JP6776531B2 - 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 has been 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 Unexamined Patent Publication No. 2015-094473

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

The present invention has been made in view of this point, and an object of the present invention is to provide an indoor unit of an air conditioner capable of avoiding direct contact of air blown out from an air outlet with a resident.

The first invention targets an indoor unit of an air conditioner that is installed on the ceiling (C) and blows harmonized air into the indoor space (S), and has a decorative panel (22) in which an outlet (26) is formed. A rotating shaft (51), a wind direction adjusting blade (53), and a support member (52) connecting an intermediate portion between both ends of the wind direction adjusting blade (53) in the horizontal direction and the rotating shaft (51). The decorative panel (22) is arranged on the inner peripheral side of the outlet (26), and is provided with a wind direction adjusting mechanism (50) for adjusting the wind direction of the harmonized air blown out from the outlet (26). , An inner panel portion (22a) forming an inner passage surface (63) facing the air outlet (26), and an outer side arranged on the outer peripheral side of the air outlet (26) and facing the air outlet (26). The rotation shaft (51) of the wind direction adjusting mechanism (50) is lower than the lower end of the outer passage surface (64) and has the outer panel portion (22b) forming the passage surface (64). It is configured to be higher than the lower end of the passage surface (63), and the outlet (26) constitutes an upstream passage (61) constituting an upstream portion of the outlet (26) and a downstream portion. The outer passage surface (64) includes a side wall portion (64a) facing the upstream passage (61) and a side wall portion (64a) facing the downstream passage (62). ) Includes an inner inclined portion (64b) that inclines diagonally downward from the lower end toward the outer peripheral side, and the wind direction adjusting blade (53) extends toward the outer peripheral side of the outlet (26). 56), the outer panel portion (22b) has an outer inclined portion (65) extending diagonally upward from the lower end of the inner inclined portion (64b) toward the outer peripheral side, and in the horizontal blowing operation, the above The angle θ1 of the extension portion (56) of the wind direction adjusting blade (53) with respect to the horizontal plane is equal to or less than the angle θ3 of the inwardly inclined portion (64b) with respect to the horizontal plane, and the extension portion of the wind direction adjusting blade (53). The tip of (56) is located on the outer peripheral side of the vertical plane a1 along the side wall portion (64a) , and the angle θ1 is equal to or greater than the angle θ2 of the outer inclined portion (65) with respect to the horizontal plane. It is characterized in that the position of the wind direction adjusting blade (53) is fixed .

In the first invention, the rotation shaft (51) of the wind direction adjusting mechanism (50) is located at a position lower than the lower end of the outer passage surface (64) of the outer panel portion (22b). As a result, the relative position of the wind direction adjusting blade (53) with respect to the air outlet (26) is also lowered. As a result, a sufficient flow path for guiding air to the outer peripheral side can be sufficiently secured between the wind direction adjusting blade (53) and the outer panel portion (22b). Therefore, it is possible to avoid that the velocity component in the horizontal direction of the blown airflow becomes large and the airflow that directly hits the occupants is formed.

In the second invention, in the first invention, when the air conditioner is stopped, the tip end (57) of the extension portion (56) is located on the outer peripheral side of the lower end of the outer passage surface (64). It is characterized by being.

In the second invention, when the air conditioner is stopped, the tip (57) of the extension portion (56) of the wind direction adjusting blade (53) is located on the outer peripheral side of the air outlet (26). As a result, when the air conditioner is stopped, the opening surface of the air outlet (26) can be reliably covered by the wind direction adjusting blade (53).

In the third invention, in the second invention, the wind direction adjusting blade (53) has the tip (57) of the extending portion (56) of the outer passage surface (64) during operation of the air conditioner. It is characterized in that it is located on the inner peripheral side of the lower end of the.

In the third invention, in the horizontal blowing operation, the tip end (57) of the extending portion (56) of the wind direction adjusting blade (53) does not extend to the outer peripheral side from the lower end of the outer passage surface (64). If the tip (57) of the extension portion (56) is extended too much, the air flowing above the extension portion (56) may be guided to the ceiling (C) side along the surface of the decorative panel (22). .. In this case, in the horizontal blowing operation, the blown airflow continuously flows on the surface of the ceiling (C), causing a problem that the ceiling (C) becomes dirty. On the other hand, in the present invention, the tip end (57) of the extension portion (56) is located on the inner peripheral side of the lower end of the outer passage surface (64). Therefore, it is possible to prevent the blown airflow from being guided to the ceiling (C) side.

In addition, by arranging the rotation shaft (51) below the outer passage surface (64), the extension portion (56) is at a relatively low position with respect to the decorative panel (22). Therefore, it is possible to prevent the air flowing above the extending portion (56) from propagating on the surface of the decorative panel (22), and it is possible to effectively avoid the ceiling stains.

In the fourth invention, in any one of the first to third inventions, a groove (66) on the panel side for holding dew condensation water is formed on the lower surface of the outer panel portion (22b) to adjust the wind direction. A groove (58) on the blade side for holding dew condensation water is formed on the lower surface of the blade (53), and the groove (66) on the panel side is exposed during the horizontal blowing operation, and when the air conditioner is stopped, the groove (66) on the panel side is exposed. The groove (66) on the panel side is covered by 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. ..

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

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

In the present invention, the rotation shaft (51) of the wind direction adjusting mechanism (50) is lower than the lower end of the outer passage surface (64) and higher than the lower end of the inner passage surface (63). As a result, a sufficient distance can be secured between the wind direction adjusting blade (53) and the outer panel portion (22b), and the blown airflow can be guided in the horizontal direction. As a result, it is possible to prevent the blown airflow from directly hitting the occupant, and the comfort of the occupant can be improved.

If it is desired to arrange the wind direction adjusting blade (53) downward with respect to the air outlet (26), it is conceivable to make the support member (52) relatively long. However, if the support member (52) is lengthened, the angle of the wind direction adjusting blade (53) changes significantly when the wind direction adjusting blade (53) is displaced. As a result, the wind direction adjusting blade (53) easily interferes with the outer panel portion (22b) and the inner panel portion (22a). On the other hand, if the rotation shaft (51) is lowered as in the present invention, the position of the wind direction adjusting blade (53) can be set low without lengthening the support member (52). Therefore, the air can be guided in the horizontal direction while avoiding the wind direction adjusting blade (53) from interfering with other members.

According to the second invention, when the air conditioner is stopped, the wind direction adjusting blade (53) can cover the entire air outlet (26). This makes it possible to improve the aesthetic appearance of the indoor unit for the occupants.

According to the third invention, it is possible to prevent the blown airflow from being guided to the ceiling (C) side during the horizontal blowing operation, and to avoid the dirt on the ceiling (C).

In the fourth invention, by forming grooves (58,66) in both the outer panel portion (22b) and the wind direction adjusting blade (53), the outer panel portion (22b) and the wind direction adjusting blade (53) are formed. It is possible to prevent the condensed water generated on the surface from dripping downward.

Further, even if the air conditioner is stopped and the horizontal blowing operation is switched, the position of the groove (58,66) visually recognized by the occupants does not change. Therefore, it is possible to prevent the occupants from feeling uncomfortable due to such switching, and it is possible to improve the aesthetic appearance.

FIG. 1 is a perspective view of the indoor unit of the embodiment as viewed from diagonally below. FIG. 2 is a schematic plan view of the indoor unit in which the top plate of the casing main body is omitted. FIG. 3 is a schematic cross-sectional view of the indoor unit showing the III-O-III cross section of FIG. FIG. 4 is a schematic bottom view of the indoor unit. FIG. 5 is a block diagram showing the configuration of the controller. FIG. 6 is a cross-sectional view taken along the line VII-VII of FIG. 4, showing the wind direction adjusting blades at the horizontal blowing position. FIG. 7 is a cross-sectional view taken along the line VII-VII of FIG. 4, showing the wind direction adjusting vanes at the bottom blow position. FIG. 8 is a cross-sectional view taken along the line VII-VII of FIG. 4, showing the wind direction adjusting blade at the stop position. FIG. 9 is a diagram schematically showing the 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. It should be noted that the embodiments and modifications described below are essentially preferred examples and are not intended to limit the scope of the present invention, its applications, or its uses.

<Composition 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 the 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) is composed of a casing body (21) and a decorative panel (22). The casing (20) houses an indoor fan (31), an indoor heat exchanger (32), a drain pan (33), and a bell mouth (36).

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

[Indoor fan]
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 arranged in the center of the inside of the casing main body (21). The indoor fan (31) is driven by the indoor fan motor (31a). The indoor fan motor (31a) is fixed to the central part of the top plate (21a).

[Bellmouth]
The bell mouth (36) is located 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 a 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 arranged so as to surround the periphery of the indoor fan (31). That is, the indoor heat exchanger (32) is located in the secondary space (21d). The indoor heat exchanger (32) exchanges heat with the refrigerant in the refrigerant circuit for the air passing from the inside to the outside.

[Drain pan]
The drain pan (33) is a member made of so-called Styrofoam. As shown in FIG. 3, the drain pan (33) is arranged so as to close the lower end of the casing main body (21). A water receiving groove (33b) along the lower end of the indoor heat exchanger (32) is formed on the upper surface of the drain pan (33). The lower end of the indoor heat exchanger (32) is inserted into 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) is formed with four main outlet passages (34) and four sub outlet passages (35). The main outlet passage (34) and the sub outlet passage (35) are passages through which air passes through the indoor heat exchanger (32) and penetrate the drain pan (33) in the vertical direction. The main outlet passage (34) is a rectangular through hole having an elongated cross section. One main outlet passage (34) is arranged along each of the four sides of the casing body (21). The secondary outlet passage (35) is a rectangular through hole having a slightly curved cross section. One secondary outlet passage (35) is arranged at each of the four corners of the casing body (21). That is, in the drain pan (33), the main outlet passage (34) and the sub outlet passage (35) are alternately arranged along the peripheral edge thereof.

[Cosmetic panel]
The decorative panel (22) is a resin member formed in the shape of a square thick plate. The lower part of the decorative panel (22) is formed in a square shape that is one size 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). Further, 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 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). 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, one square suction port (23) is formed in the central portion of the inner panel portion (22a). The suction port (23) penetrates the inner panel portion (22a) up and down 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). The suction port (23) is provided with a grid-like suction grill (41). Further, a suction filter (42) is arranged above the suction grill (41).

A substantially square ring-shaped air outlet (26) is formed between the inner panel portion (22a) and the outer panel portion (22b) so as to surround the suction port (23). As shown in FIG. 4, the outlet (26) is divided into four main outlets (24) and four secondary outlets (25).

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

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

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

As shown in FIG. 6, an upstream passage (61) and a downstream passage (62) are formed inside the main outlet 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 (width in the left-right direction in FIG. 6) of the upstream passage (61) 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) diagonally penetrates the decorative panel (22) from the upper end to the lower end so as to approach the outer edge of the decorative panel (22). The width of the flow path of the downstream passage (62) gradually increases from the upstream end to the downstream end.

As shown in FIG. 6, an inner passage surface (63) facing the main blowout opening (24) is formed on 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 formed in a substantially vertical flat shape. The second inner wall portion (63b) is formed in a curved surface shape so as to approach the outer edge of the decorative panel (22) from the upper end to 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 portion (64a) is formed in a substantially vertical flat shape. 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 diagonally upward from the lower end of the inner inclined portion (64b) toward the outer peripheral side. A plurality of (three in this example) grooves (66) (panel grooves) are formed at the lower end of the outer inclined portion (65). Each groove (66) extends along the side of the outlet (26). Each groove (66) holds the condensed water generated on the surface of the outer panel portion (22b) by surface tension. As a result, it is possible to prevent the dew condensation water on the surface of the outer panel portion (22b) from dripping.

[Wind direction adjustment mechanism]
The wind direction adjusting mechanism (50) adjusts the direction (direction of the blown airflow) of the conditioned air 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). A rotation shaft (51), a support member (52), and a wind direction adjusting blade (53) are provided one by one corresponding to each of the four main blowout openings (24).

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

The support member (52) is an arm that connects the rotation shaft (51) and 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 an elongated plate shape extending from one end to the other end in the longitudinal direction of the main blowout opening (24) of the decorative panel (22). As shown in FIG. 3, the wind direction adjusting blade (53) is rotatably supported by the support member (52) around the rotation shaft (51). The wind direction adjusting blade (53) is curved so that its cross section (cross section orthogonal to the longitudinal direction) is convex in the direction away from the rotation axis (51).

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

A plurality of (three in this example) grooves (58) (blade grooves) are formed in the lower portion of the tip (57) of the extending portion (56). Each groove (58) extends in the longitudinal direction of the wind direction adjusting blade (53). Each groove (58) holds the dew condensation water generated on the surface of the wind direction adjusting blade (53) by surface tension. As a result, it is possible to prevent the dew condensation water on the surface of the wind direction adjusting blade (53) from dripping.

<Control>
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 horizontal blowing operation state (the state shown in FIG. 6) and the lower blowing operation state (the state shown in 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 has the upper limit height of the movable range during the operation of the air conditioner in the horizontal blowing operation. Further, the wind direction adjusting blade (53) of the present embodiment has a lower limit height of a movable range during operation of the air conditioner in the lower blowing operation. The wind direction control unit (91) can individually control the position of each wind direction adjustment blade (53). Further, the wind direction control unit (91) sets the wind direction adjusting blade (53) to the stop position (state in FIG. 8) when the air conditioner is stopped.

As schematically shown in FIG. 9, the wind direction control unit (91) adjusts the wind direction adjusting blade (53) at at least six stages (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 the present embodiment). P5 corresponds to the position (lower limit height position) of the downward blowing operation of the wind direction adjusting blade (53). Δθ indicates the movable range of the wind direction adjusting blade during the operation of the air conditioner. The wind direction adjusting blade (53) can also be adjusted to three positions (P2, P3, and P4) between P1 and P2 during operation of the air conditioner.

<Dimensional relationship between wind direction adjustment blades 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. Let a1 be the vertical plane along the side wall portion (64a), and let a2 be the vertical plane passing through the boundary between the inner inclined portion (64b) and the outer inclined portion (65). 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 extending portion (56) of the wind direction adjusting blade (53) with respect to the horizontal plane is θ1, and the angle of the outer inclined portion (65) is 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 extension portion (56) of the wind direction adjusting blade (53) has the following arrangement. The tip (57) of the extending portion (56) is at a position lower than h1 and h2. That is, the tip (57) of the extension portion (56) is located below the decorative panel (22). The tip (57) of the extension portion (56) is located between a1 and a2. That is, the tip (57) of the extension portion (56) is located below the inwardly inclined portion (64b). In other words, the tip (57) of the extension portion (56) is located closer to the inner peripheral side of the air outlet (26) than the lower end of the outer slope portion (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 axial center P of the rotating shaft (51) has the following positional relationship with the decorative panel (22). The axial center 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 axial center P is higher than h2. That is, the axial center P is located higher than the lower end of the inner passage surface (63).

<Operating operation of air conditioner>
While the indoor unit (10) is in operation, 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 goes to the four main outlet passages (34) and the four auxiliary outlet passages (35). It flows in separately. The air flowing into the main outlet passage (34) is blown out to the indoor space (S) through the main outlet opening (24). The air flowing into the sub-blow-out passage (35) is blown out to the indoor space (S) through the sub-blow-out 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 wind direction adjustment blade>
When the air conditioner is in operation, the wind direction adjusting blade (53) rotates around the rotation shaft (51) to change the direction of the blown airflow. The wind direction adjusting blade (53) during 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. 7. When the air conditioner is stopped, the wind direction adjusting blade (53) is in 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 portion (56) of the wind direction adjusting blade (53) is located below the inwardly inclined portion (64b). That is, in the wind direction adjusting blade (53) during the horizontal blowing operation, the tip (57) of the extending portion (56) is located between a1 and a2.

For example, when the tip (57) of the extension portion (56) is located on the inner peripheral side (left side in FIG. 6) of a1, the air flowing out of the main outlet opening (24) is sent to the outer peripheral side of the outlet (26). It becomes difficult to guide. That is, the horizontal velocity component of the blown airflow becomes small, and the air easily hits the occupants directly.

Further, for example, when the tip (57) of the extension portion (56) is located on the outer peripheral side (right side in FIG. 6) of a2, the air flow between the extension portion (56) and the outer inclined portion (65). A road is formed. In this case, the air flowing above the extending portion (56) is guided diagonally upward along the outer inclined portion (65), and easily reaches the surface of the ceiling (C). Therefore, the continuous horizontal blowing operation causes a problem that the ceiling (C) surface becomes dirty.

On the other hand, in the present embodiment, since the tip (57) of the extending portion (56) is located on the outer peripheral side of a1, the horizontal velocity component of the blown airflow becomes large, and the blown airflow is sent to the occupants. You can avoid hitting it directly. Therefore, it is possible to suppress the occupants from feeling the draft.

Further, since the tip (57) of the extending portion (56) is located on the inner peripheral side of a2, it is possible to prevent the blown airflow from being guided diagonally upward along the surface of the outer inclined portion (65). Therefore, it is possible to prevent the blown airflow from being guided to the ceiling (C) side, and it is possible to suppress the contamination of the ceiling (C) surface.

The angle θ1 of the extending portion (56) with respect to the horizontal plane is equal to or greater than the angle θ2 of the outer inclined portion (65) with respect to the horizontal plane. If the angle θ1 is too small, the air passing above the extension portion (56) tends to reach the outer inclined portion (65) side, and eventually is easily guided to the ceiling (C) side. On the other hand, by setting θ1 ≧ θ2, it is possible to reliably prevent the blown airflow from being guided to the ceiling (C) side along the outer inclined portion (65).

The angle θ1 of the extending portion (56) with respect to the horizontal plane is equal to or less than the angle θ3 of the inwardly inclined portion (64b) with respect to the horizontal plane. If the angle θ1 is too large, the air passing above the extension portion (56) may flow downward and directly hit the occupant. On the other hand, by setting θ1 ≦ θ3, it is possible to surely prevent the blown airflow from hitting the occupants.

In the present embodiment, the axis P of the rotation shaft (51) of the wind direction adjusting mechanism (50) is positioned between h1 and h2. When the axis P1 of the rotating shaft (51) is lower than h1, the distance between the outer panel portion (22b) and the extending portion (56) can be secured to some extent. As a result, a sufficient blowout airflow flowing between the outer panel portion (22b) and the extension portion (56) can be sufficiently secured, and the horizontal velocity component of the blowout airflow can be further increased. Therefore, it is possible to more reliably prevent the blown airflow from directly hitting the occupants.

By making the extending portion (56) relatively low with respect to the outer inclined portion (65), it is possible to prevent the blown airflow from being guided to the surface of the outer inclined portion (65). Therefore, the effect of preventing ceiling stains can be further improved.

By making the axis P1 of the rotating shaft (51) higher than h2, it is possible to avoid impairing the function of guiding the blown airflow by the wind direction adjusting blade (53).

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

[Stop position]
When the air conditioner is stopped, the wind direction adjusting blade (53) is in the stop position shown in FIG. In this state, the tip (57) of the extending portion (56) of the wind direction adjusting blade (53) is located below the outer inclined portion (65). As a result, the main blow-out opening (24) is completely closed by the wind direction adjusting blade (53). As a result, the aesthetic appearance of the indoor unit (10) is improved.

When the air conditioner is stopped, the blade groove (58) of the wind direction adjusting blade (53) generally overlaps the panel groove (66) of the decorative panel (22) in the vertical direction. That is, in the air conditioner of the present embodiment, the position of the panel groove (66) visually recognized by the occupant during operation (see FIGS. 6 and 7) and the blade groove (58) visually recognized by the occupant when stopped. (See FIG. 8) substantially coincides with the position of the decorative panel (22) in the circumferential direction. Therefore, the position of the groove (58,66) visually recognized by the occupant does not change significantly with the ON / OFF of the operation of the air conditioner. Therefore, it is possible to prevent the occupants from feeling uncomfortable with the ON / OFF of the air conditioner, and it is possible to improve the aesthetic appearance.

As described above, the wind direction adjusting blade (53) has a length until the main outlet opening (24) is closed. That is, the wind direction adjusting blade (53) has a length sufficient to sufficiently increase the horizontal velocity component of the blown airflow in the horizontal blowing operation.

-Effect of embodiment-
In the present embodiment, in the horizontal blowing operation, since the tip (57) of the extending portion (56) of the wind direction adjusting blade (53) is positioned below the inwardly inclined portion (64b), the blowing airflow can be guided in the horizontal direction. .. As a result, it is possible to prevent the blown airflow from directly hitting the occupant, and the comfort of the occupant can be improved. Further, in this way, it is possible to prevent the blown airflow from flowing along the ceiling (C), so that it is possible to prevent the ceiling (C) from becoming dirty due to the blown airflow.

When the air conditioner is stopped, the wind direction adjusting blade (53) can cover the entire outlet (26). As a result, the aesthetic appearance of the indoor unit can be improved for the occupants.

As shown in FIG. 6, by setting the angle θ1 of the extending portion (56) to be equal to or greater than the angle θ2 of the outer inclined portion (65) and equal to or less than the angle θ3 of the inner inclined portion (64b), the blown airflow can be made to the ceiling ( It is possible to surely avoid flowing along C), and it is possible to surely prevent the blown airflow from directly hitting the occupants.

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

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

The wind direction adjusting blade (53) may have a configuration in which the tip end (57) of the wind direction adjusting blade (53) is located on the outer peripheral side of the lower end of the outer passage surface (64) in the horizontal blowing operation. Further, the wind direction adjusting blade (53) may have a configuration in which the lower end of the wind direction adjusting blade (53) is located on the inner peripheral side of the lower end of the side wall portion (64a).

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 conditioned in one direction, for example. It may be configured to blow out air.

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

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

As described above, the present invention is useful for indoor units of air conditioners.

C ceiling
S Indoor space
22 Decorative panel
22a Inner panel
22b outer panel
26 outlet
50 Wind direction adjustment mechanism
51 Rotating shaft
52 Support member
53 Wind direction adjustment blade
56 Extension
57 tip
58 groove
63 Inner passage surface
64 Outer passage surface
66 groove

Claims (4)

An indoor unit of an air conditioner installed on the ceiling (C) that blows conditioned air into the indoor space (S).
The decorative panel (22) on which the air outlet (26) is formed, and
A rotating shaft (51), a wind direction adjusting blade (53), and a support member (52) connecting an intermediate portion between both ends of the wind direction adjusting blade (53) in the width direction and the rotating shaft (51). It is equipped with a wind direction adjustment mechanism (50) that adjusts the wind direction of the conditioned air blown out from the outlet (26).
The above decorative panel (22) is
An inner panel portion (22a) arranged on the inner peripheral side of the outlet (26) and forming an inner passage surface (63) facing the outlet (26).
It has an outer panel portion (22b) that is arranged on the outer peripheral side of the air outlet (26) and forms an outer passage surface (64) facing the air outlet (26).
The rotation shaft (51) of the wind direction adjusting mechanism (50) is configured to be lower than the lower end of the outer passage surface (64) and higher than the lower end of the inner passage surface (63).
The outlet (26) includes an upstream passage (61) constituting the upstream portion of the outlet (26) and a downstream passage (62) constituting the downstream portion.
The outer passage surface (64) faces the side wall portion (64a) facing the upstream passage (61) and the downstream passage (62), and faces the lower end of the side wall portion (64a) toward the outer peripheral side. Including the inner slope (64b) that slopes diagonally downward,
The wind direction adjusting blade (53) has an extension portion (56) extending in the direction of the outer peripheral side of the outlet (26).
The outer panel portion (22b) has an outer inclined portion (65) extending diagonally upward from the lower end of the inner inclined portion (64b) toward the outer peripheral side.
In the horizontal blowing operation, the angle θ1 of the extension portion (56) of the wind direction adjusting blade (53) with respect to the horizontal plane is equal to or less than the angle θ3 of the inwardly inclined portion (64b) with respect to the horizontal plane, and the wind direction adjusting blade (53). ) Is located on the outer peripheral side of the vertical plane a1 along the side wall portion (64a) , and the angle θ1 is the angle θ2 with respect to the horizontal plane of the outer inclined portion (65). An indoor unit of an air conditioner characterized by fixing the position of the wind direction adjusting blade (53) as described above . In claim 1,
The indoor unit of the air conditioner, characterized in that the tip (57) of the extension portion (56) is located on the outer peripheral side of the lower end of the outer passage surface (64) when the air conditioner is stopped. .. In claim 2,
The wind direction adjusting blade (53)
The air conditioner is characterized in that the tip (57) of the extension portion (56) is located on the inner peripheral side of the lower end of the outer passage surface (64) during operation of the air conditioner. Indoor unit. In any one of claims 1 to 3,
A groove (66) on the panel side for holding dew condensation water is formed on the lower surface of the outer panel portion (22b).
A groove (58) on the blade side for holding condensed water is formed on the lower surface of the wind direction adjusting blade (53).
During the horizontal blowing operation, the groove (66) on the panel side is exposed.
When the air conditioner is stopped, the groove (66) on the panel side is covered by the wind direction adjusting blade (53), and the groove (58) on the blade side is vertically aligned with the groove (66) on the panel side. An indoor unit of an air conditioner characterized by overlapping.

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