A diffuser assembly includes a first blade pivotably coupled to a housing and configured to rotate about a first axis and includes second blade pivotably coupled to the housing and configured to rotate about a second axis. The diffuser assembly includes a linkage mechanism coupled to the first blade and the second blade and configured to transition between a first configuration and a second configuration. In the first configuration, the linkage mechanism is configured to induce rotation of the second blade about the second axis in a first direction in response to rotation of the first blade about the first axis in the first direction. In the second configuration, the linkage mechanism is configured to induce rotation of the second blade about the second axis in a second direction, opposite the first direction, in response to rotation of the first blade about the first axis in the first direction.

Disclosed is a control method of a ventilation apparatus, the method including: a determination step in which measured outdoor temperature and humidity and the measured indoor temperature and humidity are equal to or greater than a set temperature and a set humidity; and a drying operation step in which, when the outdoor temperature and humidity and the indoor temperature and humidity, reach the set temperature and the set humidity, a first desiccant heat exchanger and a second heat exchanger operate in a dry mode, wherein the first desiccant heat exchanger is provided in a first common passage, through which indoor space air or outdoor space air flows, to absorb or desorb moisture, and the second desiccant heat exchanger is provided in a second common passage, which is separate from the first common passage, and through which indoor air or outdoor air flows, to absorb or desorb moisture in air.

A blade adjustment mechanism and an air circulator. The air circulator includes a housing defining an air outlet, and the air outlet includes an air inlet side and an air outlet side. The blade adjustment mechanism includes: a fixing bracket, fixedly connected with the housing; at least two wind guide assemblies, spaced apart from each other and partially extending into the air outlet, rotationally connected with the fixing bracket; at least two first connecting rods, rotationally connected with the at least two wind guide assemblies located, extension lines of the at least two first connecting rods along length directions of the at least two first connecting rods being configured to intersect; and a second connecting rod, fixedly connected with an end of each of the at least two first connecting rod.

A hygiene management device for an entrance space is proposed. In the hygiene management device, an air discharger for discharging air toward the bottom of an entrance space operates within a predetermined angle range in an entering/exiting direction of a person, and air to be discharged through a discharge hole of the air discharger is guided to an air guide unit. A plurality of vanes are installed in a row in the air guide unit to control the direction of the air to be discharged through the discharge hole.

Disclosed herein is an air conditioner capable of guiding air in a desired direction with an adjusted speed without marring the appearance to solve the above-described problems. An air conditioner comprising a ceiling-embedded type indoor unit configured to discharge air into an indoor room through an air outlet simultaneously sucking indoor air through an air inlet, wherein a air conditioner comprises, a main flap configured to guide a direction of air discharged from a air outlet in a preset direction, and a sub-flap configured to guide the direction of air between the main flap and the sub-flap in the preset direction, wherein a length of a main flap in a direction where air flows is longer than that of the sub-flap in the direction where air flows.

A modular damper system is configured for installation in a ductwork of a building that supplies conditioned air through a register vent of the building and includes a damper unit, a control module and a power module. The damper unit is mountable upstream of the register vent and includes a damper that is movable between a closed position and an open position. The control module includes a controller that provides control commands to the damper unit and includes a housing that is configured to be secured to the ductwork at a position between the register vent and the damper unit. A power module is electrically coupled to the control module to provide power to the control module and includes a housing that is configured to be secured to the ductwork at a position between the register vent and the damper unit.

Systems for controlling louver positions are described herein. Such systems may include: a louver frame; a louver coupled to the louver frame via a rotation member and adapted to rotate at a louver side around an axis of rotation at the rotation member. In one embodiment, the louver includes a spring member engagement feature. The system also includes a spring member coupled to the louver frame and adapted to engage with the spring member engagement feature of the louver and apply a force to the louver when a forward airflow is applied to the louver in a forward airflow direction.

An air conditioning appliance may include a unit enclosure, a housing, a heat exchanger, a compressor, and an access door. The unit enclosure a system compartment. The housing may be received within the system compartment. The heat exchanger may be disposed in the housing. The compressor may be in fluid communication with the heat exchanger to circulate a refrigerant through the heat exchanger. The access door may be attached to the unit wall proximal to the opening through the unit enclosure. The access door may extend between a bottom end and a top end. The access door may define a primary louver set and a secondary louver set in fluid parallel to permit airflow through the access door. The primary louver set may be defined proximal to the bottom end. The secondary louver set may be defined proximal to the top end above the primary louver set.

The present invention is related in general to air circulators, and in particular, to an air circulator with a vein control system to direct and adjust airflow patterns. According to an exemplary embodiment, the present invention provides adjustable, vertical veins that are attached to the outlet of a tower fan. According to a preferred embodiment, the veins are pivotally mounted in such a way that by turning a knob, the veins can either be directed into a focused air-flow pattern or adjusted to a divergent air-flow pattern, or at any setting in between.

Disclosed herein are systems and methods for providing hot air or hot dehumidified air to a facility using an energy recovery high efficiency dehumidification system. The energy recovery high efficiency dehumidification system can include an air filter bank that receives air from a first inlet source, a supply fan that causes the air to flow from the first inlet source, a cooling coil configured to cool and reduce a relative humidity of the air that passes over the cooling coil, a cooling recovery coil coupled with the cooling coil and configured to heat the cooled air to generate cooled dehumidified reheated air in a cooling recovery coil plenum, an equipment room configured to surround mechanical and electrical equipment and further heat received cooled dehumidified reheated air, and a heat rejection coil that rejects heat from one or more components of the mechanical and electrical equipment to further heat the air.