CN111742179B - Ceiling type indoor unit of air conditioner - Google Patents

Abstract

In the ceiling type indoor unit of the air conditioner, the suction grille is kept in close contact with the front body in a state of being supported by the ropes, therefore, the suction grille can be immediately lowered when the lifter operates, the four rope guides support the ropes, therefore, the load of the suction grille can be dispersed, and the interval between the guide body and the block is smaller than the diameter of the ropes, therefore, the ropes are prevented from being separated from the space between the guide body and the block.

Description

Ceiling type indoor unit of air conditioner

Technical Field

The present invention relates to a ceiling type indoor unit of an air conditioner, and more particularly, to a ceiling type indoor unit capable of automatically lowering or raising a suction grill.

Background

Generally, an air conditioner is composed of a compressor, a condenser, an evaporator, and an expander, and supplies cold or hot air to a building or room using an air conditioning cycle.

The air conditioner is structurally divided into a split type in which a compressor is disposed outdoors and an integrated type in which the compressor is integrally manufactured.

The split type is that an indoor heat exchanger is arranged in an indoor unit, an outdoor heat exchanger and a compressor are arranged in an outdoor unit, and two devices which are separated from each other are connected by a refrigerant pipe.

The integration is that the indoor heat exchanger, the outdoor heat exchanger and the compressor are arranged in a shell. As the integrated air conditioner, there are a window-mounted type air conditioner in which the device is directly mounted on a window, a duct type air conditioner in which a suction duct and a discharge duct are connected and mounted on the indoor and outdoor sides, and the like.

The split type air conditioner is generally divided according to an installation form of an indoor unit.

A vertical type air conditioner in which an indoor unit is vertically installed in an indoor space, a wall-mounted type air conditioner in which an indoor unit is installed on an indoor wall, and a ceiling type indoor unit in which an indoor unit is installed on an indoor ceiling are known.

In the case of a ceiling-type indoor unit, the suction grill is disposed so as to face the floor. The suction grill is provided with a filter for filtering foreign substances of indoor air, and the filter can be separated for cleaning. The user periodically separates the suction grill from the housing in order to clean the filter.

However, in the case of the ceiling type indoor unit of the related art, since the suction grill is disposed on the ceiling of the room, there is a problem that the user needs to stand above the structure such as a chair in order to separate the suction grill.

Prior art documents

Patent document

Korean granted invention patent No. 10-0679838B1

Disclosure of Invention

Technical subject

The invention aims to provide a ceiling type indoor unit of an air conditioner, which enables the whole suction grille to ascend or descend along the vertical direction.

The invention aims to provide a ceiling type indoor unit of an air conditioner, which has a structure that four cords can be simultaneously unwound or wound by using two motors.

The invention aims to provide a ceiling type indoor unit, which can prevent falling when a suction grille ascends or descends.

The invention aims to provide a ceiling type indoor unit of an air conditioner, which can minimize shaking when a suction grille ascends or descends.

The invention aims to provide a ceiling type indoor unit of an air conditioner, which can minimize the separation of impurities attached to a filter when a suction grille ascends or descends.

The object of the present invention is not limited to the above-mentioned object, and other objects mentioned can be clearly understood by those skilled in the art from the following description.

Technical scheme for solving problems

In the present invention, the interval between the guide body and the block is smaller than the diameter of the string, and thus, the string is prevented from being separated toward between the guide body and the block.

In the present invention, the elevator simultaneously unwinds or winds a plurality of cords connected to the suction grill, thereby raising or lowering the suction grill in the vertical direction as a whole.

In the present invention, the four cords support four positions near the corners of the suction grill, and thus, it is possible to minimize shaking during the ascent or descent of the suction grill.

In the present invention, the pair of cords disposed on one side of the suction grill are controlled by one motor, and thus, the variation in height with respect to one side of the suction grill can be minimized.

In the present invention, since the four cords are supported by the respective guides disposed on the casing, it is possible to minimize the shaking during the ascending or descending of the suction grill.

In the present invention, four cords support four positions near the corners of the suction grill, and therefore, even if one cord is damaged, the remaining three cords can support the suction grill, whereby the falling of the suction grill can be prevented.

In the present invention, since the four cords are supported by the respective guides disposed on the casing, it is possible to suppress the vibration of the suction grill and minimize the separation of the foreign substances attached to the filter during the lowering of the suction grill.

The invention comprises the following steps: a housing suspended from an indoor ceiling and having a suction port and a discharge port formed toward a lower side; a suction grill which is disposed separately from the housing and covers the suction port of the housing; a first unit disposed inside the casing, coupled to the suction grill by a 1 st-1 st string and a 1 st-2 st string, and configured to raise or lower one side of the suction grill by simultaneously winding or unwinding the 1 st-1 st string and the 1 st-2 st string; a first string guide disposed on the casing, supporting the 1 st-1 st string connecting the suction grill and the first unit, and positioned above the suction grill; and a second cord guide disposed in the casing, supporting the 1 st to 2 nd cords connecting the suction grill and the first unit, and positioned above the suction grill, the first cord guide and the second cord guide each including: a block disposed at an inner edge of the housing; and a guide member which is assembled to the block, is rotatable with respect to the block, and supports each of the wires.

The guide member includes: a guide body having a rotation center formed in a horizontal direction; a cord groove that is disposed on an outer side surface of the guide body and is formed to be recessed toward the rotation center, and into which the cord is inserted and supported; and a guide shaft penetrating a rotation center of the guide body and rotatably assembled to the block, a space between the guide body and the block being smaller than a diameter of the wire.

The block may include: a fixed block disposed at an inner edge of the housing where the suction port is formed, and protruding toward the first unit or the second unit; and an assembly block assembled to the fixed block, the guide shaft being rotatably assembled to the assembly block.

The guide shaft may be separable from the guide body and provided so as to penetrate through a rotation center of the guide body.

The assembly block may include: the assembling block main body is assembled with the fixing block and fixed on the fixing block; and a guide mounting space disposed outside the assembly block body, the guide being rotatably inserted into the guide mounting space, the guide mounting space being formed along a vertical direction, the guide shaft intersecting the guide mounting space.

The guide shaft may be located within a height of the guide mounting space.

The guide mounting space may include: a first guide mounting wall formed on the assembly block body, formed along a rotation direction of the guide, and facing one side surface of the guide; a third guide mounting wall formed on the assembly block body, formed along a rotation direction of the guide, and facing the other side surface of the guide; and a second guide mounting wall formed at the assembly block body along the guide axis direction and connecting the first guide mounting wall and the third guide mounting wall, a space between the second guide mounting wall and the guide body being smaller than a diameter of the cord.

The present invention may include: and a separation preventing protrusion located at an upper side of the guide shaft and protruding from the second guide mounting wall toward an outer side surface of the guide body, wherein a space between the separation preventing protrusion and the guide body is smaller than a diameter of the string.

The separation preventing protrusion may be engaged with an outer surface of the guide body when the guide moves in the vertical direction.

The separation preventing protrusion may be formed in an arc shape and formed in a manner of surrounding an outer side surface of the guide body.

The present invention may further comprise: a guide shaft groove formed outside the assembly block body, the guide shaft being rotatably inserted into the guide shaft groove,

the guide shaft groove is concavely formed from the upper side surface of the assembly block main body in a lower side direction and intersects with the guide mounting space.

The guide shaft groove may include: a first shaft wall formed at the assembly block body and formed along a length direction of the guide shaft; a third shaft wall formed in the assembly block body, formed along a longitudinal direction of the guide shaft, and facing the first shaft wall; a second shaft wall formed at the assembly block body, intersecting with a longitudinal direction of the guide shaft, and connecting the first shaft wall and the third shaft wall; and a separation prevention protrusion which is disposed on at least one of the first shaft wall and the third shaft wall, protrudes toward the third shaft wall or the first shaft wall, and is engaged with an upper side of the guide shaft.

The guide shafts of the first cord guide and the second cord guide may be arranged in a row.

The present invention may include: a second unit disposed inside the casing, coupled to the suction grill by a 2-1 st string and a 2-2 nd string, and ascending or descending the other side of the suction grill by simultaneously winding or unwinding the 2-1 st string and the 2-2 nd string; a third string guide disposed on the casing, supporting the 2 nd-1 st string connecting the suction grill and the second unit, and positioned above the suction grill; and a fourth cord guide disposed on the casing, supporting the 2 nd to 2 nd cords connecting the suction grill and the second unit, and positioned above the suction grill.

The 1 st-1 st cord and the 1 st-2 nd cord may be arranged in a line and the 2 nd-1 st cord and the 2 nd-2 nd cord may be arranged in a line in a bottom view, and an arrangement direction of the 1 st-1 st cord and the 1 st-2 nd cord and an arrangement direction of the 2 nd-1 st cord and the 2 nd-2 nd cord may be parallel to each other in the bottom view.

The first and second cord guides may be located within the height of the first unit, and the third and fourth cord guides are located within the height of the second unit.

The suction grill may further include: a first cord fixing part to which the 1 st-1 st cord is fixed; a second cord fixing part to which the 1 st-2 nd cords are fixed; a third wire fixing part to which the 2 nd-1 th wire is fixed; and a fourth cord fixing part to which the 2 nd to 2 nd cords are fixed, the first cord fixing part being located at a lower side of the first cord guide, the second cord fixing part being located at a lower side of the second cord guide, the third cord fixing part being located at a lower side of the third cord guide, the fourth cord fixing part being located at a lower side of the fourth cord guide.

The first and second cord guides may be positioned in the longitudinal direction of the first unit and spaced apart from the first unit, and the third and fourth cord guides may be positioned in the longitudinal direction of the second unit and spaced apart from the second unit.

The first, second, third, and fourth cord guides may be disposed at the same height with respect to the bottom surface of the case.

The bottom surface of the case may be formed in a quadrangular shape when viewed from the bottom, the bottom surface forming four corners, the first cord guide being disposed at one of the two corners disposed on one side, the second cord guide being disposed at the remaining one of the two corners disposed on one side, the third cord guide being disposed at one of the two corners disposed on the other side, and the fourth cord guide being disposed at the remaining one of the two corners disposed on the other side.

The housing may further include: a housing body which is suspended from an indoor ceiling and has an open bottom; and a front body covering a bottom surface of the casing case and having the suction port and the discharge port formed therein, wherein the first unit and the second unit are disposed inside the casing case, the first cord guide, the second cord guide, the third cord guide, and the fourth cord guide are disposed in the front body, and the suction grill is disposed below the front body.

Effects of the invention

The ceiling type indoor unit of an air conditioner of the present invention has one or more of the following effects.

First, in the present invention, the four cords coupled to the suction grill are wound or unwound simultaneously by the elevator, so that the suction grill can be automatically raised or lowered.

Secondly, in the present invention, the suction grill is supported by four points by four wires, and thus can be stably raised or lowered.

Third, in the present invention, since the suction grill is held in close contact with the front body in a state where the suction grill is supported by the four wires, the suction grill is immediately lowered when the lifter is operated.

Fourth, in the present invention, since the four wire guides support the wires, the load of the suction grill can be dispersed, and the load applied to the lifter can be minimized.

Fifth, in the present invention, since each wire is kept inserted into the wire groove of the wire guide, the wire can be prevented from being detached from the guide.

Sixth, in the present invention, since the interval between the guide body and the block is smaller than the diameter of the string, the string can be prevented from being separated between the guide body and the block.

Seventh, in the present invention, since each cord guide is positioned above the cord fixing portion, it is possible to minimize the vibration of the suction grill during winding or unwinding each cord.

Eighth, in the present invention, since the guide presses the assembly block by the load applied to the wire, the guide is prevented from being separated from the assembly block even if the guide rotates due to the movement of the wire.

Ninth, in the present invention, since the separation preventing protrusion formed in the assembly block is formed so as to surround the outer side surface of the guide, the separation of the cord between the guide body and the assembly block can be prevented.

Tenth, in the present invention, the separation preventing projection formed at the assembly block is disposed at a position higher than the guide shaft and projects toward the guide main body side, and therefore, the guide is prevented from being detached from the guide mounting space.

Drawings

Fig. 1 is a perspective view showing an air conditioning indoor unit according to an embodiment of the present invention.

Fig. 2 is a diagram of an example of the operation of fig. 1.

Fig. 3 is a cross-sectional view of fig. 1.

Fig. 4 is an exploded perspective view illustrating the front panel of fig. 1.

Fig. 5 is a plan view showing the arrangement of the front panel and the lifter of fig. 1.

Fig. 6 is a bottom view of the front panel shown in fig. 1.

Fig. 7 is a lower perspective view illustrating the lifter of fig. 2.

Fig. 8 is a bottom view showing the front panel and the lifter of fig. 2.

Fig. 9 is a perspective view illustrating an internal structure of the lifter of fig. 2.

Fig. 10 is a top view of fig. 9.

Fig. 11 is a view illustrating the operation of the lifter according to the first embodiment of the present invention.

Fig. 12 is an explanatory view showing an installation structure of a wire rope of the first embodiment of the present invention.

Fig. 13 is a bottom view of the front panel shown in fig. 1.

Fig. 14 is a plan view of the suction grill shown in fig. 4.

Fig. 15 is an exploded perspective view of the cord guide shown in fig. 13.

Fig. 16 is another exploded perspective view of the cord guide of fig. 15.

Fig. 17 is a top view of the cord guide of fig. 13.

Fig. 18 is a side cross-sectional view of the cord guide of fig. 17.

Fig. 19 is a perspective view showing an assembled structure of the guide shaft shown in fig. 17.

Detailed Description

The advantages, features and methods for achieving the same of the present invention will be more apparent by referring to the drawings and detailed embodiments described later. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various forms, and the embodiments are only for the purpose of more fully disclosing the present invention, so as to more fully suggest the scope of the present invention to those skilled in the art to which the present invention pertains, and the present invention is defined only by the scope of the claims. Throughout the specification, like reference numerals denote like structural elements.

The present invention will be described in detail below with reference to the accompanying drawings.

Fig. 1 is a perspective view showing an air conditioning indoor unit according to an embodiment of the present invention. Fig. 2 is a diagram of a working example of fig. 1. Fig. 3 is a cross-sectional view of fig. 1. Fig. 4 is an exploded perspective view illustrating the front panel of fig. 1. Fig. 5 is a plan view showing the arrangement of the front panel and the lifter of fig. 1. Fig. 6 is a bottom view of the front panel shown in fig. 1. Fig. 7 is a lower perspective view illustrating the lifter of fig. 2. Fig. 8 is a bottom view showing the front panel and the lifter of fig. 2. Fig. 9 is a perspective view illustrating an internal structure of the lifter of fig. 2. Fig. 10 is a top view of fig. 9. Fig. 11 is a view illustrating the operation of the lifter according to the first embodiment of the present invention. Fig. 12 is an exploded perspective view of the roller shown in fig. 5. Fig. 13 is an explanatory view illustrating an arrangement of the wire rope shown in fig. 2. Fig. 14 is a plan view of the suction grill shown in fig. 4. Fig. 15 is an exploded perspective view of the cord guide shown in fig. 13. Fig. 16 is another exploded perspective view of the cord guide of fig. 15. Fig. 17 is a top view of the cord guide of fig. 13. Fig. 18 is a side cross-sectional view of the cord guide of fig. 17. Fig. 19 is a perspective view showing an assembled structure of the guide shaft shown in fig. 17.

< construction of indoor Unit >

The indoor unit of an air conditioner of the present embodiment includes: a casing 100 having a suction port 101 and a discharge port 102; an indoor heat exchanger 130 disposed inside the housing 100; and an indoor fan 140 disposed inside the casing 100 and configured to flow air to the suction port 101 and the discharge port 102.

The casing 100 further includes a suction grill 320 disposed toward the floor of the room, and a lifter 500 for vertically moving the suction grill 320 is disposed in the casing 100.

In case of receiving an operation signal input by a user, the lifter 500 operates, and the four cords 511, 512, 521 and 522 are simultaneously unwound or wound as the lifter 500 operates, and the suction grill 320 combined with the cords 511, 512, 521 and 522 may move in a vertical direction.

The structure for ascending and descending the suction grill 320 will be described in more detail later.

< construction of housing >

In the present embodiment, the housing 100 includes a housing case 110 and a front panel 300. The housing case 100 is suspended from an indoor ceiling by a hanger (not shown), and an opening is formed at a lower side thereof. The front panel 300 covers the open surface of the casing 110 and is disposed facing the floor of the room, and the front panel 300 is exposed to the room and has the suction port 101 and the discharge port 102.

The housing 100 may be implemented in various ways according to the manufacturing form, and the structure of the housing 100 is not limited to the technical idea of the present invention.

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 suction ports 101 or the number of the discharge ports 102 is not related to the technical idea of the present invention. In this embodiment, one suction port 101 is formed, and a plurality of discharge ports 102 are arranged.

In this embodiment, the suction port 101 is formed in a quadrangular shape when viewed from the bottom, and four discharge ports 102 are disposed at predetermined intervals from the respective edges of the suction port 101.

< construction of indoor Heat exchanger >

The indoor heat exchanger 130 is disposed between the suction port 101 and the discharge port 102, and the indoor heat exchanger 130 divides the interior of the casing 100 into an inner side and an outer side. The indoor heat exchanger 130 is configured in a vertical manner in the present embodiment.

An indoor blowing fan 140 is disposed inside the indoor heat exchanger 130.

The indoor heat exchanger is formed in an overall shape of "□" in a top view or a bottom view, and a part of the section of the indoor heat exchanger may be separated.

The indoor heat exchanger 130 is configured to allow air discharged from the indoor blowing fan 140 to enter in a vertical manner.

A drain pan 132 is provided inside the housing 100, and the indoor heat exchanger 130 is placed on the drain pan 132. The condensed water generated from the indoor heat exchanger 130 may be stored after flowing to the drain pan 132. A drain pump (not shown) for discharging the collected condensed water to the outside is disposed in the drain pan 132.

The drain pan 132 may be formed with a directional inclined surface so as to collect and store the condensed water flowing down from the indoor heat exchanger 130 to one side.

< construction of indoor Fan >

The indoor blowing fan 140 is positioned inside the casing 100 and is disposed above the suction port 101. The indoor fan 140 is a centrifugal fan that sucks air into the center and discharges the air in the circumferential direction.

The indoor blowing fan 140 includes a bell mouth 142, a fan 144, and a fan motor 146.

The bell mouth 142 is disposed above the suction grill 320 and below the fan 144. The bell mouth 142 guides the air passing through the suction grill 320 toward the fan 144.

The fan motor 146 rotates the fan 144. The fan motor 146 is fixed to the housing case 110. The fan motor 146 is disposed above the fan 144. At least a portion of the fan motor 146 is located at a higher elevation than the fan 144.

The fan motor 146 is disposed with a motor shaft facing downward, and the fan 144 is coupled to the motor shaft.

The indoor heat exchanger 130 is disposed outside the edge of the fan 144. The fan 144 and at least a portion of the indoor heat exchanger 130 are disposed on the same horizontal line. Further, at least a part of the bell mouth 142 is inserted into the fan 144. At least a portion of the bell mouth 142 overlaps the fan 144 in the up-down direction.

< construction of flow channel >

The indoor heat exchanger 130 is disposed inside the outer case 110, and divides an inner space of the outer case 110 into an inner side and an outer side.

The inner space surrounded by the indoor heat exchanger 130 is defined as an intake flow path 103, and the outer space of the indoor heat exchanger 130 is defined as a discharge flow path 104.

The indoor fan 140 is disposed in the suction passage 103. The discharge flow path 104 is between the outside of the indoor heat exchanger 130 and the side wall of the casing 110.

The suction flow path 103 is an inner side surrounded by "□" of the indoor heat exchanger and the discharge flow path 104 is an outer side surrounded by "□" of the indoor heat exchanger in a plan view or a bottom view.

The suction channel 103 communicates with the suction port 101, and the discharge channel 104 communicates with the discharge port 103.

The air flows from the lower side to the upper side of the inhalation flow path 103 and flows from the upper side to the lower side of the discharge flow path 104. The flow direction of the air is switched by 180 degrees with respect to the indoor heat exchanger 130.

The suction port 101 and the discharge port 102 are formed on the same surface of the front panel 300.

The suction port 101 and the discharge port 102 are disposed so as to face in the same direction. In the present embodiment, the suction port 101 and the discharge port 102 are disposed so as to face the floor surface in the room.

When the front plate 300 is curved, the discharge port 102 may be formed to have a slight side inclination, but the discharge port 102 connected to the discharge flow path 104 is formed to face downward.

A vane module 200(vane module) is provided in the present invention, and the vane module 200 is used to control the direction of the air discharged through the discharge port 102.

< construction of front Panel >

The front panel 300 includes: a front body 310 coupled to the casing housing 110 and having the suction port 101 and the discharge port 102 formed therein; a suction grill 320 formed with a plurality of grill holes 321 for covering the suction port 101; a pre-filter 330 detachably assembled to the suction grill 320; a vane module 200 disposed at the front body 310 for controlling the air flow direction of the discharge port 102.

The suction grill 320 is disposed to be separated from the front body 310. The suction grill 320 is closely attached to the front body 310, but no structural elements for assembling or coupling the front body 310 and the suction grill 320 are disposed.

The suction grill 320 is pulled by a string to be closely attached to the front body 310, and may be lowered or raised according to the operation of the lifter 500.

The suction grill 320 may be raised or lowered in the up and down direction of the front body 310 by the lifter 500. The suction grill 320 covers the entire suction port 101.

The elevator 500 and the suction grill 320 are connected by four wires, and the elevator 500 moves the suction grill 320 in the up-down direction by winding or unwinding the wires.

In the present embodiment, the suction grill 320 is formed with a plurality of grill holes 321 in a lattice shape. The grill holes 321 communicate with the suction port 101.

A pre-filter 330 is disposed at an upper side of the suction grill 320. The pre-filter 330 filters air sucked into the interior of the housing 100. The pre-filter 330 is positioned at an upper side of the grill holes 321, and filters air passing through the suction grill 320.

The discharge port 102 is formed in the form of a long slit along the edge of the suction port 101. The vane module 200 is positioned on the discharge opening 102 and coupled to the front body 310.

In this embodiment, the blade module 200 may be separated toward the lower side of the front body 310. That is, the blade module 200 is configured independently of the coupling structure of the front body 310, and can be independently separated from the front body 310. The structure relating to this will be described in more detail later.

< construction of front body >

The front body 310 is coupled to a lower side of the case housing 110 and is disposed to face an indoor direction. The front body 310 is disposed at a ceiling of a room and is exposed to the room.

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 the load of the suction grill 320 and the pre-filter 330.

The front body 310 is formed in a quadrangular shape in a plan view. The shape of the front body 310 may be formed in various ways.

The upper side of the front body 310 is formed in a horizontal manner so as to be closely attached to the ceiling, and the edge of the lower side of the front body 310 may be formed in a slightly curved surface.

A suction port 101 is disposed at the center of the front body 310, and a plurality of discharge ports 102 are disposed outside the edge of the suction port 101.

The suction port 101 may be formed in a square shape and the discharge port 102 may be formed in a rectangular shape in a plan view. The discharge port 102 may be formed in a slit shape having a longer length than a width.

The front body 310 includes a front frame 312, side covers 314, and corner covers 316.

The front frame 312 provides load and rigidity to the front panel 300 and is fastened to the housing case 110. The suction port 101 and four discharge ports 102 are formed in the front frame 312.

In the present embodiment, the front frame 312 includes a side frame 311 and a corner frame 313.

The corner frame 313 is disposed at each corner of the front panel 300. The side frame 311 is combined with two corner frames 313. The side frame 311 includes an inner side frame 311a and an outer side frame 311 b.

The inner frame 311a is disposed between the suction port 101 and the discharge port 102, and is used to couple the two corner frames 313. The outer frame 311b is disposed outside the discharge port 102.

In the present embodiment, four inner side frames 311a and four outer side frames 311b are provided.

The suction port 101 is located inside the four inner side frames 311 a. The discharge port 102 is formed by being surrounded by two corner frames 313, an inner frame 311a, and an outer frame 311 b.

In addition, the side cover 314 and the corner cover 316 are coupled to the bottom surface of the front frame 312. The side covers 314 and corner covers 316 are exposed to the user and the front frame 312 is not visible to the user.

The side covers 314 are disposed at edges of the front frame 312, and the corner covers 316 are disposed at corners of the front frame 312.

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.

In the present embodiment, four side covers 314 and four corner covers 316 are respectively provided. The side covers 314 and corner covers 316 are coupled to the front frame 312 and connected as a combination. In the front panel 300, four side covers 314 and four corner covers 316 form one edge.

The side cover 314 is disposed under the side frame 311, and the corner cover 316 is disposed under the corner frame 313.

Four side covers 314 and four corner covers 316 are assembled to form a quadrangular frame. The four side covers 314 and the four corner covers 316 connected are defined as front decos 350.

The front trim piece 350 forms a trim piece outer boundary (351, outer border) and a trim piece inner boundary (352, inner border).

The garnish outer boundary 351 is formed in a quadrilateral shape in a plan view or a bottom view, and the garnish inner boundary 352 is also formed in a quadrilateral shape as a whole. Instead, the corners of the interior boundaries of the trim piece form a defined curvature.

The suction grill 320 and the four blade modules 200 are arranged inside the trim inner boundary 352. In addition, the suction grill 320 and the four blade modules 200 are disposed in contact with the ornament inner boundary 352.

In the present embodiment, four side covers 314 are arranged, and each side cover 314 is coupled to the front frame 312. The outer edge of the side cover 314 forms part of the trim outer boundary 351 and the inner edge forms part of the trim inner boundary 352.

In particular, the inside edge of the side cap 314 forms the outside boundary of the discharge orifice 102. The inside edge of the side cover 314 is defined as a side trim inner boundary 315.

In this embodiment, the corner cover 316 is configured with four, and each corner cover 316 is coupled to the front frame 312. The outside edge of the corner cover 316 forms part of the trim outer boundary 351 and the inside edge forms part of the trim inner boundary 352.

The inside edge of the corner cover 316 is defined as a corner trim inside boundary 317.

The corner garnish inner boundary 317 may be disposed in contact with the suction grill 320. In this embodiment, the inner edges of the corner covers 316 are disposed to face the suction grill 320, and are spaced apart from each other at predetermined intervals to form gaps 317 a.

The side garnish inner boundary 315 is similarly disposed to face the outer edge of the blade module 200 with a gap 315a formed at a predetermined interval from the blade module 200.

Thus, the garnish inner boundary 352 forms a continuous gap with a predetermined interval from the outer edges of the four blade modules 200 and the suction grill 320.

A continuous gap formed by the four side deco inner boundary gaps 315a and the four corner deco inner boundary gaps 317a is defined as a front deco gap 350 a.

The front garnish gap 350a is formed at an inner edge of the front garnish 350. Specifically, the front garnish gap 350a is formed by separating the outer edges of the blade module 200 and the suction grill 320 from the inner edge of the front garnish 350.

When the vane module 200 is not in operation (when the indoor unit is stopped), the front garnish gap 350a allows the suction grill 320 and the vane module 200 to be viewed as a single structure.

< construction of suction grill >

The suction grill 320 is positioned at the lower side of the front body 310. The suction grill 320 may be lifted downward in a state of being closely attached to the bottom surface of the front body 310.

The suction grill 320 includes: a grill main body 322; a plurality of grill holes 321 penetrating the grill body 322 in the up-down direction; a string fixing part 329 formed on the grill body 322, and the other end of the string is fixed to the string fixing part 329; a filter coupling portion 331, and the pre-filter 330 is detachably assembled to the filter coupling portion 331.

The suction grill 320 includes: a grill main body 322 disposed below the suction port 101, communicating with the suction port 101 through a plurality of grill holes 321, and formed in a quadrangular shape; and a grill corner portion 327 formed to extend in a diagonal direction from a corner of the grill main body 322.

The bottom surface of the grill body 322 and the bottom surface of the blade 210 may form a continuous surface. Also, the bottom surface of the grill main body 322 and the bottom surface of the corner cover 316 may form a continuous surface.

A plurality of grids 323 are arranged in a grid pattern inside the grid body 322. The lattice-shaped grating 323 forms a quadrangular lattice hole 321. The portion where the grill 323 and the grill holes 321 are formed is defined as a suction portion.

The grill main body 322 includes: a grill 323 formed with a plurality of grill holes 321; and a grill body 324 disposed along an edge of the grill 323 so as to surround the grill 323. The suction portion is formed in a quadrangular shape as a whole when viewed from above or from below.

The pre-filter 330 is positioned at an upper side of the suction part and covers the suction part.

The corners of the suction part are disposed toward the corners of the front panel 300, and more particularly, toward the corner cover 316.

The grill main body 322 is formed in a quadrangular shape when viewed from below.

The outer edge of the grill main body 324 is disposed to face the discharge opening 102 or the front garnish 350.

The outer side edge of the grill main body 324 includes: a grill corner border 326 disposed in a manner to face the corner cover 316; a grill side edge 325 that forms the discharge port 102 and is disposed so as to face the side cover 314.

The grill corner boundaries 326 may be formed with a curvature centering on the inner side of the suction grill 320, and the grill side boundaries 325 may be formed with a curvature centering on the outer side of the suction grill 320.

The grill body 324 also includes a grill corner 327 surrounded by the grill corner border 326 and two grill side borders 325. The grill corner portion 327 is formed to protrude from the grill main body portion 324 toward the corner cover 316.

The grill corner portions 327 are disposed at respective corners of the grill main body 322. The grill corner portion 327 extends toward each corner of the front panel 300.

In the present embodiment, four grid edge portions 327 are provided. For convenience of description, the four grill corner portions 327 are defined as a first grill corner portion 327-1, a second grill corner portion 327-2, a third grill corner portion 327-3, and a fourth grill corner portion 327-4.

The grill side boundary 325 is formed in a shape recessed from the outside to the inside.

The discharge opening 102 is formed between the side cover 314 and the suction grill 320. More specifically, a discharge opening 102 is formed between the side garnish inner boundary 315 of the side cover 314 and the grill side boundary 325 of the grill body 322. The discharge ports 102 are formed between the side garnish inner boundaries 315 and the grill side boundaries 325 disposed in the four directions of the suction grill 320.

In the present embodiment, the length of the grill corner border 326 and the corner trim inner border 317 are configured to face each other. In addition, the length of the grill corner border 326 is the same as the length of the corner trim inner border 317. That is, the width of the corner cover 316 and the width of the grill corner portion 327 are formed identically. The inner width of the side cover 314 and the width of the grill side boundary 325 are formed to be the same.

The grid side boundaries 325 are distinguished in more detail as follows.

The grill side boundary 325 forms an inside boundary of the discharge opening 102. The side trim interior boundaries 315 and corner trim interior boundaries 317 form the outer boundaries of the spout 102.

The grid side boundary 325 includes: a long linear segment 325a extending long in the longitudinal direction of the discharge port 102 and formed in a straight line; a first curved section 325b connected to one side of the long straight section 325a and having a center of curvature formed at an outer side of the suction grill 320; a second curved section 325c connected to the other side of the long straight section 325a and having a center of curvature formed at the outside of the suction grill 320; a first short straight line segment 325d connected to the first curved line segment 325 b; and a second short straight line segment 325e connected to the second curved line segment 325 c.

A discharge port 102 is formed between the grill side boundary 325 and the side garnish inner boundary 315, and a blade module 200 is disposed in each discharge port 102.

The inner edge 210a of the blade 210 of the blade module 200 is disposed to face the grill side boundary 325, and the outer edge 210b of the blade 210 is disposed to face the side garnish inner boundary 315.

A discharge port 102 is formed between the grill side boundary 325 and the side garnish inner boundary 315, and a blade module 200 is disposed in each discharge port 102.

The inner edge 210a of the blade 210 of the blade module 200 is disposed to face the grill side boundary 325, and the outer edge 210b of the blade 210 is disposed to face the side garnish inner boundary 315.

A string fixing portion 329 for fixing the other end of the string protrudes upward from the grill main body 324. Four wire fixing portions 329 are provided corresponding to the wires 511, 512, 521, and 522.

A string fixing part fixing the other ends of the 1-1 st string 511 is defined as a first string fixing part 329-1, a string fixing part fixing the other ends of the 1-2 st string 512 is defined as a second string fixing part 329-2, a string fixing part fixing the other ends of the 2-1 st string 521 is defined as a third string fixing part 329-3, and a string fixing part fixing the other ends of the 2-2 nd string 522 is defined as a fourth string fixing part 329-4.

The first cord fixing portion and the second cord fixing portion are symmetrical with respect to the motor shaft 541 direction of the first unit when viewed from above or from above. The third wire fixing portion and the fourth wire fixing portion are symmetrical with respect to the motor shaft 541 direction of the second unit when viewed from above or from above.

The arrangement directions of the first wire rope fixing part and the second wire rope fixing part are parallel to the arrangement directions of the third wire rope fixing part and the fourth wire rope fixing part.

In the present embodiment, the first string fixing portion is located on the first grid corner portion 327-1 side, the second string fixing portion is located on the second grid corner portion 327-2 side, the third string fixing portion is located on the third grid corner portion 327-3 side, and the fourth string fixing portion is located on the fourth grid corner portion 327-4 side.

The string fixing portion 329 is disposed outside the pre-filter 330 and in the grill body 322. Each cord fixing part protrudes upward from the upper side of the grill body 322.

The filter coupling portion 331 is a structural element for fixing 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.

In the present embodiment, the filter coupling portion 331 has a structure surrounding the edge of the pre-filter 330. The filter coupling portion 331 may be disposed outside the grill 323 and along the edge of the suction port 101 or the suction portion.

The filter coupling portion 331 protrudes upward from the upper surface of the grill body 324, and forms a space capable of accommodating the pre-filter 330 with the upper surface of the grill body 324.

< construction of Pre-Filter >

The pre-filter 330 is disposed on the upper side of the suction grill 320. The pre-filter 330 filters impurities having a large volume from the air sucked through the suction port 101.

The pre-filter 330 is disposed above the grill 323 and covers the entire suction unit.

The pre-filter 330 is detachably assembled to the suction grill 320, and descends together with the suction grill 320 when the suction grill 320 descends.

< construction of Elevator >

The lifter 500 may raise or lower the suction grill 320 by simultaneously winding or unwinding four cords 511, 512, 521, 522. The user can operate the lifter 500 by inputting an operation signal to the control part.

The lifter 500 is controlled by the control unit. The lifter 500 supports the suction grill 320 at four points. The lifter 500 supports the suction grill 320 by four cords 511, 512, 521, 522, and raises or lowers the suction grill 320 by winding or unwinding the cords.

The lifter 500 is operated to simultaneously wind or unwind the four cords 511, 512, 521, 522, thereby enabling the suction grill 320 to be raised or lowered in a horizontal state.

The lifter 500 includes a first unit 510 and a second unit 520.

The first unit 510 may simultaneously wind or unwind a pair of cords, and the second unit 520 may simultaneously wind or unwind a pair of cords.

A pair of cords connected to the first unit 510 are defined as a 1 st-1 st cord 511 and a 1 st-2 st cord 512, and a pair of cords connected to the second unit 520 are defined as a 2 nd-1 st cord 521 and a 2 nd-2 nd cord 522.

The first unit 510 may simultaneously wind or unwind the 1-1 st string 511 and the 1-2 st string 512. The second unit 520 may simultaneously wind or unwind the 2-1 st wire 521 and the 2-2 nd wire 522.

One end of the 1 st to 1 st string 511 and one end of the 1 st to 2 nd string 512 are coupled to the first unit 510, and the other end of the 1 st to 1 st string 511 and the other end of the 1 st to 2 nd string 512 are coupled to one side of the suction grill 320.

One end of the 2-1 st wire 521 and one end of the 2-2 nd wire 522 are coupled to the second unit 520, and the other end of the 2-1 st wire 521 and the other end of the 2-2 nd wire 522 are coupled to the other side of the suction grill.

When the 1 st-1 wire 511 and the 1 st-2 wire 512 are disposed on the left side, the 2 nd-1 wire 521 and the 2 nd-2 wire 522 are disposed on the right side. In contrast, when the 1 st to 1 st wire 511 and the 1 st to 2 nd wire 512 are disposed on the front side, the 2 nd to 1 st wire 521 and the 2 nd to 2 nd wire 522 are disposed on the rear side.

Referring to fig. 5, the 1 st-1 st wire 511 and the 1 st-2 st wire 512 are positioned on the left side and arranged in the front-rear direction, and the 2 nd-1 st wire 521 and the 2 nd-2 nd wire 522 are positioned on the right side and arranged in the front-rear direction.

The 1 st-1 st cord 511 and the 1 st-2 st cord 512 are arranged in a row and the 2 nd-1 st cord 521 and the 2 nd-2 nd cord 522 are also arranged in a row in a bottom view or a top view.

The 1 st-1 wire 511 and the 2 nd-1 wire 521 are disposed in parallel, and the 1 st-2 wire 512 and the 2 nd-2 wire 522 are disposed in parallel.

The first cell 510 and the second cell 520 are symmetrically arranged with respect to each other. When the first unit 510 is disposed on the left side of the housing 100, the second unit 520 is disposed on the right side of the housing 100. Similarly, when the first unit 510 is disposed on the front side of the housing 100, the second unit 520 is disposed on the rear side of the housing 100.

In the present embodiment, the first unit 510 is disposed on the left side of the housing 100, and the second unit 520 is disposed on the right side of the housing 100.

The lifter 500 provides a structure for raising or lowering the suction grill 320 in a horizontal state by simultaneously winding or simultaneously unwinding four cords.

Since the structural elements 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.

< construction of first Unit >

The first unit 510 includes: a roller 530, wherein one end of a 1 st-1 st cord 511 and one end of a 1 st-2 nd cord 512 are respectively fixed on the roller 530; a roller motor 540 for rotating the roller 530; a first roller housing 550, the 1 st-1 wire 511 being disposed through the first roller housing 550, the first roller housing 550 being adapted to align the position of the 1 st-1 wire 511 when the 1 st-1 wire 511 is wound or unwound; a second roller housing 560, the 1 st-2 string 512 being disposed through the second roller housing 560, the second roller housing 560 being adapted to align the position of the 1 st-2 string 512 when the 1 st-2 string 512 is wound or unwound; a rotation amount sensing device 600 for sensing a rotation amount of the drum 530.

The first unit 510 may be disposed in one of the front body 310, the cabinet case 110, and the bell mouth 142.

The roll 530, the roll motor 540, the first roll case 550, and the second roll case 560 constituting the first unit 510 may be disposed at one of the front body 310, the cabinet case 110, and the bell mouth 142.

In the present embodiment, a unit case 590 forming the external appearance of the first unit 510 is provided for easy replacement and repair. Inside the unit case 590 are disposed a roll 530, a roll motor 540, a first roll housing 550, a second roll housing 560, and a rotation amount sensing device 600.

The unit case 590 may be disposed in one of the front body 310, the cabinet case 110, and the bell mouth 142. In this embodiment, the unit housing 590 is disposed at the bell mouth 142. The unit case 590 is disposed at an upper side of the suction grill 320.

When the unit shells need to be distinguished, the unit shell configured on the first unit is defined as a first unit shell, and the unit shell configured on the second unit is defined as a second unit shell.

< construction of roll >

The roll 530 includes: a drum body 535 formed in a cylindrical shape, and 1-1 st and 1-2 st cords 511 and 512 having one ends fixed to the drum body 535, respectively; a first portion 533 which is disposed to protrude outward in a radial direction of the drum body 535 and partitions a first region 531 in which the 1 st to 1 st cord 511 is wound and a second region 532 in which the 1 st to 2 nd cord 512 is wound; a 1-1 separator 534 disposed on the drum body 535 for preventing the 1-1 cord 511 wound in the first region 531 from being separated to the outside of the drum body 535; and 1-2 separators 536 disposed on the drum body 535 to prevent the 1-2 cord 512 wound in the second region 532 from being separated to the outside of the drum body 535.

The roller body 535 is formed in a cylindrical shape. Unlike the present embodiment, the roll body 535 may be formed in various forms. Grooves may be formed on the outer circumferential surface of the drum body 535 to facilitate alignment when the wire is wound. The grooves may be formed in a spiral pattern along the outer circumferential surface of the roller body 535.

The portion 533 is disposed in the middle with respect to the longitudinal direction of the roller body 535. The portion 533 is formed to protrude outward in the radial direction of the roller body 535. In this embodiment, the portion 533 is formed in a ring shape, and the center of the portion 533 is arranged on the same axis as the axial center C of the roller body 535. The ring shape is disposed to project in a radial direction along the outer circumferential surface of the roller body 535.

The axial center C of the roller body 535 is intersected by either the 1 st-1 st or 1 st-2 nd cords 511 or 512.

The portion 533 divides the outer circumferential surface of the roller body 535 into a first region 531 and a second region 532.

The 1 st-1 st wire 511 is positioned in the first area 531, and is wound or unwound in the first area 531. The 1 st-2 th cord 512 is positioned in the second area 532 and is wound or unwound in the second area 532.

Said portion 533 prevents the cords from crossing and winding outside the respective area.

The 1 st-1 separator 534 prevents the 1 st-1 st cord 511 wound on the first area 531 from being separated to the outside of the drum body 535. The 1-2 dividers 536 prevent the 1-2 cord 512 wound in the second region 532 from escaping outward of the drum body 535.

The 1 st to 1 st separators 534 are disposed to protrude outward in the radial direction of the roll main body 535. The 1 st to 2 nd separators 536 are disposed to protrude outward in the radial direction of the roller main body 535.

In this embodiment, the 1 st-1 st and 1 st-2 nd spacers 534 and 536 are formed in a ring shape formed along the outer circumferential surface of the drum main body 535. The ring shapes of the 1 st to 1 st spacers 534 and the 1 st to 2 nd spacers 536 are arranged to be convex in the radial direction along the outer circumference of the roller main body 535.

One end of the 1 st-1 st cord 511 is secured to the first region 531 and one end of the 1 st-2 st cord 512 is secured to the second region 532.

One end of the 1 st-1 st cord 511 may be secured to one of the drum body 535, the first portion 533, or the 1 st-1 st partition 534 forming the first area 531.

In this embodiment, one end of the 1 st to 1 st cord 511 is fixed to the outer circumferential surface of the drum body 535 in the first region 531. In addition, in this embodiment, one end of the 1 st-2 nd cord 512 is secured to the outer circumferential surface of the drum body 535 in the second region 532.

In order to sense the amount of rotation of the roll 530, a part of the structural elements of the rotation amount sensing device 600 may be disposed at the roll 530. A rotation sensing factor 601 is provided for sensing the amount of rotation of the roll 530. In this embodiment, the rotation sensing factors 601 are arranged at equal intervals in the circumferential direction with respect to the axial center C of the roll 530. The rotation sensing factor 601 may be disposed at least one of the 1 st-1 st partition 534 or the 1 st-2 nd partition 536.

< construction of roller Motor >

In the roller motor 540, a motor shaft 541 is assembled to the roller 530. The motor shaft 541 and the roller 530 have the same shaft center C. In this embodiment, the roller motor 540 uses a stepping motor.

Unlike the present embodiment, a gear may be provided in order to provide the rotational force of the roll motor 540 to the roll 530. The amount of rotation and the rotational speed of the roll 530 can be more precisely controlled by the combination of the gears.

The axial center C intersects with the arrangement directions of the 1 st-1 st wire 511 and the 1 st-2 nd wire 512. In the present embodiment, the axial center C is orthogonal to the arrangement direction of the 1 st-1 st wire 511 and the 1 st-2 nd wire 512.

One end of the 1 st-1 st string 511 and one end of the 1 st-2 st string 512 are symmetrical with respect to the axial center C.

To simultaneously wind or unwind 1-1 cord 511 and 1-2 cord 512, 1-1 cord 511 is wound up toward the upper side of drum body 535 and 1-2 cord 512 is wound up toward the lower side of drum body 535.

< construction of roll cassette >

The first and second roll cases 550 and 560 are disposed inside the unit case 590 of the first unit 510. The first and second roll cases 550 and 560 are also disposed inside the unit case 590 of the second unit 520.

First roller box 550 aligns 1-1 cord 511 in sequence on roller body 535 as the 1-1 cord 511 is wound or unwound in first region 531 of the roller 530.

When the 1 st-1 st cord 511 is wound around the outer circumferential surface of the drum 530 without forming a uniform layer, a difference is formed between the thickness of the cord and the length of the 1 st-2 nd cord 512.

In the case where the 1 st-1 st string 511 wound at the first area 531 and the 1 st-2 nd string 512 wound at the second area 532 form uneven layers, the suction grill 320 may be inclined with respect to the horizontal direction.

The second roll cassette 560 aligns the 1-2 cords 512 sequentially on the roll body 535 as the 1-2 cords 512 are wound or unwound in the second region 532 of the roll 530.

The first and second roll housings 550 and 560 are arranged symmetrically with respect to the intersection of the portion 533 and the central axis C in a plan view.

Since the first roll housing 550 and the second roll housing 560 have the same structural elements, the first roll housing 550 will be described as an example.

The first roll cassette 550 includes: a case 555 fixed to the unit case 590; a first roller 551 disposed inside the case 555, contacting the 1 st-1 st wire 511, rotating by friction when the 1 st-1 st wire 511 moves, and disposed farthest from the roller 530; a fourth roller 554 disposed inside the case 555, contacting the 1 st-1 st wire 511, rotating by friction when the 1 st-1 st wire 511 moves, and disposed closest to the drum 530; a second roller 552 which is disposed inside the housing 555, contacts the 1 st-1 st wire 511, rotates by friction when the 1 st-1 st wire 511 moves, is disposed between the first roller 551 and the fourth roller 554, and is movable in a horizontal direction by a tension of the 1 st-1 st wire 511; and a third roller 553 disposed inside the case 555, contacting the 1 st to 1 st wire 511, rotated by friction when the 1 st to 1 st wire 511 moves, disposed between the second roller 552 and the fourth roller 554, and movable in a horizontal direction by a tension of the 1 st to 1 st wire 511.

With the roll barrel 530, a first roller 551 is disposed at the farthest position, a second roller 552 is disposed at the next farthest position, a third roller 553 is disposed at the next farthest position, and a fourth roller 554 is disposed closest to the roll barrel.

The first roller 551, the second roller 552, the third roller 553, and the fourth roller 554 are assembled to the respective roller shafts 551a, 552a, 553a, 554a, and are rotatable about the respective roller shafts 551a, 552a, 553a, 554 a. The roller shafts 551a, 552a, 553a, 554a are arranged in the horizontal direction.

At least one of the first roller 551, the second roller 552, the third roller 553, and the fourth roller 554 may be rotated in a fixed state, and the remaining rollers may be moved along the roller shaft and rotated.

In the present embodiment, the first roller 551 is a fixed roller that does not move along the roller shaft. In the present embodiment, the first roller 551 rotates in a home position around the roller shaft 551a in a state of being assembled to the roller shaft 551 a.

The second roller 552, the third roller 553, and the fourth roller 554 are moving rollers that are movable in the horizontal direction along with the respective roller shafts. In the present embodiment, the second roller 552, the third roller 553, and the fourth roller 554 are rotatable in a state of being assembled to the respective roller shafts 552a, 553a, 554 a. When a force is applied to the second roller 552, the third roller 553, and the fourth roller 554 (e.g., a tension of the wire), the roller shafts 552a, 553a, and 554a can move. The rollers 552, 553, 554 are movable relative to each other.

The 1 st-1 st cords 511 are aligned in a row in the drum 530 by the relative movement of the second, third, and fourth rollers 552, 553, 554.

A cord guard 551b is disposed at a predetermined distance from the first roller 551. A 1 st-1 st cord 511 is disposed between the cord shroud 551b and the first roller 551. The cord guard 551b prevents the cord wound on the roller from being removed from the roller.

The second roller 552, the third roller 553, and the fourth roller 554 are also provided with cord guards 552b, 553b, 554b, respectively.

The first roller 551 located at the outermost side is excluded from moving in the axial direction, thereby preventing the axial movement of the wire. In the case where the first roller 551 located at the outer side moves along with the roller shaft 551a, the suction grill 320 may be deviated in height and the suction grill 320 may be shaken.

When winding or unwinding the cord, the first roller 551 may perform home-position rotation in the casing 555, and the second, third, and fourth rollers 552, 553, 554 move along with the respective roller shafts.

The first roller 551, the second roller 552, the third roller 553, and the fourth roller 554 are arranged in a zigzag (zigzag) pattern in an up-down direction.

The second roller 552 is disposed above the first roller 551, and the third roller 553 is disposed below the first roller 551, based on the first roller 551. The fourth roller 554 is disposed above the first roller 551 and the second roller 552 and below the third roller 553.

In particular, the second roller shaft 552a is located at the highest position, the third roller shaft 553a is located at the lowest position, the first roller shaft 551a is located at a higher position than the third roller shaft 553a, and the fourth roller shaft 554a is located at a higher position than the first roller shaft 551.

The fourth roller 554a is positioned above the center axis C, and the wire connecting the roller body 535 is disposed obliquely upward. Tension can be generated in the wire rope by the relative arrangement of the fourth roller shaft 554a and the central shaft C.

In order to reduce the lateral width of the roller box 550, the first roller 551, the second roller 552, the third roller 553, and the fourth roller 554 are arranged to overlap in the vertical direction.

That is, the interval between the first roller 551 and the third roller 553 is formed smaller than the diameter of the second roller 552. Meanwhile, the interval between the second roller 552 and the fourth roller 554 is formed smaller than the diameter of the third roller 553.

In this embodiment, the 1 st-1 st wire 511 will surround the lower outer circumferential surface of the first roller 551 and surround the upper outer circumferential surface of the fourth roller 554.

In addition, the second roll cassette 560 includes: a case 565 fixed to the unit housing 590; a first roller 561 and a fourth roller 564 disposed inside the casing 565, contacting the 1 st-2 nd string 512, and rotating by friction when the 1 st-2 nd string 512 moves; the second roller 562 and the third roller 563 are disposed inside the casing 565, contact the 1 st to 2 nd cords 512, rotate by friction when the 1 st to 2 nd cords 512 move, and are relatively movable in the axial direction by the tension of the 1 st to 2 nd cords 512.

The first roller 561, the second roller 562, the third roller 563, and the fourth roller 564 are respectively assembled to the roller shafts 561a, 562a, 563a, and 564a, and are rotatable about the roller shafts 561a, 562a, 563a, and 564 a.

The second roller box 560 is provided with wire guards 561b, 562b, 563b, and 564b spaced apart from the first roller 561, the second roller 562, the third roller 563, and the fourth roller 564 by a predetermined distance.

The first and second roll cases 550 and 560 are disposed in a bilaterally symmetrical manner with respect to the roll 530. In particular, the first and second roll housings 550 and 560 are arranged in a bilaterally symmetrical manner with respect to the shaft center C.

The first rollers 551, 561 may be disposed on the farthest sides and the fourth rollers 554, 564 may be disposed on the closest sides with respect to the shaft center C.

In this embodiment, one end of the 1 st-1 st cord 511 and one end of the 1 st-2 nd cord 512 are located on opposite sides of each other with respect to the axial center of the drum 530. With the rotation of drum 530, 1 st-1 st cord 511 and 1 st-2 st cord 512 are wound or unwound in the same direction on drum body 535.

The unit case 590 is formed in a box shape, and has a first hole 591 and a second hole 592 formed in side surfaces thereof.

The first hole 591 is disposed at one side of the unit housing 590, and the second hole 592 is disposed at the other side of the unit housing 590. For example, in the case where the first hole 591 is formed on the left side surface of the unit housing 590, the second hole 592 is formed on the right side surface of the unit housing 590.

The 1 st-1 st string 511 and the 1 st-2 st string 512 penetrate the unit case 590 in a horizontal direction.

< construction of cord guide >

A wire guide 700 is provided at the front body 310, and the wire guide 700 supports a wire when the wire is wound or unwound by the lifter 500. The cord guide 700 is arranged in four and corresponds to each of the cords 511, 512, 521, and 522.

The cord guide corresponding to the first cord 511 is defined as a first cord guide 701, the cord guide corresponding to the second cord 512 is defined as a second cord guide 702, the cord guide corresponding to the third cord 513 is defined as a third cord guide 703, and the cord guide corresponding to the fourth cord 514 is defined as a fourth cord guide 704.

The first cord guide 701 and the second cord guide 702 are disposed so as to face each other. The third wire rope guide 703 and the fourth wire rope guide 704 are arranged so as to face each other.

The first wire guide 701, the second wire guide 702, the third wire guide 703 and the fourth wire guide 704 are all located at the same height.

The first cord guide 701 and the second cord guide 702 are symmetrical with respect to the direction of the motor shaft 541 of the first unit when viewed from above or from below. The third wire guide 703 and the fourth wire guide 704 are symmetrical with respect to the direction of the motor shaft 541 of the second unit when viewed from above or from below.

The arrangement directions of the first and second cord guides 701 and 702 and the arrangement directions of the third and fourth cord guides 703 and 704 are parallel.

In this embodiment, a first cord guide 701 is located on the first side corner cover 316-1 side, a second cord guide 702 is located on the second side corner cover 316-2 side, a third cord guide 703 is located on the third side corner cover 316-3 side, and a fourth cord guide 704 is located on the fourth side corner cover 316-4 side.

In this embodiment, the cord guide 700 is disposed at the front body 310. The cord guide 700 protrudes from the front body 310 toward the lifter 500. Each cord guide 700 is disposed on the inner side 310a of the front body 310. The cord guide 700 is positioned between the roller box 550 and the front body 310. The cord guide 700 protrudes in a horizontal direction from the front body 310 toward the roller box 550.

The cord guide 700 is located at a position more upper than the suction grill 320 and at a position more lower than the bell mouth 142.

The cord guide 700 includes: a fixing block 710 disposed on the inner surface 310a of the front body 310 and protruding toward the roller housing 550; an assembling block 720 assembled with the fixing block 710; and a guide 750 disposed on the assembly block 720, and rotatably supporting the wire in the assembly block 720.

Although the cord guide 700 is constituted by the fixing block 710 and the assembling block 720 in the present embodiment, it may be constituted by a single block which is integrated, unlike the present embodiment. The one-piece block may be integrally manufactured with the front body 310, or may be additionally manufactured and assembled to the front body 310. However, in the case where the block is formed as one piece and is integrated with the front body 310, it is not easy to form the assembled block in the shape of the present embodiment by injection molding.

< construction of guide >

The guide 750 supports a cord. The guide 750 may rotate together with the wire when winding or unwinding the wire.

The guide 750 provides a structure that receives the cord and facilitates movement of the cord. The guide 750 may be formed in various forms, but is formed in a disk shape in the present embodiment.

The guide 750 includes: a guide body 752 formed with a rotation center along a horizontal direction; a string groove 754 that is disposed on an outer surface of the guide body 752 and is formed to be recessed toward the rotation center, and the string is inserted into and supported by the string groove 754; a guide shaft 755 rotatably assembled to the assembly block 720 through a rotation center of the guide body 752.

In the present embodiment, the guide body 752 is formed in a disk shape and is vertically arranged in the vertical direction. The guide body 752 rotates in a vertical direction, and a rotation center thereof is formed in a horizontal direction. The outer side surface 752a of the guide main body 752 is formed in a circular shape when viewed from the side.

The guide groove 754 is formed concavely from the outer side surface of the guide body 752 toward the rotation center. The guide groove 754 is formed in a ring shape along an outer side surface of the guide body 752.

The cord is inserted into the guide groove 754 and may use friction to create friction with the guide body 752. The guide body 752 may be rotated by friction of the wire and the guide body 752.

A guide shaft hole 753 through which the guide shaft 755 passes is formed at the rotation center of the guide body 752. The forming direction of the guide shaft hole 753 intersects with the forming direction of the guide groove 754.

In the present embodiment, the guide shaft 755 and the guide body 752 are assembled after being manufactured. Unlike the present embodiment, the guide shaft 755 and the guide body 752 may be integrally manufactured.

< construction of fixed Block >

In the present embodiment, the fixed block 710 is composed of two. Unlike the present embodiment, the fixing block 710 may be fabricated as one. In the present embodiment, the fixing block 710 is integrally manufactured with the front body 310. Unlike the present embodiment, the fixing block 710 may be additionally fabricated and assembled to the front body 310.

The fixing block 710 is composed of a first fixing block 711 and a second fixing block 712.

The first fixing block 711 and the second fixing block 712 are disposed along the horizontal direction and are symmetrical to each other. The first fixing block 711 and the second fixing block 712 are spaced apart from each other to form an insertion interval 713, and a guide 750 is disposed at the insertion interval 713.

The load applied to the guide 750 is supported by the first and second fixing blocks 711 and 712. Since the first fixing block 711 and the second fixing block 712 have the same configuration, the first fixing block 711 will be described as an example.

The first fixing block 711 includes: a fixed block main body 730; a fastening hole 735 penetrating the fixing block main body 730 in the up-down direction; a first insertion part 731 constituting the fixed block main body 730, protruding toward the lifter 500, inserted into the assembly block 720, and engaged with the assembly block 720 in a vertical direction; and a second insertion part 732 constituting the fixed block main body 730, protruding toward the lifter 500, inserted into the assembly block 720, and vertically engaged with the assembly block 720.

The first insertion part 731 and the second insertion part 732 are integrally formed. Upper surfaces of the first insertion portion 731 and the second insertion portion 732 form a continuous plane. The lower surfaces of first insertion portion 731 and second insertion portion 732 also form a continuous plane. That is, the upper side 711a and the lower side 711b of the first fixed block 711 are formed as planes, which are parallel to each other and arranged along the horizontal direction.

The first insertion portion 731 is disposed close to the insertion space 713, and the second insertion portion 732 is disposed close to the insertion space 713.

The first and second insertion parts 731 and 732 protrude in the horizontal direction and have different protruding lengths from each other. The first insertion portion 731 protrudes toward the lifter 500 side than the second insertion portion 732. That is, the protruding length of the first insertion part 731 is formed to be longer than the protruding length of the second insertion part 732.

In the present embodiment, since the first insertion part 731 has a larger volume than the second insertion part 732, the fastening hole 735 is formed in the first insertion part 731.

A surface protruding from the first insertion portion 731 toward the assembly block 720 is formed as a curved surface 731 a. The curved surface 731a is formed along the arrangement direction of the first and second insertion parts 731 and 732.

In the first fixing block 711, an inner side surface 711c forming an insertion space 713 and an outer side surface 711d distant from the insertion space 713 are formed in parallel with each other. The inner surface 711c and the outer surface 711d are perpendicular to the upper surface 711 a.

The upper surfaces 711a and 712a of the first fixing block 711 and the second fixing block 712 are disposed on the same plane, and the lower surfaces 711b and 712b are also disposed on the same plane.

The insertion space 713 is formed between the inner side surfaces 711c and 712c of the first fixing block 711 and the second fixing block 712. Inner surfaces 711c and 712c of the first fixing block 711 and the second fixing block 712 are arranged parallel to each other in the vertical direction. The outer side surfaces 711d and 712d of the first fixing block 711 and the second fixing block 712 are arranged parallel to each other in the vertical direction.

The fastening holes 735 of the first and second fixing blocks 711 and 712 are parallel to each other with respect to the up-down direction.

A space 739 is formed between the first fixing block 711 and the inner side surface 310a of the front body 310. A space 739 is also formed between the second fixing block 712 and the inner side surface 310a of the front body 310. The spaces 739 are formed in the vertical direction and penetrate the first fixing block 711 and the second fixing block 712. The strength of the fixing block can be improved by the space. The space 739 can suppress deformation that may occur during the generation of the fixing block.

The space 739 forms a first insertion leg 736 connecting the first insertion part 731 and the inner surface 310 a. The space 739 forms a second insertion leg 737 connecting the second insertion portion 732 and the inner surface 310 a.

< construction of Assembly Block >

The assembly block 720 has a structure surrounding the outer side surface of the fixing block 710. The fixing block 710 is inserted into the inside of the assembling block 720. The fixing block 710 and the assembling block 720 are assembled in a horizontal direction, and the fixing block 710 and the assembling block 720 are locked with each other in a vertical direction.

The assembling block 720 includes: an assembly block main body 740 in which the guide 750 is rotatably assembled to the assembly block main body 740, and a first block opening surface 721a and a second block opening surface 722a are formed on one side of the assembly block main body 740; a first insertion space 721 formed inside the assembly block main body 740 to be recessed inward of the first block open surface 721a, the first fixing block 711 being inserted into the first insertion space 721; a second insertion space 722 formed inside the assembly block body 740 and formed to be recessed inward of the second block open surface 721a, the second fixing block 712 being inserted into the second insertion space 722; a guide mounting space 742 formed outside the assembly block body 740 between the first and second insertion spaces 721 and 722, the guide 750 being inserted into the guide mounting space 742; guide shaft slots 744 and 746 formed outside the assembly block body 740 and supporting a rotation shaft of the guide 750; and fastening holes 745 formed through the inner and outer sides of the assembly block body 740, and fastening members are inserted into the fastening holes 745.

In the present embodiment, the first fixing block 711 is inserted into the first insertion space 721a, and the second fixing block 712 is inserted into the second insertion space 722 a. The first and second insertion spaces 721a and 722a are opened toward the inner side surface 310a of the front body 310 and protrude toward the lifter 500.

Unlike the present embodiment, one insertion space may be formed instead of the first and second insertion spaces 721a and 722 a. In the case where one insertion space is formed, the first fixing block and the second fixing block are inserted into one insertion space, and thus loose intervals may occur.

Since the cord guide 700 is a structure for supporting the cord, it is necessary to minimize a loose interval or shaking thereof. When the guide 750 is shaken while supporting the string, not only the operating noise is generated, but also a greater shaking occurs in the suction grill 320 supported by the string.

The first and second insertion spaces 721a and 722a are formed in a horizontal direction. Only one side of the assembly block body 740 is open, and the rest is closed.

A guide attachment space 742 and guide shaft grooves 744 and 746 are formed on the outer surface of the assembly block body 740.

The guide attachment space 742 is formed in the horizontal direction, and has a front-rear width smaller than a vertical thickness. The guide mounting space 742 is formed by a first guide mounting wall 742a, a second guide mounting wall 742b, and a third guide mounting wall 742 c.

The first guide attachment wall 742a and the third guide attachment wall 742c are disposed to face each other, and the second guide attachment wall 742b connects the first guide attachment wall 742a and the third guide attachment wall 742 c. The second guide attachment wall 742b intersects the first guide attachment wall 742a and the third guide attachment wall 742c, and is orthogonal in this embodiment.

The first guide attachment wall 742a and the third guide attachment wall 742c are formed parallel to each other, and the guide 750 is inserted between the first guide attachment wall 742a and the third guide attachment wall 742 c. The interval between the first and third guide- piece mounting walls 742a and 742c is formed longer than the thickness of the guide 750.

An interval between the first guide mounting wall 742a and the third guide mounting wall 742c is formed narrower than the insertion interval 713 between the first fixing block 711 and the second fixing block 712.

The guide attachment space 742 has a vertical length smaller than the diameter of the guide 750, and the guide 750 protrudes above and below the guide attachment space 742.

Although the first guide mounting wall 742a and the third guide mounting wall 742c are formed flat in the up-down direction, the second guide mounting wall 742b is not.

An upper side of the second guide mounting wall 742b may protrude toward the guide 750 side. In the present embodiment, the separation preventing protrusion 743 gradually protruding toward the guide 750 side is formed on the upper side of the second guide mounting wall 742 b.

The interval between the second guide mounting wall 742b and the guide body 752 is smaller than the diameter of the string, whereby the string can be prevented from being separated between the second guide mounting wall 742b and the guide body 752.

The separation preventing protrusions 743 are structural elements for preventing the guide body 752 from being unintentionally separated from the assembly block 720. When distinction is required and called, the separation preventing protrusions 743 are defined as first separation preventing protrusions.

The first separation preventing protrusion 743 protrudes from the second guide mounting wall 742b toward the guide 750 side. The first separation preventing protrusion 743 has a predetermined curvature and is spaced apart from the outer side surface 752a of the guide 750 by a predetermined interval.

In the present embodiment, the first separation preventing protrusions 743 formed at the assembly blocks are formed to surround the outer side surfaces of the guides 750, so that the separation of the string between the guide body 752 and the assembly blocks 720 can be prevented.

The distance between the first separation preventing protrusion 743 and the outer side surface 752a of the guide 750 is formed smaller than the diameter of the string, and thus the string can be separated to the outside of the guide 750 by being separated from the string groove 754. The cord disposed in the guide groove 754 is positioned between the second guide mounting wall 742b and the cord groove 754.

The center of curvature of at least a portion of the first separation preventing protrusion 743 may be disposed at the center of rotation of the guide shaft 755. The first separation preventing protrusion 743 is located at a position more upper than the rotation center of the guide shaft 755.

When the guide shaft 755 is inserted into the guide shaft grooves 744, 746, the outer side surface 752a of the guide body 752 may interfere with the first separation preventing protrusion 743. When the guide shaft 755 is inserted into the guide shaft grooves 744, 746, the guide body 752 is assembled with the separation preventing protrusions 743 in an interference fit form. After the guide shaft 755 is assembled, the outer surface 752a of the guide body 752 and the separation preventing protrusion 743 are kept spaced apart by a predetermined interval.

With the above-described configuration, when the operator does not intentionally separate the guide 750, the guide shaft 755 is locked by the separation preventing protrusion 743 and does not separate.

Further, the guide shaft grooves 744 and 746 are disposed on both sides of the guide mounting space 742, respectively. The first guide shaft groove 744 is disposed on the first guide mounting wall 742a side, and the second guide shaft groove 746 is disposed on the third guide mounting wall 742c side.

The first guide shaft groove 744 and the second guide shaft groove 746 are formed in a direction orthogonal to the direction in which the guide mounting space 742 is formed. The first guide shaft slot 744 and the second guide shaft slot 746 are symmetrical with respect to the guide mounting space 742.

The first guide shaft slot 744 and the second guide shaft slot 746 are concavely formed from the upper side to the lower side of the assembly block main body 740.

Since the second guide shaft groove 746 is symmetrical to the first guide shaft groove 744 in shape, the first guide shaft groove 744 will be described as an example.

Guide shaft slots 744, 746 include a first shaft wall 744a, a second shaft wall 744b, and a third shaft wall 744 c.

The first and third axial walls 744a and 744c are formed in parallel to each other. The guide shaft 755 of the guide 750 is inserted between the first shaft wall 744a and the third shaft wall 744 c. The first and third shaft walls 744a and 744c are formed to be spaced wider than the diameter of the guide shaft 755. The guide shaft 755 may rotate between the first and third shaft walls 744a, 744 c.

A separation preventing protrusion 747 for preventing the guide shaft 755 from being separated is provided. A structural element for preventing the guide shaft 755 from being separated from the guide shaft grooves 744, 746 is defined as a second separation prevention protrusion.

In the present embodiment, the second separation preventing protrusion 747 is disposed at two positions. The second separation prevention protrusion 747 includes: a 2-1 st separation prevention protrusion 747a protruding from the first shaft wall 744a toward the third shaft wall 744 c; a 2 nd-2 nd separation preventing projection 747c projects from the third shaft wall 744c toward the first shaft wall 744 a.

Unlike the present embodiment, only one of the 2 nd-1 st or 2 nd-2 nd detachment prevention projection 747a or 747c may be provided.

The interval between the 2 nd-1 st or 2 nd-2 nd anti-separation protrusions 747a or 747c is formed smaller than the diameter of the guide shaft 755. The 2 nd-1 st and 2 nd-2 nd detachment preventing protrusions 747a and 747c are located at the upper side than the rotation center of the guide shaft 755.

The 2 nd-1 st and 2 nd-2 nd separation preventing protrusions 747a and 747c surround a part of the outer side of the guide shaft 755. The arrangement direction of the 2 nd-1 st and 2 nd-2 nd separation preventing protrusions 747a and 747c crosses the length direction of the guide shaft 755.

The first and second separation preventing protrusions 743 and 747 not only prevent the guide from being separated from the assembly block 720, but also suppress the up-and-down movement of the guide 750.

The first and second separation preventing protrusions 743 and 747 limit the shaking and movement of the guide 750 during the operation of the lifter 500, thereby minimizing the operation noise generated during the rotation of the guide 750.

Since the first and second separation preventing protrusions 743 and 747 limit the shaking and moving of the guide 750, it is also possible to minimize the shaking of the suction grill 320 during the operation of the lifter 500.

In this embodiment, the string surrounds the upper side of the guide 750 and is converted in direction to the lower side. Therefore, the guide 750 will be pressed downward due to the load of the suction grill 320 loaded on the string. That is, since the guide 750 is pressed downward in the mounting state or during operation, the guide does not come off the guide mounting space 742 and the guide shaft grooves 744 and 746 without an intentional operation by the operator.

In the present embodiment, the guide member is easily attached by dividing the region into the fixed block and the assembly block. Unlike the present embodiment, a guide mounting structure may be formed on the fixed block and the guide may be mounted. For example, the guide mounting space and the guide shaft groove may be formed in the fixing block.

However, when the guide mounting space and the guide shaft groove are formed in the fixed block, the structure of the injection mold becomes complicated and the manufacturing becomes difficult.

< arrangement of cord securing part >

The string surrounds the guide 750 and is turned to the lower side, and is fixed to the suction grill 320.

One end of the string is fixed to the roller body 535 of the lifter 500 and the other end is fixed to the upper side of the suction grill 320.

A string fixing portion 329 to which the other end of the string is fixed is formed at the suction grill 320. The cord fixing portion 329 is disposed at the grill body 322 of the suction grill 320. In particular, the string fixing portion 329 is disposed on the grill body 324, in which the grill holes 321 are not formed, of the grill body 322, and protrudes upward.

The cord fixing portion disposed below the first cord guide 701 is defined as a first cord fixing portion, the cord fixing portion disposed below the second cord guide 702 is defined as a second cord fixing portion, the cord fixing portion disposed below the third cord guide 703 is defined as a third cord fixing portion, and the cord fixing portion disposed below the fourth cord guide 701 is defined as a fourth cord fixing portion.

The cord is extended downward in the vertical direction by the guide 750 and fixed to the cord fixing portion 329. The guide member 750 is located at an upper side of the grill main body portion 324.

The cord guide 700 of the present embodiment is positioned at an upper side of the suction grill 320 and is shielded by the suction grill 320. In particular, since the cord guide 700 is located on the upper side of the grill body 324, it is not exposed to the user.

The wire guide 700 is disposed closer to the suction port 101 side than the blade module 200. The blade module 200 has a structure capable of being separated from the front body 310 and prevents interference with a wire during separation of the blade module 200.

That is, the blade module 200 is located outside the four wires 511, 512, 521, and 522, and the operator can separate the blade module 200 while the four wires 511, 512, 521, and 522 are attached.

In addition, in the case of repairing or replacing the lifter 500, the operator may separate the four cords 511, 512, 521, and 522 regardless of the blade module 200 in a state in which the suction grill 320 is lowered.

< construction of rotation amount sensing device >

The rotation sensing device 600 is used for sensing the rotation amount of the roll 530. The rotation sensing device 600 needs to sense a rotation amount more accurate than the number of rotations of the roll 530.

In this embodiment, since it is necessary to simultaneously wind or unwind the 1 st-1 st and 1 st-2 st cords 511 and 512 of the first unit 510 and the 2 nd-1 st and 2 nd cords 521 and 522 of the second unit 520, it is necessary to accurately sense the amount of rotation of the drum 530.

Since the rotation sensing devices 600 of the first unit 510 and the second unit 520 have the same structural elements, the rotation sensing device 600 disposed on the first unit 510 will be described as an example.

The rotation sensing device 600 includes: a rotation sensing factor 601 disposed at the roll 530 and rotating together with the roll 530 when the roll 530 rotates; a sensor 602 disposed apart from the rotation sensing factor 601 and sensing a rotation amount of the rotation sensing factor 601; a printed circuit board 603, and the sensor 602 is disposed on the printed circuit board 603.

The rotation sensing factor 601 is configured to rotate with the roller 530 as it rotates. The rotation sensing factor 601 may be disposed at least one of the 1 st-1 st partition 534 or the 1 st-2 nd partition 536.

In this embodiment, a plurality of rotation sensing factors 601 are arranged, and the plurality of rotation sensing factors 601 are arranged at equal intervals in the circumferential direction with respect to the axial center C of the roll 530.

In the present embodiment, the rotation sensing factor 601 is disposed at the 1 st-1 st partition 534.

In the present embodiment, the rotation sensing factor 601 has a sawtooth shape. The rotation sensing factor 601 is disposed to protrude outward in the radial direction with reference to the axial center C of the roller 530.

The sensor 602 senses the rotation sensing factor 601. In this embodiment, the sensor 602 may use an infrared sensor or a photoelectric sensor. The sensor 602 senses the signal generated by the rotation sensing factor 601 upon rotation of the drum 530. For example, the sensor 602 generates infrared rays, and receives the generated infrared rays. The sensor 602 can determine the rotation angle, the number of rotations, and the rotation speed of the roller 530 by the change of the infrared ray blocked by the rotation sensing factor 601 when the roller 530 rotates.

In order to effectively sense the rotation sensing factor 601, a sensor mounting portion 604 is provided projecting from the printed circuit board 603.

The printed circuit board 603 is arranged in parallel with the axis center C. The printed circuit board 603 is disposed at one of the roll motor 540, the unit case 590, or the roll cassette.

In this embodiment, the printed circuit board 603 is disposed on the roller motor 540 and is disposed in parallel with a motor shaft of the roller motor 540.

The sensor mounting portion 604 is disposed to protrude from the printed circuit board 603 toward the roller 530. In the present embodiment, the sensor mounting portion 604 and the printed circuit board 603 are arranged in an orthogonal manner.

The sensor 602 is provided in the sensor mounting portion 604. The sensor 602 includes: a light emitting part for generating an infrared signal; and a light receiving part for receiving the infrared signal generated from the light emitting part. The operation mechanism of the sensor 602 is conventional to those skilled in the art, and thus a detailed description thereof will be omitted.

However, the sensor mounting portion 604 and the printed circuit board 603 for effectively identifying the rotation sensing factor 601 have structural features.

The sensor mounting portion 604 is formed in a shape of "Contraband" in a plan view.

The sensor mounting portion 604 is formed with a slot 605 through which the rotation sensing factor 601 can pass. Upon rotation of the roll 530, the rotation sensing factor 601 passes through the slot 605, and the sensor 602 senses the rotation sensing factor 601 passing through the slot 605.

The slots 605 are orthogonal to the axial center of the roller 530. The slot 605 is located on the rotation plane of the rotation sensing factor 601.

In the present embodiment, since the rotation sensing factor 601 is disposed on the 1 st-1 st partition 534, at least a portion of the slot 605 and the 1 st-1 st partition 534 are located on the same plane.

The slot 605 is arranged in parallel with the 1 st-2 nd dividers 536 and the portion 533.

The sensor mounting portion 604 may be a structure to which only the sensor 602 is simply mounted. In contrast, the sensor mounting portion 604 may be formed of a printed circuit board capable of supplying power to the sensor 602. Thereby, the printed circuit board 603 and the sensor mounting portion 604 can be electrically connected.

Unlike the present embodiment, a permanent magnet may be used as the rotation sensing factor, and the sensor uses a hall sensor that senses the permanent magnet. In the case of using a permanent magnet as the rotation sensing factor, a plurality of permanent magnets may be arranged along the edge of the 1 st-1 st spacer 534 in the circumferential direction.

Unlike the present embodiment, the rotation sensing factor 601 may also be configured at the 1 st-2 nd partition 536 or the portion 533.

Since the second unit 520 is constructed identically to the first unit 510, a detailed description will be omitted.

< arrangement of vane module and suction grill >

When the suction grill 320 is lowered, the four blade modules 200 and the lifters 500 are exposed. Since the respective strings are maintained in a state of being pulled upward, the suction grill 320 is maintained in a state of being closely attached to the front body 310.

When the suction grill 320 moves downward, the four blade modules 200 and the lifter 500, which are shielded by the suction grill 320, are exposed.

In a state where the suction grill 320 is closely attached to the front body 310, only the blades 210 of the blade module 200 are exposed.

Further, cord guides are arranged above the grill corners 327 constituting the suction grill 320.

The suction grill 320 includes: a grill main body 322 communicating with the suction port 101 through a plurality of grill holes 321 and formed in a quadrangular shape; a first grill corner portion 327-1, a second grill corner portion 327-2, a third grill corner portion 327-3, and a fourth grill corner portion 327-4, which are formed to extend in a diagonal direction from each corner of the grill main body 322.

The blade module 200 includes: a first vane module 201 disposed outside each edge of the suction grill 320 and between the first grill corner portion 327-1 and the second grill corner portion 327-2; a second vane module 202 disposed outside each edge of the suction grill 320 and between the second grill corner portion 327-2 and the third grill corner portion 327-3; a third vane module 203 disposed outside each edge of the suction grill 320 and between the third grill corner portion 327-3 and the fourth grill corner portion 327-4; and a fourth vane module 204 disposed outside each edge of the suction grill 320 and between the fourth grill corner portion 327-4 and the first grill corner portion 327-1.

The blade module 200 disposed in the 12-point direction is defined as a first blade module 201, the blade module 200 disposed in the 3-point direction is defined as a second blade module 202, the blade module 200 disposed in the 6-point direction is defined as a third blade module 203, and the blade module 200 disposed in the 9-point direction is defined as a fourth blade module 204.

The first blade module 201, the second blade module 202, the third blade module 203, and the fourth blade module 204 are arranged at 90-degree intervals with reference to the center C of the front panel 300.

The first blade module 201 and the third blade module 203 are arranged in parallel, and the second blade module 202 and the fourth blade module 204 are arranged in parallel.

Four side covers 314 are disposed at the front body 310. For convenience of description, the side cover 314 disposed outside the first blade module 201 is defined as a first side cover 314-1, the side cover 314 disposed outside the second blade module 202 is defined as a second side cover 314-2, the side cover 314 disposed outside the third blade module 203 is defined as a third side cover 314-3, and the side cover 314 disposed outside the fourth blade module 204 is defined as a fourth side cover 314-4.

Each side cover 314 is assembled to an edge of the front frame 312, is positioned below the front frame 312, is exposed to the outside, and is disposed outside each blade module 202.

Further, a corner cover 316 disposed between the first blade module 201 and the second blade module 202 is defined as a first corner cover 316-1. A corner cover 316 disposed between the second blade module 202 and the third blade module 203 is defined as a second corner cover 316-2. A corner cover 316 disposed between the third blade module 203 and the fourth blade module 204 is defined as a third side corner cover 316-3. A corner cover 316 disposed between the fourth blade module 204 and the first blade module 201 is defined as a fourth corner cover 316-4.

The first side cover 316-1 is assembled to the corner of the front frame 312, is positioned at the lower side of the front frame 312, is positioned between the first and second side covers 314-1 and 314-2, and is exposed to the outside.

The second corner cover 316-2 is assembled to the corner of the front frame 312 at the lower side of the front frame 312 between the second and third side covers 314-2 and 314-3 and is exposed to the outside.

The third side corner cover 316-3 is assembled to the corner of the front frame 312, is positioned at the lower side of the front frame 312, is positioned between the third and fourth side covers 314-1 and 314-4, and is exposed to the outside.

The fourth corner cover 316-4 is assembled to the corner of the front frame 312, is positioned at the lower side of the front frame 312, is positioned between the fourth side cover 314-1 and the first side cover 314-1, and is exposed to the outside.

The first side flap 316-1 and the third side flap 316-3 are disposed along the diagonal direction with reference to the center O of the front panel 300, and are disposed to face each other. The second and fourth corner covers 316-2 and 316-4 are disposed in a diagonal direction with respect to the center O of the front panel 300 and face each other.

Virtual diagonal lines passing through the center of the front panel 300 are defined as P1 and P2. P1 is a 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.

A first grill corner portion 327-1, a second grill corner portion 327-2, a third grill corner portion 327-3, and a fourth grill corner portion 327-4 extending to the corner sides are disposed at the suction panel 320.

The first vane module 201 is disposed outside each edge of the suction grill 320 with respect to the grill edge part, and is disposed between the first grill edge part 327-1 and the second grill edge part 327-2.

The second vane module 202 is disposed outside each edge of the suction grill and between the second grill corner portion 327-2 and the third grill corner portion 327-3.

The third vane module 203 is disposed outside each edge of the suction grill and between the third grill corner portion 327-3 and the fourth grill corner portion 327-4.

The fourth vane module 204 is disposed outside each edge of the suction grill and between the fourth grill corner portion 327-4 and the first grill corner portion 327-1.

The first grid edge portion 327-1 is formed to extend toward the first edge cover 316-1, and forms a continuous surface with the outer side surface of the first edge cover 316-1.

The grill corner border 326 of the first grill corner portion 327-1 faces the corner trim inner border 317 of the first corner cover 316-1 and forms a corner trim inner border gap 317 a.

The grid corner borders 326 of the remaining grid corner portions 327 and the corner trim inner borders 317 of the corner covers 316 also face each other, respectively, and form respective corner trim inner border gaps 317 a.

The suction grill 320 is formed with four grill corner portions 327 arranged to face the respective corner covers 316. Each of the grid corner portions 327 is disposed opposite each of the corner covers 316.

A grid corner portion 327 disposed to face the first corner cover 316-1 is defined as a first grid corner portion 327-1, a grid corner portion 327 disposed to face the second corner cover 316-2 is defined as a second grid corner portion 327-2, a grid corner portion 327 disposed to face the third corner cover 316-3 is defined as a third grid corner portion 327-3, and a grid corner portion 327 disposed to face the fourth corner cover 316-4 is defined as a fourth grid corner portion 327-4.

The grill side boundary 325 forming the edge of the grill corner portion 327 and the corner garnish inner boundary 317 forming the inner edge of the corner cover 316 are disposed to face each other, and the curved shapes also correspond to each other.

Similarly, the grid corner boundaries 326 forming the edges of the grid corner portions 327 and the inner edges of the blades 210 are arranged so as to face each other, and the curved shapes also correspond to each other.

In the present embodiment, a permanent magnet 318 and a magnetic fixing portion 328 are disposed to maintain the suction grill 320 in a state of being closely attached to the front body 310.

One of the permanent magnet 318 or the magnetic fixing portion 328 may be disposed on the front body 310, and the other of the magnetic fixing portion 328 or the permanent magnet 318 may be disposed on the upper side of each of the grill corner portions 327.

The permanent magnet 318 and the magnetic fixing portion 328 are located above the respective grid edge portions 327 and hidden by the respective grid edge portions 327. Since the permanent magnets 318 and the magnetic fixing portions 328 are located outside the respective corners of the suction grill 320, it is possible to minimize the suction grill 320 and the front main body 310 from being spaced apart.

If the suction grill 320 and the front body 310 are spaced apart from each other, a problem occurs in that the pressure inside the suction flow path 103 is reduced.

In the present embodiment, the permanent magnet 318 is disposed on the front body 310. Specifically, the permanent magnet is disposed in the corner frame 313.

The magnetic fixing portion 328 is formed of a metal material that interacts with the permanent magnet 318 to form an attractive force. The magnetic fixing portion 328 is disposed on an upper side surface of the suction grill 320. Specifically, the magnetic fixing portion 328 is disposed on the upper side surface of the grill corner portion 327.

In case that the suction grill 320 moves to the upper side and approaches the permanent magnet 318, the permanent magnet 318 pulls the magnetic fixing portion 328 to fix the suction grill 320. The magnetic force of the permanent magnet 318 is smaller than the self weight of the suction grill 320. Accordingly, when the suction grill 320 cannot be pulled by the lifter 500, the permanent magnet 318 and the magnetic fixing portion 328 are disengaged from each other.

The permanent magnets 318 are arranged on the virtual diagonal lines P1 and P2 when viewed from above or from below. The permanent magnet 318 is located inside the corner cover 316.

One of the four permanent magnets 318 is disposed between the first module body 410 of the first blade module 201 and the second module body 420 of the fourth blade module 204 when viewed from above or from below. The remaining three permanent magnets are also disposed between the first module body 410 and the second module body 420 of each blade module.

The permanent magnet 318 and the magnetic fixing portion 328 are located above the respective grid edge portions 327 and hidden by the respective grid edge portions 327.

Hereinafter, the operation of the suction grill according to the embodiment of the present invention when it is raised or lowered will be described in more detail.

First, the installation state of the suction grill 320 will be described in more detail.

The suction grill 320 may be lowered for filter cleaning, indoor unit interior repair, or the like. The suction grill 320 is supported by the four wires 511, 512, 521, and 522, and all the load of the suction grill 320 is applied by the four wires 511, 512, 521, and 522.

The suction grill 320 is held in close contact with the front body 310 by four cords 511, 512, 521, and 522. That is, the suction grill 320 and the front body 310 are not provided with an additional coupling structure for support.

Accordingly, the user does not need to stand above a structure such as a chair and disassemble the assembly of the suction grill 320 and the front body 310 in order to separate the suction grill 320. That is, when the four cords 511, 512, 521, and 522 are unwound by the operation of the lifter 500, the suction panel 320 immediately descends downward.

Further, since the suction grill 320 is supported only by the respective strings 511, 512, 521, and 522, the respective strings 511, 512, 521, and 522 always form a tight tension. In the case where the suction grill 320 is supported by other structures, a portion of each of the cords 511, 512, 521, 522 may be in a loose state, and the lifter 500 may not precisely control each of the cords 511, 512, 521, 522.

Since the respective cords 511, 512, 521, and 522 of the present embodiment always support the load of the suction grill 320, the entire length of the cord unwound to the outside of the lifter 500 is always kept in a tight state.

The first thread fixing part 329-1, the second thread fixing part 329-2, the third thread fixing part 329-3 and the fourth thread fixing part 329-4 are positioned at each corner side of the suction panel 320.

Since the four cord fixing parts are pulled upward by the cords to be closely attached to the front body 310, the edge of the suction grill 320 can be closely attached to the front body 310, and the drooping of the suction grill 320 can be minimized.

Since the cord guides 701, 702, 703, and 704 are disposed for the four cords 511, 512, 521, and 522, the cords 511, 512, 521, and 522 can be prevented from sagging.

The load applied to the respective wire 511, 512, 521, 522 may be partially dispersed to the respective wire guides 701, 702, 703, 704. Further, since the respective cords 511, 512, 521, and 522 move only along the cord grooves 754 disposed in the vertical direction, horizontal movement of the respective cords 511, 512, 521, and 522 can be suppressed, thereby minimizing the wobbling of the suction grill 320.

Next, a descending process of the suction grill 320 will be described.

When a user inputs an operation signal through a wireless remote controller or a wired remote controller in a state where the suction grill 320 is mounted on the cover panel 300, the controller determines the input operation signal and lowers the suction grill 320.

When the suction grill 320 is lowered, the user can adjust the lowered length of the suction grill 320. In this embodiment, the suction grill 320 may be lowered in stages of 1m, 2m, 3m, 4.5 m.

The control unit determines the input operation signal, simultaneously operates the first unit 510 and the second unit 520, and determines the rotation amount of the roller motor 540 disposed on the first unit 510 and the second unit 520.

When the roller motors 540 of the first unit 510 and the second unit 520 are operated simultaneously, the suction grill 320 must be prevented from being tilted by matching the rotation number and the rotation speed of the roller motors 540. For this purpose, it is preferable to synchronize the drum motors 540 of the first unit 510 and the second unit 520.

In this embodiment, when the roller motors 540 rotate the rollers 530 in a first direction (e.g., counterclockwise), the suction grill 320 is lowered. Conversely, when the roller motors 540 rotate the rollers 530 in a second direction (e.g., clockwise) opposite the first direction, the suction grill 320 will rise.

In addition, when each roll motor 540 rotates each roll 530, the rotation amount sensing device 600 disposed on the first unit 510 and the second unit 520 senses the rotation sensing factor 601, thereby sensing at least one of the rotation amount or the rotation speed of the roll 530.

The control part monitors the data sensed in the rotation amount sensing device 600 and judges whether each of the rollers 530 rotates at the same speed.

In the case where the steps on both sides of the first unit 510 and the second unit 520 are shifted, the count correction of the rotation sensing factor 601 may be performed in a stopped state for the step correction. In this embodiment, the number of counts of the rotation sensing factor 601 is corrected up to three times, and the lifter 500 is driven.

In addition, the control part monitors the descending or ascending process of the suction grill 320 based on the lifter 500 through the rotation amount sensing means 600.

In case that the rotation of one of the rollers 530 is stopped during the ascent or descent, each roller motor 540 is immediately stopped to cut off the inclination or falling possibility of the suction grill 320.

The four cords 511, 512, 521, 522 are unwound from each roll 530 simultaneously by operation of each roll motor 540. Each of the cords 511, 512, 521, 522 passes over a fourth roller 554, a third roller 553, a second roller 552, and a first roller 551. The respective cords 511, 512, 521, and 522 extending in the horizontal direction from the respective unit housings 590 are converted toward the ground by the guide 750 located in the horizontal direction of the respective unit housings 590.

The strings 511, 512, 521, and 522 are supported on the upper surfaces of the guides 750, and are movable downward in the vertical direction of the guides 750. Through the above-described process, the other ends of the cords 511, 512, 521, and 522 fixed to the cord fixing portion 329 of the suction grill 320 are simultaneously lowered downward.

The cord fixing portions 329 are located below the guides 750, and the cords 511, 512, 521, and 522 extend in the vertical direction.

That is, since the string fixing part 329 is disposed under the guide 750 supporting the string, it is possible to minimize the shaking in the process of moving the respective strings 511, 512, 521, 522 in the up-down direction. Further, since the wires 511, 512, 521, and 522 are supported by the four guides 750, the load can be uniformly distributed, and the load applied to the rollers of the roller boxes can be minimized.

Further, since the guide 750 and the roller box 550 are fixed structures, the string does not shake while being supported by the guide 750 and the first roller 551.

In the ascending or descending of the suction grill 320, only the cord fixing portion 329 is a structure that may be shaken, and the cord fixing portion 329 is disposed under the guide 750, and thus, the length of the cord between the guide 750 and the cord fixing portion 329 is minimized.

That is, since the guide 750 and the cord fixing portion 329 are disposed in the vertical direction, the length of the cord unwound during the lowering of the suction grill 320 is minimized. When the suction grill is lowered, the cord needs to be unwound in a greater length than in the vertical direction when the cord is arranged diagonally.

Next, the ascending process of the lifter 500 will be described in more detail.

The control part may raise the suction grill 320 to a home position by receiving an operation signal input by a user in a state where the suction grill 320 is lowered.

The controller rotates the rollers 530 of the first unit 510 and the second unit 520 in a clockwise direction in order to return the suction grill 320 to the initial position.

The control unit raises the suction grill 320 in a horizontal state by maintaining the same rotation amount and rotation speed of the rollers 530.

When the suction grill 320 is raised, the string fixing portion 329 is moved upward in the vertical direction, and the ends of the respective strings are also moved upward from the lower side.

With the rotation of drum 530, 1-1 cord 511 and 1-2 cord 512 of first unit 510 and 2-1 cord 521 and 2-2 cord 522 of second unit 520 are simultaneously wound onto respective drums 530.

As drum 530 of first unit 510 rotates, the 1-1 st and 1-2 st cords 511, 512 are aligned and wound in a horizontal direction in first and second areas 531, 532 of drum 530.

The 1 st to 1 st string 511 passes through the guide 750 in the vertical direction, is converted 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 wound around the outer circumferential surface of the drum body 535 of the first region 531. After the 1 st-1 st cord 511 is wound in a row on the outer circumferential surface of the drum body 535, a layer is formed again on the 1 st-1 st cord 511 wound in a row and wound.

The 1 st to 2 nd cords 512 pass through the guide 750 in the vertical direction, are horizontally changed, pass through the first roller 561, the second roller 562, the third roller 563, and the fourth roller 564, and are wound around the outer circumferential surface of the drum body 535 of the second region 532.

In second unit 520, which rotates simultaneously with first unit 510, 2-1 wire 521 and 2-2 wire 522 are wound at the same speed as first unit 510.

As with first unit 510, as drum 530 of second unit 520 rotates, one end of 2-1 cord 521 and one end of 2-2 cord 522 are aligned and wound in first and second areas 531 and 532 of drum 530.

As described in the present embodiment, the suction grill 320 is supported at four points by the 1 st-1 st wire 511, the 1 st-2 st wire 512, the 2 nd-1 st wire 521, and the 2 nd-2 nd wire 522.

In a state where the suction grill 320 is supported at four points, both sides of the suction grill 320 can be simultaneously raised or lowered by synchronizing the rotation amount and the rotation speed of the rollers 530 disposed in the first unit 510 and the second unit 520.

In the indoor unit of the present embodiment, each of the drum motors 540 is disposed in the first unit 510 and the second unit 520, but the control unit may uniformly control the four cords by the rotation amount sensing device 600.

In addition, in the indoor unit of this embodiment, the 1 st-1 st cord 511 and the 1 st-2 st cord 512 can be simultaneously wound or unwound by driving one drum 530, and thus, the inclination of the suction grill 320 can be prevented.

While the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to the embodiments, but may be manufactured in various forms different from each other, and it will be understood by those skilled in the art to which the present invention pertains that the present invention may be implemented in other specific forms without changing the technical idea or essential features of the present invention. The embodiments described above are therefore illustrative in all respects, rather than restrictive.

Description of reference numerals

100: the casing 101: suction inlet

102: the discharge port 103: suction flow path

104: discharge flow path 110: shell casing

120: front panel 130: indoor heat exchanger

140: indoor air supply fan 200: blade module

300: the front panel 310: front body

320: the suction grill 321: grid hole

322: the grill main body 323: grid

324: grid main body portion 329: cord fixing part

330: pre-filter 500: lifting device

600: rotation amount sensing device 700: cord guide

701: first cord guide 702: second cord guide

703: third wire rope guide 704: fourth line rope guide

710: a fixed block 720: assembling block

730: fixed block main body 740: assembling block main body

750: guide piece

Claims (20)

1. A ceiling type indoor unit of an air conditioner is characterized in that,

the method comprises the following steps:

a housing having a suction port and a discharge port;

a suction grill detachable from the housing and configured to be movable up and down with respect to the housing;

a first unit disposed in the casing, for winding or unwinding a cord connected to the suction grill; and

a cord guide disposed at the housing, supporting the cord extending from the first unit;

the cord guide comprising:

a block disposed at the housing and having a guide mounting wall facing the cord passing through the cord guide; and

a guide body rotatably assembled to the block, a cord groove in which the cord is wound being formed along an outer periphery of the guide body; and

a guide shaft that penetrates a rotation center of the guide body and is rotatably assembled to the block;

the cord passing through the cord guide is positioned in the cord groove and passes between the guide body and the guide mounting wall,

a space between the guide body and the guide mounting wall is smaller than a diameter of the cord, and a separation preventing protrusion protruding toward the guide body is formed on the guide mounting wall.

2. The ceiling type indoor unit of an air conditioner according to claim 1,

the block includes:

a fixing block protruding toward the first unit; and

an assembling block assembled on the fixing block,

the guide shaft is rotatably assembled to the assembly block.

3. The ceiling type indoor unit of an air conditioner according to claim 1,

the guide shaft is separable from the guide body.

4. The ceiling type indoor unit of an air conditioner according to claim 2,

the assembly block includes:

the assembling block main body is assembled with the fixing block and fixed on the fixing block; and

a guide mounting space disposed outside the assembly block body, the guide body being rotatably inserted into the guide mounting space,

the guide shaft traverses the guide mounting space.

5. The ceiling type indoor unit of an air conditioner according to claim 4, wherein,

the guide shaft is located inside the guide mounting space.

6. The ceiling type indoor unit of an air conditioner according to claim 4, wherein,

the guide mounting space includes:

a first guide mounting wall formed at the assembly block body and opposite to one side surface of the guide body;

a third guide mounting wall formed at the assembly block main body and opposite to the other side surface of the guide main body; and

a second guide mounting wall formed at the assembly block body and connecting the first guide mounting wall and the third guide mounting wall,

the second guide mounting wall is spaced from the guide body by a distance less than the diameter of the cord.

7. The ceiling indoor unit of an air conditioner according to claim 6,

the separation preventing protrusion is located at an upper side than the guide shaft and protrudes from the second guide mounting wall toward the guide body, and an interval between the separation preventing protrusion and the guide body is smaller than a diameter of the cord.

8. The ceiling type indoor unit of an air conditioner according to claim 7,

the separation prevention protrusion is engaged with an outer side surface of the guide body when the guide body moves in the vertical direction.

9. The ceiling type indoor unit of an air conditioner according to claim 7,

the separation prevention protrusion is formed in an arc shape and is formed to surround an outer side surface of the guide body.

10. The ceiling type indoor unit of an air conditioner according to claim 4, wherein,

further comprising:

a guide shaft groove formed outside the assembly block body, the guide shaft being rotatably inserted into the guide shaft groove,

the guide shaft groove is formed to be recessed in a lower direction from an upper side surface of the assembly block main body.

11. The ceiling indoor unit of an air conditioner according to claim 10,

the guide shaft groove includes:

a first shaft wall formed at the assembly block body and extending along a length direction of the guide shaft;

a third shaft wall formed on the assembly block body, extending along the longitudinal direction of the guide shaft, and facing the first shaft wall;

a second shaft wall formed at the assembly block main body and connecting the first shaft wall and the third shaft wall; and

and a second separation prevention protrusion disposed on at least one of the first shaft wall and the third shaft wall and engaged with an upper portion of the guide shaft.

12. The ceiling type indoor unit of an air conditioner according to claim 1,

the cord guide comprises:

a first cord guide through which a 1 st-1 st cord extending from the first unit passes; and

a second cord guide through which 1 st-2 nd cords extending from the first unit pass;

the guide shafts of the first cord guide and the second cord guide are arranged in a line.

13. The ceiling type indoor unit of an air conditioner according to claim 1,

the cord guide comprising:

a first cord guide through which a 1 st-1 st cord extending from the first unit passes; and

a second cord guide through which 1 st-2 nd cords extending from the first unit pass;

the ceiling type indoor unit of the air conditioner includes:

a second unit disposed at the casing, combined with the suction grill by a 2-1 st wire and a 2-2 nd wire, and ascending or descending the other side of the suction grill by simultaneously winding or unwinding the 2-1 st wire and the 2-2 nd wire;

a third cord guide disposed on the casing, supporting the 2 nd-1 st cord, and positioned above the suction grill; and

and a fourth cord guide disposed at the casing, supporting the 2 nd to 2 nd cords, and positioned at an upper side of the suction grill.

14. The ceiling indoor unit of an air conditioner according to claim 13, wherein,

the 1 st-1 st wire and the 1 st-2 nd wire extending from the first unit are arranged in a row, the 2 nd-1 st wire and the 2 nd-2 nd wire are arranged in a row,

the 1 st-1 st, 1 st-2 nd, 2 nd-1 st and 2 nd-2 nd cords extend parallel to each other.

15. The ceiling indoor unit of an air conditioner according to claim 13, wherein,

the first and second cord guides are located at the same height as the first unit, and the third and fourth cord guides are located at the same height as the second unit.

16. The ceiling indoor unit of an air conditioner according to claim 13, wherein,

the suction grill further includes:

a first cord fixing part to which the 1 st-1 st cord is fixed;

a second cord fixing part to which the 1 st-2 nd cords are fixed;

a third wire fixing part to which the 2 nd-1 th wire is fixed; and

a fourth cord fixing part to which the 2 nd to 2 nd cords are fixed,

the first cord fixing part is located at a lower side of the first cord guide,

the second cord fixing part is located at a lower side of the second cord guide,

the third thread fixing part is positioned at a lower side of the third thread guide,

the fourth cord fixing part is located at a lower side of the fourth cord guide.

17. The ceiling indoor unit of an air conditioner according to claim 13, wherein,

the first cord guide, the second cord guide, and the first unit are arranged in a row, and the third cord guide, the fourth cord guide, and the second unit are arranged in a row.

18. The ceiling indoor unit of an air conditioner according to claim 13, wherein,

the first, second, third, and fourth cord guides are disposed at the same height.

19. The ceiling indoor unit of an air conditioner according to claim 13, wherein,

the bottom surface of the case is formed in a quadrangular shape, the bottom surface forms four corners,

the first cord guide is disposed at one of two corners disposed at one side of the outer case, the second cord guide is disposed at the other of the two corners disposed at one side of the outer case,

the third wire rope guide is disposed at one of two corners disposed at the other side of the case, and the fourth wire rope guide is disposed at the other of the two corners disposed at the other side of the case.

20. The ceiling indoor unit of an air conditioner according to claim 13, wherein,

the housing further includes:

a housing case suspended from an indoor ceiling and having an open bottom; and

a front body covering a bottom surface of the housing case and having the suction port and the discharge port formed therein,

the first unit and the second unit are disposed inside the outer shell case,

the first, second, third and fourth cord guides are disposed at the front body,

the suction grill is disposed at a lower side than the front body.

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