JP3111882B2 - Ceiling-mounted air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceiling-mounted air conditioner, and more particularly to an improvement in the shape of a suction grill provided at a suction port.

[0002]

2. Description of the Related Art Conventionally, for example, Japanese Patent Laid-Open No. 7-33269
There is known an air conditioner of a ceiling embedded type as disclosed in Japanese Patent Application Publication No. 9-209. This type of air conditioner is shown in FIG.
As shown in the figure, the turbo fan (b) and the heat exchanger (c) are placed in the casing (a) installed inside the opening formed in the ceiling surface.
A decorative panel (d) is attached to a lower portion of the casing (a) to form a suction port (e) and an air outlet (f). In other words, as the turbo fan (b) is driven,
After the temperature of the room air taken in from (e) is adjusted by the heat exchanger (c), the air is blown out from each outlet (f, f) toward the room. An air filter (g) for removing dust from indoor air sucked into the casing (a) is provided at the suction port (e).
A suction grill (h) is attached to the lower side. The suction grill (h) has an opening corresponding to the suction port (e) in the center thereof, and a plurality of bars are formed over the entire opening.
(i, i, ...) are provided. That is, the casing (a)
The indoor air sucked into the inside passes through the space between these bars (i, i,...) And is sucked into the casing (a) from the entire suction grill (h).

[0003]

By the way, in the conventional air conditioner as described above, the room air is supplied to the suction grill (h).
Therefore, dirt adheres to the entire bar (i, i,...) Provided on the suction grill (h). In addition, when the apparatus is installed in a room (for example, a restaurant) where the indoor air is easily contaminated, it is necessary to frequently wipe off dirt attached to the entire crosspiece (i, i,...). Then, in this wiping operation, one dirt on each crosspiece (i, i,…) is removed.
In the configuration in which the bars (i, i, ...) are provided on the entire grill (h) as described above, the bars (i, i, ...)
, The wiping operation was complicated.

In order to solve such a problem, a crosspiece (i,
i,…) can be reduced, that is, the spacing between the bars (i, i) can be increased to reduce the number of wiping lines. However, in this case, the entire suction port (e) must be Internal devices such as the air filter (g) can be seen from inside the room, making the overall appearance of the air conditioner worse.
There is a high possibility that dust or the like adhering to (g) falls into the room from the suction port (e) when the device is stopped. That is, since the crosspieces (i, i,...) Have a function of preventing internal equipment from being seen from the room and a function of preventing dust and the like from falling into the room, in addition to the function of rectifying the intake air, the conventional structure In this case, simply reducing the number of crossbars makes it impossible to obtain these functions.

Another solution is a suction grill.
(h) The area of the opening is reduced, and
By providing (i, i,...), it is conceivable to reduce the number of bars (i, i,...). That is, most of the suction grille is closed, and only a part of the suction grille has a suction opening.
However, in this case, the flow velocity at the opening of the suction grill (h) increases, and an air filter is provided immediately downstream of the opening at the air flow. , The pressure loss of the air conditioning becomes large, and the air conditioning capacity is reduced.

The present invention has been made in view of the above points, and has as its object to simplify the operation of wiping a suction grill while avoiding a decrease in air conditioning performance due to an increase in pressure loss of suction air. I do.

[0007]

In order to achieve the above object, the present invention closes a central portion of a suction grill, forms a suction opening only in an outer portion thereof, and flattens a lower surface of the closed portion. In addition to making it easier to wipe off dirt, by positioning this closed portion downward, a rectifying space is formed between the suction grille and the device main body, and pressure loss of air sucked from the suction opening is suppressed. .

Specifically, the invention according to claim 1 is a blower
(3) is installed inside and installed on the ceiling (R)
A suction port (9a) is formed at the center of the lower surface of (2, 9), and a blowout port (9b) is formed outside the suction port (9a), and a suction grille (5) is formed below the suction port (9a). 12) is arranged, and the temperature of the indoor air sucked into the inside of the device body (2, 9) from the suction port (9a) through the suction grille (12) as the blower (3) is driven and the air outlet is adjusted.
It is assumed that the ceiling-mounted air conditioner blows out from (9b) into the room. The suction grille (12) has a closed surface portion (14) formed at the center thereof and located at a lower side at a predetermined distance from the suction port (9a), and the lower surface of the indoor side is flat.
And an inclined surface portion inclined upward and outward from the outer edge of the closing surface portion (14) toward the opening edge of the suction port (9a).
(16), and a suction opening (17) for introducing indoor air is formed in the inclined surface (16).

With such a configuration, a closed surface portion (14) is provided between the suction port (9a) of the apparatus body (2, 9) and the suction opening (17) of the suction grill (12). ), A space is formed by being located on the lower side at a predetermined interval. When the air conditioner is driven, the air sucked from the suction opening (17) formed in the inclined surface (16) of the suction grill (12) with the driving of the blower (3) is once introduced into this space. After that, it is sucked into the device body (2, 9) from the suction port (9a),
The temperature is adjusted and the air is blown into the room from the air outlet (9b). For this reason, even if a part of the suction grill (12) is closed and the area of the suction opening (17) is reduced and the flow velocity in the suction opening (17) is increased, the rectifying action in the space as described above causes The pressure loss of the suction air is reduced as compared with the case where a suction opening of the apparatus body is provided immediately downstream of the suction grill (12) (especially, an air filter is often provided in the suction opening). Will be. Also, the closed surface of the central part of the suction grill (12)
In (14), since the lower surface on the indoor side is flat, even if dirt adheres to this portion, the wiping operation is easy. That is, according to the present invention, it is possible to secure a portion on the suction grille (12) that is easy to wipe off dirt without increasing the pressure loss of the suction air. Also, the suction grill (1
In 2), the portion on which dirt is particularly likely to adhere is the periphery of the suction opening (17), and the suction opening (17) has a sloped surface (14) that is inclined upward from the outer edge of the closing surface (14) outward. 16), the dirt is less noticeable than a dirt that adheres to the entire surface of the suction grill as in the conventional case.

According to a second aspect of the present invention, in the ceiling type air conditioner according to the first aspect, the lower surface of the device main body (2, 9) is rectangular, and the air outlet (9b) is connected to the room air. Are formed at four locations corresponding to the respective sides of the lower surface of the apparatus main body (2, 9) so that the direction of air blow is four directions. In addition, suction grill (12)
The closing surface (14) is also rectangular, and the inclined surfaces (16) are arranged at four locations from each side of the closing surface (14) to the opening edge of the suction port (9a). And the suction opening (17,17,…)
Corresponding to each outlet (9b, 9b,…), each inclined surface (16, 16,
…)).

With this configuration, for the four-way suction and four-way discharge air conditioner, it is possible to secure a portion on the suction grille (12) that is easy to wipe off dirt without increasing the pressure loss of the suction air. You can do it.

According to a third aspect of the present invention, in the ceiling-mounted air conditioner according to the first aspect, the crosspieces (25, 25) extending to the suction opening (17) over both right and left edges of the suction opening (17) are provided. ), And the crosspieces (25, 25) are configured to guide air in a direction perpendicular to the direction of inclination of the inclined surface portion (16).

With this configuration, the air sucked into the apparatus main body (2, 9) passing between the crosspieces (25, 25) flows into the inclined surface (1).
Since it is guided in a direction perpendicular to the inclination direction of 6),
The effect according to the first aspect of the present invention can be obtained while avoiding a rapid change in the streamline of the air from the suction opening (17) to the suction port (9a). In other words, the air introduced obliquely upward from the suction opening (17) changes its direction of flow upward toward the suction opening (9a) and is introduced into the apparatus body (2, 9). The loss does not increase.

According to a fourth aspect of the present invention, in the ceiling-mounted air conditioner according to the first aspect, the blower is a turbo fan (3).

With this configuration, in particular, a turbo fan
When (3) is applied to a ceiling-mounted air conditioner, the suction part of the fan (3) comes close to the suction port (9a) of the device body (2, 9), and in this state, the suction grill ( 12) suction opening (1
If the opening area of (7) becomes small, there is a concern that the pressure loss of the suction air becomes extremely large.However, in the present invention, the closing surface (14) is located below the suction port (9a) at a predetermined distance from the suction port (9a). Due to the rectifying action in the space formed by this, there is almost no increase in this pressure loss.

According to a fifth aspect of the present invention, in the ceiling-mounted air conditioner according to the first aspect, an air filter (9c) is provided at a suction port (9a) of the main body (2, 9). A predetermined distance is provided between the air filter (9c) and the closing surface (14) of the suction grill (12) and between the air filter (9c) and the suction part of the blower (3).

With this configuration, generally, the suction grill (12)
When the space between the air filter (9c) and the space between the air filter (9c) and the suction portion of the blower (3) is small, the pressure loss of the suction air increases, but in the present invention, the suction grill (1
By improving the shape of 2), it is possible to relatively easily secure a large space between the respective spaces. For example, an air filter is formed by utilizing a space formed between the suction grill (12) and the suction port (9a).
In the case where (9c) is arranged below the conventional one, each of the above-mentioned intervals can be ensured to be large, and the air conditioning performance is improved.

[0018]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of a ceiling-mounted air conditioner (1) according to the present embodiment. This air conditioner (1)
Is inserted into an opening (H) formed in the ceiling (R), and a sheet metal casing (2) that opens downward is installed in the space above the ceiling (S). This casing (2) is a top plate
(2a) and a side plate (2b) extending downward from the outer edge of the top plate (2a), and each device is accommodated therein. Hereinafter, each device will be described.

A turbo fan (3) is provided in the center of the casing (2). In this turbofan (3), a blade (3c) is held between a shroud (3a) and a hub (3b), and the center of the hub (3b) is
It is directly connected to the lower end of the drive shaft of the motor (4) arranged at the center. Then, by the rotation of the blade (3c) accompanying the driving of the motor (4), the air sucked from below is blown radially outward. A bell mouth (5) for guiding room air to the turbo fan (3) is provided below the turbo fan (3).

A heat exchanger (6) is provided around the outside of the turbo fan (3). This heat exchanger (6) is connected to an outdoor unit (not shown) via a refrigerant pipe, and functions as an evaporator during cooling operation and as a condenser during heating operation, and is derived from a turbo fan (3). Adjust the temperature of the air.

The heat exchanger (6) is provided below the heat exchanger (6).
Drain pan for collecting drain water generated in (6)
(8) is provided.

At the lower end of the casing (2), a decorative panel (9) having a rectangular shape in a plan view is attached. The decorative panel (9) has a rectangular air opening (9a) in the center and air outlets (9b), (9b),... At a plurality of (for example, four) side edge portions. Are formed respectively. That is, the air outlets (9b), (9b),... Are formed corresponding to the respective sides of the decorative panel (9). Also, decorative panel (9)
The air suction port (9a) is provided with an air filter (9c) for removing dust in the air sucked from the air suction port (9a). The decorative panel (9) and the casing (2) constitute an apparatus main body.

In this manner, an air passage (10) is formed between the air inlet (9a) and the air outlet (9b) of the decorative panel (9), and the air passage (10) is formed in the air passage (10). , From upstream to downstream, air filter (9c), bell mouth (5), turbo fan
(3) The heat exchanger (6) is arranged in order.

Next, a configuration which is a feature of the present embodiment will be described. The feature of this form is the air inlet of the decorative panel (9)
(9a) has the shape of a suction grille (12) detachably attached to it. Hereinafter, the shape of the suction grill (12) will be described in detail.

As shown in FIGS. 2 to 4 (FIG. 2 is a diagram showing the front surface of the suction grille (12), FIG. 3 is a diagram showing the back surface thereof, and FIG. 4 is an enlarged view of the rear corner portion). Suction gully (12)
The shape of the air inlet (9) of the decorative panel (9)
It has a rectangular shape that substantially matches the shape of a). The basic structure of the suction grille (12) includes a decorative panel (9)
The grill frame portion (13), which is formed in a frame shape substantially in conformity with the opening edge shape of the air suction port (9a), and the grill frame portion (13) has a predetermined interval. A closing surface portion (14) formed in a rectangular shape smaller than the frame portion (13), and the closing surface portion (14)
Connecting part (15) connecting the four corners of the grille with the four corners of the grille frame part (13)
And The suction glue (12) is made of oil-resistant ABS resin.

FIGS. 1 and 5 (FIG. 5 (a) is a view taken in the direction of arrow A in FIG. 2 and FIG.
As shown in FIG. 2 (b) as viewed in the direction of arrow B in FIG. 2, the closing surface (14) is located below the grille frame (13) and is attached to the decorative panel (9) as shown in FIG. In the state in which it is set, it is arranged so as to protrude toward the indoor side. For this reason, the grill frame
(13) The portion surrounded by the closing surface portion (14) and the connecting portion (15) is inclined upward and outward so that each side of the closing surface portion (14) faces the grill frame (13). Face (16,16,…)
, And substantially the entire inclined surface portion (16, 16, ...) is formed as a suction opening (17, 17, ...) for introducing indoor air. Also, the angle of inclination of the inclined surfaces (16, 16,...) Is set to about 20 ° with respect to the horizontal plane. The angle of inclination is not limited to this, but is set according to the size of the apparatus. Specifically, the larger the device, the smaller the inclination angle is set.

Hereinafter, the configuration of each unit will be described. 6 and 7 (FIG. 6 (a) is a sectional view taken along line CC in FIG. 4, FIG. 6 (b) is a sectional view taken along line DD in FIG. 3, and FIG. 6 (c) is a sectional view of FIG. 6 (d) is a sectional view taken along the line FF in FIG. 3, and FIG. 7 is a sectional view taken along the line GG in FIG. 3). The inner and outer vertical wall portions (13a, 13b) facing each other and a bottom portion (13c) connecting the lower ends of the vertical wall portions (13a, 13b) are integrally formed.
In addition, the lower end of the outer vertical wall (13b) is located above the lower end of the inner vertical wall (13a), and the bottom (13c) is positioned vertically from the lower end of the inner vertical wall (13a). It is inclined upward toward the lower end position of the wall (13b). Note that the inclination angle matches the inclination angle of the inclined surface portion (16), and the inclined surface portion (16) and the bottom portion (13c) are smoothly connected.

The inner vertical wall portion (13a) and the outer vertical wall portion (13
The reinforcing pieces (18, 18,...) are erected at a plurality of places at predetermined intervals in the extension direction of the grille frame portion (13) over the inner surface of b) and the upper surface (back surface) of the bottom portion (13c). I have. The reinforcing pieces (18, 18, ...) are connected to each other by reinforcing ribs (19, 19, ...) extending in the direction in which the grille frame (13) extends. Thereby, high rigidity of the entire grill frame (13) is ensured. Bosses (20, 20,...) Having small-diameter bottomed holes are integrally formed with reinforcing ribs (19, 19,...) At the center of each side of the grill frame (13) and in the vicinity of the four corners. It protrudes from the back surface of the bottom (13c) (see FIGS. 3 and 6 (b), (c) and (d)). The boss (20) is provided to further increase the rigidity of the grille frame portion (13) by arranging a reinforcing material (not shown) for an arbitrary pair. By inserting a reinforcing material consisting of a metal bar material into the holes of each boss (20, 20), the bar material is bridged between the bosses (20, 20), whereby the grill frame (13) The rigidity can be improved.

The suction grille (12) is provided at three places on the outer surface of the outer vertical wall (13b) on the right side in FIGS. 2 and 3 of the sides of the grille frame (13). Locking hooks (21, 21,...) For locking to locking portions (not shown) formed on the opening edge of the air suction port (9a) of the decorative panel (9) are protruded (FIG. 6 ( d)). On the other hand, of each side of the grille frame portion (13), the bottom portion (13
c), the horizontally extending surface (13) as shown in FIG.
d, 13d), openings (13e, 13e) are formed in the horizontal plane (13d, 13d) in the thickness direction (vertical direction), and an operation (not shown) is formed in the opening (13e). The knob is inserted and locked. The operation knob can be engaged and disengaged with a detachable portion (not shown) formed at the opening edge of the air suction port (9a) of the decorative panel (9). It is possible. In addition, as shown in FIG. 4, three reinforcing ribs (19, 19,...) Are arranged in parallel in the vicinity of the position where the opening (13e) is formed. (13) compensates for the decrease in rigidity. Due to such a configuration, when attaching the suction grille (12) to the air suction port (9a) of the decorative panel (9), first, the locking hook (21) of the suction grille (12) is air-tight. The suction grille (12) is suspended in the hanging portion of the opening edge of the suction opening (9a), and the suction grille (12) is rotated upward with the locked portion as a rotation center. As a result, the suction grill (12) is arranged so as to cover the entire air suction port (9a), and when the operator operates the operation knob, the suction grill (12) is connected to the detachable portion of the opening edge of the air suction port (9a). The suction grill (12) is attached to the decorative panel (9). On the other hand, at the time of cleaning the air filter (9c), maintenance of internal equipment, and the like, the operation reverse to the above is performed to rotate or remove the suction grill (12).

The closing surface portion (14) is shown in FIGS.
As shown in (1), the entire lower surface (front surface) is formed as a flat surface, so that the appearance from the indoor side is improved and the wiping workability when dirt adheres is ensured. On the other hand, as shown in FIG. 3, FIG. 8 (HH sectional view in FIG. 3), and FIG. 9 (II sectional view in FIG. , 22,...) Protrude, and the rigidity of the entire closed surface (14) is ensured. In addition, bosses (23, 23,...) Similar to those described above are provided with reinforcing ribs (22, 22,
)), And the rigidity of the closing surface portion (14) can be further improved by bridging a reinforcing member (not shown) similar to the above between the bosses (23, 23). It has become.

The closing surface portion (14) is located below the grille frame portion (13) as described above.
When it is attached to the decorative panel (9) as shown in FIG. A rectification space (30) which is a relatively large space is formed.

As shown in FIG. 2, the lower surface (surface) of the connecting portion (15) has a smooth surface between the bottom (13c) of the grille frame (13) and the surface of the closing surface (14). Is formed with a smooth surface that is continuous with On the other hand, the back surface of the connecting portion (15)
FIGS. 4 and 10 (cross-sectional views taken along the line JJ in FIG. 4) and FIGS.
As shown in the cross-sectional view taken along the line KK), the reinforcing ribs (22) on the back side of the closing surface (14) and the inner vertical wall (13a) of the grille frame (13) extend along the center in the width direction. Reinforcement ribs over corners (2
4) is protruding. Thereby, a high connection strength between the grill frame portion (13) and the closing surface portion (14) by the connection portion (15) is ensured. Reinforcing ribs (25, 2) which are bent upward are provided at both ends in the width direction of the connecting portion (15).
5) is provided, thereby improving the rigidity of the connecting portion (15).

The suction opening (17) formed between the grille frame (13), the closing surface (14), and the connecting portion (15) extends horizontally between the adjacent connecting portions (15, 15). Two bars extending in the direction
(28,28) are arranged in parallel. This bar (28) is shown in FIG.
As shown in FIG. 9, the air is guided so as to guide the air in a direction perpendicular to the direction of inclination of the inclined surface portion (see arrow in FIG. 9). Further, the cross-sectional contour of the outer edge (upstream end of the air flow) of the crosspiece (28) is formed in a substantially arc shape, so that the wiping operation when dirt adheres can be easily performed.

A pair of bars (28, 28) provided on the same inclined surface (16) are connected by two connecting members (29, 29) extending along the inclination direction of the inclined surface (16). Linked to each other. The connecting member (29, 29) has one end on the outer edge of the closed surface (14) and the other end on the inner vertical wall (1) of the grille frame (13).
3a). In other words, this connecting material (29,2
9), the bars (28, 28), the closing surface (14) and the grille frame (13) are connected to each other, and the support strength of each bar (28, 28) is sufficiently ensured. The vibration caused by the vibration is suppressed, and the abnormal noise generated by the vibration is suppressed.

Next, the operation of the air conditioner constructed as described above will be described. At the start of operation, the motor
The turbo fan (3) rotates with the drive of (4), and the refrigerant flows through the heat exchanger (6). This allows the indoor air to
Each suction opening (17) of the suction grill (12) is introduced into the inside of the grill (12). The air introduction direction at this time is a direction orthogonal to the inclination direction of the inclined surface portion (16). And
The air drawn into the grill (12) is
Dust is removed when passing through (9c) and the turbo fan (3)
Through the heat exchanger (6). At this time, heat is exchanged between the air and the refrigerant, and the air is temperature-adjusted (cooled during the cooling operation and heated during the heating operation) to be conditioned air, and is supplied from the air outlet (9b) to the room. Supplied to

In such an operation, when the air is introduced into the grill (12) from each suction opening (17) of the suction grill (12), the space between the air filter (9c) and each suction opening (17). Is
Since the rectifying space (30) is formed by disposing the closing surface portion (14) below, the pressure loss can be kept small even when the flow velocity of the suction air is high. That is, unlike the conventional case, the air filter is not disposed immediately downstream of the suction opening to increase the pressure loss of the air. Therefore, the opening area of the suction opening (17) is reduced and the suction Even if the flow velocity of the intake air at the opening (17) increases, the rectification action in the rectification space (30) causes the air to flow at a relatively low flow rate from the entire air filter (9c) and the air inside the casing (2). And the air-conditioning performance is maintained at a high level. Also, suction grill
Since the lower surface on the indoor side of the closed surface portion (14) in the central portion of (12) is flat, even if dirt adheres to this portion, the wiping operation is easy.

As described above, according to the present embodiment, it is possible to secure a portion where the dirt can be easily wiped off on the suction grill (12) while maintaining the air conditioning performance without increasing the pressure loss of the suction air. In addition, in the suction grill (12), a portion to which dirt is particularly liable to adhere is a peripheral portion of the suction opening (17) or a bar (28, 2).
8) However, since these are formed on the inclined surface portion (16) which is inclined upward from the outer edge of the closing surface portion (14) to the outside, dirt adheres to the entire surface of the suction grill as in the conventional case. Stain becomes less noticeable than that of the device, and the appearance of the device can be maintained well.

Also, as in the present embodiment, a turbo type fan
When (3) is adopted, the suction part of the fan (3) is
(9a), and in this state the suction grille (12)
If the opening area of the suction opening (17) becomes small, there is a concern that the pressure loss of the suction air becomes extremely large.However, in the present embodiment, due to the rectifying action in the rectifying space (30), this pressure loss increases. Almost no problem can be solved by using a turbo fan (3).

Further, a suction grill (12) and an air filter (9c)
When the gap between the air filter (9c) and the suction part of the blower (3) is small, the pressure loss of the suction air increases.However, if the suction grill (12) of this embodiment is used, the casing ( This problem can be solved without increasing the size of 2).
That is, for example, when the air filter (9c) is disposed below the conventional one by utilizing the rectifying space (30) formed between the suction grill (12) and the suction port (9a). In this case, since the above-mentioned intervals can be both large, the pressure loss is reduced and the air conditioning performance is improved.

In the present embodiment, the case where the present invention is applied to an air conditioner embedded in a ceiling has been described. However, the present invention can also be applied to an air conditioner of a suspended ceiling type. .

[0041]

As described above, according to the present invention, the following effects can be obtained. According to the first aspect of the present invention, the suction grill is formed at a central portion thereof, located at a lower side at a predetermined distance from the suction port, and has a flat lower surface on the indoor side; An inclined surface portion inclined upward and outward from the outer edge of the surface portion toward the opening edge of the suction port, and a suction opening for introducing indoor air is formed on the inclined surface portion, whereby the apparatus body is Since a straightening space is formed between the suction opening and the suction opening of the suction grill, a part of the suction grill is closed to reduce the area of the suction opening, and even if the flow velocity in the suction opening increases, the flow in the straightening space is reduced. The pressure loss of the intake air is reduced by the rectifying action, so that the air conditioning performance can be maintained high. Further, since the lower surface on the indoor side of the closed surface portion at the center portion of the suction grill is flat, even if dirt adheres to this portion, the wiping operation is easy. Therefore, according to the present invention, it is possible to secure a portion where the dirt can be easily wiped off on the suction grill without increasing the pressure loss of the suction air. In addition, in the suction grille, a portion to which dirt is particularly likely to adhere is a peripheral portion of the suction opening. However, since the suction opening is formed in the inclined surface portion, dirt adheres to the entire surface of the suction grill as in the related art. As a result, dirt is less noticeable, and the appearance of the apparatus can be maintained well.

According to the second aspect of the present invention, the effect of the first aspect of the present invention can be obtained for an air conditioner of four-way suction and four-way blowout, and the air conditioner can be put into practical use. Performance can be improved.

According to the third aspect of the present invention, since the crosspiece provided at the suction opening has a shape for guiding air in a direction perpendicular to the inclination direction of the inclined surface portion, it extends from the suction opening to the suction opening. The effect according to the first aspect of the present invention can be obtained while avoiding a rapid change in the air stream line.

According to the fourth aspect of the present invention, when a turbo type fan is used for the blower of the ceiling-mounted air conditioner, the suction portion of the fan comes close to the suction port of the device main body. If the opening area of the suction opening of the suction grill becomes small, there is a concern that the pressure loss of the suction air becomes extremely large.However, in the present invention, a rectifying space is provided between the suction opening of the apparatus main body and the suction opening of the suction grill. Due to the formation, the pressure loss hardly increases, and the problem due to the use of the turbo type fan can be solved.

According to the fifth aspect of the present invention, the predetermined gap is provided between the air filter and the closing surface of the suction grill and between the air filter and the suction section of the blower, so that the pressure loss of the suction air is reduced. Can be reduced, and the air conditioning performance can be improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an embedded ceiling air conditioner according to an embodiment.

FIG. 2 is a diagram showing a surface of a suction grill.

FIG. 3 is a diagram showing a back surface of the suction grill.

FIG. 4 is an enlarged view showing a rear corner portion of a suction grill.

5 (a) is a view taken in the direction of the arrow A in FIG. 2, and FIG. 5 (b) is a view taken in the direction of the arrow B in FIG.

6 (a) is a sectional view taken along line CC in FIG. 4, and FIG. 6 (b) is a sectional view taken along line DD in FIG.
3 (c) is a sectional view taken along the line EE of FIG. 4, and FIG.
It is a sectional view taken on line F.

FIG. 7 is a sectional view taken along line GG of FIG. 3;

FIG. 8 is a sectional view taken along line HH of FIG. 3;

FIG. 9 is a sectional view taken along line II of FIG. 3;

FIG. 10 is a sectional view taken along line JJ of FIG. 4;

FIG. 11 is a sectional view taken along the line KK of FIG. 4;

FIG. 12 is a diagram corresponding to FIG. 1 in a conventional example.

[Explanation of symbols]

 (1) In-ceiling air conditioner (2) Casing (3) Turbo fan (blower) (9) Decorative panel (9a) Air inlet (9b) Air outlet (9c) Air filter (12) Suction grill ( 14) Closed surface (16) Inclined surface (17) Suction opening (28) Crosspiece (R) Ceiling

Claims (5)

(57) [Claims] An air blower (3) is disposed inside the ceiling (R).
Suction port (9a) in the center of the lower surface of the device body (2, 9) installed in
However, outlets (9b) are respectively formed outside the inlet (9a),
A suction grill (12) is arranged below the suction port (9a), and is driven from the suction grill (12) by the driving of the blower (3) through the suction port (9a) to the apparatus body (2, 9). ) In a ceiling-mounted air conditioner that adjusts the temperature of room air sucked into the room and blows the room air from the outlet (9b) into the room, the suction grill (12) is formed at the center thereof and the suction port (9a) is formed. A closed surface portion (14), which is located on the lower side at a predetermined distance from the interior and has a flat lower surface on the indoor side, and from an outer edge portion of the closed surface portion (14) to an opening edge portion of the suction port (9a). Inclined surface part (16) inclined upward toward the outside
A ceiling-mounted air conditioner, characterized in that a suction opening (17) for introducing indoor air is formed in the inclined surface (16). 2. A lower surface of the apparatus body (2, 9) is rectangular, and an outlet (9b) of the apparatus body (2, 9) is formed so that air can be blown into a room in four directions. 4 for each side of the lower surface
The closed surface portion (14) of the suction grill (12) is rectangular, and the inclined surface portion (16) extends from each side of the closed surface portion (14) to the opening edge of the suction port (9a). It is arranged at four places to face
The ceiling installation according to claim 1, characterized in that (17, 17, ...) is formed on each inclined surface portion (16, 16, ...) corresponding to each outlet (9b, 9b, ...). Type air conditioner. 3. The suction opening (17) is provided with bars (25, 25) extending over both right and left edges of the suction opening (17), and the bars (25, 25) are provided with inclined surfaces (25, 25). The ceiling-mounted air conditioner according to claim 1, wherein the shape is such that air is guided in a direction orthogonal to the inclination direction of (16). 4. The ceiling-mounted air conditioner according to claim 1, wherein the blower is a turbo fan (3). 5. An air filter (9c) is provided at a suction port (9a) of the apparatus body (2, 9), and a closed surface (14) of the air filter (9c) and the suction grill (12) is provided. And air filter (9
The ceiling-mounted air conditioner according to claim 1 , wherein a predetermined interval is provided between c) and a suction portion of the blower (3).