JP6233398B2 - Indoor unit of air conditioner - Google Patents

Description

    The present invention relates to an indoor unit of an air conditioner.

    Conventionally, an indoor unit of an air conditioner as disclosed in Patent Document 1 is known. The indoor unit is installed near the ceiling. The indoor unit blows heated or cooled air into the indoor space as conditioned air.

Japanese Patent Laying-Open No. 2015-094473

    The indoor unit as described above includes a plurality of air outlets, and blows out air from these air outlets. For example, if the cooled air continues to directly hit the occupant, the occupant may feel uncomfortable.

    In order to solve such a problem, it is also conceivable to adopt a structure for guiding the flow of air blown out from the blowout port (also referred to as blown airflow) to the ceiling side as much as possible. However, if the blown air flow is simply guided to the ceiling side, a blown air flow is formed along the ceiling surface, which causes a problem that the ceiling is likely to become dirty.

    The present invention has been made in view of such a point, and an object of the present invention is to provide air conditioning that can prevent the air blown from the outlet from directly hitting the occupant and prevent the ceiling from being soiled by the air. It is to provide an indoor unit of the apparatus.

    A first invention is directed to an indoor unit of an air conditioner that is installed on a ceiling (C) and blows out conditioned air to an indoor space (S), and a decorative panel (22) in which an air outlet (26) is formed, A wind direction adjusting blade (53) that adjusts the wind direction of the conditioned air blown from the air outlet (26), and the decorative panel (22) is an inner panel portion formed on the inner peripheral side of the air outlet (26) (22a) and an outer panel (22b) formed on the outer peripheral side of the outlet (26), and the outer panel (22b) is an inner wall of the upstream part (61) of the outlet (26) A side wall portion (64a) constituting the inner slope portion and an inner slope portion constituting the inner wall of the downstream portion (62) of the outlet (26) extending obliquely downward from the lower end of the side wall portion (64a) toward the outer peripheral side. 64b) and an outer inclined portion (65) extending obliquely upward from the lower end of the inner inclined portion (64b) toward the outer peripheral side and facing the indoor space (S), The direction adjusting blade (53) has an extending part (56) extending in the direction of the outer peripheral side of the air outlet (26), and the tip of the extending part (56) when the air conditioner is stopped (57) is positioned below the outer inclined portion (65), and the tip (57) of the extending portion (56) is positioned below the inner inclined portion (64b) in the horizontal blowing operation. It is characterized by that.

    In the first invention, the extending portion (56) is formed in the wind direction adjusting blade (53). In a horizontal blowing operation in which air is blown out horizontally from the blower outlet (26), the tip (57) of the extending part (56) is positioned below the inner inclined part (64b). That is, in this operation, the tip (57) of the extension part (56) is positioned on the outer peripheral side of the side wall part (64a). For this reason, the air that has passed through the upstream portion (61) and the downstream portion (62) of the blower outlet (26) in this order passes between the inner inclined portion (64b) and the extending portion (56), and in the horizontal direction. To be guided to. That is, in the present invention, since the wind direction adjusting blade (53) is extended to the outer peripheral side rather than the case where the tip (57) of the wind direction adjusting blade (53) is located on the inner peripheral side with respect to the side wall (64a), The velocity component in the horizontal direction increases. Thereby, it is possible to avoid the formation of an airflow that directly hits the occupant.

    Further, in the horizontal blowing operation, the tip (57) of the extension part (56) of the wind direction adjusting blade (53) is located on the inner peripheral side with respect to the outer inclined part (65). If the tip (57) of the extension part (56) of the airflow direction adjusting blade (53) is extended below the outer slope part (65), the blown airflow is extended between the extension part (56) and the outer slope part (65). Be guided during. In this case, the blown airflow is guided to the ceiling (C) side along the outer inclined portion (65), and there is a possibility that an airflow along the ceiling (C) surface is formed. On the other hand, in the present invention, since the tip (57) of the extending portion (56) extends only to the lower side of the inner inclined portion (64b), it is possible to avoid the blowing airflow being guided to the ceiling (C) side. .

    When the air conditioner is stopped, the tip (57) of the extending part (56) of the wind direction adjusting blade (53) is positioned below the outer inclined part (65). Thereby, when the air conditioner is stopped, the opening surface of the air outlet (26) can be reliably covered with the wind direction adjusting blade (53).

    According to a second aspect of the present invention, in the first aspect, the wind direction adjusting blade (53) is an upper limit height position of a movable range of the air direction adjusting blade (53) during the operation of the air conditioner in the horizontal blowing operation. It is comprised so that.

    Here, the “movable range” means a movable range of the wind direction adjusting blade (53) in a state where air is blown out from the outlet (26) during operation of the air conditioner. That is, this “movable range” does not mean the movable range of the wind direction adjusting blade (53) when the air conditioner stops.

    In the second invention, the horizontal blowing operation is performed when the wind direction adjusting blade (53) is at the upper limit height position of the movable range during operation of the air conditioner. In this operation, the tip (57) of the extending part (56) of the wind direction adjusting blade (53) is positioned below the inner inclined part (64b), and the blown airflow is guided in the horizontal direction.

    According to a third aspect of the present invention, in the first or second aspect, the extension part (56) of the airflow direction adjusting blade (53) has an upper surface (56a) of the extension part (56) in the horizontal blowing operation. The angle θ1 extends obliquely downward so as to form an angle θ1 with respect to the horizontal plane, and the angle θ1 is not less than an angle θ2 with respect to the horizontal plane of the outer inclined portion (65).

    The extension part (56) of the wind direction adjusting blade (53) of the third invention extends obliquely downward, and the upper surface (56a) of the extension part (56) forms an angle θ1 with respect to the horizontal plane. This angle θ1 is equal to or larger than the angle θ2 with respect to the horizontal plane of the inner inclined portion (64b). Thus, by relatively increasing the angle θ1, it is possible to avoid the air flowing along the extending portion (56) being guided to the outer inclined portion (65) side. As a result, it is possible to prevent the blown airflow from being guided to the ceiling (C) side along the surface of the outer inclined portion (65).

    According to a fourth aspect of the present invention, in the first or second aspect, the extended portion (56) of the airflow direction adjusting blade (53) has an upper surface (56a) of the extended portion (56) in the horizontal blowing operation. It extends obliquely downward so as to form an angle θ1 with respect to the horizontal plane, and the angle θ1 is not more than an angle θ3 with respect to the horizontal plane of the inner inclined portion (64b).

    The extension part (56) of the wind direction adjusting blade (53) of the fourth invention extends obliquely downward, and the upper surface (56a) of the extension part (56) forms an angle θ1 with respect to the horizontal plane. This angle θ1 is the same as or smaller than the angle θ3 with respect to the horizontal plane of the outer inclined portion (65). Thus, by making the angle θ1 relatively small, it is possible to avoid the air flowing along the extending portion (56) being guided toward the occupant.

    According to a fifth aspect of the present invention, in the first or second aspect, the extension part (56) of the airflow direction adjusting blade (53) has an upper surface (56a) of the extension part (56) in the horizontal blowing operation. The angle θ1 extends obliquely downward so as to form an angle θ1 with respect to the horizontal plane, and the angle θ1 is not less than an angle θ2 with respect to the horizontal plane of the outer inclined portion (65) and an angle θ3 with respect to the horizontal plane of the inner inclined portion (64b). It is characterized by the following.

    In the fifth invention, by setting the angle θ1 to be not less than the angle θ2 and not more than the angle θ3, it is more effectively avoided that the blown airflow directly hits the occupant and the ceiling dirt is more effectively avoided. it can.

    In a sixth aspect based on any one of the first to fifth aspects, a groove (66) on the panel side for holding condensed water is formed on the lower surface of the outer panel (22b), and the wind direction adjustment is performed. A blade-side groove (58) for holding condensed water is formed on the lower surface of the blade (53). During the horizontal blowing operation, the panel-side groove (66) is exposed, and when the air conditioner is stopped. The groove (66) on the panel side is covered with the wind direction adjusting blade (53), and the groove (58) on the blade side overlaps the groove (66) on the panel side in the vertical direction. To do.

    In the sixth invention, a groove (66) is formed on the lower surface of the outer panel portion (22b). For this reason, when dew condensation water is generated on the surface of the outer panel portion (22b), the dew condensation water can be held inside the groove (66) on the panel side by surface tension. Further, a groove (58) is formed on the lower surface of the wind direction adjusting blade (53). For this reason, when condensed water is generated on the surface of the wind direction adjusting blade (53), the condensed water can be held inside the blade-side groove (58) by surface tension.

    During the horizontal blowing operation, the groove (66) on the panel side is exposed. For this reason, when the occupant looks at the decorative panel (22), the groove (66) on the panel side is visually recognized. On the other hand, when the air conditioner is stopped, the wind direction adjusting blade (53) is positioned to cover the groove (66) on the panel side. At this time, the blade-side groove (58) overlaps the panel-side groove (66) in the vertical direction. For this reason, even if the stop of the air conditioner and the horizontal blowing operation are switched to each other, the position of the groove (58, 66) visually recognized by the occupant does not change greatly.

    In the present invention, in the horizontal blowing operation, the tip (57) of the extending part (56) of the wind direction adjusting blade (53) is positioned below the inner inclined part (64b), so that the blown airflow can be guided in the horizontal direction. As a result, it can be avoided that the blown airflow directly hits the occupant and the comfort of the occupant can be improved. Moreover, since it can avoid that a blowing airflow flows along a ceiling (C) if it does in this way, it can also prevent that a ceiling (C) gets dirty with a blowing airflow.

    When the air conditioner is stopped, the entire air outlet (26) can be covered by the wind direction adjusting blade (53). Thereby, the beauty | look of the indoor unit with respect to a resident can be improved.

    In 2nd invention, when a wind direction adjustment blade | wing (53) exists in the upper limit height of a movable range, a blowing airflow can be guided to a horizontal direction.

    In 3rd invention, it can avoid reliably that blowing airflow flows along a ceiling (C) by making angle (theta) 1 into more than angle (theta) 2.

    In 4th and 5th invention, it can avoid reliably that a blowing airflow hits a resident directly by setting angle (theta) 1 to angle (theta) 3 or less.

    In the sixth invention, grooves (58, 66) are formed in both the outer panel portion (22b) and the wind direction adjusting blade (53), so that the outer panel portion (22b) and the wind direction adjusting blade (53) It can suppress that the dew condensation water which generate | occur | produced on the surface dripped below.

    In addition, even when the air conditioner is stopped and the horizontal blowing operation is switched, the position of the groove (58, 66) visually recognized by the occupant hardly changes. For this reason, it can be avoided that the occupants feel uncomfortable with such switching, and the aesthetics can be improved.

Drawing 1 is a perspective view which looked at the indoor unit of an embodiment from the slanting lower part. FIG. 2 is a schematic plan view of the indoor unit in which the top plate of the casing body is omitted. FIG. 3 is a schematic cross-sectional view of the indoor unit showing a cross section taken along the line III-O-III in FIG. 2. FIG. 4 is a schematic bottom view of the indoor unit. FIG. 5 is a block diagram showing the configuration of the controller. 6 is a cross-sectional view taken along the line VII-VII in FIG. 4 and shows the airflow direction adjusting blade in the horizontal blowing position. FIG. 7 is a cross-sectional view taken along the line VII-VII in FIG. 4 and shows the wind direction adjusting blade in the lower blowing position. FIG. 8 is a cross-sectional view taken along the line VII-VII in FIG. 4 and shows the wind direction adjusting blade in the stop position. FIG. 9 is a diagram schematically illustrating an adjustable position of the wind direction adjusting blade according to the embodiment.

    Embodiments of the present invention will be described in detail with reference to the drawings. Note that the embodiments and modifications described below are essentially preferable examples, and are not intended to limit the scope of the present invention, its application, or its use.

<Configuration of indoor unit>
As shown in FIG. 1, the indoor unit (10) of the present embodiment is configured as a so-called ceiling-embedded type. This indoor unit (10) constitutes an air conditioner together with an outdoor unit (not shown). In the air conditioner, a refrigerant circuit is formed in which the refrigerant circulates and performs a refrigeration cycle by connecting the indoor unit (10) and the outdoor unit with a connecting pipe.

    As shown in FIGS. 2 and 3, the indoor unit (10) includes a casing (20), an indoor fan (31), an indoor heat exchanger (32), a drain pan (33), and a bell mouth (36). And a controller (90).

〔casing〕
The casing (20) is installed on the ceiling (C) of the indoor space (S). The casing (20) includes a casing body (21) and a decorative panel (22). The casing (20) accommodates an indoor fan (31), an indoor heat exchanger (32), a drain pan (33), and a bell mouth (36).

    The casing body (21) is inserted and arranged in an opening formed in the ceiling (C) of the indoor space (S). The casing body (21) is formed in a substantially rectangular parallelepiped box shape whose bottom surface is open. The casing body (21) includes a substantially flat top plate (21a) and a side plate (21b) extending downward from the peripheral edge of the top plate (21a).

[Indoor fans]
As shown in FIG. 3, the indoor fan (31) is a centrifugal blower that blows out air sucked from below toward the outside in the radial direction. The indoor fan (31) is disposed at the center inside the casing body (21). The indoor fan (31) is driven by the indoor fan motor (31a). The indoor fan motor (31a) is fixed to the center of the top plate (21a).

[Bellmouth]
The bell mouth (36) is disposed below the indoor fan (31). The bell mouth (36) is a member for guiding the air flowing into the casing (20) to the indoor fan (31). The bell mouth (36), together with the drain pan (33), positions the internal space of the casing (20) on the primary space (21c) located on the suction side of the indoor fan (31) and on the blowout side of the indoor fan (31) It is divided into secondary space (21d).

[Indoor heat exchanger]
The indoor heat exchanger (32) is a so-called cross fin type fin-and-tube heat exchanger. As shown in FIG. 2, the indoor heat exchanger (32) is formed in a square shape in a plan view, and is disposed so as to surround the periphery of the indoor fan (31). That is, the indoor heat exchanger (32) is arranged in the secondary space (21d). The indoor heat exchanger (32) causes the air passing from the inside to the outside to exchange heat with the refrigerant in the refrigerant circuit.

[Drain pan]
The drain pan (33) is a so-called styrene foam member. As shown in FIG. 3, the drain pan (33) is disposed so as to close the lower end of the casing body (21). On the upper surface of the drain pan (33), a water receiving groove (33b) is formed along the lower end of the indoor heat exchanger (32). The lower end portion of the indoor heat exchanger (32) enters the water receiving groove (33b). The water receiving groove (33b) receives the drain water generated in the indoor heat exchanger (32).

    As shown in FIG. 2, the drain pan (33) has four main outlet passages (34) and four auxiliary outlet passages (35). The main outlet passage (34) and the auxiliary outlet passage (35) are passages through which air that has passed through the indoor heat exchanger (32) flows, and penetrate the drain pan (33) in the vertical direction. The main blow-out passage (34) is a through hole having a rectangular cross section. One main outlet passage (34) is arranged along each of the four sides of the casing body (21). The sub blow-out passage (35) is a rectangular through hole having a slightly curved cross section. One sub blowing passage (35) is disposed at each of the four corners of the casing body (21). That is, in the drain pan (33), the main blowing passages (34) and the sub blowing passages (35) are alternately arranged along the periphery thereof.

[Decorative panel]
The decorative panel (22) is a resin member formed in a square thick plate shape. The lower part of the decorative panel (22) is formed in a square shape that is slightly larger than the top plate (21a) of the casing body (21). The decorative panel (22) is arranged so as to cover the lower surface of the casing body (21). Moreover, the lower surface of the decorative panel (22) constitutes the lower surface of the casing (20) and is exposed to the indoor space (S).

    The decorative panel (22) has an inner panel part (22a) formed on the inner peripheral side of the blower outlet (26) and an outer panel part (22b) formed on the outer peripheral side of the blower outlet (26). The inner panel portion (22a) and the outer panel portion (22b) are formed in a substantially square frame shape.

    As shown in FIGS. 3 and 4, a single suction port (23) having a square shape is formed in the central portion of the inner panel portion (22 a). The suction port (23) penetrates the inner panel portion (22a) vertically and communicates with the primary space (21c) inside the casing (20). The air sucked into the casing (20) flows into the primary space (21c) through the suction port (23). A lattice-shaped suction grille (41) is provided at the suction port (23). A suction filter (42) is disposed above the suction grille (41).

    Between the inner panel part (22a) and the outer panel part (22b), a substantially square ring-shaped outlet (26) is formed so as to surround the inlet (23). As shown in FIG. 4, the air outlet (26) is divided into four main air outlets (24) and four sub air outlets (25).

    The main outlet opening (24) is an elongated opening corresponding to the cross-sectional shape of the main outlet passage (34). One main outlet opening (24) is arranged along each of the four sides of the decorative panel (22).

    The main blowout opening (24) of the decorative panel (22) has a one-to-one correspondence with the main blowout passage (34) of the drain pan (33). Each main outlet opening (24) communicates with a corresponding main outlet passage (34).

    The sub blowout opening (25) is a 1/4 arc-shaped opening. One sub blowing opening (25) is arranged at each of the four corners of the decorative panel (22). The sub-blowing opening (25) of the decorative panel (22) has a one-to-one correspondence with the sub-blowing passageway (35) of the drain pan (33).

    As shown in FIG. 6, an upstream passage (61) and a downstream passage (62) are formed in the main blowout opening (24).

    The upstream passage (61) constitutes an upstream portion formed at the upstream end of the main outlet opening (24). The upstream passage (61) penetrates the decorative panel (22) up and down. The width of the flow path of the upstream passage (61) (the width in the left-right direction in FIG. 6) is substantially constant from the upstream end to the downstream end.

    The downstream passage (62) is continuous with the lower end of the upstream passage (61) and constitutes a downstream portion formed at the downstream end of the main outlet opening (24). The downstream passage (62) obliquely penetrates the decorative panel (22) so as to approach the outer edge of the decorative panel (22) as it goes from the upper end to the lower end. The width of the flow path of the downstream passage (62) gradually increases from the upstream end toward the downstream end.

    As shown in FIG. 6, an inner passage surface (63) facing the main blowout opening (24) is formed at the outer edge of the inner panel portion (22a). The inner passage surface (63) includes a first inner wall portion (63a) facing the upstream passage (61) and a second inner wall portion (63b) facing the downstream passage (62). The first inner wall portion (63a) is configured in a substantially vertical planar shape. The second inner wall portion (63b) is formed in a curved shape so as to approach the outer edge of the decorative panel (22) from the upper end toward the lower end.

    As shown in FIG. 6, an outer passage surface (64) facing the main blowout opening (24) is formed on the inner edge of the outer panel portion (22b). The outer passage surface (64) includes a side wall portion (64a) facing the upstream passage (61) and an inner inclined portion (64b) facing the downstream passage (62). The side wall (64a) is configured in a substantially vertical plane. The inner inclined portion (64b) is inclined obliquely downward from the lower end of the side wall portion (64a) toward the outer peripheral side. The angle at which the inner inclined portion (64b) bends with respect to the side wall portion (64a) is larger than the angle at which the outer inclined portion (65) bends with respect to the side wall portion (64a).

    The outer panel portion (22b) is formed with an outer inclined portion (65) facing the indoor space (S). The outer inclined portion (65) extends obliquely upward from the lower end of the inner inclined portion (64b) toward the outer peripheral side. Three grooves (66) (panel grooves) are formed on the lower surface of the lower end of the outer inclined portion (65). Each groove (66) extends along the side of the air outlet (26). Each groove (66) holds condensed water generated on the surface of the outer panel (22b) by surface tension. Thereby, it can prevent that the dew condensation water on the surface of an outer panel part (22b) dripping. The number of the grooves (66) is merely an example, and may be one, two, four or more.

(Wind direction adjustment mechanism)
The wind direction adjusting mechanism (50) adjusts the direction of the conditioned air flow (the direction of the blown air flow) blown out from the main blowout opening (24). The wind direction adjusting mechanism (50) has a rotating shaft (51), a support member (52), and a wind direction adjusting blade (53). The rotating shaft (51), the support member (52), and the wind direction adjusting blade (53) are provided one by one so as to correspond to each of the four main blow-out openings (24).

    The rotation shaft (51) extends in the longitudinal direction of the main outlet opening (24) so as to be along the side of the main outlet opening (24). The rotation shaft (51) is disposed inside the main blowout opening (24) (more strictly, inside the downstream passage (62)). The rotating shaft (51) is rotationally driven by a drive motor (54) (see FIG. 4).

    The support member (52) is an arm that connects the rotating shaft (51) and the wind direction adjusting blade (53). One end of the support member (52) is connected to the rotating shaft (51), and the other end of the support member (52) is connected to an intermediate portion between both ends in the width direction of the wind direction adjusting blade (53).

    The wind direction adjusting blade (53) adjusts the direction of the blown airflow in the vertical direction. The wind direction adjusting blade (53) is formed in a long and narrow plate shape extending from one end to the other end in the longitudinal direction of the main outlet opening (24) of the decorative panel (22). As shown in FIG. 3, the wind direction adjusting blade (53) is supported by the support member (52) so as to be rotatable about the rotation shaft (51). The wind direction adjusting blade (53) is curved so that the shape of its transverse cross section (cross section orthogonal to the longitudinal direction) is convex in the direction away from the rotating shaft (51).

    In the wind direction adjusting blade (53) in the state of the horizontal blowing operation (the state shown in FIG. 6), the portion located inside the outlet (26) forms the base portion (55), and the remaining portion is the extension portion (56). ). In the horizontal blowing operation, the base (55) has a shape along the second inner wall (63b). That is, the base (55) during the horizontal blowing operation is formed substantially parallel to the second inner wall (63b). In the horizontal blowing operation, the extending part (56) extends from the lower end opening surface of the air outlet (26) to the indoor space (S) toward the outer peripheral side of the air outlet (26).

    A plurality (three in this example) of grooves (58) (blade grooves) are formed below the tip (57) of the extension part (56). Each groove (58) extends in the longitudinal direction of the wind direction adjusting blade (53). Each groove (58) retains the condensed water generated on the surface of the wind direction adjusting blade (53) by surface tension. Thereby, it can prevent that the dew condensation water on the surface of a wind direction adjustment blade | wing (53) dripping.

<Controller>
The controller (90) is configured to control the operation of the indoor unit (10). As shown in FIG. 5, the controller (90) includes a wind direction control unit (91). The wind direction control unit (91) is configured to control the position of the wind direction adjusting blade (53) by operating the drive motor (54). Specifically, the wind direction control unit (91) rotates between the state of the horizontal blowing operation (state of FIG. 6) and the state of the lower blowing operation (state of FIG. 7) during the operation of the air conditioner. The position (angle) of the wind direction adjusting blade (53) is controlled within the range. That is, the wind direction adjusting blade (53) of the present embodiment is the upper limit height of the movable range during operation of the air conditioner in the horizontal blowing operation. Further, the wind direction adjusting blade (53) of the present embodiment becomes the lower limit height of the movable range during operation of the air conditioner in the lower blowing operation. Further, the wind direction control unit (91) sets the wind direction adjusting blade (53) to the stop position (state of FIG. 8) when the air conditioner is stopped.

    As schematically shown in FIG. 9, the wind direction control section (91) adjusts the wind direction adjusting blade (53) at at least six positions (P0 to P5). P0 corresponds to the stop position of the wind direction adjusting blade (53). P1 corresponds to the position of the horizontal blowing operation of the wind direction adjusting blade (53) (the upper limit height position according to this embodiment). P5 corresponds to the position (lower limit height position) of the downward blowing operation of the wind direction adjusting blade (53). Δθ represents the movable range of the wind direction adjusting blades during operation of the air conditioner. The wind direction adjusting blade (53) can be adjusted to three positions (P2, P3, and P4) between P1 and P2 during operation of the air conditioner.

    The wind direction control unit (91) can individually control the position of each wind direction adjusting blade (53).

<Dimensional relations of wind direction adjusting blade and decorative panel>
As shown in FIG. 6, the height of the lower end of the outer passage surface (64) is h1, and the height of the lower end of the inner passage surface (63) is h2. A vertical plane along the side wall (64a) is defined as a1, and a vertical plane passing through the boundary between the inner inclined section (64b) and the outer inclined section (65) is defined as a2. In the state where the air conditioner performs the horizontal blowing operation (the state shown in FIG. 6), the angle of the upper surface (56a) of the extension part (56) of the wind direction adjusting blade (53) with respect to the horizontal plane is θ1, and The angle with respect to the horizontal plane is θ2, and the angle of the inner inclined portion (64b) with respect to the horizontal plane is θ3.

    In the state where the air conditioner performs the horizontal blowing operation (the state shown in FIG. 6), the tip (57) of the extending portion (56) of the wind direction adjusting blade (53) is arranged as follows. The tip (57) of the extension part (56) is at a position lower than h1 and h2. That is, the tip (57) of the extension part (56) is positioned below the decorative panel (22). The tip (57) of the extension part (56) is located between a1 and a2. That is, the tip (57) of the extension part (56) is located below the inner inclined part (64b). In other words, the tip (57) of the extension part (56) is located closer to the inner peripheral side of the outlet (26) than the lower end of the outer inclined part (65).

    The angle θ1 at which the extending portion (56) is inclined downward is larger than the angle θ2 at which the outer inclined portion (65) is inclined. The angle θ1 is smaller than the angle θ3 at which the inner inclined portion (64b) is inclined. The angle θ3 is larger than the angle θ2. The angle θ1 may be the same as the angle θ2. The angle θ1 may be the same as the angle θ3. The angle θ2 may be the same as the angle θ3.

    The positional relationship between the axis P of the rotating shaft (51) and the decorative panel (22) is as follows. The axis P is lower than h1. That is, the axis P is at a position lower than the lower end of the outer passage surface (64). The axis P is higher than h2. That is, the axis P is at a position higher than the lower end of the inner passage surface (63).

<Operation of air conditioner>
During the operation of the indoor unit (10), the indoor fan (31) rotates. When the indoor fan (31) rotates, the indoor air in the indoor space (S) flows into the primary space (21c) in the casing (20) through the suction port (23). The air flowing into the primary space (21c) is sucked into the indoor fan (31) and blown out to the secondary space (21d).

    The air flowing into the secondary space (21d) is cooled or heated while passing through the indoor heat exchanger (32), and then to the four main outlet passages (34) and the four auxiliary outlet passages (35). It flows in divided. The air flowing into the main outlet passage (34) is blown out into the indoor space (S) through the main outlet opening (24). The air that has flowed into the auxiliary blowing passage (35) is blown out into the indoor space (S) through the auxiliary blowing opening (25).

    In the indoor unit (10) during the cooling operation, the indoor heat exchanger (32) functions as an evaporator, and the air is cooled while passing through the indoor heat exchanger (32). On the other hand, in the indoor unit (10) during the heating operation, the indoor heat exchanger (32) functions as a condenser, and the air is heated while passing through the indoor heat exchanger (32).

<Operation of the wind direction adjusting blade>
During operation of the air conditioner, the direction of the blown airflow is changed by the wind direction adjusting blade (53) rotating around the rotating shaft (51). The wind direction adjusting blade (53) during the operation of the air conditioner is between the position during the horizontal blowing operation (horizontal blowing position shown in FIG. 6) and the position during the lower blowing operation (lower blowing position shown in FIG. 7). Can be moved. That is, the movable range of the wind direction adjusting blade (53) during operation of the air conditioner is between the horizontal blowing position shown in FIG. 6 and the lower blowing position shown in FIG. When the air conditioner is stopped, the wind direction adjusting blade (53) is at the stop position (closed position) shown in FIG.

[Horizontal blowing position]
In the horizontal blowing operation, the wind direction adjusting blade (53) is in the horizontal blowing position shown in FIG. In this state, the tip (57) of the extending part (56) of the wind direction adjusting blade (53) is positioned below the inner inclined part (64b). That is, the tip (57) of the extension part (56) of the wind direction adjusting blade (53) during the horizontal blowing operation is located between a1 and a2.

    For example, when the tip (57) of the extension part (56) is located on the inner peripheral side (left side in FIG. 6) from a1, the air that has flowed out of the main outlet opening (24) is moved to the outer peripheral side of the outlet (26). It becomes difficult to guide. That is, the velocity component in the horizontal direction of the blown-out airflow becomes small, and air easily hits the occupant directly.

    For example, when the tip (57) of the extension part (56) is positioned on the outer peripheral side (right side in FIG. 6) of a2, the air flow between the extension part (56) and the outer inclined part (65) A path is formed. In this case, the air flowing on the upper side of the extension part (56) is guided obliquely upward along the outer inclined part (65) and easily reaches the surface of the ceiling (C). Therefore, the problem that the ceiling (C) surface becomes dirty due to the continuous horizontal blowing operation.

    On the other hand, in this embodiment, since the front-end | tip (57) of an extension part (56) is located in an outer peripheral side rather than a1, the velocity component of the horizontal direction of a blowing airflow becomes large, and a blowing airflow is present to a resident. You can avoid hitting it directly. Therefore, it is possible to prevent the occupant from feeling a draft.

    Moreover, since the front-end | tip (57) of the extension part (56) is located in an inner peripheral side rather than a2, it can avoid that a blowing airflow guides diagonally upward along the surface of an outer inclination part (65). Therefore, it is possible to prevent the blown airflow from being guided to the ceiling (C) side, and as a result, contamination of the ceiling (C) surface can be suppressed.

    The angle θ1 with respect to the horizontal plane of the extension part (56) is equal to or larger than the angle θ2 with respect to the horizontal plane of the outer inclined part (65). If the angle θ1 is too small, the air passing above the extension part (56) is likely to reach the outer inclined part (65) side, and as a result, is easily guided to the ceiling (C) side. In contrast, by setting θ1 ≧ θ2, it is possible to reliably prevent the blown airflow from being guided to the ceiling (C) side through the outer inclined portion (65).

    An angle θ1 of the extending part (56) with respect to the horizontal plane is not more than an angle θ3 with respect to the horizontal plane of the inner inclined part (64b). If the angle θ1 is too large, the air passing above the extension part (56) may flow downward and directly hit the occupant. In contrast, by setting θ1 ≦ θ3, it is possible to reliably prevent the blown airflow from hitting the occupant.

    In the present embodiment, the axis P of the rotating shaft (51) of the wind direction adjusting mechanism (50) is positioned between h1 and h2. When the axis P1 of the rotation shaft (51) is lower than h1, a certain distance between the outer panel portion (22b) and the extension portion (56) can be secured. Thereby, the blowing airflow which flows between an outer panel part (22b) and the extension part (56) can fully be ensured, and the speed component of the horizontal direction of a blowing airflow can further be increased. Therefore, it is possible to more reliably prevent the blown airflow from directly hitting the occupant.

    Since the extension part (56) is positioned relatively low with respect to the outer inclined part (65), it is also possible to avoid that the blown airflow is guided to the surface of the outer inclined part (65). Therefore, the effect of preventing ceiling dirt can be further improved.

    By making the axis P1 of the rotation shaft (51) higher than h2, it is possible to avoid the function of guiding the blown air flow by the wind direction adjusting blade (53) being impaired.

[Bottom blowing position]
In the bottom blowing operation, the wind direction adjusting blade (53) is in the bottom blowing position shown in FIG. In this state, the tip (57) of the extending part (56) of the wind direction adjusting blade (53) is located on the inner peripheral side of a1. The air that has flowed out of the main outlet opening (24) is mainly guided downward.

(Stop position)
When the air conditioner is stopped, the wind direction adjusting blade (53) is at the stop position shown in FIG. In this state, the tip (57) of the extending part (56) of the wind direction adjusting blade (53) is positioned below the outer inclined part (65). As a result, the main outlet opening (24) is completely closed by the wind direction adjusting blade (53). As a result, the beauty of the indoor unit (10) is improved.

    Thus, the wind direction adjusting blade (53) has a length until the main blowout opening (24) is closed. That is, the wind direction adjusting blade (53) has a length that can sufficiently increase the horizontal velocity component of the blown airflow in the horizontal blowing operation.

    When the air conditioner is stopped, the blade groove (58) of the wind direction adjusting blade (53) substantially overlaps the panel groove (66) of the decorative panel (22) in the vertical direction. That is, the air conditioner of the present embodiment has the position of the panel groove (66) that the occupant visually recognizes during operation (see FIGS. 6 and 7) and the blade groove (58) that the occupant visually recognizes when stopped. (See FIG. 8) substantially coincides with the circumferential direction of the decorative panel (22). For this reason, the position of the groove | channel (58,66) which an in-room person visually recognizes does not change greatly with ON / OFF of the driving | operation of an air conditioning apparatus. Therefore, it is possible to prevent the occupant from feeling uncomfortable with the ON / OFF of the air conditioner, and to improve the beauty.

-Effect of the embodiment-
In the present embodiment, in the horizontal blowing operation, the tip (57) of the extension part (56) of the wind direction adjusting blade (53) is positioned below the inner inclined part (64b), so that the blown airflow can be guided in the horizontal direction. . As a result, it can be avoided that the blown airflow directly hits the occupant and the comfort of the occupant can be improved. Moreover, since it can avoid that a blowing airflow flows along a ceiling (C) if it does in this way, it can also prevent that a ceiling (C) gets dirty with a blowing airflow.

    When the air conditioner is stopped, the entire air outlet (26) can be covered by the wind direction adjusting blade (53). Thereby, the beauty | look of the indoor unit with respect to a resident can be improved.

    As shown in FIG. 6, by setting the angle θ1 of the extending portion (56) to be not less than the angle θ2 of the outer inclined portion (65) and not more than the angle θ3 of the inner inclined portion (64b), the blown airflow is C) can be reliably avoided, and the blown airflow can be reliably avoided from directly hitting the occupants.

    As shown in FIG. 6, by making the axis P of the rotating shaft (51) lower than h1 and higher than h2, it is possible to more reliably avoid the blown airflow directly hitting the occupant. In addition, it is possible to more reliably avoid the blown airflow flowing along the ceiling (C).

<< Other Embodiments >>
The horizontal blowing operation shown in FIG. 6 is performed at the upper limit height position of the movable range of the wind direction adjusting blade (53) during the operation of the air conditioner. However, a horizontal blowing operation may be performed at an intermediate position of the movable range.

    In each of the above embodiments, the indoor unit (10) is configured to blow out conditioned air in four directions, but may be configured to blow out conditioned air in two directions, or harmonized in one direction. It may be configured to blow out air.

    In each of the above embodiments, the sub-blowing opening (25) and the sub-blowing passageway (35) may be omitted.

    The axis P of the rotating shaft (51) may be at a position higher than the lower end of the outer passage surface (64).

    The indoor unit (10) may be of any type as long as it is installed near the ceiling. For example, the indoor unit (10) may be a ceiling hanging type.

    As described above, the present invention is useful for an indoor unit of an air conditioner.

C Ceiling
S Indoor space
22 Decorative panel
22a Inner panel
22b Outer panel
26 Air outlet
53 Wind adjustment blade
56 Extension
56a Top view
57 Tip
58 groove
61 Upstream passage (upstream)
62 Downstream passage (downstream)
64a Side wall
64b Inner slope
65 Outer slope
66 groove

Claims (6)

An indoor unit of an air conditioner that is installed on the ceiling (C) and blows out conditioned air to the indoor space (S),
A decorative panel (22) in which an air outlet (26) is formed;
A wind direction adjusting blade (53) for adjusting the wind direction of the conditioned air blown out from the air outlet (26),
The decorative panel (22) includes an inner panel portion (22a) formed on the inner peripheral side of the air outlet (26), and an outer panel portion (22b) formed on the outer peripheral side of the air outlet (26). Have
The outer panel (22b)
A side wall part (64a) constituting the inner wall of the upstream part (61) of the outlet (26);
An inner inclined part (64b) that extends obliquely downward from the lower end of the side wall part (64a) toward the outer peripheral side and constitutes an inner wall of the downstream part (62) of the outlet (26);
An outer inclined portion (65) extending obliquely upward from the lower end of the inner inclined portion (64b) toward the outer peripheral side and facing the indoor space (S),
The wind direction adjusting blade (53)
Having an extension part (56) extending in the direction of the outer peripheral side of the outlet (26),
When the air conditioner is stopped, the tip (57) of the extension part (56) is positioned below the outer inclined part (65), and the tip (57) of the extension part (56) in the horizontal blowing operation. Is configured to be positioned below the inner inclined portion (64b). In claim 1,
The wind direction adjusting blade (53) is configured to be an upper limit height position of a movable range of the wind direction adjusting blade (53) during operation of the air conditioner in the horizontal blowing operation. Indoor unit of air conditioner. In claim 1 or 2,
The extension part (56) of the wind direction adjusting blade (53) extends obliquely downward so that the upper surface (56a) of the extension part (56) forms an angle θ1 with respect to the horizontal plane in the horizontal blowing operation. And
The said angle (theta) 1 is more than the angle (theta) 2 with respect to the horizontal surface of the said outer inclination part (65). The indoor unit of the air conditioning apparatus characterized by the above-mentioned. In claim 1 or 2,
The extension part (56) of the wind direction adjusting blade (53) extends obliquely downward so that the upper surface (56a) of the extension part (56) forms an angle θ1 with respect to the horizontal plane in the horizontal blowing operation. And
The indoor unit of the air conditioner, wherein the angle θ1 is an angle θ3 or less with respect to the horizontal plane of the inner inclined portion (64b). In claim 1 or 2,
The extension part (56) of the wind direction adjusting blade (53) extends obliquely downward so that the upper surface (56a) of the extension part (56) forms an angle θ1 with respect to the horizontal plane in the horizontal blowing operation. And
The indoor unit of the air conditioner, wherein the angle θ1 is not less than an angle θ2 with respect to the horizontal plane of the outer inclined portion (65) and not more than an angle θ3 with respect to the horizontal plane of the inner inclined portion (64b). In any one of Claims 1 thru | or 5,
On the lower surface of the outer panel part (22b), a groove (66) on the panel side for holding condensed water is formed,
On the lower surface of the wind direction adjusting blade (53), a blade-side groove (58) for holding condensed water is formed,
During the horizontal blowing operation, the groove (66) on the panel side is exposed,
When the air conditioner is stopped, the panel-side groove (66) is covered with the wind direction adjusting blade (53), and the blade-side groove (58) is perpendicular to the panel-side groove (66). An indoor unit of an air conditioner characterized by overlapping.

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