Indoor unit of an air conditioner

1. An indoor unit of an air conditioner, comprising:

a cabinet including a suction inlet to communicate an inner portion on the indoor unit with an indoor space;

a front panel, disposed at a front side of the cabinet to communicate the inner portion with the indoor space,

wherein the front panel comprises:

a front panel body defining a discharge outlet;

a first front panel side extending rearward from a first edge of the front panel body;

a second front panel side extending rearward from a second edge of the front panel body;

a first front panel end bending toward the second front panel side forms a rear end of the first front panel side;

a second front panel end bending toward the first front panel side forms a rear end of the second front panel side, facing the first front panel end, and configured to provide an opening distance with the first front panel end; and

a door cover assembly movable along the front panel and comprising a door cover to open and close the discharge outlet;

wherein the door cover assembly further comprises:

a door cover housing disposed at a rear side of the door cover, and comprising a door cover accommodator to accommodate the door cover and a moving module installation portion;

a door cover moving module, disposed between the door cover housing and the door cover, installed to the moving module installation portion, and coupled to a rear side of the door cover, to move the door cover forward inserting the door cover into the discharge outlet or to move the door cover rearward to accommodate the door cover in the door cover accommodator;

a door housing moving module to move the door cover housing downward with the door cover and to move the door cover housing out of the discharge outlet, when the door cover is accommodated in the door cover accommodator; and

a panel module, disposed between the front panel body and the door cover housing, and assembled to each of the first front panel end and the second front panel end;

a left rack assembled to a left side of the panel module and right rack assembled to a right side of the panel module,

wherein the door cover housing is disposed between the left rack and the right rack and is vertically moved along the left rack and the right rack.

2. The indoor unit of the air conditioner of claim 1 ,

wherein the door housing moving module is configured to vertically move the door cover housing in a space formed by the front panel body, the first front panel side, and the second front panel side, and

wherein, when the discharge outlet is opened, the door cover moving module is configured to move the door cover rearward more than a thickness of the front panel body.

3. The indoor unit of the air conditioner of claim 1 , wherein, when the discharge outlet is closed, the door cover moving module is configured to move the door cover forward to insert the door cover into the discharge outlet and provide a continuous surface with a front surface of the front panel.

4. The indoor unit of the air conditioner of claim 1 , wherein the door cover moving module further comprises:

a door cover motor disposed at the rear side of the door cover, in the door cover housing, and including a door cover motor shaft disposed in a forward and rearward direction;

a sun gear coupled to the door cover motor shaft, disposed between the door cover and the door cover housing, and configured to rotate based on operation of the door cover motor;

a plurality of planetary gears engaged with the sun gear and radially disposed at an outer side of the sun gear; and

a cover guide rotatably disposed between the door cover housing and the door cover, engaged with each of the plurality of planetary gears, in which the plurality of planetary gears are disposed therein, and configured to be rotated clockwise or counterclockwise when the planetary gears are rotated to move the door cover forward or rearward.

5. The indoor unit of the air conditioner of claim 4 , wherein the door cover motor, the sun gear, and the plurality of planetary gears are each disposed in the cover guide.

6. The indoor unit of the air conditioner of claim 4 , wherein the cover guide comprises a guide gear engaged with each of the planetary gears on an inner circumferential surface thereof.

7. The indoor unit of the air conditioner of claim 4 ,

wherein the door cover further comprises:

an outer door cover inserted into the discharge outlet when the discharge outlet is closed and configured to provide a continuous surface with the front panel;

an inner door cover coupled to a rear surface of the outer door cover;

a mover disposed on the inner door cover and configured to transmit a driving force to move the inner door cover forward or rearward by the engagement with the cover guide; and

a core opening provided on the inner door cover and passing through the inner door cover in a forward and rearward direction,

wherein, when the discharge outlet is opened, the door cover motor, the sun gear, and the plurality of planetary gears are each disposed in the core opening.

8. The indoor unit of the air conditioner of claim 4 , wherein the moving module installation portion is concave rearward from the front, and disposed at a rear side of the door cover accommodator, and,

wherein the cover guide is disposed in the moving module installation portion.

9. The indoor unit of the air conditioner of claim 8 ,

wherein, the cover guide has a ring shape, comprises a guideway on an inner circumferential surface or an outer circumferential surface thereof, and the guideway extends in a circumferential direction of the cover guide and is disposed in the forward and rearward direction,

wherein the mover comprises a mover guide movably inserted into the guideway, and

wherein, when the cover guide is rotated, the mover guide interferes with the guideway and is moved along the guideway in the forward and rearward direction by the engagement.

10. The indoor unit of the air conditioner of claim 8 ,

wherein, the cover guide has a ring shape and comprises a guideway passing through an inner portion and an outer portion of the cover guide, the guideway extends in a circumferential direction of the cover guide, and is disposed in the forward and rearward direction,

wherein the mover comprises a mover guide movably inserted into the guideway, and

wherein, when the cover guide is rotated, the mover guide interferes with the guideway and is moved along the guideway in the forward and rearward direction by the engagement.

11. The indoor unit of the air conditioner of claim 10 ,

wherein the mover further comprises a mover body protruding rearward from the inner door cover and

wherein the mover guide protrudes inward or outward from the mover body and is inserted into the guideway of the cover guide.

12. The indoor unit of the air conditioner of claim 10 , wherein the mover has a ring shape, is disposed in the cover guide, and the mover guide radially protrudes outward from the mover body.

13. The indoor unit of the air conditioner of claim 10 , wherein the mover has a ring shape, is disposed in the mover, and the mover guide radially protrudes inward from the mover body.

14. The indoor unit of the air conditioner of claim 1 , wherein the door housing moving module further comprises:

a rack disposed in the front panel and comprising rack teeth extending in a vertical direction;

a gear assembly disposed in the door cover housing, engaged with the rack, and moving vertically along the rack; and

a gear drive motor disposed in the door cover housing and configured to provide a driving force to the gear assembly.

15. The indoor unit of the air conditioner of claim 14 ,

wherein the gear assembly comprises a plurality of gears, and

wherein at least one of the plurality of gears is a worm gear coupled to a motor shaft of the gear drive motor.

16. The indoor unit of the air conditioner of claim 1 ,

wherein the door housing moving module further comprises a left door housing moving module disposed at the left side of the door cover housing and a right door housing moving module disposed at the right side of the door cover housing,

wherein the left door housing moving module is disposed within a length of the first front panel side in a forward and rearward direction and the right door housing moving module is disposed within a length of the second front panel side in a forward and rearward direction.

17. The indoor unit of the air conditioner of claim 1 ,

wherein

the left rack disposed on the first front panel side and facing a left surface of the door cover housing; and

the right rack disposed on the second front panel side and facing a right surface of the door cover housing, and

wherein the rack teeth of the left rack face the rack teeth of the right rack.

18. The indoor unit of the air conditioner of claim 1 ,

the left rack disposed on the first front panel side and facing a left surface of the door cover housing; and

the right rack disposed on the second front panel side and facing a right surface of the door cover housing,

wherein the left rack is disposed between the front panel body and the first front panel end and the right rack is disposed between the front panel body and the second front panel end, and

wherein the rack teeth of the left rack face the rack teeth of the right rack.

19. The indoor unit of the air conditioner of claim 1 , further comprising:

an upper position sensor, disposed on the panel module, to detect an upper position of the door cover housing when the door cover housing is moved vertically, and

a lower position sensor, disposed on the panel module, to detect a lower position of the door cover housing when the door cover housing is moved vertically.