Abstract: A control substrate includes a substrate, a power-supply circuit, a communication circuit, a first terminal block that includes a first wiring connector, a second wiring connector, and a third wiring connector, a second terminal block that includes a fourth wiring connector and a fifth wiring connector, a first pattern, a second pattern, a third pattern, a fourth pattern, a fifth pattern, a sixth pattern, a first switch that is provided in the third pattern and is capable of switching connection and disconnection between the second wiring connector and the communication circuit, and a second switch that is provided in the fifth pattern and is capable of switching connection and disconnection between the fourth wiring connector and the communication circuit.

Abstract: A control substrate includes a substrate, a power-supply circuit, a communication circuit, a first terminal block that includes a first wiring connector, a second wiring connector, and a third wiring connector, a second terminal block that includes a fourth wiring connector and a fifth wiring connector, a first pattern, a second pattern, a third pattern, a fourth pattern, a fifth pattern, a sixth pattern, a first switch that is provided in the third pattern and is capable of switching connection and disconnection between the second wiring connector and the communication circuit, and a second switch that is provided in the fifth pattern and is capable of switching connection and disconnection between the fourth wiring connector and the communication circuit.

Abstract: A relay terminal block fixed to a fixing part by a screw includes a main body having a first surface facing the fixing part, and a second surface on a rear surface side of the first surface. The main body is formed with a recessed portion depressed from the second surface toward the first surface, a through-hole formed from a bottom surface of the recessed portion through to the first surface, and a protrusion that is provided at an edge of the recessed portion to protrude in a direction away from the second surface. The through-hole is formed to have an inner diameter larger than an outer diameter of a shaft of the screw and smaller than an outer diameter of a head of the screw, and the recessed portion is formed to have an inner diameter larger than the outer diameter of the head of the screw.

Abstract: A relay terminal block fixed to a fixing part by a screw includes a main body having a first surface facing the fixing part, and a second surface on a rear surface side of the first surface. The main body is formed with a recessed portion depressed from the second surface toward the first surface, a through-hole formed from a bottom surface of the recessed portion through to the first surface, and a protrusion that is provided at an edge of the recessed portion to protrude in a direction away from the second surface. The through-hole is formed to have an inner diameter larger than an outer diameter of a shaft of the screw and smaller than an outer diameter of a head of the screw, and the recessed portion is formed to have an inner diameter larger than the outer diameter of the head of the screw.

Abstract: An electric component box that accommodates therein an electric component, which includes: a control board that controls an air conditioner indoor unit; a power supply and indoor-outdoor wiring terminal block that is provided on the control board and is connected to a communication wire wired from the air conditioner indoor unit to an air conditioner outdoor unit and is connected to a power wire that supplies power; and a communication-wire terminal block that is provided on the control board and is connected to a communication wire for an external input.

Abstract: An electric component box that accommodates therein an electric component, which includes: a control board that controls an air conditioner indoor unit; a power supply and indoor-outdoor wiring terminal block that is provided on the control board and is connected to a communication wire wired from the air conditioner indoor unit to an air conditioner outdoor unit and is connected to a power wire that supplies power; and a communication-wire terminal block that is provided on the control board and is connected to a communication wire for an external input.

Abstract: A fan includes sloping surfaces arranged at an inner peripheral surface of an air channel portion that are shaped such that an air passage is enlarged in a cross sectional area in a direction normal or substantially normal to a central axis. The inner peripheral surface of the air channel portion also includes a straight surface at which area the distance between the central axis and the inner peripheral surface of the air channel portion is substantially constant. Also, the straight surface of the air channel portion includes a plurality of slits each penetrating the air channel portion.

Abstract: A fan frame includes a first housing having a first end portion in which a first protrusion is arranged, a second housing having a second end portion in which a second protrusion opposing the first protrusion along a specified axis is arranged, the second end portion being in an axially opposing relationship with the first end portion, and a fixing member attached to the first protrusion and the second protrusion to fix the first housing and the second housing together. Further, a first locking portion is arranged in the first end portion and a second locking portion engaging with the first locking portion is arranged in the second end portion.

Abstract: An axial flow fan unit includes a first and a second axial flow fan. The first axial flow fan includes a first motor, a plurality of first lead lines connected to the first motor, a first impeller rotatable about a center axis by the first motor, and a first housing arranged to enclose the first motor and the first impeller, wherein the first housing has a first recess portion extending from an inside to an outside of the first housing. Likewise, the second axial flow fan includes a second motor, a plurality of second lead lines, a second impeller, and the second housing, wherein the second housing has a second recess portion extending from an inside to an outside of the second housing. The first and the second lead lines are led out from the first and the second housings through the first and the second recesses, respectively. Further, the first recess portion is deviated relative to or partially overlapped with the second recess portion along a circumferential direction.

Abstract: An air conditioner controller that can select a temperature sensor to be detected from a plurality of temperature sensors in accordance with at least one of time, date, and day set in a scheduled operation is obtained. A schedule storage portion that stores setting information of the scheduled operation and a control portion that controls an operation of an air conditioner on the basis of the setting information of the scheduled operation are provided, and as the setting information of the scheduled operation, selection information on the selected temperature sensor to be detected and operation setting information including at least information on temperature setting are stored, and the plurality of air conditioners are controlled based on the temperature information of the temperature sensor selected on the basis of the selection information and the information on the temperature setting of the operation setting information.

Abstract: A fan includes sloping surfaces arranged at an inner peripheral surface of an air channel portion that are shaped such that an air passage is enlarged in a cross sectional area in a direction normal or substantially normal to a central axis. The inner peripheral surface of the air channel portion also includes a straight surface at which area the distance between the central axis and the inner peripheral surface of the air channel portion his substantially constant. Also, the straight surface of the air channel portion includes a plurality of slits each penetrating the air channel portion.

Abstract: A fan frame includes a first housing having a first end portion in which a first protrusion is arranged, a second housing having a second end portion in which a second protrusion opposing the first protrusion along a specified axis is arranged, the second end portion being in an axially opposing relationship with the first end portion, and a fixing member attached to the first protrusion and the second protrusion to fix the first housing and the second housing together. Further, a first locking portion is arranged in the first end portion and a second locking portion engaging with the first locking portion is arranged in the second end portion.

Abstract: An axial flow fan unit includes a first and a second axial flow fan. The first axial flow fan includes a first motor, a plurality of first lead lines connected to the first motor, a first impeller rotatable about a center axis by the first motor, and a first housing arranged to enclose the first motor and the first impeller, wherein the first housing has a first recess portion extending from an inside to an outside of the first housing. Likewise, the second axial flow fan includes a second motor, a plurality of second lead lines, a second impeller, and the second housing, wherein the second housing has a second recess portion extending from an inside to an outside of the second housing. The first and the second lead lines are led out from the first and the second housings through the first and the second recesses, respectively. Further, the first recess portion is deviated relative to or partially overlapped with the second recess portion along a circumferential direction.

Abstract: A serial axial fan unit includes first and second axial fans and a spacer arranged therebetween and connected thereto. First and second impellers respectively provided in the first and second axial fans have a diameter in a range from approximately 25 mm to approximately 200 mm, for example. The axial height of the spacer is in a ranged of approximately 1.5 mm to approximately 8 mm, for example. Due to the spacer, the first and second axial fans are spaced apart from each other by an appropriate distance. Thus, a harsh noise caused by interference occurring when air from the first axial fan flows into the second axial fan is reduced. Also, the static pressure to airflow volume characteristics of the serial axial fan for a given sound value is improved.