The present disclosure relates to air filters. More particularly, it relates to air filters including pleated filter media that can be uniformly expanded and contracted. In some embodiments, the air filters are adjustably sized air filter systems. In some embodiments, the air filters can be used in a window opening.

An assembly type ventilation device for windows and doors is disclosed. The assembly type ventilation device for windows and doors comprises: a filter frame provided with an insertion part into which an air filter module is detachably inserted and fixed; a first fixing part installed on one side of the filter frame and fixed to a window; and a second fixing part installed on the other side of the filter frame and fixed to a window frame.

The invention relates to an air purification apparatus. The apparatus is disposed in a window for separating an indoor space and an outdoor space. The apparatus comprising: an inlet chamber having a first inlet, a second inlet and an outlet, wherein the first inlet is operatively open to the outdoor space and the second inlet is operatively open to the indoor space; an air pumping unit for pumping air from the inlet chamber to the indoor space through the outlet, wherein the air is pumped into the inlet chamber through the first inlet or through the second inlet; and a filtering unit disposed upstream of the air pumping unit, for filtering pollutants in the air.

The present disclosure relates to air filters. More particularly, it relates to air filters including pleated filter media that can be uniformly expanded and contracted. In some embodiments, the air filters are adjustably sized air filter systems. In some embodiments, the air filters can be used in a window opening.

An energy recovery ventilator door assembly includes an exterior door for a structure, the door including an inside fan and an outside fan for providing flows of air to a manifold. The manifold includes an inside manifold conduit for receiving stale inside air and an outside manifold conduit for receiving fresh outside air. A heat sink between the two conduits recovers heat energy from the warmer flow of air flowing in the conduits and transmits the recovered heat energy to the cooler of the flows of air in the conduits. A crossover element routs the inside conduit from the inside of the door to the outside of the door, and routs the outside conduit of the door to the inside of the door. Thus the air in the inside manifold conduit is vented to the outside of the structure through the door and the air in the outside manifold conduit is vented to the inside of the structure through the door.

The present invention discloses a ventilator with dual flow passages. There is a mode switcher on the partition board. The ventilator has a variety of operating modes, such as, the natural or mechanical driving mode according to outdoor wind speed, and single-effect or multi-effect filtration according to the outdoor air pollution conditions. The single-effect filtration uses only the primary-efficiency filter, while the three-effect filtration uses the primary-, medium-, and high-efficiency filters. The mode switcher on the partition board can open or close the by-pass baffle to bypass or go through the medium- and high-efficiency filters for switching between the single-effect and multi-effect filtration. In case some indoor pollution sources need to be removed quickly, the recirculated indoor air filtration can be run. In such situation, the primary-efficiency filter in the mechanically-driven flow passage is bypassed, while the fan drives indoor air passing the medium- and high-efficiency filters.

The present disclosure relates to air filters. More particularly, it relates to air filters including pleated filter media that can be uniformly expanded and contracted. In some embodiments, the air filters are adjustably sized air filter systems. In some embodiments, the air filters can be used in a window opening.

A purification window embedded with a ventilation system, including: a window frame, and a double-layered glass window unit arranged in the window frame. An outdoor window screen roll and an indoor window screen roll are arranged at a left stile and a right stile, respectively. An upper middle position and a lower middle position of the double-layered glass window unit are respectively in rotational connection with a top rail via an upper shaft and a bottom rail via a lower shaft. The ventilation system includes: an air supply chamber and an exhaust chamber, both of which provided therein with T-shaped air dampers and fans. Both external edges of the outdoor window screen roll and the indoor window screen roll are provided with magnetic tapes configured for fixation connection with the upper shaft and the lower shaft.

A stile and rail frame exterior solid core door brings fresh outside air into a structure horizontally through a ventilator assembly. The ventilator assembly includes an upper housing. The upper housing includes a filter for filtering the fresh air and a fan in a fan housing provides a flow of air into the upper housing and through the filter and into the structure horizontally through the door. Air flow through the housing is controlled by a movable damper in the upper housing. An actuator moves the damper in response to electronic input signals. Stale air is exhausted from the structure in a similar manner, through a fan in a lower housing. The upper and lower housings with their fans extend substantially the width of the door between the stiles. Electronic elements are in a housing in the door, and respond to information appropriately sensed by sensor elements placed in the structure. For new construction, the ventilator assembly may be located in a transom area above the door or may be vertically oriented adjacent to a door or as desired.

A window air conditioner includes a housing including a separation groove dividing the housing into two parts, a mounting base movably mounted in the separation groove, and a sealing member connected with the mounting base. The sealing member is fitted with the mounting base by deformation, and the sealing member is configured to be driven by the mounting base to switch between a storage state and a working state. In the storage state, the sealing member is received in the separation groove. In the working state, the sealing member is at least partially outside the separation groove.