JP2013096689A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner capable of suppressing increase of collision loss and flow loss by a vertical wind direction changing blade even when the vertical wind direction changing blade is disposed in a ventilation flue in which a main flow between a stabilizer and a rear guider flows, and improving air distribution performance by diffuser effect by disposing the vertical wind direction changing blade on a proper position.SOLUTION: As the airflow of a high flow rate blown off from an once-through fan through the ventilation flue, partially passes in a longitudinal groove 17, when the airflow passes near a tip section 16 of the vertical wind direction changing blade of no small thickness at a rear guider 5 side, shearing force of the flow generates between the longitudinal groove and a part free from the longitudinal groove 17, and fine disturbance generates, so that a turbulent flow boundary layer is formed as a boundary layer near a surface of the tip section 16 of the vertical wind changing blade, thus a width of speed velocity gradient to the main flow is reduced, and the resistance due to collision of airflow near the tip section 16 of the vertical wind direction changing blade can be reduced.

Description

  The present invention relates to an air conditioner that is provided with air direction change blades that change the direction of air blown out from an air outlet in an air conditioner indoor unit, and that performs air conditioning operation by controlling the air direction change blades. The present invention relates to a structure of an up / down air direction changing blade that changes the direction of air blown out from an outlet up and down.

  A conventional air conditioner is provided with wind direction changing blades that change the direction of air blown from the air outlet of the indoor unit. The wind direction changing blade is composed of an up / down air direction changing blade that changes the direction of the air blown from the air outlet up and down and a left / right wind direction changing blade that changes the direction of the air blown out from the air outlet to the left and right.

  Therefore, as a conventional technique for improving the air blowing performance of the indoor unit by the configuration of the air outlet of the indoor unit having the up-and-down air direction changing blades, the blowing height is 5% or more and 30% or less of the blowing height from the front end of the rear guider side of the blowing unit. It is arranged so that the front edge vicinity of the vertical wind direction change blade is located at the position, provided with a step that suddenly expands in the blowing direction on the stabilizer side of the ventilation path, and in the downstream area, it is in the state before the expansion rate is suddenly expanded The thing of the structure which provides the level | step difference to return is disclosed. (For example, refer to Patent Document 1).

  11 and 12 relate to an indoor unit of an air conditioner described in Patent Document 1. FIG.

  FIG. 11 is a perspective view of the indoor unit of the air conditioner of the present invention, and FIG. 12 is a cross-sectional view of the indoor unit. 11 and 12, the main body 1 of the indoor unit of the air conditioner includes a suction port 10, a heat exchanger 2, a blower outlet 11, and a once-through fan 3, and operates the once-through fan 3 to suck the suction port 10. More indoor air is taken in, and the air heat-exchanged by the heat exchanger 2 is blown out from the outlet 11. In the ventilation path 13 from the cross-flow fan 3 to the blower outlet 11, a stabilizer 4 extending in the direction of the rotation axis at a portion near the front side of the cross-flow fan 3, and an upper surface wall 8 formed in the blowing direction from the stabilizer 4 The rear guider 5 that forms the bottom wall from the rear side of the cross-flow fan 3 to the blower outlet 11, the left and right side walls 12, and the vertical airflow direction changing blade 6 that has a substantially arc-shaped cross section and controls the vertical direction of the blown air. It has.

  The upper surface wall 8 of the ventilation path 13 continuing from the stabilizer 4 is configured to rapidly expand at the expansion point 8a in the middle of the blowing direction and to return to the expansion rate before the rapid expansion at the change point 8b in the downstream region. This is because the resistance of the up-and-down wind direction changing blade 6 is reduced by rapid expansion, and the reason why the expansion rate before the rapid expansion is restored is to prevent the blown airflow from being stalled by the rapid expansion. As a result, loss due to sudden expansion can be reduced. Furthermore, a predetermined stable blowing direction can be ensured.

The blowout height H is a distance from the rear guider tip 5a where the substantially straight line ends at the blowout tip of the rear guider 5 until a straight line extending in a substantially vertical direction hits the upper surface wall 8. When the up / down wind direction changing blade 6 is set to a position where the air volume is maximized, the main body side front edge 6a of the up / down air direction changing blade 6 is arranged at a position of 5% to 30% from the rear guider tip 5a side of the blowing height H. ing. As a result, the airflow blown out along the rear guider 5 directly follows the up / down air direction changing blade 6 so that the up / down air direction changing blade 6 serves as the rear guider 5 and leads to improvement of the blowing performance by the diffuser effect. The diffuser effect means that the wind speed changes gradually and smoothly from a state where the wind speed immediately after being blown out from the fan (high dynamic pressure state) to a state where the wind speed of the blowing part is low (state where dynamic pressure is low). This means that the dynamic pressure is recovered. Thereby, the ventilation performance of the indoor unit can be improved.

  Further, the mainstream wind also flows on the back surface of the up / down wind direction changing blade 6, that is, the lower side surface 6c, and the performance can be improved by promoting the same effect.

JP 2011-64399 A

  However, in the conventional configuration described in Patent Document 1 above, since the vertical airflow direction changing blade is disposed in the ventilation path through which the main flow between the stabilizer and the rear guider flows, the vertical airflow direction changing blade is at least thick, or at least When two or more are arranged, an increase in flow resistance due to a collision loss at the leading edge of the up / down air direction changing blade, a frictional resistance of the up / down air direction changing blade itself, and a separation vortex from the surface of the up / down air direction changing blade cannot be avoided.

  Therefore, even if the diffuser effect is exerted on the up / down airflow direction changing blade, there is a problem that the improvement of the blowing performance of the indoor unit cannot be sufficiently exhibited.

  The present invention solves the above-described conventional problem, and even if the vertical airflow direction change blade is arranged in the ventilation path through which the main flow between the stabilizer and the rear guider flows, the collision loss and flow loss of the vertical airflow direction change blade itself are reduced. The present invention provides an air conditioner that suppresses the increase and exhibits improved air blowing performance by the diffuser effect by installing the blades in the proper arrangement of the up / down air direction changing blades.

  In order to solve the above-described conventional problems, the air conditioner of the present invention is provided with an up-and-down air direction change blade that changes the direction of the air blown out from the air outlet in the indoor unit, and controls the up-and-down air direction change blade. An air conditioner that performs air-conditioning operation, and the ventilation path located upstream of the outlet is a rear guider located downstream of the cross-flow fan, and a stabilizer that is located downstream of the cross-flow fan and faces the rear guider And the upper and lower airflow direction changing blades are rotatably provided in the vicinity of the air outlet, and a ventilation path is provided from the cross-flow fan to the tip of the upwind side of the upper and lower airflow direction changing blades. And a plurality of longitudinal grooves in a direction substantially parallel to the main stream of the airflow blown out from the blowout port.

  By adopting such a configuration, a part of the upper and lower airflow direction change blades that have a large thickness when the airflow with a high flow velocity blown out from the once-through fan passes through the ventilation path passes vertically. By passing through the longitudinal groove at the tip of the wind direction changing blade, a flow shear force is generated between it and the part without the longitudinal groove, causing a fine turbulence. By making the boundary layer near the surface of the head part a turbulent boundary layer, the width of the velocity gradient with the main stream is reduced, and the resistance caused by the collision of the air current near the tip (front edge) part of the vertical wind direction change blade is reduced. To do.

  Moreover, the separation layer of the airflow in the vicinity of the surface can be moved downstream by making the boundary layer in the vicinity of the surface after the tip (front edge) portion of the up / down airflow direction changing blade also a turbulent boundary layer.

  As a result, the indoor unit of an air conditioner suppresses the increase in collision loss and flow loss in the vertical wind direction change blade itself even if the vertical wind direction change blade is placed in the ventilation path through which the main flow between the stabilizer and the rear guider flows. can do.

  The air conditioner of the present invention suppresses an increase in collision loss and flow loss in the vertical wind direction change blade itself even if the vertical wind direction change blade is arranged in the ventilation path through which the main flow between the stabilizer and the rear guider flows. The improvement of the air blowing performance can be exhibited by the diffuser effect by installing the wind direction changing blades in an appropriate arrangement.

The perspective view of the indoor unit of the air conditioner in Embodiment 1 of this invention Sectional drawing of the indoor unit in the embodiment The perspective view which looked at the up-and-down wind direction change blade alone in the embodiment from the windward The principal part enlarged view of FIG. 3 which shows the vertical groove of the front-end | tip part of an up-and-down wind direction change blade | wing Cross-sectional view of an up-and-down wind direction changing blade alone in the same embodiment Cross-sectional enlarged view of the main part of the tip of the up / down airflow direction changing blade in the same embodiment Sectional drawing of the other up-and-down wind direction change blade | wing alone in Embodiment 1 of this invention The principal part expanded cross-sectional view of the front-end | tip part of the other up-and-down wind direction change blade | wing in Embodiment 1 of this invention. Sectional drawing of the other up-and-down wind direction change blade | wing alone in Embodiment 1 of this invention The principal part expanded cross-sectional view of the front-end | tip part of the other up-and-down wind direction change blade | wing in Embodiment 1 of this invention. Perspective view of a conventional air conditioner indoor unit Cross section of conventional indoor unit

  According to the first aspect of the present invention, the indoor unit is provided with an up-and-down air direction changing blade that changes the direction of the air blown out from the air outlet up and down, and the air-conditioning operation is performed by controlling the up-and-down air direction changing blade. The ventilation path located on the upstream side of the air outlet includes a rear guider located on the downstream side of the cross-flow fan, a stabilizer located on the downstream side of the cross-flow fan and facing the rear guider, and both side walls of the indoor unit main body. The upper and lower wing direction vanes are air conditioners that are rotatably provided in the vicinity of the air outlet and have a plurality of vertical grooves in a direction substantially parallel to the tip of the windward side of the upper and lower air direction changing blades. .

  By adopting such a configuration, a part of the upper and lower airflow direction change blades that have a large thickness when the airflow with a high flow velocity blown out from the once-through fan passes through the ventilation path passes vertically. By passing through the longitudinal groove at the tip of the wind direction changing blade, a flow shear force is generated between it and the part without the longitudinal groove, causing a fine turbulence. By making the boundary layer near the surface of the head part a turbulent boundary layer, the width of the velocity gradient with the main stream is reduced, and the resistance caused by the collision of the air current near the tip (front edge) part of the vertical wind direction change blade is reduced. To do.

  Moreover, the separation layer of the airflow in the vicinity of the surface can be moved downstream by making the boundary layer in the vicinity of the surface after the tip (front edge) portion of the up / down airflow direction changing blade also a turbulent boundary layer.

  In a second aspect of the present invention, the cross section of the vertical groove of the up / down airflow direction changing blade is substantially V-shaped.

  By adopting such a configuration, the width of the bottom of the vertical groove becomes smaller, it does not flow to the vicinity of the bottom of the vertical groove, the speed reduction in the vertical groove at the tip of the vertical wind direction changing blade does not increase, and the vertical groove By suppressing the shear force of the flow between the part where there is no flow and generating a finer shear force, the boundary layer near the surface of the tip (front edge) part of the vertical wind direction change blade is kept small, The influence on the mainstream other than the vicinity can be kept small.

As a result, it is possible to reduce only the resistance of the airflow in the vicinity of the tip (front edge) portion of the up / down airflow direction changing blade, and to suppress the increase of the flow resistance due to the disturbance of the main flow as much as possible.

  According to the third aspect of the present invention, the maximum opening width L of the vertical groove of the vertical airflow direction changing blade is set such that L ≧ S with respect to the interval S between adjacent vertical grooves.

  By adopting such a configuration, it is possible to increase the flow path cross-sectional area near the surface of the tip of the up / down air direction changing blade by the amount in the vertical groove, and to reduce the main flow velocity in the vicinity of the top of the up / down air direction changing blade. It is possible to reduce the resistance caused by the collision of the airflow.

  The invention according to claim 4 is characterized in that the vertical grooves of the up-and-down wind direction changing blades are provided only on the surface side of the up-and-down air direction blades facing the stabilizer.

  By adopting such a configuration, when the up / down wind direction changing blade blows out the airflow from the outlet toward the lower side of the indoor unit, when the leeward side of the up / down air direction changing blade is directed downward from the upwind side, the stabilizer and The separation of a large air flow in the vicinity of the surface that occurs on the opposing surface side can be moved downstream, and a reduction in air volume can be suppressed.

  According to a fifth aspect of the present invention, the length of the vertical groove at the tip of the up / down airflow direction changing blade is longer than the surface side facing the stabilizer of the up / down airflow direction vane than the surface side facing the rear guider. It is a thing.

  With this configuration, when the up / down wind direction changing blade is rotated at the air outlet and the air flow is blown out from the indoor unit, the up / down air direction changing blade is changed from the angle at which the up / down air direction changing blade is substantially parallel to the inclination near the air outlet of the rear guider. In the angle range where the leeward side is directed downward from the leeward side, the resistance near the tip is reduced on the rear guider side, and the resistance near the tip is reduced on the stabilizer side, and the surface after the tip (front edge) part It is possible to optimize both the reduction of flow loss by moving the air flow separation position in the vicinity to the downstream.

  According to a sixth aspect of the present invention, at least two upper and lower airflow direction changing blades are provided in the vicinity of the air outlet, and among them, at least one of the upper and lower airflow direction changing blades close to the rear guider is provided with the vertical groove. It is a thing.

  With such a configuration, the resistance due to the collision of the airflow in the vicinity of the tip (front edge) portion of the vertical airflow direction changing blade is reduced on the rear guider side where the flow velocity of the airflow is relatively fast at the air outlet. Moreover, the separation layer of the airflow in the vicinity of the surface can be moved downstream by making the boundary layer in the vicinity of the surface after the tip (front edge) portion of the up / down airflow direction changing blade also a turbulent boundary layer.

  Therefore, since it is possible to suppress the deterioration of the air blowing performance with the upper and lower airflow direction changing blades with the higher wind speed at the air outlet, while controlling the airflow in the up and down direction of the air outlet of the indoor unit using a plurality of airflow changing blades. The air blowing performance can be kept optimal.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a perspective view of an indoor unit of an air conditioner according to Embodiment 1 of the present invention, and FIG. 2 is a cross-sectional view of the indoor unit according to the same embodiment.

  FIG. 3 is a perspective view of the up / down wind direction changing blade alone as viewed from the windward side in the same embodiment. FIG. 4 is an enlarged view of the main part of FIG. 3 showing the vertical groove at the tip of the up / down airflow direction changing blade.

  FIG. 5 is a cross-sectional view of the up-and-down wind direction changing blade alone in the same embodiment. FIG. 6 is an enlarged cross-sectional view of the main part of the tip of the up / down airflow direction changing blade.

  In addition, the same code | symbol is attached | subjected about the same component as a prior art document, and description is abbreviate | omitted.

  As shown in FIGS. 1 to 6, the main body 1 of the indoor unit of the air conditioner is provided with up and down air direction changing blades 14 and 15 that change the direction of the air blown out from the air outlet 11 up and down, and the up and down air direction changing blades 14 and 15 is an air conditioner that performs air-conditioning operation, and the ventilation path 13 that is located upstream of the outlet 11 includes a rear guider 5 that is located downstream of the cross-flow fan 3 and a downstream of the cross-flow fan 3. The stabilizer 4 located on the side and facing the rear guider 5 and both side walls 12 of the indoor unit body 1 are arranged, the up / down air direction changing blades 14 are arranged on the rear guider 5 side, and the up / down air direction changing blades 15 are arranged on the stabilizer 4 side, Airflow blown out from the blowout port 11 from the cross-flow fan 3 through the ventilation passage 13 to the tip 16 on the windward side of the up-and-down wind direction changing blade 14 so as to be rotatable around the rotation shafts 14z and 15z in the vicinity of the blowout port 11, respectively. It is provided with a plurality of longitudinal grooves 17 in a direction substantially parallel to the main flow.

  Further, as shown in FIG. 4, the longitudinal groove 17 has a substantially V-shaped cross section in a direction substantially perpendicular to the airflow blown from the air outlet 11.

  About the indoor unit of the air conditioner comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, when a fast air flow blown out from the cross-flow fan 3 through the ventilation path 13 passes through the vicinity of the tip 16 of the vertical airflow direction change blade 14 having a large thickness on the rear guider 5 side, a part of the airflow passes. A boundary layer in the vicinity of the surface of the tip 16 of the up-and-down wind direction changing blade 14 is generated by passing through the vertical groove 17 to generate a flow turbulence between the vertical groove 17 and a portion without the vertical groove 17. By using as a turbulent boundary layer, the width of the velocity gradient between the main flow and the mainstream is reduced, and the resistance due to the collision of the airflow in the vicinity of the tip 16 of the up-and-down airflow direction changing blade 14 is reduced.

  Moreover, the separation layer of the airflow in the vicinity of the surface can be moved downstream by making the boundary layer in the vicinity of the surface after the tip portion 16 of the up-and-down air direction changing blade 14 a turbulent boundary layer.

  Furthermore, by making the cross section of the vertical groove 17 of the vertical airflow direction change blade 14 in a direction substantially perpendicular to the airflow blown from the air outlet 11, the width becomes smaller toward the bottom of the vertical groove 17, The airflow does not flow into the vicinity of the bottom of the groove 17, the flow velocity in the vertical groove 17 at the tip 16 of the vertical airflow direction changing blade 14 does not increase greatly, and the shearing force of the flow between the portion without the vertical groove 17 By suppressing the boundary layer in the vicinity of the surface of the tip portion 16 of the up-and-down air direction changing blade 14 to a small size by reducing the pressure and generating a finer shear force, the influence on the mainstream other than the vicinity of the surface can be suppressed to a small level. . As a result, it is possible to reduce only the resistance of the airflow in the vicinity of the tip portion 16 of the up / down airflow direction changing blade 14 and to suppress the increase in flow resistance due to the disturbance of the main flow as much as possible.

Further, the vertical airflow direction changing blades 14 and 15 are provided in the vicinity of the air outlet 11, and among them, the vertical airflow 17 is provided in the vertical airflow direction changing blade 14 close to the rear guider 5. On the rear guider 5 side where the flow velocity is relatively fast, the resistance due to the collision of the airflow in the vicinity of the tip 16 of the up / down air direction changing blade 14 is reduced. Further, the boundary layer in the vicinity of the surface after the tip portion 16 of the up-and-down wind direction changing blade 14 is also a turbulent boundary layer, so that the separation position of the airflow in the vicinity of the surface can be moved downstream. Since the lowering of the air blowing performance by the upper and lower wind direction changing blades 14 having the higher wind speed can be suppressed as much as possible, the vertical wind direction of the air outlet 11 of the main body 1 of the indoor unit 1 is controlled using the upper and lower air direction changing blades 14 and 15. The air blowing performance of the main body 1 of the indoor unit can be kept optimal.

  In addition, as shown in FIGS. 7 and 8, the vertical groove 17 of the vertical wind direction changing blade 14 is provided only on the side of the surface 14b facing the stabilizer 4 of the vertical wind direction blade 14 so that the vertical wind direction changing blade 14 is provided. When the air flow from the air outlet 11 is blown out downward of the main body 1 of the indoor unit, the surface 14b facing the stabilizer 4 when the leeward side 14d of the up / down airflow direction changing blade 14 is directed downward from the windward side 14a. Separation of a large air flow near the surface that occurs on the side can be moved downstream, and a reduction in air volume can be suppressed.

  Further, as shown in FIGS. 9 and 10, the length of the vertical groove 18 of the tip 16 of the up / down air direction changing blade 14 is set so that the surface 14 b side facing the stabilizer 4 of the up / down air direction changing blade 14 is the rear guider. 5 is made longer on the leeward side than the surface 14c side that faces 5.

  As a result, when the up / down air direction changing blade 14 is rotated about the rotation shaft 14z at the air outlet 11 and the airflow is blown out from the indoor unit body 1, the up / down air direction changing blade 14 is substantially the same as the inclination of the rear guider 5 near the air outlet 11. The resistance in the vicinity of the tip 16 is reduced on the rear guider 5 side in the range of the angle where the leeward 14d side of the up / down wind direction changing blade 14 is directed downward from the upwind 14a side from the parallel angle. The groove 18 makes it possible to optimize both the reduction of the resistance in the vicinity of the tip 16 and the reduction of the flow loss by moving the air flow separation position in the vicinity of the surface after the tip 16 downstream.

  The maximum opening width L of the vertical grooves 17 and 18 of the vertical airflow direction changing blade 14 is set to L ≧ S (not shown) with respect to the interval S between adjacent vertical grooves, so that the vertical grooves 17 and 18 Therefore, the cross-sectional area of the flow path near the surface of the tip portion 16 of the up-and-down air direction changing blade 14 can be increased, and the flow velocity of the mainstream in the vicinity of the tip portion 16 of the up-and-down air direction changing blade 14 can be reduced. Resistance due to collision can be reduced.

  As described above, the upper and lower airflow direction changing blades of the air outlet of the air conditioner according to the present invention can control the airflow by suppressing the flow loss such as collision loss and separation of the airflow from the air outlet as much as possible.

  Therefore, it can be applied not only to a separate indoor unit of a domestic air conditioner and an indoor unit of a commercial air conditioner, but also to commercial refrigeration equipment, commercial and industrial air curtain equipment.

DESCRIPTION OF SYMBOLS 1 Main body of indoor unit 3 Cross-flow fan 4 Stabilizer 5 Rear guider 11 Outlet 12 Side wall 13 Ventilation path 14, 15 Vertical wind direction change blade 16 Tip part 17, 18 Vertical groove

Claims (6)

An indoor unit is provided with an up-and-down air direction change blade that changes the direction of air blown from the air outlet up and down, and controls the up-and-down air direction change blade to perform an air-conditioning operation, the air conditioner upstream of the air outlet The ventilation passage located on the side is formed by a rear guider located on the downstream side of the cross-flow fan, a stabilizer located on the downstream side of the cross-flow fan and facing the rear guider, and both side walls of the indoor unit main body, Is an air conditioner that is provided in the vicinity of the outlet and is rotatable, and has a plurality of vertical grooves in a direction substantially parallel to the tip of the windward side of the up-and-down wind direction changing blade. The air conditioner according to claim 1, wherein a cross section of a vertical groove of the up-and-down air direction changing blade is substantially V-shaped. 3. The air conditioner according to claim 1, wherein a maximum opening width L of the vertical groove of the vertical wind direction changing blade is set to L ≧ S with respect to an interval S between adjacent vertical grooves. The air conditioner according to any one of claims 1 to 3, wherein a vertical groove of the up-and-down air direction changing blade is provided only on a surface side of the up-and-down air direction blade facing the stabilizer. The length of the vertical groove at the tip of the up-and-down wind direction changing blade is such that the surface side facing the stabilizer of the up-and-down wind direction blade is longer on the lee side than the surface side facing the rear guider. 4. The air conditioner according to any one of 3. The at least two or more up-and-down wind direction change blades are provided in the vicinity of the air outlet, and the vertical groove is provided in at least one or more of the up-and-down air direction change blades close to the rear guider. To 5. The air conditioner according to any one of 5.