Abstract:
An air conditioner has a flow directing vent comprised of slanted vanes. The vent is driven by a drive mechanism which oscillates the vent about an axis. The drive mechanism includes a motor driven shaft which rotates continuously in one direction, and a mechanism for converting such continuous rotation into oscillation of the vent. The drive connection between the vent and drive mechanism can be manually disconnected by axial displacement of the vent, to enable the rotational position of the vent to be adjusted relative to the drive mechanism.

Description:
BACKGROUND OF THE INVENTION 
     The invention relates to an air flow direction adjusting apparatus of a single unit air-conditioner. 
     In most cases, the conventional air flow direction adjusting apparatus of an air conditioner comprises a plurality of vertical air flow direction plates mounted at one end of an outlet vent which automatically directs the air flow direction to the right side or the left side of the outlet vent. Further, at the rear of the vertical air flow direction plates a plurality of horizontal air flow direction plates are mounted for the manual adjustment of the air flow direction towards the upper side or the lower side of the outlet vent. 
     However, in the above conventional apparatus, if a single motor is employed, the air flow is directed to only the right side or to the left side depending on the setting of the automatic air flow directional adjustment. In the event that an automatic succession of adjustments of the air flow direction toward the upper, lower, right and left side is required, the above apparatus has the problem that more than one motor is required. Further, the range of air flow adjustments of the discharged air is limited to four directions; the upper, lower, right, and left side. Thus, the air flow is repeatedly directed to one limited place. That creates another problem in that it requires a long time to reach the desired level of air conditioning. Excessive electric power consumption is necessitated, and the efficiency of the air conditioning is decreased. 
     SUMMARY OF THE INVENTION 
     The present invention has been made in consideration of the prior art. 
     One object of the invention is to provide an air flow direction adjusting apparatus which achieves the maximum efficiency of the air flow so that the various directions of the air flow are repeatedly changed and then returned to the starting point, i.e. a predetermined point, in order to achieve an even distribution of the air. 
     Another object of the invention is to provide an air flow direction adjusting apparatus which can adjust the air flow in a full circular range direction by a single adjusting apparatus. 
     According to an aspect of the present invention, the air flow direction adjusting apparatus of the present invention includes an air outlet vent having a plurality of slanted air flow direction plates for directing the air flow, a support means provided adjacent to the rear surface of the outlet vent for facilitating the rotational movement and the forward or backward movement of the outlet vent, and a clockwise rotational power transmission means for driving the outlet vent in a continuous clockwise or counter clockwise direction. 
     Further, the outlet vent comprises a rim that houses the air flow direction plate. The rim provides first and second coaxial driven members which have different diameters. 
     Further, the power transmission means comprises a first and a second driving member which rotate in the same direction, and an intermediate power transmitter which engages with either the first driven member or the second driven member and the first driving member or the second driving member for rotating the rim in the opposite rotational direction of the power driving member. 
     Further, the first and the second power driving members on the same driving shaft provide, respectively, the first driving member drives the vent when the second driving member does not drive the vent, and the second driving member drives the vent when the first driving member does not drive the vent. 
     Furthermore, the intermediate power transmitter comprises a pinion. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a schematic view of an air conditioner having the air flow direction adjusting apparatus of the present invention, 
     FIG. 2 is a schematic perspective view of the air flow direction adjusting apparatus, 
     FIG. 3 is a partial longitudinal sectional view of an air conditioner having the air flow direction adjusting apparatus, 
     FIG. 4 is a front elevational view of the air flow direction adjusting apparatus in a clockwise rotation, and 
     FIG. 5 is a front elevational view of the air flow direction adjusting apparatus in a counterclockwise rotation. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT 
     In FIG. 1, a single unit air conditioner comprises a body 1 housing an indoor heat exchanger and an outdoor heat exchanger which are not shown. In the front of the indoor heat exchanger a front cover 2 is provided which is constructed of an inlet vent 3 and an outlet vent 41 which constitute an air flow direction adjusting apparatus of the present invention. The size of the inlet vent 3 is formed to be approximately the same as that of the indoor heat exchanger. Adjacent to the inner rear surface of the indoor heat exchanger, a fan (not shown) is installed. The fan draws indoor air through the inlet vent 3 and discharges the heat exchanged air through the outlet vent 41 toward the area to be air-conditioned. 
     In FIGS. 2 and 3, the air flow direction adjusting apparatus 4 comprises the outlet vent 41 provided at the inner rear surface of the front cover 2 which can rotate in a full 360 degree circle, a support means 42 provided adjacent to the inner rear surface of the outlet vent 41 for accommodating forward and backward movements of the outlet vent 41 as well as the rotation thereof, and a power transmission means 43 for rotating the outlet vent 41 in either a clockwise or a counterclockwise direction, or alternatively, within a predetermined arc degree. 
     The outlet vent 41 provides a circular body 41A comprising a first driven gear 412 and a second driven gear 413 which are coaxial with the rim. The diameter of the first driven gear 412 is smaller than that of the second driven gear 413. Along the front of the circumference of the first driven gear 412 a circular groove 411 is provided which is engaged slidingly with a circular projecting part 21. The projecting part 21 is located at the edge of the opening 2A which is formed at the front cover 2. The projecting part 21 serves as a guide track to enable the outlet vent 41 to rotate and also to freely move forward and backward. At the center portion of the rim 41A, a plurality of slanted air flow directional vanes or plates 414 are located and positioned in one direction. Across the middle front edge of each directional plate 414 a knob 415 is attached for adjusting the air flow direction. A rotation rod 416 is attached to the rear surface of the outlet vent 41 along the central axis thereof. Along the outer circumference of the first driven gear 412 and that of the second driven gear 413 cogs (gear tooth) for more effective power transmission are provided. 
     The support means 42 is provided with a support cap 421 and a support rod 422 formed integrally with the body of the support cap 421. The support cap 421 has a hollow body with one end opened, in which the rotation rod 416 of the outlet vent 41 is inserted in a coaxial manner. In the hollow body of the support cap 421, a spring 423 is positioned so as to continuously push the rotation rod 416 forward toward the front cover 2. The support rod 422 is mounted detachably on the horizontal bracket 11. 
     The power transmission means 43 has a driving motor 431 which is mounted detachably on a vertical wall 11A which extends at an angle from a bracket 11. A rotation shaft 431A of the motor 431 extends forward, on which the hub 435 is located. Along the outer surface of the hub 435 two driving gears are formed to comprise a first fan shaped gear 433 and a second fan shaped gear 434, located a predetermined distance from each other. The second gear 434 directly engages with the second driven gear 413 while the first gear 433 indirectly engages with the first driven gear 412. The means for employing the indirect engagement is a pinion 432, which is mounted on the lower rear face of the front cover 2 by shaft 432A. The arc of the first driving gear 433 is located in the opposite direction of the arc of the second driving gear 434 as shown in FIG. 2, i.e., the arcs of the gears 433, 434 are offset by 180 degrees relative to each other. The first driving gear 433 comes into contact with the first driven body 412 while the second driving gear 434 is not in contact with the second driven gear 413, and vice versa. 
     According to the above structure, the air flow direction in respect to the air flow direction plate 414 of the outlet vent 41 is achieved because the outlet vent 41 can be adjusted toward the place the air is desired. In FIG. 3, the knob 415 is pushed as shown in a dotted line and the rotation shaft 416 compresses the spring 415 in the support cap 421, and thus the first driven gear 412 disengages from the pinion 432. In this condition, the user can rotate the outlet vent 41 to an any desired position and the air flow direction can thus be adjusted so as to direct the air where it is needed. After the air flow direction is determined, the outlet vent 41 is repositioned due to the force of the spring 423 such that the first driven gear 412 engages with the pinion 432. 
     When the first driving gear 433 engages with the first driven gear 412 via the pinion 432, and as motor 431 operates, the rotation shaft 431A rotates in a clockwise direction as shown in FIG. 4. The first driven gear 412 moves in a clockwise direction and the outlet vent also rotates in a clockwise direction within a contacting range of the first driving gear 433. After the first driving gear 433 and the pinion 432 become disengaged, the second driving gear 434 starts to engage with the second driven gear 413 of the outlet vent 41 as shown in FIG. 5. As the rotation shaft 431A rotates in a clockwise direction such that the second driving gear 434 moves in the same direction, the second driven gear 413 moves in a counterclockwise direction. After the second driving gear 434 and the second driven gear 413 become disengaged, the first driving gear 433 starts to reengage with the first driven gear 433 via the pinion 432 as shown in FIG. 4. 
     As the clockwise and counterclockwise direction of the outlet vent is repeatedly performed as described above, the body 41 oscillates back and forth about the axis of the rod 416 and the heat-exchanged air is directed to the place as determined by the user. The present invention thereby saves energy due to the minimum time required of the air conditioning operation, and also due to the greater efficiency of the air condition operations. 
     The present invention is not restricted to the above embodiment, but the present invention can also be such that the pinion is located between the second driving gear and the second driven gear.