JP3365327B2 - Ceiling fan - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceiling fan for cooling and heating and for minimizing a vertical temperature difference. 2. Description of the Related Art In cooling and heating, the blowing of warm air in winter is
Due to the high temperature, it spreads flat near the ceiling, and the living environment of people does not warm up. In addition, the cool air blows out in summer, because of the low temperature and large specific gravity, the cold wind just below the outlet is strong and uncomfortable. [0003] In order to solve this problem, conventionally, during cooling, cold air is spread to the vicinity near the ceiling and naturally falls due to the difference in specific gravity. [0004] In addition, at the time of heating, warm air that tends to stagnate at the upper portion is forcibly blown down near the floor to warm the living environment. A conventional ceiling fan can blow down warm air near the ceiling downward during winter heating, but is useless during summer cooling. Cold air goes straight in the direction of the air outlet and downwards, and the draft feels unpleasant. Therefore, it is effective only in an uncooled room. SUMMARY OF THE INVENTION It is an object of the present invention to provide a ceiling fan that lowers hot air directly below and disperses cool air horizontally. SUMMARY OF THE INVENTION A feature of the present invention is a blade having a plurality of elongate surfaces coupled to a substantially vertical axis and rotating in a desired rotational direction in a substantially horizontal plane; Coupling means for coupling the shaft to the shaft, the coupling means supporting the blade rotatably at a position off the center axis in the width direction of the blade, and the blade axis of the blade according to the rotation direction of the blade. First and second stoppers for controlling rotation about the blade are provided for each blade, and the first stopper is inclined with respect to a horizontal plane and a vertical plane when the blade rotates in a first direction. And the second stopper is positioned by the stopper when the blade rotates in a second direction opposite to the first direction with the surface of the blade substantially vertical. It is on the ceiling fan in the position to be done. The above-mentioned ceiling fan is attached to or near the outlet of the ceiling, and cool air is scattered horizontally to the surroundings, and naturally lowered by the difference in specific gravity of air to create a comfortable space. [0009] Preferably, the second stopper and the blade axis are substantially on a vertical line. The first stopper is, for example, a line connecting the first stopper and the blade axis is 3
It is in the range of 0 ° to 60 °, preferably at 45 °. FIG. 1 shows a ceiling fan. A rotating shaft (1) of a ceiling fan is provided near the center of the hot and cold air outlet. This rotating shaft may be a low-rotation motor having a large number of poles, or may be rotated at a low speed by an inverter, or decelerated by a gear. Alternatively, a fixed rotation speed may be used in accordance with the air volume. In order to reverse the rotation direction in summer and winter, the rotation direction is reversed in conjunction with the air conditioner or manually by switching the wiring. For the three-phase motor, three-wire phase conversion is used.For a single-phase motor, start and end of coil winding are drawn out in a total of four points, and it can be reversed by using a switch box for contact switching. Omitted. The rotating shaft (1) rotates the blade shaft box (2). A blade (4), whose inclination can be changed about the blade shaft (3), is attached to the blade shaft box (2) so as not to come off. The blade (4) stops vertically and symmetrically with respect to the blade axis (3), and stops at the position (10) in FIG. During rotation, it receives much wind pressure, but stops at a certain position supported by stoppers (5, 6). During heating, the rotating shaft (1) rotates counterclockwise when viewed from below, that is, rotates in the direction of (8), and the blade (4) maintains a certain angle by the winter blade stopper (5). Blow down warm air toward. During cooling, the rotating shaft (1) turns clockwise as viewed from below (in the direction of (9)), and the wind pressure causes the blade (4) to turn slightly clockwise about the blade shaft (3) for summer use. Stopping at the stopper (6), the blades (4) are substantially vertical and the cool air is scattered around. According to the present invention, a single ceiling fan scatters cool air to the surroundings in summer and sends warm air downward in winter. Therefore, the cool air spreads around and improves its distribution, and then naturally descends without draft. In addition, the warm air is sent downward to provide a comfortable living environment with a small vertical temperature difference. As described above, the downward wind for lowering the warm air and the horizontal wind for dispersing the cool air are supplied to the blade stoppers (5, 6).
There was no other example of a simple method of reversing the rotation axis, and the room's vertical temperature was drastically reduced, realizing energy saving and a comfortable environment. This is particularly effective where there is room space and ceiling height. Depending on the size of the room and the height of the ceiling, it is also possible to make the blades (4) wide in the form of a fan with low rotation by an inverter or the like.

[Brief description of the drawings] FIG. 1 is a perspective view of a ceiling fan. FIG. 2 is a side view of a ceiling fan. FIG. 3 is a diagram showing a flow of air in a room. [Explanation of symbols] 1 Rotary axis 2 blade shaft box 3 blade shaft 4 feathers 5 Winter stopper 6 Stopper for summer 7 Rotation angle of summer and winter (represented in Fig. 2) 8 heating direction 9 Cooling rotation direction 11 heating and cooling room 12 Cold and hot air outlet 13 Rotary motors such as motors 14 Flow scattered by the blade (4) during cooling 15 Downflow with the blade (4) during heating

Claims (1)

(1) A blade having a plurality of elongated surfaces coupled to a substantially vertical axis and rotating in a desired rotational direction in a substantially horizontal plane, and the blade and the shaft are coupled. Coupling means for supporting the blade rotatably at a position off the center axis in the width direction of the blade, and rotating the blade around the blade axis in accordance with the rotation direction of the blade. A first stopper and a second stopper for controlling movement of each blade, wherein the first stopper is provided at a position oblique to a horizontal plane and a vertical plane when the blade rotates in a first direction. The second stopper is located at a position positioned by the stopper when the blade rotates in a second direction opposite to the first direction, the surface of the blade being positioned substantially vertically by the stopper. Ceiling fan characterized by the fact that there is.