AU2018388381B2

AU2018388381B2 - Ceiling-type indoor unit of air conditioner

Info

Publication number: AU2018388381B2
Application number: AU2018388381A
Authority: AU
Inventors: Hyoungjune KIM
Original assignee: LG Electronics Inc
Current assignee: LG Electronics Inc
Priority date: 2017-12-21
Filing date: 2018-12-21
Publication date: 2022-06-16
Anticipated expiration: 2038-12-21
Also published as: CN111801529A; EP3730847A4; KR102454127B1; EP3730846A4; EP3730845A1; AU2018388327B2; CN111742178A; KR102278184B1; CN111801529B; AU2018388754A1; CN111742179B; CN111742179A; KR102187748B1; AU2018388327A1; KR102235273B1; KR20190075818A; KR20200144534A; EP3730845A4; EP3730847A1; KR20190075819A

Abstract

A ceiling-type indoor unit of an air conditioner according to the present invention allows a suction grill to remain in contact with a front body while being supported by wires, thereby allowing the suction grill to descend instantly upon the operation of an elevator, has four wire guiders support the respective wires, thereby distributing the weight of the suction grill, and has the space between a guider body and a block formed to be smaller than the diameter of each wire, thereby preventing the wire from escaping between the guider body and the block.

Description

CEILING-TYPE INDOOR UNIT OF AIR-CONDITIONER

[Technical Field]

[1] The present disclosure relates to an air-conditioner, and more particularly, to a

ceiling-type indoor unit in which an intake grille is automatically lowered and lifted.

[Background]

[2] In general, air-conditioners include a compressor, a condenser, an evaporator,

and an expander and supply cold air or warm air to a building or a room using an air

conditioning cycle.

[3] Air-conditioners are structurally classified as a separation type in which a

compressor is disposed outdoors and an integrated type in which a compressor is

integrally manufactured.

[4] In the separation type air-conditioner, an indoor heat exchanger is installed in

an indoor unit and an outdoor heat exchanger and a compressor are installed in an

outdoor unit and the two devices separated from each other are connected with a

refrigerant pipe.

[5] In the integrated type air-conditioner, an indoor heat exchanger, an outdoor

heat exchanger, and a compressor installed in one case. Integrated type air

conditioners include a window type air-conditioner installed directly by hanging a

device on a window and a duct type air-conditioner installed outside a room by

connecting an intake duct and a discharge duct.

[6] The separation type air-conditioners are generally classified depending on an

installation form of the indoor unit.

[7] An air-conditioner whose indoor unit is installed vertically in an indoor space is

called a stand-type air-conditioner, an air-conditioner whose indoor unit is installed on

a wall in a room is called a wall-mounted air-conditioner, and an air-conditioner whose indoor unit installed on a ceiling in a room is called a ceiling-type indoor unit.

[8] In the case of the ceiling-type indoor unit, the intake grille is arranged to face

a floor. A filter for filtering foreign matter in the indoor air may be disposed on the

intake grille and may be separated for cleaning. A user needs to periodically remove

the intake grille from the case to clean the filter.

[9] However, in the case of the ceiling-type indoor unit, since the intake grille is

disposed on the ceiling of the room, the user has to climb on a structure such as a

chair to separate the intake grille.

[10] It is desired to address or ameliorate one or more disadvantages or limitations

associated with the prior art, provide an air conditioner, or to at least provide the public

with a useful alternative.

[Related Art document]

[Patent document]

Korean Patent Registration No. 10-0679838 B1

[Summary]

[11] The present disclosure may provide a ceiling-type indoor unit of an air

conditioner in which the entire intake grille is lifted or lowered in an up-down direction.

[12] Furthermore, the present disclosure may provide a ceiling-type indoor unit of

an air-conditioner having a structure in which four wires are simultaneously wound or

unwound using two motors.

[13] Furthermore, the present disclosure may provide a ceiling-type indoor unit in

which an intake grille is prevented from falling when lifted or lowered.

[14] Furthermore, the present disclosure may provide a ceiling-type indoor unit of

an air-conditioner in which shaking is minimized when an intake grille is lifted or

lowered.

[15] Furthermore, the present disclosure may provide a ceiling-type indoor unit of

an air-conditioner in which separation of foreign matter attached to a filter is minimized

when an intake grille is lifted or lowered.

[16] Technical objects to be achieved by the present disclosure are not limited to

the aforementioned technical objects, and other technical objects not described above

may be evidently understood by a person having ordinary skill in the art to which the

present disclosure pertains from the following description.

[17] In the present disclosure, since an interval between a guider body and a block

is formed smaller than a diameter of a wire, the wire may be prevented from escaping

between the guider body and the block.

[18] In the present disclosure, the entire intake grille may be lifted or lowered in an

up-down direction by unwinding or unwinding a plurality of wires connected to the

intake grille by an elevator.

[19] In the present disclosure, since four wires support four places near the corners

of the intake grille, shaking of the intake grille during lifting or lowering of the intake

grille may be minimized.

[20] In the present disclosure, since one motor controls a pair of wires arranged on

one side of the intake grille, a height variation on one side of the intake grille may be

minimized.

[21] In the present disclosure, since four wires are supported by respective guiders

disposed in a case, shaking in the process of lifting or lowering the intake grille may be

minimized.

[22] In the present disclosure, since four wires support four places near the corners

of the intake grille, even if one wire is damaged, the other three wires may support the

intake grille, thereby preventing the intake grille from falling.

[23] In the present disclosure, since four wires are supported by respective guiders

disposed in the case, shaking of the intake grille may be suppressed and separation

of foreign matter attached to the filter may be minimized during a lowering operation of

the intake grille.

[24] According to a first aspect, the present disclosure may broadly provide an air

conditioner comprising: a case having an inlet and an outlet; an intake grille disposed

to be separated from the case, and the intake grille disposed to be movable up and

down with respect to the case; a first unit disposed at the case, and the first unit winding

or unwinding a wire which is connected to the intake grille; a wire guider disposed at

the case, and the wire guider supporting the wire which is extended from the first unit;

wherein the wire guider comprises: a block disposed at the case; and the block

comprising a guider installation wall which faces the wire passing through the wire

guider, a guider body rotatably coupled to the block, and the guider body having a

guider recess extending along a circumferential surface of the guider body; and a

guider shaft penetrating a center of the guider body, and the guider shaft coupled to

the block to be rotatable, wherein the wire passing through the wire guider is located

in the guider recess and passes between the guider body and the guider installation

wall, wherein a distance between the guider body and the guider installation wall is

smaller than a diameter of the wire, and the guider installation wall comprises a

separation preventing protrusion which protrudes towards the guider body.

[25] The block may comprise: a fixed block protruding toward the first unit; and an

assembled block is coupled to the fixed block, wherein the guider shaft may be

rotatably assembled to the assembled block.

[26] The guider shaft may be separable from the guider body.

[27] The assembled block may comprise: an assembled block body assembled with the fixed block and fixed to the fixed block; and a guider installation space located outside the assembled block body and the guider body may rotatably insertedto the guider installation space, wherein the guider shaft may intersect the guider installation space.

[28] The guider shaft may be located inside the guider installation space.

[29] The guider installation space may comprise: a first guider installation wall

formed at the assembled block body, and the first guider installation wall facing one

side of the guider; a third guider installation wall formed at the assembled block body,

and the third guider installation wall facing the other side of the guider; and a second

guider installation wall formed at the assembled block body, and the second guider

installation wall connecting the first guider installation wall and the third guider

installation wall, wherein an interval between the second guider installation wall and

the guider body may be smaller than the diameter of the wire.

[30] The air conditioner may further comprise: a separation preventing protrusion

located above the guider shaft and protruding toward the guider body from the second

guider installation wall, wherein an interval between the separation preventing

protrusion and the guider body may be smaller than the diameter of the wire.

[31] The separation preventing protrusion may engage with an outer surface of the

guider body when the guider moves in the vertical direction.

[32] The separation preventing protrusion may have an arc shape and may

surround an outer surface of the guider body.

[33] The air conditioner may further comprise: a guider shaft recess formed outside

the assembled block body, and the guider shaft may be rotatably inserted to the guider

shaft recess, wherein the guider shaft recess may be formed to be concave in a

downward direction from an upper surface of the assembled block body.

[34] The guider shaft recess may comprise: a first axial wall formed at the

assembled block body and extending in a longitudinal direction of the guider shaft; a

third axial wall formed at the assembled block body, extending in the longitudinal

direction of the guider shaft, and facing the first axial wall; a second axial wall formed

at the assembled block body, and connecting the first axial wall and the third axial wall;

and a second separation preventing protrusion disposed on at least one of the first

axial wall or the third axial wall, and may engage with an upper side of the guider shaft.

[35] The wire guider may comprise: a first wire guider through which a 1-1 wire

extending from the first unit passes; and a second wire guider through which a 1-2

wire extending from the first unit passes, the guider shaft of the first wire guider

and the guider shaft of the second wire guider may be arranged in a line.

[36] The wire guider may comprise a first wire guider through which a 1-1 wire

wire extending from the first unit passes, a second unit disposed at the case,

coupled to the intake grille through a 2-1 wire and a 2-2 wire, and lifting or lowering

the other side of the intake grille by simultaneously winding or unwinding the 2-1

wire and the 2-2 wire; a third wire guider disposed at the case, supporting the 2-1

wire, and located above the intake grille; and a fourth wire guider disposed at the

case, supporting the 2-2 wire, and located above the intake grille.

[37] The 1-1 wire and the 1-2 wire may be arranged in a line and the 2-1 wire and

the 2-2 wire may be arranged in a line in a bottom view, and the 1-1 wire, the 1-2 wire,

the 2-1 wire and the 2-2 wire are arranged in a parallel line.

[38] A second unit may wind or unwind the 2-1 wire and the 2-2 wire, and the first

wire guider and the second wire guider may be located within a height of the first unit,

and the third wire guider and the fourth wire guider may be located within a height of the second unit.

[39] The intake grille may comprise: a first wire fixing portion to which the 1-1 wire

is fixed; a second wire fixing portion to which the 1-2 wire is fixed; a third wire fixing

portion to which the 2-1 wire is fixed; and a fourth wire fixing portion to which the 2-2

wire is fixed, wherein the first wire fixing portion may be located below the first wire

guider, the second wire fixing portion may be located below the second wire guider,

the third wire fixing portion may be located below the third wire guider, and the fourth

wire fixing portion may be located below the fourth wire guider.

[40] The first wire guider, the second wire guider, and the first unit may be located

in line, and the third wire guider, the fourth wire guider, and the second unit may be

located in a line.

[41] The first wire guider, the second wire guider, the third wire guider, and the

fourth wire guider may be located at the same height.

[42] A bottom surface of the case may have a square shape, the bottom surface

may form four corners, the first wire guider may be disposed at one of two corners

disposed on one side, the second wire guider may be disposed on the other of the two

corners disposed on one side, the third wire guider may be disposed on one of the two

corners disposed on the other side, and the fourth wire guider may be disposed on the

other of the two corners disposed on the other side.

[43] The air conditioner may further comprise a second unit winding and unwinding

the 2-1 wire and the 2-2 wire, wherein the case may comprise: a case housing installed

to hang on a ceiling of a room and having an open bottom surface; and a front body

covering the bottom surface of the case housing and including the inlet and the outlet,

the first unit and the second unit may be disposed in the case housing, the first wire

guider, the second wire guider, the third wire guider, and the fourth wire guider may be disposed on the front body, and the intake grille may be disposed on a lower side with respect to the front body.

[44] The ceiling-type indoor unit of an air-conditioner according to the embodiment

of the present disclosure has one or more advantages as follows.

[45] First, in the present disclosure, the elevator may automatically lift or lower the

intake grille by simultaneously winding or unwinding four wires coupled to the intake

grille.

[46] Second, since four points of the intake grille are supported through four wires,

the intake grille may be stably lifted or lowered.

[47] Third, in the present disclosure, since the intake grille is maintained in close

contact with the front body in a state of being supported by four wires, the intake grille

may be lowered immediately when the elevator operates.

[48] Fourth, in the present disclosure, since four wire guiders support the wires,

respectively, a load of the intake grille may be distributed and a load applied to the

elevator may be minimized.

[49] Fifth, according to the present disclosure, since each wire is maintained in a

state of being inserted in the wire recess of the wire guider, the wire is prevented from

escaping from the guider.

[50] Sixth, in the present disclosure, since an interval between the guide body and

the block is formed smaller than the diameter of the wire, the wire is prevented from

escaping between the guide body and the block.

[51] Seventh, in the present disclosure, since each wire guider is located above the

wire fixing portion, shaking of the intake grille in the process of winding or unwinding

each wire may be minimized.

[52] Eighth, in the present disclosure, since the guider is pressed by the assembled block due to a load applied to the wire, the guide is prevented from being separated from the assembled block although the guider is rotated due to movement of the wire.

[53] Ninth, in the present disclosure, since the separation preventing protrusion

provided at the assembled block is formed to surround the outer surface of the guider,

the wire is prevented from escaping between the guider body and the assembled block.

[54] Tenth, in the present disclosure, since the separation preventing protrusion

formed at the assembled block is disposed to be higher than the guider and protrudes

toward the guider body, the guider is prevented from escaping the guider installation

space.

[55] The term "comprising" as used in the specification and claims means

"consisting at least in part of." When interpreting each statement in this specification

that includes the term "comprising," features other than that or those prefaced by the

term may also be present. Related terms "comprise" and "comprises" are to be

interpreted in the same manner.

[56] The reference in this specification to any prior publication (or information

derived from it), or to any matter which is known, is not, and should not be taken as,

an acknowledgement or admission or any form of suggestion that that prior publication

(or information derived from it) or known matter forms part of the common general

knowledge in the field of endeavour to which this specification relates.

[Brief Description of the Drawings]

[57] FIG. 1 is a perspective view of an indoor unit of an air-conditioner according to

an embodiment of the present disclosure.

[58] FIG. 2 is an exemplary view of an operation of FIG. 1.

[59] FIG. 3 is a cross-sectional view of FIG. 1.

[60] FIG. 4 is an exploded perspective view of a front panel of FIG. 1.

[61] FIG. 5 is a plan view showing an arrangement of the front panel and an

elevator of FIG. 1.

[62] FIG. 6 is a bottom view of the front panel shown in FIG. 1.

[63] FIG. 7 is a bottom perspective view of an elevator of FIG. 2.

[64] FIG. 8 is a bottom view of the front panel and the elevator of FIG. 2.

[65] FIG. 9 is a perspective view showing an internal structure of the elevator of

FIG. 2.

[66] FIG. 10 is a plan view of FIG. 9.

[67] FIG. 11 is an exemplary view of an operation of an elevator according to a first

embodiment of the present disclosure.

[68] FIG. 12 is an exemplary view showing an installation structure of a wire

according to the first embodiment of the present disclosure.

[69] FIG. 13 is a bottom view of the front panel shown in FIG. 1.

[70] FIG. 14 is a plan view of an intake grille shown in FIG. 4.

[71] FIG. 15 is an exploded perspective view of a wire guider shown in FIG. 13.

[72] FIG. 16 is an exploded perspective view of the wire guider illustrated in FIG.

15 in another direction.

[73] FIG. 17 is a plan view of the wire guider shown in FIG. 13.

[74] FIG. 18 is a side cross-sectional view of the wire guider illustrated in FIG. 17.

[75] FIG. 19 is a perspective view illustrating an assembly structure of a guider

shaft shown in FIG. 17.

[Detailed description]

[58] Advantages and features of the present disclosure and implementation

methods thereof will be clarified through following embodiments described with

reference to the accompanying drawings. The present disclosure may, however, be embodied indifferent forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art. Further, the present disclosure is only defined by scopes of claims. Throughout the specification, the same reference numerals will be used to designate the same or like components.

[59] Hereinafter, the present disclosure will be described in detail with reference to

the accompanying drawings.

[60] FIG. 1 is a perspective view of an indoor unit of an air-conditioner according to

an embodiment of the present disclosure. FIG. 2 is an exemplary view of an operation

of FIG. 1. FIG. 3 is a cross-sectional view of FIG. 1. FIG. 4 is an exploded

perspective view of a front panel of FIG. 1. FIG. 5 is a plan view showing an

arrangement of the front panel and an elevator of FIG. 1. FIG. 6 is a bottom view of

the front panel shown in FIG. 1. FIG. 7 is a bottom perspective view of an elevator of

FIG. 2. FIG. 8 is a bottom view of the front panel and the elevator of FIG. 2. FIG. 9

is a perspective view showing an internal structure of the elevator of FIG. 2. FIG. 10

is a plan view of FIG. 9. FIG. 11 is an exemplary view of an operation of an elevator

according to a first embodiment of the present disclosure. FIG. 12 is an exemplary

view showing an installation structure of a wire according to the first embodiment of

the present disclosure. FIG. 13 is a bottom view of the front panel shown in FIG. 1.

FIG. 14 is a plan view of an intake grille shown in FIG. 4. FIG. 15 is an exploded

perspective view of a wire guider shown in FIG. 13. FIG. 16 is an exploded

perspective view of the wire guider illustrated in FIG. 15 in another direction. FIG. 17

is a plan view of the wire guider shown in FIG. 13. FIG. 18 is a side cross-sectional

view of the wire guider illustrated in FIG. 17. FIG. 19 is a perspective view illustrating an assembly structure of a guider shaft shown in FIG. 17.

[61] <Configuration of Indoor Unit>

[62] An indoor unit of an air-conditioner according to the present embodiment

includes a case 100 including an inlet 101 and an outlet 102, an indoor heat exchanger

130 disposed in the case 100, and an indoor blower fan 140 disposed in the case 100

and causing air to flow to the inlet 101 and the outlet 102.

[63] The case 100 further includes an intake grille 320 disposed to face a floor of a

room, and an elevator 500 lifting or lowering the intake grille 320 in a vertical direction

is disposed in the case 100.

[64] When a user's operation signal is received, the elevator 500 may be operated,

four wires 511, 512, 521, and 522 may be simultaneously unwound or wound by the

operation of the elevator 500, and the intake grille 320 coupled to the wires 511, 512,

521, and 522 may be moved in the vertical direction.

[65] A structure for lifting and lowering the intake grille 320 will be described in detail

under.

[66] <Configuration of Case>

[67] In this embodiment, the case 100 includes a case housing 110 and a front

panel 300. The case housing 100 is installed to hang on the ceiling of a room through

a hanger (not shown) and a lower side thereof is open. The front panel 300 covers

the open surface of the case housing 110, is disposed to face a floor of the room, is

exposed to the room, and has the inlet 101 and the outlet 102.

[68] The case 100 may be implemented in various ways depending on a production

form, and the configuration of the case 100 does not limit the spirit of the present

disclosure.

[69] The inlet 101 is disposed at the center of the front panel 300, and the outlet

102 is disposed outside the inlet 101. The number of the inlet 101 or the number of

the outlet 102 is irrelevant to the spirit of the present disclosure. In this embodiment,

one inlet 101 is provided and a plurality of outlets 102 are disposed.

[70] In the present embodiment, the inlet 101 has a square shape in a bottom view,

and four outlets 102 are provided and spaced apart from each edge of the inlet 101 by

a predetermined interval.

[71] <Configuration of Indoor Heat Exchanger>

[72] The indoor heat exchanger 130 is disposed between the inlet 101 and the

outlet 102 and partitions the case 100 into an inner side and an outer side. Theindoor

heat exchanger 130 is disposed vertically in this embodiment.

[73] An indoor blower fan 140 is located on an inner side of the indoor heat

exchanger130.

[74] In a top or bottom view, the indoor heat exchanger may have an overall shape

of "E", and some sections thereof may be separated.

[75] The indoor heat exchanger 130 is disposed such that air discharged from the

indoor blower fan 140 enters vertically.

[76] A drain pan 132 is installed in the case 100, and the indoor heat exchanger

130 is mounted on the drain pan 132. Condensate water generated in the indoor heat

exchanger 130 may flow to the drain pan 132 and be subsequently stored therein. A

drain pump (not shown) for discharging collected condensate water to the outside is

disposed in the drain pan 132.

[77] The drain pan 132 may have an inclined surface having directionality to collect

and store condensate water flowing from the indoor heat exchanger 130 to one side.

[78] <Configuration of Indoor Blower Fan>

[79] The indoor blower fan 140 is located in the case 100 and is disposed above the inlet 101. The indoor blower fan 140 is a centrifugal blower that intakes air to the center and discharges air in a circumferential direction.

[80] The indoor blower fan 140 includes a bell mouse 142, a fan 144, and a fan

motor 146.

[81] The bell mouse 142 is disposed above the intake grille 320 and located below

the fan 144. The bell mouse 142 guides air passing through the intake grille 320 to

the fan 144.

[82] The fan motor 146 rotates the fan 144. The fan motor 146 is fixed to the case

housing 110. The fan motor 146 is disposed above the fan 144. At least a portion

of the fan motor 146 is located higher than the fan 144.

[83] A motor shaft of the fan motor 146 is disposed to face a lower side, and the

fan 144 is coupled to the motor shaft.

[84] The indoor heat exchanger 130 is located outside the edge of the fan 144. At

least portions of the fan 144 and the indoor heat exchanger 130 are disposed on the

same horizontal line. At least a portion of the bell mouse 142 is inserted into the fan

144. At least a portion of the bell mouse 142 overlaps the fan 144 in the up-down

direction.

[85] <Configuration of Flow Path>

[86] The indoor heat exchanger 130 is disposed in the case housing 110 and

partitions an inner space of the case housing 110 into an inner side and an outer side.

[87] An inner space surrounded by the indoor heat exchanger 130 is defined as an

intake flow path 103, and an outer space of the indoor heat exchanger 130 is defined

as a discharge flow path 104.

[88] The indoor blower fan 140 is disposed at the intake flow path 103. The

discharge flow path 104 is between the outside of the indoor heat exchanger 130 and a side wall of the case housing 110.

[89] In a top view or a bottom view, the intake flow path 103 is an inner side

surrounded by "E"of the indoor heat exchanger, and the discharge flow path 104 is an

outer side surrounded by "E" of the indoor heat exchanger.

[90] The intake flow path 103 communicates with the inlet 101, and the discharge

flow path 104 communicates with the outlet 103.

[91] Air flows from a lower side to an upper side of the intake flow path 103 and

flows from an upper side to a lower side of the discharge flow path 104. A flow

direction of air is switched 180 degrees based on the indoor heat exchanger 130.

[92] The inlet 101 and the outlet 102 are provided on the same plane of the front

panel300.

[93] The inlet 101 and the outlet 102 are arranged to face in the same direction.

In this embodiment, the inlet 101 and the outlet 102 are arranged to face the floor of

the room.

[94] When the front panel 300 is curved, the outlet 102 may be formed to have a

slight side slope, but the outlet 102 connected to the discharge flow path 104 is

provided to face downward.

[95] A vane module 200 is disposed to control a direction of air discharged through

the outlet 102.

[96] <Configuration of Front Panel>

[97] The front panel 300 includes a front body 310 coupled to the case housing 110,

having the inlet 101 and the outlet 102, the intake grille 320 having a plurality of grille

holes 321 and covering the inlet 101, a pre-filter 330 detachably assembled to the

intake grille 320, and a vane module 200 installed at the front body 310 and controlling

an air flow direction of the outlet 102.

[98] The intake grille 320 is disposed separately from the front body 310. The

intake grille 320 is in close contact with the front body 310, but a component for

assembling or coupling the front body 310 and the intake grille 320 is not disposed.

[99] The intake grille 320 is pulled by a wire to maintain a close contact with the

front body 310 and may be lowered or lifted according to an operation of the elevator

500.

[100] The intake grille 320 maybe lifted or lowered in the up-down direction from the

front body 310 by the elevator 500. The intake grille 320 covers the entire inlet 101.

[101] The elevator 500 and the intake grille 320 are connected through four wires

and the elevator 500 moves the intake grille 320 in the up-down direction by winding

or unwinding the wires.

[102] In this embodiment, the intake grille 320 has a plurality of grille holes 321

through a grid shape. The grille hole 321 and the inlet 101 are in communication.

[103] The pre-filter 330 is disposed above the intake grille 320. The pre-filter 330

filters air intaken into the case 100. The pre-filter 330 is located above the grille hole

321 and filters air passing through the intake grille 320.

[104] The outlet 102 is provided in the form of a long slit along the edge of the inlet

101. The vane module 200 is located on the outlet 102 and coupled to the front body

310.

[105] In this embodiment, the vane module 200 may be separated to a lower side of

the front body 310. That is, the vane module 200 is disposed irrespective of a

coupling structure of the front body 310 and may be independently separated from the

front body 310. A structure thereof will be described later in more detail.

[106] <Configuration of Front Body>

[107] The front body 310 is coupled to the lower side of the case housing 110 and is arranged toward a direction of the room. The front body 310 is installed on the ceiling of the room and exposed to the room.

[108] The front body 310 is coupled to the case housing 110, and the case housing

110 supports a load of the front body 310. The front body 310 supports loads of the

intake grille 320 and the pre-filter 330.

[109] The front body 310 has a square shape in a top view. The front body 310

may have various forms.

[110] An upper surface of the front body 310 is formed horizontally to be in close

contact with the ceiling, and a lower surface thereof may have a slightly curved edge.

[111] The inlet 101 is disposed at the center of the front body 310, and a plurality of

outlets 102 are arranged outside the edge of the inlet 101.

[112] In a top view, the inlet 101 may have a square shape, and the outlet 102 may

have a rectangular shape. The outlet 102 may be formed in a slit shape in which a

length is greater than a width.

[113] The front body 310 includes a front frame 312, a side cover 314, and a corner

cover 316.

[114] The front frame 312 provides a load and rigidity of the front panel 300 and is

fastened to the case housing 110. The inlet 101 and four outlets 102 are provided in

the front frame 312.

[115] In this embodiment, the front frame 312 includes a side frame 311 and a corner

frame 313.

[116] The corner frame 313 is disposed at each corner of the front panel 300. The

side frame 311 is coupled with two corner frames 313. The side frame 311 includes

an inner side frame 311a and an outer side frame 311b.

[117] The inner side frame 311a is disposed between the inlet 101 and the outlet

102 and couples the two corner frames 313. The outer side frame 311b is disposed

outside the outlet 102.

[118] In this embodiment, four inner side frames 311a and four outer side frames

311b are provided.

[119] The inlet 101 is located on an inner side of the four inner side frames 311a.

The outlet 102 is surrounded by two corner frames 313, the inner side frames 311a,

and the outer side frames 311b.

[120] The side cover 314 and the corner cover 316 are coupled to a bottom surface

of the front frame 312. The side cover 314 and the corner cover 316 are exposed to

the user, and the front frame 312 is not visible to the user.

[121] The side cover 314 is disposed at the edge of the front frame 312, and the

corner cover 316 is disposed at the corner of the front frame 312.

[122] The side cover 314 is formed of a synthetic resin material and is fastened and

fixed to the front frame 312. Specifically, the side cover 314 is coupled to the side

frame 311 and the corner cover 316 is coupled to the corner frame 313.

[123] In this embodiment, four side covers 314 and four corner covers 316 are

provided. The side covers 314 and the corner covers 316 are coupled to the front

frame 312 and connected to one structure. In the front panel 300, four side covers

314 and four corner covers 316 form one edge.

[124] The side cover 314 is disposed below the side frame 311, and the corner cover

316 is disposed below the corner frame 313.

[125] The four side covers 314 and the four corner covers 316 are assembled to

forma quadrangular rim. The four connected side covers 314 and the four connected

corner covers 316 are defined as a front deco 350.

[126] The front deco 350 forms a deco outer border 351 and a deco inner border

352.

[127] In a top view or a bottom view, the deco outer border 351 has a square shape,

and the deco inner border 352 is also formed in a square shape overall. However,

the corner of the deco inner border has a predetermined curvature.

[128] The intake grille 320 and four vane modules 200 are arranged on an inner side

of the deco inner border 352. The intake grille 320 and four vane modules 200 are in

contact with the deco inner border 352.

[129] In this embodiment, four side covers 314 are arranged, and each side cover

314 is coupled to the front frame 312. An outer edge of the side cover 314 forms part

of the deco outer border 351, and an inner edge thereof forms part of the deco inner

border 352.

[130] In particular, the inner edge of the side cover 314 forms an outer boundary of

the outlet 102. The inner edge of the side cover 314 is defined as a side deco inner

border 315.

[131] In this embodiment, four corner covers 316 are arranged, and each corner

cover 316 is coupled to the front frame 312. The outer edge of the corner cover 316

forms part of the deco outer border 351, and the inner edge thereof forms part of the

deco inner border 352.

[132] The inner edge of the corner cover 316 is defined as a corner deco inner border

317.

[133] The corner deco inner border 317 may be disposed in contact with the intake

grille 320. In this embodiment, the inner edge of the corner cover 316 is disposed to

face the intake grille 320 and is spaced apart therefrom by a predetermined interval to

form a gap 317a.

[134] The side deco inner border 315 is also spaced apart from the vane module

200 by a predetermined interval to form a gap 315a and is disposed to face the outer

edge of the vane module 200.

[135] Therefore, the deco inner border 352 is spaced apart from the outer edge of

the intake grille 320 and four vane modules 200 by a predetermined interval and form

a continuous gap.

[136] A continuous gap formed by four side deco inner border gaps 315a and four

corner deco inner border gaps 317a is defined as a front deco gap 350a.

[137] The front deco gap 350a is formed on an inner edge of the front deco 350.

Specifically, the front deco gap 350a is formed by separating the outer edge of the

intake grille 320 and the vane module 200 and the inner edge of the front deco 350.

[138] When the vane module 200 is not operated (when the indoor unit is stopped),

the front deco gap 350a makes the intake grille 320 and the vane module 200 appear

as one structure.

[139] <Configuration of Intake Grille>

[140] The intake grille 320 is located below the front body 310. The intake grille

320 may be lowered downward while in close contact with the bottom surface of the

front body 310.

[141] The intake grille 320 includes a grille body 322, a plurality of grille holes 321

formed to penetrate the grille body 322 in the up-down direction, a wire fixing portion

329 provided at the grille body 322 and allowing the other end of the wire to be fixed

thereto, and a filter coupling portion 331 to which the pre-filter 330 is detachably

assembled.

[142] The intake grille 320 includes a grille body 322 disposed below the inlet 101,

communicating with the inlet 101 by a plurality of grille holes 321, having a square

shape and a grille corner portion 327 extending diagonally from a corner of the grille body 322.

[143] A bottom surface of the grille body 322 and a bottom surface of the vane 210

may form a continuous plane. In addition, the bottom surface of the grille body 322

and a bottom surface of the corner cover 316 may form a continuous plane.

[144] A plurality of grills 323 are arranged in a grid shape inside the grille body 322.

The grid-shaped grille 323 forms a rectangular grille hole 321. A portion where the

grille 323 and the grille hole 321 are formed is defined as an inlet portion.

[145] The grille body 322 includes a grille 323 in which a plurality of grille holes 321

are formed and a grille body portion 324 disposed along the edge of the grille 323 and

surrounding the grille 323. In the top view or the bottom view, the inlet portion is

formed in a rectangular shape overall.

[146] The pre-filter 330 is located above the inlet portion and covers the inlet portion.

[147] Each corner of the inlet portion is disposed to face each corner of the front

panel 300, and more specifically, to face the corner cover 316.

[148] In the bottom view, the grille body 322 is formed in a rectangular shape.

[149] An outer edge of the grille body portion 324 is disposed to face the outlet 102

or the front deco 350.

[150] The outer edge of the grille body portion 324 includes a grille corner border

326 disposed to face the corner cover 316 and a grille side border 325 forming the

outlet 102 and disposed to face the side cover 314.

[151] The grille corner border 326 may have a curvature centering on the inside of

the intake grille 320, and the grille side border 325 may have a curvature centering on

the outside of the intake grille 320.

[152] The grille body portion 324 further includes a grille corner portion 327

surrounded by the grille corner border 326 and two grille side borders 325. The grille corner portion 327 protrudes toward the corner cover 316 from the grille body portion

324.

[153] The grille corner portion 327 is disposed at each corner of the grille body 322.

The grille corner portion 327 extends toward each corner of the front panel 300.

[154] In this embodiment, four grille corner portions 327 are disposed. For

convenience of explanation, the four grille corner portions 327 are defined as a first

grille corner portion 327-1, a second grille corner portion 327-2, a third grille corner

portion 327-3, and a fourth grille corner portion 327-4.

[155] The grille side border 325 is formed to be concave inward from the outside.

[156] The outlet 102 is provided between the side cover 314 and the intake grille

320. More specifically, one outlet 102 is provided between the side deco inner border

315 of the side cover 314 and the grille side border 325 of the grille body 322. Each

outlet 102 is provided between the side deco inner border 315 and the grille side border

325 disposed in four directions of the intake grille 320.

[157] In this embodiment, the grille corner border 326 and the corner deco inner

border 317 are arranged to face each other. A length of the grille corner border 326

and a length of the corner deco inner border 317 are equal. That is, a width of the

corner cover 316 and a width of the grille corner portion 327 are equal. In addition,

an inner width of the side cover 314 and a width of the grille side border 325 are equal.

[158] The grille side border 325 is described in more detail as follows.

[159] The grille side border 325 forms an inner boundary of the outlet 102. The

side deco inner border 315 and the corner deco inner border 317 form an outer

boundary of the outlet 102.

[160] The grille side border 325 incudes a long linear section 325a extending in a

longitudinal direction of the outlet 102 and formed as a straight line, a first curved section 325b connected to one side of the long linear section 325a and having a center of curvature formed on an outer side of the intake grille 320, a second curved section

325c connected to the other side of the long linear section 325a and having a center

of curvature formed on an outer side of the intake grille 320, a first short linear section

325d connected to the first curved section 325b, and a second short linear section

325e connected to the second curved section 325c.

[161] The outlet 102 is provided between the grille side border 325 and the side deco

inner border 315, and the vane module 200 is disposed at each outlet 102.

[162] An inner edge 210a of the vane 210 of the vane module 200 is disposed to

face the grille side border325, and an outer edge 210b of the vane 210 is disposed to

face the side deco inner border 315.

[163] The outlet 102 is provided between the grille side border 325 and the side deco

inner border 315, and a vane module 200 is disposed at each outlet 102.

[164] The inner edge 210a of the vane 210 of the vane module 200 is disposed to

face the grille side border 325, and the outer edge 210b of the vane 210 is disposed

to face the side deco inner border 315.

[165] Meanwhile, the wire fixing portion 329 to which the other end of the wire is

fixed protrudes upward from the grille body portion 324. Four wire fixing portions 329

are arranged and correspond to the wires 511, 512, 521, and 522, respectively.

[166] A wire fixing portion to which the other end of a 1-1 wire 511 is fixed is defined

as a first wire fixing portion 329-1, a wire fixing portion to which the other end of the 1

2 wire 512 is fixed is defined as a second wire fixing portion 329-2, a wire fixing portion

to which the other end of the 2-1 wire 521 is fixed is defined as a third wire fixing portion

329-3, and a wire fixing portion to which the other end of the wire 2-2 wire 522 is fixed

is defined as a fourth wire fixing portion 329-4.

[167] In the top view or the bottom view, the first wire fixing portion and the second

wire fixing portion are symmetrical with reference to a direction of a motor shaft 541 of

a first unit. In the top view or the bottom view, the third wire fixing portion and the

fourth wire fixing portion are symmetrical with reference to a direction of the motor shaft

541 of a second unit.

[168] An arrangement direction of the first wire fixing portion and the second wire

fixing portion is parallel to that of the third wire fixing portion and the fourth wire fixing

portion.

[169] In this embodiment, the first wire fixing portion is located adjacent to the first

grille corner portion 327-1, the second wire fixing portion is located adjacent to the

second grille corner portion 327-2, and the third wire fixing portion is located adjacent

to the third grille corner portion 327-3, and the fourth wire fixing portion is located

adjacent to the fourth grille corner portion 327-4.

[170] The wire fixing portion 329 is disposed outside the pre-filter 330 and disposed

at the grille body 322. Each wire fixing portion protrudes upward from an upper

surface of the grille body 322.

[171] The filter coupling portion 331 is configured to fix the pre-filter 330. Since the

pre-filter 330 needs to be periodically cleaned, the pre-filter 330 is detachably

assembled to the filter coupling portion 331.

[172] In this embodiment, the filter coupling portion 331 is a structure surrounding

the edge of the pre-filter 330. The filter coupling portion 331 may be disposed outside

the grille 323 and may be disposed along the inlet 101 or the edge of the inlet portion.

[173] The filter coupling portion 331 protrudes upward from the upper surface of the

grille body portion 324, and an interval in which the pre-filter 330 may be

accommodated is formed between the filter coupling portion 331 and the upper surface of the grille body portion 324.

[174] <Configuration of Pre-filter>

[175] The pre-filter 330 is disposed above the intake grille 320. The pre-filter 330

filters foreign matter having a large volume from air intaken through the inlet 101.

[176] The pre-filter 330 is disposed above the grille 323 and covers the entire inlet

portion.

[177] The pre-filter 330 is detachably assembled to the intake grille 320 and lowered

together when the intake grille 320 is lowered.

[178] <Configuration of Elevator>

[179] The elevator 500 may lift or lower the intake grille 320 by winding or unwinding

four wires 511, 512, 521, and 522 at the same time. The user may operate the

elevator 500 by inputting an operation signal to a controller.

[180] The elevator 500 is controlled by the controller. The elevator 500 supports

the intake grille 320 at four points. The elevator 500 supports the intake grille 320

through four wires 511, 512, 521, and 522 and lifts or lowers the intake grille 320 by

winding or unwinding the wires.

[181] The elevator 500 is operated to wind or unwind four wires 511, 512, 521, and

522 simultaneously, through which the intake grille 320 may be lifted or lowered in a

horizontal state.

[182] The elevator 500 includes a first unit 510 and a second unit 520.

[183] The first unit 510 may wind or unwind a pair of wires simultaneously, and the

second unit 520 may also wind or unwind a pair of wires.

[184] A pair of wires connected to the first unit 510 is defined as a 1-1 wire 511 and

a 1-2 wire 512, and a pair of wires connected to the second unit 520 is defined as a 2

1 wire 521 and a 2-2 wire 522.

[185] The first unit 510 may simultaneously wind or unwind the 1-1 wire 511 and the

1-2 wire 512. The second unit 520 may simultaneously wind or unwind the 2-1 wire

521 and the 2-2 wire 522.

[186] One end of the 1-1 wire 511 and one end of the 1-2 wire 512 are coupled to

the first unit 510, the other end of the 1-1 wire 511 and the other end of the 1-2 wire

512 are coupled to one side of the intake grille 320.

[187] One end of the 2-1 wire 521 and one end of the 2-2 wire 522 are coupled to

the second unit 520, and the other end of the 2-1 wire 521 and the other end of the 2

2 wire 522 are coupled to the other side of the intake grille.

[188] When the 1-1 wire 511 and the 1-2 wire 512 are arranged on the left, the 2-1

wire 521 and the 2-2 wire 522 are arranged on the right. Alternatively, when the 1-1

wire 511 and the 1-2 wire 512 are arranged on a front side, the 2-1 wire 521 and the

2-2 wire 522 are arranged on a rear side.

[189] Referring to FIG. 5, the 1-1 wire 511 and the 1-2 wire 512 are located on the

left and are arranged in the front-rear direction, and the 2-1 wire 521 and the 2-2 wire

522 are located on the right and are arranged in the front-rear direction.

[190] In the bottom view or the top view, the 1-1 wire 511 and the 1-2 wire 512 are

arranged in a line, and the 2-1 wire 521 and the 2-2 wire 522 are also arranged in a

line.

[191] The 1-1 wire 511 and the 2-1 wire 521 are arranged in parallel, and the 1-2

wires 512 and the 2-2 wires 522 are arranged in parallel.

[192] The first unit 510 and the second unit 520 are arranged symmetrically to each

other. When the first unit 510 is disposed on the left of the case 100, the second unit

520 is disposed on the right of the case 100. Similarly, when the first unit 510 is

disposed on the front side of the case 100, the second unit 520 is disposed on the rear side of the case 100.

[193] In this embodiment, the first unit 510 is disposed on the left of the case 100,

and the second unit 520 is disposed on the right of the case 100.

[194] The elevator 500 provides a structure that allows the intake grille 320 to be

lifted or lowered in a horizontal state by simultaneously winding or unwinding four wires.

[195] Since the configurations of the first unit 510 and the second unit 520 are the

same, the structure of the first unit 510 will be described as an example.

[196] <Configuration of First Unit>

[197] The first unit 510 includes a drum 530 to which one end of the 1-1 wire 511

and one end of the 1-2 wire 512 are fixed, a drum motor that rotates the drum 530, a

first roller box 550 disposed to be penetrated by the 1-1 wire 511 and aligning a position

of the 1-1 wire 511 when the 1-1 wire 511 is wound or unwound, a second roller box

560 disposed to be penetrated by the 1-2 wire 512 and aligning a position of the 1-2

wire 512 when the 1-2 wire 512 is wound or unwound, and a rotation amount detecting

device 600 detecting the amount of rotation of the drum 530.

[198] The first unit 510 may be disposed at any one of the front body 310, the cabinet

housing 110, and the bell mouse 142.

[199] The drum 530, a drum motor 540, the first roller box 550, and the second roller

box 560 configuring the first unit 510 may be disposed at any one of the front body 310,

the cabinet housing 110, and the bell mouse 142.

[200] In this embodiment, a unit case 590 forming an appearance of the first unit 510

is provided to facilitate replacement and repair. The drum 530, the drum motor 540,

the first roller box 550, the second roller box 560, and the rotation amount detecting

device 600 are disposed in the unit case 590.

[201] The unit case 590 may be disposed at any one of the front body 310, the cabinet housing 110, and the bell mouse 142. In this embodiment, the unit case 590 is installed at the bell mouse 142. The unit case 590 is disposed above the intake grille 320.

[202] When it is necessary to distinguish the unit case, the unit case disposed at the

first unit is defined as a first unit case and the unit case disposed at the second unit is

defined as a second unit case.

[203] <Configuration of Drum>

[204] The drum 530 includes a drum body 535 formed in a cylindrical shape and

allowing one end of the 1-1 wire 511 and the 1-2 wire 512 to be fixed thereto, a partition

533 disposed to protrude outward in a radial direction of the drum body 535 and

partitioning a first zone 531 around which the 1-1 wire 511 is wound and a second zone

532 around which the 1-2 wire 512 is wound, a 1-1 barrier 534 disposed at the drum

body 535 and preventing the 1-1 wire 511 wound in the first zone 531 from escaping

to outside of the drum body 535, and a 1-2 barrier 536 disposed at the drum body 535

and preventing the 1-2 wire 512 wound in the second zone 532 from escaping to

outside of the drum body 535.

[205] The drum body 535 is formed in a cylindrical shape. Unlike the present

embodiment, the drum body 535 may be formed in various shapes. A recess may be

provided on an outer circumferential surface of the drum body 535 to facilitate

alignment when the wire is wound. The recess may be provided in a spiral shape

along the outer circumferential surface of the drum body 535.

[206] The partition 533 is disposed in the middle of the drum body 535 with reference

to the longitudinal direction. The partition 533 is formed to protrude radially outward

of the drum body 535. In this embodiment, the partition 533 is formed in a ring shape,

and the center of the partition 533 is disposed on the same axis as an axial center C of the drum body 535. The ring shape is disposed to protrude radially along an outer circumferential surface of the drum body 535.

[207] The axial center C of the drum body 535 and the 1-1 wire 511 or the 1-2 wire

512 intersect each other.

[208] The partition 533 divides the outer circumferential surface of the drum body

535 into the first zone 531 and the second zone 532.

[209] The 1-1 wire 511 is located at the first zone 531 and is wound or unwound at

the first zone 531. The 1-2 wire 512 is located at the second zone 532 and is wound

or unwound at the second zone 532.

[210] The partition 533 prevents the wire from being unwound outside the

corresponding zone.

[211] The 1-1 barrier 534 prevents the 1-1 wire 511 wound at the first zone 531 from

escaping to outside of the drum body 535. The 1-2 barrier 536 prevents the 1-2 wire

512 wound at the second zone 532 from escaping to outside of the drum body 535.

[212] The 1-1 barrier 534 is disposed to protrude radially outward of the drum body

535. The 1-2 barrier 536 is disposed to protrude radially outward of the drum body

535.

[213] In this embodiment, the 1-1 barrier 534 and the 1-2 barrier 536 are formed in

a ring shape along the outer circumferential surface of the drum body 535. The ring

shapes of the 1-1 barrier 534 and the 1-2 barrier 536 are disposed to protrude radially

along the outer circumferential surface of the drum body 535.

[214] One end of the 1-1 wire 511 is fixed to the first zone 531, and one end of the

1-2 wire 512 is fixed to the second zone 532.

[215] One end of the 1-1 wire 511 may be fixed to any one of the drum body 535,

the partition 533, or the 1-1 barrier 534 forming the first zone 531.

[216] In this embodiment, one end of the 1-1 wire 511 is fixed to the outer

circumferential surface of the drum body 535 at the first zone 531. Also, in this

embodiment, one end of the 1-2 wire 512 is fixed to the outer circumferential surface

of the drum body 535 at the second zone 532.

[217] In order to detect the amount of rotation of the drum 530, some components

of the rotation amount detecting device 600 may be disposed at the drum 530. In

order to detect the amount of rotation of the drum 530, a rotation detecting factor 601

is disposed. In this embodiment, the rotation detecting factor 601 is disposed at equal

intervals with reference to a circumferential direction based on the axial center C of the

drum 530. The rotation detecting factor 601 may be disposed on at least one of the

1-1 barrier 534 or the 1-2 barrier 536.

[218] <Configuration of Drum Motor>

[219] In the drum motor 540, a motor shaft 541 is assembled to the drum 530. The

motor shaft 541 and the axial center C of the drum 530 match. In this embodiment,

the drum motor 540 is a step motor.

[220] Unlike the present embodiment, gears may be arranged to provide the drum

530 with a rotational force of the drum motor 540. Through the combination of the

gears, the amount of rotation and a rotation speed of the drum 530 may be more

precisely controlled.

[221] The axial center C and an arrangement direction of the 1-1 wire 511 and the

1-2 wire 512 intersect. In this embodiment, the axial center C and the arrangement

direction of the 1-1 wire 511 and the 1-2 wire 512 are perpendicular to each other.

[222] In addition, one end of the 1-1 wire 511 and one end of the 1-2 wire 512 are

symmetrical with respect to the axial center C.

[223] To simultaneously wind or unwind the 1-1 wire 511 and the 1-2 wire 512, the

1-1 wire 511 is wound to an upper surface of the drum body 535 and the 1 -2 wire 512

is wound to a lower surface of the drum body 535.

[224] <Configuration of Roller Box>

[225] The first roller box 550 and the second roller box 560 are disposed in the unit

case 590 of the first unit 510. The first roller box 550 and the second roller box 560

are also disposed in the unit case 590 of the second unit 520.

[226] The first roller box 550 aligns the 1-1 wire 511 in order at the drum body 535

when the 1-1 wire 511 is wound or unwound at the first zone 531 of the drum 530.

[227] When the 1-1 wire 511 is not wound while forming a uniform layer on the outer

circumferential surface of the drum 530, a length difference may be formed from the 1

2 wire 512 by a thickness of the wire.

[228] When the 1-1 wire 511 wound at the first zone 531 and the 1-2 wire 512 wound

at the second zone 532 form a non-uniform layer, the intake grille 320 is inclined

relative to a horizontal direction.

[229] The second roller box 560 aligns the 1-2 wire 512 in order at the drum body

535 when the 1-2 wire 512 is wound or unwound at the second zone 532 of the drum

530.

[230] In the top view, the first roller box 550 and the second roller box 560 are

symmetrically arranged based on an intersection of the partition 533 and the axial

center C.

[231] Since the first roller box 550 and the second roller box 560 have the same

configuration, the first roller box 550 will be described as an example.

[232] The first roller box 550 includes a box 555 fixed to the unit case 590, a first

roller 551 disposed in the box 555, coming into contact with the 1-1 wire 511, rotated

by frictional contact when the 1-1 wire 511 moves, and disposed farthest from the drum

530, a fourth roller 554 disposed in the box 555, coming into contact with the 1-1 wire

511, rotated by frictional contact when the 1-1 wire 511 moves, and disposed closest

to the drum 530, a second roller 552 disposed in the box 555, coming into contact with

the 1-1 wire 511, rotated by frictional contact when the 1-1 wire 511 moves, disposed

between the first roller 551 and the fourth roller 554, and disposed to be movable in a

horizontal direction by tension of the 1-1 wire 511, and a third roller 553 disposed in

the box 555, coming into contact with the 1-1 wire 511, rotated by frictional contact

when the 1-1 wire 511 moves, disposed between the second roller 552 and the fourth

roller 554, and disposed to be movable in a horizontal direction by tension of the 1-1

wire 511.

[233] With respect to the drum 530, the first roller 551 is disposed at the farthest

position, the second roller 552 is disposed at the second farthest position, the third

roller 553 is disposed at the third farthest position, and the fourth roller 554 is located

to be closest to the drum 530.

[234] The first roller 551, the second roller 552, the third roller 553, and the fourth

roller 554 are assembled to the roller shafts 551a, 552a, 553a, and 554a, respectively,

and may be rotated about the roller shaft 551a, 552a, 553a, and 554a, respectively.

Each of the roller shafts 551a, 552a, 553a, and 554a is disposed in a horizontal

direction.

[235] At least one of the first roller 551, the second roller 552, the third roller 553,

and the fourth roller 554 is rotated in a fixed state, and the other rollers may be rotated,

while moving along a roller shaft.

[236] In the present embodiment, the first roller 551 is a fixed roller not moved along

the roller shaft. In the present embodiment, the first roller 551, in a state of being

assembled to the roller shaft 551a, is rotated in place around a roller shaft 551a.

[237] The second roller 552, the third roller 553, and the fourth roller 554 are

movable rollers movable in the horizontal direction along each roller shaft. In this

embodiment, the second roller 552, the third roller 553, and the fourth roller 554 are

rotatable in a state of being assembled to each roller shaft 552a, 553a, and 554a.

When a force (e.g., tension of wire) is applied to the second roller 552, the third roller

553, and the fourth roller 554, the second roller 552, the third roller 553, and the fourth

roller 554 may be moved along the roller shafts 552a, 553a, and 554a, respectively.

Each roller 552, 553, 554 may be moved relative to each other.

[238] The 1-1 wire 511 is aligned in line with the drum 530 by a relative movement

of the second roller 552, the third roller 553, and the fourth roller 554.

[239] A wire guard 551b is disposed to be spaced apart from the first roller 551 by a

predetermined distance. The 1-1 wire 511 is disposed between the wire guard 551b

and the first roller 551. The wire guard 551b prevents the wire wound around the

roller from being separated from the roller.

[240] Wire guards 552b, 553b, and 554b are also disposed on the second roller 552,

the third roller 553, and the fourth roller 554, respectively.

[241] The first roller 551 located on the outermost side excludes movement in an

axial direction, thereby preventing an axial movement of the wire. When the first roller

551 located outside is moved along the roller shaft 551a, a deviation may occur in the

height of the intake grille 320 and the intake grille 320 may be shaken.

[242] When the wire is wound or unwound, the first roller 551 is rotated in place in

the box 555 and the second roller 552, the third roller 553, and the fourth roller 554

may be moved along the respective roller shafts.

[243] The first roller 551, the second roller 552, the third roller 553, and the fourth

roller 554 are arranged in a zigzag form in the up-down direction.

[244] Based on the first roller 551, the second roller 552 is disposed above the first

roller 551 and the third roller 553 is disposed below the first roller 551. The fourth

roller 554 is disposed above the first roller 551 and the second roller 552, and is located

below the third roller 553.

[245] In particular, the second roller shaft 552a is located highest, the third roller

shaft 553a is located lowest, and the first roller shaft 551a is located higher than the

third roller shaft 553a and the fourth roller shaft 554a is located higher than the first

roller shaft 551.

[246] The fourth roller shaft 554a is located above the central axis C, and a wire

connecting the drum body 535 is disposed to be inclined upward. Tension may be

formed at the wire through a relative arrangement of the fourth roller shaft 554a and

the central shaft C.

[247] To reduce a horizontal width of the roller box 550, the first roller 551, the

second roller 552, the third roller 553, and the fourth roller 554 are located to overlap

each other in the up-down direction.

[248] That is, an interval between the first roller 551 and the third roller 553 is formed

smaller than a diameter of the second roller 552. In addition, an interval between the

second roller 552 and the fourth roller 554 is smaller than a diameter of the third roller

553.

[249] In this embodiment, the 1-1 wire 511 surrounds a lower outer circumferential

surface of the first roller 551 and surrounds an upper outer circumferential surface of

the fourth roller 554.

[250] Meanwhile, the second roller box 560 includes a box 565 fixed to the unit case

590, a first roller 561 and a fourth roller 564 disposed in the box 565, coming into

contact with the 1-2 wire 512, and rotated by frictional contact when the 1-2 wire 512 moves, and a second roller 562 and a third roller 563 disposed in the box 565, coming into contact with the 1-2 wire 512, rotated by frictional contact when the 1-2 wire 512 moves, and disposed to be relatively movable in an axial direction by tension of the 1

2 wire 512.

[251] The first roller 561, the second roller 562, the third roller 563, and the fourth

roller 564 are assembled to the roller shafts 561a, 562a, 563a, and 564a and may be

rotated around the roller shafts 561a, 562a, 563a, and 564a, respectively.

[252] The wire guards 561b, 562b, 563b, and 564b are disposed in the second roller

box 560 and spaced apart by a predetermined interval from the first roller 561, the

second roller 562, the third roller 563, and the fourth roller 564.

[253] The first roller box 550 and the second roller box 560 are symmetrically

disposed with respect to the drum 530. In particular, the first roller box 550 and the

second roller box 560 are disposed to be bilaterally symmetrical based on the axial

center C.

[254] With respect to the axial center C, the first rollers 551 and 561 are disposed

on the farthest side and the fourth rollers 554 and 564 are disposed on the closest side.

[255] In this embodiment, one end of the 1-1 wire 511 and one end of the 1-2 wire

512 are located on opposite sides based on the axial center of the drum 530. The1

1 wire 511 and the 1-2 wire 512 are wound around or unwound from the drum body

535 in the same direction according to rotation of the drum 530.

[256] The unit case 590 is formed in a box shape and includes a first hole 591 and

a second hole 592 provided on the side thereof.

[257] The first hole 591 is disposed on one side of the unit case 590, and the second

hole 592 is disposed on the other side of the unit case 590. For example, when the

first hole 591 is formed on the left side of the unit case 590, the second hole 592 is formed on the right side of the unit case 590.

[258] The 1-1 wire 511 and the 1-2 wire 512 penetrate the unit case 590 in the

horizontal direction.

[259] <Configuration of Wire Guider>

[260] A wire guider 700 is provided at the front body 310 to support the wire when

the wire is wound or unwound by the elevator 500. Four wire guiders 700 are

provided and correspond to the wires 511, 512, 521, and 522.

[261] A wire guider corresponding to the first wire 511 is defined as a first wire guider

701, a wire guider corresponding to the second wire 512 is defined as a second wire

guider 702, a wire guider corresponding to the third wire 513 is defined as a third wire

guider 703, and a wire guider corresponding to the fourth wire 514 is defined as a

fourth wire guider 704.

[262] The first wire guider 701 and the second wire guider 702 are disposed to face

each other. The third wire guider 703 and the fourth wire guider 704 are disposed to

face each other.

[263] The first wire guider 701, the second wire guider 702, the third wire guider 703,

and the fourth wire guider 704 are all located at the same height.

[264] In the top view or the bottom view, the first wire guider 701 and the second

wire guider 702 are symmetrical based on a direction of the motor shaft 541 of the first

unit. In the top view or the bottom view, the third wire guider 703 and the fourth wire

guider 704 are symmetrical based on the direction of the motor shaft 541 of the second

unit.

[265] An arrangement direction of the first wire guider 701 and the second wire

guider 702 and an arrangement direction of the third wire guider 703 and the fourth

wire guider 704 are parallel.

[266] In this embodiment, the first wire guider 701 is located adjacent to the first

corner cover 316-1, the second wire guider 702 is located adjacent to the second

corner cover 316-2 , the third wire guider 703 is located adjacent to the third corner

cover 316-3, and the fourth wire guider 704 is located adjacent to the fourth corner

cover 316-4.

[267] In this embodiment, the wire guider 700 is disposed at the front body 310.

The wire guider 700 protrudes from the front body 310 toward the elevator 500. Each

wire guider 700 is disposed on an inner edge 310a of the front body 310. The wire

guider 700 is located between the roller box 550 and the front body 310. The wire

guider 700 protrudes horizontally from the front body 310 toward the roller box 550.

[268] The wire guider 700 is located above the intake grille 320 and below the bell

mouse 142.

[269] The wire guider 700 includes a fixed block 710 disposed on the inner edge

310a of the front body 310 and protruding toward the roller box 550, an assembled

block 720 assembled with the fixed block 710, and a guider 750 disposed at the

assembled block 720, disposed to be rotatable in the assembled block 720, and

supporting a wire.

[270] In the present embodiment, the wire guider 700 includes the fixed block 710

and the assembled block 720, but unlike the present embodiment, the wire guider 700

may be configured as a single integrated block. The integrally configured block may

be integrally manufactured with the front body 310 or separately manufactured and

then assembled to the front body 310. However, if one block is manufactured and

integrated with the front body 310, it may be difficult to manufacture in the form of an

assembled block through injection molding as in this embodiment.

[271] <Configuration of Guider>

[272] The guider 750 supports the wire. The guider 750 may be rotated together

with the wire when the wire is wound or unwound.

[273] The guider 750 accommodates the wire and provides a structure to help the

wire move. The guider 750 may be provided in various forms, but in this embodiment,

the guider 750 is formed in a disk shape.

[274] The guider 750 includes a guider body 752 having a rotation center in a

horizontal direction, a guider recess 754 disposed on an outer surface of the guider

body 752 and provided to be concave toward the rotation center, and allowing the wire

to be inserted and supported therein, and a guide shaft 755 penetrating the rotation

center of the guider body 752 and rotatably assembled to the assembled block 720.

[275] In this embodiment, the guider body 752 is formed in a disk shape and is

disposed to be erected in the up-down direction. The guider body 752 is rotated in a

vertical direction, and the rotation center is formed in a horizontal direction. In a side

view, an outer surface 752a of the guider body 752 is formed in a circular shape.

[276] The guider recess 754 is formed concave toward the center of rotation from

the outer surface of the guider body 752. The guider recess 754 is formed in a ring

shape along the outer surface of the guider body 752.

[277] The wire is inserted into the guider recess 754 and may form a friction force

with the guider body 752 by frictional contact. The guider body 752 may be rotated

by frictional contact between the wire and the guider body 752.

[278] A guider shaft hole 753 penetrated by the guider shaft 755 is formed at the

rotation center of the guider body 752. A formation direction of the guider shaft hole

753 and a formation direction of the guider recess 754 intersect.

[279] In this embodiment, the guider shaft 755 and the guider body 752 are

separately manufactured and then assembled. Unlike the present embodiment, the guider shaft 755 and the guider body 752 may be integrally manufactured.

[280] <Configuration of Fixed Block>

[281] In this embodiment, two fixed blocks 710 are provided. Unlike the present

embodiment, one fixed block 710 may be manufactured. In this embodiment, the

fixed block 710 is manufactured integrally with the front body 310. Unlike the present

embodiment, the fixed block 710 may be separately manufactured and then assembled

to the front body 310.

[282] The fixed block 710 includes a first fixed block 711 and a second fixed block

712.

[283] The first fixed block 711 and the second fixed block 712 are disposed in a

horizontal direction and are laterally symmetrical. The first fixed block 711 and the

second fixed block 712 are spaced apart from each other to form an insertion interval

713, and a guider 750 is located at the insertion interval 713.

[284] A load applied to the guider 750 is supported through the first fixed block 711

and the second fixed block 712. Since the first fixed block 711 and the second fixed

block 712 have the same shape, the first fixed block 711 will be described as an

example.

[285] The first fixed block 711 comprises a fixed block body 730, a fastening hole

735 penetrating the fixed block body 730 in the up-down direction, a first insertion

portion 732 configuring the fixed block body 730, protruding toward the elevator 500,

assembled to the assembled block 720, and mutually engaged with the assembled

block 720 in the up-down direction, and a second insertion portion 732 configuring the

fixed block body 730, protruding toward the elevator 500, assembled to the assembled

block 720, and mutually engaged with the assembled block 720 in the up-down

direction.

[286] The first insertion portion 731 and the second insertion portion 732 are

integrally formed. Upper surfaces of the first insertion portion 731 and the second

insertion portion 732 form a continuous plane. Lower surfaces of the first insertion

portion 731 and the second insertion portion 732 also form a continuous plane. That

is, an upper surface 711a and a lower surface 711b of the first fixed block 711 are

formed as a plane, are parallel to each other, and are disposed in the horizontal

direction.

[287] The first insertion portion 731 is disposed close to the insertion interval 713,

and the second insertion portion 732 is disposed close to the insertion interval 713.

[288] The first insertion portion 731 and the second insertion portion 732 protrude in

the horizontal direction and form different protruding lengths. The first insertion

portion 731 protrudes further toward the elevator 500 than the second insertion portion

732. That is, a protruding length of the first inserting portion 731 is formed to be longer

than a protruding length of the second inserting portion 732.

[289] In this embodiment, since the volume of the first insertion portion 731 is larger

than the second insertion portion 732, the fastening hole 735 is formed at the first

insertion portion 731.

[290] The surface protruding from the first insertion portion 731 toward the

assembled block 720 is formed as a curved surface 731a. The curved surface 731a

is formed in an arrangement direction of the first insertion portion 731 and the second

insertion portion 732.

[291] In the first fixed block 711, an inner surface 711c forming the insertion interval

713 and an outer surface 711d away from the insertion interval 713 are formed parallel

to each other. The inner surface 711c and the outer surface 711d are perpendicular

to the upper surface 711a.

[292] Upper surfaces 711a and 712a of the first fixed block 711 and the second fixed

block 712 are disposed on the same plane, and lower surfaces 711b and 712b are also

disposed on the same plane.

[293] The insertion interval 713 is formed between the inner surfaces 711c and 712c

of the first fixed block 711 and the second fixed block 712. The inner surfaces 711c

and 712c of the first fixed block 711 and the second fixed block 712 are disposed

parallel to each other with reference to the up-down direction. The outer surfaces

711d and 712d of the first fixed block 711 and the second fixed block 712 are disposed

parallel to each other with reference to the up-down direction.

[294] Fastening holes 735 of the first fixed block 711 and the second fixed block 712

are parallel to each other with reference to the up-down direction.

[295] A space 739 is formed between the first fixed block 711 and the inner surface

310a of the front body 310. A space 739 is also formed between the second fixed

block 712 and the inner surface 310a of the front body 310. Each space 739 is formed

in the up-down direction and penetrates the first fixed block 711 and the second fixed

block 712. Strength of the fixed block may be improved through the space. Through

the space 739, deformation that may occur in the process of generating a fixed block

may be suppressed.

[296] Due to the space 739, a first insertion portion leg 736 connecting the first

insertion portion 731 and the inner surface 310a is formed. Due to the space 739, a

second insertion portion leg 737 connecting the second insertion portion 732 and the

inner surface 310a is formed.

[297] <Configuration of Assembled Block>

[298] The assembled block 720 is a structure surrounding an outer surface of the

fixed block 710. The fixed block 710 is inserted into the assembled block 720. The fixed block 710 and the assembled block 720 are assembled in a horizontal direction, and the fixed block 710 and the assembled block 720 form mutual engagement in the up-down direction.

[299] The assembled block 720 includes an assembled block body 740 allowing the

guider 750 to be rotatably assembled thereto and having a first block opening 721a

and a second block opening 722a provided on one surface thereof, a first insertion

space 721 provided in the assembled block body 740, provided to be concave to an

inner side of the first block opening 721a, and allowing the first fixed block 711 to be

inserted therein, a second insertion space 722 provided in the assembled block body

740, provided to be concave to an inner side of the second block opening 722a, and

allowing the second fixed block 712 to be inserted therein, a guider installation space

742 provided outside the assembled block body 740, located between the first insertion

space 721 and the second insertion space 722, and allowing the guider 750 to be

inserted therein, guider axial recesses 744 and 746 provided outside the assembled

block body 740 and supporting a rotational shaft of the guider 750, and a fastening

hole 745 penetrating an inner side and an outer side of the assembled block body 740

and allowing a fastening member to be inserted therein.

[300] In this embodiment, the first fixed block 711 is inserted into the first insertion

space 721a, and the second fixed block 712 is inserted into the second insertion space

722a. The first insertion space 721a and the second insertion space 722a are open

toward the inner surface 310a of the front body 310 and protrude toward the elevator

500.

[301] Unlike the present embodiment, one insertion space instead of the first

insertion space 721a and the second insertion space 722a may be formed. If one

insertion space is formed, the first fixed block and the second fixed block may be inserted into one insertion space, and thus a gap may occur.

[302] Since the wire guider 700 is a structure for supporting the wire, it is necessary

to minimize a gap or shaking. If the guider 750 is shaken when supporting the wire,

operation noise may not only occur and but also stronger shaking may occur in the

intake grille 320 supported by the wire.

[303] The first insertion space 721a and the second insertion space 722a are formed

in the horizontal direction. The assembled block body 740 is open at only one side

and is closed at the other side.

[304] A guider installation space 742 and guide shaft recesses 744 and 746 are

formed on an outer surface of the assembled block body 740.

[305] The guider installation space 742 is formed in a horizontal direction and a front

rear width thereof is narrower than a vertical thickness thereof. The guider installation

space 742 is formed by a first guider installation wall 742a, a second guider installation

wall 742b, and a third guider installation wall 742c.

[306] The first guider installation wall 742a and the third guider installation wall 742c

are disposed to face each other, and the second guider installation wall 742b connects

the first guider installation wall 742a and the third guider installation wall 742c. The

second guider installation wall 742b intersects the first guider installation wall 742a and

the third guider installation wall 742c and is perpendicular in this embodiment.

[307] The first guider installation wall 742a and the third guider installation wall 742c

are formed in parallel with each other, and the guider 750 is inserted between the first

guider installation wall 742a and the third guider installation wall 742c. An interval

between the first guider installation wall 742a and the third guider installation wall 742c

is formed to be longer than a thickness of the guider 750.

[308] An interval between the first guider installation wall 742a and the third guider installation wall 742c is formed to be narrower than the insertion interval 713 between the first fixed block 711 and the second fixed block 712.

[309] A vertical length of the guider installation space 742 is formed to be smaller

than a diameter of the guider 750, and the guider 750 protrudes upward and downward

from the guider installation space 742.

[310] The first guider installation wall 742a and the third guider installation wall 742c

are formed flat in the up-down direction, but the second guider installation wall 742b is

not.

[311] An upper side of the second guider installation wall 742b may protrude toward

the guider 750. In this embodiment, the upper side of the second guider installation

wall 742b includes a separation preventing protrusion 743 that protrudes gently toward

the guider 750.

[312] An interval between the second guider installation wall 742b and the guider

body 752 is formed to be smaller than a diameter of the wire, whereby the wire is

prevented from escaping between the second guider installation wall 742b and the

guider body 752.

[313] The separation preventing protrusion 743 is configured to prevent the guider

body 752 from being unintentionally separated from the assembled block 720. The

separation preventing protrusion 743 is defined as a first separation preventing

protrusion when to be designated distinguishably.

[314] The first separation preventing protrusion 743 protrudes from the second

guider installation wall 742b toward the guider 750. The first separation preventing

protrusion 743 forms a predetermined curvature and is spaced apart from the outer

surface 752a of the guider 750 by a predetermined interval.

[315] In the present embodiment, since the first separation preventing protrusion 743 formed at the assembled block is formed to surround the outer surface of the guider

750, the wire is prevented from escaping between the guider body 752 and the

assembled block 720.

[316] An interval between the first separation preventing protrusion 743 and the

outer surface 752a of the guider 750 is formed to be smaller than a diameter of the

wire, through which the wire is prevented from escaping from the wire recess 754 and

separated to the outside of the guider 750. The wire installed at the guider recess

754 is located between the second guider installation wall 742b and the wire recess

754.

[317] At least a portion of the first separation preventing protrusion 743 may have a

center of curvature disposed at a rotation center of the guider shaft 755. The first

separation preventing protrusion 743 is located above the center of rotation of the

guider shaft 755.

[318] When the guider shaft 755 is inserted into the guide shaft recess 744 and 746,

the outer surface 752a of the guider body 752 may interfere with the first separation

preventing protrusion 743. When the guider shaft 755 is inserted into the guide shaft

recesses 744 and 746, the guider body 752 is assembled with the separation

preventing protrusion 743 in an interference fitting manner. After the guider shaft 755

is assembled, the outer surface 752a of the guider body 752 and the separation

preventing protrusion 743 maintain in a state of being spaced apart from each other by

a predetermined interval.

[319] When an operator does not intentionally separate the guider 750 through such

a structure, the guider shaft 755 is caught in the separation preventing protrusion 743

and is not separated.

[320] Meanwhile, the guide shaft recesses 744 and 746 are disposed on both sides of the guider installation space 742, respectively. The first guide shaft recess 744 is disposed adjacent to the first guider installation wall 742a side and the second guide shaft recess 746 is disposed adjacent to the third guider installation wall 742c.

[321] Formation directions of the first guide shaft recess 744 and the second guide

shaft recess 746 are perpendicular to a formation direction of the guider installation

space 742. The first guide shaft recess 744 and the second guide shaft recess 746

are symmetrical to the guider installation space 742.

[322] The first guide shaft recess 744 and the second guide shaft recess 746 are

concave downward on an upper surface of the assembled block body 740.

[323] Since a shape of the second guide shaft recess 746 is symmetric to the first

guide shaft recess 744, the first guide shaft recess 744 will be described as an example.

[324] The guide shaft recesses 744 and 746 include a first axial wall 744a, a second

axial wall 744b, and a third axial wall 744c.

[325] The first axial wall 744a and the third axial wall 744c are formed parallel to

each other. The guider shaft 755 of the guider 750 is inserted between the first axial

wall 744a and the third axial wall 744c. An interval between the first axial wall 744a

and the third axial wall 744c is formed to be wider than a diameter of the guider shaft

755. The guider shaft 755 may be rotated between the first axial wall 744a and the

third axial wall 744c.

[326] A separation preventing protrusion 747 for preventing separation of the guide

shaft 755 is disposed. A configuration for preventing the guide shaft 755 from being

separated from the guide shaft recesses 744 and 746 is defined as a second

separation preventing protrusion.

[327] In this embodiment, the second separation preventing protrusion 747 is

disposed at two places. The second separation preventing protrusion 747 includes a

2-1 separation preventing protrusion 747a protruding from the first axial wall 744a

toward the third axial wall 744c and a 2-2 separation preventing protrusions 747c

protruding from the third axial wall 744c toward the first axial wall 744a.

[328] Unlike the present embodiment, only one of the 2-1 separation preventing

protrusion 747a and the 2-2 separation preventing protrusions 747c may be disposed.

[329] An interval between the 2-1 separation preventing protrusion 747a and the 2

2 separation preventing protrusion 747c is formed smaller than a diameter of the guider

shaft 755. The 2-1 separation preventing protrusion 747a and the 2-2 separation

preventing protrusion 747c are located above the center of rotation of the guider shaft

755.

[330] The 2-1 separation preventing protrusion 747a and the 2-2 separation

preventing protrusion 747c surround an outer portion of the guider shaft 755. An

arrangement direction of the 2-1 separation preventing protrusion 747a and the 2-2

separation preventing protrusion 747c intersects a longitudinal direction of the guider

shaft 755.

[331] The first separation preventing protrusion 743 and the second separation

preventing protrusion 747 not only prevent the guider from being separated from the

assembled block 720 but also suppress a vertical movement of the guider 750.

[332] During the operation of the elevator 500, the first separation preventing

protrusion 743 and the second separation preventing protrusion 747 limit shaking and

movement of the guider 750, thereby minimizing operation noise that occurs during a

rotation process of the guider 750.

[333] Since the first separation preventing protrusion 743 and the second separation

preventing protrusion 747 limit shaking and movement of the guider 750, shaking of

the intake grille 320 in the operation process of the elevator 500 may also be minimized.

[334] In this embodiment, the wire surrounds an upper side of the guider 750 and is

turned to alower side. Thus, since a load of the intake grille 320 is applied to the wire,

the guider 750 is pressed downward. That is, since the guider 750 is pressed

downward in an installation state or during operation, the guider does not escape from

the guider installation space 742 and the guider axial recesses 744 and 746 if there is

no intentional operation by the operator.

[335] In this embodiment, in order to easily install the guider, the fixed block and the

assembled block are manufactured distinguishably. Unlike the present embodiment,

the installation structure of the guider may be provided on the fixed block and the guider

may be installed. For example, a guider installation space and a guider axial recess

may be formed in the fixed block.

[336] However, the formation of the guider installation space and the guider axial

recess in the fixed block makes a structure of an injection mold complicated and may

be difficult to manufacture.

[337] <Arrangement of Wire Fixing Portion>

[338] The wire is turned to a lower side, while surrounding the guider 750, and fixed

to the intake grille 320.

[339] One end of the wire is fixed to the drum body 535 of the elevator 500 and the

other end thereof is fixed to an upper surface of the intake grille 320.

[340] The intake grille 320 includes a wire fixing portion 329 to which the other end

of the wire is fixed. The wire fixing portion 329 is disposed at the grille body 322 of

the intake grille 320. In particular, the wire fixing portion 329 is disposed in the grille

body portion 324 in which the grille hole 321 is not formed in the grille body 322 and

protrudes upward.

[341] The wire fixing portion disposed below the first wire guider 701 is defined as a first wire fixing portion, the wire fixing portion disposed below the second wire guider

702 is defined as a second wire fixing portion, the wire fixing portion disposed below

the third wire guider 703 is defined as a third wire fixing portion, and the wire fixing

portion disposed below the fourth wire guider 701 is defined as a fourth wire fixing

portion.

[342] The wire extends vertically downward through the guider 750 and is fixed to

the wire fixing portion 329. The guider 750 is located above the grille body portion

324.

[343] The wire guider 700 according to the present embodiment is located above the

intake grille 320 and is covered by the intake grille 320. In particular, since the wire

guider 700 is located above the grille body portion 324, it is not exposed to the user.

[344] The wire guider 700 is located closer to the inlet 101 than the vane module

200. The vane module 200 has a structure detachable from the front body 310 and

prevents interference with the wire during a separation process of the vane module

200.

[345] That is, the vane module 200 is located outside the four wires 511, 512, 521,

and 522, and the operator may separate the vane module 200 in a state where the four

wires 511, 512, 521, and 522 are installed.

[346] In addition, in the case of repairing or replacing the elevator 500, the operator

may separate four wires 511, 512, 521, and 522, regardless of the vane module 200,

in a state where the intake grille 320 is lowered.

[347] <Configuration of Rotation Amount Detecting Device>

[348] The rotation amount detecting device 600 is for detecting the amount of

rotation of the drum 530. The rotation amount detecting device 600 should detect a

rotation amount to be more precise than a revolution per minute (RPM) of the drum

530.

[349] In the present embodiment, the amount of rotation of the drum 530 must be

precisely detected because the 1-1 wire 511 and the 1-2 wire 512 of the first unit 510

and the 2-1 wire 521 and the 2-2 wire 522 are to be simultaneously wound or unwound.

[350] Since the rotation amount detecting devices 600 of the first unit 510 and the

second unit 520 have the same configuration, the rotation amount detecting device

600 disposed in the first unit 510 will be described as an example.

[351] The rotation amount detecting device 600 includes a rotation detecting factor

601 disposed at the drum 530 and rotated together when the drum 530 rotates, a

sensor 602 disposed to be spaced apart from the rotation detecting factor 601 and

detecting the amount of rotation of the rotation detecting factor 601, and a printed

circuit board (PCB) where the sensor 602 is disposed.

[352] The rotation detecting factor 601 is disposed at a position where the rotation

detecting factor 601 is rotated together when the drum 530 is rotated. The rotation

detecting factor 601 may be disposed on at least one of the 1-1 barrier 534 and the 1

2 barrier 536.

[353] In the present embodiment, a plurality of the rotation detecting factors 601 are

disposed, and the plurality of rotation detecting factors 601 are equally spaced with

reference to a circumferential direction based on the axial center C of the drum 530.

[354] In this embodiment, the rotation detecting factor 601 is disposed on the 1-1

barrier 534.

[355] In the present embodiment, the rotation detecting factor 601 has a sawtooth

shape. The rotation detecting factor 601 is disposed to protrude radially outward

based on the axial center C of the drum 530.

[356] The sensor 602 detects the rotation detecting factor 601. In this embodiment, the sensor 602 may be an infrared sensor or a photo sensor. The sensor 602 detects a signal generated by the rotation detecting factor 601 when the drum 530 rotates.

For example, the sensor 602 generates infrared light and receives the generated

infrared light. The controller may determine a rotation angle, the number of rotations,

and a rotation speed of the drum 530 through a change in infrared rays blocked by the

rotation detecting factor 601.

[357] In order to effectively detect the rotation detecting factor 601, a sensor

installation portion 604 is disposed to protrude from the PCB 603.

[358] The PCB 603 is disposed parallel to the axial center C. The PCB 603 is

installed on any one of the drum motor 540, the unit case 590, or a roller box.

[359] In this embodiment, the PCB 603 is installed on the drum motor 540 and

disposed parallel to the motor shaft of the drum motor 540.

[360] The sensor installation portion 604 is disposed to protrude toward the drum

530 from the PCB 603. In this embodiment, the sensor installation portion 604 is

disposed to be perpendicular to the PCB 603.

[361] The sensor 602 is installed at the sensor installation portion 604. The sensor

602 includes a light emitting unit that generates an infrared signal and a light receiving

unit that receives the infrared signal generated by the light emitting unit. Since an

operation mechanism of the sensor 602 is a general technique to those skilled in the

art, detailed description is omitted.

[362] However, structures of the sensor installation portion 604 and the PCB 603 for

effectively recognizing the rotation detecting factor 601 are characterized.

[363] The sensor installation portion 604 is formed in a "F " shape in the top view.

[364] The sensor installation portion 604 has a slot 605 allowing the rotation

detecting factor 601 to pass therethrough. When the drum 530 rotates, the rotation detecting factor 601 passes through the slot 605, and the sensor 602 detects the rotation detecting factor 601 passing through the slot 605.

[365] The slot 605 is perpendicular to the axial center of the drum 530. The slot

605 is located on a rotation plane of the rotation detecting factor 601.

[366] In this embodiment, since the rotation detecting factor 601 is disposed on the

1-1 barrier 534, the slot 605 and at least a portion of the 1-1 barrier 534 are located on

the same plane.

[367] The slot 605 is disposed in parallel with the 1-2 barrier 536 and the partition

533.

[368] The sensor installation portion 604 may be a structure in which only the sensor

602 is installed. Alternatively, the sensor installation portion 604 may be configured

as a PCB capable of providing power to the sensor 602. Thus, the PCB 603 and the

sensor installation portion 604 may be electrically connected.

[369] Unlike the present embodiment, a permanent magnet is used as the rotation

detecting factor and a Hall sensor for detecting the permanent magnet may be used

as the sensor. When a permanent magnet is used as a rotation detecting factor, a

plurality of permanent magnets may be arranged along the edge of the 1-1 barrier 534

in the circumferential direction.

[370] Unlike the present embodiment, the rotation detecting factor 601 may be

disposed at the 1-2 barrier 536 or the partition 533.

[371] Since the second unit 520 is configured to be the same as the first unit 510, a

detailed description is omitted.

[372] <Arrangement of Vane Module and Intake Grille>

[373] When the intake grille 320 is lowered, four vane modules 200 and the elevator

500 are exposed. Since each wire is maintained in an upwardly pulled state, the intake grille 320 is maintained in close contact with the front body 310.

[374] When the intake grille 320 is moved downward, four vane modules 200 and

the elevator 500 covered by the intake grille 320 are exposed.

[375] In a state where the intake grille 320 is in close contact with the front body 310,

only the vane 210 of the vane module 200 is exposed.

[376] Then, each wire guider is located above the grille corner portion 327

configuring the intake grille 320.

[377] The intake grille 320 includes a grille body 322 communicating with the inlet

101 by a plurality of grille holes 321 and having a quadrangular shape and a first grille

corner portion 327-1, a second grille corner portion 327-2, a third grille corner portion

327-3, and a fourth grille corner portion 327-4 extending in a diagonal direction from

each corner of the grille body 322.

[378] The vane module 200 includes a first vane module 201 disposed outside each

edge of the intake grille 320 and disposed between the first grille corner portion 327-1

and the second grille corner portion 327-2, a second vane module 202 disposed

outside each edge of the intake grille 320 and disposed between the second grille

corner portion 327-2 and the third grille corner portion 327-3, a third vane module 203

disposed outside each edge of the intake grille 320 and disposed between the third

grille corner portion 327-3 and the fourth grille corner portion 327-4, and a fourth vane

module 204 disposed outside each edge of the intake grille 320 and disposed between

the fourth grille corner portion 327-4 and the first grille corner portion 327-1.

[379] The vane module 200 disposed in a 12 o'clock direction is defined as the first

vane module 201, the vane module 200 disposed in a 3 o'clock direction is defined as

the second vane module 202, the vane module 200 disposed in a 6 o'clock direction is

defined as the third vane module 203, and the vane module 200 disposed in a 9 o'clock direction is defined as the fourth vane module 204.

[380] The first vane module 201, the second vane module 202, the third vane module

203, and the fourth vane module 204 are arranged at 900 intervals based on the center

C of the front panel 300.

[381] The first vane module 201 and the third vane module 203 are arranged in

parallel, and the second vane module 202 and the fourth vane module 204 are

arranged in parallel.

[382] Four side covers 314 are disposed on the front body 310. For convenience

of description, the side cover 314 disposed outside the first vane module 201 is defined

as a first side cover 314-1, the side cover 314 disposed outside the second vane

module 202 is defined as a second side cover 314-2, the side cover 314 disposed

outside the third vane module 203 is defined as a third side cover 314-3, and the side

cover 314 disposed outside the fourth vane module 204 is defined as a fourth side

cover 314-4.

[383] Each side cover 314 is assembled to the edge of the front frame 312, located

below the front frame 312, exposed to the outside, is disposed outside each vane

module 202.

[384] In addition, the corner cover 316 disposed between the first vane module 201

and the second vane module 202 is defined as a first corner cover 316-1. The corner

cover 316 disposed between the second vane module 202 and the third vane module

203 is defined as a second corner cover 316-2. The corner cover 316 disposed

between the third vane module 203 and the fourth vane module 204 is defined as a

third corner cover 316-3. The corner cover 316 disposed between the fourth vane

module 204 and the first vane module 201 is defined as a fourth corner cover 316-4.

[385] The first corner cover 316-1 is assembled to the corner of the front frame 312, located below the front frame 312, located between the first side cover 314-1 and the second side covers 314-2, and exposed to the outside.

[386] The second corner cover 316-2 is assembled to the corner of the front frame

312, located below the front frame 312, located between the second side cover 314-2

and the third side cover 314-3, and exposed to the outside.

[387] The third corner cover 316-3 is assembled to the corner of the front frame 312,

located below the front frame 312, located between the third side cover 314-1 and the

fourth side cover 314-4, and exposed to the outside.

[388] The fourth corner cover 316-4 is assembled to the corner of the front frame

312, located below the front frame 312, located between the fourth side cover 314-4

and the first side cover 314-1, and exposed to the outside.

[389] The first corner cover 316-1 and the third corner cover 316-3 are arranged

diagonally with respect to the center 0 of the front panel 300 and face each other.

The second corner cover 316-2 and the fourth corner cover 316-4 are arranged

[390] Virtual diagonal lines passing through the center of the front panel 300 are

defined as P1 and P2. P1 is an virtual line connecting the first corner cover 316-1

and the third corner cover 316-3, and P2 is a virtual line connecting the second corner

cover 316-2 and the fourth corner cover 316-4.

[391] The intake panel 320 includes a first grille corner portion 327-1, a second grille

corner portion 327-2, a third grille corner portion 327-3, and a fourth grille corner portion

327-4 extending toward the corner sides.

[392] With respect to the grille corner portions, the first vane module 201 is disposed

outside each edge of the intake grille 320 and disposed between the first grille corner

portion 327-1 and the second grille corner portion 327-2.

[393] The second vane module 202 is disposed outside each edge of the intake grille

and disposed between the second grille corner portion 327-2 and the third grille corner

portion 327-3.

[394] The third vane module 203 is disposed outside each edge of the intake grille

and disposed between the third grille corner portion 327-3 and the fourth grille corner

portion 327-4.

[395] The fourth vane module 204 is disposed outside each edge of the intake grille

and disposed between the fourth grille corner portion 327-4 and the first grille corner

portion 327-1.

[396] The first grille corner portion 327-1 extends toward the first corner cover 316

1 and forms a continuous plane with an outer surface of the first corner cover 316-1.

[397] The grille corner border 326 of the first grille corner portion 327-1 faces the

corner deco inner border 317 of the first corner cover 316-1 and forms a corner deco

inner border gap 317a.

[398] The corner grille corner 326 of the remaining grille corner portion 327 and the

corner deco inner border 317 of the corner cover 316 are also opposed to each other

and form a corner deco inner border gap 317a.

[399] The intake grille 320 includes four grille corner portions 327 that face the corner

covers 316, respectively. The grille corner portions 327 are disposed to face the

corner covers 316, respectively.

[400] The grille corner portion 327 disposed to face the first corner cover 316-1 is

defined as a first grille corner portion 327-1, the grille corner portion 327 disposed to

face the second corner cover 316-2 is defined as a second grille corner portion 327-2,

the grille corner portion 327 disposed to face the third corner cover 316-3 is defined as

a third grille corner portion 327-3, and the grille corner portion 327 disposed to face the fourth corner cover 316-4 is defined as a fourth grille corner portion 327-4.

[401] The grille side border 325 forming the edge of the grille corner portion 327 is

disposed to face the corner deco inner border 317 forming an inner edge of the corner

cover 316 and shapes of curves thereof correspond to each other.

[402] Similarly, the grille corner border 326 forming the edge of the grille corner

portion 327 is disposed to face the inner edge of the vane 210, and the shapes of the

curves thereof correspond to each other.

[403] Meanwhile, in this embodiment, in order to maintain a state in which the intake

grille 320 is in close contact with the front body 310, a permanent magnet 318 and a

magnetic force fixing portion 328 are provided.

[404] Either the permanent magnet 318 or the magnetic force fixing portion 328 may

be disposed on the front body 310, and the other of the magnetic force fixing portion

328 or the permanent magnet 318 may be disposed on an upper surface of each grille

corner portion 327.

[405] The permanent magnet 318 and the magnetic force fixing portion 328 are

located above each grille corner portion 327 and are hidden by each grille corner

portion 327. Since the permanent magnet 318 and the magnetic force fixing portion

328 are located outside each corner of the intake grille 320, a gap between the intake

grille 320 and the front body 310 may be minimized.

[406] If the intake grille 320 and the front body 310 are spaced apart from each other,

a problem that an internal pressure of the intake flow path 103 is lowered may arise.

[407] In this embodiment, the permanent magnet 318 is disposed at the front body

310. Specifically, the permanent magnet is disposed at the corner frame 313.

[408] The magnetic force fixing portion 328 is formed of a metal that interacts with

the permanent magnet 318 to form an attractive force. The magnetic force fixing portion 328 is disposed on an upper surface of the intake grille 320. Specifically, the magnetic force fixing portion 328 is disposed on an upper surface of the grille corner portion 327.

[409] When the intake grille 320 is moved upward and close to the permanent

magnet 318, the permanent magnet 318 pulls the magnetic force fixing portion 328 to

fix the intake grille 320. The magnetic force of the permanent magnet 318 is formed

smaller than a self-load of the intake grille 320. Therefore, if the intake grille 320 is

not pulled by the elevator 500, the combination of the permanent magnet 318 and the

magnetic force fixing portion 328 is released.

[410] In the top view or the bottom view, the permanent magnet 318 is disposed on

the virtual diagonal lines P1 and P2. The permanent magnet 318 is located inside the

corner cover 316.

[411] In the top view or the bottom view, one of four permanent magnets 318 is

disposed between a first module body 410 of the first vane module 201 and a second

module body 420 of the fourth vane module 204. The other three permanent magnets

are also disposed between the first module body 410 and the second module body 420

of each vane module.

[412] The permanent magnet 318 and the magnetic force fixing portion 328 are

portions 327.

[413] Hereinafter, an operation process when the intake grille is lifted or lowered

according to an embodiment of the present disclosure will be described in detail.

[414] First, an installation state of the intake grille 320 will be described in detail.

[415] The intake grille 320 may be lowered for filter cleaning or repairing the indoor

unit. The intake grille 320 is supported by four wires 511, 512, 521, and 522, and a load of the intake grille 320 is applied by all four wires 511, 512, 521, and 522.

[416] The intake grille 320 is maintained in close contact with the front body 310 by

four wires 511, 512, 521, and 522. That is, a separate coupling structure for

supporting the intake grille 320 and the front body 310 is not provided.

[417] Therefore, the user does not need to stand on a structure such as a chair to

disassemble the intake grille 320 and the front body 310 to separate the intake grille

320. That is, the intake panel 320 is lowered downward as soon as the four wires

511, 512, 521, and 522 are released by the operation of the elevator 500.

[418] In addition, since the intake grille 320 is supported only by the wires 511, 512,

521, and 522, the wires 511, 512, 521, and 522 always form a tension. If the intake

grille 320 is supported by another structure, some of the wires 511, 512, 521, and 522

may loosen and the elevator 500 may not precisely control the wires 511, 512, 521,

and 522.

[419] Since the wires 511, 512, 521, and 522 according to the present embodiment

always supports the load of the intake grille 320, the entire length of the wires 511, 512,

521, and 522 loosened outside of the elevator 500 is always in a tight state.

[420] The first wire fixing portion 329-1, the second wire fixing portion 329-2, the third

wire fixing portion 329-3, and the fourth wire fixing portion 329-4 are located at the

corners of the intake panels 320, respectively.

[421] Since each of the four wire fixing portions is pulled upward by each wire so as

to be in close contact with the front body 310, the edge of the intake grille 320 may be

brought into close contact with the front body 310 and sagging of the intake grille 320

may be minimized.

[422] Since wire guiders 701, 702, 703, and 704 are disposed for four wires 511,

512, 521, and 522, the wires 511, 512, 521, and 522 may be prevented from sagging.

[423] A load applied to each of the wire 511, 512, 521, and 522 may be partially

distributed to each of the wire guiders 701, 702, 703, and 704. In addition, since the

wires 511, 512, 521, and 522 are moved only along the wire recess 754 disposed in

the up-down direction, a horizontal movement of each of the wires 511, 512, 521, and

522 may be suppressed, whereby shaking of the intake grille 320 may be minimized.

[424] Next, a lowering process of the intake grille 320 will be described.

[425] When the user inputs an operation signal through a wireless remote controller

or a wired remote controller with the intake grille 320 mounted on the cover panel 300,

the controller determines the input operation signal and lowers the intake grille 320.

[426] When the intake grille 320 is lowered, the user may adjust a descending length

of the intake grille 320. In this embodiment, the intake grille 320 may be differentially

lowered to 1 m, 2 m, 3 m, and 4.5 m.

[427] The controller determines the input operation signal to operate the first unit

510 and the second unit 520 at the same time and determines rotation amounts of the

drum motors 540 respectively disposed in the first unit 510 and the second unit 520.

[428] When operating the drum motors 540 of the first unit 510 and the second unit

520 at the same time, revolutions per minute (RPMs) and rotation speeds of the drum

motors 540 must be matched to prevent inclination of the intake grille 320. To this

end, the drum motors 540 of the first unit 510 and the second unit 520 may be

synchronized.

[429] In this embodiment, when each drum motor 540 rotates each drum 530 in a

first direction (e.g., counterclockwise direction), the intake grille 320 is lowered.

Conversely, when each drum motor 540 rotates each drum 530 in a second direction

(e.g., a clockwise direction) opposite to the first direction, the intake grille 320 is lifted.

[430] Also, when each drum motor 540 rotates each drum 530, the rotation amount detecting device 600 disposed at the first unit 510 and the second unit 520 detects at least one of the RPM or rotation speed of the drum 530.

[431] The controller monitors data sensed by the rotation amount sensing device

600 and determines whether each drum 530 is rotated at the same speed.

[432] If steps on both sides by the first unit 510 and the second unit 520 are not

equal, correction may be performed on the number of counting of the rotation detecting

factor 601 in a stop state to correct the step. In this embodiment, the counted number

of the rotation detecting factor 601 is corrected up to three times and the elevator 500

is driven.

[433] Also, the controller monitors the descending or elevating process of the intake

grille 320 by the elevator 500 through the rotation amount detecting device 600.

[434] When the rotation of any one of the drums 530 is stopped in the process of

ascending or descending, each drum motor 540 is immediately stopped to prevent a

possibility of tilting or falling of the intake grille 320.

[435] By the operation of each drum motor 540, four wires 511, 512, 521, and 522

are simultaneously unwound from each drum 530. Each wire 511, 512, 521, and 522

passes through the fourth roller 554, the third roller 553, the second roller 552, and the

first roller 551. Each wire 511, 512, 521, and 522 extending in the horizontal direction

from each unit case 590 is changed in direction toward the ground from the guider 750

located in the horizontal direction of each unit case 590.

[436] Each wire 511, 512, 521, and 522 may be moved downward in the up-down

direction of the guider 750 while being supported on the upper surface of each guider

750. Through this process, the other ends of the wires 511, 512, 521, and 522 fixed

to the wire fixing portion 329 of the intake grille 320 are simultaneously lowered

downward.

[437] Each wire fixing portion 329 is located below each guider 750, and each wire

511, 512, 521, and 522 extends in the up-down direction.

[438] That is, since the wire fixing portion 329 is disposed below the guider 750

supporting the wire, shaking is minimized in the process of moving each wire 511, 512,

521, and 522 up and down. In addition, since the wires 511, 512, 521, and 522 are

supported by four guiders 750, a load may be evenly distributed and the load applied

to the rollers of the roller boxes may be minimized.

[439] In addition, since the guider 750 and the roller box 550 are fixed structures,

the wires are not shaken in a state of being supported by the guider 750 and the first

roller 551.

[440] Since the wire fixing portion 329 is a structure which may be shaken during the

ascending or descending process of the intake grille 320 and the wire fixing portion

329 is disposed below the guider 750, a wire length between the guider 750 and the

wire fixing portion 329 is minimized.

[441] That is, since the guider 750 and the wire fixing portion 329 are arranged in

the up-down direction, a length of the wire unwound in the descending process of the

intake grille 320 is minimized. If the wires are arranged diagonally, it is necessary to

unwind the wires longer than those in the up-down direction when the intake grille is

lowered.

[442] Next, a lifting process of the elevator 500 will be described in detail.

[443] In a state where the intake grille 320 is lowered, the controller may lift the intake

grille 320 to its original position upon receiving the user's operation signal.

[444] The controller rotates the drums 530 of the first unit 510 and the second unit

520 in a clockwise direction to return the intake grille 320 to the initial position.

[445] The controller maintains the rotation amount and rotation speed of each drum

530 to be the same, thereby lifting the intake grille 320 in a horizontal state.

[446] When the intake grille 320 is lifted, the wire fixing portion 329 is moved upward

in a vertical direction and the ends of the wires are also moved upward from the lower

side.

[447] According to the rotation of the drums 530, the 1-1 wire 511 and the 1-2 wire

512 of the first unit and the 2-1 wire 521 and the 2-2 wire 522 of the second unit 520

are simultaneously wound around the drums 520, respectively.

[448] When the drum 530 of the first unit 510 rotates, the 1-1 wire 511 and the 1-2

wire 512 are aligned and wound around a first zone 531 and a second zone 532 of the

drum 530 in a horizontal direction.

[449] The 1-1 wire 511 passes through the guider 750 in the vertical direction, turns

in the horizontal direction, passes through the first roller 551, the second roller 552, the

third roller 553, and the fourth roller 554, and is then wound on the outer circumferential

surface of the drum body 535 of the first zone 531. After the 1-1 wire 511 is wound in

a row on the outer circumferential surface of the drum body 535, the 1-1 wire is wound

again on the 1-1 wire 511 wound in a row, while forming a layer.

[450] The 1-2 wire 512 passes through the guider 750 in the vertical direction, turns

in the horizontal direction, passes through the first roller 561, the second roller 562, the

third roller 563, and the fourth roller 564, and is then wound on the outer circumferential

surface of the drum body 535 of the second zone 532.

[451] Meanwhile, the 2-1 wire 521 and the 2-2 wire 522 are wound on the second

unit 520 which rotates simultaneously with the first unit 510 at the same rate as that of

the first unit 510.

[452] Like the first unit 510, when the drum 530 of the second unit 520 rotates, one

end of the 2-1 wire 521 and one end of the 2-2 wire 522 are wound, while being aligned in the first zone 531 and the second zone 532 of the drum 530.

[453] As in the present embodiment, the intake grille 320 includes the 1-1 wire 511,

the 1-2 wire 512, the 2-1 wire 521, and the 2-2 wire 522.

[454] In a state where the intake grille 320 is supported at four points, both sides of

the intake grille 320 may be simultaneously lifted or lowered by synchronizing the

rotation amount and the rotation speed of the drums 530 disposed at the first unit 510

and the second unit 520.

[455] In the indoor unit according to the present embodiment, although the drum

motor 540 disposed on the first unit 510 and the second unit 520, the controller may

uniformly control the four wires through the rotation amount detecting device 600.

[456] In addition, since the indoor unit according to the present embodiment provides

the structure in which the 1-1 wire 511 and the 1-2 wire 512 are simultaneously wound

or unwound by driving one drum 530, tilting of the intake grille 320 may be prevented.

[457] The embodiments have been described with reference to the accompanying

drawings but various modifications may be made without being limited thereto and it

will be understood by those of skill in the art that various changes in form and details

may be made without departing from the spirit and scope of the present disclosure as

set forth in the following claims. Therefore, the embodiments described above are

merely illustrative and should not be understood as a limitation of the present

disclosure.

[Description of reference numeral]

100: case 101: inlet

102: outlet 103: intake flow path

104: discharge flow path 110: case housing

120: front panel 130: indoor heat exchanger

140: indoor blower fan 200: vane module

300: front module 310: front body

320: intake grille 321: grille hole

322: grille body 323: grille

324: grille body portion 329: wire fixing portion

330: pre-filter 500: elevator

600: rotation amount detecting device 700: wire guider

701: first wire guider 702: second wire guider

703: third wire guider 704: fourth wire guider

710: fixed block 720: assembled block

730: fixed block body 740: assembled block body

750: guider

Claims

[CLAIMS]

[Claim 1]

An air-conditioner comprising:

a case having an inlet and an outlet;

an intake grille disposed to be separated from the case, and the intake grille

disposed to be movable up and down with respect to the case;

a first unit disposed at the case, and the first unit winding or unwinding a wire

which is connected to the intake grille;

a wire guider disposed at the case, and the wire guider supporting the wire

which is extended from the first unit;

wherein the wire guider comprises:

a block disposed at the case; and the block comprising a guider

installation wall which faces the wire passing through the wire guider,

a guider body rotatably coupled to the block, and the guider body

having a guider recess extending along a circumferential surface of the guider

body;and

a guider shaft penetrating a center of the guider body, and the guider

shaft coupled to the block to be rotatable,

wherein the wire passing through the wire guider is located in the guider recess

and passes between the guider body and the guider installation wall,

wherein a distance between the guider body and the guider installation wall is

smaller than a diameter of the wire, and the guider installation wall comprises a

separation preventing protrusion which protrudes towards the guider body.
[Claim 2]

The air conditioner of claim 1, wherein the block comprises:

a fixed block protruding toward the first unit; and

an assembled block coupled to the fixed block,

wherein the guider shaft is rotatably assembled to the assembled block.
[Claim 3]

The air conditioner of claim 1 or claim 2, wherein the guider shaft is separable

from the guider body.
[Claim 4]

The air conditioner of claim 2 or claim 3, wherein the assembled block

comprises:

an assembled block body assembled with the fixed block and fixed to the fixed

block; and

a guider installation space located outside the assembled block body, and the

guider body is rotatably inserted to the guider installation space,

wherein the guider shaft intersects the guider installation space.
[Claim 5]

The air conditioner of claim 4, wherein

the guider shaft is located inside the guider installation space.
[Claim 6]

The air conditioner of claim 4 or claim 5, wherein the guider installation space

comprises: a first guider installation wall formed at the assembled block body, and the first guider installation wall facing one side of the guider; a third guider installation wall formed at the assembled block body, and the third guider installation wall facing the other side of the guider; and a second guider installation wall formed at the assembled block body, and the second guider installation wall connecting the first guider installation wall and the third guider installation wall, wherein an interval between the second guider installation wall and the guider body is smaller than the diameter of the wire.
[Claim 7]

The air conditioner of claim 6, further comprising:

a separation preventing protrusion located above the guider shaft and

protruding toward the guider body from the second guider installation wall,

wherein an interval between the separation preventing protrusion and the

guider body is smaller than the diameter of the wire.
[Claim 8]

The air conditioner of claim 7, wherein the separation preventing protrusion

engages with an outer surface of the guider body when the guider moves in the vertical

direction.
[Claim 9]

The air conditioner of claim 7 or claim 8, wherein the separation preventing

protrusion has an arc shape and surrounds an outer surface of the guider body.
[Claim 10]

The air conditioner of any one of claims 4 to 9, further comprising:

a guider shaft recess formed outside the assembled block body, and the guider

shaft is rotatably inserted to the guider shaft recess,

wherein the guider shaft recess is formed to be concave in a downward

direction from an upper surface of the assembled block body.
[Claim 11]

The air conditioner of claim 10, wherein the guider shaft recess comprises:

a first axial wall formed at the assembled block body, and extending in a

longitudinal direction of the guider shaft;

a third axial wall formed at the assembled block body, extending in the

longitudinal direction of the guider shaft, and facing the first axial wall;

a second axial wall formed at the assembled block body, and connecting the

first axial wall and the third axial wall; and

a second separation preventing protrusion disposed on at least one of the first

axial wall or the third axial wall, and engaging with an upper portion of the guider shaft.
[Claim 12]

The air conditioner of any one of claims 1 to 11, wherein the wire guider

comprises:

a first wire guider through which a 1-1 wire extending from the first unit passes;and a second wire guider through which a 1-2 wire extending from the first unit passes, the guider shaft of the first wire guider and the guider shaft of the second wire guider are arranged in a line.
[Claim 13]

The air conditioner of any one of claims 1 to 11, wherein the wire guider

comprises:

a first wire guider through which a 1-1 wire extending from the first unit passes;and

a second wire guider through which a 1-2 wire extending from the first unit passes,

a second unit disposed at the case, coupled to the intake grille through a 2-1

wire and a 2-2 wire, and lifting or lowering the other side of the intake grille by

simultaneously winding or unwinding the 2-1 wire and the 2-2 wire;

a third wire guider disposed at the case, supporting the 2-1 wire, and located

above the intake grille; and

a fourth wire guider disposed at the case, supporting the 2-2 wire, and located

above the intake grille.
[Claim 14]

The air conditioner of claim 13, wherein the 1-1 wire and the 1-2 wire are

arranged in a line and the 2-1 wire and the 2-2 wire are arranged in a line in a bottom

view, and

the 1-1 wire, the 1-2 wire, the 2-1 wire and the 2-2 wire are arranged in a parallel line.
[Claim 15]

The air conditioner of claim 13 or claim 14, wherein a second unit winds or

unwinds the 2-1 wire and the 2-2 wire, and

the first wire guider and the second wire guider are located within a height of

the first unit, and the third wire guider and the fourth wire guider are located within a

height of the second unit.
[Claim 16]

The air conditioner of any one of claims 13 to 15, wherein the intake grille

comprises:

a first wire fixing portion to which the 1-1 wire is fixed;

a second wire fixing portion to which the 1-2 wire is fixed;

a third wire fixing portion to which the 2-1 wire is fixed; and

a fourth wire fixing portion to which the 2-2 wire is fixed,

wherein the first wire fixing portion is located below the first wire guider, the

second wire fixing portion is located below the second wire guider, the third wire fixing

portion is located below the third wire guider, and the fourth wire fixing portion is located

below the fourth wire guider.
[Claim 17]

The air conditioner of any one of claims 13 to 16, wherein the first wire guider,

the second wire guider and the first unit are located in a line, and the third wire guider,

the fourth wire guider and the second unit are located in a line.
[Claim 18]

The air conditioner of any one of claims 13 to 17, wherein the first wire guider,

the second wire guider, the third wire guider, and the fourth wire guider are located at

the same height.
[Claim 19]

The air conditioner of any one of claims 13 to 18, wherein a bottom surface of

the case has a square shape, the bottom surface forms four corners, the first wire

guider is disposed at one of two corners disposed on one side, the second wire guider

is disposed on the other of the two corners disposed on one side, the third wire guider

is disposed on one of the two corners disposed on the other side, and the fourth wire

guider is disposed on the other of the two corners disposed on the other side.
[Claim 20]

The air conditioner of any one of claims 13 to 19, wherein the air conditioner

further comprises a second unit winding or unwinding the 2-1 wire and the 2-2 wire,

wherein the case comprises:

a case housing installed to hang on a ceiling of a room and having an

open bottom surface; and

a front body covering the bottom surface of the case housing and

including the inlet and the outlet,

the first unit and the second unit are disposed in the case housing,

the first wire guider, the second wire guider, the third wire guider, and

the fourth wire guider are disposed on the front body, and

the intake grille is disposed on a lower side with respect to the front body.