Disclosed is a portable airflow accessory for temperature control of a room, which provides efficient directed airflow of conditioned air from a small air conditioning (AC) unit toward a location selected by a user. The airflow accessory comprises a flexible conduit including a plurality of segments, including a first segment having an air inflow aperture, and second segment having an air outflow aperture. The flexible conduit has attached thereto, adjacent to the air inflow aperture, at least a portion of a fastener that allows the flexible conduit to be removably attached to an air outflow vent of a room AC unit. The airflow accessory further comprises a fan disposed within the flexible conduit at a junction of the first segment and the second segment, to facilitate movement of air introduced into the air inflow aperture through the flexible conduit towards the air outflow aperture

Disclosed is a portable airflow accessory for temperature control of a room, which provides efficient directed airflow of conditioned air from a small air conditioning (AC) unit toward a location selected by a user. The airflow accessory comprises a flexible conduit including a plurality of segments, including a first segment having an air inflow aperture, and second segment having an air outflow aperture. The flexible conduit has attached thereto, adjacent to the air inflow aperture, at least a portion of a fastener that allows the flexible conduit to be removably attached to an air outflow vent of a room AC unit. The airflow accessory further comprises a fan disposed within the flexible conduit at a junction of the first segment and the second segment, to facilitate movement of air introduced into the air inflow aperture through the flexible conduit towards the air outflow aperture

A mechanism for opening and closing a damper valve of a diffuser mechanism is provided. Embodiments of the invention include a damper construction that selectively alters the amount of air flow through a diffuser grille using a three-plate damper valve. The three-plate damper valve includes a manual plate, a fixed plate, and a motorized plate. The manual plate is manually rotatable around a central axis, while the motorized plate is mechanically rotatable about the same axis. The motorized plate is mechanically and/or remotely controlled using a stepper motor coupled to the motorized plate. Further, the diffuser mechanism includes a sensor for determining the location of the motorized plate with respect to a starting position. As such, multiple configurations of the manual plate and the motorized plate may be used to alter the air flow through the resulting channels of the damper mechanism.

A mechanism for opening and closing a damper valve of a diffuser mechanism is provided. Embodiments of the invention include a damper construction that selectively alters the amount of air flow through a diffuser grille using a three-plate damper valve. The three-plate damper valve includes a manual plate, a fixed plate, and a motorized plate. The manual plate is manually rotatable around a central axis, while the motorized plate is mechanically rotatable about the same axis. The motorized plate is mechanically and/or remotely controlled using a stepper motor coupled to the motorized plate. Further, the diffuser mechanism includes a sensor for determining the location of the motorized plate with respect to a starting position. As such, multiple configurations of the manual plate and the motorized plate may be used to alter the air flow through the resulting channels of the damper mechanism.

A heating, ventilation, and air-conditioning (HVAC) duct system which includes, at least in part, one or more modular, uniform, pre-manufactured duct elements having a uniform takeoff on one or more sides for connecting to a run to be connected to an air diffuser at the end. Each of the modular duct elements may include a built-in hanger support element so that the engineer merely has to design a very simple modular run of duct elements without unnecessary computations requiring different duct sizes. It also makes it simple and uniform for installing on site.

A heating, ventilation, and air-conditioning (HVAC) duct system which includes, at least in part, one or more modular, uniform, pre-manufactured duct elements having a uniform takeoff on one or more sides for connecting to a run to be connected to an air diffuser at the end. Each of the modular duct elements may include a built-in hanger support element so that the engineer merely has to design a very simple modular run of duct elements without unnecessary computations requiring different duct sizes. It also makes it simple and uniform for installing on site.

A dynamic air supply system for controlling ventilation in a clean room, wherein the clean room comprises a clean area subject to contamination, comprising a radiant panel arranged within a ceiling above the clean area, a first air supply diffuser and a second air supply diffuser arranged within the ceiling, a controller coupled with the air supply diffusers for controlling the air supply. The first air supply diffuser and the second air supply diffuser are arranged on opposite sides of the radiant panel. The first air supply diffuser and the second air supply diffuser are arranged to diffuse air flows along the radiant panel and towards clean area. The controller is configured to change the air supply diffusers between nursing mode and normal mode, wherein the supply air volume in normal mode is 10%-65% of the supply air volume in nursing mode.

A dynamic air supply system for controlling ventilation in a clean room, wherein the clean room comprises a clean area subject to contamination, comprising a radiant panel arranged within a ceiling above the clean area, a first air supply diffuser and a second air supply diffuser arranged within the ceiling, a controller coupled with the air supply diffusers for controlling the air supply. The first air supply diffuser and the second air supply diffuser are arranged on opposite sides of the radiant panel. The first air supply diffuser and the second air supply diffuser are arranged to diffuse air flows along the radiant panel and towards clean area. The controller is configured to change the air supply diffusers between nursing mode and normal mode, wherein the supply air volume in normal mode is 10%-65% of the supply air volume in nursing mode.

An indoor live ammunition shooting range facility system includes a ventilation facility installed in an indoor live ammunition shooting range, and configured to ventilate air of the indoor live ammunition shooting range; a targeting device facility installed in the indoor live ammunition shooting range, and configured to provide a shooting target; a bulletproof facility installed to protect components exposed to an inside of the indoor live ammunition shooting range among components configuring the ventilation facility and the target device facility and to protect a wall surface of the indoor live ammunition shooting range; a bullet head recovery facility installed on a side opposite to a shooting position, and configured to recover a bullet head; and a control facility installed in the indoor live ammunition shooting range, and configured to control the ventilation facility, the target device facility and the bullet head recovery facility.

An indoor live ammunition shooting range facility system includes a ventilation facility installed in an indoor live ammunition shooting range, and configured to ventilate air of the indoor live ammunition shooting range; a targeting device facility installed in the indoor live ammunition shooting range, and configured to provide a shooting target; a bulletproof facility installed to protect components exposed to an inside of the indoor live ammunition shooting range among components configuring the ventilation facility and the target device facility and to protect a wall surface of the indoor live ammunition shooting range; a bullet head recovery facility installed on a side opposite to a shooting position, and configured to recover a bullet head; and a control facility installed in the indoor live ammunition shooting range, and configured to control the ventilation facility, the target device facility and the bullet head recovery facility.