An air-conditioning indoor unit is operable in a Coanda effect use mode in which blown air from a blow-out port is diverted in a predetermined direction. The indoor unit includes a scroll leading conditioned air to the blow-out port, a Coanda vane in proximity to the blow-out port, and a controller controlling orientation of the Coanda vane. The Coanda vane alters an airflow direction of the blown air via the Coanda effect and turns the blown air into a Coanda airflow along a bottom surface of the Coanda vane. A convex shaped curved surface formed in the bottom surface of the Coanda vane has a radius of 50 to 300 mm. The controller adjusts the orientation of the Coanda vane away from a casing front surface as the Coanda vane separates from the blow-out port in the Coanda effect use mode.

Air-conditioning indoor unit

A fan rotor blade includes a blade body constructed of a composite material, a blade root integrally formed at a base end of the blade body by the composite material, and a sheath attached to a leading edge of the blade body so as to extend in a span direction. The sheath includes a sheath main body and a pair of joint flanges, and is segmented into a sheath base segment and a sheath top segment. The sheath top segment smoothly continues from the sheath base segment, and has a longer length than a length of the sheath base segment along a span direction. A sheath length of the sheath main body at an assumed impact position that is a radially outermost position on the sheath top segment to be contacted with an obstacle suctioned into the engine case is not shorter than 10 %chord and not longer than 60 %chord. A sheath length of the sheath along an end edge of the fan rotor blade is not shorter than 40 %chord. The fan rotor blade possesses sufficient impact resistance and can be simplified and light-weighted.

Fan rotor blade and fan

PROBLEM TO BE SOLVED: To allow an indoor unit body to be thinner and smaller in the case of making the indoor unit body as thin as possible by disposing, for example, small laminated heat exchangers having high heat exchanging efficiency on right and left sides of a centrifugal fan and blowing air sucked from a front face side center part forward from air blowout ports on right and left sides. SOLUTION: The indoor unit for an air conditioner is equipped with a box-shaped indoor unit casing 1, air inlets 5 provided in the front face center part of the indoor unit casing 1, a pair of right and left air outlets 7 provided on right and left sides in the front face of the indoor unit casing 1, a pair of air paths 6 provided on the inside of the indoor casing 1 and leading from the air inlets 5 to the pair of right and left air outlets 7, common fans 8 positioned on the upstream side of each of the pair of air paths 6 and provided so as to correspond to the respective air inlets 5, and a pair of heat exchangers 9 provided at the downstream side of the pair of air paths 6 to correspond to the respective right and left air outlets 7. COPYRIGHT: (C)2009,JPO&INPIT

Indoor unit for air conditioner

An impeller for blower comprising blades (15), notches (17) formed in the side edge of each blade (15) at predetermined intervals, and a plurality of smooth sections (18) formed between adjacent notches (17). Large-scale transverse swirls discharged from the side edges of the blades (15) are divided into by longitudinal swirls formed in the notches (17) smaller transverse swirls, which are organized in a small scale and stabilized, whereby aerodynamic noises are reduced.

Impeller for blower and air conditioner having the same

PURPOSE: To reduce a defrosting time almost without reducing a room temperature in a defrosting operation by providing an air conditioner with means for correcting the opening of an electronic expansion valve in accordance with a difference between the temperature of an indoor heat exchanger and an inlet air temperature CONSTITUTION: The temperature of an indoor heat exchanger 5 detected by a sensor 17 and an inlet air temperature detected by a sensor 18 are inputted to the heating capacity calculating means 32 of a controller 30 The heating capacity calculating means 32 calculate a deviation between both the temperatures, namely, the heating capacity of an indoor heat exchanger 5 and the output of the means 32 is inputted to expansion valve opening correcting means 29 when inputted with a command from defrosting command means 31, the expansion valve opening correcting means 29 correct an expansion valve opening determined by expansion valve opening determining means 26 in accordance with an input from memory means 33 A corrected opening is outputted to an electronic expansion valve 4 via output means 28 and the electronic expansion valve 4 takes the corrected opening By increasing the opening of the electronic expansion valve 4 according to an increase in the heating capacity of the indoor heat exchanger 5, a defrosting time can be reduced to some extent almost without reducing a room temperature COPYRIGHT: (C)1991,JPO&Japio

Heat pump type air conditioner

PROBLEM TO BE SOLVED: To provide a turbofan capable of inhibiting a separated flow near a leading edge of a blade and inhibiting a pressure loss of airflow and noises, and to provide an indoor unit of an air conditioner using it. SOLUTION: The blade 23 disposed between a hub plate and a shroud is formed in a manner that an inlet angle at the leading edge is gradually decreased from a hub plate side to a shroud side. The leading edge 24a, 24b of the blade 23 can be formed to bring inflow angles γh, γs of the airflow close to the inlet angles at the positions and the airflow enters a flow path between the blades in almost no collision with the blades 23. A separated flow is thus inhibited near the leading edge of the blade 23. COPYRIGHT: (C)2007,JPO&INPIT

Turbofan and indoor unit of air conditioner using it

PROBLEM TO BE SOLVED: To provide a centrifugal blower capable improving blowing performance, etc., and an air conditioner capable of realizing high heat exchange performance by providing the centrifugal blower without causing the enlargement of an operating noise and the enlargement of the height, etc. SOLUTION: An axial flow impeller 30 is approximately coaxially arranged in an inner perimeter of the shroud 3 of the centrifugal impeller 1 to integrate these. A rotor 11 is installed in the centrifugal impeller 1, and a coil body 12 printed with a plurality of coils 13 on a base 14 is arranged so that the coils 13 face each projection 11b of the rotor 11 to form a motor 10 for rotationally driving the centrifugal impeller 1 and the axial flow impeller 30 integrally with the rotor 11 and the coil body 12. Thereby, since the hub 2 is made in a disc shape, and the motor 10 is not present in a suction side of the axial flow impeller 30, uniformity effect in a wind speed distribution of suction flow with the axial flow impeller 30 is exerted to the utmost limit to obtain the centrifugal blower which is low at blowing noise, and excellent in energy saving and quiet operability. COPYRIGHT: (C)2005,JPO&NCIPI

Centrifugal blower and air conditioner using it

PROBLEM TO BE SOLVED: To reduce air noise by smoothing air suction flow from a blade outer peripheral edge, in an impeller for propeller fan. SOLUTION: In this impeller, the pressure surface of a blade 3 is curved so that thickness of the blade 3 may be gradually reduced from a maximum thickness part toward a hub outer peripheral surface 4a after the thickness once increases from a blade outer peripheral edge 3e toward an impeller center Q in each curve or a straight line L 1 which can be obtained by connecting points in which the ratio of a length of a blade camber at each radius location of the blade 3 and a distance from a blade front edge 3c on the blade camber is made the same for each ratio. By constituting the impeller in this way, centrifugal flow based on centrifugal force according to revolution of the impeller 2 is suppressed and a deflection action to the blade outer peripheral edge 3e for air sucked in the vicinity of the blade front edge 3c and the front edge side end part 3h of the blade outer peripheral edge 3e is reduced as much as possible. Thus, leakage flow to a negative pressure surface 3a side in the outer peripheral part of the pressure surface is reduced and work in a portion in the vicinity of a hub 4 on the side of a blade rear edge 3d is promoted. Therefore, aerodynamic performance of a fan is improved and aerodynamic noise is reduced. COPYRIGHT: (C)1998,JPO

Impeller for propeller fan

PROBLEM TO BE SOLVED: To provide a heat exchanger module of uniform blowout air speed and small blasting noise by combining a piezoelectric fan and a heat exchanger, and to provide an outdoor machine and an indoor machine for an air conditioner. SOLUTION: This heat exchanger module is constituted by connecting a plurality of heat exchange units U respectively composed of the piezoelectric fan 1 composed of a pair of piezoelectric elements 2, 2 and a thin plate-shaped blade 3 held between the piezoelectric elements 2, 2 and being reciprocated and vibrated, and the heat exchanger 4 mounted at an air blowout side of the piezoelectric fan 1. Whereby in this heat exchanger module, the air flow W blown out from the blade 3 composing the piezoelectric fan 1, becomes the approximately straight flow not having a rotating component, and is passed through the heat exchanger 4 at a uniform passing air speed. COPYRIGHT: (C)2005,JPO&NCIPI

Shimei Tei

Papers

Indoor unit for air conditioner

Turbofan and indoor unit of air conditioner using it

Centrifugal blower and air conditioner using it

Impeller for propeller fan

Heat exchanger module, and outdoor machine and indoor machine for air conditioner