KR20200102922A - Indoor unit for air conditioner and a method controlling the same - Google Patents

Abstract

The present invention relates to an indoor unit of an air conditioner. The indoor unit of the air conditioner according to an embodiment of the present invention includes a stabilizer disposed to be spaced apart from the outer periphery of a blowing fan, wherein the stabilizer is provided with a plurality of guide portions protruding at different heights in an axial direction of the blowing fan, so that air flow in the axial direction can be reduced.

Description

Indoor unit for air conditioner and a method controlling the same}

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

The indoor unit of the air conditioner may be classified into an upright type, a wall-mounted type, or a ceiling type according to the installation location. Among them, the wall-mounted indoor unit is understood as an air conditioner of a type installed so as to be attached to a vertical wall surface.

In general, the wall-mounted indoor unit includes an air intake unit and a discharge unit. The air sucked from the air intake part may pass through a heat exchanger and a blower fan and then discharged into the room through the discharge part.

A cross-flow fan may be included in the blowing fan, and a guide structure for guiding the air flow from the air intake unit to the discharge unit may be disposed outside the cross-flow fan.

The prior literature below discloses an air conditioner for wall mounting including the guide structure. Information in prior literature is as follows.

1. Registration No. (Registration Date): Korean Patent No. 10-0564971 (March 21, 2006)

2. Title of invention: wall-mounted air conditioner

In the preceding literature, a discharge grill is installed at the lower end of the indoor heat exchanger, and the discharge grill is configured to guide the discharge of air from the outside of the indoor fan. According to the preceding literature, unstable discharge flow is formed in the space between the outer circumferential surface of the indoor fan and the discharge grill, and there is a problem that the flow rate decreases and noise is generated.

In particular, when the indoor fan is configured as a cross-flow fan, there is a problem in that flow performance decreases due to an increase in the flow component of the cross-flow fan in the axial direction. Further, the flow component in the axial direction increases when dust accumulates in the filter or a high-performance filter is provided, and the filter resistance increases.

An object of the present invention is to propose an indoor unit of an air conditioner for improving flow performance by improving a shape of a stabilizer provided outside a blowing fan in order to solve the above problems.

In particular, an object of the present invention is to propose an indoor unit of an air conditioner capable of reducing a flow component in the axial direction of the blowing fan by providing a plurality of guides protruding from the outer surface of the stabilizer in the direction of the outer peripheral surface of the blowing fan. .

Another object of the present invention is to propose an indoor unit of an air conditioner capable of reducing a flow component in the axial direction by forming different protruding heights of the plurality of guide portions with respect to the axial direction of the blower fan.

In addition, by arranging the portions extending in the axial direction of the plurality of guides so as to alternate with the fan block of the cross-flow fan, the indoor unit of the air conditioner is proposed to prevent uneven formation of the discharged flow rate in the axial direction of the cross-flow fan. It aims to do.

In addition, the indoor unit of the air conditioner prevents uneven eddy currents from occurring around the plurality of guides by ensuring that the connecting lines between the upper ends of the plurality of guides and the center of the blowing fan are located on the same plane with respect to the axial direction. It aims to propose.

The indoor unit of the air conditioner according to an embodiment of the present invention includes a stabilizer disposed to be spaced apart from the outer periphery of the blowing fan, and the stabilizer includes a plurality of guide portions protruding at different heights in the axial direction of the blowing fan. Thus, it is possible to reduce the air flow in the axial direction.

The plurality of guide portions are configured to protrude from one surface of the stabilizer facing the outer periphery of the blower fan, so as to block air flow in the axial direction.

In addition, the plurality of guide portions include a first guide portion protruding to a first height from one surface of the stabilizer and a second guide portion protruding to a second height, and the first and second guide portions are alternately arranged. , It is possible to easily block air flow in the axial direction.

In addition, by arranging the portions extending in the axial direction of the plurality of guide portions so as to alternate with the fan block of the cross flow fan, it is possible to prevent the flow rate discharged from the axial direction of the cross flow fan from being unevenly formed.

In addition, since the connecting lines between the upper ends of the plurality of guides and the center of the blowing fan are positioned on the same plane with respect to the axial direction, it is possible to prevent uneven eddy currents from occurring around the plurality of guides.

An indoor unit of an air conditioner according to an embodiment of the present invention includes a stabilizer disposed on a discharge side of a cross-flow fan, and the stabilizer includes: a stabilizer body having an opposite surface facing the cross-flow fan; And a guide protrusion protruding from the stabilizer body toward the cross-flow fan.

The distance between the guide protrusion and the cross flow fan may be variable with respect to the axial direction.

The guide protruding portion includes a plurality of guide portions protruding from the stabilizer body toward the cross-flow fan with different widths.

The plurality of guide portions may be aligned in the axial direction.

A first guide portion protruding from the stabilizer body by a maximum first width W1 toward the cross-flow fan from the guide protrusion portion; And a second guide part connected to the axial side of the first guide part and protruding from the stabilizer body toward the cross-flow fan by a maximum second width W2.

A guide connection part provided between the first guide part and the second guide part is further included, and the guide connection part extends from the stabilizer body toward the cross-flow fan.

A heat exchanger disposed on the suction side of the cross flow fan; And a drain pan disposed under the heat exchanger.

The stabilizer body may be configured to extend upward from a bottom surface of the drain pan.

The first guide portion may be configured to have a larger protruding width as it goes upward from the bottom of the stabilizer body.

The second guide part may be configured to have a smaller protruding width as it goes upward from the bottom of the stabilizer body.

The cross-flow fan includes a plurality of fan blocks arranged in the axial direction and provided with two support plates and blades.

Surfaces of the first guide portion and the second guide portion facing the cross-flow fan may be aligned with the fan block Bf.

When defining two extension lines (ℓ1, ℓ2) extending radially toward the stabilizer after passing through the two support plates, the first extension line (ℓ1) of the two extension lines (ℓ1, ℓ2) is the first guide Passing through the part, the second extension line ℓ2 may pass through the second guide part.

When defining a third extension line (ℓ3) extending in a radial direction toward the cross-flow fan after passing through the guide connection portion, the third extension line (ℓ3) may pass through the blade.

A first height H1 protruding from the bottom of the drain pan may be greater than a second height H2 protruding from the second guide part.

When the extension line Lo extending from the center Cf of the crossflow fan to the upper end of the first guide part is horizontally moved in the axial direction, the extension line Lo may pass through the upper end of the second guide part.

A plurality of left and right vanes provided in the axial direction on the bottom of the drain pan and controlling the direction of the discharge air flow in the left and right directions; And a link bar connecting the plurality of left and right vanes.

According to an embodiment of the present invention, it is possible to improve the flow performance by improving the shape of the stabilizer provided outside the cross-flow fan.

In particular, by providing a plurality of guide portions protruding from the outer surface of the stabilizer in the direction of the outer circumferential surface of the blowing fan, it is possible to reduce the flow component in the axial direction of the blowing fan.

In addition, it is possible to reduce the flow component in the axial direction by forming different protruding heights of the plurality of guide portions with respect to the axial direction of the blowing fan.

In addition, by arranging the portions extending in the axial direction of the plurality of guide portions so as to alternate with the fan block of the cross flow fan, it is possible to prevent the flow rate discharged from the axial direction of the cross flow fan from being unevenly formed.

In addition, by making the connection line between the upper end of the plurality of guides and the center of the blowing fan are positioned on the same plane with respect to the axial direction, it is possible to prevent uneven eddy currents from occurring around the plurality of guides.

1 is a view showing an indoor unit of an air conditioner according to an embodiment of the present invention installed on a wall.
2 is a perspective view showing the configuration of the indoor unit.
3 is an exploded perspective view showing the configuration of the indoor unit.
4 is a perspective view showing a state in which parts of an indoor unit are installed in the case.
5 is a cross-sectional view taken along line VII-VII' of FIG. 2.
6 is a perspective view showing the configuration of a blowing fan according to an embodiment of the present invention.
7 is a front perspective view showing the configuration of a drain pan according to an embodiment of the present invention.
8 is a rear perspective view showing the configuration of the drain pan.
9 is an enlarged view of portion "A" of FIG. 8.
10 is a top view showing the configuration of the drain pan.
11 is an enlarged view of portion "B" of FIG. 10.
12 is a schematic diagram showing an arrangement of a blower fan and a drain pan according to an embodiment of the present invention.
13 is a diagram illustrating a drain pan installed in an indoor unit according to an exemplary embodiment of the present invention.
14 is a view showing a combination of left and right vane motors and left and right vanes according to an embodiment of the present invention.
15 is a cross-sectional view showing the configuration and air flow of an indoor unit according to an embodiment of the present invention.
16 is an experimental graph showing a change in noise according to the amount of air for the conventional stabilizer structure and the stabilizer structure according to the present embodiment.
17 is an experimental graph showing a change in power consumption according to an air volume for a conventional stabilizer structure and a stabilizer structure according to the present embodiment.
18 is an experimental graph showing a change in static pressure of a blowing fan according to the amount of air in the conventional stabilizer structure and the stabilizer structure according to the present embodiment.
19A and 19B are experimental graphs showing changes in noise according to the frequency of a blowing fan for the conventional stabilizer structure and the stabilizer structure according to the present embodiment.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. However, the spirit of the present invention is not limited to the presented embodiments, and those skilled in the art who understand the spirit of the present invention will be able to easily propose other embodiments within the scope of the same idea.

1 is a view showing an indoor unit of an air conditioner according to an embodiment of the present invention installed on a wall, FIG. 2 is a perspective view showing the configuration of the indoor unit, and FIG. 3 is an exploded perspective view showing the configuration of the indoor unit, 4 is a perspective view showing a state in which components of the indoor unit are installed inside the case, FIG. 5 is a cross-sectional view taken along VII-VII' of FIG. 2, and FIG. 6 is a configuration of a blowing fan according to an embodiment of the present invention. Is a perspective view showing.

1 to 6, an indoor unit 10 of an air conditioner according to an exemplary embodiment of the present invention may be installed on a wall W.

The indoor unit 10 includes an installation plate 20 fixed to the wall W, a chassis 30 coupled to the front of the installation plate 20, and a case 100 coupled to the front of the chassis 30. ) Is included.

The installation plate 20 is a component for fixing the indoor unit 10 to the wall W, and allows the chassis 30 to be mounted after being coupled to the wall W. The installation plate 20 has a thin plate shape and includes a central portion coupled to the rear surface of the chassis 30 and both side portions extending downward from both sides of the central portion to support the lower portion of the chassis 30.

A plurality of components may be installed inside the chassis 30 and the case 100. The plurality of components may include a blower fan 40 and a heat exchanger 60.

The chassis 30 includes a plate coupling portion 31 coupled to the installation plate 20 and a rear guide extending downwardly from the plate coupling portion 31 to surround a part of the outer peripheral surface of the blowing fan 40 ( 33) are included.

The plate coupling portion 31 has a thin plate shape. The rear guide 33 functions as a flow guide for guiding the airflow sucked by the blowing fan 40 to the front side of the blowing fan 40, that is, toward the discharge portions 126 and 129.

The blowing fan 40 includes a cross-flow fan. The cross-flow fan may suck air sucked from the upper portion of the indoor unit 10 in a circumferential direction and discharge it in the circumferential direction. The axial direction of the blowing fan 40 may be a horizontal direction of the indoor unit 10.

The blowing fan 40 may be rotatably supported on both sides of the chassis 30. In detail, the chassis 30 further includes two fan support portions 35 protruding forward from both sides of the rear guide 33 and supporting both side ends of the blowing fan 40. A fan motor 45 driving the blower fan 40 may be installed outside any one of the two fan support parts 35. The shaft of the fan motor 45 may pass through the fan support 35 and be coupled to the blowing fan 40.

The blower fan 40 includes two side plates 41 and 42 spaced apart from each other, and a plurality of support plates 43 and the plurality of side plates 41 and 42 arranged between the two side plates 41 and 42 and spaced apart from each other. It includes a blade 44 disposed between the support plate 43 of.

The two side plates 41 and 42 include a first side plate 41 and a second side plate 42 disposed on both sides of the blowing fan 40. Each of the first and second side plates 42 and 42 may have a ring shape. In this case, a direction from the first side plate 41 toward the second side plate 42 may be defined as an “axial direction”.

The blade 44 may be disposed between the first side plate 41 and the adjacent support plate 43. In addition, a blade 44 may be disposed between the support plate 43 and the second side plate 42. A plurality of blades 44 are provided and are arranged in the circumferential direction.

The assembly of the first side plate 41, the support plate 43 closest to the first side plate 41, and a plurality of blades 44 in the circumferential direction disposed therebetween may be referred to as a “fan block”. have. In addition, an assembly of two adjacent support plates 43 and a plurality of blades 44 in a circumferential direction disposed between the two support plates 43 may also be referred to as “fan blocks”.

Accordingly, it may be understood that a plurality of fan blocks are combined in the axial direction to constitute the blowing fan 40. The inside of the blowing fan 40 forms a hollow. That is, the inside of the plurality of blades 44 may form a hollow, and a hollow may be formed from the center of the first side plate 41 to the center of the second side plate 42.

A motor cover 47 may be coupled to the fan motor 45. The fan motor 45 may be disposed in an inner space formed by the fan support part 35 and the motor cover 47.

A control box 50 provided with a control part for operating the indoor unit 10 may be installed at a side portion of the chassis 30. The control box 50 is located at the side of the fan motor 45 and may be supported by a case body 110 to be described later.

A heat exchanger 60 may be installed in an inner space formed between the chassis 30 and the case 100. Based on the air flow, the heat exchanger 60 is disposed on the suction side of the blowing fan 40 and may be supported by the chassis 30.

The heat exchanger 60 may have a bent shape. In detail, the heat exchanger 60 includes a first heat exchange part 61 extending vertically in a direction corresponding to the front part of the indoor unit 10, and a first heat exchange part 61 extending obliquely upward from the first heat exchange part 61. A second heat exchange part 63 and a third heat exchange part 65 extending obliquely downward from the second heat exchange part 63 are included. It can be understood that the first to third heat exchange units 61, 63 and 65 are disposed outside the blowing fan 40 and disposed in a suction area of the air sucked by the blowing fan 40.

A heat exchanger holder 67 is coupled to the heat exchanger 60. The heat exchanger holder 67 is coupled to the side of the heat exchanger 60 and may be supported on the inner side of the case 100.

A refrigerant tube 70 is coupled to the heat exchanger 60. The refrigerant tube 70 may introduce a refrigerant into the heat exchanger 60 or guide a flow of the refrigerant discharged from the heat exchanger 60. The refrigerant tube 70 is coupled to a side of the heat exchanger 60, and a tube cover 75 is wrapped outside the refrigerant tube 70.

A lower plate 55 forming a lower exterior of the indoor unit 10 is disposed under the chassis 30.

A case 100 is provided in front of the chassis 30. The assembly of the chassis 30 and the case 100 is understood to constitute a "indoor body". The main body of the indoor unit may be configured to have a substantially hexahedral shape.

An air flow path is formed inside the case 100. In detail, an air intake part 115a is formed on the upper part of the case 100, and a filter assembly 80 is installed in the air intake part 115a. The air intake part 115a may be formed by opening in the upper surface part 115 of the case body 110.

The filter assembly 80 may be configured as a high-performance filter in order to improve the filtering effect, and thus, the flow resistance in the filter may be formed somewhat large. For example, the filter assembly 80 may include a pre-filter and a dielectric filter. The dielectric filter may be configured to form an electric field that collects dust by applying a high voltage.

A discharge part is formed under the case 100. A lower discharge part 126 and a front discharge part 129 are formed in the discharge part. The lower discharge part 126 may be formed at an opened lower end of the grill frame 120, and the front discharge part 129 may be formed by opening at least a portion of the front surface of the grill frame 120. Accordingly, the opening directions of the lower discharge part 126 and the front discharge part 129 may be formed perpendicular to each other (see FIG. 15 ).

A drain pan 200 disposed under the heat exchanger 60 may be provided at the discharge portion. The drain pan 200 may include left and right vanes 230 for controlling the direction of the discharge air flow in the left and right directions. The left and right vanes 230 may be rotated in a horizontal direction based on a vertical line to control the horizontal direction of the discharge air flow. A plurality of the left and right vanes 230 may be provided to be connected to one link bar, and the plurality of left and right vanes 230 may rotate together according to the movement of the link bar.

The front part of the case 100 includes a front panel 150 forming the front exterior of the indoor unit 10. A display unit 156 capable of checking operation information of the indoor unit 10 may be provided on the front panel 150. The front panel 150 may be disposed in front of the grill frame 120.

The front panel 150 may be provided to be movable upward or downward. For example, when the indoor unit 10 is powered on, the front panel 150 may move upward as an initial operation.

When the front panel 150 moves upward, a human body detection sensor 165 for detecting a human body of a guest may be exposed on the lower right side of the indoor unit 10. As an example, the human body detection sensor 165 may include a camera module equipped with a lens 166. The lens 166 may form an angle of view toward the front. In addition, the human body detection sensor 165 is supported by the lower grille 125a of the grill frame 120 and may be positioned at a side of the lower discharge portion 126.

The case 100 includes a grill frame 120 forming the exterior of the front edge of the indoor unit 10. The grill frame 120 may include a grill portion having a lower grill 125a and a side grill 125b. A lower discharge part 126 is formed at an approximately central part of the lower grill 125a.

A left and right vane motor 300 for driving the left and right vanes 230 is provided on the side of the front discharge part 129.

An upper and lower vane 160 for controlling the vertical direction of the discharge air flow is provided under the case 100. The upper and lower vanes 160 may be configured to open and close the lower discharge part 126. The upper and lower vanes 160 are rotatably or slidably provided to control the vertical direction of the discharge air flow.

A vane motor 162 for driving the upper and lower vanes 160 is provided at the side of the upper and lower vanes 160. The vane motor 162 may be provided on both sides of the upper and lower vanes 160, respectively.

The case 100 further includes a temperature/humidity sensor 194 for sensing the temperature and humidity of an indoor space in which the indoor unit 10 is installed. The temperature and humidity sensor 194 includes a temperature sensor and a humidity sensor, and may be installed on a side surface of the case body 110.

The case 100 further includes a dust sensor 192 for sensing air quality information around the indoor unit 10. The dust sensor 192 may be installed on the side surface 112 of the case body 110.

A filter cleaning device 90 for separating dust accumulated in the filter assembly 80 and a dust bin 93 for storing the separated dust may be provided on the upper part of the case 100. The dust bin 93 may be disposed on the side of the filter assembly 300.

A brush 95 may be provided between the filter assembly 80 and the dust bin 93. The brush 420 may contact the pre-filter provided in the filter assembly 300 to remove foreign matter accumulated in the pre-filter.

The filter cleaning device 90 may be disposed below the dust container 93 and may be positioned above the control box 50. When the filter cleaning device 90 is driven, the suction force of the filter cleaning device 90 acts on the filter assembly 80 via the dust bin 93, and foreign matter separated from the filter assembly 80 is It may be stored in the dust bin 93.

7 is a front perspective view showing the configuration of a drain pan according to an embodiment of the present invention, FIG. 8 is a rear perspective view showing the configuration of the drain pan, and FIG. 9 is an enlarged view of a portion "A" of FIG. 8; 10 is a top view showing the configuration of the drain pan, FIG. 11 is an enlarged view of a portion "B" of FIG. 10, and FIG. 12 is a view showing an arrangement of a blower fan and a drain pan according to an embodiment of the present invention. It is a schematic diagram.

7 to 10, the indoor unit 10 according to an embodiment of the present invention includes a drain pan 200 that supports a heat exchanger 40 and stores condensed water generated from the heat exchanger 60. More included. The drain pan 200 may be disposed under the heat exchanger 60, for example, under the first heat exchange part 61. In addition, the drain pan 200 may be disposed behind the front discharge portion 129 of the grill frame 120.

In detail, the drain pan 200 includes a pan body 210 having a heat exchanger support rib 220. The fan body 210 constitutes a bottom surface of the drain pan 200, and the heat exchanger support rib 220 protrudes upward from the fan body 210 to support the lower portion of the heat exchanger 60. have.

The fan body 210 includes a body bottom portion 211, a body side portion 213 extending upward from both sides of the body bottom portion 211, and a body bottom portion 211 extending upwardly from the front of the body bottom portion 211. The body front portion 215 is included.

Condensed water storage space for storing condensed water generated from the heat exchanger 60 in the fan body 210 by the configuration of the body bottom 211, the body side 213 and the body front 215 225 can be defined.

The drain pan 200 further includes a stabilizer 250 protruding upward from the rear portion of the fan body 210 and disposed so as to face the outer circumferential surface of the blowing fan 40. The rear surface of the stabilizer 250 faces the blowing fan 40.

The stabilizer 250 is disposed on the discharge side of the blowing fan 40, and it can be understood as a component for improving the discharge flow performance by generating a stable eccentric vortex within the blowing fan 40.

The stabilizer 250 may be disposed adjacent to the lower front side of the blowing fan 40. In detail, the stabilizer 250 is installed to be spaced apart from the outer circumferential surface of the blowing fan 40 on the discharge side of the blowing fan 40, so that the air discharged from the blowing fan 40 is directed toward the heat exchanger 60. Prevent backflow. A relatively small space may be formed between the stabilizer 250 and the outer peripheral surface of the blowing fan 40. In addition, the stabilizer 250 may be elongated along the axial direction of the blowing fan 40.

The drain pan 200 is provided with left and right vanes 230 for controlling the horizontal direction of the discharge air flow. The left and right vanes 230 are provided on the body bottom portion 211. In addition, a plurality of the left and right vanes 230 may be provided, and may be spaced apart from each other in the left and right directions. In addition, the plurality of left and right vanes 230 may be disposed above the upper and lower vanes 160.

At the sides of the left and right vanes 230, a left and right vane motor 300 for providing driving force to the left and right vanes 83 is provided.

The stabilizer 250 is positioned at the side of the blowing fan 40 and may be configured to extend in a vertical direction. In addition, the lower end 251a of the stabilizer 250 may be connected to the fan body 210 by a body connection part 270. The body connection part 270 may be configured to have a set curvature between the body bottom part 211 of the fan body 210 and the stabilizer 250.

In detail, the stabilizer 250 is provided on a stabilizer body 251 having a rear surface facing the blowing fan 40 and the stabilizer body 251, and the stabilizer 250 and the blowing fan 40 Guide protrusions 252, 253, and 255 are provided for reducing air flow components in the axial direction in the interspace between ). The guide protrusions 252, 253, and 255 may be provided to protrude from the rear surface of the stabilizer body 251. The rear surface of the stabilizer body 251 may be referred to as a "guide surface".

In the guide protrusions 252, 253, 255, a first guide part 252 protruding from the rear side of the stabilizer body 251 toward the outer circumference of the blowing fan 40 by a maximum first width W1 and the first guide Includes a second guide part 253 connected to the axial side of the part 252 and protruding from the rear side of the stabilizer body 251 toward the outer circumference of the blowing fan 40 by a maximum second width W2 do.

The first guide part 252 may be configured to have a larger protruding width as it goes upward from the lower end 251a of the stabilizer body 251. Here, the lower end 251a may constitute a lower end of the first guide part 252.

Accordingly, the first width W1 constitutes a width protruding from the upper end of the first guide part 252, and the distance to the blowing fan 40 is closer as it goes to the top of the first guide part 252. I can lose. In addition, the first guide portion 252 may extend gently inclined or rounded in the vertical direction.

The second guide part 253 may be configured to have a smaller protruding width as it goes upward from the lower end 251a of the stabilizer body 251. Here, the lower end 251a may constitute a lower end of the second guide part 253.

Accordingly, the second width W2 constitutes a width protruding from the lower end of the second guide part 253, and the distance to the blowing fan 40 increases as it goes to the top of the second guide part 253 I can lose. In addition, the second guide part 253 may extend gently inclined or rounded in the vertical direction.

The maximum first width W1 may be larger than the maximum second width W2. In addition, the width of the lower end 251a of the first guide part 252 may be formed equal to the width W2 of the lower end part 251a of the second guide part 253.

The guide protrusions 252, 253, 255 are provided between the first guide part 252 and the second guide part 253, and further include a guide connection part 255 connecting the first and second guide parts 252 and 253. Included. The guide connecting portion 255 may extend from a side end portion of the first guide portion 252 toward a side end portion of the second guide portion 253.

The guide connection part 255 may be configured to protrude from the rear surface of the stabilizer body 251.

The first guide part 252, the guide connection part 255, and the second guide part 253 are each provided in plural, and may be alternately disposed in the axial direction. Therefore, when looking at the stabilizer 250 in the axial direction of the blowing fan 40, the widths of the guide protrusions 252, 253, and 255 protruding from the rear surface of the stabilizer body 251 may be configured to vary in the axial direction. . That is, the protruding widths of the guide protrusions 252, 253, and 255 may be configured to repeatedly increase and decrease in the axial direction.

According to this configuration, the distance between the blowing fan 40 and the stabilizer 250 is not uniformly formed in the axial direction, and the guide protrusions 252, 253, 255 act as resistance against the air component flowing in the axial direction. , In the space between the blowing fan 40 and the stabilizer 250, it is possible to reduce the air flow in the axial direction. The air flow component in the axial direction can be understood as a flow component that reduces the amount of air discharged through the discharge units 126 and 129, and according to the structure according to the present embodiment, such air flow component can be reduced.

Referring to FIG. 11, the guide protrusions 252, 253, and 254 are alternately disposed in the axial direction of the blowing fan 40. In addition, the first guide portion 252 and the second guide portion 253 constituting the guide protrusions 252, 253 and 255 may extend in the axial direction and have opposite surfaces facing the blowing fan 40.

The axial length of the first guide part 252 forms a first length Ls1, the axial length of the second guide part 253 forms a second length Ls2, and the guide connection part ( The axial length of 255) forms a third length Ls3. In addition, the axial length of the fan block Bf constituting the blowing fan 40 forms the block length Lf.

The first length Ls1 or the second length Ls2 may be larger than the third length Ls3.

The facing surfaces of the first guide part 252 and the second guide part 253 may be configured to be aligned with the fan block Bf constituting the blowing fan 40. The air flow is relatively weak in the support plates 43 on both sides of the fan block Bf, and the air flow may be relatively strong as the air flow is closer to the central portion of the blade 44. Accordingly, in order to prevent the flow generated in the central portion of the blade 44 from being developed in the axial direction, the radially extending line of the guide connecting portion 255 may be positioned within the fan block Bf.

In detail, when defining two extension lines (ℓ1, ℓ2) extending in the radial direction toward the stabilizer 250 after passing through the two nearest support plates 43 constituting the fan block (Bf), the two extension lines A first extension line ℓ1 of (ℓ1, ℓ2) may pass through the first guide part 252 and a second extension line ℓ2 may pass through the guide connection part 255.

In other words, the third extension line (ℓ3) extending in the radial direction toward the blowing fan 40 after passing the boundary between the first guide part 252 and the guide connection part 255 can pass through the blade 44. have. Here, the term "radial direction" can be understood as a direction perpendicular to the axial direction.

In this way, by preventing one fan block Bf and each of the guide parts 252 and 253 from being aligned side by side, the air flow component in the axial direction in the flow path between the stabilizer 250 and the fan block Bf is You can prevent them from being reinforced by overlapping.

Referring to FIG. 12, the outer periphery of the blowing fan 40 may be positioned spaced apart from the guide protrusions 252, 253, and 255 by a set interval. The spaced distance from the lower portion of the guide protrusions 252,253,255 to the outer circumference of the blowing fan 40 forms a first separation distance S1, and the outer circumference of the blowing fan 40 from the upper portion of the guide protrusions 252,253,255 The separated distance to forms a second separation distance S2. The first separation distance S1 may be formed larger than the second separation distance S2.

Since the protruding height of the first guide part 252 is the largest among the guide protrusions 252, 253, 255, the first separation distance S1 is the air blower fan 40 from the lower portion of the first guide part 252. It can be understood as the distance to the outer periphery. In addition, the second separation distance S2 may be understood as a distance from the upper portion of the first guide part 252 to the outer periphery of the blowing fan 40.

A height at which the first guide part 252 protrudes from the body bottom part 211 of the fan body 210 in the vertical direction forms a first height H1, and the second guide part 253 The protruding height forms the second height H2. That is, the first height H1 is a distance from the fan body 210 to the upper end 252a of the first guide part 252, and the second height H2 is from the fan body 210 It may be a distance to the upper end 253a of the second guide part 253.

The first height H1 may be larger than the second height H2.

And, when the extension line Lo extending from the center Cf of the blowing fan 40 to the upper end 252a of the first guide part 252 is horizontally moved in the axial direction, the extension line Lo becomes the second It may pass through the upper end 253a of the guide part 252.

According to this configuration, the air flow passing through the blowing fan 40 can generate a uniform air volume for each of the plurality of fan blocks Bf aligned in the axial direction.

FIG. 13 is a view showing a drain pan installed in the indoor unit according to an embodiment of the present invention, and FIG. 14 is a view showing a combination of left and right vane motors and left and right vanes according to an embodiment of the present invention.

13 and 14, the drain pan 200 according to an embodiment of the present invention further includes a link bar 240 connected to a plurality of left and right vanes 230. The link bar 240 extends long in the left and right direction (axial direction), and may be coupled to the rear portions of the plurality of left and right vanes 230.

A first vane pin 260 is coupled to a rear portion of the left and right vanes 230. The first vane pin 260 may pass through the link bar 240 and be coupled to the left and right vanes 230. A plurality of the first vane pins 260 may be provided, and each of the first vane pins 260 may be coupled to each of the left and right vanes 230.

A second vane pin 265 is coupled to the front portion of the left and right vanes 230. The second vane pin 265 may pass through the left and right vanes 230 and be coupled to the body bottom portion 211 of the fan body 210. A plurality of second vane pins 265 are provided, and each of the second vane pins 265 may be coupled to each of the left and right vanes 230.

The first vane pin 260 is disposed behind the second vane pin 265. The rear portion of the left and right vanes 230 to which the first vane pin 260 is coupled may rotate based on a front portion to which the second vane pin 265 is coupled.

That is, the rear portions of the plurality of left and right vanes 230 are connected to the link bar 240 by the first vane pin 260, and the plurality of left and right vanes 230 move the link bar 240 Accordingly, the second vane pin 265 may be rotated in the horizontal direction.

The drain pan 200 further includes a vane link 270 connecting the left and right vane motors 300 and the link bar 240. The vane link 270 is coupled to the motor shaft of the left and right vane motors 300 and extends laterally to be coupled to the link bar 240.

Link holes 276 penetrating in the left and right directions are formed in the vane link 270. In addition, a guide pin 275 may be inserted into the link hole 276. The guide pin 275 may pass through the link hole 276 and be coupled to the body bottom 211 of the fan body 210.

When the left and right vane motors 300 are driven, the vane link 270 can move in a left and right direction, and in this process, the guide pin 275 is moved in the left and right direction without the vane link 270 swinging in another direction. Guide it to move in a straight line.

15 is a cross-sectional view showing the configuration and air flow of an indoor unit according to an embodiment of the present invention.

Referring to FIG. 15, in the indoor unit 10 according to the embodiment of the present invention, air may be discharged through the lower discharge unit 126 and the front discharge unit 129.

In detail, when the blowing fan 40 is driven, the air sucked from the top of the indoor unit 10 is purified while passing through the filter assembly 80 and flows to the bottom of the indoor unit 10 while passing through the blowing fan 40. . At this time, the front panel 150 moves upward and is in an upper position.

In addition, when the upper and lower vane motor 162 is driven, the upper and lower vanes 160 may be moved by the action of the link 167 connected to the upper and lower vanes 160. In addition, the upper and lower vanes 160 may be in a position capable of opening the lower discharge part 126.

The air passing through the blowing fan 40 is guided by the upper and lower vanes 160 and may be discharged downward and forward through the open lower discharge part 126 and the front discharge part 129.

Meanwhile, a stable eccentric vortex is generated in a region between the stabilizer 250 and the blowing fan 40 by the stabilizer 250 located in the front and lower portions of the blowing fan 40, and accordingly, the discharge flow is blown. It can be prevented from being re-sucked toward the suction side of the fan 40, that is, toward the front.

And, as described above, the distance between the stabilizer 250 and the blowing fan 40 by the configuration of the first and second guide parts 252 and 253 is configured to be variable with respect to the axial direction, so that the stabilizer 250 In the space between) and the blowing fan 40, it is possible to prevent the occurrence of an air flow component in the axial direction.

16 is an experimental graph showing a change in noise according to the amount of air for a conventional stabilizer structure and a stabilizer structure according to the present embodiment, and FIG. 17 is a diagram for a conventional stabilizer structure and a stabilizer structure according to the present embodiment. , Is an experimental graph showing the change in power consumption according to the air volume, FIG. 18 is an experimental graph showing the static pressure change of the blowing fan according to the air volume for the conventional stabilizer structure and the stabilizer structure according to the present embodiment, and FIG. 19A And FIG. 19B is an experimental graph showing a change in noise according to a frequency of a blowing fan for the conventional stabilizer structure and the stabilizer structure according to the present embodiment.

First, referring to FIG. 16, in an indoor unit to which a stabilizer according to a conventional structure is applied and an indoor unit to which the stabilizer according to an embodiment of the present invention is applied, noise generated according to a change in air volume may vary. Here, the stabilizer according to the conventional structure may be understood as a structure in which a guide protrusion is not provided in the stabilizer, and the gap between the stabilizer and the blowing fan is uniformly formed in the axial direction.

In detail, as the amount of air discharged from the indoor unit increases, the noise (dB) generated from the indoor unit increases in both the conventional structure and the structure of the present invention. However, based on a predetermined air volume, the amount of noise generated in the structure of the present invention may be smaller than the size of the noise generated in the conventional structure. It can be seen that the same trend appears in the air volume section (8.0-12.0 CMM) that is generally generated in the indoor unit.

Next, referring to FIG. 17, as the amount of air discharged from the indoor unit increases, the power consumption (W) used in the indoor unit increases in both the conventional structure and the structure of the present invention. However, based on a predetermined air volume, the amount of power consumption used in the structure of the present invention may be less than the amount of power consumption generated in the conventional structure. It can be seen that the same trend appears in the air volume section (8.0-12.0 CMM) that is generally generated in the indoor unit.

Next, referring to FIG. 18, as the amount of air discharged from the indoor unit increases, the static pressure of the blowing fan 40 decreases in both the conventional structure and the structure of the present invention. However, based on the noise of the same size (under the same noise condition), the static pressure of the blowing fan 40 according to the structure of the present invention may be formed to be greater than the static pressure of the blowing fan according to the conventional structure by a set size (ΔP). . Therefore, it can be seen that the fan performance is improved. For example, the set size (ΔP) may be formed to 0.9mmAq.

In summary, the filter assembly 80 according to the exemplary embodiment of the present invention may be configured as a high-performance filter having excellent filtering effect, and accordingly, filter resistance (system resistance) is increased, and thus static pressure may decrease. However, by improving the structure of the stabilizer as in the present embodiment, it is possible to prevent a phenomenon in which the static pressure is reduced by the filter.

Next, FIG. 19A shows a change in the amount of noise generated according to a frequency change of a blowing fan according to a conventional structure. In the case of the conventional structure, noise (Np1) at about 1,000 Hz, which is a human audible frequency, represents about 40 dB.

On the other hand, referring to FIG. 19B, in the structure according to the present invention, noise Np2 at about 1,000 Hz, which is an audible frequency of humans, represents about 30 dB. It can be seen that by the structure of the blower fan 40 and the stabilizer 250 according to the present invention, as the air flow is stabilized, the peak noise caused by the flow collision is reduced, and the noise reduction effect is improved.

10: indoor unit 30: chassis
40: blowing fan 50: control box
60: heat exchanger 100: case
110: case body 120: grill frame
200: drain pan 210: pan body
230: left and right vanes 240: link bar
250: stabilizer 251: stabilizer body
252: first guide part 253: second guide part
255: guide connection 300: left and right vane motor

Claims (11)

A case provided with a heat exchanger;
A cross-flow fan provided in an axial direction inside the case and including a plurality of blades arranged in a circumferential direction with respect to the axial line; And
A drain pan supporting the heat exchanger and storing condensed water generated in the heat exchanger,
The drain pan includes a stabilizer disposed on the discharge side of the cross flow fan and facing the outer circumferential surface of the cross flow fan,
The stabilizer is an indoor unit of an air conditioner including a plurality of guide protrusions disposed on an edge side facing the cross-flow fan and provided in the axial direction. The method of claim 1,
The plurality of guide projections,
An indoor unit of an air conditioner configured to protrude from an outer surface of the stabilizer toward the cross-flow fan. The method of claim 2,
The plurality of guide projections are disposed to be spaced apart from each other in the axial direction,
An indoor unit of an air conditioner in which a distance from the stabilizer to an outer surface of the cross-flow fan increases and decreases in the axial direction by the plurality of guide protrusions. The method of claim 1,
The guide projection,
An indoor unit of an air conditioner comprising a first guide portion configured to increase a width protruding from a corner side of the stabilizer in a circumferential direction of the cross-flow fan. The method of claim 4,
The drain pan includes a pan body supporting the heat exchanger, and the stabilizer connected to the pan body and having an opposite surface facing the cross-flow fan,
An indoor unit of an air conditioner that forms a connection portion between the fan body and the stabilizer at a corner side of the stabilizer. The method of claim 4,
The guide projection,
Further comprising a second guide portion protruding with a width smaller than the protruding width of the first guide portion,
The indoor unit of the air conditioner is connected to the first guide of the second guide protrusion adjacent to the first guide protrusion among the plurality of guide protrusions. The method of claim 6,
The guide projection,
The indoor unit of the air conditioner further comprising a guide connecting portion connecting the side end portion of the first guide portion and the side end portion of the second guide portion. The method of claim 5,
The fan body,
A body bottom portion forming a bottom surface of the drain pan and supporting a lower portion of the heat exchanger, a body side portion extending upward from both sides of the body bottom portion, and a body front portion extending upward from a front of the body bottom portion,
An indoor unit of an air conditioner in which a condensed water storage space of the drain pan is defined by the bottom of the body, the side of the body, and the front of the body. The method of claim 8,
The stabilizer extends upward from the rear portion of the bottom of the body,
The plurality of guide protrusions are indoor units of an air conditioner arranged in a horizontal direction. The method of claim 8,
A plurality of left and right vanes provided in the axial direction on the bottom of the body and controlling the direction of the discharge air in the left and right directions; And
An indoor unit of an air conditioner further comprising a link bar connecting the plurality of left and right vanes. The method of claim 1,
The cross-flow fan is composed of a plurality of fan blocks in which blades are provided between two support plates spaced apart in the axial direction,
The plurality of guide protrusions are indoor units of an air conditioner arranged in a direction in which the plurality of fan blocks are arranged.

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