WO2002103249A2

WO2002103249A2 - Air conditioner

Info

Publication number: WO2002103249A2
Application number: PCT/KR2002/001149
Authority: WO
Inventors: Sung Jin Hwang
Original assignee: Lg Electronics Inc.
Priority date: 2001-06-20
Filing date: 2002-06-18
Publication date: 2002-12-27
Also published as: CN1392366A; KR20020096460A; WO2002103249A3; KR100452981B1; AU2002309317A1; CN1183361C; CN2580337Y

Abstract

Air conditioner including a main sash 100, forming an outer shape, having a suction part and a discharge part, a plurality of grill shutters 200 fitted in a horizontal direction in front of the suction part each to be movable up/down by a predetermined stroke for selective open/shut of the suction part, a driving part 240 for providing a reversible driving power to moving the grill shutters in up/down direction, and up/down moving members 230 coupled to the grill shutters, for receiving the driving power from a driving part, to cause up/down movement of the grill shutters as the up/down moving members move in up/down directions.

Description

AIR CONDITIONER

Technical Field

The present invention relates to an air conditioner, and more particularly, to an indoor unit of an air conditioner. Background Art

In general, the air conditioner circulates cooled, or heated air in a room for comfortable conditioning of a room air. In the air conditioners, there are an integrated type in which components of a cooling cycle are integrated in one unit, and a separated type in which components of a cooling cycle are assembled into two units. In the separated type air conditioner, there are a wall mounting type in which the indoor unit is mounted on a wall, a floor mounting type in which the indoor unit is installed on a floor, and a ceiling type in which the indoor unit is hung from a ceiling, or install on the ceiling.

Of the separated type air conditioner, the present invention relates to the indoor unit of the wall mounting type air conditioner. FIGS. 1 and 2 illustrate perspective view and section of indoor units of wall mounting type air conditioners, respectively.

Referring to FIG. 1, the related art indoor unit of a wall mounting type air conditioner is provided with a main sash 1 forming an outer shape, and mounted on a wall of a room, a front panel 3 fitted to a front face of the main sash 1, a suction grill 5a in the front panel 3, a discharge grill 7 fitted to a bottom of the front panel 3. There is a display part 9 between the suction grill 5a and the discharge grill 7 for displaying the present operation state or inducting user's operation.

In the meantime, there is a separate suction grill 5b in a top face of the main sash 1 for drawing room air.

Referring to FIG. 2, there is a heat exchanger 11 in rear of the front panel 3 for heat exchange of room air, and there is a blower 13 in rear of the heat exchanger 11 for forced circulation of room air. There are vane 17 and louver 15 in rear of the discharge grill 7 for regulating discharge direction of the heat exchanged air. The vane 17 regulates a discharge direction of the heat exchanged air in up and down directions, and the louver 15 regulates a discharge direction of the heat exchanged air in left and right directions.

The operation of the indoor unit will be explained, briefly.

The room air is drawn into the main sash 1 through the suction grill 5a, and 5b as the blower 13 is driven. Then, the room air is involved in heat exchange as the room air passes through the heat exchanger 11, and discharged through the discharge grill 7. The room air is discharged to a user' s desired direction by operating the vane 17 and louver 15.

However, the related art indoor unit of the wall mounting type air conditioner has the following problems.

First, the continuous opened state of the suction grills 5a and 5b, and the discharge grill 7 cause the air conditioner to fail in providing an elegant look on the whole .

Second, since the suction grills 5a and 5b are opened always, foreign matters, such as dusts, enter into inside of the indoor unit through the suction grills. Third, there has been a blind area right under the main sash 1 caused by a structure of the discharge grill 7, to which no heat exchanged air is supplied properly. Of course, though the discharge direction of the heat exchanged air can be regulated by using the vane 17 or the louver 15, the direct supply of the heat exchanged air right under the main sash 1 has been impossible. Disclosure of Invention An object of the present invention, designed for solving the foregoing problems, lies on providing an air conditioner having an elegant look.

Another object of the present invention is to provide an indoor unit of an air conditioner, which can prevent entrance of foreign matters.

Further object of the present invention is to provide an air conditioner, which can distribute heat exchanged air to a room uniformly.

In order to achieve the objects of the present invention, there is provided an air conditioner including a main sash, forming an outer shape, having a suction part and a discharge part, a plurality of grill shutters fitted in a horizontal direction in front of the suction part each to be movable up/down by a predetermined stroke for selective open/shut of the suction part, a driving part for providing a reversible driving power to moving the grill shutters in up/down direction, and up/down moving members coupled to the grill shutters, for receiving the driving power from a driving part, to cause up/down movement of the grill shutters as the up/down moving members move in up/down directions.

Some of the grill shutters move up, while rest of the grill shutters move down, for opening the suction part, in more detail, of the grill shutters, grill shutters in an upper part relatively move upward, and grill shutters in a lower part relatively move downward.

The grill shutters have up/down strokes different from one another depending on positions thereof. For this, the air conditioner further includes driving pins projected from one end at one side of each of the grill shutters, and a plurality of guide holes in the up/down moving members having up/down direction lengths different from one another according to matching grill shutters for inserting the driving pins. The guide holes have lengths inversely proportional to respective up/down strokes.

The grill shutter moves up and down after the grill shutter moves forward at an initial opening of the suction part.

For this, the air conditioner further includes a sloped part formed on the up/down moving member, a rack fitted to the sloped part, and a pinion coupled to the driving shaft of the driving part and engaged with the rack.

In another aspect of the present invention, there is provided an air conditioner including a main sash, forming an outer shape, having a suction part and a discharge part, a plurality of grill shutters fitted in a horizontal direction in front of the suction part each to be movable up/down by a predetermined stroke for selective open/shut of the suction part, a driving part for providing a reversible driving power to moving the grill shutters in up/down direction, up/down moving members coupled to the grill shutters, for receiving the driving power from the driving part, to cause up/down movement of the grill shutters as the up/down moving members move in up/down directions, and discharge means fitted to the main sash so as to be inserted in, or drawn out of the main sash, for discharging air into a room.

The discharge means includes a discharge housing fitted to be movable in up and down directions along the discharge part in the main sash, so that a part thereof can be drawn outside of the main sash through the discharge part in stages, an inlet in the discharge housing, and an outlet in the discharge housing to be drawn outside of the main sash when the discharge housing moves down.

The discharge means includes a discharge housing rotatably fitted in the vicinity of the discharge part of the main sash having a part for being drawn outside of the main sash through the discharge part depending on a direction of rotation, an inlet in the discharge housing, and an outlet drawn outside of the main sash when the discharge housing is rotated.

It is preferable that the discharge housing moves up/down, or rotates, automatically by the driving means. For this, the driving means includes a motor for receiving power to produce rotating power, a pinion coupled to a driving shaft of the motor, and a rack fitted to a sidewall of the discharge housing in up/down directions for engaging with the pinion. The driving means is a motor having a driving shaft coupled to a rotating shaft of the discharge housing.

According to the present invention, the suction part and the discharge part of the main sash are opened by the grill shutters and the discharge means during operation only. In this instance, the suction part, or the suction grill fitted to the suction part and the discharge part are hidden, to provide an elegant look. Moreover, infiltration of foreign matters into the indoor unit through the suction part and the discharge part can be prevented.

Moreover, as the discharge means drawable out of the main sash permits more unrestricted regulation of a discharge direction of the heat exchanged air, thereby minimizing a blind zone formed under the indoor unit in the related art.

Brief Description of Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention:

In the drawings: FIG. 1 illustrates a perspective view of a related art indoor unit of a wall mounting type air conditioner;

FIG. 2 illustrates a section of the indoor unit in FIG. 1;

FIG. 3 illustrates a perspective view of an indoor unit of an air conditioner in accordance with a preferred embodiment of the present invention;

FIG. 4 illustrates a perspective view of key parts of a shutter device in an air conditioner in accordance with a preferred embodiment of the present invention; FIG. 5 illustrates a section of key parts of one embodiment of discharge means in an air conditioner in accordance with a preferred embodiment of the present invention;

FIG. 6 illustrates a section of key parts of another embodiment of discharge means in an air conditioner in accordance with a preferred embodiment of the present invention; and,

FIG. 7 illustrates a perspective view showing a shutter device and discharge means in operation in an air conditioner of the present invention.

Best Mode for Carrying Out the Invention

Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. FIG. 3 illustrates a perspective view of an indoor unit of an air conditioner in accordance with a preferred embodiment of the present invention, and FIG. 4 illustrates a perspective view of key parts of a shutter device in an air conditioner in accordance with a preferred embodiment of the present invention.

Referring to FIG. 3, the indoor unit of an air conditioner includes a main sash 100 having a suction part and a discharge part, and a front panel 110 fitted to a front face of the main sash 100.

The main sash 100, substantially a thin hexahedral body, accommodates various components. That is, though not shown, the main sash 100 accommodates a heat exchanger for heat exchange of room air with a working fluid, and a blower for forced circulation of the room air toward the heat exchanger. The main sash 100 has suction part in a front and a top surfaces, and a discharge part in a bottom surface. The suction parts and the discharge part have are hidden by grill shutter 200 and a discharge housing 300 explained later.

The top suction part has a top suction grill 105 for smooth guide of room air.

The front panel 110 forms a front shape of the indoor unit, and has a curvature close to a planar surface. There is a separate suction grill (not shown) at a position of the front suction part of the main sash 100, opened/closed by a shutter device explained later.

In the meantime, there is a control panel 120 in a lower part of a side part of the front panel 110, having operation buttons, and a display part displaying an operation state.

In the meantime, there is the shutter device in front of the main sash 100 for selective open/shut of the front suction grill. The shutter device has a plurality of grill shutters 200 fitted in a horizontal direction in front of the front suction grill. The grill shutter 200 is a long plate member disposed in left and right direction to be movable in up and down direction for a predetermined stroke to open/close the front suction grill, selectively. That is, when the grill shutters 200 move in a direction to be spaced apart from adjacent ones, the front suction grill is opened, and opposite to this, when the grill shutters 200 move in a direction to come into contact with adjacent ones, the front suction grill is closed.

As an example, there are 8 grill shutters 200 in total shown in FIG. 3. For opening the front suction grill, all the grill shutters 200 may move up, or down. However, for more efficient opening of the front suction grill, it is preferable that some of the grill shutters 200 may move upward, while rest of the grill shutters 200 may move downward. For an example, for opening the front suction grill, upper four grill shutters 210 move upward, and, for closing the front suction grill, the upper four grill shutters 210 move downward. Opposite to this, for opening the front suction grill, the lower four grill shutters 210 move downward, and, for closing the front suction grill, the lower four grill shutters 210 move upward.

The operation principle of the grill shutter 200 will be explained, in detail. FIG. 4 only illustrates the four upper grill shutters 210 among the grill shutter in FIG. 3, as an example. Referring to FIG. 4, there is a motor 240 at one sides of the grill shutters 210 as a driving part for providing a driving power in regular/reverse direction to move the grill shutters 210 in up and down direction, and there is an up/down moving member 230 for receiving the driving power from the motor 240 and moving up/down the grill shutters 210. The up/down moving member 230, movably fitted between the front panel 110 and the main sash 100, causes the grill shutters 210 to move in up/down direction as the up/down moving member 230 itself moves.

For this, the grill shutter 210 has a fitting part 211 of a length at each end wherefrom a length of driving pin 213 is projected. The up/down moving member 230 has a plurality of guide holes 231 for inserting the driving pins 213. A number of the guide holes 231 are the same with a number of the grill shutter 210, and up/down direction lengths of the guide holes 231 vary with matching grill shutters 210, because an up/down stroke of the grill shutter 210 varies with a position of the grill shutter 210. That is, when the motor 240 is connected to a lower part of the up/down moving member 230, the up/down stroke of the grill shutter at the top is the longest, and the up/down stroke of the grill shutter at the bottom is the shortest. Meanwhile, the grill shutter 210 moves up when the driving pin 213 comes into contact with a lower circumferential surface of an inside of the guide hole 231, i.e., the up/down stroke of the grill shutter 210 is dependent on a length of the guide hole 231. That is, it is required that the shorter the up/down stroke of the grill shutter 210, the longer the length of the guide hole 231. In this instance, the guide holes 231 having lengths greater than a diameter of delay the up/down moving of the grill shutters 210, respectively. Thus, the lengths of the guide holes 231 are inversely proportional to the up/down strokes of the grill shutters 210.

Due to this reason, the guide hole at the top has the shortest guide hole length, substantially similar to a diameter of the driving pin 213, and the lengths of the guide holes become the longer as it goes down.

The fitting part 211 and the driving pin 213 may, or may not be provided at both ends of the grill shutter 210. In this instance, the up/down movement of the other end of the grill shutter 210 is guided by a separate guide member

(not shown) .

As a power transmission part for transmission of the driving power from the motor 240 to the up/down moving member 230, there are a rack 260 fitted to a back surface of the up/down moving member 230 in up/down direction, and a pinion 250 coupled to a driving shaft of the motor 240 and engaged with the rack 260. It is preferable that a driving gear 270 is fitted engaged with the pinion 250 between the motor 240 and the pinion 250. That is, the driving shaft 270 is coupled with the driving shaft of the motor 240, for transmission of the driving power from the motor 240 to the pinion 250.

In the meantime, of the grill shutters in FIG. 3, a structure for moving up/down the lower four grill shutters 220 is illustrated in FIG. 4. The lower grill shutters 220 have driving pins respectively, and an up/down moving member to be coupled with the driving pins. For convenience of explanation, one for moving up/down the upper four grill shutters 210 is called as an upper up/down moving member 230, and one for moving up/down the lower four grill shutters 220 is called as a lower up/down moving member (not shown) .

As the lower four grill shutters 220 move down when the front suction panel is opened, the lengths of the guide holes in the lower up/down moving member are opposite to the same in FIG. 4. That is, since the up/down stroke of the lowest grill shutter is the longest among -li¬

the lower four grill shutters 220, the length of the guide hole for the lowest grill shutter is the shortest.

In order to moving up/down the two up/down moving member by using one motor 240, it is required that the rack 260 is fitted to a lower part of the upper up/down moving member 230, and the rack 260 is fitted to an upper part of the lower up/down moving member.

In the meantime, it is preferable that the grill shutters 200 move up/down after the grill shutters 200 moves forward a distance from the main sash 100 at an initial stage of opening of the front suction grill, for moving up/down without interference from the main sash 100 or the front panel 110. To this end, the up/down moving member has a sloped part with a slope the rack is fitted thereto.

As an example, referring to FIG. 4, the upper up/down moving member 230 has a sloped part 233 on a back surface sloped forward as it goes down, to which the rack 260 is fitted to the back surface of the upper up/down moving member 230 inclusive of the sloped part 233. In this instance, when the pinion 250 is rotated by the driving power of the motor 240, the upper up/down moving member 230 moves up while the upper up/down moving member 230 moves forward gradually until the pinion 250 passes the sloped part 233.

In the meantime, there is discharge means for discharging air into a room while moving in/out of the main sash 100 through the discharge part in the main sash 100. FIG. 5 illustrates a section of key parts of one embodiment of discharge means in an air conditioner in accordance with a preferred embodiment of the present invention, showing the neighborhood of the discharge part in the main sash. Referring to FIG. 5, the discharge means moves up and down through the bottom surface of the main sash 100 for opening/closing the discharge part 103, selectively. To do this, there is a discharge housing 300 in the main sash 100 for moving up and down along the discharge part 103. The discharge housing 300 has a part drawn out of the main sash 100 through the discharge part 103 depending on an extent of moving down of the discharge housing 300. The discharge housing 300 has an inlet 301 for entrance of the heat exchanged air, and an outlet 303 in communication with the room.

The discharge housing 300, a rectangular shape with a width greater than a depth, has the inlet 301 in a top part, and the outlet 303 in a lower part of a front part. Therefore, if the discharge housing 300 moves up into the main sash 100 completely, the outlet 103 is closed by the discharge housing 300, and if the discharge housing 300 moves down to some extent, to draw the outlet 303 to an outside of the main sash 100, the outlet 103 is opened. It is preferable that a member for regulating an air discharge direction is provided in the discharge housing 300. To do this, there are a vane 307 for regulating the air discharge direction in up and down directions, and a louver 309 for regulating the air discharge direction in left and right directions in the discharge housing 300. It is preferable that there is a suction grill 305 in the inlet 301 for smooth guidance of the air flow.

In the meantime, though the discharge housing 300 may be designed to move up and down by the user, it is preferable that the discharge housing 300 moves up and down automatically according to operation of the air conditioner. For this, there is driving means for moving up and down the discharge housing 300, automatically. The driving means includes a motor 311 for generating rotating force upon reception of power, a pinion 313 coupled to a driving shaft of the motor 311, and a rack 315 fitted in up and down directions to a rear wall of the discharge housing 300. Though it is shown that the driving means is fitted to rear of the discharge housing 300, it is preferable that the driving means is fitted to a side of the discharge housing 300.

In order to prevent the discharge housing 300 from being separated from the main sash 100 completely, there is a stopper 320 on a front wall of the discharge housing 300. When the discharge housing 300 moves down to some extent, the stopper 320 is caught at a lower part of the main sash 100, in which state the discharge housing 300 can move down, no more.

FIG. 6 illustrates a section of key parts of another embodiment of discharge means in an air conditioner in accordance with a preferred embodiment of the present invention. The discharge means selectively opens/closes the discharge part 103 as the discharge means rotates in a bottom of the main sash 100. For this, there is a discharge housing 400 in the bottom of the main sash 100 rotatably fitted so as to be drawable to an outside of the main sash 100 through the discharge part 103 having a rotation center in the vicinity of the discharge part 103. The discharge housing 400 has an inlet 401 for entrance of the heat exchanged air, and an outlet 403 in communication with the room. The discharge housing 400 has a fan shaped section, and includes the inlet 401 in a top surface, and the outlet 403 in a lower circumference. There is a rotation shaft 410 of the discharge housing 400 close to an apex. hen the discharge housing 400 rotates in a clockwise direction around the rotation shaft 410 until the discharge housing 400 is in the main sash 100 completely, the discharge part 103 is closed by the discharge housing 400. Opposite to this, when the discharge housing 400 rotates in a counter clockwise direction until the outlet 403 is drawn outside of main sash 100, the discharge part 103 is opened. That is, the inside space of the main sash 100 is made to be in communication with the room through the inlet 301 and the outlet 303.

In the discharge housing 400, there are a vane 407 for regulating up and down direction discharge of the heat exchanged air, and a louver 409 for regulating left and right direction discharge of the heat exchanged air. There is an inlet grill 405 in the inlet 401 for smooth air flow.

There is a stopper 420 on an upper circumference of the discharge housing 400 for limiting a rotation angle of the discharge housing 400. Therefore, when the discharge housing 400 is rotated to some extent, the stopper 420 is caught at a bottom surface of the main sash 100, in which state the discharge housing 400 can rotate no more.

Meanwhile, it is also preferable that the discharge housing 400 is rotated automatically according to operation of the air conditioner. For this, there is driving means for automatic rotation of the discharge housing 400 fitted to the front part.

The driving means is a motor 411 directly coupled to the rotating shaft 410 of the discharge housing 400 for generating a rotating force upon reception of power. The operation of the air conditioner of the present invention will be explained, in detail. FIG. 7 illustrates a perspective view showing a shutter device and discharge means in operation in an air conditioner of the present invention .

When operation is started, the shutter device opens the front suction grill, and the discharge means opens the discharge part, which will be explained, in detail. When the motor 210 is put into operation, a driving power of the motor 210 is transmitted to the up/down moving member through the driving gear 270, the pinion 250, and the rack 260. Then, while the upper up/down moving member 230 moves up, the lower up/down moving member moves down. As a result, the upper four grill shutters 210 move up after the upper four grill shutters 210 move forward slightly, and the lower four grill shutters 220 move up after the lower four grill shutters 220 move forward slightly. In this instance, the top grill shutter and the bottom grill shutter move on the same time with the movement of the up/down moving members, rest of the grill shutters move starting from ones closer to the top grill shutter and the bottom grill shutter, which is, as explained, caused by differences of guide hole 231 lengths. Consequently, there are gaps formed between the grill shutters 200, that open the front suction grill as shown in FIG. 7.

On the same time with this, when power is provided to the motor 311 or 411, the discharge housing 300 or 400 is drawn out of the main sash 100, of which process is as follows. Referring to FIG. 5, the driving power of the motor 311 is transmitted to the discharge housing 300 through the pinion 313 and the rack 315, resulting to move the discharge housing 300 down. And, referring to FIG. 6, the driving power of the motor 411 is transmitted to the rotating shaft 410, resulting to rotate the discharge housing 400 in a counter clockwise direction, according to which the discharge part 103 in the main sash 100 is opened as shown in FIG. 7.

Next, when power is provided to the blower, the room air is drawn toward the heat exchanger side through the front suction grill, and the top suction grill 105 by the blowing force of the blower. Then, the room air passes the heat exchanger and makes heat exchange with a working fluid, and, in continuation, flows to the discharge housing 300, or 400 through the inlet 301, or 401.

Then, the heat exchanged air is discharged into the room through the outlet 303, or 403 guided by the vane 307, or 407 and the louver 309, or 409. Since the discharge housing 300, or 400 is drawn down from the main sash 100, the heat exchanged air can be discharged more uniformly than in the related art. In this instance, of course, the blind area right under the related art indoor unit can be minimized.

In summary, according to the present invention, the suction part and the discharge part in the main sash 100 are closed by the shutter device and the discharge means, respectively. According to this, the suction part (including the suction grill) and the discharge part in the main sash 100 is hidden to outside, resulting that an entire outside look of the indoor unit is elegant.

The closure of the suction part and the discharged part prevents infiltration of foreign matter into the air conditioner during the air conditioner is not in operation.

According to the present invention, the discharge housing 300, or 400 made drawable from the main sash 100 permits more unrestricted regulation of a discharge direction of the heat exchanged air, thereby minimizing the blind zone occurred right under the related art indoor unit .

It will be apparent to those skilled in the art that various modifications and variations can be made in the air conditioner of the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents. Industrial Applicability

The present invention provides an air conditioner with an elegant look.

The present invention provides an air conditioner which can minimize entrance of various foreign matters from the room into the air conditioner.

Finally, the present invention provides an air conditioner which permits more unrestricted regulation of a discharge direction of the heat exchanged air, thereby minimizing a blind area.

Claims

1. An air conditioner comprising: a main sash, forming an outer shape, having a suction part and a discharge part; a plurality of grill shutters fitted in a horizontal direction in front of the suction part each to be movable up/down by a predetermined stroke for selective open/shut of the suction part; a driving part for providing a reversible driving power to moving the grill shutters in up/down direction; and up/down moving members coupled to the grill shutters, for receiving the driving power from a driving part, to cause up/down movement of the grill shutters as the up/down moving members move in up/down directions.

2. An air conditioner comprising: a main sash, forming an outer shape, having a suction part and a discharge part; a plurality of grill shutters fitted in a horizontal direction in front of the suction part each to be movable up/down by a predetermined stroke for selective open/shut of the suction part; a driving part for providing a reversible driving power to moving the grill shutters in up/down direction; up/down moving members coupled to the grill shutters, for receiving the driving power from the driving part, to cause up/down movement of the grill shutters as the up/down moving members move in up/down directions; and discharge means fitted to the main sash so as to be inserted in, or drawn out of the main sash, for discharging air into a room.

3. An air conditioner as claimed in claim 1 or 2, wherein some of the grill shutters move up, while rest of the grill shutters move down, for opening the suction part.

4. An air conditioner as claimed in claim 3, wherein, of the grill shutters, grill shutters in an upper part relatively move upward, and grill shutters in a lower part relatively move downward.

5. An air conditioner as claimed in claim 1 or 2, wherein the grill shutters have up/down strokes different from one another depending on positions thereof.

6. An air conditioner as claimed in claim 5, further comprising driving pins projected from one end at one side of each of the grill shutters, and a plurality of guide holes in the up/down moving members having up/down direction lengths different from one another according to matching grill shutters for inserting the driving pins.

7. An air conditioner as claimed in claim 6, wherein the guide holes have lengths inversely proportional to respective up/down strokes.

8. An air conditioner as claimed in claim 1 or 2, further comprising a power transmission part between the driving part and the up/down moving part for transmission of the driving power from the driving part to the up/down moving part .

9. An air conditioner as claimed in claim 8, wherein the power transmission part includes; a rack formed in up/down direction on the up/down moving member, and a pinion coupled to a driving shaft of the driving part and engaged with the rack.

10. An air conditioner as claimed in claim 1 or 2, wherein the grill shutter moves up and down after the grill shutter moves forward at an initial opening of the suction part .

11. An air conditioner as claimed in claim 10, further comprising: a sloped part formed on the up/down moving member, a rack fitted to the sloped part, and a pinion coupled to the driving shaft of the driving part and engaged with the rack.

12. An air conditioner as claimed in claim 2, wherein the discharge means includes a discharge housing fitted to be movable in up and down directions along the discharge part in the main sash, so that a part thereof can be drawn outside of the main sash through the discharge part in stages .

13. An air conditioner as claimed in claim 12, wherein the discharge means further includes; an inlet in the discharge housing for entrance of the heat exchanged air into the discharge housing, and an outlet in the discharge housing formed in a part to be drawn outside of the main sash when the discharge housing moves down.

14. An air conditioner as claimed in claim 13, wherein the discharge housing is rectangular.

15. An air conditioner as claimed in claim 14, wherein the outlet is formed in a front surface of the discharge housing.

16. An air conditioner as claimed in claim 14, wherein the discharge means further includes a stopper fitted to a side wall of the discharge housing for being caught at the main sash when the discharge housing moves down to prevention the discharge housing from being fallen off the main sash.

17. An air conditioner as claimed in claim 13, wherein the discharge means further includes an inlet grill fitted to the inlet side.

18. An air conditioner as claimed in claim 12, wherein the discharge means further includes; a vane fitted to an inside of the discharge housing for regulating a discharge direction of the room air in up and down directions, and a louver fitted to an inside of the discharge housing for regulating the discharge direction of the room air in left and right directions.

19. An air conditioner as claimed in claim 12, wherein the discharge means further includes driving means for automatic moving up and down of the discharge housing.

20. An air conditioner as claimed in claim 19, wherein the driving means includes; a motor for generating rotating force upon reception of power, a pinion coupled to a driving shaft of the motor, and a rack fitted in up and down directions to a rear wall of the discharge housing.

21. An air conditioner as claimed in claim 2, wherein the discharge means includes a discharge housing rotatable around a rotating shaft in the vicinity of the discharge part in the main sash having a part drawable to an outside of the main sash through the discharge part depending on a direction of the rotation.

22. An air conditioner as claimed in claim 21, wherein the discharge means includes; an inlet in the discharge housing for entrance of the heat exchanged air into the discharge housing, and an outlet in the discharge housing formed in a part of the discharge housing drawn to outside of the main sash when the discharge housing is rotated.

23. An air conditioner as claimed in claim 22, wherein the discharge housing has a fan shaped section.

24. An air conditioner as claimed in claim 23, wherein the outlet is formed in a circumference of the discharge housing.

25. An air conditioner as claimed in claim 23, wherein the discharge means further includes a stopper fitted to a circumference of the discharge housing for being caught at the main sash to limit a rotation angle of the discharge housing when the discharge housing is rotated.

26. An air conditioner as claimed in claim 22, wherein the discharge means further includes an inlet grill fitted to the inlet.

27. An air conditioner as claimed in claim 21, wherein the discharge means further includes; a vane fitted to an inside of the discharge housing for regulating a discharge direction of the room air in up and down directions, and a louver fitted to an inside of the discharge housing for regulating a discharge direction of the room air in left and right directions.

28. An air conditioner as claimed in claim 21, wherein the discharge means further includes driving means for automatic rotation of the discharge housing.

29. An air conditioner as claimed in claim 28, wherein the driving means is a motor connected to the rotation shaft of the discharge housing.