Daikin Industries, Ltd.

Zuozhou Chen

Kaname Maruyama

Anan Takada

Tomohiro Ishibashi

Hironobu Teraoka

Masafumi Uda

Satoshi Nakai

Tooru Iwata

Masahito Higashida

Hideshi Tanaka

Shinsuke Harada

Ryusuke Otaguro

A bell mouth includes a circumferential wall, and a pressure changing component permeable portion arranged in the circumferential wall at a location where a separated distance from an axial fan is minimal. A fan unit includes the bell mouth, an axial fan, and a case that accommodates the axial fan and the bell mouth. The fan unit has an air layer between the circumferential wall of the bell mouth and the case.

Bell mouth and fan unit

A propeller fan includes a blade configured to rotate around a predetermined rotation axis, and a ring connected to a blade end of the blade. The blade includes a curved portion on a side on which the blade end is located. The curved portion has, in a rotational radial direction of the blade, a cross-sectional shape projecting in a convex manner toward a side on which a pressure surface is located. In the curved portion, when a height from a position of a blade root on a camber line in a direction along the predetermined rotation axis is an axial-direction height and a position at which the axial-direction height becomes maximum in the rotational radial direction is a maximum curve position, the axial-direction height at the maximum curve position is maximum on a side on which a trailing edge of the blade is located.

Propeller fan and refrigeration apparatus

A propeller fan includes a hub rotatable about an axis, and a plurality of blades extending radially outward from an outer peripheral surface of the hub. A ring surrounds the plurality of blades and is connected to each blade tip. A maximum camber location is on a camber line where a distance from a chord line to the camber line in an arc-shaped cross section of each blade about the axis is maximum. An axial height is from a trailing edge to the camber line in a direction along the axis. Each blade has a first portion provided inside in the radial direction of rotation and whose axial height at the maximum camber location is substantially constant, and a second portion provided outside in the radial direction of rotation and whose axial height at the maximum camber location increases toward the blade tip.

Propeller fan

A control device causes an air conditioning apparatus to execute a temperature adjustment operation of causing a first temperature to approach a first target temperature at a target time point and causing a second temperature to approach a second target temperature at the target time point. The first temperature is a surface temperature of a partition portion including at least one of a floor, a wall, and a ceiling facing a target space. The second temperature is an indoor temperature of the target space.

Control device for air conditioning apparatus, air conditioning system, control method for air conditioning apparatus, and program

This indoor unit of an air conditioner includes an indoor unit main body having an inlet and an outlet; a heat exchanger; and a cross-flow fan configured to blow out air, which has undergone heat exchange by the heat exchanger. The cross-flow fan has a blow-out flow path that is configured such that a cross-sectional area gradually increases downward, with the blow-out flow path guiding blown-out air to the outlet. When a distance in the lower wall from an intersection, where a tangent inscribing a tongue of the cross-flow fan orthogonally intersects the lower wall, to a lower end of the indoor unit main body is referred to as distance L, a ratio (L/D) of the distance L to outer diameter D of an impeller of the cross-flow fan is less than 0.05. At least part of the blow-out flow path is formed to project out of the outlet at least when air conditioning operation is performed.

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Osaka, Japan

Zuozhou Chen