direction width, W, of the bent part gradually increases from the vicinity of the leading edge to the vicinity of the trailing edge. A blade tip vortex (?) generated from a blade positioned ahead relative to the rotational direction F and a separation vortex from a pressure surface of a blade positioned behind relative to the rotational direction F offset each other, so that discharge vortexes are suppressed.

Abstract: Disclosed is an air blower apparatus comprising a hub (14) which is a center of rotation, and a plurality of blades (13, 13, 13) disposed along an outer peripheral surface of the hub (14) and having leading and trailing edges (13a) and (13b) wherein both an outer peripheral end of the leading edge (13a) and an outer peripheral end of the trailing edge (13b) lie ahead relative to the rotative direction. An outer peripheral part (13c) of the blade (13, 13, 13) is bent toward the suction side in such a way as to form a starting point at which an air flow starts leaking, and the radial-direction width, W, of the bent part gradually increases from the vicinity of the leading edge (13a) to the vicinity of the trailing edge (13b).