Exemplary air amplifiers described herein can utilize a high-pressure stream of gas to accelerate a low-velocity stream of gas to provide a high-velocity, high-volume stream of gas. This high-velocity, high-volume stream of gas can generate unwanted noise as the high-velocity, high-volume stream of gas propagates through the air amplifier. The exemplary air amplifiers described herein can include can passively and/or actively suppress, for example, diminish, re-tune, or even completely cancel, the unwanted noise as the high-velocity, high-volume stream of gas propagates through these exemplary air amplifiers. The exemplary air amplifiers described herein can include one or more absorption materials to passively suppress the unwanted noise generated by the high-velocity, high-volume stream of gas. The exemplary air amplifiers described herein can generate multiple noise suppression waves to actively suppress the unwanted noise generated by the high-velocity, high-volume stream of gas. The multiple noise suppression waves can destructively combine with the unwanted noise generated by the high-velocity, high-volume stream of gas to suppress the unwanted noise.

A vehicle including a passenger cabin and a vent assembly is a disclosed. The vent assembly includes a duct for carrying an airflow and having an outlet through which the airflow is discharged into the passenger cabin; a deflector located within the duct, the deflector having a convex surface across which the airflow passes; and a valve extending around at least part of the convex surface for restricting the direction of the airflow across the convex surface. The airflow is discharged through the outlet in a direction defined by the direction of the airflow across the convex surface; and the valve is rotatable to vary the direction of the airflow across the convex surface.

Architectures and techniques are presented that can facilitate improved design and function of certain heating, ventilation, and air conditioning (HVAC) devices. Architectures directed to an improved evase device can be designed with rounded corners that can facilitate, e.g., mitigation of reverse flow that traditionally grows back from corners of a transition from an axial fan to a rectangular duct. Architectures directed to an improved intake device can be designed to limit intake from certain flow directions and to smoothly change flow direction, which can facilitate, e.g., reduction in noise. Architectures directed to an improved fan intake device can be designed to reduce noise without significantly reducing total pressure. Architectures directed to an improved air handler device can be designed to concurrently heat and cool air and to reduce dimensions (e.g., size, weight) that can reduce costs and mitigate shipping and installation difficulties.

A diffusion terminal of clean air includes an outer body, which can be connected to a respective supply channel of clean air. The outer body has an outlet mouth for supplying clean air towards an inhalation area of a person. A first conical element is at least partially hollow arranged inside the outer body, so that an axis of the first conical element is substantially coincident with a main axis of the body. The first conical element has a base portion arranged close to a plane defined by the outlet mouth, so as to provide an outlet of an airflow along a crown defined between an inner surface of the outer body and an outer surface of the first conical element. The first conical element has at least one opening to enable passing of an airflow within the first conical element and through an outlet mouth thereof.

The invention relates to an air exhaust valve (1). The air exhaust valve (1) comprises an inner baffle element (10) located at a radially inside position and an outer baffle element (20) located at a radially outside position and surrounding said inner baffle element (10) for defining an air flow space (70) between said inner baffle element (10) and said outer baffle element (20). There are provided an inner plurality of slits or grooves in said inner baffle element (10) and/or an outer plurality of slits or grooves (21) in said outer baffle element (20).

The invention relates to an air exhaust valve (1). The air exhaust valve (1) comprises an inner baffle element (10) located at a radially inside position and an outer baffle element (20) located at a radially outside position and surrounding said inner baffle element (10) for defining an air flow space (70) between said inner baffle element (10) and said outer baffle element (20). There are provided an inner plurality of slits or grooves in said inner baffle element (10) and/or an outer plurality of slits or grooves (21) in said outer baffle element (20).

A diffuser assembly for a heating, ventilating, and air conditioning (HVAC) system includes a housing having an outer frame and an inner frame disposed within the outer frame. The outer frame includes an inlet configured to receive an air flow. The inner frame forms a first flow path for the air flow through the housing between the outer frame and the inner frame. The inner frame defines a second flow path for the air flow through the inner frame. The diffuser assembly also includes a damper assembly configured to transition between a first configuration to enable discharge of the air flow from the housing via the first flow path and a second configuration to enable discharge of the air flow from the housing via the second flow path.

A diffuser assembly for a heating, ventilating, and air conditioning (HVAC) system includes a housing having an outer frame and an inner frame disposed within the outer frame. The outer frame includes an inlet configured to receive an air flow. The inner frame forms a first flow path for the air flow through the housing between the outer frame and the inner frame. The inner frame defines a second flow path for the air flow through the inner frame. The diffuser assembly also includes a damper assembly configured to transition between a first configuration to enable discharge of the air flow from the housing via the first flow path and a second configuration to enable discharge of the air flow from the housing via the second flow path.

An air diffuser for a heating, ventilation, and/or air conditioning (HVAC) system includes a variable flow adapter including a plurality of nozzles and a damper. The variable flow adapter is configured to receive conditioned air from the HVAC system. The air diffuser also includes an actuator coupled to the damper and configured to actuate the damper between a first configuration and a second configuration. The damper is configured to block the conditioned air from passing therethrough and direct the conditioned air through the plurality of nozzles in the first configuration. Additionally, the damper is configured to open to direct the conditioned air therethrough in the second configuration.

An air diffuser for a heating, ventilation, and/or air conditioning (HVAC) system includes a variable flow adapter including a plurality of nozzles and a damper. The variable flow adapter is configured to receive conditioned air from the HVAC system. The air diffuser also includes an actuator coupled to the damper and configured to actuate the damper between a first configuration and a second configuration. The damper is configured to block the conditioned air from passing therethrough and direct the conditioned air through the plurality of nozzles in the first configuration. Additionally, the damper is configured to open to direct the conditioned air therethrough in the second configuration.