An incubator comprises an incubator chamber defined by a bottom part and a top casing covering a bed area of the bottom part. The incubator comprises an air treatment and circulation device for treating air and circulating it through the chamber, said air treatment and circulation device including a ventilator. The air treatment and circulation device is connected to chamber inlet openings which are arranged along one or more sides of said bed area, allowing treated air to flow from the treatment and circulation device into the chamber. The air treatment and circulation device furthermore is connected to at least one chamber outlet opening allowing air to flow out from the chamber to the treatment and circulation device. The air flows in the incubator are routed such that noise is reduced and no high air flow speeds occur near the infant in the incubator.

Disclosed is a ceiling type air conditioner that can implement a horizontal air flow to provide an indirect wind to a user with a simple structure. To this end, the ceiling type air conditioner according to the present disclosure includes an inner case in which a blower and a heat exchanger are built-in, and a blow passage for guiding air passed through the heat exchanger downward is formed; an inner flow path body which is disposed below the inner case and has a suction flow path for sucking air into the inner case so as to communicate vertically; and an outer flow path body which is spaced outward from the inner flow path body and disposed below the inner case, and forms a discharge flow path, between the inner flow path body, communicating with the blow passage; wherein an outer circumferential surface of the inner flow path body comprises a first concave portion formed to be concave, a first horizontal portion extended horizontally outwardly from a lower end of the first concave portion, and a vertical portion extended vertically downwardly from an outer end of the first horizontal portion.

A ventilation device, in particular for heating, cooling and/or humidifying air in residential buildings, includes a duct-shaped housing (1) with an air inlet opening (2) and an air outlet opening (3), and a fan impeller (6) as well as a filter unit, heat exchange unit and/or heating coil unit (14) arranged in the main flow direction (Z) of an air flow generated by the fan impeller (6). An air guiding device (17) is arranged in the flow direction (Z) of the air flow in front of a suction nozzle (16)configured as a flow conditioner, includes a bar structure with air guiding bars-such that a flow inlet opening is configured on the suction side at an axial height in front of the flow inlet opening (15) by the bar structure whose opening surface is smaller than the opening surface of the flow inlet opening (15).

The present invention provides a steady flow structure and a ventilation apparatus having the steady flow structure. The ventilation apparatus comprises: a hood arranged indoors, an inner chamber of the hood constituting a work chamber; and a front wall of the hood formed with a front opening which opens towards the indoor environment; an air supply duct, which supplies air into the work chamber through air supply outlets provided on the hood and extending in the left and right width direction of the work chamber; and an air exhaust duct, through which the air entering the work chamber through the front opening and the air entering the work chamber through the air supply outlets are exhausted from the work chamber to outside; a steady flow structure is provided in the interior of the air supply duct, supply airflow enters into the steady flow structure in the left-right directions, and then blows out evenly and stably along the air supply outlets located along the sides of the steady flow structure after flowing through the steady flow structure. The ventilation apparatus provided by the present invention solves the problems of directionless, turbulent and chaotic airflow blown out of air supply outlets which exist with ventilation apparatus in prior art, and reduces the working noise levels that exist in ventilation apparatus in prior art.

Due to the low suction strength or an unsuitable positional relationship or distance between the suction feed and the oral cavity, conventional extra-oral intake devices exhibit the problem of not being able to fully suck particulate matter and droplets from teeth, shavings from repair products, saliva, bacteria, blood, rinse water, tooth surface cleaning agents, etc., that are dispersed to outside the oral cavity during practice. In order to improve suction strength, the present invention provides an intake device that is equipped with a protruding airflow-regulating member, the top of which is oriented in the direction in which the fluid flows into the opening part of the suction feed, and that can efficiently suck dispersed particulate matter and droplets within a wide range.

An air treatment system includes a carbon dioxide sensor located in a conditioned space and providing a signal based on detection of an amount of carbon dioxide in the conditioned space; a control system to receive the signal from the carbon dioxide sensor, determine an air flow setting based on the amount of carbon dioxide, and provide a control signal to an air handler based on the air flow setting; and multiple-orifices that create an array of a plurality of air outlets to receive forced air from the air handler and that are substantially parallel to each other and configured to convert a substantially turbulent air flow inside of an air duct into a substantially laminar flow into the conditioned space, wherein the plurality of air outlets are defined by an array of a plurality of passages through a honeycomb structure that are substantially parallel to each other.

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.

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 noise-reducing valve structure includes a unitary spindle-shaped body having a central lumen for receiving a fluid flow and a poppet member, the body having an inner diameter adjacent the central lumen and an outer diameter and a circumferentially and axially distributed plurality of radial passages adapted to be opened and closed in accordance with a guided position of the poppet member, the plurality of radial passages extending through the spindle-shaped body from the inner diameter to the outer diameter and having a gradually increasing area from the inner diameter to the outer diameter.

An improved airflow delivery system (1) comprising an air moving element (3) configured to move air in a flow path, a chamber (19) in the flow path configured to receive product (9), an air transfer chamber (11) comprising an inlet (10) of a selected area for receiving air in the flow path in a first direction (x-x) and an outlet (14) of a selected area greater than the area of the inlet for discharging air in the flow path in a second direction (y-y) different from the first direction, an airflow divider (33) extending across the air transfer outlet and configured to divide airflow in the flow path, an airflow directional (15) extending across the flow path downstream of the airflow divider and upstream of the chamber, the airflow directional having an upstream inlet face (28a) and a downstream outlet face (29c) and configured to receive airflow at the inlet face and split the airflow into multiple separated sub-paths (27) within the flow path and to discharge the airflow from the downstream outlet face substantially parallel to the flow path and without substantial reduction in static pressure.