KR101443923B1 - Indoor unit of air-conditioner - Google Patents

Abstract

The present invention is characterized in that a plurality of centrifugal fan parts are located inside the air intake side and the discharge side and air discharged from the suction side centrifugal fan part is guided to the discharge side centrifugal fan part between the centrifugal fan parts and the air suction side surface is shielded The present invention relates to an indoor unit of an air conditioner in which a ventilation unit in which a guide vane is disposed is provided in a ventilation part for ventilation of an indoor space.

In the present invention, there is an advantage that the ventilation performance of the indoor unit can be improved.

Air conditioner, indoor unit, ventilation

Description

An indoor unit of an air conditioner (Indoor unit of air-conditioner)

The present invention relates to an indoor unit of an air conditioner.

Generally, an air conditioner is a device for cooling and heating a room by performing a refrigerant cycle comprising compression-condensation-expansion-evaporation.

The air conditioner includes an indoor unit for performing heat exchange between the refrigerant and the indoor air, and an outdoor unit for performing heat exchange between the refrigerant and the outdoor air. The indoor unit includes an indoor heat exchanger for exchanging heat between the refrigerant and the room air, a fan for blowing the indoor air, and a motor for rotating the fan. The outdoor unit includes an outdoor heat exchanger for exchanging heat between the refrigerant and outdoor air, a fan for blowing the outdoor air, a motor for rotating the fan, a compressor for compressing the refrigerant, an expansion unit for expanding the refrigerant, And a four-way valve for changing the flow direction of the refrigerant.

When performing indoor cooling, the indoor heat exchanger serves as an evaporating means and the outdoor heat exchanger serves as a condensing means. The indoor heat exchanger serves as the condensing means and the outdoor heat exchanger serves as the evaporating means. The switching of the cooling / heating operation is performed by changing the flow direction of the refrigerant by the four-way valve.

The present invention is to provide an indoor unit of an air conditioner having more indoor ventilation.

The present invention is intended to provide an indoor unit of an air conditioner capable of ventilating more indoor air.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the precise forms disclosed. Other objects, which will be apparent to those skilled in the art, It will be possible.

As described above, the indoor unit of the air conditioner according to the present invention includes: a main body having a suction port for sucking indoor air and a discharge port for discharging the sucked air; A heat exchanger provided in the main body for heat exchange between the indoor air and the refrigerant; A blowing fan provided inside the main body for the flow of the room air; And a ventilation unit provided in the main body for ventilation of indoor air, wherein the ventilation unit includes a fan housing having an intake port and an exhaust port; A suction-side centrifugal fan portion accommodated in the fan housing and sucking indoor air through the suction port; A discharge-side centrifugal fan portion accommodated in the fan housing, for discharging the air sucked into the inlet port to the exhaust port; And a guide vane for guiding the air that has passed through the suction-side centrifugal fan section to flow toward the discharge-side centrifugal fan section.

According to another aspect of the present invention, there is provided an air conditioner comprising: a main body having a first suction port for suctioning indoor air and a first discharge port for discharging the sucked air; A blowing fan provided inside the main body for the flow of the room air; A heat exchanger provided in the main body for heat exchange between the indoor air and the refrigerant; And a ventilation module detachably connected to the main body and having a ventilation unit therein, wherein the ventilation unit includes: a fan housing having an intake port and an exhaust port; A suction-side centrifugal fan portion accommodated in the fan housing and sucking indoor air through the suction port; A discharge-side centrifugal fan portion accommodated in the fan housing, for discharging the air sucked into the inlet port to the exhaust port; And a guide vane for guiding air that has passed through the suction-side centrifugal fan section to flow toward the discharge-side centrifugal fan section.

As described above, according to the indoor unit of the air conditioner of the present invention, indoor ventilation performance can be improved more smoothly. More specifically, when a pipe connected to the indoor unit for ventilation is elongated, the flow of air for ventilation is significantly disturbed by the flow resistance of the pipe. However, since the air for ventilation is forcedly forced by the two-stage fan, it can flow more smoothly than the conventional one. Therefore, there is an advantage that the indoor unit can be ventilated more smoothly by the indoor unit.

Further, the amount of air discharged from the room or from outside the room becomes larger. That is, there is an advantage that a larger amount of room air can be ventilated.

Hereinafter, an indoor unit of an air conditioner according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a partially cutaway perspective view of an indoor unit of an air conditioner according to the present invention, and FIG. 2 is a longitudinal sectional view taken along line A-A 'of an indoor unit of an air conditioner according to a first embodiment of the present invention. FIG. 3 is a sectional view showing a ventilation unit for ventilation included in the first embodiment in the indoor unit of the air conditioner according to the present invention, and FIG. 4 is a sectional view showing the operation state of the first embodiment in the indoor unit of the air conditioner according to the present invention. This is a perspective view.

1 and 2, the indoor unit of the air conditioner includes a main body 1, a heat exchanger provided inside the main body 1, and a heat exchanger provided under the heat exchanger for sucking and discharging indoor air A blowing fan, and a front panel 2 forming a front surface of the indoor unit.

The main body 1 is provided with a suction port 15 for sucking room air into the main body 1 and a discharge port 16 through which the sucked air is discharged into the room. The suction port 15 is formed on the upper surface of the main body 1 and the discharge port 16 is formed on the lower whole surface of the main body 1.

The front panel 2 is pivotally coupled to the front surface of the main body 1 so that the discharge port 16 can be selectively opened and closed. The front panel 2 is fixed to the main body 1 and has a discharge port 16 on the bottom surface of the main body 1 and a discharge port cover capable of shielding the discharge port 16, The discharge port 16 may be selectively opened and closed.

A ventilation unit 3 for discharging a part of room air sucked into the main body 1 to the outside is provided at one side of the main body 1. [ In the main body 1, the interior of the main body 1 is divided into a ventilation area 101 including the ventilation fan 13 and a ventilation area 102 including the ventilation unit 3 And is provided with a partitioning portion 19 for partitioning. An air flow hole 191 is formed at one side of the partition 19 so that a part of room air passing through the air flow area 101 flows into the ventilation area 102.

In detail, the ventilation unit 3 is provided with a suction port 15 for sucking air into the ventilation unit 3 and a discharge port 16 for discharging air to the outside of the ventilation unit 3. The suction port (15) of the ventilation unit (3) communicates with the air flow hole (191) of the partition (19). The discharge port (16) of the ventilation unit (3) is connected to the pipe (4) directed to the outdoors. At this time, the piping 4 may be arranged to pass through the rear portion 104 of the indoor unit and the wall 5 on which the indoor unit is installed, but the wall 5, through which the indoor unit is installed, As shown in FIG.

Hereinafter, the ventilation unit for ventilation included in the first embodiment in the indoor unit of the air conditioner according to the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIG. 3, the ventilation unit 3 includes a housing 30 for guiding the suction and discharge of air. The housing 30 may be integrally or plurally formed, and may have various shapes. Hereinafter, with reference to FIG. 3, the upper portion is referred to as an upper housing 310, the middle portion is referred to as an intermediate housing 320, and the lower portion is referred to as a lower housing 330.

In the upper housing 310, an air inlet 311 for sucking air is formed. An air flow hole 321 is formed in the center of the intermediate housing 320 between the intermediate housing 320 and the lower housing 330 to allow air to flow in and out. The lower housing 330 is provided with an exhaust port 331 through which air is discharged. Bell mouths 312 and 322 for guiding the flow of air may be formed around the air inlet 311 and the air flow hole 321, respectively.

A plurality of centrifugal fan parts 340 and 350 and a guide vane 360 are disposed in the housing 30. In detail, the centrifugal fans 340 and 350 are disposed on the air suction side and the discharge side of the housing 30, respectively. Each of the centrifugal fan units 340 and 350 has a configuration in which a plurality of blades are disposed along the circumferential direction on the hub. A ring-shaped shroud is disposed on the air intake side of the plurality of blades. The shroud corresponds to the perimeter of the bell mouth 312 of the upper housing.

The guide vanes 360 are disposed between the centrifugal fans 340 and 350. The guide vane 360 guides the air discharged from the suction side centrifugal fan part 340 to the discharge side centrifugal fan part 350. The guide vane 360 includes a vane hub 361 and a plurality of blades 364 arranged around the vane hub 361. A ring-shaped shroud 369 is coupled to the discharge side of the blade 364. The vane hub 361 is disk-shaped. The vane hub 361 shields the suction side surface of the air. The vane hub 361 prevents the air radiated in the suction side centrifugal fan part 340 from flowing back in the axial direction. A through hole 362 is formed in the center of the vane hub 361 so that the drive shaft 392 of the motor 391 can pass through. At this time, the diameter of the through hole 362 is formed to be larger than the outer diameter of the drive shaft 392. The length, number and angle of the blades 364 should be appropriately designed in consideration of the air flow rate and the wind speed of the ventilation unit 3.

At this time, although two centrifugal fans 340 and 350 are provided in this embodiment, three or more centrifugal fans 340 and 350 may be provided. In this case, guide vanes should be disposed between the centrifugal fans. A bell mouth may be disposed on the suction side of each of the centrifugal fan units.

The plurality of centrifugal fan parts 340 and 350 and the guide vane 360 are connected to the same drive shaft 392. In detail, the drive shaft 392 is rotatably coupled to the motor 391. The plurality of centrifugal fan units 340 and 350 are rotatably coupled to the drive shaft 392. The guide vane 360 is fixed to the housing 30 so as not to rotate.

The gap G2 between the periphery of the guide vane 360 and the housing 30 may be smaller than the gap G1 between the periphery of the suction side centrifugal fan part 340 and the housing 30 have. The circulation space of air formed around the guide vane 360 is formed to be relatively small so that the static pressure formed on the discharge side of the suction side centrifugal fan part 340 is prevented from being lost around the guide vane 360 .

The gap G2 between the periphery of the guide vane 360 and the housing 30 may be smaller than the gap G3 between the periphery of the discharge side centrifugal fan part 350 and the housing 30. [ The air circulation space around the discharge side centrifugal fan part 350 is formed to be relatively large so that the static pressure is kept constant in the circulation space.

In addition, the lower housing 330 is formed with a space enlargement portion 332 surrounding the outer periphery of the discharge side centrifugal fan portion 350. The space enlargement unit 332 increases the circulation space along the circumferential direction of the discharge side centrifugal fan unit 350. Accordingly, the air in the space expanding portion 332 circulates in the circumferential direction, and the static pressure is further increased by the centrifugal force. When the static pressure in the space expanding unit 332 is increased, the air flow rate is increased. In addition, the space expanding unit 332 minimizes the friction between the circumference of the discharge side centrifugal fan unit 350 and the circulating air to reduce the noise.

Hereinafter, the operation of the ventilation unit will be described in detail.

First, when the motor 391 rotates, the plurality of centrifugal fans 340 and 350 rotate together. At this time, the guide vane 360 is not rotated.

The suction-side centrifugal pan portion 340 sucks air in the axial direction through the suction port 311. At this time, the bell mouth 312 of the upper housing 310 minimizes the flow resistance when air is sucked.

The suctioned air is discharged in the radial direction as the suction side centrifugal fan part 340 is rotated. The pressure is primarily increased around the suction-side centrifugal pan part 340. [ The primarily pressurized air is circulated along the circumferential direction of the suction side centrifugal fan part 340. [

The pressurized air smoothly flows into the space between the periphery of the guide vane 360 and the housing 30. [ At this time, since the circumferential space of the guide vane 360 is reduced, the pressure of the air is hardly lost, and a relatively high static pressure can be maintained.

The guide vane 360 is not rotated, but is relatively rotated as the suction side centrifugal fan part 340 is rotated. Accordingly, the blade 364 of the guide vane 360 guides the pressurized air toward the shaft. In the process of guiding the air by the blade 463 of the guide vane 360, Remove the swirl component of the air. As such, the blade 463 of the guide vane 360 guides the air to converge to the center of the vane hub 361.

The air of the vane hub 361 is sucked into the discharge side centrifugal fan part 350. At this time, the bell mouth 322 of the intermediate housing 320 minimizes the flow resistance of the air sucked into the discharge side centrifugal fan part 350.

The air that has flowed into the vane hub 361 is sucked in the axial direction by the discharge side centrifugal fan part 350 and discharged in the radial direction. At this time, the discharged air circulates along the space expansive part 332 to have a higher static pressure. When the static pressure of the air is increased, the air volume of the ventilation unit 3 is further increased. The space enlargement unit 332 forms a sufficient space around the discharge-side centrifugal fan unit 350 to circulate the air, thereby minimizing the friction between the circumference of the discharge-side centrifugal fan unit 350 and the circulating air. As the friction is minimized, the noise is reduced.

The discharged air is discharged to the outside of the ventilation unit (3) through the exhaust port (331).

Hereinafter, the operation of the first embodiment in the indoor unit of the air conditioner according to the present invention will be described in detail with reference to the accompanying drawings.

2 to 4, when the indoor unit is operated, the blowing fan 13 and the ventilation unit 3 also operate. Then, the front panel 2 is pivoted, and the discharge port 16 formed on the entire lower side of the main body 1 is opened. The room air is sucked into the main body 1 through the suction port 15 formed on the upper side of the indoor unit body 1 by the blowing fan 13. [ The sucked air passes through the heat exchanger 11, exchanges heat with the refrigerant, and is cooled or heated. Then, the sucked air is discharged to the room through the discharge port 16 of the main body 1.

Part of the air that passes through the air blowing area 101 more accurately flows into the ventilation area 102 through the air flow holes 191 formed in the partition 19, do. More specifically, a part of the air passing through the air blowing area 101 flows through the air flow hole 191 of the partition 19 and the air inlet 15 of the ventilation unit 3, As shown in Fig. The air introduced into the ventilation unit 3 passes through the plurality of fans 340 and 350 and the guide vane 360 and flows into the piping 4 through the vent 331 of the ventilation unit 3 . The air flowing into the pipe 4 is discharged to the outside through the pipe 4.

That is, a part of the air sucked into the indoor unit body 1 is discharged to the outside, and the rest is discharged to the room. Therefore, according to the indoor unit, it is possible to ventilate simultaneously with the cooling and heating of the room.

Particularly, since the air discharged to the outside of the indoor air is forcedly flowed by the two centrifugal fan units 340 and 350 included in the ventilation unit 3, the air can be discharged in a larger amount of air and a faster wind speed than the conventional one . More specifically, as the length of the pipe 4 connected from the indoor unit to the outside is increased, the flow resistance of the air flowing in the pipe 4 is further increased. Considering the recent tendency of the piping 4 from the indoor unit to the outside to be long, the flow resistance inside the piping 4 is further increased. If a part of the room air is forced to flow outdoors with the ventilation unit 3 including the two centrifugal fan parts 340 and 350, a pressure difference sufficient to overcome the flow resistance inside the piping 4 . Therefore, indoor ventilation by the indoor unit can be smooth. Further, since the amount of room air to be ventilated is further increased, the ventilation performance can be further increased.

Also, according to the indoor unit, the ventilation performance can be improved in a state in which the thickness and height of the front and rear of the main body 1 are kept the same and the noise is minimized. More specifically, in order to increase the output of the conventional ventilation unit for discharging the room air outdoors, the size and rotation speed of the ventilation unit fan may be increased. At this time, when the size of the ventilation unit is increased, the front and rear thicknesses and heights of the indoor unit body 1 should also be increased. Further, when the rotational speed of the ventilation unit is increased, the noise generated by the rotation of the ventilation unit is further increased.

Meanwhile, in the indoor unit, the indoor air is discharged to the outside by the ventilation unit 3 including the two centrifugal fans 340 and 350. When the conventional ventilation unit 3 is replaced with the ventilation unit 3 including the two centrifugal fans 340 and 350, the lateral length of the indoor unit 1 may increase, The front and rear thickness and height of the indoor unit body 1 can be maintained in the same state. Even if the rotation speed of the motor included in the ventilation unit 3 is the same, the ventilation unit 3 including the two centrifugal fans 340 and 350 is provided, And a larger amount of air can be flowed. Therefore, it is possible to further improve the ventilation performance of the indoor unit in a state in which the thickness and height of the front and rear of the indoor unit body 1 are kept the same and the noise by the ventilation unit 3 is minimized.

Hereinafter, a second embodiment of the indoor unit of the air conditioner according to the present invention will be described in detail with reference to the accompanying drawings. The present embodiment differs from the first embodiment in that the structure of the ventilation area and the air flow between the ventilation area and the ventilation area are blocked.

5 is a cross-sectional view of the second embodiment of the indoor unit of the air conditioner according to the present invention.

Referring to FIG. 5, the ventilation area is provided with a regenerative heat exchanger 8 for exchanging heat between indoor air discharged to the outside and outdoor air flowing into the indoor space, and two ventilation openings Unit 3 is provided.

Specifically, the regeneration heat exchanger 8 includes two inlets for sucking indoor and outdoor air, respectively, and two outlets for discharging the sucked indoor and outdoor air, respectively. The first suction port communicates with the room through a ventilation hole (81) formed in the main body of the indoor unit, and the second suction port communicates with a pipe (42) directed to the outdoors so that outdoor air can be sucked. The first outlet port communicates with the inlet port of the ventilation unit 91 that discharges air toward the outside and the second outlet port communicates with the inlet port of the ventilation unit 92 that discharges air toward the inside of the room. do.

At this time, a flow path is formed in the regeneration heat exchanger 8 so that the indoor air sucked into the regenerative heat exchanger 8 can be discharged to the outside, so that the first suction port and the first discharge port communicate with each other. A flow path is formed in the regenerative heat pipe unit 8 so that the outdoor air sucked into the regeneration heat exchanger 8 can be discharged to the room, and the second suction port and the second discharge port are communicated with each other. At the same time, the flow path inside the regenerative heat exchanger (8) is formed so that the indoor and outdoor air sucked into the regenerative heat exchanger (8) can exchange heat with each other.

Of the two ventilation units 91 and 92, the discharge port 912 of the first ventilation unit 91 is connected to the outdoor heat exchanger 8 so as to discharge indoor air discharged from the regenerative heat exchanger 8 to the outside, And the discharge port 922 of the second ventilation unit 92 communicates with the room so as to supply outdoor air discharged from the regenerative heat exchanger 8 to the room. At this time, the discharge port 922 of the second ventilation unit 92 may be directly exposed to the room, or may communicate with the room through a pipe connecting the discharge port 922 and the room.

On the other hand, the partition 69 included in the indoor unit need not be provided with an air flow hole. This is because a suction port for sucking indoor air and a discharge port for discharging outdoor air to the room are formed on one side of the indoor unit body corresponding to the ventilation area. Therefore, the air flow between the ventilation area and the ventilation area is blocked by the partition.

Hereinafter, the operation of the present embodiment will be described in detail.

First, when the indoor unit is operated, the two ventilation units 91 and 92 are also operated. By operating the ventilation units 91 and 92, indoor and outdoor air is sucked into the interior of the indoor unit.

More specifically, by operating the first ventilation unit 91 of the two ventilation units 91 and 92, indoor air is sucked into the ventilation area through the ventilation opening 81. Then, the sucked air flows into the regeneration heat exchanger (8).

Also, by the operation of the second ventilation unit 92, outdoor air is sucked into the ventilation area through the piping 42 connected to the second suction port of the regeneration heat exchanger 8. The sucked air flows into the regenerative heat exchanger (8).

The indoor and outdoor air introduced into the regeneration heat exchanger (8) is heat-exchanged with each other in the process of passing through the flow path formed inside the regeneration heat exchanger (8). That is, when the indoor unit operates in the cooling mode, the outdoor air is cooled by the indoor air. When the indoor unit operates in the heating mode, the outdoor air is heated by the indoor air.

The indoor and outdoor air flowing inside the regeneration heat exchanger (80) flows to the two ventilation units (91, 92) via the first discharge port and the second discharge port of the regeneration heat exchanger (8), respectively. The indoor air having passed through the first ventilation unit 91 is discharged to the outside through a pipe 41 connecting the discharge port 912 of the first ventilation unit 91 and the outside. The outdoor air having passed through the second ventilation unit 92 is discharged to the room through the discharge port 922 of the second ventilation unit 92.

According to the indoor unit, energy waste caused by ventilation of the room can be minimized. In detail, in order to ventilate the room, if the indoor air is directly discharged to the outside, the indoor air needs to be cooled or heated by the discharged indoor air. That is, the more indoor air is discharged to the outside, the more energy is required to cool or heat the fresh air flowing into the room. Meanwhile, in the indoor unit, outdoor air flowing into the room is cooled or heated by room air discharged to the outside of the room through the regenerative heat exchanger (8). Therefore, the energy for cooling or heating the outdoor air introduced into the room can be minimized.

Hereinafter, the third embodiment of the indoor unit of the air conditioner according to the present invention will be described in detail with reference to the accompanying drawings. The present embodiment differs from the first embodiment in that the main body is composed of a portion excluding the ventilation region, and the ventilation region is included in the ventilation module detachably connected to the main body.

6 is an exploded perspective view of an indoor unit of an air conditioner according to a third embodiment of the present invention.

Referring to FIG. 6, the indoor unit includes a main body 71 and a ventilation module 73 detachably connected to the main body 71. First, the main body 71 of the indoor unit is provided with a suction port 715 for sucking indoor air and a discharge port 716 for discharging the sucked air into the room. The main body 71 includes a heat exchanger (not shown) for heat exchange between the room air and the refrigerant, and a blowing fan 713 for forcedly flowing the room air.

An air flow hole 719 through which air can flow in is formed on one side of the main body 71. The air flow hole 719 is shielded by the shielding member 718. [ The shielding member 718 may be formed of a rubber material so as to be fitted to the air flow hole 719. The shielding member 718 may be formed of a metal material such that threads are formed on the outer circumferential surface of the shielding member 718 and the inner circumferential surface of the air flow hole 719 so as to be fixed and separated according to rotation have.

The ventilation module 73 is provided with a ventilation unit 733 for discharging a part of indoor air sucked into the main body 71, that is, the ventilation area, outdoors. The ventilating unit 733 is provided with a ventilating unit 733 and a ventilating unit 733. The ventilating unit 733 is connected to the ventilating unit 73 by a ventilating unit 733, A ball is formed. In the state that the ventilation module (73) is separated from the main body (71), a through hole of the ventilation module is shielded by the shielding member State. The piping may be arranged to pass through the rear surface of the indoor unit and the wall where the indoor unit is installed, but may be arranged along the wall through which the indoor unit is installed through the side surface of the indoor unit.

On one side of the ventilation module 73 corresponding to the air flow holes 719 of the main body 71 in a state where the main body 71 and the ventilation module 73 are coupled to each other, An air flow hole 735 is formed so that a part of the air passing through the ventilation module 73 can flow into the ventilation module 73. The air flow hole 735 of the ventilation module 73 is connected to the air inlet 734 of the ventilation unit 733. [ That is, the air flow holes 719 of the main body 71, the air flow holes 735 of the ventilation module 73, and the intake ports 15 of the ventilation unit 3 are overlapped with each other in the lateral direction .

It is also possible that a ventilation port for directly communicating with the intake port 734 of the ventilation unit 733 is formed at one side of the ventilation module 73 without air flow holes of the main body 71 and the ventilation module 73 have. In this case, air for ventilation, which flows by the ventilation unit 733, flows to the inside and the outside of the ventilation module 73 through the ventilation opening without passing through the inside of the main body 71.

One side of the main body 71 on which the air flow holes 719 and 735 are formed and one side surface of the ventilation module 73 are provided with a detachable part for coupling the main body 71 and the ventilation module 73 74 are provided. The detachable portion 74 includes a sliding portion 743 protruding in a longitudinal direction from one side of the ventilation module 73 and a sliding portion 743 extending in the front- And a sliding guide portion 741 formed on one side surface of the sliding guide portion 741.

Specifically, the sliding portion 743 has a shape in which the cross-sectional area increases in a direction in which the sliding portion 743 is projected. A protrusion 744 is formed on one side of the sliding portion 743. Next, the sliding guide portion 741 has a shape in which the cross-sectional area increases in a direction in which the sliding guide portion 741 is recessed to correspond to the sliding portion 743. A receiving groove 742 is formed at one side of the sliding guide portion 741 so as to correspond to the protrusion 744 in a state where the main body 71 and the ventilation module 73 are engaged.

The sliding portion 743 and the sliding guide portion 741 are formed to be shorter than the front and rear thicknesses of the indoor unit from the front surface of the main body 71 and the ventilation module 73. That is, the front end of the sliding portion 743 and the sliding guide portion 741 are positioned at one side of the front surface of the main body 71 and the ventilation module 73, And is positioned at a position spaced apart from the rear by a predetermined distance.

The front panel 72 is coupled to the front surface of the main body 71 so as to be detachable from the main body 71. In addition, the front panel 72 is provided as two removable (721, 722) selectively detachable as required. One of the two front panels 721 and 722 may shield only the front face of the main body 71 and the other one 722 may be provided with the main body 71 and the ventilation module 73 So that it can be shielded.

Hereinafter, the operation of the present embodiment will be described in detail.

The indoor unit can perform the cooling and heating function only by the main body 71, and the ventilation function can be performed simultaneously when the ventilation module 73 is mounted. That is, the ventilation module 73 can be selectively used according to the needs of the user.

For example, when the user desires only the cooling / heating function of the room, only the main body 71 of the indoor unit can be installed. However, in this case, the air flow hole 719 of the main body 71 is kept shielded by the shielding member 718. [ A front panel 72 capable of shielding only the front surface of the main body 71 is coupled to the main body 71.

In addition, when the user desires the ventilation function together with the cooling and heating of the room, the ventilation module 73 may be used in a state where the ventilation module 73 is coupled to the main body 71 of the indoor unit. In detail, when the user wants the ventilation function together, the front panel 72 is detached from the main body 71, and the shielding member 718 for shielding the air flow hole 719 of the main body 71 is detached do.

Next, the ventilation module 73 is coupled to the side surface of the main body 71 so that the sliding portion 743 of the ventilation module 73 can be received in the sliding guide portion 741 of the main body 71 . At this time, since the sliding portion 743 has a shape in which the sectional area increases in the protruding direction, it can not be coupled to the sliding guide portion 741 in the lateral direction. The sliding portion 743 is positioned in front of the sliding guide portion 741 so that the sliding portion 743 and the sliding guide portion 741 can be overlapped in forward and backward directions, So that the sliding portion 743 can be received in the sliding guide portion 741.

At this time, the moving direction of the ventilation module 73 is guided by the interference between the sliding portion 743 and the sliding guide portion 741. The rear end 746 of the sliding part 743 is caught by the rear end 745 of the sliding guide part 741 so that the ventilation module 73 can be opened and closed in a state where the ventilation module 73 is properly positioned. Is prevented from moving further backward.

When the ventilation module 73 moves rearward and the rear end 746 of the sliding part 743 is positioned at the rear end 745 of the sliding guide part 741, (744) is received in the receiving groove (742) of the sliding guide portion (741). At this time, the projection 744 is caught by the receiving groove 742, so that the ventilation module 73 is not easily separated from the main body 71 by an external force not intended by the user.

Lastly, a front panel 722 capable of shielding both the front surface of the main body 71 and the front surface of the ventilation module 73 is attached to the main body 71 and the ventilation module.

In addition, the process of separating the ventilation module 73 from the main body 71 may be performed in the order reverse to the coupling process. That is, both the front surface of the main body 71 and the front surface of the ventilation module 73 The air flow hole 719 of the main body 71 is shielded after the front panel 722 shielding is removed and the ventilation module 73 is moved forward and separated from the main body 71. Finally, And a front panel 721 for covering the front surface of the main body 71 is assembled.

According to the indoor unit, the user can selectively remove the ventilation module 73 as needed. Accordingly, the user can selectively use the ventilation function of the indoor unit.

In addition, the operation of attaching and detaching the ventilation module 73 is simple.

It will be apparent to those skilled in the art that many other modifications and variations are possible in light of the above teachings and the scope of the present invention should be construed on the basis of the appended claims will be.

For example, in the first embodiment, the room is ventilated by discharging the room air outdoors, but the room may be ventilated by supplying outdoor air to the room. In this case, the air inlet 311 of the ventilation unit 3 is connected to the pipe 4 facing outdoors, and the air outlet 331 of the ventilation unit 3 is connected to the air flow holes 191 Lt; / RTI > The air inlet 311 or the air outlet 331 of the ventilation unit 3 may be directly exposed to the room without being connected to the air flow hole 191 or may be communicated with the room by piping. In addition, the piping 4 connecting the ventilation unit 3 and the outdoor can be connected through the side surface of the indoor unit.

1 is a partially cutaway perspective view of an indoor unit of an air conditioner according to a first embodiment of the present invention;

2 is a longitudinal sectional view taken along the line A-A 'of the first embodiment of the indoor unit of the air conditioner according to the present invention.

3 is a sectional view showing the ventilation unit for ventilation included in the first embodiment in the indoor unit of the air conditioner according to the present invention.

4 is a perspective view showing an operating state of the first embodiment of the indoor unit of the air conditioner according to the present invention.

5 is a cross-sectional view of the second embodiment of the indoor unit of the air conditioner according to the present invention.

6 is an exploded perspective view of a third embodiment of an indoor unit of an air conditioner according to the present invention.

Claims (10)

A main body having a suction port for sucking indoor air and a discharge port for discharging the sucked air; A heat exchanger provided in the main body for heat exchange between the indoor air and the refrigerant; A blowing fan provided inside the main body for the flow of the room air; And And a ventilation unit provided inside the main body for ventilation of indoor air, The ventilation unit includes: A fan housing having an intake port and an exhaust port; A suction-side centrifugal fan portion accommodated in the fan housing and sucking indoor air through the suction port; A discharge-side centrifugal fan portion accommodated in the fan housing, for discharging the air sucked into the inlet port to the exhaust port; And And a guide vane for guiding the air that has passed through the suction-side centrifugal fan section to flow toward the discharge-side centrifugal fan section. The method according to claim 1, Wherein the indoor air is discharged to the outside by the ventilation unit or the outdoor air flows into the room. 3. The method of claim 2, Inside the body, A blowing region in which the heat exchanger and the blowing fan are installed, And a ventilation area in which the ventilation unit is installed. The method of claim 3, Wherein the ventilating area and the ventilating area are separated from each other to block air flow. The method of claim 3, Wherein the ventilating area and the ventilating area communicate with each other such that air flowing in the ventilating area flows into the ventilating opening of the ventilating unit. The method according to claim 1, The ventilation unit may include a plurality of ventilation units for outdoor ventilation of indoor air and indoor ventilation of outdoor air, respectively, And a regenerative heat exchanger for exchanging heat between the indoor air discharged outdoors and the outdoor air drawn into the indoor space. The method according to claim 1, Wherein the two centrifugal fan units are rotated by a single motor. A main body having a suction port for sucking indoor air and a discharge port for discharging the sucked air; A blowing fan provided inside the main body for the flow of the room air; A heat exchanger provided in the main body for heat exchange between the indoor air and the refrigerant; And And a ventilation module detachably connected to the main body and having a ventilation unit therein, The ventilation unit includes: A fan housing having an intake port and an exhaust port; A suction-side centrifugal fan portion accommodated in the fan housing and sucking indoor air through the suction port; A discharge-side centrifugal fan portion accommodated in the fan housing, for discharging the air sucked into the inlet port to the exhaust port; And And a guide vane for guiding the air that has passed through the suction-side centrifugal fan section to flow toward the discharge-side centrifugal fan section. 9. The method of claim 8, Wherein an inside of the ventilation module and an inside of the main body communicate with each other. 9. The method of claim 8, Wherein the inside of the ventilation module and the inside of the main body are separated from each other to block the flow of air.

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