JP6427031B2 - Air conditioner - Google Patents

Description

  The present invention relates to an air conditioner, and more particularly to an air conditioner having a cooling operation function.

  For example, as an example of an air conditioner, a ceiling-embedded air conditioner (hereinafter referred to as an air conditioner) sucks indoor air into an air conditioning unit main body embedded in a ceiling, and heat exchangers of the sucked indoor air The heat exchange is carried out, and the heat-exchanged air (air-conditioned air) is blown out from the outlet to the room to air-condition the room (cooling, heating and dehumidification, etc.). The air outlet has a wind direction plate called a louver or a vane, and the wind direction plate controls the direction of the blown air of the conditioned air.

  By the way, when the cooling operation is performed, the refrigerant flowing in the heat exchanger evaporates, thereby depriving the heat around the heat exchanger, and the indoor air sent from the blower fan is cooled by the heat exchanger. Cold air is sent indoors.

  Then, when the high temperature / humid air comes into contact with the wind direction plate cooled by the cooled air, the occurrence of dew condensation around the outlet is often experienced. And when the dew condensation grows and falls as dew condensation water, the user may feel uncomfortable. For this reason, it is necessary to consider a structure that does not cause condensation at the air outlet of the air conditioner.

  As a method of suppressing the occurrence of condensation on the wind direction plate cooled by the cooled air, for example, the following configuration is proposed in Japanese Patent Application Laid-Open No. 2012-97958 (Patent Document 1). That is, a hole is provided in the jump platform and the jump platform between the heat exchanger and the air outlet to suppress condensation. This jumping platform has the effect of directing the flow of cooled air toward the design surface side of the wind direction plate (the surface that can be seen when the ceiling is viewed from below), preventing air condensation by flowing air to the design surface side. There is. Further, by providing a hole in the jump stand, the cooled air can be made to flow also on the side opposite to the design surface of the wind direction plate (a surface not visible when the ceiling is viewed from below). Due to the two effects, the cooled air flows on both the front and back sides of the wind direction plate, and the condensation of the wind direction plate can be prevented.

Unexamined-Japanese-Patent No. 2012-97958

  The air conditioner disclosed in Patent Document 1 is an effective method when the volume of the cooled air is sufficiently secured. However, compared to the vicinity of the center of the blowout generally, the longitudinal end side of the blowout tends to have a smaller air volume due to its structure. Since the air sent out from the blower fan becomes a swirling flow from the structure of the air conditioning unit, the volume of the blown air is not uniform when viewed at the opening in the longitudinal direction of the outlet, and the longitudinal end of the outlet is Air volume decreases.

  In particular, this tendency is remarkable when the air volume is small. For this reason, since the air layer of the cooled air is not easily formed, there is a high possibility that the high temperature / humid air comes into contact with the directly cooled wind direction plate to cause condensation. Since the axial part which pivotally supports a wind direction board is arrange | positioned at the longitudinal direction edge part of a blower outlet, an air layer is hard to be formed in this part, and possibility that much dew condensation arises will become high.

  Furthermore, in an air conditioner having a long longitudinal length of the air outlet, a wind direction plate is used that matches the length of the air outlet. In the case where the wind direction plate is long, in order to support the wind direction plate, a rotary shaft support is provided in the middle of the wind direction plate. Therefore, it is difficult to form an air layer in the same manner because air turbulence is large at this rotary shaft support portion, and high temperature / humid air at this portion directly contacts the rotary shaft portion cooled and dew condensation occurs. Increase the risk of

  An object of the present invention is to provide a novel air conditioner in which condensation does not easily occur on the shaft portion of the wind direction plate at the longitudinal direction end of the outlet or the rotary shaft support portion provided in the middle of the wind direction plate.

  The feature of the present invention is that the wall surface portion of the longitudinal side end of the outlet forms a projecting portion which produces the Coanda effect on the upper side of the shaft of the wind direction plate, or the wind direction plate at the wall surface of the outlet in the longitudinal direction The projection forming the Coanda effect is formed on the upper side of the rotary shaft support provided in the middle of the above.

  According to the present invention, a large number of cooled air can be supplied to the shaft portion of the wind direction plate at the longitudinal direction end of the outlet or the rotary shaft supporting portion provided in the middle of the wind direction plate Therefore, direct contact between high temperature and high humidity air is suppressed, and the risk of dew condensation can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS It is the perspective view which looked at the ceiling-embedded air conditioner to which this invention is applied from the downward direction. It is side surface sectional drawing of the air conditioner shown in FIG. It is an expanded sectional view of the blower outlet of the air conditioner shown in FIG. It is an enlarged internal perspective view of the longitudinal direction end vicinity of the blower outlet which is 1st Embodiment of this invention. FIG. 5 is a perspective view of a projecting portion producing the Coanda effect shown in FIG. 4; It is an expansion internal perspective view of the longitudinal direction side edge part vicinity of the blower outlet which is 2nd Embodiment of this invention. FIG. 7 is a perspective view of a projecting portion producing the Coanda effect shown in FIG. 6; It is an expansion internal perspective view of longitudinal direction edge part vicinity of the blower outlet which is 3rd Embodiment of this invention. It is an expansion internal perspective view of the rotating shaft support part of the wind direction board which is 4th Embodiment of this invention. It is a front view which shows the structure of the blower outlet which is 5th Embodiment to which this invention is applied. It is a front view which shows the structure of the blower outlet different from 5th Embodiment.

  Embodiments of the present invention will be described in detail with reference to the drawings, but the present invention is not limited to the following embodiments, and various modifications and applications may be made within the technical concept of the present invention. It is included in the scope.

  Hereinafter, an embodiment of the present invention will be described, but before that, an overall configuration of an air conditioner to which the present invention is applied will be described based on FIG. 1 and FIG.

  In FIG. 1, reference numeral 1 denotes a unit main body which is an indoor unit of a ceiling-embedded air conditioner, and is embedded in the back of the indoor ceiling. A decorative panel 2 is detachably fixed to the unit body 1. A suction port 3 for sucking room air is formed at the center of the decorative panel 2. Moreover, the blower outlets 4 and 5 which blow out the air (air-conditioning air) air-conditioned by heat exchange symmetrically with the border of the suction inlet 3 of the makeup panel 2 are provided, respectively.

  And the wind direction boards 6 and 7 which make it possible to change the blowing direction of air are provided in each blower outlet 4 and 5, respectively. The wind direction plates 6, 7 are pivotally supported rotatably at the longitudinal end of the blowout port. The wind direction plates 6, 7 are disposed in the air blow direction, and are formed in a curved shape in cross section. The shape of the wind direction plate is curved toward the inside (upward in FIG. 2) of the unit main body 1, and the upper surfaces of the wind direction plates 6, 7 are anti-design surfaces, and the lower side is a design surface. As shown in FIG. 2, a heat insulating material 8 is provided to surround the wind direction plates 6, 7. The heat insulating material 8 is also formed in a curved shape in cross section to determine the blowing direction of air.

  Next, in FIG. 2, an air passage 9 communicating the suction port 3 and the blowout ports 4 and 5 is formed in the unit main body 1. A blower fan 10 (for example, a turbo fan) and a heat exchanger 11 are installed in the path of the air passage 9. The blower fan 10 is rotationally driven by the electric motor 12 and sucks in room air through the suction port 3, and the sucked air is sent out to the blow out ports 4, 5 through the heat exchanger 11.

  In the heat exchanger 11, the refrigerant flowing inside thereof forms a refrigeration cycle, operates as an evaporator at the time of cooling, and operates as a condenser at the time of heating, and exchanges heat with the sucked air to obtain warm air or cold air. To generate Further, the heat exchanger 11 is installed on the drain pan 13, and the drain pan 13 temporarily stores the condensed water dropped from the heat exchanger 11 and discharges it to the outside.

  Although FIG. 3 is an enlarged cross section of the air outlet 4 side of the air conditioner shown in FIG. 2, the other air outlet 5 side has the same configuration, so the air outlet 4 side will be described below. As shown in FIG. 3, the air passage 9 connected to the air outlet 4 is surrounded by the outer wall 14 of the unit body 1 and the side wall 15 of the drain pan 13, and an outlet side opening communicating with the air passage 9 and the air outlet 4 It has a part 16. The drain pan 13 is interposed between the unit body 1 and the decorative panel 2, and the outlet side opening 16 is configured to connect the air passage 9 and the air outlet 4.

  The blowout port 4 of the decorative panel 2 extends in the longitudinal direction along the suction port 3, and the wind direction plate 6 is rotatably disposed inside. The wind direction plate 6 is supported by a rotating shaft 17, and the wind direction plate 6 and the rotating shaft 17 are integrally formed of synthetic resin. The rotating shaft 17 is rotated by an electric motor (not shown) by an electric motor (not shown), whereby the wind direction plate 6 is rotated to an arbitrary position. The pivot shaft 17 is pivotally supported on the wall surface of the longitudinal direction end 18 of the blowout port 4, and the longitudinal direction end 18 is formed of a wall surface forming the suction port 4.

  The ceiling-embedded air conditioner having the above-described configuration is already well known, and thus further description will be omitted. As described above, generally, the longitudinal end 18 side of the blowout port 4 has a smaller air volume than near the center of the blowout port 4. For this reason, since the air layer of the cooled air is not easily formed, there is a high possibility that the high temperature / humid air comes into contact with the directly cooled wind direction plate 6 to cause dew condensation. Furthermore, since the pivot shaft 17 for pivotally supporting the wind direction plate 6 is disposed at the longitudinal end 18 of the blowout port 4, the air layer is difficult to be formed at this portion, and the possibility of much dew condensation increases.

  Therefore, in the present embodiment, a projecting portion that produces the Coanda effect is formed on the upper side of the pivot shaft 17 of the wind direction plate 6 on the wall surface portion of the longitudinal direction end 18 of the blowout port 4. Since a large amount of cooled air can be supplied to the pivot shaft 17 of the wind direction plate 6 pivotally supported at the longitudinal direction end 18 of the blowout port 4 by the projecting portion producing the Coanda effect, high temperature and high humidity It is possible to suppress direct contact of air and to reduce the possibility of condensation. Hereinafter, embodiments of the present invention will be described in detail.

  A first embodiment of the present invention will be described based on FIG. 4 and FIG. FIG. 4 is an enlarged view of the inside of the vicinity of the longitudinal side end 18 of the outlet 5. A pivot shaft 17 of the wind direction plate 6 is pivotally supported by the wall surface portion 18A of the longitudinal direction end portion 18 of the blowout port 5. Further, a projecting portion 20 which produces the Coanda effect is provided on the wall surface portion 18A of the upper longitudinal end portion 18 of the pivot shaft 17. In the present embodiment, the projecting portion 20 is integrally formed with the wall surface portion 18A of the longitudinal end portion 18 by a synthetic resin. That is, it is integrally formed with the passage of the blower outlet 5 made of a material such as a synthetic resin. However, it is also possible to separately form the projecting portion 20 and fix it to the wall surface portion 18A of the longitudinal end portion 18 with a bolt or an adhesive.

  As shown in FIGS. 4 and 5, the projecting portion 20 producing the Coanda effect protrudes in the direction away from the wall surface portion 18A of the longitudinal end 18 and is parallel to the wall surface portion 18A, and has a rectangular top surface portion 20A. An upper inclined surface 20B extending upward from the top surface 20A and connected to the wall surface 18A of the longitudinal end 18; and a wall surface 18A extending downward from the top surface 20A of the longitudinal end 18 And a lower slope 20C connected to the Therefore, the cross section of the projecting portion 20 seen in the direction of the air flow is a trapezoidal cross section with the wall surface portion 18A side as the bottom.

  Here, with the Coanda effect, roughly speaking, if there is a curved wall by the air flow, the air will flow along the curved surface of the wall even if the air flow direction and the wall direction are separated. Phenomenon. Therefore, as shown in FIGS. 4 and 5, the air flowing in the vicinity of the wall surface 18A of the longitudinal end 18 flows along the upper slope 20B by the Coanda effect as shown by the thick arrow A. Next, the air that has climbed up the upper slope 20B flows along the top 20A, and then flows along the lower slope 20C due to the Coanda effect.

  Therefore, air corresponding to the cross-sectional area of the upper slope 20B is guided to the top surface 20A side, and the induced air is guided along the lower slope 20C and flows into the vicinity of the pivot shaft 18. The flow of air using the Coanda effect is basically the same as in the other embodiments described below.

  As described above, since a large amount of cooled air can be supplied to the vicinity of the pivot shaft 17 of the wind direction plate 6 by the projecting portion 20 producing the Coanda effect, the air layer of the cooled air is easily formed, and the high temperature -Since the humid air is prevented from coming into direct contact with the cooled wind direction plate 6 and the pivot shaft 17, the possibility of dew condensation can be reduced.

  Further, by providing the top surface portion 20A parallel to the wall surface portion 18A of the longitudinal side end portion 18, the flow of the air which contacts and is deflected to the upper slope portion 20B flows along the plane of the top surface portion 20A by the Coanda effect. Therefore, the velocity distribution of air can be stabilized, which can contribute to the formation of an air layer.

  Here, although the upper side slope part 20B and the lower side slope part 20C are formed by the plane, it is also possible to form by the curved surface which expanded in the direction into which air flows. In addition, it is the same as that of the following other embodiment to form a slope part by a curved surface.

  Thus, a sufficient air layer is formed in the vicinity of the pivot shaft 17 of the wind direction plate 6 by securing a large amount of air flow around the pivot shaft 17 of the wind direction plate 6, so that high temperature / humid air is direct Since it is suppressed from contacting the wind direction plate 6 and the rotating shaft 17 which are cooled, it is possible to reduce the possibility of the occurrence of condensation. In addition, since the amount of air flowing toward the outside of the blowout port 4 is also increased, there is also an effect of preventing the intrusion of high temperature and high humidity air.

  Next, a second embodiment of the present invention will be described based on FIG. 6 and FIG. FIG. 6 is an enlarged view of the inside of the vicinity of the longitudinal side end 18 of the outlet 5. A pivot shaft 17 of the wind direction plate 6 is pivotally supported by the wall surface portion 18A of the longitudinal direction end portion 18 of the blowout port 5. A projecting portion 21 that produces the Coanda effect is provided on the wall surface 18A of the upper longitudinal end 18 of the pivot shaft 17. In the present embodiment, the projecting portion 21 is integrally formed with the wall surface portion 18A of the longitudinal end portion 18 by a synthetic resin. However, it is also possible to separately form the projecting portion 21 as in the first embodiment and to fix it to the wall surface portion 18A of the longitudinal end portion 18 with a bolt or an adhesive.

  As shown in FIGS. 6 and 7, the projecting portion 21 causing the Coanda effect protrudes in the direction away from the wall surface portion 18A of the longitudinal side end portion 18, and is parallel to the wall surface portion 18A. And an upper oblique direction inclined portion 21B extending obliquely upward from the top surface 21A and continuing to the wall surface 18A of the longitudinal end 18, and extending downward from the top surface 21A and extending longitudinally 18 And a lower slope portion 21C connected to the wall surface portion 18A.

  Therefore, the cross section of the projection 21 seen in the direction of the air flow is a trapezoidal cross section with the wall surface 18A side as the bottom side, and the shape of a triangular frustum pointed toward the center side of the outlet 5 It has become. The protrusion 21 of this triangular frustum also produces the Coanda effect, and air is induced along the shape of the triangular frustum. As shown in FIG. 6, the lower base of the triangular pyramid extends substantially horizontally as viewed from the air flow. Therefore, the upper oblique side is inclined downward toward the center of the blowout port 5.

  Thus, as shown in FIGS. 6 and 7, the air flowing in the vicinity of the wall surface portion 18A of the longitudinal end 18 flows along the upper oblique direction slope portion 21B by the Coanda effect as shown by the thick arrow A. . Next, the air that has climbed up the upper oblique direction slope portion 21B flows along the top surface portion 21A and further flows along the lower side slope portion 21C by the Coanda effect.

  Accordingly, air corresponding to the cross-sectional area of the upper oblique direction slope portion 21B is guided to the top surface portion 21A side, and the induced air flows into the vicinity of the pivot shaft 18 along the lower side slope portion 21C. As described above, since a large amount of cooled air can be supplied to the vicinity of the pivot shaft 17 of the wind direction plate 6 by the projecting portion 21 producing the Coanda effect, the air layer of the cooled air is easily formed, and high temperature -Since the humid air is prevented from coming into direct contact with the cooled wind direction plate 6 and the pivot shaft 17, the possibility of dew condensation can be reduced.

  Further, by providing the top surface portion 21A parallel to the wall surface portion 18A of the longitudinal side end portion 18, the flow of the air deflected in contact with the upper side oblique direction slope portion 21B follows the plane of the top surface portion 21A by the Coanda effect. Since it flows, the velocity distribution of air can be stabilized and it can contribute to formation of an air layer.

  Furthermore, since the upper slope of the triangular frustum forming the protrusion 21 is inclined toward the center of the blowout port 5, air can easily flow in the slope direction. Generally, air flows along the wind direction plate 6, so it tends not to flow to the outlet 5 side on the design surface side of the wind direction plate 6, but since the air is deflected by the slope of the triangular frustum, the wind direction plate It will also flow to the outlet 5 side on the design surface side of 6.

  The shape of the triangular frustum as the projecting portion 21 is arbitrary, and an appropriate shape may be set according to the shape of the blowout port 5, the shape of the wind direction plate 6, the shape of the rotation shaft 17, and the like.

  Thus, a sufficient air layer is formed in the vicinity of the pivot shaft 17 of the wind direction plate 6 by securing a large amount of air flow around the pivot shaft 17 of the wind direction plate 6, so that high temperature / humid air is direct Since it is suppressed from contacting the wind direction plate 6 and the rotating shaft 17 which are cooled, it is possible to reduce the possibility of the occurrence of condensation. In addition, since the amount of air flowing toward the outside of the blowout port 4 is also increased, there is also an effect of preventing the intrusion of high temperature and high humidity air.

  Next, a third embodiment of the present invention will be described based on FIG. FIG. 8 is an enlarged view of the inside of the vicinity of the longitudinal side end 18 of the blower outlet 4 rather than the blower outlet 5. A pivot shaft 17 of the wind direction plate 6 is pivotally supported by the wall surface portion 18A of the longitudinal direction side end portion 18 of the blowout port 4. Further, a projecting portion 22 which produces the Coanda effect is provided on the wall surface portion 18A of the upper longitudinal end portion 18 of the pivot shaft 17. In the present embodiment, the projecting portion 22 is also integrally formed of a synthetic resin with the wall surface portion 18A of the longitudinal end portion 18 as in the first embodiment and the second embodiment. Further, it is also possible to separately form the protruding portion 22 and fix it to the wall surface portion 18A of the longitudinal end portion 18 with a bolt or an adhesive.

  As shown in FIG. 8, the protrusion 22 which produces the Coanda effect protrudes from the wall surface 18A of the longitudinal end 18 in a direction away from the wall surface 18A and is parallel to the wall surface 18A. An upper oblique slope 22B extending obliquely from the top 22A to the upper side and connected to the wall 18A of the longitudinal end 18, and a wall of the longitudinal end 18 extending downward from the top 22A It is comprised from the lower side diagonal direction slope part 22C connected with the part 18A.

  Therefore, the cross section of the projecting portion 22 seen in the direction of the air flow is a trapezoidal cross section with the wall portion 18A side as the bottom side, and a triangular frustum pointed toward the diagonally lower side of the blowout opening 5 It has a shape. The protrusion 22 of this triangular frustum also produces the Coanda effect, and air is induced along the shape of the triangular frustum. A difference from FIG. 6 is that the lower base and the upper oblique side of the triangular pyramid, as viewed from the air flow, extend obliquely in the lower diagonal direction.

  Therefore, as shown in FIG. 8, the air flowing in the vicinity of the wall surface portion 18A of the longitudinal side end 18 flows along the upper oblique direction slope portion 22B by the Coanda effect as shown by the thick arrow A. Next, the air that has climbed up the upper diagonal direction slope portion 22B flows along the top surface portion 22A and further flows along the lower diagonal direction slope portion 22C by the Coanda effect.

  Thus, air corresponding to the cross-sectional area of the upper oblique direction slope 22B is guided to the top face 22A side, and the induced air flows into the vicinity of the pivot shaft 18 along the lower oblique direction slope 22C. become. As described above, since a large amount of cooled air can be supplied to the vicinity of the pivot shaft 17 of the wind direction plate 6 by the projecting portion 21 producing the Coanda effect, the air layer of the cooled air is easily formed, and high temperature -Since the humid air is prevented from coming into direct contact with the cooled wind direction plate 6 and the pivot shaft 17, the possibility of dew condensation can be reduced.

  Further, by providing the top surface 22A parallel to the wall surface 18A of the longitudinal side end 18, the flow of the air deflected in contact with the upper oblique direction slope 21B follows the plane of the top 22A by the Coanda effect. Since it flows, the velocity distribution of air can be stabilized and it can contribute to formation of an air layer.

  Furthermore, since the slope of the triangular frustum forming the projection 22 is inclined toward the center of the blowout port 4, air can easily flow in the slope direction. Generally, air flows along the wind direction plate 6, so it tends not to flow to the outlet 4 side on the design surface side of the wind direction plate 6, but since the air is deflected by the slope of the triangular frustum, the wind direction plate It will also flow to the outlet 4 side on the design surface side of 6.

  The shape of the triangular frustum that is the projecting portion 22 is arbitrary, and an appropriate shape may be set according to the shape of the air outlet 4, the shape of the wind direction plate 6, the shape of the pivot shaft 17 or the like.

  Finally, as can be seen from Example 1, Example 2 and Example 3, the shapes of the protrusions 20, 21 and 22 have an appropriate shape and an appropriate size according to the required air volume in the necessary places. Is selected and used.

Thus, a sufficient air layer is formed in the vicinity of the pivot shaft 17 of the wind direction plate 6 by securing a large amount of air flow around the pivot shaft 17 of the wind direction plate 6, so that high temperature / humid air is direct Since it is suppressed from contacting the wind direction plate 6 and the rotating shaft 17 which are cooled, it is possible to reduce the possibility of the occurrence of condensation. In addition, since the amount of air flowing toward the outside of the blowout port 4 is also increased, there is also an effect of preventing the intrusion of high temperature and high humidity air.

  Next, a fourth embodiment of the present invention will be described based on FIG. As described above, in the air conditioner in which the longitudinal length of the outlets 4 and 5 is long, the wind direction plate 6 adjusted to the length of the outlets 4 and 5 is used. In the case where the wind direction plate 6 is long, in order to support the wind direction plate 6, a rotary shaft support is provided in the middle of the wind direction plate 6. For this reason, it is difficult to form an air layer at this rotation shaft support portion because air turbulence is large, and high temperature / humid air at this portion directly contacts the rotation shaft portion cooled and causes condensation. The fear is high.

  Therefore, in the present embodiment, a protruding portion that produces the Coanda effect is formed on the upper side of the rotary shaft supporting portion provided in the middle of the wind direction plate 6 at the wall surface portion in the longitudinal direction of the blowout port 5. As a result, a large amount of cooled air can be supplied to the rotary shaft support provided in the middle of the wind direction plate 6, so that direct contact of high temperature / humid air is suppressed, and the risk of dew condensation can be reduced. become.

  In FIG. 9, an intermediate bearing portion 23 in which a bearing opening is formed is formed in the middle of the wind direction plate 6. The intermediate bearing portion 23 is rotatably supported by the rotation shaft support portion 25 provided on the longitudinal direction wall surface portion 24 forming the blowout port 5 in the longitudinal direction. Therefore, the intermediate bearing portion 23 can also be pivoted about the rotary shaft support portion 25 as the wind direction plate 6 pivots. As described above, the rotary shaft support 25 is provided in the middle of the wind direction plate 6. For this reason, it is difficult to form an air layer in the vicinity of the rotary shaft support portion 25 so that it is difficult to form an air layer, and high temperature / humid air at this portion is in contact with the vicinity of the rotary shaft support portion 25 directly cooled. The risk of dew condensation increases.

  In the present embodiment, as shown in FIG. 9, the longitudinal wall surface portion 24 on the upstream side of the rotary shaft support portion 25 is provided with a projecting portion 26 which produces the Coanda effect. Also in this embodiment, the projecting portion 26 is integrally formed with the longitudinal wall portion 24 by a synthetic resin. That is, it is integrally formed with the passage of the blower outlet 5 made of a material such as a synthetic resin. However, it is also possible to separately form the protruding portion 26 as in the first embodiment and fix it to the longitudinal wall portion 24 with a bolt or an adhesive.

  As shown in FIG. 9, the protrusion 26 that produces the Coanda effect has a predetermined length that straddles the rotation shaft support 25 on the upstream side of the rotation shaft support 25. A top surface 26A having a rectangular shape parallel to the wall surface 24 protruding in a direction away from the longitudinal wall 24 and a pair of lateral slopes extending laterally from both sides of the top 26A and connected to the longitudinal wall 24 A portion 26B, an upper slope portion 26CA extending upward from the top surface portion 21A and connected to the longitudinal wall surface portion 24, and a pair of upper slope portions 26B extending obliquely upward from the pair of lateral slope portions 26B and connected to the longitudinal wall surface portion 24. It comprises an upper side oblique direction slope portion 26CB, a top surface portion 26A, and a common lower side slope portion 26D extending downward from the pair of lateral direction slope portions 26B. The pair of lateral slopes 26B are formed in the shape of a triangle that is sharpened as they are separated from the top surface 26A. Further, since the projecting portion 26 is enlarged in shape, it can be formed into a cup shape of a truncated pyramid with the internal meat removed. This can reduce the weight.

  Therefore, the projecting portion 26 has a shape of a deformed triangular frustum obtained by deforming the triangular frustum. The projecting portion 26 of this deformed triangular frustum also produces a Coanda effect, and air is induced along the shape of the deformed triangular frustum. As shown in FIG. 9, the lower side of the air flow extends substantially horizontally.

  Thus, as shown in FIG. 9, the air flowing in the vicinity of the longitudinal wall surface portion 24 is, as shown by the thick arrow A, an upper slope portion 26CA, a pair of upper side slope direction slope portions 26CB, and a top surface portion 26A. The current flows along the pair of lateral slope portions 26B and the common lower slope portion 26D and flows to the rotary shaft support 25 side. As described above, since a large amount of cooled air can be supplied to the vicinity of the pivot support portion 25 of the wind direction plate 6 by the protrusion 26 producing the Coanda effect, an air layer of the cooled air is easily formed. Since the contact of the high temperature / humid air with the directly cooled wind direction plate 6 and the pivot support portion 25 is suppressed, the possibility of dew condensation can be reduced.

  Thus, by securing a large amount of air flow around the rotary shaft support 25 of the wind direction plate 6, a sufficient air layer is formed in the vicinity of the rotary shaft support 25 of the wind direction plate 6, so high temperature / humid air is direct Since it is suppressed from contacting the wind direction plate 6 and the rotating shaft 17 which are cooled, it is possible to reduce the possibility of the occurrence of condensation. In addition, since the amount of air flowing toward the outside of the blowout port 4 is also increased, there is also an effect of preventing the intrusion of high temperature and high humidity air.

  Next, the example which gave the protrusion which produces the Coanda effect mentioned above to the blower outlet 5 of a makeup panel is demonstrated using FIG. 10, FIG. Each projecting portion is integrally formed in the outlet 5 of the decorative panel. In order to manufacture by integral molding, the extraction direction of a shaping | molding die is only the up-down direction of FIG.10 and FIG.11. For this reason, the projecting portion is shaped to come off in the vertical direction.

  FIG. 10 is used for a product having a small air volume, and one wall surface portion of the longitudinal direction end portion 18 corresponding to the shaft support portions 17 at both ends of the wind direction plate 6 of the outlet 5 has a projecting shape shown in Example 1 The portion 20 is provided, and on the other side, the projecting portion 22 shown in the third embodiment is provided. Further, a protruding portion 26 shown in the fourth embodiment is provided in the vicinity of the center in the vicinity of the center, corresponding to the rotation shaft support 23.

  FIG. 11 is used for a product having a large air volume, and one of the wall surface portions of the longitudinal direction end portion 18 corresponding to the shaft support portions 17 at both ends of the wind direction plate 6 of the outlet 5 The part 20 is provided, and the other part is provided with the projecting part 21 shown in the second embodiment. Further, three projecting portions 26 shown in the fourth embodiment are provided corresponding to the plurality of rotation shaft support portions 23. In addition, in order to connect the drain pan 13 and the decorative panel 2 to the central projecting portion 26, a screwing hole is required, and the central portion of the projecting portion 26 is processed according to the screw for screwing. There is. Here, although the two-way cassette type ceiling-embedded air conditioner attached to the indoor ceiling is described as an example, the present invention is also applicable to air conditioners having other shapes.

  As described above, according to the present invention, the wall surface of the longitudinal side end of the air outlet forms a projecting portion which produces the Coanda effect above the shaft of the air direction plate, or the air direction plate with the wall surface in the longitudinal direction of the air outlet A protruding portion that produces the Coanda effect is formed on the upper side of the rotary shaft support portion provided in the middle of the above.

  According to this, since the projecting portion which produces the Coanda effect can supply a large amount of cooled air to the shaft portion of the wind direction plate at the longitudinal direction end of the blowout port or the rotary shaft support portion provided in the middle of the wind direction plate The direct contact between high temperature and high humidity air is suppressed, and the risk of dew condensation can be reduced.

  The present invention is not limited to the embodiments described above, but includes various modifications. For example, the embodiments described above are described in detail in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the configurations described. Also, part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. In addition, with respect to a part of the configuration of each embodiment, it is possible to add, delete, and replace other configurations.

  DESCRIPTION OF SYMBOLS 1 ... Unit main body, 2 ... Cosmetics panel, 3 ... Suction port, 4, 5 ... Blow-off port, 6, 7 ... Wind direction board, 8 ... Heat insulation material, 9 ... Airway, 10 ... Blowing fan, 11 ... Heat exchanger, 12: electric motor, 13: drain pan, 14: outer wall, 15: side wall, 16: outlet side opening, 17: rotation axis, 18: longitudinal end face, 18A: wall surface, 20, 21, 22, Reference numeral 26: projecting portion, 23: intermediate bearing portion, 24: longitudinal wall surface portion, 25: rotational shaft supporting portion.

Claims (5)

A unit body having an air inlet and an air outlet, an air passage provided inside the unit body and communicating the air inlet with the air outlet, a blower fan disposed in the air passage, and a heat An air conditioner comprising: an exchanger; and a wind direction plate disposed in the air outlet so as to change a blowing direction of the air and having a wind receiving surface for receiving the air,
To form a projecting portion in which the upper causing Coanda effect to the shaft portion of the wind direction plate in the wall of the longitudinal end portion of the air outlet, of the wind direction plate in the longitudinal direction of the longitudinal wall portion of the air outlet An air conditioner characterized in that a projecting portion which produces a Coanda effect is formed on the upper side of a rotating shaft support portion provided in the middle. In the air conditioner according to claim 1,
The projecting portion provided on the wall surface portion of the longitudinal side end portion protrudes in a direction away from the wall surface portion of the longitudinal side end portion, and is a top surface portion parallel to the wall surface portion of the longitudinal side end portion And an upper inclined surface extending upward from the top surface to be connected to the wall surface of the longitudinal end, and extending downward from the top surface to be connected to the wall surface at the longitudinal end An air conditioner characterized by comprising a lower slope portion. In the air conditioner according to claim 1,
The projecting portion provided on the upper side of the rotary shaft supporting portion provided in the middle of the wind direction plate at the longitudinal wall surface portion of the blowout port protrudes in a direction away from the longitudinal wall surface portion, and A parallel top surface portion, an upper slope portion extending upward from the top surface portion and connected to the longitudinal wall surface portion, and a lower slope surface portion extending downward from the top surface portion and connected to the longitudinal wall surface portion An air conditioner characterized by being. In the air conditioner according to claim 2 or 3,
The air conditioner according to claim 1, wherein the upper slope portion and the lower slope portion are formed in a plane shape or in a curved shape that bulges in a flowing direction of the air. The air conditioner according to any one of claims 1 to 4.
The protrusion formed on the wall surface of the longitudinal end of the outlet and the protrusion formed on the longitudinal wall of the outlet form a passage forming the outlet An air conditioner characterized by being integrally formed with the air conditioner.

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