Abstract: Method for controlling an HVAC ventilation fan in heating or cooling mode and varying the fan-off time delay as a function of heat source or cool source operational time. Method for increasing heater ventilation fan speed from the low speed used for heating to the high speed used for cooling. Method for maintaining the heat pump reversing valve signal at the same position throughout the cool or heat source operational and extended variable fan-off time delay. Method for closing economizer dampers at the end of the cool or heat source operational time while continuing to operate the ventilation fan for an extended variable fan-off time delay.

Abstract: Inside a blown-out air duct in the air conditioner through which conditioned air reaches a blowing-out port, there is provided a rectifying box having a air passage therein, for rectifying a flow of the conditioned air toward a predetermined flowing direction in order to prevent any dew condensation at the blowing-out port in the air conditioner. In the meantime, in order to suppress noise, rectifying plates for reducing an inflowing angle of air flowing into the fin tips of a heat exchanger are interposed between an axial fan and the heat exchanger for taking in the air from the axial fan for heat exchanging.

Abstract: An oscillating drive mechanism for an air discharge nozzle, which is mounted for pivotal movement about an axis. The discharge nozzle includes end plates, each having a pivot pin extending along the pivot axis. One end plate has an elongated slot therein spaced from the pivot pin. The pivot pins are supported at opposite ends by support structure, which allows pivotal movement of the nozzle about the axis. The support structure adjacent one end includes an opening therethrough spaced from the axis and configured such that the elongated slot and one end plate will sweep across the opening as the air discharge nozzle pivots through a predetermined desired arcuate sweep. A drive motor having a drive axis is attached on the opposite side of the support structure, opposite the through opening. A drive mechanism is disposed in the opening.

Abstract: A fan convector for heating air enclosed environments, comprising a fan, an intake opening with an air filter, a heat-exchanger for heating the air, and an air outlet; the fan is driven by a first electric motor which is controlled by a thermostat for switching it on/off, the fan convector also comprising a set of elements for deflecting the air flow through the air outlet, the elements being orientable on an axle moved angularly by a second electric motor to a plurality of positions between a closed position and a fully-open position, and the second electric motor being controlled by the thermostat.

Abstract: An air conditioner includes an air inlet, an air outlet, a heat exchanger disposed between the air inlet and air outlet, and an air direction control mechanism at the air outlet for regulating a direction of air discharge. The regulating mechanism includes a support member having slots, and a plurality of vanes each having a projection configured correspondingly to the slots so that once the projections have been inserted through the respective slots and then rotated, the vanes are secured to the support member. Each projection includes a hinge axle about which the vane rotates, and a pair of compression protruders projecting from opposite sides of the hinge axle. The protruders bear elastically against one surface of the support member to pull a flange portion of the vane into engagement with another surface of the support member. One of the protruders of each vane carries a fixation axle which snaps into a respective open-sided hole of a connecting member.

Abstract: An air conditioner includes a manual control panel for enabling a user to select from among a number of operating modes, including respective areas of a room to receive discharged air from the air conditioner. In accordance with the selected mode, there occurs an automatic adjustment of the orientation of air-directing vanes and the speed of an air discharge fan. The vanes can be adjusted to stationary positions, or can be oscillated.

Abstract: In an air conditioner, at least one up-down wind direction board rotates in an up-down direction around almost horizontal rotation axis within an air outlet, and a plurality of lateral wind direction boards rotating laterally are provided around rotation axes as the center which are almost orthogonal to the rotation axis of said up-down wind direction board. Also a diffuser constituting a part of the air outlet is provided rotationally around an almost horizontal rotation axis as the center at the lower portion of the air outlet. A motor for driving the up-down wind direction board is provided at the side of one side wall portion of the air outlet. The up-down wind direction board is set by said motor to any arbitrary angle of tilt between the initial stop position closing said air outlet and maximum open position almost vertically downward.

Abstract: A mechanism for controlling the flow of air from an air-conditioning unit includes a row of guide vanes which are pivotally held by an outlet nozzle. The guide vanes are located at the lower end of an air course which has been formed within a body of the air-conditioning unit. The guide vanes control the flow of air in both left and right directions. This new design is characterized in that the angle of inclination of each guide vane progressively changes toward the end of the row. The air flow is controlled accurately in both the left and right directions so that the air flow reaches the desired location.

Abstract: In an apparatus in which a blow-out nozzle is provided at a lower end of an air course formed in the inside of a body of the air-conditioning equipment and blown air passed through the air course is blown out of a blow-outlet while guided in the left/right direction by a plurality of parallel guide vanes pivotally held by the blow-out nozzle, wherein each vane has a C-shaped annular pivotal bearing and a sleeve fitted into the bearing, a shaft extending from an inner wall of the nozzle being inserted into the sleeve, the shaft having claws which project from the upper end portion of the shaft so as to retain the sleeve.

Abstract: An air conditioner includes an outlet for discharging cool air into a room. The outlet can be closed by a vertically movable shutter. The shutter carries two vertical racks which are selectively engageable by a horizontally shiftable, motor-driven pinion. The pinion, which is rotated in only one direction, displaces the shutter into an outlet closing position when the pinion engages one of the racks, and displaces the shutter in an opposite direction when the pinion engages the other rack. Horizontal shifting of the pinion can be performed by tripping jaws which are formed on the racks and are engageable with the pinion, or by a separate device such as a fluid-actuated cylinder.

Abstract: An air vent includes a louver blade mounted in a housing for rotation about an axis. A motor output shaft is connected to a driving link to rotate the driving link about the axis. A driven link in the form of a crank arm extends from the driving link to the louver blade. A spring in the form of a torsional coil spring interconnects the driving link and the driven link for transmitting rotation therebetween to adjust the louver blade. When an undesired external force is applied to the louver blade, the spring can yield elastically to prevent relative movement between the driving link and driven link in order to protect the motor.