Showing papers on "Bell mouth published in 2021"

Blower and outdoor unit of air conditioner having the same

Abstract: Provided are a blower, capable of suppressing noise occurring in a stator while significantly improving blowing efficiency, and an outdoor unit using the same. The present invention comprises: a bell mouth part (11) spaced apart at a predetermined distance in the radial direction with respect to an outer circumferential end of a propeller fan (FN); and a diffuser part (12) installed on the downstream side of the bell mouth part (11), and having a flow path area which is enlarged from the upstream side toward the downstream side with a larger magnification rate than the magnification rate of the flow path area in the downstream end of the bell mouth part (11); and a stator part (2F) having a plurality of stators (22), wherein the stator part (2F) is arranged within the diffuser part (12).

Blower unit for vehicle, and air conditioning device comprising same

Abstract: An embodiment disclosed herein relates to a blower unit for a vehicle, and an air conditioning device comprising same. The blower unit comprises: a scroll case having a suction port formed therein; a fan rotatably disposed inside the scroll case; a motor having a shaft coupled to the fan; and a bell mouth disposed at the suction port, wherein an inner end of the scroll case forming the suction port is disposed radially apart from the fan so as to form a gap, and the bell mouth prevents air flowing due to the rotation of the fan from flowing backward through the gap. Accordingly, the blower unit for a vehicle, and the air conditioning device comprising same can prevent the backflow of air to the outside of the scroll case through the arrangement of the bell mouth and the scroll case and the structural shape of the bell mouth.

Outdoor unit for air conditioner device

Abstract: This outdoor unit for an air conditioner device comprises a bell mouth having a first tapered part in which the inside diameter on the upstream side from which air flows in is greater than the inside diameter on the downstream side, and a straight pipe part extending downstream in a straight line from the first tapered part. The first tapered part has a first bend part forming an air inflow port, a second bend part having a smaller inside diameter than the first bend part, and a linking part that is continuous from the first bend part and the second bend part and that has an inner surface extending in a straight line. The angle of the inner surface of the linking part with respect to the direction of the axis of the straight pipe part is at least 33°. In the direction of the axis of the straight pipe part, the ratio of the sum of a first length of the first tapered part and a second length of the straight pipe part relative to the total length of the bell mouth is below 0.76.

Axial outlet centrifugal-type blower device with noise reducing space

Abstract: A bladed wheel of a blower device has a main plate, a side plate and multiple fan blades between the main plate and the side plate. A fan casing of the blower device has a bell mouth portion and a guide wall portion, which extends in a radial-outward direction from an axial rear-side end of the bell mouth portion to an outer periphery of the side plate. An air reflecting space is formed in the fan casing at a radial-outside position of the guide wall portion and at an axial front-side position of the fan casing between an axial rear-side end of the guide wall portion and an axial front-end wall portion of the fan casing. Air blown out from the bladed wheel flows through an air blow-out passage, wherein sound wave of the air from the bladed wheel and sound wave of the air from the air reflecting space interfere with each other so that noise is decreased.

Cooling means for exhaust gas

Abstract: Exhaust gas cooling apparatus 10, suitable for cooling high temperature Diesel Particulate Filter (DPF) outflow gases during regeneration, attaches to an exhaust pipe 160 preferably via fins 180 or a bracket (150, fig.3), e.g. when mounting in an engine bay. The apparatus has a tubular shroud body (100, fig.1) having an input end (102, fig.1) and an output end (104, fig.1), the input end having a bell mouth opening 106 (i.e. flared or frusto-conical) that leaves a substantially annular gap (162, fig.3) between the exhaust conduit and the bell mouth opening, the output end has an edge (118, fig.1) which is not perpendicular to its own axis. The Venturi effect causes the gap to draw in colder ambient air. The apparatus has a curved shroud portion (108, fig.1), a turn-down tip, at the output end on which two curved vanes (110, 112, fig.1) are mounted, optionally in slots, forming a diffuser. The curved shroud portion may have a u-shaped cross-section. The apparatus may be constructed from welded stainless steel, or by additive manufacture, or moulding. Uses include vehicles or a stationary machine like a wood chipper.

Indoor unit for refrigeration cycle device and impeller

Abstract: Provided are an indoor unit for a refrigeration cycle device, and an impeller, such that it is possible to efficiently blow air on a heat exchanger and suppress a decrease in heat exchange efficiency. The indoor unit (1) comprises: a heat exchanger (2) that is disposed within a housing (5); a bell mouth (7) that is disposed in the housing (5); and a turbofan (8) that draws air in from the bell mouth (7) and blows the air on the heat exchanger (2). The inner end of the bell mouth (7) is connected to the flat inner surface of the housing (5). The turbofan (8) is equipped with a main plate (31) that spreads radially, and a plurality of blades (32) that protrude from the main plate (31) and are annularly arranged. Each of the blades (32) is exposed, the outermost diameter D1o formed by the blade (32) is larger than the outermost diameter D2 of the main plate (31), and the protruding end of the blade 32 reaches the inner end of the bell mouth (7).