JP2009300024A - Air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner with a stabilizer capable of sufficiently fulfilling the potential of a cross flow fan. <P>SOLUTION: The air conditioner is at least provided with the cross flow fan 7 and the stabilizer 6, and a recessed part 5 is provided in the position of the stabilizer 7 opposing to the cross flow fan 7. Due to this structure, a circular vortex formed by the cross flow fan 7 is sucked to the stabilizer 6 side. Thus, since an actual flow passage formed by excluding a circular vortex part from a flow passage surrounded by the stabilizer 6 and a rear guider 8 is widened, air blowing performance can be improved and the potential of the cross flow fan 7 can be sufficiently fulfilled. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an air conditioner including a cross flow fan and a stabilizer.

  Conventionally, this type of air conditioner has a shape in which a stabilizer extends in the direction of rotation of the cross flow fan and receives a circulation flow (circulation vortex) created by the cross flow fan in a flow path formed by the stabilizer and the rear guider. It has become. And the shape from the tongue part of this stabilizer to the front-end | tip is a smooth curve or a straight line.

FIG. 6 is an enlarged view of a main part of a conventional air conditioner described in Patent Document 1. As shown in FIG. 6, it is composed of a stabilizer 6, a cross flow fan 7, a rear guider 8, and a heat exchanger 9, and as shown in FIG. The shape is a smooth curve or straight line.
JP-A-10-160185

  However, in the conventional configuration, the stabilizer promotes the formation of a circulating vortex and works to catch it, but the vortex does not work any further, and the potential of the cross flow fan is sufficiently increased. Not pulled out.

  In order to solve the above-described conventional problems, an air conditioner of the present invention is an indoor unit of an air conditioner including a cross flow fan, a stabilizer, a rear guider, and a heat exchanger in a main body. The shape of the air passage from the tongue to the tip is not a smooth curve or straight line as in the prior art, but a recess is made on the stabilizer from the tongue to the tip.

  The air conditioner of the present invention is not smoothly connected from the tongue portion to the tip of the stabilizer, but has a shape with a recess, so that the circulating vortex formed by the cross flow fan is directed to the stabilizer side. Since the actual flow path excluding the circulation vortex portion is widened from the flow path surrounded by the stabilizer and the rear guider, the air blowing performance is improved.

  1st invention is providing the recessed part in the position facing the crossflow fan of a stabilizer. Generally, when a fluid passes over a recess, the static pressure is reduced at that location. As shown in FIG. 2, as a result of the fluid passing through the concave portion at a flow velocity v, a force F that lifts the concave portion of the fluid acts, and at the same time, F ′ due to the reaction force is generated. Using this characteristic, by creating such a recess at a position facing the cross flow fan of the stabilizer, it is possible to attract the circulating vortex inside the air conditioner formed by the cross flow fan to the stabilizer side. Become. As a result, a large actual flow path inside the air conditioner can be secured, leading to an increase in the air volume.

The second invention is that, in the first invention, the concave portion has a shape penetrating both left and right end portions. By adopting such a shape, since it can be considered in a two-dimensional drawing, the process from drawing creation to molding becomes easy.

  The third invention is that, in particular, in the first or second invention, the width (b) of the bottom is made equal or smaller than the width (a) of the inlet (circulation vortex forming surface) of the recess. By adopting such a shape, it becomes easy to pull out the mold at the time of forming the stabilizer.

  In the fourth aspect of the invention, in particular, in the first to third aspects of the invention, the depth (c) of the concave portion is equal to or larger than the width (a) of the circulating vortex forming surface. By adopting such a shape, it is difficult for the fluid passing over the concave portion to enter the concave portion, so that the effect when the present stabilizer is used is enhanced.

  According to a fifth aspect of the invention, in particular, in the first to fourth aspects of the invention, the boundary surface between the recess and the stabilizer is formed in a substantially R shape. As shown in FIG. 4, by making the end facing the opening of the recess into a substantially R shape, air turbulence is less likely to occur at that location, so that stable circulation vortices can be formed.

  The sixth invention is the one in which the plurality of recesses are provided in the longitudinal direction of the stabilizer, particularly in the first and third to fifth inventions. The circulation vortex formed by the crossflow fan is not uniform in any part in the left-right direction, and varies greatly depending on the presence of side walls or the degree of draft resistance on the upstream / downstream side of the crossflow fan. There is also a part. For this reason, by providing a plurality of recesses instead of a single one in this way, it is possible to create recesses only in necessary parts without providing recesses in the part where the formation state of the circulating vortex is extremely bad. It is possible to lead to a decrease.

  In the seventh invention, in particular, in the first to sixth inventions, the shape of the concave portion is changed for each of them. As described above, uniform circulation vortices are not always formed in the left-right direction in an air conditioner. Therefore, it is necessary to make the shape of a recessed part suitable for each circulation vortex. As in the present invention, by changing the shape of each recess, it is possible to create a recess that takes into account the circulation vortex formation for each location.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited by this embodiment.

(Embodiment 1)
FIG. 1 shows an indoor unit for an air conditioner according to a first embodiment of the present invention. In FIG. 1, a main body 1 includes a frame 2 and a front cover 3 attached to the front of the frame 2, and a suction grill 4 is provided on the frame 2 and the front cover 3.

FIG. 2 shows how the force is applied when the fluid passes through the recess. In FIG. 2, when a fluid having a density ρ generally passes at a height z, a pressure P, and a flow velocity v (g: gravitational acceleration),
Bernoulli's theorem:

As a result, the static pressure P decreases at that point. On the other hand, since v = 0 inside the recess, the static pressure does not decrease. As a result, a force F directed outward from the recess as shown in FIG. 2 is generated due to the pressure difference inside and outside the recess. At the same time, due to the law of action / reaction, a force F ′ having the same magnitude as F but opposite in direction is also generated.

  3 and 4 are detailed views of the present invention. In the figure, the air conditioner 1 is configured such that the wind that has passed through the heat exchanger 9 by the cross flow fan 7 passes through the flow path formed by the stabilizer 6 and the rear guider 8. Further, the up-and-down air direction changing blade, the left-right direction air-direction changing blade, the heat exchange temperature detector, the microcomputer, and the like are also constituent elements of the air conditioner 1.

  In the present embodiment, as shown in FIG. 3, a recess is provided in the circulating vortex forming portion of the stabilizer 6. By adopting such a stabilizer shape, the circulating vortex inside the air conditioner formed by the cross flow fan is attracted to the stabilizer side, and as a result, the blowing performance is improved. Furthermore, by making the shape as shown in FIG. 4, that is, the concave shape is the largest on the surface where the circulation vortex is formed (a), the width becomes smaller (b) when it is away from the surface, and By setting the depth (c) to be smaller than the width (a) on the circulating vortex forming surface, it is possible to more significantly reduce the static pressure in the recess. In addition, since the downstream ends facing the opening of the recess are rounded, it is possible to prevent air turbulence at these ends. The present invention is characterized in that the shape of the air passage from the tongue portion of the stabilizer to the tip is not a smooth curve or straight line as in the prior art. The shape is not limited to that shown in FIG. That is, it goes without saying that the concave portion may be formed by a curve such as a semicircle. In addition, the concave portion may be provided anywhere on the circulating vortex forming portion of the stabilizer, and the upstream end facing the opening of the concave portion may be rounded.

(Embodiment 2)
FIG. 5 is an example of a circulating vortex forming surface of the stabilizer in the second embodiment of the present invention. As shown in FIG. 5, in the present invention, the shape of the concave portion provided on the stabilizer circulation vortex forming surface varies depending on the location. That is, in FIG. 5, the concave portion is not provided in the vicinity of the central portion in the longitudinal direction and both side walls, and the width and depth of the concave portion are large in the central portion, and conversely, the end portion is smaller. . In the air conditioner, the circulation vortex is weak and easy to be unstable because the flow velocity is small at the cross section where the side wall and functional parts are mounted in general. On the other hand, in other areas Since the flow velocity is large, the circulating vortex is strong and stable. For this reason, in the present embodiment, the formation of the circulating vortex is not prevented by not creating the concave portion in the vicinity of the wall surface and the functional component mounting location, and conversely, the larger concave portion is created as the distance from them is increased, and the vortex is stabilized. The effect of attracting to the side is increased. In this way, by changing the shape of the concave portion of the circulating vortex forming surface in the longitudinal direction, it is possible to obtain an optimal concave shape that takes into account the formation of the circulating vortex at each position, so that a higher effect can be obtained. .

  Depending on the status of the functional components mounted upstream and downstream of the crossflow fan, the stability of the circulating vortex may not be as described above, and the recess shape may not be as shown in FIG. Needless to say.

  As described above, the air conditioner according to the present invention can contribute to the improvement of the air blowing performance because the actual flow path excluding the circulation vortex portion is widened. It can also be applied to.

The perspective view of the indoor unit of the air conditioner in Embodiment 1 of this invention Schematic of how the force works when fluid passes over the recess The principal part enlarged view of the air conditioner in Embodiment 1 of this invention Detailed view of recess shape in embodiment 1 of the present invention The principal part enlarged view of the air conditioner in Embodiment 2 of this invention. Enlarged view of the main parts of a conventional air conditioner

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body 2 Underframe 3 Front cover 4 Suction grill 5 Recessed part 6 Stabilizer 7 Cross flow fan 8 Rear guider 9 Heat exchanger

Claims (7)

An air conditioner comprising at least a cross flow fan and a stabilizer, wherein a recess is provided at a position of the stabilizer facing the cross flow fan. The air conditioner according to claim 1, wherein a concave portion is provided so as to penetrate both left and right end portions of the stabilizer. The air conditioner according to claim 1 or 2, wherein a cross-sectional shape of the concave portion is a substantially trapezoidal shape such that a surface side facing the cross flow fan opens. The air conditioner according to any one of claims 1 to 3, wherein a depth of the recess is equal to or greater than a width on a surface side of the recess. The air conditioner according to any one of claims 1 to 4, wherein a boundary surface between the concave portion and the stabilizer has a substantially R shape. The air conditioner according to claim 1, wherein a plurality of the concave portions are provided in a longitudinal direction. The air conditioner according to claim 1, wherein the concave shape is changed for each concave portion.

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