JP6004062B2 - Air conditioner indoor unit - Google Patents

Description

  The present invention relates to an indoor unit of an air conditioner, and more particularly to an indoor unit of an air conditioner provided on a ceiling.

  Conventionally, it is known to provide an indoor unit of an air conditioner on a ceiling. For example, Patent Document 1 discloses a ceiling-embedded air conditioner that includes a unit casing in which a lower portion is opened and a blower and a heat exchanger are disposed inside, and a decorative panel provided in a lower portion of the unit casing. (Indoor unit) is described. Moreover, in the air conditioner of patent document 1, the front panel is engage | inserted by the suction inlet formed in the center part of the decorative panel. The front panel is suspended and supported by a lifting device attached to the decorative panel so as to be lifted and lowered via a wire. When the operation of the air conditioner is stopped, the lifting device winds the wire and raises the front panel, the front panel is accommodated in the suction port of the decorative panel, and the suction port is closed. On the other hand, during operation of the air conditioner, the lifting device feeds the wire and lowers the front panel, and a gap serving as a suction opening is formed between the front panel and the decorative panel.

JP 2008-261519 A

  However, in the air conditioner of Patent Document 1, only the front panel (grill) is suspended by the wire, and the front is driven by the air flow sucked from the gap (suction opening) between the decorative panel and the front panel. The panel may shake. For this reason, it is difficult to stabilize the support of the front panel.

  In addition, in the air conditioner of patent document 1, in order to stabilize the support of the front panel at the time of driving | operation, it is possible to reduce the downward | lowering amount of the front panel at the time of driving | operation. However, if the lowering amount of the front panel is reduced, the opening area of the gap (suction opening) between the decorative panel and the front panel becomes narrow, and the ventilation resistance at the suction opening increases. For this reason, the amount of work required to suck air in the indoor unit (specifically, the number of rotations of the fan) may increase, and noise in the indoor unit may increase.

  Accordingly, an object of the present invention is to provide an indoor unit of an air conditioner that can stabilize support of a grill while suppressing an increase in ventilation resistance at the suction opening.

1st invention is an indoor unit of the air conditioner provided in a ceiling (CE), Comprising: It has an indoor fan (31) and an indoor heat exchanger (32) inside, and is provided in the said ceiling (CE) The indoor unit main body (20) for adjusting the temperature of the air sucked from below and blowing it out, and a decorative panel (50) provided at the lower part of the indoor unit main body (20), the decorative panel (50), A panel main body (51) in which an air suction port (51a) penetrating vertically is formed at the center, and an air outlet (51b) penetrating vertically is formed around the air suction port (51a); A first extension portion (54a) extending from the inner peripheral portion of the air suction port (51a) to the inner peripheral side, and the first extension portion (54a) are formed integrally with the first extension portion (54a). 54a) a suspension support portion (54) having a second extension portion (54b) extending downward from the tip end portion thereof, and a second of the suspension support portion (54). Connected to the lower end of the extension (54b) and disposed at the lower end of the air suction port (51a), the suction opening (between the outer peripheral edge and the opening edge of the air suction port (51a) in plan view ( 60), a plate-shaped grille (52) covering the central portion of the air suction port (51a), and a plate member (53) disposed on the inner periphery of the air suction port (51a). The plate member (53) is formed in a plate shape extending along the inner circumference of the air suction port (51a), and the air suction is arranged such that the upper edge is located on the inner circumference side of the lower edge. It is arranged on the inner periphery of the mouth (51a), its upper edge is located above the lower end of the air inlet (51a), and its lower edge surrounds the outer periphery of the grill (52) in plan view, The first extending portion (54a) of the lower support portion (54) has a lower portion formed in a shape corresponding to the outer peripheral surface of the plate member (53), and an outer peripheral surface of the plate member (53) at the lower portion. Is an indoor unit of an air conditioner characterized by being connected .

In the first invention, the grill (52) is supported by using the suspension support portion (54), thereby making the grill (52) stronger than when the grill (52) is suspended by the wire. Can be supported. In addition, the grill (52) is connected to the air suction port (51a) so that the suction opening (60) is formed between the outer peripheral edge of the grill (52) and the opening edge of the air suction port (51a) in plan view. By covering the central part, the opening area of the suction opening (60) can be secured. Thus, the grill (52) can be firmly supported while ensuring the opening area of the suction opening (60) .

Further, in the first invention, by providing the plate member (53), it is difficult to see the internal parts of the indoor unit (10) from the suction opening (60) while securing the opening area of the suction opening (60). it is possible.

In the first invention, the lower portion of the first extension portion (54a) of the suspension support portion (54) is formed in a shape corresponding to the outer peripheral surface of the plate member (53), and the plate member (53) By connecting the outer peripheral surfaces, the connection area between the suspension support portion (54) and the plate member (53) can be increased. Thereby, the connection intensity | strength between a suspension support part (54) and a board member (53) can be improved.

According to the first invention, the grill (52) can be firmly supported while securing the opening area of the suction opening (60), and therefore the grill ( 52) support can be stabilized .

In addition, according to the first invention, it is possible to make the internal parts of the indoor unit (10) less visible from the suction opening (60) while securing the opening area of the suction opening (60). ), The design of the decorative panel (50) can be improved while suppressing an increase in ventilation resistance.

Further , according to the first invention, since the connection strength between the suspension support portion (54) and the plate member (53) can be improved, the plate member (53) by the suspension support portion (54). The support of can be strengthened.

The perspective view which showed the external appearance of the indoor unit of the air conditioner by Embodiment 1. FIG. The longitudinal cross-sectional view which showed the structural example of the indoor unit of Embodiment 1. FIG. FIG. 3 is a bottom view illustrating a configuration example of a decorative panel according to the first embodiment. FIG. 3 is a top view illustrating a configuration example of a decorative panel according to the first embodiment. The fragmentary perspective view for demonstrating the principal part of the decorative panel of Embodiment 1. FIG. The fragmentary longitudinal cross-sectional view for demonstrating the principal part of the decorative panel of Embodiment 1. FIG. The figure for demonstrating in detail the principal part of the decorative panel of Embodiment 1. FIG. The longitudinal cross-sectional view for demonstrating the flow of the air in an indoor unit. The fragmentary longitudinal cross-sectional view for demonstrating the modification 1 of a board member. The fragmentary longitudinal cross-sectional view for demonstrating the modification 2 of a board member. The fragmentary longitudinal cross-sectional view for demonstrating the modification 3 of a board member. The longitudinal cross-sectional view for demonstrating the modification of a decorative panel. The top view for demonstrating the modification 1 of a suspension support part. The fragmentary perspective view for demonstrating the modification 2 of a suspension support part. The fragmentary perspective view for demonstrating the modification 3 of a suspension support part. The fragmentary longitudinal cross-sectional view for demonstrating the modification 3 of a suspension support part. The fragmentary perspective view for demonstrating the modification 4 of a suspension support part. The fragmentary longitudinal cross-sectional view for demonstrating the modification 4 of a suspension support part. The longitudinal cross-sectional view which showed the modification of the indoor unit of the air conditioner by Embodiment 2. FIG. The fragmentary perspective view for demonstrating the principal part of the decorative panel of Embodiment 2. FIG. The fragmentary longitudinal cross-sectional view for demonstrating the principal part of the decorative panel of Embodiment 2. FIG.

  Hereinafter, embodiments will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and description thereof will not be repeated.

(Embodiment 1)
FIG. 1 shows a configuration example of an indoor unit (10) of an air conditioner according to the first embodiment. The indoor unit (10) is provided on the ceiling (CE) of the room that is subject to air conditioning, and is connected to an outdoor unit (not shown) provided outside of the room by piping to form an air conditioner. In this air conditioner, air conditioning operations such as cooling operation and heating operation are performed.

  As shown in FIGS. 1-4, the indoor unit (10) is provided with the indoor unit main body (20), the chamber (40), and the decorative panel (50). In this example, the indoor unit (10) is suspended by a suspension mechanism (not shown) in the space above the ceiling (CE) (that is, the back of the ceiling). FIG. 1 is a perspective view showing the indoor unit (10) as viewed obliquely from below. FIG. 2 is a longitudinal sectional view showing a longitudinal section of the indoor unit (10), and corresponds to a longitudinal sectional view taken along line II-II in FIG. FIG. 3 is a bottom view showing the decorative panel (50) viewed from below. FIG. 4 is a top view showing the decorative panel (50) as viewed from above.

[Indoor unit body]
The indoor unit body (20) has an indoor fan (31) and indoor heat exchanger (32) inside, and is provided on the ceiling (CE). The temperature of the air sucked from below is adjusted and blown out. Has been. In this example, the indoor unit main body (20) includes a casing (21), a drain pan (33), and a bell mouth (34) in addition to the indoor fan (31) and the indoor heat exchanger (32).

<casing>
The casing (21) is formed in a rectangular parallelepiped box shape whose bottom surface is open. A heat insulating material (not shown) is provided on the inner surface of the casing (21). The casing (21) accommodates the indoor fan (31), the indoor heat exchanger (32), the drain pan (33), and the bell mouth (34).

<Indoor fan>
The indoor fan (31) is disposed at the center inside the casing (21). In this example, the indoor fan (31) is configured to blow out the air sucked from below from the side to the outside in the radial direction. Specifically, the indoor fan (31) has a fan motor (31a) and an impeller (31b). The fan motor (31a) is fixed to the top plate of the casing (21), and the impeller (31b) is connected to the rotating shaft of the fan motor (31a).

<Indoor heat exchanger>
The indoor heat exchanger (32) is disposed so as to surround the indoor fan (31) and is configured to exchange heat between the refrigerant and the air conveyed by the indoor fan (31). For example, the indoor heat exchanger (32) is configured by a cross fin type fin-and-tube heat exchanger. In addition, an indoor heat exchanger (32) provided in the indoor unit (10), a compressor, an outdoor heat exchanger, and an expansion valve provided in the outdoor unit (not shown) are connected by piping to form a refrigerant circuit. Has been. In this refrigerant circuit, a refrigerant is reversibly circulated to perform a vapor compression refrigeration cycle. The indoor heat exchanger (32) functions as an evaporator in the cooling operation to cool the air, and functions as a radiator (condenser) in the heating operation to heat the air.

<Drain pan>
The drain pan (33) is formed in a flat straight rectangular parallelepiped vertically, it is arranged below the indoor heat exchanger (32). The drain pan (33) is formed with one air inlet (33a), a plurality (four in this example) of air outlets (33b), and a drain groove (33c). The air inlet (33a) is formed at the center of the drain pan (33) and penetrates the drain pan (33) up and down. The four air outlets (33b) are formed around the air inlet (33a) and penetrate the drain pan (33) up and down. The drain groove (33c) is formed in an annular shape along the lower end of the indoor heat exchanger (32) and receives condensed water generated in the indoor heat exchanger (32). In this example, the four air outlets (33b) are formed along the four sides of the drain pan (33) in plan view. Further, the drain groove (33c) extends in an annular shape between the air inlet (33a) and the four air outlets (33b) in a plan view.

<Bellmouth>
The bell mouth (34) is formed in a cylindrical shape whose opening area increases from the upper edge toward the lower edge, and the upper edge is inserted into the lower opening (suction port) of the indoor fan (31). The air is introduced into the air inlet (33a) of the drain pan (33).

[Chamber]
Chamber (40) is formed in a flat straight rectangular parallelepiped vertically, it is arranged below the indoor unit body (20). The chamber (40) is formed with one suction communication port (40a) and a plurality of (four in this example) outlet communication ports (40b). The suction communication port (40a) is formed in the central portion of the chamber (40), penetrates the chamber (40) vertically and communicates with the air introduction port (33a) of the drain pan (33). The four outlet communication ports (40b) are formed around the suction communication port (40a) and penetrate the chamber (40) vertically to communicate with the four air outlet ports (33b) of the drain pan (33). Yes. In this example, the four outlet communication ports (40b) are formed along the four sides of the chamber (40) in plan view.

[Decorative panel]
The decorative panel (50) is provided below the indoor unit body (20) with the chamber (40) interposed therebetween. The decorative panel (50) includes a panel body (51), a grille (52), a plate member (53), a plurality of (four in this example) suspension support portions (54), a filter ( 55) and a plurality (four in this example) of wind direction adjusting blades (56).

<Panel body>
Panel body (51) is formed in a flat straight rectangular parallelepiped vertically. The panel main body (51) is formed with one air inlet (51a) and a plurality (four in this example) of air outlets (51b). In this example, the panel body (51) is formed in a square shape in plan view. In addition, the panel body (51) has a flat bottom surface with a central portion on the lower surface (specifically, a portion located inside the four air outlets (51b)), and an outer peripheral edge portion on the lower surface. Is formed in an inclined surface shape that gently inclines upward toward the outer periphery.

  The air suction port (51a) is formed at the center of the panel main body (51) and penetrates the panel main body (51) vertically to communicate with the suction communication port (40a) of the chamber (40). That is, the air suction port (51a) communicates with the air introduction port (33a) of the drain pan (33) via the suction communication port (40a) of the chamber (40). In this example, the air suction port (51a) is formed in a square shape in plan view. The air suction port (51a) is formed so that the opening area is the same from the upper end to the lower end.

  The four air outlets (51b) are formed around the air inlet (51a), penetrate the panel body (51) vertically and communicate with the four outlet communication ports (40b) of the chamber (40). Yes. That is, the four air outlets (51b) communicate with the four air outlets (33b) of the drain pan (33) via the four outlet communication ports (40b) of the chamber (40). In this example, the four air outlets (51b) are formed along the four sides of the panel body (51).

  In the following description, the side close to the center of the air suction port (51a) in plan view is referred to as “inner side”, and the side far from the center of the air suction port (51a) in plan view is “outer side”. Is written.

<grill>
The grill (52) is formed in a plate shape (specifically, a non-porous plate shape) that blocks the flow of air, and is provided at the lower end of the air suction port (51a). The grill (52) has a central portion of the air suction port (51a) so that the suction opening (60) is formed between the outer periphery of the grill (52) and the opening edge of the air suction port (51a). Covering.

  In this example, the grill (52) is formed in a square plate shape smaller than the air suction port (51a) formed in a square shape in plan view, and the height of the bottom surface of the air suction port (51a) is It is provided in the lower end part of the air inlet (51a) so that it may become the same as the height of a lower end. The lower surface of the grill (52) is formed in a flat surface, and the lower surface is flush with the central portion of the lower surface of the panel body (51) with the suction opening (60) interposed therebetween.

  In the state that “the height of the lower surface of the grill (52) is the same as the height of the lower end of the air suction port (51a)”, the height of the lower surface of the grill (52) is the same as that of the air suction port (51a). ) Is completely the same as the lower end height (for example, the difference in height between the lower surface of the grill (52) and the lower end of the air inlet (51a) is zero), as well as the grill ( 52) the height of the lower surface of the air suction port (51a) is substantially the same as the height of the lower end of the air suction port (51a) (for example, the height difference between the lower surface of the grill (52) and the lower end of the air suction port (51a) Is included within about 5 mm).

<Plate member>
The plate member (53) is formed in a plate shape extending along the inner circumference of the air suction port (51a), and the inner edge of the air suction port (51a) is positioned so that the upper edge is located on the inner circumference side of the lower edge. It is provided around the circumference. The upper edge of the plate member (53) is located above the lower end of the air suction port (51a), and the lower edge surrounds the outer periphery of the grill (52) in plan view.

  In this example, the plate member (53) continuously extends over the entire inner circumference of the air suction port (51a). The plate member (53) is bent so as to be concave with respect to the outer peripheral edge of the grill (52). Specifically, the plate member (53) is formed in a cylindrical shape (frame shape) having a square cross section, and the upper edge of the plate member (53) is located on the inner peripheral side of the lower edge. It is curved in a circular arc shape that is concave with respect to the outer peripheral edge.

  Further, in this example, the lower edge of the plate member (53) is located between the inner peripheral edge and the outer peripheral edge of the suction opening (60) in plan view, and the suction opening (60) in plan view is defined by the plate member ( 53) is divided into a first suction opening (61) located on the inner peripheral side of the lower edge and a second suction opening (62) located on the outer peripheral side of the lower edge of the plate member (53). . The inner peripheral edge of the suction opening (60) corresponds to the outer peripheral edge of the grill (52), and the outer peripheral edge of the suction opening (60) corresponds to the opening edge of the air suction opening (51a).

<Hanging support part>
As shown in FIGS. 1 to 6, the four suspension support portions (54) are provided on the inner periphery of the air suction port (51a), suspend the grille (52) and support the plate member (53). . Specifically, each suspension support part (54) has a first extension part (54a) and a second extension part (54b). FIG. 5 is an enlarged partial perspective view of the suspension support portion (54) as viewed obliquely from above. FIG. 6 shows an enlarged view of the vicinity of the suspension support portion (54) in the longitudinal section of the decorative panel (50) along the extending direction of the first extension portion (54a) of the suspension support portion (54). FIG. 6 is a partial vertical cross-sectional view corresponding to a partial vertical cross-sectional view taken along line VI-VI in FIG. 4.

  In each suspension support part (54), the first extension part (54a) extends from the inner peripheral part of the air suction port (51a) toward the inner peripheral side, and the second extension part (54b) The first extending portion (54a) is formed integrally with the first extending portion (54a) and extends downward from the tip end portion. The “inner peripheral portion of the air suction port (53)” refers to a portion of the panel body (51) that constitutes the air suction port (51a) (a portion that surrounds the air suction port (51a)). That is, not only the part corresponding to the inner peripheral surface of the air suction port (51a) in the panel body (51) but also the air suction port in the panel body (51) is provided in the inner peripheral part of the air suction port (51a). A portion (for example, an inner peripheral edge portion of the upper end surface continuing to the upper end of the inner peripheral surface of the air suction port (51a)) including the inner peripheral surface of (51a) is also included. In this example, the first extension part (54a) (extension part) extends from the inner peripheral surface of the air suction port (51a) toward the inner peripheral side, and the second extension part (54b) ( The hanging portion is formed integrally with the first extending portion (54a) and hangs down from the distal end portion of the first extending portion (54a).

  In this example, the first extension part (54a) is formed in a plate shape extending from the inner peripheral part of the air suction port (51a) toward the inner peripheral side, and the second extension part (54b) is The first extending portion (54a) is formed in a plate shape extending downward from the tip end portion. Specifically, the first extension part (54a) of the suspension support part (54) is spaced from the inner peripheral surface of the air suction port (51a) in the state where the first extension part (54a) stands up and down. It is formed in a pair of plate shape extended toward. The second extension part (54b) of the suspension support part (54) is formed in a plate shape extending vertically, and both ends in the short direction thereof are the first extension part (54a) of the suspension support part (54). ).

  The grill (52) is connected to the lower ends of the second extending portions (54b) of the four suspension support portions (54) and is disposed at the lower end of the air suction port (51a). In this example, the four suspension support portions (54) are respectively disposed at the four corner portions of the grill (52). Specifically, the air suction port (51a) is formed in a rectangular shape in a plan view, and the grill (52) is formed in a rectangular shape in a plan view. And the 1st extension part (54a) of the suspension support part (54) is extended toward the corner | angular part of a grill (52) from the corner | angular part of an air suction inlet (51a) in planar view. The lower end of the second extension part (54b) of the suspension support part (54) is connected to the corner part of the grill (52). In this example, the grill (52) is rounded with its four corners chamfered. And the 2nd extension part (54b) of the suspension support part (54) is curving so that the outer edge of a corner | angular part may be met in planar view. That is, the 2nd extension part (54b) of the suspension support part (54) is formed in circular arc plate shape (plate shape whose cross section is circular arc). In this example, the second extension part (54b) of the suspension support part (54) is connected to the outer edge of the corner of the grille (52), but the second extension part of the suspension support part (54) The protruding portion (54b) may be connected to a portion inside the outer edge of the corner portion of the grill (52).

  The plate member (53) is connected to the lower part of the first extension part (54a) of the four suspension support parts (54) and is arranged on the inner periphery of the air suction port (51a). In this example, the lower part of the first extension portion (54a) of the four suspension support portions (54) is formed by four plate members (53) formed in a cylindrical shape (frame shape) having a square cross section. Connected to each corner.

  Further, the lower portion of the first extending portion (54a) of the suspension support portion (54) is formed in a shape corresponding to the outer peripheral surface of the plate member (53), and the outer peripheral surface of the plate member (53) is formed therebelow. Is connected. In this example, the first extension part (54a) of the suspension support part (54) is formed in an arc shape whose lower part is concave with respect to the outer peripheral edge of the grill (52), and a plate member ( 53) is connected with the outer peripheral surface fitted.

  In this example, a part of the panel body (51) (specifically, a part near the air suction port (51a)), a grille (52), a plate member (53), and four suspension support parts ( And 54) are integrally formed.

<filter>
As shown in FIGS. 1 to 4, the filter (55) is provided above the air suction port (51a) of the panel body (51), and supplements dust in the air that has passed through the air suction port (51a). Is configured to do. The filter (55) is formed in a square lattice frame shape in plan view, and is attached to the upper side of the central portion of the panel body (51) to cover the air suction port (51a).

  In this example, the filter (55) is formed so that the area in plan view is equal to the opening area at the upper end of the air suction port (51a). The filter (55) may be formed such that the area in plan view is larger than the opening area at the upper end of the air suction port (51a).

<Wind adjustment blade>
As shown in FIGS. 1 to 4, the four wind direction adjusting blades (56) are respectively provided at the lower ends of the four air outlets (51 b) of the panel body (51) and flow through the air outlet (51 b). It is configured to adjust the direction of air flow. The wind direction adjusting blade (56) is formed in a plate shape extending along the longitudinal direction of the air outlet (51b), and swing shafts are provided at both ends in the longitudinal direction. The wind direction adjusting blade (56) is supported by the panel body (51) so as to be swingable about the swing shaft.

[Details of essential parts of makeup panel]
Next, the main part of the decorative panel (50) will be described in detail with reference to FIG. 7 shows the longitudinal section of the decorative panel (50), and the upper part of FIG. 7 shows the main part of the decorative panel (50) viewed from above (near the air inlet (51a)). The lower part of FIG. 7 shows the main part of the decorative panel (50) viewed from below. Moreover, in the center part of FIG. 7, illustration of a suspension support part (54), a filter (55), and a wind direction adjustment blade (56) is abbreviate | omitted.

<Opening area of suction opening>
As shown in the lower part of FIG. 7, the opening area of the first suction opening (61) is larger than the opening area of the second suction opening (62). In FIG. 7, the first suction opening (61) is provided with a right-up hatching with a narrow line interval, and the second suction opening (62) is provided with a left-up hatching with a narrow line interval. Yes.

<Opening area of opening>
As shown in the upper part of FIG. 7, the opening area of the first opening (63) is wider than the opening area of the second opening (64). The first opening (63) is a region surrounded by the upper edge of the plate member (53), and the second opening (64) is air-suctioned with the upper edge of the plate member (53) in plan view. It is a region sandwiched between the inner peripheral surface of the mouth (51a). Further, in FIG. 7, the first opening (63) is provided with a right-upward hatching with a wide line interval, and the second opening (64) is provided with a left-upward hatching with a wide line interval. Yes.

<Ratio of opening area>
The ratio of the opening area of the first suction opening (61) to the second suction opening (62) is larger than the ratio of the opening area of the first opening (63) to the second opening (64). . The ratio of the opening area of the first suction opening (61) to the second suction opening (62) is equivalent to the ratio of the opening area of the first opening (63) to the second opening (64). Also good.

<The position of the lower edge of the plate member>
As shown in the center of FIG. 7, the height of the lower edge of the plate member (53) is the same as the height of the lower end of the air suction port (51a). In addition, the height of the lower edge of the plate member (53) may be higher than the height of the lower end of the air suction port (51a). Moreover, in this example, as shown in the lower part of FIG. 7, the lower edge of the plate member (53) is more than the center line (CL) between the inner peripheral edge and the outer peripheral edge of the suction opening (60) in plan view. Located on the outer periphery. Moreover, in this example, as shown in the center part of FIG. 7, the height of the lower edge of the plate member (53) is the same as the height of the lower surface of the grill (52). In addition, the height of the lower edge of the plate member (53) may be higher than the height of the lower surface of the grill (52).

  It should be noted that the state that the height of the lower edge of the plate member (53) is the same as the height of the lower end of the air inlet (51a) (or the height of the lower surface of the grill (52)) The state in which the height of the lower edge of the plate member (53) is completely the same as the height of the lower end of the air inlet (51a) (or the height of the lower surface of the grill (52)) The height of the lower edge of the plate member (53) is the height of the lower end of the air inlet (51a) (or the height of the lower surface of the grill (52)) The state (for example, the state where the height difference is about 5 mm or less) that is substantially the same is also included.

<Position of upper edge of plate member>
As shown in the upper part and the center part of FIG. 7, the upper edge of the plate member (53) overlaps with the outer peripheral edge of the grill (52) in plan view. The upper edge of the plate member (53) may be located on the inner peripheral side of the outer peripheral edge of the grill (52) in plan view.

[Appearance of indoor unit]
Next, the appearance of the indoor unit (10) viewed from below will be described. As shown in FIG. 2, the plate member (53) is disposed on the inner periphery of the air suction port (51a) so that the upper edge thereof is located on the inner periphery side of the lower edge. Therefore, as shown in FIG. 3, when the indoor unit (10) provided on the ceiling (CE) is viewed from below, the internal parts of the indoor unit (10) from the suction opening (60) (in this example, the filter ( 55)) is difficult to see.

  In this example, the upper edge of the plate member (53) overlaps with the outer peripheral edge of the grill (52) in a plan view, and the lower edge thereof is between the inner peripheral edge and the outer peripheral edge of the suction opening (60) in a plan view. It is arranged to be located. Therefore, when the indoor unit (10) is viewed from below, a region of the suction opening (60) located on the outer peripheral side of the lower edge of the plate member (53) in plan view (that is, the second suction opening (62)). ), A part of the filter (55) is visible, but the region of the suction opening (60) located on the inner peripheral side of the lower edge of the plate member (53) in plan view (that is, the first suction opening) (61)), the remaining part of the filter (55) is hidden behind the plate member (53) and cannot be seen.

[Air flow in indoor units]
Next, the flow of air in the indoor unit (10) will be described with reference to FIG. In addition, illustration of the suspension support part (54) is abbreviate | omitted in FIG.

  When the indoor fan (31) is driven, indoor air is sucked from the suction opening (60) into the air suction port (51a). In the air suction port (51a), the indoor air sucked from the suction opening (60) is divided into the inner peripheral side and the outer peripheral side of the plate member (53) at the lower edge of the plate member (53), and the plate member ( 53) and air flowing on the inner peripheral side of the plate member (53) and air flowing on the outer peripheral side of the plate member (53). That is, in the air suction port (51a), a first ventilation path through which air flows from the suction opening (60) through the inner peripheral side of the plate member (53) toward the upper end of the air suction port (51a). (R1) and a second ventilation path (R2) through which air flows from the suction opening (60) through the outer peripheral side of the plate member (53) toward the upper end of the air suction port (51a) are configured. .

  In the first ventilation path (R1), the air flowing into the inner peripheral side of the plate member (53) is guided toward the center of the air inlet (51a) along the inner peripheral surface of the plate member (53). The air flows toward the upper end of the air inlet (51a). The air that has passed through the first ventilation path (R1) passes through the central portion of the filter (55), passes through the bell mouth (34), and is sucked into the indoor fan (31).

  On the other hand, in the second ventilation path (R2), the air flowing into the outer peripheral side of the plate member (53) does not significantly change the flow direction by the plate member (53), and the outer periphery of the plate member (53). It passes between the surface and the inner peripheral surface of the air suction port (51a) and flows toward the upper end of the air suction port (51a). The air that has passed through the second ventilation path (R2) passes through the peripheral edge of the filter (55) (portion around the center), and then passes through the bell mouth (34) and is sucked into the indoor fan (31). .

  The air sucked into the indoor fan (31) is blown out radially outward from the side of the indoor fan (31). The air blown out from the indoor fan (31) exchanges heat with the refrigerant flowing through the indoor heat exchanger (32) when passing through the indoor heat exchanger (32). The air that has passed through the indoor heat exchanger (32) is divided into four air outlets (33b) and flows downward through the four air outlets (33b). The air that has passed through the four air outlets (33b) passes through the four suction communication ports (40a) and the four air outlets (51b) in order, and is blown out into the room.

[Effects of Embodiment 1]
As described above, by supporting the grill (52) using the suspension support portion (54), the grill (52) is supported more firmly than when the grill (52) is suspended by the wire. be able to. In addition, the grill (52) is connected to the air suction port (51a) so that the suction opening (60) is formed between the outer peripheral edge of the grill (52) and the opening edge of the air suction port (51a) in plan view. By covering the central part, the opening area of the suction opening (60) can be secured. As described above, the grill (52) can be firmly supported while securing the opening area of the suction opening (60), and therefore, the grill (52) is suppressed while suppressing an increase in ventilation resistance in the suction opening (60). Can be stabilized.

  In addition, by forming the first extension part (54a) of the suspension support part (54) in a plate-like state standing up and down, an increase in ventilation resistance due to the arrangement of the suspension support part (54) is achieved. Can be suppressed. Thereby, the flow of the air which passes an air suction inlet (51a) can be made smooth.

  Further, by forming the first extension part (54a) of the suspension support part (54) in a pair of plate shapes, the first extension part (54a) is formed in a single plate shape. The connection strength between the first extension part (54a) of the suspension support part (54) and the panel body (51) and the first extension part (54a) and the second extension of the suspension support part (54) The connection strength between the projecting portion (54b) can be improved. Moreover, the 2nd extension part (54b) of the suspension support part (54) is formed in rod shape by forming the 2nd extension part (54b) of the suspension support part (54) in plate shape. The connection area between the second extension part (54b) of the suspension support part (54) and the grill (52) can be made wider than the case. Thereby, the connection strength between the suspension support part (54) and the grille (52) can be improved. Thus, the connection strength between the first extension part (54a) of the suspension support part (54) and the panel body (51), and the first extension part (54a) of the suspension support part (54). Since the connection strength between the second extension portion (54b) and the connection strength between the suspension support portion (54) and the grill (52) can be improved, the support of the grill (52) can be improved. Stability can be improved.

  Further, by forming the suspension support part (54) integrally with the panel body (51) and the grill (52), the connection strength between the suspension support part (54) and the panel body (51) and suspension The connection strength between the support portion (54) and the grill (52) can be improved. Thereby, the stability of the support of the grill (52) can be improved.

  The suspension support portion (54) may be formed separately from the grill (52) while being formed integrally with the panel body (51), or may be formed integrally with the grill (52). On the other hand, it may be formed separately from the panel body (51). By forming the suspension support part (54) integrally with the panel body (51), the connection strength between the suspension support part (54) and the panel body (51) can be improved. By forming the portion (54) integrally with the grill (52), the connection strength between the suspension support portion (54) and the grill (52) can be improved. That is, the suspension support portion (54) is integrally formed with at least one of the panel body (51) and the grill (52), thereby connecting the suspension support portion (54) and the panel body (51). At least one of the strength and the connection strength between the suspension support portion (54) and the grill (52) can be improved, and the support stability of the grill (52) can be improved.

  In addition, by disposing the suspension support portion (54) at the corner of the grill (52), the grill (52) can be made more than when the suspension support portion (54) is disposed at the side of the grill (52). It can be firmly supported. Thereby, the stability of the support of the grill (52) can be improved.

  Further, the upper edge of the plate member (53) is located on the inner peripheral side with respect to the lower edge, the upper edge of the plate member (53) is located above the lower end of the air suction port (51a), and the plate member (53 ) By providing the plate member (53) so that the lower edge surrounds the outer periphery of the grill (52) in plan view, while ensuring the opening area of the suction opening (60), the indoor unit ( The internal parts of 10) (in this example, the filter (55)) can be made difficult to see. Thereby, the design property of a decorative panel (50) can be improved, suppressing the increase in ventilation resistance in a suction opening (60).

  Moreover, by forming the lower part of the 1st extension part (54a) of a suspension support part (54) in the shape corresponding to the outer peripheral surface of a plate member (53), and connecting the outer peripheral surface of a plate member (53) The connection area between the suspension support part (54) and the plate member (53) can be increased. Thereby, since the connection strength between the suspension support portion (54) and the plate member (53) can be improved, the support of the plate member (53) by the suspension support portion (54) can be strengthened. it can.

  Further, by providing the plate member (53) so that the upper edge of the plate member (53) is located on the inner peripheral side with respect to the lower edge, air flowing into the inner peripheral side of the plate member (53) Guide to the center of (51a). Thereby, the flow of the air which passes the center part (center part in planar view) of an air suction inlet (51a) can be promoted.

  In general, the suction port of the indoor fan (31) is a central portion of the indoor unit body (20) in a plan view (in this example, the central portion of the air introduction port (33a) formed in the drain pan (33)). ) In many cases. Therefore, by promoting the flow of air passing through the central portion of the air suction port (51a), it is possible to promote air suction by the indoor fan (31) in the indoor unit body (20). Thereby, the air suction efficiency in the indoor unit body (20) can be improved.

  Further, by bending the plate member (53) so as to be concave with respect to the outer peripheral edge of the grill (52), the plate member (53) is bent so as to be convex with respect to the outer peripheral edge of the grill (52). Compared to the case, the gap between the plate member (53) and the grille (52) can be secured wider. Thereby, the ventilation resistance in the inner peripheral side of a board member (53) can be reduced, and the flow of the air which passes the inner peripheral side of a board member (53) can be made smooth. Therefore, the flow of air passing through the central portion of the air suction port (51a) can be promoted.

  Further, by providing the plate member (53) so that the lower edge of the plate member (53) divides the suction opening (60) into the first suction opening (61) and the second suction opening (62) in plan view. In addition to the first ventilation path (R1) that passes through the inner peripheral side of the plate member (53), the second ventilation path that passes through the outer peripheral side of the plate member (53) inside the air inlet (51a) ( R2) can be configured. In the second ventilation path (R2), the air flowing into the outer peripheral side of the plate member (53) is not significantly changed in the flow direction by the plate member (53), and the air inlet (51a) It flows toward the top. That is, the ventilation resistance in the second ventilation path (R2) is lower than the ventilation resistance in the first ventilation path (R1). Therefore, by forming the second ventilation path (R2) in addition to the first ventilation path (R1) inside the air suction port (51a), the air sucked from the suction opening (60) is plate member (53). Ventilation resistance at the air inlet (51a) can be reduced compared to the case where only the inner peripheral side of the air is passed (that is, when only the first ventilation path (R1) is formed), and the air inlet ( The flow of air passing through 51a) can be smoothed.

  Further, by reducing the ventilation resistance at the air inlet (51a), the work required to suck air in the indoor unit body (20) (specifically, the rotational speed of the indoor fan (31)) is reduced. be able to. Thereby, the noise in the indoor unit (10) (specifically, the operating sound of the indoor fan (31)) can be reduced.

  The plate member (53) is provided with a plate member (53) so that the lower edge of the plate member (53) divides the suction opening (60) into a first suction opening (61) and a second suction opening (62) in plan view. Supply the air that has passed through the first ventilation path (R1) to the center of the filter (55) by configuring the first ventilation path (R1) and the second ventilation path (R2) inside the suction port (51a) Then, the air that has passed through the second ventilation path (R2) is supplied to the peripheral portion of the filter (55) (for example, the portion hidden by the plate member (53) when the indoor unit (10) is viewed from below). be able to. Thereby, not only the center part of the filter (55) but also the peripheral part of the filter (55) can be used effectively.

  Further, by making the opening area of the first suction opening (61) larger than the opening area of the second suction opening (62), the ventilation resistance at the inlet of the first ventilation path (R1) is reduced to the second ventilation path (R2). ) Can be lower than the draft resistance at the entrance. Thereby, since inflow of the air to the 1st ventilation path (R1) can be accelerated | stimulated, the flow of the air which passes the center part of an air suction inlet (51a) can be promoted.

  Further, by making the opening area of the first opening (63) wider than the opening area of the second opening (64), the ventilation resistance at the outlet of the first ventilation path (R1) is reduced to the second ventilation path (R2). ) Can be made lower than the draft resistance at the outlet. Thereby, since the outflow of the air from the 1st ventilation path (R1) can be accelerated | stimulated, the flow of the air which passes the center part of an air suction inlet (51a) can be accelerated | stimulated.

  Further, the ratio of the opening area of the first suction opening (61) to the second suction opening (62) is greater than or equal to the ratio of the opening area of the first opening (63) to the second opening (64). If this is not the case (that is, the ratio of the opening area of the first suction opening (61) to the second suction opening (62) is the opening area of the first opening (63) relative to the second opening (64)). The flow of the air passing through the first ventilation path (R1) can be made smoother than when the ratio is smaller than the above-mentioned ratio. Thereby, the flow of the air which passes the center part of an air suction inlet (51a) can be promoted.

  Further, the height of the lower edge of the plate member (53) is made equal to the height of the lower end of the air suction port (51a) or higher than the height of the lower end of the air suction port (51a). The plate member (53) can be made less noticeable than when the lower edge protrudes downward from the air inlet (51a). Thereby, the designability of a decorative panel (50) can be improved.

  Further, the plate member (53) is provided so that the lower edge of the plate member (53) is located on the outer peripheral side with respect to the center line (CL) between the inner peripheral edge and the outer peripheral edge of the suction opening (60) in plan view. Therefore, the lower edge of the suction opening (60) and the lower part of the plate member (53) are lower than when the lower edge of the plate member (53) is located on the inner peripheral side of the center line (CL) in plan view. The gap between the edges can be narrowed. Thereby, since the internal components of the indoor unit (10) can be hardly seen from the suction opening (60), the design of the decorative panel (50) can be improved.

  Further, by providing the plate member (53) so that the upper edge of the plate member (53) overlaps with the outer peripheral edge of the grill (52) in a plan view or is located on the inner peripheral side of the outer peripheral edge of the grill (52). When the indoor unit (10) is viewed in plan view from below, the internal parts of the indoor unit (10) in the area of the suction opening (60) located on the inner peripheral side of the lower edge of the plate member (53) Can be invisible. Thereby, the designability of a decorative panel (50) can be improved.

  In addition, the grill (52) is provided below the panel body (51) by providing the grill (52) so that the lower surface of the grill (52) has the same height as the lower end of the air inlet (51a). The sense of unity (flat impression) between the panel main body (51) and the grill (52) can be enhanced as compared with the case of protruding. Thereby, the designability of a decorative panel (50) can be improved.

[Modification of plate member]
As shown in FIG. 9, as the plate member (53) moves from the lower edge to the upper edge, the radius of curvature (CR) of the plate member (53) centering on the outer periphery of the grill (52) gradually increases. As such, the plate member (53) may be configured. In FIG. 9, the inner peripheral surface of the plate member (53) when the curvature radius of the plate member (53) is the same from the upper edge to the lower edge of the plate member (53) is indicated by a two-dot chain line. Yes.

  By configuring as described above, the distance between the plate member (53) and the grill (52) can be gradually increased from the lower edge to the upper edge of the plate member (53). Thereby, as it goes from the lower edge to the upper edge of the plate member (53), the ventilation resistance on the inner peripheral side of the plate member (53) can be gradually lowered, and the inner peripheral side of the plate member (53) is reduced. The flow of air passing therethrough (that is, the flow of air passing through the first ventilation path (R1)) can be made smooth. Therefore, the flow of air passing through the central portion of the air suction port (51a) can be promoted.

[Other variations of plate members]
As shown in FIG. 10, the plate member (53) may be formed to be bent (or bent) into an L shape that is concave with respect to the outer peripheral edge of the grill (52). Or as shown in FIG. 11, the plate member (53) may be formed so as to incline linearly upward from the outer peripheral side of the air suction port (51a) toward the inner peripheral side.

  Even when configured as described above, the air flowing into the inner peripheral side of the plate member (53) can be guided toward the center of the air suction port (51a), and the central portion of the air suction port (51a) can be guided. The flow of air passing therethrough can be promoted.

  When the plate member (53) is bent so as to be concave with respect to the outer peripheral edge of the grill (52) (FIGS. 2, 9, and 10), the plate member (53) is connected to the air suction port (51a). ), The gap between the plate member (53) and the grille (52) can be ensured wider than the case where it is linearly inclined upward from the outer peripheral side to the inner peripheral side (FIG. 11).

[Modified example of decorative panel]
As shown in FIG. 12, the grill (52) is provided at the lower end of the air inlet (51a) so that the lower surface of the grill (52) is higher than the lower end of the air inlet (51a). Also good. In this example, the lower surface of the grill (52) is formed into a flat surface, and the lower surface is parallel to the lower surface of the panel body (51).

  Also when comprised as mentioned above, a sense of unity with a panel main body (51) and a grill (52) can be improved rather than the case where a grill (52) has projected below the panel main body (51).

[Variation 1 of the suspension support section]
As shown in FIG. 13, the four suspension support portions (54) may be disposed on four sides of the grill (52) (in this example, the center of the four sides). In this example, the air suction port (51a) is formed in a rectangular shape in plan view, and the grill (52) is formed in a rectangular shape in plan view. And the 1st extension part (54a) of the suspension support part (54) is extended toward the side part of a grille (52) from the side part of an air suction inlet (51a) in planar view. The lower end of the second extension part (54b) of the suspension support part (54) is connected to the side part of the grill (52). In addition, the 2nd extension part (54b) of a suspension support part (54) may be connected to the outer edge of the side part of a grill (52), and is more than an outer edge among the side parts of a grille (52). It may be connected to the inner part. The lower part of the first extension part (54a) of the suspension support part (54) is respectively connected to the four side parts of the plate member (53) formed in a cylindrical shape (frame shape) having a square cross section. It is connected.

  In addition, the side part of the air suction port (51a) is a part along the side of the air suction port (51a) in the inner peripheral edge of the air suction port (51a) formed in a rectangular shape in plan view. It is a portion excluding the four corners of the air suction port (51a) (the portion including the corners of the air suction port (51a)) of the inner peripheral edge of the air suction port (51a). Similarly, the side portion of the grill (52) is a portion along the side of the grill (52) in the outer peripheral portion of the grill (52) formed in a rectangular shape in plan view. 52) is a portion excluding the four corners of the grill (52) (the portion including the corner of the grill (52)) of the outer peripheral edge of 52). Moreover, the side part of a plate member (53) is a part along the side of the plate member (53) formed in the rectangular frame shape in planar view, and the corner | angular part (plate member ( It is the part excluding the part including the corner of 53).

  In the decorative panel (50) shown in FIG. 13, the flow velocity of the air passing through the region sandwiched between the corner of the air inlet (51a) and the corner of the grill (52) in the suction opening (60). Tends to be faster than the flow velocity of air passing through a region sandwiched between the side of the air suction port (51a) and the side of the grill (52) in the suction opening (60). Therefore, by arranging the suspension support part (54) on the side part of the grill (52), it is possible to effectively suppress an increase in ventilation resistance due to the arrangement of the suspension support part (54). Thereby, the flow of the air which passes an air suction inlet (51a) can be made smooth.

[Modification 2 of the suspension support section]
As shown in FIG. 14, the suspension support part (54) may be formed in one plate shape. In this example, the first extension part (54a) of the suspension support part (54) is a single plate extending from the inner peripheral surface of the air suction port (51a) toward the inner peripheral side in an upright state. Is formed. The second extension portion (54b) of the suspension support portion (54) is formed in a plate shape extending vertically, and one end portion in the short direction thereof is the first extension portion (54a) of the suspension support portion (54). ) Is connected to the tip.

  As described above, the first extending portion (54a) of the suspension support portion (54) is formed in a single plate-like shape in the up-and-down state, thereby resulting in the arrangement of the suspension support portion (54). Increase in ventilation resistance can be suppressed. Thereby, the flow of the air which passes an air suction inlet (51a) can be made smooth. Moreover, the 2nd extension part (54b) of the suspension support part (54) is formed in rod shape by forming the 2nd extension part (54b) of the suspension support part (54) in plate shape. The connection area between the second extension part (54b) of the suspension support part (54) and the grill (52) can be made wider than the case. Thereby, since the connection strength between the suspension support part (54) and the grill (52) can be improved, the support stability of the grill (52) can be improved.

[Modification 3 of the suspension support section]
As shown in FIGS. 15 and 16, the suspension support portion (54) may be formed separately from the panel body (51) and the grill (52). In this example, the suspension support portion (54) is connected to the panel body (51) and the grill (52) by claw fitting.

  More specifically, in this example, the first extending portion (54a) of the suspension support portion (54) is directed from the inner peripheral surface of the air suction port (51a) toward the inner peripheral side with the plate surface facing up and down. The base end portion is formed with a concave portion that is recessed downward. The second extension part (54b) of the suspension support part (54) extends from the tip end part of the first extension part (54a) of the suspension support part (54) to the inner peripheral side with the plate surface facing up and down. It is formed in a plate shape that is inclined downward, and is bent in an L shape so that its tip end portion is parallel to the upper surface of the grill (52). Further, the panel body (51) is provided with an extending piece (51c) extending from the inner peripheral surface of the air suction port (51a) to the inner peripheral side.

  The grille (52), the plate member (53), and the suspension support part (54) are respectively provided with a first engagement claw (71), a second engagement claw (72), and a third engagement that protrude upward. A claw (73) is provided. Specifically, the first engagement claw (71) is provided at the corner of the grill (52), the second engagement claw (72) is provided at the corner of the plate member (53), and the third The engagement claw (73) is provided in a recess formed in the base end portion of the first extension portion (54a) of the suspension support portion (54). The third engaging claw (73) has a trunk portion (70a), a neck portion (70b), and a head portion (70c). The trunk portion (70a) is formed in a columnar shape protruding upward. The neck (70b) is formed in a columnar shape whose diameter is smaller than the diameter of the body (70a). The head (70c) is formed in a truncated cone shape having a diameter larger than the diameter of the neck (70b) at the base end and gradually decreasing from the base end toward the tip. Moreover, the slit along the protrusion direction is formed in the 3rd engagement nail | claw (73). Thereby, the 3rd engaging claw (73) is comprised so that the diameter can be reduced by elastic deformation. The first engagement claw (71) and the second engagement claw (72) have the same configuration as the third engagement claw (73).

  The suspension support portion (54) is provided with first and second engagement holes (76, 77) penetrating vertically corresponding to the first and second engagement claws (71, 72), The extending piece (51c) is provided with a third engaging hole (78) penetrating vertically corresponding to the third engaging claw (73). Specifically, the first engagement hole (76) is provided at the tip of the second extension part (54b) of the suspension support part (54), and the second engagement hole (77) is suspended. It is provided in the intermediate part of the 1st extension part (54a) of a support part (54).

  Then, by inserting the first engagement claw (71) and the second engagement claw (72) into the first engagement hole (76) and the second engagement hole (77) and locking them, the suspension support portion The grill (52) and the plate member (53) are attached to (54), and the third engagement claw (73) is inserted into the third engagement hole (78) and locked, so that the panel body (51) A suspension support (54) is attached.

  As described above, by forming the suspension support portion (54) separately from the panel body (51) and the grill (52), the panel body (51), the grill (52), and the suspension support portion (54). Can be manufactured individually. Thereby, manufacture of a decorative panel (50) can be made easy.

  Further, the suspension support portion (54), the panel body (51), and the grill (52) are connected by connecting the suspension support portion (54) to the panel body (51) and the grill (52) by claw fitting. Can be connected easily. Thereby, the assembly of the decorative panel (50) can be facilitated.

  The suspension support part (54) is connected to the panel body (51) by claw fitting, while being connected to the grill (52) by other means (for example, screwing or integral formation). Alternatively, it may be connected to the grill (52) by claw fitting while being connected to the panel body (51) by other means. By connecting the suspension support part (54) to the panel body (51) by claw fitting, the suspension support part (54) and the panel body (51) can be easily connected, and the suspension support part By connecting (54) to the grill (52) by claw fitting, the suspension support portion (54) and the grill (52) can be easily connected. That is, the suspension support portion (54) is connected to at least one of the panel body (51) and the grill (52) by claw fitting, thereby connecting the suspension support portion (54) and the panel body (51). In addition, at least one of the connection between the suspension support portion (54) and the grill (52) can be facilitated, and the assembly of the decorative panel (50) can be facilitated.

  When the suspension support part (54) is formed separately from the panel body (51) and the grill (52), the color of the suspension support part (54) is the panel body (51) and the grill (52 ) Is darker than the color of the color (for example, black). By comprising in this way, a suspension support part (54) can be made not conspicuous and the good-looking of a decorative panel (50) can be improved.

[Modification 4 of the suspension support section]
As shown in FIGS. 17 and 18, the suspension support portion (54) may be connected to the panel body (51) and the grill (52) by screwing. In this example, instead of the first to third engagement claws (71 to 73) and the first to third engagement holes (76 to 78) shown in FIG. 15 and FIG. 1st-3rd projection part (81-83) and the 1st-3rd insertion hole (86-88) penetrated up and down corresponding to the 1st-3rd projection part (81-83) are provided. Yes. Other configurations are the same as those shown in FIGS. 15 and 16.

  The first protrusion (81) is provided at the corner of the grill (52), the second protrusion (82) is provided at the corner of the plate member (53), and the third protrusion (83) is It is provided in a recess formed in the base end portion of the first extension portion (54a) of the suspension support portion (54). The first to third protrusions (81 to 83) are formed with first to third screw holes (81a to 83a) that open upward. The first insertion hole (86) is provided at the distal end portion of the second extension part (54b) of the suspension support part (54), and the second insertion hole (87) is the first part of the suspension support part (54). The third insertion hole (88) is provided in the extension piece part (51c), and is provided in an intermediate part of the one extension part (54a).

  Then, the first insertion hole (86) and the first screw hole (81a) are communicated, and the first screw (91) is inserted into the first insertion hole (86) and fastened to the first screw hole (81a). Thus, the grill (52) is attached to the suspension support part (54), the second insertion hole (87) and the second screw hole (82a) are communicated, and the second screw (92) is connected to the second insertion hole. The plate member (53) is attached to the suspension support portion (54) by being inserted into (87) and fastened to the second screw hole (82a), and the third insertion hole (88) and the third screw hole ( 83a), the third screw (93) is inserted into the third insertion hole (88) and fastened to the third screw hole (83a), so that the suspension support (54 ) Is attached.

  As described above, the suspension support portion (54), the panel body (51), and the grille (52) are connected by screwing the suspension support portion (54) to the panel body (51) and the grille (52). Can be easily attached and detached. Thereby, assembly and disassembly of the decorative panel (50) can be facilitated.

  The suspension support portion (54) may be connected to the panel body (51) by screwing while being connected to the grill (52) by other means (for example, claw fitting or integral formation). Alternatively, it may be connected to the grill (52) by screwing while being connected to the panel body (51) by other means. By connecting the suspension support part (54) to the panel body (51) by screwing, the suspension support part (54) and the panel body (51) can be easily attached and detached. The suspension support part (54) and the grille (52) can be easily attached and detached by connecting 54) to the grille (52) by screwing. That is, by attaching the suspension support portion (54) to at least one of the panel body (51) and the grill (52) by screwing, the suspension support portion (54) and the panel body (51) can be attached and detached. At least one of attachment / detachment of the suspension support portion (54) and the grill (52) can be facilitated, and assembly and disassembly of the decorative panel (50) can be facilitated.

(Embodiment 2)
FIG. 19 shows a configuration example of the indoor unit (10) of the air conditioner according to the second embodiment. The indoor unit (10) of the second embodiment is different from the indoor unit (10) of the first embodiment in the structure of the decorative panel (50). The other structure of the indoor unit (10) of Embodiment 2 is the same as that of the indoor unit (10) of Embodiment 1. FIG. 19 is a longitudinal sectional view showing a longitudinal section of the indoor unit (10) according to Embodiment 2, and corresponds to the longitudinal sectional view taken along the line II-II in FIG.

[Decorative panel]
As shown in FIGS. 21 and 22, the decorative panel (50) of the second embodiment includes the structure of the air inlet (51a) of the panel body (51), the structure of the grill (52), and the suspension support portion (54). This structure is different from the decorative panel (50) of the first embodiment. The other structure of the decorative panel (50) of Embodiment 2 is the same as that of the decorative panel (50) of Embodiment 1. FIG. 20 is an enlarged partial perspective view of the suspension support portion (54) as viewed obliquely from above. FIG. 21 is an enlarged view of the vicinity of the suspension support portion (54) in the longitudinal section of the decorative panel (50) along the extending direction of the first extension portion (54a) of the suspension support portion (54). FIG. 6 is a partial vertical cross-sectional view corresponding to a partial vertical cross-sectional view taken along line VI-VI in FIG. 4.

<Panel body>
The air suction port (51a) of the panel body (51) is configured such that its opening area gradually increases as it goes from the upper end to the lower end. The air suction port (51a) is bent so that its inner peripheral surface is concave with respect to the outer peripheral edge of the grill (52).

  In addition, a fixed base (101) is provided at a corner portion (corner portion in plan view) at the upper end of the inner peripheral surface of the air suction port (51a). The fixed base portion (101) is formed in a triangular plate shape, and projects from the upper end corner of the inner peripheral surface of the air suction port (51a) to the outer peripheral side. That is, the fixed base portion (101) is a portion that is continuous with the inner peripheral surface of the air suction port (51a). Further, the fixed base (101) is provided with a recess (101a). The recessed portion (101a) is recessed downward so that the base end portion of the first extending portion (54a) can be accommodated.

  In this example, the height of the lower surface of the grill (52) is the same as the height of the lower end of the inner peripheral surface of the air suction port (51a), and the height of the lower edge of the plate member (53) is The height of the lower end of the inner peripheral surface of the air suction port (51a) is higher. Further, the upper end of the inner peripheral surface of the air suction port (51a) is located on the outer peripheral side of the lower edge of the plate member (53) in plan view.

<grill>
A protrusion (102) and a locking rod (103) are provided at the corner of the grill (52). The protrusion (102) protrudes upward from the grill (52). The locking rod (103) is located on the inner peripheral side with respect to the protrusion (102). The locking rod (103) protrudes upward from the grill (52), and its tip is L-shaped toward the inner peripheral side so that it can be hooked into a locking hole (104) described later. Is bent.

<Hanging support part>
The suspension support part (54) is formed integrally with the plate member (53). The suspension support portion (54) is connected to the panel body (51) by screwing, and is connected to the grill (52) by hooking and screwing.

《First extension part》
The first extending portion (54a) extends from the inner peripheral portion of the air suction port (51a) (in this example, the fixed base portion (101a) of the air suction port (101)) to the inner peripheral side. In this example, the first extending portion (54a) is formed in a plate shape extending from the concave portion (101a) of the fixed base portion (101) toward the inner peripheral side with the plate surface facing up and down. Specifically, as shown by a two-dot chain line in FIG. 20, the first extending portion (54a) is directed from the recessed portion (101a) of the fixed base portion (101) toward the lower edge of the plate member (53). After extending obliquely downward, it extends from the lower edge of the plate member (53) to the inner peripheral side along the outer peripheral surface of the plate member (53). In this example, the base end portion of the first extension portion (54a) is formed in a triangular shape in plan view, and the recess portion (101a) of the fixed base portion (101) is the first extension portion (54a). It is formed in a shape (specifically, a triangular shape) corresponding to the shape of the base end portion.

  The first extension portion (54a) is attached to the fixing base portion (101) by the first fixing screw (111) in a state where the base end portion is accommodated in the concave portion (101a) of the fixing base portion (101). Fixed and connected. The first fixing screw (111) passes through the base end portion of the first extending portion (54a) housed in the concave portion (101a) of the fixing base portion (101), and the concave portion (101a of the fixing base portion (101). ) Is fastened to the bottom.

《Second extension part》
The second extension part (54b) extends downward from the tip of the first extension part (54a). In this example, the second extending portion (54b) is formed in a plate shape extending obliquely downward from the tip end portion of the first extending portion (54a) toward the inner peripheral side with the plate surface facing up and down. The front end portion (lower end portion) is bent in an L shape so as to be parallel to the upper surface of the grill (52).

  Further, a locking hole (104) is provided at the tip of the second extending portion (54b). The locking hole (104) is disposed at a position corresponding to the locking rod (103) of the grill (52), and the second extension extends so that the locking rod (103) of the grill (52) can be hooked. The tip part of the part (54b) penetrates up and down.

  The second extending portion (54b) has a distal end portion of the second extending portion (54b) with a second fixing screw (104) in a state where the engaging hook (103) of the grille (52) is hooked in the engaging hole (104) of the distal end portion. 112) and fixedly connected to the protrusion (102) of the grill (52). The second fixing screw (112) passes through the tip of the second extension (54b) placed on the protrusion (102) of the grill (52) and is fastened to the protrusion (102).

[Effects of Embodiment 2]
Also when comprised as mentioned above, the effect similar to Embodiment 1 can be acquired. Specifically, by supporting the grille (52) using the suspension support part (54), it is possible to stabilize the support of the grille (52) while suppressing an increase in ventilation resistance at the suction opening (60). Can do.

  In addition, by configuring the air suction port (51a) so that the opening area of the air suction port (51a) gradually increases from the upper end toward the lower end, the interior of the indoor unit (10) from the suction opening (60) The opening area of the suction opening (60) can be increased while making it difficult to see the component (in this example, the filter (55)). Thereby, the ventilation resistance in a suction opening (60) can be reduced, ensuring the designability of a decorative panel (50).

  Further, the second extension portion (54b) is formed by forming the second extension portion (54b) so as to extend obliquely downward from the tip end portion of the first extension portion (54a) toward the inner peripheral side. Is less visible from the suction opening (60) than the second extension part (54b) of the suspension support part (54b) than when the first extension part (54a) extends vertically downward. can do. Thereby, the designability of a decorative panel (50) can be improved.

  Also, the grill (52) and the suspension support portion (54) can be connected to each other by providing the engagement rod (103) on the grill (52) and the engagement hole (104) in the suspension support portion (54). The grill (52) and the suspension support portion (54) can be screwed in the stopped state (that is, the temporarily fixed state). Thereby, screwing of a grill (52) and a suspension support part (54) can be made easy.

  The suspended support part (54) may be connected to the panel body (51) by means different from screwing (for example, claw fitting or integral formation). Similarly, the suspension support part (54) may be connected to the grille (52) by means different from tacking or screwing.

  The air suction port (51a) may be configured such that the upper end of the inner peripheral surface thereof overlaps with the lower edge of the plate member (53) in plan view, and the upper end of the inner peripheral surface in plan view. You may be comprised so that it may be located in an inner peripheral side rather than the lower edge of a plate member (53). With this configuration, when the indoor unit (10) provided on the ceiling (CE) is viewed from below, the upper end of the inner peripheral surface of the air suction port (51a) and the lower edge of the plate member (53) The internal parts (in this example, the filter (55)) of the indoor unit (10) can be made difficult to see from between the two. Thereby, the designability of a decorative panel (50) can be improved.

(Other embodiments)
The opening width of the second suction opening (62) (that is, the distance between the lower edge of the plate member (53) and the opening edge of the air suction opening (51a)) is such that air passes through the second suction opening (62). It is preferable that the setting is made so that wind noise does not occur. Specifically, the opening width of the second suction opening (62) is the opening width of the suction opening (60) (that is, the distance between the outer peripheral edge of the grill (52) and the opening edge of the air suction opening (51a)). It is preferable to set it to 1/4 or more.

  In addition, a soundproof member (not shown) may be provided on the upper surface of the grill (52). By comprising in this way, the leakage of the sound from the inside of an indoor unit (10) to the downward direction can be suppressed, and the noise in an indoor unit (10) can be reduced. The soundproof member may be made of a sound insulating material or a sound absorbing material.

  Further, the upper surface of the grill (52) may be formed in a conical shape that gradually increases from the outer peripheral edge of the grill (52) toward the center (for example, a quadrangular pyramid having a square bottom surface). With this configuration, the air guided toward the center of the air suction port (51a) by the plate member (53) can be guided toward the upper end of the air suction port (51a). Thereby, the flow of the air which passes the center part of an air suction inlet (51a) can be promoted.

  In the above description, the height of the lower surface of the grill (52) is the same as the height of the lower end of the air inlet (51a) or higher than the height of the lower end of the air inlet (51a). As described above, the height of the lower surface of the grill (52) may be lower than the height of the lower end of the air suction port (51a). Even in such a configuration, by providing the plate member (53), the internal parts of the indoor unit (10) (for example, the filter (55) are secured from the suction opening (60) while securing the opening area of the suction opening (60). )) Can be made difficult to see.

  Moreover, in the above description, the case where the lower edge of the plate member (53) divides the suction opening (60) into the first suction opening (61) and the second suction opening (62) in a plan view is taken as an example. Although it mentioned, even if the board member (53) is provided so that the lower edge may not partition the suction opening (60) into the 1st suction opening (61) and the 2nd suction opening (62) in plane view Good. Specifically, the lower edge of the plate member (53) may be connected to the inner peripheral surface of the air suction port (51a). In this case, since the lower edge of the plate member (53) overlaps with the outer peripheral edge of the suction opening (60) (that is, the opening edge of the air suction port (51a)) in plan view, the suction opening (60) is not partitioned. Also when comprised in this way, it is possible to make it difficult to see the internal components of the indoor unit (10) from the suction opening (60) while ensuring the opening area of the suction opening (60).

  Further, the plate member (53) may be constituted by a plurality of constituent plates arranged along the inner periphery of the air suction port (51a). For example, the plate member (53) shown in FIG. 4 may be constituted by four component plates extending along the four inner walls of the air suction port (51a). Further, the plurality of component plates may be arranged along the inner periphery of the air suction port (51a) with a gap between them. For example, four component plates extending along the four inner walls of the air suction port (51a) so that gaps are formed at positions corresponding to the four corners of the plate member (53) shown in FIG. The plate member (53) may be configured by arranging. Thus, the plate member (53) may be configured to extend intermittently along the inner periphery of the air suction port (51a). Also when comprised in this way, it can make it difficult to see the internal component of an indoor unit (10) from suction opening (60), ensuring the opening area of suction opening (60).

  Moreover, although the case where the plate member (53) is continuously extended over the entire inner circumference of the air suction port (51a) was taken as an example, the plate member (53) has the air suction port (51a). It may be partially provided on a part of the inner periphery of the. Also when comprised in this way, it can make it difficult to see the internal component of an indoor unit (10) from suction opening (60), ensuring the opening area of suction opening (60).

  Moreover, although the case where the chamber (40) was provided between the indoor unit main body (20) and the decorative panel (50) was given as an example, the indoor unit (10) does not include the chamber (40). May be. In this case, in the decorative panel (50), the air inlet (51a) and the air outlet (51b) of the decorative panel (50) are respectively connected to the air inlet (33a) and the air outlet (33b) of the drain pan (33). It is provided below the indoor unit body (20) (specifically, below the drain pan (33)) so as to communicate.

  Moreover, you may implement combining the above embodiment suitably. The above embodiments are essentially preferable examples, and are not intended to limit the scope of the present invention, its application, or its use.

  As described above, the indoor unit described above is useful as an indoor unit of an air conditioner provided on a ceiling.

DESCRIPTION OF SYMBOLS 10 Indoor unit 20 Indoor unit main body 21 Casing 31 Indoor fan 32 Indoor heat exchanger 33 Drain pan 34 Bell mouth 40 Chamber 50 Cosmetic panel 51 Panel main body 51a Air inlet 51b Air outlet 52 Grill 53 Plate member 54 Suspension support part 54a 1 extension part 54b 2nd extension part 55 filter 56 airflow direction adjustment blade 60 suction opening 61 first suction opening 62 second suction opening 63 first opening part 64 second opening part CE ceiling

Claims (1)

An air conditioner indoor unit installed on the ceiling (CE),
An indoor unit main body (20) which has an indoor fan (31) and an indoor heat exchanger (32) inside, is provided on the ceiling (CE), and blows out the air sucked from below by adjusting the temperature;
A decorative panel (50) provided at the bottom of the indoor unit body (20),
The decorative panel (50)
A panel body (51) in which an air suction port (51a) penetrating up and down is formed at the center, and an air outlet (51b) penetrating up and down is formed around the air suction port (51a);
A first extension portion (54a) extending from the inner peripheral portion of the air suction port (51a) to the inner peripheral side, and the first extension portion formed integrally with the first extension portion (54a). A suspension support portion (54) having a second extension portion (54b) extending downward from the tip end portion of (54a);
It is connected to the lower end of the second extension part (54b) of the suspension support part (54) and is arranged at the lower end part of the air suction port (51a), and its outer peripheral edge and the air suction port (51a) in plan view air inlet to the suction opening (60) is formed between the opening edge of) the (plate-shaped grille covering the central portion of 51a) (52),
A plate member (53) disposed on the inner periphery of the air suction port (51a),
The plate member (53) is formed in a plate shape extending along the inner periphery of the air suction port (51a), and the air suction port (51a) is positioned such that its upper edge is located on the inner periphery side of the lower edge. ) Is arranged on the inner periphery, the upper edge is located above the lower end of the air inlet (51a), and the lower edge surrounds the outer periphery of the grill (52) in plan view,
The lower part of the first extension part (54a) of the suspension support part (54) is formed in a shape corresponding to the outer peripheral surface of the plate member (53), and the outer periphery of the plate member (53) is provided below the first extension part (54a). An indoor unit of an air conditioner characterized in that the surfaces are connected .

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