An air conditioner outdoor device isolation structure includes a foot and a vibration isolation member. The foot includes a mounting hole. The vibration isolation member includes a first end part, a connection part, and a second end part connected in sequence, and a connection hole penetrating the first end part, the connection part, and the second end part. The connection part is located in the mounting hole, and the first end part and the second end part are located on opposite sides of the mounting hole.

A damper assembly is configured for placement within a duct of an existing ductwork system, the duct supplies conditioned air through a register boot to a register vent within a room. The damper assembly includes a damper blade that is movable between a closed position and an open position. A damper motor is operably coupled to the damper blade and is configured to move the damper blade between the closed end position and the open end position. A microphone provides an output signal that is representative of sounds sensed by the microphone. A control module is operably coupled to the damper motor and the microphone and is configured to control operation of the damper motor based at least in part on the output signal provided by the microphone.

A method to suppress noise emanating from an electrical power generator including the steps of: receiving sound emanating from the electrical power generator, wherein the sound is received in a duct for cooling air having passed through the generator; analyzing the received sound and, based on the analysis, generating a sound signal which represents a destructive sound to the received sound, and broadcasting a destructive sound into the duct, wherein the destructive sound corresponds to the sound signal.

A ventilation device for an interior of a motor vehicle includes a ducting system with at least one air duct and a blower via which an air flow can be generated in the ducting system. To allow active ventilation of the interior at particularly low noise levels, at least one sound transducer of the ventilation device is provided via which a sound pressure in the ducting system can be detected and a signal corresponding to the sound pressure detected can be transmitted to at least one second sound transducer of the ventilation device. In order to reduce the sound pressure, a counter sound pressure depending on the signal in the ducting system can be generated by the at least one second sound transducer.

The present invention relates to a blower, the blower according to an embodiment of the present invention comprising: a lower case having a suction hole formed therein through which air is introduced; an upper case arranged on the upper side of the lower case and having a discharge hole formed therein through which air is discharged; and a fan arranged in the lower case and including a plurality of blades. Each of the plurality of blades includes a plurality of airfoils respectively extending along different camber lines from one another, and a leading edge of connecting the leading ends of the plurality of airfoils. Entrance angles formed by the respective camber lines of the plurality of airfoils and the rotation directions of the blades are different from one another. Thus, due to the curved shape of the leading edge and the design of a recessed notch, a flow separating from the leading edge is reduced, and thus, there is an advantage in that air volume performance is improved.

An evaporative air cooler is described. The evaporative air cooler includes a housing defining an interior of the evaporative air cooler; a tank positioned adjacent to a top portion of the housing, wherein the tank is configured to receive, store, and release liquid; a mister in fluid communication with the tank, wherein the mister is configured to create a mist from the liquid; a filter structure with a filter, wherein the filter is configured to absorb the mist; a fan configured to draw the air into the interior, wherein the air is cooled by at least one of the mist and the filter, and wherein the fan directs the air through the filter structure and from the interior; and a clip coupled to the housing.

A louver type blast valve making use of an aerodynamically configured blade, independently activated by air flow to block a blast shock wave and a subsequent return suction wave. The blast valve (FIG. 6) including a frame and at least one aerodynamically configured blade, independently activated by air flow to block a blast shock and a potentially following return wave. The aerodynamically configured blade having an elongated shape, including at least a steep convex surface and a flat or shallow concave surface, forming a leading edge and a trailing edge at the intersection of the surfaces. The blade being hinged to the frame about a longitudinal axis passing between the steep convex surface and the flat or shallow concave surface.

A method and system for noise cancellation is disclosed. In one embodiment, the method may include receiving, from a first sensor, a first signal indicative of a noise generated by an equipment. The first sensor may be configured to generate the first signal indicative of the noise generated by the equipment. The first sensor may be positioned in proximity to the equipment. The method may further include generating a noise cancellation signal based on the first signal and triggering a speaker to generate a sound corresponding to the noise cancellation signal, wherein the speaker is positioned in proximity to the equipment.

A measuring system includes a temperature-variable container, an optical device and an air conditioner. The temperature-variable container includes a transparent plate. The optical device includes a first optical sensor unit and a second optical sensor unit. The air conditioner is disposed between the transparent plate and the optical device.

A water splash prevention cap for a floating type humidifier according to an exemplary embodiment of the present invention includes: a body which has therein a vacant space and is coupled to a discharge port of the floating type humidifier; at least one inlet portion which is formed to be opened at a lower circumference of the body to draw humidification particles created by the floating type humidifier; an outlet portion which is formed at an upper side of the body and discharges the drawn humidification particles; and a collision inducing portion which extends from a lower portion of the body in the space portion and induces a collision of some of the humidification particles.