# Patent

## Title
Indoor unit of an air conditioner

## Abstract

An air conditioner indoor unit has a casing main body and a front panel. The casing main body has an outlet for passing air out into a room. The front panel covers the outlet as seen in a front surface view. Furthermore, the front panel opens and closes the outlet. In addition, the front panel has a projection area greater than the outlet as seen in a front view when the outlet is closed.

## Background
CROSS-REFERENCE TO RELATED APPLICATIONS
This nonprovisional application claims priority under 35 U.S.C. §119(a) to Japanese Patent Application Nos. 2003-085382, filed in Japan on Mar. 26, 2004 and 2003-307094, filed in Japan on Aug. 29, 2003, the entire contents of which are hereby incorporated by reference.
FIELD OF THE INVENTION
The present invention relates to an indoor unit of an air conditioner.
RELATED ART
Air conditioner indoor units that air condition rooms have been frequently used in recent years. This indoor unit is often within the visual field of the occupants and the like because it is disposed indoors. Consequently, it is important that the indoor unit does not impair the aesthetics of the room. However, a casing of the indoor unit is usually provided with an outlet through which passes the air blown out into the room. The indoor unit air conditions the room by blowing out conditioned air from the outlet into the room. This outlet is often provided at the front of the casing of the indoor unit, and is therefore easily visible to the occupants and the like in the room. Accordingly, there is a risk of disrupting the harmony between the external appearance of the indoor unit, the wall surfaces and the like of the room, and there is a risk of impairing the aesthetics of the room.
On the other hand, a conventional air conditioner indoor unit as described above is often provided with a horizontal flap that opens and closes the outlet (refer to the specification in U.S. Pat. No. 3,334,688). This horizontal flap opens the outlet during operation of the indoor unit, and guides the air blown out from the outlet. Furthermore, the horizontal flap closes the outlet when operation of the indoor unit is stopped. This prevents the outlet from entering the visual field of the occupants and the like when operation of the indoor unit is stopped, and reduces the risk of impairing the aesthetics of the room.
However, there is still a risk with the above type of air conditioner indoor unit that the aesthetics of the room will be impaired. Namely, even if a horizontal flap 201 closes an outlet 202 as in an indoor unit 200 depicted in FIG. 11, it is often the case that a seam appears between the horizontal flap 201 and the outlet 202 in a front view.
With such an indoor unit, there is a risk of impairing the aesthetics of the room.
DISCLOSURE OF THE INVENTION
It is an object of the present invention to provide an air conditioner indoor unit that can reduce the risk of impairing the aesthetics of a room.
An indoor unit of an air conditioner according to a first aspect of the present invention has a casing and a front panel. The casing has an outlet through which passes air blown out into a room. The front panel covers the outlet in a front view, and opens and closes the outlet. In addition, in a state wherein the outlet is closed, the front panel has a projection area greater than the outlet as seen in a front surface view.
With this air conditioner indoor unit, the front panel that opens and closes the outlet has a projection area greater than the outlet in a front view. Consequently, the front panel can hide the outlet. This accordingly reduces the risk that a seam between the front panel and the outlet will appear in the indoor unit in a front view. Thereby, with this air conditioner indoor unit, the risk of impairing the aesthetics of the room can be further reduced.
An indoor unit of an air conditioner according to a second aspect is the indoor unit of an air conditioner as recited in the first aspect wherein the front panel has a width substantially the same as a width of the casing as seen in a front surface view.
With this air conditioner indoor unit, the front panel that opens and closes the outlet has a width substantially the same as the width of the casing, including the outlet, in a front view. Consequently, the front panel can cover the casing across the substantial entirety of the casing in the width direction. Accordingly, this air conditioner indoor unit can reduce the seams appearing in the surface of the indoor unit in a front view. Thereby, with this air conditioner indoor unit, the risk of impairing the aesthetics of the room can be further reduced.
An indoor unit of an air conditioner according to a third aspect is the indoor unit of an air conditioner as recited in the first or second aspect wherein the front panel does not have a seam extending in the longitudinal direction as seen in a front surface view.
With this air conditioner indoor unit, the front panel does not have a seam extending in the longitudinal direction in a front view. Consequently, not only does no seam appear between the front panel and the casing, but the seams appearing in the front panel itself are few. Thereby, with this air conditioner indoor unit, the risk of impairing the aesthetics of the room can be further reduced. Particularly because no seam extending in the longitudinal direction appears, the aesthetics provided to the occupants and the like in the room is further enhanced.
An indoor unit of an air conditioner according to a fourth aspect is the indoor unit of an air conditioner as recited in any one of the first through third aspects wherein the casing further comprises an inlet provided in the front surface and through which passes air taken in from the room. Further, the front panel comprises a first panel and a second panel. The first panel opens and closes the outlet, and has a projection area greater than the outlet in a front view in a state wherein the outlet is closed. The second panel opens and closes the inlet, and has a projection area greater than the inlet as seen in a front surface view in a state wherein the inlet is closed.
With a conventional air conditioner indoor unit, not only is the outlet disposed on the front surface, but the inlet is also disposed on the front surface. In this case, there is a risk that the inlet will impair the aesthetics of the room if it enters the visual field of the occupants and the like, the same as the outlet. In addition, it is conventional to provide a panel that opens and closes the inlet and to close the inlet when the operation of the air conditioner is stopped; however, the seam between the inlet and the panel appears in a front view, and there is consequently a risk of impairing the aesthetics of the room.
With this air conditioner indoor unit, the first panel has a projection area greater than the outlet in a front view in a state wherein the outlet is open. Consequently, the first panel can hide the outlet in a front view. In addition, the second panel has a projection area greater than the inlet in a front view in a state wherein the inlet is closed. Consequently, the second panel can hide the inlet in a front view. Thus, with this air conditioner indoor unit, the risk that the inlet or the outlet will impair the aesthetics of the room can be reduced.
An indoor unit of an air conditioner according to a fifth aspect is the indoor unit of an air conditioner as recited the fourth aspect wherein the first panel does not have a seam, and has a width substantially the same as the width of the casing, including the outlet, as seen in a front surface view. In addition, the second panel does not have a seam, and has a width substantially the same as the width of the casing, including the inlet, as seen in a front surface view.
With this air conditioner indoor unit, the first panel and the second panel have a width substantially the same as the width of the casing. Consequently, the first panel and the second panel can cover the casing across substantially the entirety of the casing in the width direction. In addition, the first panel and the second panel respectively have no seams. Consequently, the seams appearing in the indoor unit in a front view can be reduced. Thereby, with this air conditioner indoor unit, the risk of impairing aesthetics can be reduced.
An indoor unit of an air conditioner according to a sixth aspect is the indoor unit of an air conditioner as recited in any one of the first through third aspects wherein the casing further comprises an inlet provided on the front surface and through which passes air taken in from the room. In addition, the front panel opens and closes the outlet and the inlet, and is a seamless member that covers the outlet and the inlet of the casing as seen in a front surface view in a state wherein the outlet and the inlet are closed.
With this air conditioner indoor unit, the seamless front panel covers both the inlet and the outlet. Consequently, seams appearing in the indoor unit in a front view can be further reduced. Thereby, with this air conditioner indoor unit, the risk of impairing aesthetics can be further reduced.
An indoor unit of an air conditioner according to a seventh aspect is the indoor unit of an air conditioner as recited in the sixth aspect wherein the front panel has a width substantially the same as the width of the casing as seen in a front surface view.
With this air conditioner indoor unit, a single, seamless front panel covers the casing across the substantial entirety of the casing in the width direction. Consequently, seams appearing in the indoor unit in a front view can be further reduced. Thereby, with this air conditioner indoor unit, the risk of impairing aesthetics can be further reduced.
An indoor unit of an air conditioner according to an eighth aspect is the indoor unit of an air conditioner as recited in any one of the first through seventh aspects wherein the front panel covers substantially the entirety of the front surface of the casing as seen in a front surface view.
With this air conditioner indoor unit, the front panel covers the substantial entirety of the front surface of the casing. Consequently, with this air conditioner indoor unit, the seams appearing in the indoor unit in a front view can be further reduced. Thereby, with this air conditioner indoor unit, the risk of impairing aesthetics can be further reduced.
An indoor unit of an air conditioner according to a ninth aspect is the indoor unit of an air conditioner as recited in any one of the first through eighth aspects wherein in a state wherein the outlet is closed, the front side of the front panel is a flat surface parallel to the vertical direction.
With this air conditioner indoor unit, the front side of the front panel forms a flat surface parallel to the vertical direction in a state wherein the outlet is closed. Accordingly, with this air conditioner indoor unit, the harmony between the external appearance of the indoor unit in a front view and the side walls of the room is improved. Thereby, with this air conditioner indoor unit, the aesthetics can be further enhanced.
An indoor unit of an air conditioner according to a tenth aspect is the indoor unit of an air conditioner as recited in the fourth or fifth aspect wherein the front panel further comprises a third panel. The third panel is disposed between the first panel and the second panel, and has no seams as seen in a front surface view. Further, in a state wherein the outlet and the inlet are closed, the first panel, the second panel, and the third panel are disposed so that they constitute a substantially flat surface.
With this air conditioner indoor unit, the first panel, the second panel, and the third panel are disposed so that they constitute a substantially flat surface in a state wherein the outlet and the inlet are closed. Consequently, when the operation of the indoor unit is stopped, and the like, the substantially flat surface appears in the indoor unit, thereby enabling the aesthetics of the indoor unit to be further enhanced.
An indoor unit of an air conditioner according to an eleventh aspect is the indoor unit of an air conditioner as recited in the tenth aspect wherein the movement of the first panel to the rear of the third panel opens the outlet.
With this air conditioner indoor unit, the first panel moves to the rear of the third panel if the outlet is open. Consequently, the aesthetics of the indoor unit in a state wherein the outlet is open can be further enhanced.
An indoor unit of an air conditioner according to a twelfth aspect is the indoor unit of an air conditioner as recited in the fourth or fifth aspect wherein the movement of the second panel so that it is spaced apart from the inlet opens the inlet. Further, the movement of the first panel to between the casing and the second panel, which has moved so that it is spaced apart from the inlet, opens the outlet.
With this air conditioner indoor unit, the first panel moves between the second panel and the casing if the outlet is open. Consequently, the aesthetics of the indoor unit in a state wherein the outlet is open can be further enhanced.
An indoor unit of an air conditioner according to a thirteenth aspect is the indoor unit of an air conditioner as recited in the twelfth aspect wherein the first panel and the second panel are arrayed vertically on the front surface of the casing, with the first panel disposed on the lower side and the second panel disposed on the upper side. Further, the movement of the second panel frontward opens the inlet. In addition, the movement of the first panel upward, and the movement of the first panel to the rear of the second panel, which has moved frontward, opens the outlet.
With this air conditioner indoor unit, the first panel moves to the rear of the second panel if the outlet is open. Consequently, the aesthetics of the indoor unit in a state wherein the outlet is open can be further enhanced.
An indoor unit of an air conditioner according to a fourteenth aspect is the indoor unit of an air conditioner as recited in the thirteenth aspect wherein in a state wherein the inlet is open, the second panel enters a state wherein its upper end is inclined frontward.
With this air conditioner indoor unit, the upper end of the second panel enters a state inclined frontward in a state wherein the inlet is open. Accordingly, when the air conditioner indoor unit is viewed from below, the second panel appears relatively large, thereby making it difficult to externally see the inlet. Consequently, the aesthetics of the air conditioner indoor unit in a state wherein the inlet is open can be further enhanced.
An indoor unit of an air conditioner according to a fifteenth aspect is the indoor unit of an air conditioner as recited in the thirteenth or fourteenth aspect wherein in a state wherein the inlet is open, the lower end of the second panel is positioned upward of the outlet, which is positioned below the inlet.
With this air conditioner indoor unit, in a state wherein the inlet is open, the lower end of the second panel is positioned upward of the outlet. Consequently, there is little risk that the second panel will hinder the blow out of air.
An indoor unit of an air conditioner according to a sixteenth aspect is the indoor unit of an air conditioner as recited in any one of the twelfth through fifteenth aspects wherein when the outlet opens, the first panel moves in a state wherein it is proximate to the casing.
With this air conditioner indoor unit, the first panel moves in a state proximate to the casing when the outlet opens, and the gap between the first panel and the casing is consequently small. Accordingly, it is possible to suppress the generation of a short circuit wherein air blown out from the outlet unfortunately leaks from between the first panel and the casing.



BRIEF EXPLANATION OF DRAWINGS
FIG. 1 depicts the constitution of the air conditioner and a refrigerant circuit according to the first embodiment.
FIG. 2(a) is a front view of the indoor unit when operation is stopped according to the first embodiment.
FIG. 2(b) is a side cross sectional view of the indoor unit when operation is stopped according to the first embodiment.
FIG. 3(a) is a front view during operation of the indoor unit according to the first embodiment.
FIG. 3(b) is a side cross sectional view during operation of the indoor unit according to the first embodiment.
FIG. 4(a) is a front view of the indoor unit when operation is stopped according to the second embodiment.
FIG. 4(b) is a side cross sectional view of the indoor unit when operation is stopped according to the second embodiment.
FIG. 5(a) is a front view during operation of the indoor unit according to the second embodiment.
FIG. 5(b) is a side cross sectional view during operation of the indoor unit according to the second embodiment.
FIG. 6(a) is a side cross sectional view of the indoor unit when operation is stopped according to the third embodiment.
FIG. 6(b) is a side cross sectional view during operation of the indoor unit according to the third embodiment.
FIG. 7(a) is a front view of the indoor unit when operation is stopped according to the fourth embodiment.
FIG. 7(b) is a side cross sectional view of the indoor unit when operation is stopped according to the fourth embodiment.
FIG. 8(a) is a front view during operation of the indoor unit according to the fourth embodiment.
FIG. 8(b) is a side cross sectional view during operation of the indoor unit according to the fourth embodiment.
FIG. 9(a) is a side cross sectional view during operation of the indoor unit according to another embodiment.
FIG. 9(b) is a side cross sectional view during operation of the indoor unit according to another embodiment.
FIG. 9(c) is a side cross sectional view during operation of the indoor unit according to another embodiment.
FIG. 10 is a side cross sectional view during operation of the indoor unit according to another embodiment.
FIG. 11 is a front view of the conventional air conditioner indoor unit.
FIG. 12(a) is a front view of the indoor unit when operation is stopped according to the fifth embodiment.
FIG. 12(b) is a side cross sectional view of the indoor unit when operation is stopped according to the fifth embodiment.
FIG. 13 depicts the operation of the front panel at the start of operation of the indoor unit according to the fifth embodiment.
FIG. 14 depicts the operation of the front panel at the start of operation of the indoor unit according to the sixth embodiment.



PREFERRED EMBODIMENTS
First Embodiment
Air Conditioner Overall Constitution
FIG. 1 depicts the constitution of an air conditioner 1 and a schematic of the refrigerant circuit according to the first embodiment of the present invention.
This air conditioner 1 comprises an indoor unit 2a attached to a wall surface, and the like, of the room, and an outdoor unit 3 installed outdoors.
The refrigerant circuit of this air conditioner 1 principally comprises an indoor heat exchanger 20, an accumulator 31, a compressor 32, a four way switching valve 33, an outdoor heat exchanger 30, and a motor operated expansion valve 34.
The indoor heat exchanger 20 provided in the indoor unit 2a exchanges heat with the air that it contacts. In addition, the indoor unit 2a is provided with an indoor fan 21 that sucks in the indoor air, passes it through the indoor heat exchanger 20, exchanges its heat, and then discharges that air into the room. An indoor fan motor 22 provided inside the indoor unit 2a rotatably drives the indoor fan 21. The detailed constitution of the indoor unit 2a will be explained later.
The outdoor unit 3 comprises the compressor 32, the four way switching valve 33 connected to the discharge side of the compressor 32, the accumulator 31 connected to the inlet side of the compressor 32, the outdoor heat exchanger 30 connected to the four way switching valve 33, and the motor operated expansion valve 34 connected to the outdoor heat exchanger 30. The motor operated expansion valve 34 is connected to a piping 41 via a filter 35 and a liquid shutoff valve 36, and is connected to one end of the indoor heat exchanger 20 via this piping 41. In addition, the four way switching valve 33 is connected to a piping 42 via a gas shutoff valve 37, and is connected to the other end of the indoor heat exchanger 20 via this piping 42. In addition, the outdoor unit 3 comprises an outdoor fan 38 for externally discharging the air after its heat has been exchanged by the outdoor heat exchanger 30. An outdoor fan motor 39 rotatably drives this outdoor fan 38.
<Indoor Unit Constitution>
FIG. 2(a) is a front view of the indoor unit 2a, and FIG. 2(b) is a side cross sectional view of the indoor unit 2a. FIG. 2(a) and FIG. 2(b) depict the indoor unit 2a when operation is stopped.
The indoor unit 2a is a wall mounted type indoor unit provided on a side wall of a room, and comprises a casing main body 23 (casing), and a front panel 24a. 
<Casing Main Body>
The casing main body 23 has a long rectangular shape in the horizontal direction in a front view, and has a long rectangular cross sectional shape in the vertical direction in a side view. The inside of the casing main body 23 comprises the above discussed indoor heat exchanger 20, the indoor fan 21, the indoor fan motor 22 (not shown), and the like. As depicted in FIG. 2(b), in a side view, the indoor fan 21 is disposed in the center of the casing main body 23, and the indoor heat exchanger 20 having an inverted V shape is disposed so that it surrounds the upper half of the indoor fan 21. In addition, the casing main body 23 comprises an inlet 25, and an outlet 26.
The inlet 25 is an opening through which passes the air taken in by the indoor fan 21 from the room into the casing main body 23, and comprises a first inlet 27 (inlet) and a second inlet 28. The first inlet 27 has a long shape in the horizontal direction in a front view, and its length is slightly less than the width W of the casing main body 23. As depicted in FIG. 2(b), the first inlet 27 is provided in the vicinity of the center in the front surface of the casing main body 23, opposing the front side of the indoor heat exchanger 20. The second inlet 28 comprises a plurality of long slits in the longitudinal direction of the casing main body 23, and is provided in the top surface of the casing main body 23.
The outlet 26 is an opening through which passes the air blown out by the indoor fan 21 through the indoor heat exchanger 20 into the room. The outlet 26 has a long shape in the horizontal direction, as depicted in FIG. 3(a), and its length is slightly less than the width W of the casing main body 23. In addition, the outlet 26 is in the vicinity of the lower part of the casing main body 23, and is provided in the front surface of the casing main body 23. Furthermore, FIG. 3(a) is a front view of the indoor unit 2a during operation.
In addition, a horizontal flap 29 is provided in the vicinity of the outlet 26. The horizontal flap 29 is a plate shaped member having a long shape in the longitudinal direction of the indoor unit 2a, and guides air blown out from the outlet 26. The horizontal flap 29 has a rotational axis parallel to the longitudinal direction of the indoor unit 2a, and rotates about the rotational axis, thereby modifying the guide direction of the air.
<Front Panel>
The front panel 24a covers the outlet 26 and the first inlet 27 in a front view, and opens and closes the outlet 26 and the first inlet 27. The front panel 24a is a panel assembly that aggregates a seamless plurality of panels, and has a first panel 241 and a second panel 242.
The first panel 241 is disposed at the lower part of the front surface of the casing main body 23. The first panel 241 is movably supported by a moving mechanism (not shown), and opens and closes the outlet 26. The first panel 241 is a rectangular plate shaped member having no seams, whose width is substantially the same as the width W of the casing main body 23 in a front view, and whose height is approximately half a height H of the casing main body 23. In the state wherein the outlet 26 is closed, the first panel 241 is in a state parallel to the vertical direction, as depicted in FIG. 2(b). In addition, in this state, the first panel 241 has a projection area larger than the outlet 26 in a front view. Accordingly, in the state wherein the outlet 26 is closed, the first panel 241 covers the entire lower half of the front surface of the casing main body 23, including the outlet 26.
The second panel 242 is disposed at the upper part of the front surface of the casing main body 23. The second panel 242 is movably supported by the moving mechanism (not shown), and opens and closes the first inlet 27. The second panel 242 is a rectangular plate shaped member having no seams, the same as the first panel 241, whose width is substantially the same as the width W of the casing main body 23, including the first inlet 27 in a front view, and whose height is approximately half the height H of the casing main body 23. In a state wherein the first inlet 27 is closed, the second panel 242 is in a state parallel to the vertical direction, as depicted in FIG. 2(b). In addition, in this state, the second panel 242 is positioned at the upper part of and aligned with the first panel 241, and has a projection area larger than the first inlet 27 in a front view. Accordingly, in a state wherein the first inlet 27 is closed, the second panel 242 covers the entire upper half of the front surface of the casing main body 23, including the first inlet 27.
Thus, in a state wherein the outlet 26 is closed, the first panel 241 covers the entire lower half of the front surface of the casing main body 23, including the outlet 26; and in a state wherein the first inlet 27 is closed, the second panel 242 covers the entire upper half of the front surface of the casing main body 23, including the first inlet 27. In addition, the first panel 241 and the second panel 242 are arrayed vertically, without any gaps. Consequently, in a state wherein the outlet 26 and the first inlet 27 are closed, the front panel 24a comprising the first panel 241 and the second panel 242 is in a state that substantially completely covers the entire front surface of the indoor unit 2a, as depicted in FIG. 2(a). Accordingly, in this state, only the front panel 24a enters the visual field of the occupants and the like in a front view, and the outlet 26 and the first inlet 27 do not enter the visual field of the occupants and the like. In addition, no seams appear on the surface of the front panel 24a, excepting the seam extending in the horizontal direction formed by the upper edge of the first panel 241 and the lower edge of the second panel 242. Furthermore, the first panel 241 is parallel to the vertical direction, and the second panel 242 is also parallel to the vertical direction. Consequently, in a state wherein the outlet 26 and the first inlet 27 are closed, the front panel 24a forms a flat surface 243 parallel to the vertical direction.
<Operation of the Indoor Unit>
The following explains operation for the case in which the indoor unit 2a of the air conditioner 1 performs air conditioning operation.
If the indoor unit 2a is stopped, then the front panel 24a is in a state wherein the outlet 26 and the first inlet 27 are closed, as described above.
If the indoor unit 2a is in operation, first, the indoor fan 21 is started at low speed.
Next, the front panel 24a moves, and the outlet 26 and the first inlet 27 open. Thereby, the volume of air taken into the indoor unit 2a is ensured, and air is blown out in the horizontal direction. In this case, as depicted in FIG. 3(b), the second panel 242 moves frontward in parallel. Thereby, the first inlet 27 opens. In addition, the first panel 241 moves vertically upward, linked to the movement of this second panel 242. Further, part of the upper side of the first panel 241 is inserted between the second panel 242 and the casing main body 23. Thereby, the outlet 26 opens.
After the front panel 24a moves and the outlet 26 and the first inlet 27 are opened, the horizontal flap 29 rotatably moves so that it forms a blow out angle corresponding to the operation mode that was set.
Thus, the indoor unit 2a operates as described above.
If operation of the indoor unit 2a stops, then the front panel 24a moves, and returns to a state wherein the outlet 26 and the first inlet 27 are closed, as depicted in FIG. 2(a) and FIG. 2(b).
<Features>
<1>
With the indoor unit 2a of this air conditioner 1, the front panel 24a when operation is stopped covers the entire front surface of the indoor unit 2a. Furthermore, the front panel 24a forms the flat surface 243 parallel to the vertical direction. Consequently, when operation of the indoor unit 2a is stopped, only the flat front panel 24a in a front view appears in the visual field of the occupants and the like. In addition, only the seam extending in the transverse direction (the horizontal direction), which is the boundary between the first panel 241 and the second panel 242, appears in the surface of the front panel 24a, and no other seams appear. Accordingly, with this indoor unit 2a, in a front view, the seam extending in the longitudinal direction (the vertical direction) does not appear, and the seam extending in the transverse direction is also minimized. Consequently, with the indoor unit 2a of this air conditioner 1, the external appearance of the indoor unit 2a when operation is stopped in a front view harmonizes with the wall surfaces of the room, thereby enhancing aesthetics.
<2>
Because a wall mounted indoor unit is generally disposed on a wall surface of a room, the front portion tends to enter the visual field of the occupants and the like. In addition, the surface area of the front portion of the indoor unit is relatively large. Consequently, the present invention, which improves aesthetics in a front view when operation is stopped, is particularly effective.
<3>
With the indoor unit 2a of this air conditioner 1, the movement of the first panel 241 and the second panel 242 during operation opens the outlet 26 and the first inlet 27. Consequently, air can be sufficiently sucked into the indoor unit 2a and be sufficiently blown out from the indoor unit 2a. 
In addition, when the outlet 26 and the first inlet 27 open, the first panel 241 should move vertically, and the second panel 242 should move slightly frontward. Consequently, there is little increase of a depth D of the indoor unit 2a during operation (refer to FIG. 3(b)). Consequently, with the indoor unit 2a of this air conditioner 1, the indoor unit 2a can be compactly constituted during operation.
<4>
With the indoor unit 2a of this air conditioner 1, the indoor fan 21 is started at low speed before the front panel 24a opens. In this case, because the indoor fan 21 rotates in a state wherein the front panel 24a is closed, the air in the interior of the indoor unit 2a is agitated. Thereby, the smell confined to the interior of the indoor unit 2a is absorbed in the moisture condensed in the indoor heat exchanger 20 during cooling operation. Accordingly, odors that leak into the room can be reduced. In addition, by leaving the front panel 24a closed until the temperature of the indoor heat exchanger 20 rises during heating, the feeling of drafts during operation initialization can be reduced.
Second Embodiment
FIG. 4(a) and FIG. 4(b) depict an indoor unit 2b of the air conditioner 1 according to the second embodiment of the present invention. FIG. 4(a) is a front view of the indoor unit 2b when operation is stopped, and FIG. 4(b) is a side cross sectional view of the indoor unit 2b when operation is stopped.
This indoor unit 2b comprises a front panel 24b that covers substantially the entire front surface of the casing main body 23. This front panel 24b is a single, flat plate shaped member having no seams in a front view, and forms a flat surface 244 parallel to the vertical direction in a state wherein the outlet 26 and the first inlet 27 are closed. In addition, the front panel 24b has a long rectangular shape in the horizontal direction in a front view, and has a width substantially the same as the width W of the casing main body 23, including the outlet 26 and the first inlet 27 in a front view. The front panel 24b opens and closes the outlet 26 and the first inlet 27, and covers the outlet 26 and the first inlet 27 in a front view in a state wherein the outlet 26 and the first inlet 27 are closed.
The following explains the operation of the indoor unit 2b during operation. FIG. 5(a) depicts a front view of the indoor unit 2b during operation, and FIG. 5(b) is a side cross sectional view of the indoor unit 2b during operation.
When the indoor unit 2b starts operation, the front panel 24b moves, and opens the outlet 26 and the first inlet 27. The front panel 24b moves vertically upward, and its upper end rotatably moves about the lower end in a direction away from the casing main body 23. Thus, the movement of the front panel 24b upward opens the outlet 26, and the rotational movement of the front panel 24b opens the first inlet 27.
Other aspects of the constitution and operation are the same as the indoor unit 2a according to the first embodiment.
<Features>
With the indoor unit 2b of this air conditioner 1, a single, seamless front panel 24b covers both the inlet 25 and the outlet 26. Consequently, a seam does not appear in a front view of the indoor unit 2b. In addition, the flat surface 244 formed by the front panel 24b gives the occupants and the like a feeling of simplicity. Thereby, with the indoor unit 2b of this air conditioner 1, the external appearance of the indoor unit 2b when operation is stopped in a front view harmonizes with the wall surfaces of the room, and thereby enhances aesthetics.
Third Embodiment
FIG. 6(a) and FIG. 6(b) depict an indoor unit 2c of the air conditioner 1 according to the third embodiment of the present invention. FIG. 6(a) is a side cross sectional view of the indoor unit 2c when operation is stopped, and FIG. 6(b) is a side cross sectional view of the indoor unit 2c during operation.
This indoor unit 2c comprises a front panel 24c that covers the entire front surface of the indoor unit 2c. The front panel 24c opens and closes the outlet 26 and the first inlet 27. In a state wherein the outlet 26 and the first inlet 27 are closed, the front panel 24c covers the outlet 26 and the first inlet 27 in a front view. This front panel 24c is a plate shaped member having no seams in a front view, and comprises a first flat surface part 245 and a second flat surface part 246. The first flat surface part 245 and the second flat surface part 246 are both flat plate shaped. The first flat surface part 245 is parallel to the vertical direction, and closes the first inlet 27. The second flat surface part 246 is disposed inclined along the shape of the exit of the outlet 26, and closes the outlet 26. The upper end of the second flat surface part 246 is joined to the lower end of the first flat surface part 245 at a prescribed angle. The first flat surface part 245 and the second flat surface part 246 are seamlessly integrated. In addition, the first flat surface part 245 and the second flat surface part 246 respectively have long rectangular shapes in the horizontal direction, and have widths substantially the same as the width W of the casing main body 23.
The following explains the operation of the indoor unit 2c during operation.
When the indoor unit 2c starts operation, the front panel 24c moves, and opens the outlet 26 and the first inlet 27. At this time, the front panel 24c moves frontward in an inclined upward direction. Furthermore, the front panel 24c may also move directly in a frontward inclined upward direction, and may also move by combining the frontward parallel movement and the upward movement. The movement of the front panel 24c moves the first flat surface part 245 away from the first inlet 27, and opens the first inlet 27. In addition, the second flat surface part 246 moves away from the outlet 26, and opens the outlet 26.
Other aspects of the constitution are the same as the indoor unit 2a according to the first embodiment.
<Features>
With the indoor unit 2c of this air conditioner 1, a seamless single front panel 24c covers both the inlet 25 and the outlet 26 when operation is stopped. Consequently, when operation of the indoor unit 2c is stopped, seams do not appear in the indoor unit 2c in a front view. In addition, the second flat surface part 246 of the front panel 24c is formed along the outlet 26. Consequently, even if the side surface shape of the casing main body 23 is not rectangular and instead the exit of the outlet 26 is shaped inclined, the front surface of the indoor unit 2c can be covered by a seamless, flat and smooth front panel 24c. Thereby, with the indoor unit 2c of this air conditioner 1, the external appearance of the indoor unit 2c in a front view when operation is stopped harmonizes with the wall surfaces of the room, thereby improving aesthetics.
Fourth Embodiment
Constitution
FIG. 7(a), FIG. 7(b), FIG. 8(a) and FIG. 8(b) depict an indoor unit 2d of the air conditioner 1 according to the fourth embodiment of the present invention. FIG. 7(a) is a front view of the indoor unit 2d when operation is stopped, and FIG. 7(b) is a side cross sectional view of the indoor unit 2d when operation is stopped. In addition, FIG. 8(a) is a front view of the indoor unit 2d during operation, and FIG. 8(b) is a side cross sectional view of the indoor unit 2d during operation.
The indoor unit 2d comprises a front panel 24d that covers substantially the entire front surface of the casing main body 23. The front panel 24d is a panel assembly that aggregates a plurality of seamless panels, and comprises a first panel 247 and a second panel 248.
The first panel 247 is disposed at the lower part of the front surface of the casing main body 23. The first panel 247 is movably supported by the moving mechanism (not shown), and opens and closes the outlet 26. The first panel 247 is a seamless, rectangular, plate shaped member, and has a width substantially the same as the width W of the casing main body 23 in a front view. In a state wherein the outlet 26 is closed, the first panel 247 is in a state parallel to the vertical direction, as depicted in FIG. 7(b). In addition, in this state, the first panel 247 has a projection area larger than the outlet 26 in a front view. Accordingly, in a state wherein the outlet 26 is closed, the first panel 247 completely covers the lower part of the front surface of the casing main body 23, including the outlet 26.
The second panel 248 is disposed at the upper part of the front surface of the casing main body 23. The second panel 248 is movably supported by the moving mechanism (not shown), and opens and closes the first inlet 27. The second panel 248 comprises a first part 248a and a second part 248b. The first part 248a and the second part 248b are respectively seamless, rectangular, plate shaped members, and have widths substantially the same as the width W of the casing main body 23, including the first inlet 27, in a front view. In a state wherein the first inlet 27 is closed, the first part 248a and the second part 248b are in a state parallel to the vertical direction, as depicted in FIG. 7(b). The second part 248b is positioned at the lower part of the first part 248a, and protrudes frontward from the first part 248a. In addition, in this state, the second part 248b is positioned at the upper part of the first panel 247. Further, the lower end of the second part 248b is positioned frontward of the upper end of the first panel 247, and is positioned so that it overlaps the upper end of the first panel 247. In addition, the second panel 248 has a projection area larger than the first inlet 27 in a front view. Accordingly, in a state wherein the first inlet 27 is closed, the second panel 248 completely covers the upper half of the front surface of the casing main body 23 including the first inlet 27.
Thus, in a state wherein the outlet 26 is closed, the first panel 247 completely covers the lower part of the front surface of the casing main body 23, including the outlet 26; and in a state wherein the first inlet 27 is closed, the second panel 248 completely covers the upper part of the front surface of the casing main body 23, including the first inlet 27. In addition, the first panel 247 and the second panel 248 are arrayed vertically, and part of the lower end of the second panel 248 overlaps the upper end of the first panel 247.
Other aspects of the constitution and the operation of the indoor unit 2d are the same as the indoor unit 2a according to the first embodiment.
<Features>
With the indoor unit 2d of this air conditioner 1, in a state wherein the outlet 26 and the first inlet 27 are closed by the front panel 24d, part of the lower end of the second panel 248 overlaps the upper end of the first panel 247. Consequently, it is difficult to see, in a front view, the gap between the first panel 247 and the second panel 248. Thereby, with the indoor unit 2d of this air conditioner 1, the external appearance of the indoor unit 2d when operation is stopped in a front view further harmonizes with the wall surfaces of the room, and thereby further enhances aesthetics.
Fifth Embodiment
Constitution
FIG. 12(a) and FIG. 12(b) depict an indoor unit 2e of the air conditioner 1 according to the fifth embodiment of the present invention. FIG. 12(a) is a front view of the indoor unit 2e when operation is stopped, and FIG. 12(b) is a side cross sectional view of the indoor unit 2e when operation is stopped.
This indoor unit 2e comprises a front panel 24e that covers substantially the entire surface of the casing main body 23. The front panel 24e is a panel assembly that aggregates a plurality of seamless panels 250-251, and comprises the first panel 250, the second panel 251, and a third panel 252.
The first panel 250 is disposed at the lower part of the front surface of the casing main body 23. The first panel 250 is supported capable of being moved by the moving mechanism (not shown) parallel to the vertical direction, and opens and closes the outlet 26. The first panel 250 is a seamless, rectangular plate shaped member, and has a width substantially the same as the width W of the casing main body 23 in a front view. In a state wherein the outlet 26 is closed, the first panel 250 is in a state parallel to the vertical direction, as depicted in FIG. 12(b). In addition, in this state, the first panel 250 has a projection area larger than the outlet 26 in a front view. Accordingly, in a state wherein the outlet 26 is closed, the first panel 250 completely covers the lower part of the front surface of the casing main body 23, including the outlet 26.
The second panel 251 is disposed at the upper part of the front surface of the casing main body 23. The second panel 251 is movably supported by the moving mechanism (not shown), and opens and closes the first inlet 27. The second panel 251 is a seamless, rectangular plate shaped member, and has a width substantially the same as the width W of the casing main body 23, including the first inlet 27, in a front view. In a state wherein the first inlet 27 is closed, the second panel 251 is in a state parallel to the vertical direction, as depicted in FIG. 12(b). In addition, the second panel 251 has a projection area larger than the first inlet 27 in a front view. Accordingly, in a state wherein the first inlet 27 is closed, the second panel 251 completely covers the upper half of the front surface of the casing main body 23, including the first inlet 27.
The third panel 252 is disposed between the first panel 250 and the second panel 251. The third panel 252 has a seamless, rectangular shape in a front view. The third panel 252 has a width W substantially the same as the indoor unit 2e, and has a length substantially the same as the first panel 250 in the vertical direction. The vicinities of the left and right end parts of the third panel 252 are respectively fixed to the left and right side surfaces of the casing main body 23, and the third panel 252 is arranged so that the front surface portion of the third panel 252 is spaced apart from the casing main body 23 in the forward-rear direction. Namely, a gap is formed between the casing main body 23 and the rear part of the third panel 252. This gap is formed slightly larger than the thickness of the first panel 250 disposed below, and forms a space that houses the first panel 250 that moves for the purpose of opening the outlet 26.
Thus, in a state wherein the outlet 26 is closed, the first panel 250 completely covers the lower part of the front surface of the casing main body 23, including the outlet 26; and in a state wherein the first inlet 27 is closed, the second panel 251 completely covers the upper part of the front surface of the casing main body 23, including the first inlet 27. In addition, the first panel 250, the second panel 251, and the third panel 252 are arrayed vertically and, in a state wherein the outlet 26 and the first inlet 27 are closed, are disposed so that they constitute a substantially flat, rectangular flat surface. The front panel 24e, comprising the first panel 250, the second panel 251, and the third panel 252, substantially covers the front surface of the indoor unit 2e in a state wherein the outlet 26 and the first inlet 27 are closed, and only the seams formed by the boundaries of the first panel 250, the second panel 251, and the third panel 252 appear in a front view. Namely, only the seams extending in the horizontal direction formed by the boundary between the first panel 250 and the third panel 252 and the boundary between the second panel 251 and the third panel 252 appear in the front view.
Other aspects of the constitution are the same as the indoor unit 2a according to the first embodiment.
<Operation of the Front Panel at the Start of Operation>
When the indoor unit 2e starts operation, the first panel 250 and the second panel 251 move, thereby opening the outlet 26 and the first inlet 27. The following explains the operation of the front panel 24e, referencing FIG. 13(a), FIG. 13(b), and FIG. 13(c). Furthermore, FIG. 13(a), FIG. 13(b), and FIG. 13(c) are side views of the indoor unit 2e. 
In a state wherein the operation of the indoor unit 2e is stopped, the first panel 250 and the second panel 251 close the outlet 26 and the first inlet 27, and, as depicted in FIG. 13(a), the first panel 250, the second panel 251, and the third panel 252 are arrayed substantially linearly in a side view parallel to the vertical direction. In addition, the surface of the first panel 250, the second panel 251, and the third panel 252 is substantially flat.
When operation of the indoor unit 2e starts, the first panel 250 and the second panel 251 move, thereby opening the outlet 26 and the first inlet 27.
As depicted in FIG. 13(b), the first panel 250 moves in parallel upward in the vertical direction, thereby opening the outlet 26. When the first panel 250 moves upward in the vertical direction, the upper end of the first panel 250 enters the gap of the rear part of the third panel 252. When the first panel 250 moves further upward, the first panel 250 is housed in the gap between the third panel 252 and the casing main body 23, as depicted in FIG. 13(c), and enters a state wherein it is hidden behind the third panel 252. Namely, the substantial entirety of the first panel 250 enters a state wherein it is overlapped by the third panel 252.
The second panel 251 also moves linked to such movement of the first panel 250. As depicted in FIG. 13(b), the second panel 251 moves frontward, and rotates about an axis parallel to the lateral direction, in a front view. The second panel 251 rotates about the vicinity of the lower end thereof as the center, so that its upper end is inclined frontward. The second panel 251 moves further, as depicted in FIG. 13(c), and forms a gap between the casing main body 23 and the second panel 251. Thereby, the first inlet 27 opens. Further, air is sucked in from the gap between the upper end of the second panel 251 and the casing main body 23, and air is sucked in from the first inlet 27 into the casing main body 23.
In addition, when operation of the indoor unit 2e is stopped, the first panel 250 and the second panel 251 move in the reverse direction of that described above, thereby returning to a flat state.
<Features>
<1>
With the indoor unit 2e of this air conditioner 1, the substantial entirety of the front surface when operation is stopped is covered by the front panel 24e. The first panel 250, the second panel 251, and the third panel 252 that constitute the front panel 24e are disposed so that they form a substantially flat surface when operation of the indoor unit 2e is stopped, which minimizes the seams appearing on the surface. Consequently, when operation of the indoor unit 2e is stopped, the indoor unit 2e better harmonizes with the wall surfaces of the room, thereby enhancing aesthetics.
<2>
With the indoor unit 2e of this air conditioner 1, the movement of the first panel 250 and the second panel 251 at the start of operation as described above opens the first inlet 27 and the outlet 26. Thereby, a sufficient air intake and blow out air volume can be ensured. In addition, air can also be sufficiently blown out in the horizontal direction.
Furthermore, in a state wherein the outlet 26 is open, the first panel 250 moves to the rear part of the third panel 252, and enters a state wherein it is hidden by the third panel 252. Consequently, the first panel 250 does not hinder the inlet or blow out of air during operation, and the aesthetics in a front view is enhanced.
Sixth Embodiment
Constitution
FIG. 14(a) to FIG. 14(c) depict an indoor unit 2f of the air conditioner 1 according to the sixth embodiment of the present invention. Furthermore, FIG. 14(a) to FIG. 14(c) are side views of the indoor unit 2f of the air conditioner 1.
This indoor unit 2f comprises a front panel 24f that covers the substantial entirety of the front surface of the casing main body 23. The front panel 24f is a panel assembly that aggregates two seamless panels 253, 254, and comprises the first panel 253 and the second panel 254.
The first panel 253 is disposed at the lower part of the front surface of the casing main body 23. The first panel 253 is supported capable of being moved by a moving mechanism (not shown) parallel to the vertical direction, and opens and closes the outlet 26. The first panel 253 is a seamless, rectangular plate shaped member, and has a width substantially the same as the width W (refer to FIG. 2(a)) of the casing main body 23 in a front view. In a state wherein the outlet 26 is closed, the first panel 253 is in a state parallel to the vertical direction, as depicted in FIG. 14(a). In addition, in this state, the first panel 253 has a projection area larger than the outlet 26 in a front view. Accordingly, in a state wherein the outlet 26 is closed, the first panel 253 completely covers the lower part of the front surface of the casing main body 23 including the outlet 26.
The second panel 254 is disposed at the upper part of the front surface of the casing main body 23. The second panel 254 is movably supported by a moving mechanism 255, and opens and closes the first inlet 27. Furthermore, the moving mechanism 255 supports the end portions on both sides of the second panel 254. The second panel 254 is a seamless, rectangular plate shaped member, and has a width substantially the same as the width W (refer to FIG. 2(a)) of the casing main body 23, including the first inlet 27 in a front view. In a state wherein the first inlet 27 is closed, the second panel 254 is in a state parallel to the vertical direction, as depicted in FIG. 14(a). In addition, the second panel 254 has a projection area larger than the first inlet 27 in a front view. Accordingly, in a state wherein the first inlet 27 is closed, the second panel 254 completely covers the upper half of the front surface of the casing main body 23, including the first inlet 27.
Thus, in a state wherein the outlet 26 is closed, the first panel 253 completely covers the lower part of the front surface of the casing main body 23, including the outlet 26; and in a state wherein the first inlet 27 is closed, the second panel 254 completely covers the upper part of the front surface of the casing main body 23, including the first inlet 27. In addition, the first panel 253 and the second panel 254 are arrayed vertically, and are disposed so that they constitute a substantially flat, rectangular flat surface in a state wherein the outlet 26 and the first inlet 27 are closed. The front panel 24f comprising the first panel 253 and the second panel 254 covers the substantial entirety of the front surface of the indoor unit 2f in a state wherein the outlet 26 and the first inlet 27 are closed, and only the seam formed by the boundary between the first panel 253 and the second panel 254 appears in a front view. Namely, with the front panel 24f, only the seam extending in the horizontal direction formed by the boundary between the first panel 253 and the second panel 254 appears in a front view, the same as the front panel 24a according to the first embodiment.
Other aspects of the constitution are the same as the indoor unit 2a according to the first embodiment.
<Operation of the Front Panel at the Start of Operation>
When the indoor unit 2f starts operation, the first panel 253 and the second panel 254 move, thereby opening the outlet 26 and the first inlet 27. The following explains the operation of the front panel 24f. 
In a state wherein the operation of the indoor unit 2f is stopped, the first panel 253 and the second panel 254 close the outlet 26 and the first inlet 27, and, as depicted in FIG. 14(a), the first panel 253 and the second panel 254 are arrayed substantially linearly, in a side view, parallel to the vertical direction. In addition, the surface of the first panel 253 and the second panel 254 is substantially flat.
When operation of the indoor unit 2f starts, the first panel 253 and the second panel 254 move, thereby opening the outlet 26 and the first inlet 27.
As depicted in FIG. 14(b), the second panel 254 moves frontward away from the first inlet 27, and rotates about an axis parallel to the lateral direction in a front view. The second panel 254 rotates about the vicinity of the lower end thereof as the center, so that its upper end is inclined frontward. The second panel 254, as depicted in FIG. 14(c), further moves, thereby forming a gap between the casing main body 23 and the second panel 254. Thereby, the first inlet 27 opens. Furthermore, air is sucked in from the gap between the upper end of the second panel 254 and the casing main body 23, and air is sucked in from the first inlet 27 into the casing main body 23. Furthermore, in a state wherein the first inlet 27 is open, the upper end of the second panel 254 is in a state inclined forward, and the upper end of the second panel 254 is in a state inclined rearward. In addition, in this state, the second panel 254 is disposed so that it does not interfere with the outlet 26. Namely, the lower end of the second panel 254 is positioned upward of the outlet 26, so that it does not become an obstacle to the blow out of air from the outlet 26.
The first panel 253 also moves linked to such movement of the second panel 254. As depicted in FIG. 14(b), the first panel 253 moves in parallel upward in the vertical direction, and opens the outlet 26. When the first panel 253 moves upward in the vertical direction, the upper end of the first panel 253 is inserted between the second panel 254, which has moved frontward, and the front surface of the casing main body 23. Namely, the upper end of the first panel 253 is inserted in the gap at the rear part of the second panel 254. When the first panel 253 moves further upward, the first panel 253 is housed in the gap between the second panel 254 and the casing main body 23, as shown in FIG. 14(c). Namely, the entirety or part of the first panel 253 enters a state wherein it is overlapped by the second panel 254. Furthermore, the first panel 253 moves in a state proximate to the front surface of the casing main body 23. From the viewpoint of preventing damage due to friction, it is preferable that the first panel 253 and the casing main body 23 do not make contact during the movement of the first panel 253, and it is further preferable that the first panel 253 and the casing main body 23 are spaced apart by approximately 1 mm or 2 mm.
In addition, when operation of the indoor unit 2f is stopped, the first panel 253 and the second panel 254 return to a flat state by moving in the reverse direction of that described above.
<Features>
The indoor unit 2f of this air conditioner 1 can also achieve the effect of enhancing aesthetics, the same as the indoor units 2a-2e according to the abovementioned embodiments.
In addition, the movement of the second panel 254 so that it is inclined makes it difficult to externally see the inner contents of the indoor unit 2f through the first inlet 27. Consequently, the aesthetics can be further enhanced.
Furthermore, when the outlet 26 opens, the first panel 253 approaches the casing main body 23, and it is consequently possible to suppress the leakage, from the gap between the first panel 253 and the casing main body 23, of the air blown out from the outlet 26, thereby suppressing the generation of a short circuit, wherein that air is sucked in once again from the first inlet 27. In addition, when the first panel 253 moves as well as when it is stopped, the proximity of the first panel 253 to the casing main body 23 makes it difficult to externally see the inner contents of the indoor unit 2f through the gap between the first panel 253 and the casing main body 23, and through the first inlet 27. Consequently, the aesthetics can be further enhanced.
Other Embodiments
1
With the indoor unit 2a according to the abovementioned first embodiment, the second panel 242 moves in parallel frontward, and the first panel 241 moves vertically upward. Further, part of the upper side of the first panel 241 is inserted between the second panel 242 and the casing main body 23. Thereby, the outlet 26 and the first inlet 27 open. However, the movement of the first panel 241 and the second panel 242 during operation is not limited thereto. For example, as described in <A>, <B>, and <C> below, the movement of the first panel 241 and the second panel 242 may open the outlet 26 and the first inlet 27.
<A>
As depicted in FIG. 9(a), the first panel 241 moves vertically upward, and the upper end of the first panel 241 moves rotatably about the lower end in a direction away from the casing main body 23. The movement of the first panel 241 vertically upward opens the outlet 26. In addition, attendant with the movement of the first panel 241, the second panel 242 also moves vertically upward, and the upper end of the second panel 242 moves rotatably about the lower end in a direction away from the casing main body 23. The rotational movement of the second panel 242 opens the first inlet 27. Finally, part of the upper side of the first panel 241 and part of the lower side of the second panel 242 enter an overlapped state, thereby opening the outlet 26 and the first inlet 27.
<B>
As depicted in FIG. 9(b), the upper end of the first panel 241 and the lower end of the second panel 242 are connected rotatable about the connection part 247. Further, the first panel 241 moves vertically upward, and its upper end rotates about its lower end in a direction away from the casing main body 23. The movement of the first panel 241 vertically upward opens the outlet 26. The second panel 242 moves in parallel frontward while maintaining an orientation parallel to the vertical direction, regardless of the rotational movement of the upper end of the first panel 241. The movement of the second panel 242 in parallel frontward opens the first inlet 27. Finally, the front panel 24a, which is in a state bent from the midpoint so that its upper end approaches the casing main body 23, enters a state in which it has moved upward, thereby opening the outlet 26 and the first inlet 27.
<C>
As depicted in FIG. 9(c), the upper end of the first panel 241 and the lower end of the second panel 242 are connected rotatable about the connection part 248. Furthermore, the first panel 241 moves vertically upward, and the upper end of the first panel 241 rotates about its lower end in a direction away from the casing main body 23. The movement of the first panel 241 vertically upward opens the outlet 26. Attendant with the rotational movement of the upper end of the first panel 241, the upper end of the second panel 242 moves rotatably about the lower end in a direction away from the casing main body 23. The rotational movement of the upper end of the second panel 242 opens the first inlet 27. Finally, the front panel 24a, which is in a state bent midway so that its upper end moves away from the casing main body 23, enters a state wherein it has moved upward, thereby opening the outlet 26 and the first inlet 27.
2
With the indoor unit 2b according to the abovementioned second embodiment, the front panel 24b moves vertically upward, and the upper end moves rotatably about the lower end in a direction away from the casing main body 23, but the movement of the front panel 24b is not limited thereto. For example, as shown in FIG. 10, the front panel 24b may move inclined in the forward upward direction in a state, as is, parallel to the vertical direction, thereby opening the outlet 26 and the first inlet 27.
3
With the indoor unit 2a according to the abovementioned first embodiment, the front panel 24a comprises the first panel 241 and the second panel 242, but may further comprise an additional plurality of panels. However, the smaller the number of the plurality of panels that constitutes the front panel 24a, the fewer the seams that will appear in the front panel 24a, and it is consequently preferable that the number of the plurality of panels that constitutes the front panel 24a is small. In addition, it is preferable that the plurality of panels that constitutes the front panel 24a is arrayed in the longitudinal direction. Thereby, seams extending in the longitudinal direction do not appear in a front view, thereby enhancing aesthetics.
INDUSTRIAL FIELD OF APPLICATION
The present invention achieves the effect of enabling a further reduction in the risk of impairing the aesthetics of a room, and is useful as the indoor unit of an air conditioner.

## Claims

1. An indoor unit of an air conditioner, comprising:
a casing having an outlet for passing air out into a room;
a front panel configured to cover said outlet as seen in a front surface view of said casing, and arranged to open and close said outlet,
said front panel having a projection area greater than said outlet as seen in said front surface view of said casing when said outlet is closed,
said casing further including a front surface and an inlet provided in said front surface for passing air taken in from the room; and
said front panel including
a first panel configured to open and close said outlet, said first panel having a projection area greater than said outlet as seen in said front surface view when said outlet is closed, and
a second panel configured to open and close said inlet, said second panel having a projection area greater than said inlet as seen in said front surface view when said inlet is closed.

2. The indoor unit as recited in claim 1, wherein
said front panel further includes a third panel disposed between said first panel and said second panel, said third panel having no seams as seen in said front surface view, and said first panel, said second panel, and said third panel being disposed to form a substantially fiat surface when said outlet and said inlet are closed.

3. The indoor unit as recited in claim 1, wherein
said front panel has a width substantially the same as a width of said casing as seen in said front surface view of said casing.

4. The indoor unit as recited in claim 3, wherein
said first panel does not have a seam, and has a width substantially the same as said width of said casing as seen in said front surface view, and
said second panel does not have a seam, and has a width substantially the same as said width of said casing as seen in said front surface view.

5. The indoor unit as recited in claim 3, wherein
said front panel further includes a third panel disposed between said first panel and said second panel, said third panel having no seams as seen in said front surface view, and
said first panel, said second panel, and said third panel are disposed to form a substantially flat surface when said outlet and said inlet are closed.

6. The indoor unit as recited in claim 5, wherein
said first panel is configured and arranged to move so that movement to a rear of said third panel pens said outlet.

7. The indoor unit as recited in claim 3, wherein
said second panel is configured and arranged to move so that said second panel is spaced apart from said inlet opens said inlet, and
said first panel is configured and arranged to move such that said first panel is between said casing and said second panel to open said outlet.

8. The indoor unit as recited in claim 7, wherein
said first panel and said second panel are arrayed vertically on said front surface of said casing, said first panel being disposed on a lower side and said second panel being disposed on an upper side, such that frontward movement of said second panel opens said inlet, and upward movement of said first panel to a rear of said second panel opens said outlet.

9. The indoor unit as recited in claim 8, wherein
said second panel is configured and arranged to enter a state where an upper end of said second panel is inclined frontward when said inlet is open.

10. The indoor unit as recited in claim 8, wherein
a lower end of said second panel is positioned upward of said outlet, which is positioned below said inlet, when said inlet is open.

11. The indoor unit as recited in claim 7, wherein
said first panel moves to a state when said first panel is proximate to said casing when said outlet opens.

12. An indoor unit of an air conditioner, comprising:
a casing having an outlet for passing air out into a room; and
a front panel configured to cover said outlet as seen in a front surface view of said casing, and arranged to open and close said outlet,
said front panel having a projection area greater than said outlet as seen in said front surface view of said casing when said outlet is closed,
said front panel having a width substantially the same as a width of said casing as seen in said front surface view of said casing,
said casing further including a front surface and an inlet provided in said front surface for passing air taken in from the room, and
said front panel being configured to open and close said outlet and said inlet, said front panel including a seamless member that covers said outlet and said inlet of said casing as seen in said front surface view when said outlet and said inlet are closed.

13. The indoor unit as recited in claim 12, wherein
said front panel has a width substantially the same as said width of said casing as seen in said front surface view.

14. An indoor unit of an air conditioner, comprising:
a casing having an outlet for passing air out into a room; and
a front panel configured to cover said outlet as seen in a front surface view of said casing, and arranged to open and close said outlet,
said front panel having a projection area greater than said outlet as seen in said front surface view of said casing when said outlet is closed,
said front panel having a width substantially the same as a width of said casing as seen in said front surface view of said casing,
said front panel not having a seam extending in the longitudinal direction in said front surface view, and
said front panel covering substantially an entirety of said front surface of said casing as seen in said front surface view when said outlet is closed.