KR20230087064A - Ceiling type indoor unit of air conditioner - Google Patents

Abstract

The present invention relates to an indoor unit of a ceiling type air conditioner.
The indoor unit includes a first blowing fan and a second blowing fan installed in an inner space formed by the casing and the bottom panel and arranged side by side; and a partition wall device disposed between the first and second blowing fans to separate installation spaces of the first and second blowing fans.
The indoor unit is coupled to the bulkhead device, and the space on the first discharge side of the first blower fan and the second discharge side of the second blower fan prevent airflow discharged from the first blower fan from being re-sucked into the second blower fan. A mount bracket disposed between the spaces may be further included.

Description

Indoor unit of ceiling type air conditioner {Ceiling type indoor unit of air conditioner}

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

An air conditioner is a device for maintaining the air in a predetermined space in the most suitable state according to the use and purpose. In general, the air conditioner includes a compressor, a condenser, an expansion device, and an evaporator, and a refrigeration cycle that performs compression, condensation, expansion, and evaporation of refrigerant is driven to cool or heat the predetermined space. .

The predetermined space may be proposed in various ways according to a place where the air conditioner is used. For example, when the air conditioner is disposed in a home or office, the predetermined space may be an indoor space of the house or building.

When the air conditioner performs a cooling operation, the outdoor heat exchanger provided in the outdoor unit functions as a condenser and the indoor heat exchanger provided in the indoor unit performs the function of an evaporator. On the other hand, when the air conditioner performs a heating operation, the indoor heat exchanger functions as a condenser and the outdoor heat exchanger functions as an evaporator.

The indoor unit of the air conditioner may be classified into an upright type, a wall-mounted type, or a ceiling type type according to an installation location. The upright type indoor unit may be understood as an indoor unit installed to stand upright in an indoor space, the wall-mounted indoor unit installed to be attached to a wall surface, and the ceiling type indoor unit installed on a ceiling. there is.

A blowing fan for generating air flow may be installed in the ceiling-type indoor unit. In general, the blowing fan may include a cross-flow fan.

In the conventional ceiling-type indoor unit, the airflow discharged from the cross-flow fan does not go to the discharge part of the indoor unit and is sucked back into the cross-flow fan. This phenomenon lowered the ventilation efficiency of the indoor unit and acted as a cause of generating noise.

Prior literature information on the indoor unit of the ceiling type air conditioner is as follows.

1. Publication number (publication date): 10-2003-0072962 (September 19, 2003)

2. Title of Invention: Ceiling type air conditioner

An object of the present invention is to provide an indoor unit of a ceiling-type air conditioner having a guide device for stably guiding airflow discharged from the indoor unit.

An object of the present invention is to provide an indoor unit of a ceiling-type air conditioner having a guide device to prevent airflow discharged from a plurality of crossflow fans from interfering with each other or being re-sucked into the crossflow fans.

In an indoor unit provided with first and second cross-flow fans disposed side by side in a horizontal direction, the present invention is provided between the first and second cross-flow fans to prevent airflow discharged from the first cross-flow fan from being re-sucked into the second cross-flow fan. It is an object of the present invention to provide an indoor unit of an air conditioner of a ceiling type in which a guide device is disposed in a region of a ceiling.

The present invention is a ceiling-type air conditioner capable of preventing the generation of noise due to the re-intake of the air flow by the blower fan by allowing the air flow discharged from the first cross-flow fan to flow toward the outlet of the indoor unit instead of toward the second cross-flow fan. It is an object of the present invention to provide an indoor unit of

In an embodiment of the present invention, a guide device is disposed on one side of a blowing fan to prevent the air discharged from the blowing fan from being sucked back into the blowing fan, thereby preventing noise caused by driving the blowing fan and blowing performance. can improve

The blowing fan may include a cross-flow fan that sucks in air in a circumferential direction and discharges it in a circumferential direction.

The blowing fan may include a first cross-flow fan and a second cross-flow fan.

The first and second cross-flow fans are disposed side by side in a horizontal direction, and the guide device is disposed in an area between the first and second cross-flow fans so that the air discharged from the first cross-flow fan is sucked into the second cross-flow fan. sideways flow can be prevented.

The guide device may include a partition wall device provided between the first and second crossflow fans.

The partition wall device may include a partition plate separating the first and second crossflow fans into left and right sides.

The partition wall device may further include a bracket fastening portion protruding from the partition plate toward the rear guide and coupled to a mount bracket.

The barrier rib device may be disposed in a casing of the indoor unit.

The guide device may further include a mount bracket coupled to the partition wall device.

The mount bracket may be disposed on a bottom panel of the indoor unit.

The bulkhead device and the mount bracket are coupled to each other so that an internal space of the indoor unit can be divided into a first installation space in which the first cross-flow fan is installed and a second installation space in which the second cross-flow fan is installed.

The mount bracket may include a shielding portion for guiding air discharged from the first cross-flow fan to a discharge portion of the indoor unit.

The shield is located in a region between the first discharge air flow of the first cross-flow fan and the second discharge air flow of the second cross-flow fan to prevent the first discharge air flow from flowing toward the discharge side of the second cross-flow fan. can

A shaft fixing unit for fixing connecting shafts of the first and second cross-flow fans may be disposed on the second cross-flow fan.

The shaft fixing part is disposed adjacent to the inner side of the main plate of the second cross-flow fan, and a part of the blade of the second cross-flow fan may not be provided in a space where the shaft fixing part is disposed.

The shielding portion of the mount bracket may be disposed adjacent to a space in which the shaft fixing portion is disposed.

The indoor unit may include a rear guide provided adjacent to an outer circumferential surface of the blowing fan to guide suction or discharge of air current passing through the blowing fan.

The indoor unit may further include a stabilizer provided adjacent to an outer circumferential surface of a discharge side of the blowing fan to prevent air discharged from the blowing fan from being sucked back into the suction side of the blowing fan.

An indoor unit of a ceiling-type air conditioner according to an embodiment of the present invention includes a casing embedded in a ceiling; and a bottom panel provided at a lower end of the casing and forming a suction part for sucking air into the indoor space and a discharge part for discharging air into the indoor space.

The indoor unit includes a first blowing fan and a second blowing fan installed in an inner space formed by the casing and the bottom panel and arranged side by side; and a partition wall device disposed between the first and second blowing fans to separate installation spaces of the first and second blowing fans.

The indoor unit is coupled to the bulkhead device, and the space on the first discharge side of the first blower fan and the second discharge side of the second blower fan prevent airflow discharged from the first blower fan from being re-sucked into the second blower fan. A mount bracket disposed between the spaces may be further included.

The partition wall device may be provided on an inner surface of the casing so that the casing and the bottom panel are fixed, and the mount bracket may be supported by the bottom panel.

The rear guide may further include a rear guide disposed to surround outer circumferences of the first and second blowing fans and guiding air flow from the suction part to the discharge part.

a heat exchanger disposed on inlet sides of the first and second blowing fans; and a stabilizer disposed below the heat exchanger and disposed on discharge sides of the first and second blowing fans to generate eccentric vortices inside the first and second blowing fans. there is.

The stabilizer is configured to be recessed downward from an upper surface of the stabilizer, and a lowermost portion of the heat exchanger is positioned to form a drain space in which condensate is collected.

The mount bracket may include a blocking wall disposed on a path from a first discharge side space of the first blowing fan to a second discharge side space of the second blowing fan.

The mount bracket may include a first part coupled to the bottom panel; and a second part protruding from the first part in a direction toward the barrier rib device and having a fastening portion coupled to the barrier rib device.

The second part of the mount bracket has both side ends spaced apart in a direction in which the first blowing fan and the second blowing fan are arranged.

The both side ends may include first side ends positioned closer to the first blowing fan among the first and second blowing fans and forming open ends; and a second side end portion of the first and second blowing fans positioned closer to the second blowing fan and forming a shielding portion.

The second side end portion may define the blocking wall.

The shielding part may include a first shielding part extending linearly from the first and second blowing fans toward the discharge unit, and a second shielding part inclinedly extending from the first shielding part.

The first blowing fan includes a first main plate and a plurality of first blades, the second blowing fan includes a second main plate and a plurality of second blades facing the first main plate, and the first shield part An extension of may be formed to meet the second main plate of the second blowing fan.

The second blowing fan includes a shaft fixing part for fixing the connecting shafts of the first and second blowing fans and an installation space defining an empty space in which a part of the second blade is not formed to install the shaft fixing part, , A line extending from the end of the second shielding part toward the second blowing fan passes through the installation space.

A line extending from the first side end of the mount bracket toward the first blowing fan passes through the first main plate of the first blowing fan.

In the inner space of the mount bracket, a width in one direction of the second shielding part is larger than a width in one direction of the first shielding part, and the one direction may correspond to a direction in which the first and second blowing fans are arranged.

The first blowing fan and the second blowing fan may include a centrifugal fan that sucks in air in a circumferential direction and discharges air in a circumferential direction.

According to an embodiment of the present invention, airflow discharged from an indoor unit can be stably guided by providing a guide device.

According to an embodiment of the present invention, it is possible to prevent discharge airflows generated from a plurality of crossflow fans from interfering with each other or being re-sucked into the crossflow fans by the guide device.

According to an embodiment of the present invention, first and second cross-flow fans are provided that are arranged side by side in a horizontal direction, and a guide device is disposed in an area between the first and second cross-flow fans so that the air flow discharged from the first cross-flow fan is controlled. 2 Re-inhalation can be prevented by the cross-flow fan.

According to an embodiment of the present invention, the airflow discharged from the first crossflow fan flows toward the discharge portion of the indoor unit instead of toward the second crossflow fan, thereby preventing the generation of noise due to re-intake of the airflow by the blower fan.

1 is a bottom view showing the configuration of a ceiling type indoor unit according to an embodiment of the present invention.
2 is an exploded front perspective view showing a state in which a casing and a bottom panel of a ceiling type indoor unit according to an embodiment of the present invention are separated.
FIG. 3 is an enlarged view of part “A” in FIG. 2 .
4 is an exploded rear perspective view illustrating a state in which a casing and a bottom panel of a ceiling type indoor unit according to an embodiment of the present invention are separated.
FIG. 5 is an enlarged view of part “B” of FIG. 4 .
6 is an exploded perspective view of a ceiling type indoor unit according to an embodiment of the present invention.
7 is a cross-sectional view taken along line 7-7' in FIG. 1;
8 is a view showing first and second transverse blowing fans and a mount bracket disposed in a region between the first and second blowing fans according to an embodiment of the present invention.
9 is a view showing a state in which a mount bracket is disposed adjacent to a shaft fixing part of a second blowing fan according to an embodiment of the present invention.
10 is a perspective view showing the configuration of a mount bracket according to an embodiment of the present invention.
11 is a bottom view showing the configuration of a mount bracket according to an embodiment of the present invention.
12 is a side view showing the configuration of a mount bracket according to an embodiment of the present invention.
Figure 13a is a view showing the configuration of a mount bracket not provided with a shield according to the control group in order to contrast with the mount bracket according to an embodiment of the present invention.
13B is an experimental graph showing a change in noise generated when a mount bracket according to a control group is installed and first and second blower fans are driven.
14 is an experimental graph showing a change in noise generated when a mount bracket according to an embodiment of the present invention is installed and first and second blower fans are driven.
15A is an experimental graph showing a comparison of changes in air volume of an indoor unit with respect to revolutions of first and second blower fans when a control group and a mount bracket according to an embodiment of the present invention are installed.
15B is an experimental graph showing a comparison of changes in air volume versus noise of an indoor unit when a control group and a mount bracket according to an embodiment of the present invention are installed.
15C is an experimental graph showing a comparison of changes in noise versus rotation speed of first and second blower fans when a control group and a mount bracket according to an embodiment of the present invention are installed.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to components in the drawings, it should be noted that the same components have the same numerals as much as possible even if they are displayed on different drawings. In addition, in describing an embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function hinders understanding of the embodiment of the present invention, the detailed description will be omitted.

Also, terms such as first, second, A, B, (a), and (b) may be used to describe components of an embodiment of the present invention. These terms are only used to distinguish the component from other components, and the nature, order, or order of the corresponding component is not limited by the term. When an element is described as being “connected,” “coupled to,” or “connected” to another element, that element may be directly connected or connected to the other element, but there may be another element between the elements. It should be understood that may be "connected", "coupled" or "connected".

1 is a bottom view showing the configuration of a ceiling type indoor unit according to an embodiment of the present invention, and FIG. 2 is a front exploded perspective view showing a state in which a casing and a bottom panel of a ceiling type indoor unit according to an embodiment of the present invention are separated. FIG. 3 is an enlarged view of part “A” in FIG. 2 , FIG. 4 is an exploded rear perspective view showing a state in which a casing and a bottom panel of a ceiling type indoor unit according to an embodiment of the present invention are separated, and FIG. 5 is an exploded perspective view of FIG. FIG. 6 is an exploded perspective view of a ceiling type indoor unit according to an embodiment of the present invention, and FIG. 7 is a cross-sectional view taken along line 7-7' in FIG. 1 .

Referring to FIGS. 1 to 7 , an indoor unit 10 (hereinafter, referred to as “ceiling type indoor unit”) of a ceiling-type air conditioner according to an embodiment of the present invention may be installed to be buried in the ceiling.

The ceiling type indoor unit 10 may include a casing 110 and a bottom panel 120 .

The casing 110 may be buried in the inner space of the ceiling, and the bottom panel 120 may be coupled to a lower side of the casing 110 . The bottom panel 120 may be positioned at approximately the height of the ceiling and exposed to the outside.

The bottom panel 120 may include a panel body 121 having a substantially rectangular shape when viewed from below. The panel body 121 may be formed to protrude outward more than the lower end of the casing 110 so that a circumferential portion contacts the lower surface of the ceiling.

The panel body 121 may form an opening 123 defining a region through which air is sucked.

A suction grill 130 forming a suction part 135 for sucking air in the indoor space may be mounted on the bottom panel 120 . The intake grill 130 is disposed to cover the opening 123 , and the intake 135 may be formed at a position corresponding to the opening 123 .

The suction grill 130 may be detachably coupled to the bottom panel 120 .

A grill unit 136 may be provided in the suction grill 130 to prevent inflow of foreign substances through the suction unit 135 .

The suction part 135 may be formed long in the horizontal direction of the bottom panel 120 or the suction grill 130 .

A discharge part 122 for discharging air into an indoor space may be formed on the bottom panel 120 . The discharge part 122 may be formed long in the horizontal direction of the bottom panel 120 .

The ceiling type indoor unit 10 may further include a discharge vane 125 movably provided on one side of the discharge part 122 to adjust the amount or wind direction of air discharged through the discharge part 122. can

The discharge vane 125 can move to open or close the discharge part 122 . The discharge vane 125 may be supported by the bottom panel 120 .

A vane motor (not shown) for driving the discharge vane 125 and a vane link 125a rotating according to the drive of the vane motor may be provided on a side of the discharge vane 125 . The discharge vane 125 may be coupled to the vane link 125a.

A vane support 125b may be provided on an inner surface of the discharge vane 125 to support the discharge vane 125 on the bottom panel 120 . A plurality of the vane support portions 125b may be provided.

The ceiling type indoor unit 10 may include a louver 126 for controlling the direction of discharged air flow in the left and right directions. The louver 126 may be supported by the bottom panel 120 .

A plurality of the louvers 126 may be provided apart from each other in the horizontal direction.

The louvers 126 may be rotated in left and right directions based on a vertical line to control the left and right directions of discharge air flow. The plurality of louvers 126 are connected to the louver bar 126a and may rotate together according to the movement of the louver bar 126a. A louver motor (not shown) may be provided at a side of the discharge part 122 to provide a driving force to the louver bar 126a.

Referring to FIG. 1 , the lower end side of the bottom panel 120 is defined as a “front part” and the upper end side is defined as a “rear part”. The suction part 135 may be formed in the front part of the bottom panel 120 , and the discharge part 122 may be formed in the rear part of the bottom panel 120 .

When the first and second blowing fans 143 and 145 (see FIG. 6) are driven, the air in the indoor space is sucked into the casing 100 through the suction part 135, and in the heat exchanger (150, see FIG. 6). heat is exchanged The air passing through the heat exchanger 150 flows along the outer circumferential surfaces of the first and second blowing fans 143 and 145 and can be discharged through the discharge part 122 of the bottom panel 120 .

A number of parts may be installed in the inner space of the indoor unit formed by the casing 110 and the bottom panel 120 .

The plurality of components may include a fan assembly 140 driven to suck in and discharge indoor air.

The fan assembly 140 may include a fan motor 141 generating driving force and blowing fans 143 and 145 . The fan motor 141 may be disposed on a side of the blowing fans 143 and 145 . The fan motor 141 and the blowing fans 143 and 145 may be axially coupled.

The blowing fans 143 and 145 may include a plurality of blowing fans. For example, the plurality of blowing fans may include a first blowing fan 143 and a second blowing fan 145 .

The first and second blowing fans 143 and 145 may be arranged side by side in the left and right directions.

The first and second blowing fans 143 and 145 may include cross-flow fans that suck in air in a circumferential direction and discharge it in a circumferential direction.

The first and second blowing fans 143 and 145 are connected by a connecting shaft 146 (see FIG. 8) and can rotate together. The connecting shaft 146 is provided between the first blowing fan 143 and the second blowing fan 145, and extends from the first blowing fan 143 in a left-right direction to the second blowing fan 145. ) can be combined.

The plurality of parts include a heat exchanger 150 that exchanges heat with air sucked into the casing 110 . The heat exchanger 150 obliquely extends upward with respect to the bottom panel 120 and may be disposed on a suction side of the fan assembly 140 based on air flow.

A drain pan 155 for collecting condensed water may be provided below the heat exchanger 150 .

The plurality of components may include a stabilizer 170 disposed below the heat exchanger 150 . The stabilizer 170 may be disposed to face the outer circumferential surfaces of the first and second blowing fans 143 and 145 .

The stabilizer 170 is disposed on the discharge side of the first and second blowing fans 143 and 145 and generates a stable eccentric vortex inside the first and second blowing fans 143 and 145 to improve discharge flow performance. can be understood as

The stabilizer 170 may be disposed adjacent to lower ends of the first and second blowing fans 143 and 145 . In detail, the stabilizer 170 is installed at the discharge side of the first and second blowing fans 143 and 145 to be spaced apart from the outer circumferential surfaces of the first and second blowing fans 143 and 145, so that the first and second blowing fans 143 and 145 It is possible to prevent the air discharged from from flowing backward toward the heat exchanger 150.

A relatively small space may be formed between the stabilizer 170 and the outer circumferential surfaces of the first and second blowing fans 143 and 145 . Also, the stabilizer 170 may be extended along the axial direction of the first and second blowing fans 143 and 145 .

The stabilizer 170 may form a drain space. In detail, the upper surface of the stabilizer 170 may have a shape that is recessed downward, and the recessed space may form a drain space 170a for collecting condensed water generated in the heat exchanger 150 .

In the drain space 170a, the lowermost part of the inclined heat exchanger 150 may be located. The drain pan 155 may be located below the central part and upper part of the heat exchanger 150 .

The plurality of components may further include a rear guide 160 provided on an inner surface of the casing 110 and covering portions of outer circumferential surfaces of the first and second blowing fans 143 and 145 .

The rear guide 160 functions as a flow guide for guiding the airflow sucked into the first and second blowing fans 143 and 145 toward the discharge unit 122 .

The rear guide 160 may include a first guide part 161 disposed on an upper inner surface of the casing 110 . The first guide part 161 may have a linear plate shape.

The rear guide 160 may include a second guide part 165 that extends roundly from the first guide part 161 toward the rear of the indoor unit.

The second guide part 165 may include a guide rib 168 extending in a round shape. The guide rib 168 may include a guide rib 168 protruding from one surface of the second guide part 165 and guiding air flow. One surface of the second guide part 165 may be understood as a surface facing the outer circumferential surfaces of the first and second blowing fans 143 and 145 . A plurality of guide ribs 168 may be provided in the left and right directions.

The plurality of parts may further include a filter 180 disposed inside the intake grill 130 to filter foreign substances in the air. The filter 180 may be disposed on the inlet side of the heat exchanger 150 .

The plurality of components may further include a PCB device 190 that controls the operation of the ceiling type indoor unit 10 . The PCB device 190 may be disposed on a path through which air sucked through the intake grill 130 flows into the heat exchanger 150 . The PCB device 190 may be cooled by the air.

The ceiling type indoor unit 10 may further include guide devices 210 and 250 for guiding the air passing through the first and second blowing fans 143 and 145 to stably flow to the discharge part 122 .

The guide devices 210 and 250 may include a partition wall device 210 separating discharge areas of the first and second blowing fans 143 and 145 .

The barrier rib device 210 may be provided in the casing 110 .

The barrier rib device 210 may be disposed in contact with or adjacent to an inner surface of the rear guide 160 . For example, the barrier rib device 210 may be placed in contact with or adjacent to the inner surface of the second guide part 165 .

The barrier rib device 210 may be disposed in a space between two guide ribs 168 among the plurality of guide ribs 168 .

The partition wall device 210 is provided between the first and second blowing fans 143 and 145 to separate the discharge area of the first blowing fan 143 and the discharge area of the second blowing fan 145. there is. The flow of air discharged from one of the first blowing fan 143 and the second blowing fan 145 toward the other blowing fan can be reduced by the barrier rib device 210 .

The barrier rib device 210 may include a barrier plate 211 provided between the first and second blowing fans 143 and 145 . When the first and second blowing fans 143 and 145 are divided into a suction side area and a discharge side area, the partition plate 211 has a shape of a semi-circular plate so as to be disposed between the discharge side areas of the first and second blowing fans 143 and 145. can have

The partition wall device 210 may further include a bracket fastening part 213 protruding from the partition plate 211 toward the inner surface of the rear guide 160 . The bracket fastening part 213 may be disposed to contact or be adjacent to an inner surface of the rear guide 160 , that is, an inner surface of the second guide part 165 .

The bracket fastening part 213 may be coupled with the mount bracket 250 . A bracket fastening hole 214 is formed in the bracket fastening part 213 , and a predetermined fastening member can be inserted into the bracket fastening hole 214 and fastened to the mount bracket 250 .

When the partition wall device 210 and the mount bracket 250 are coupled, the mount bracket 250 may extend from the partition wall device 210 toward the discharge unit 122 .

The guide devices 210 and 250 include a mount bracket 250 for guiding the discharged air flow toward the discharge unit 122 to prevent the air discharged from the first blower fan 143 from being re-sucked into the second blower fan 145. may further include.

The mount bracket 250 is provided on the bottom panel 120 and may extend from the bottom panel 120 toward the partition wall device 210 .

The mount bracket 250 may be disposed in a space between two louvers 126 among the plurality of louvers 126 .

The mount bracket 250 may be provided between the respective discharge side spaces of the first and second blowing fans 143 and 145 . Each discharge side space of the first and second blowing fans 143 and 145 may be understood as a space between the outer peripheral surface of the discharge side of the first and second blowing fans 143 and 145 and the discharge part 122 of the indoor unit.

The mount bracket 250 may be disposed between a first discharge side space of the first blowing fan 143 and a second discharge side space of the second blowing fan 145 .

The mount bracket 250 may be fastened to the bottom panel 120 .

The mount bracket 250 may include a first part 251 fastened to the first part of the bottom panel 120 .

The first part 251 may include a first panel fastening part 251a that can be fastened to the panel bracket 124 of the bottom panel 120 . A predetermined fastening member may be inserted into the first panel fastening part 251a and fastened to the panel bracket 124 . For example, the panel bracket 124 may be configured to protrude rearward from a rear surface of the bottom panel 120 .

The mount bracket 250 may include a second part 252 protruding from the first part 251 toward the partition device 210 or the first and second blowing fans 143 and 145 .

The second part 252 may have a bent shape. The second part 252 has a part extending upward from the first part 251 toward the partition wall device 210 and a part extending in the horizontal direction from the part and coupled to the partition wall device 210 It may include another part having a bonding surface.

The other part may form a partition wall fastening hole 254 fastened to the bracket fastening part 213 of the partition wall device 210 . A predetermined fastening member may be inserted into the bulkhead fastening hole 254 and coupled to the bracket fastening hole 214 .

The mount bracket 250 may further include a third part 253 coupled to the bottom panel 120 by bending the second part 252 in a direction toward the bottom panel 120 .

It may be understood that the first and third parts 251 and 253 form “support legs” for supporting the mount bracket 250 to the bottom panel 120 . The second part 252 may be understood to form a “coupling bracket” for coupling the mount bracket 250 to the partition wall device 210 .

The mount bracket 250 further includes a shielding portion 255 serving as a “blocking wall” to prevent the air discharged from the first blowing fan 143 from being re-sucked into the suction side of the second blowing fan 145. can do.

The shielding part 255 is disposed between a first discharge space defined below the first blowing fan 143 and a second discharge space defined below the second blowing fan 145, It may perform a function of separating the first discharge space and the second discharge space.

The shielding part 255 blocks the air flow discharged from the first blowing fan 143 from flowing in the horizontal direction toward the suction side of the second blowing fan 145, and the air flows through the shielding part 255. It may flow downward along the surface of and be discharged through the discharge part 122.

The shielding part 255 may form one side of the mount bracket 250 .

The one side may be understood as a side of the mount bracket 250 extending linearly or bent in the vertical direction.

8 is a view showing first and second cross-flow fans according to an embodiment of the present invention and a mount bracket disposed in an area between the first and second cross-flow fans, and FIG. 9 is a view showing a second cross-flow fan according to an embodiment of the present invention. It is a view showing a mount bracket disposed adjacent to a shaft fixing part of a fan, FIG. 10 is a perspective view showing a configuration of a mount bracket according to an embodiment of the present invention, and FIG. 11 is a mount bracket according to an embodiment of the present invention. A bottom view showing the configuration of, Figure 12 is a side view showing the configuration of the mount bracket according to an embodiment of the present invention.

Referring to FIGS. 8 to 12 , the mount bracket 250 according to the embodiment of the present invention may be disposed in the discharge side regions D2 and D2 of the first and second blowing fans 143 and 145 .

The mount bracket 250 may be disposed between the discharge side area D1 of the first blowing fan 143 and the discharge side area D2 of the second blowing fan 143 .

The mount bracket 250 is supported on the bottom panel 120 and may be configured to be coupled to the bulkhead device 210 .

The first blowing fan 143 may include a first main plate 143a to which a connecting shaft 146 is coupled. The second blowing fan 145 may include a second main plate 145a to which the connection shaft 146 is coupled.

The first and second main plates 143a and 145b may be disposed to face each other.

The first and second main plates 143a and 145a are spaced apart from each other in the horizontal direction, and the connection shaft 146 may extend in the horizontal direction between the first and second main plates 143a and 145a.

The first blowing fan 143 may further include a first support plate 143b spaced apart from the first main plate 143a in a horizontal direction. A plurality of first support plates 143b may be spaced apart from each other in the horizontal direction.

The first blowing fan 143 includes a plurality of first blades 143c disposed between the first main plate 143a and the first support plate 43b and between two adjacent first support plates 143b. ) may be included.

The plurality of first blades 143c may be arranged in a circumferential direction of the first blowing fan 143 .

The plurality of first blades 143c may be disposed inclined with respect to the imaginary extension line ℓ1 extending in the horizontal direction so that the airflow discharged from the first blowing fan 143 may be formed by being deflected.

For example, referring to FIG. 8 , the plurality of first blades 143c may be disposed inclined upward by a first set angle θ1 with respect to the extension line ℓ1. With this configuration, the airflow discharged from the first blowing fan 143 may not be directed directly below the first blowing fan 143, but may be directed downward to the right. At this time, the second blowing fan 145 is disposed on the right side of the first blowing fan 143 .

When such a deflected air flow is formed, noise generated from the first blowing fan 143 can be reduced.

The second blowing fan 145 includes a second supporting plate (not shown) and a plurality of second blades 145c having the same configuration as the first supporting plate 143b and the first blade 143c described in the first blowing fan. can include

The plurality of second blades 145c may be inclined with respect to an imaginary extension line ℓ1 extending in the horizontal direction so that airflow discharged from the second blowing fan 145 may be formed by being deflected.

For example, referring to FIG. 8 , the plurality of second blades 145c may be disposed inclined upward with respect to the extension line ℓ1. With this configuration, the airflow discharged from the second blowing fan 145 may be directed downward to the right instead of directly below the second blowing fan 145 .

When such a deflected air flow is formed, noise generated from the second blowing fan 145 can be reduced.

The second blowing fan 145 may further include a shaft fixing part 147 for stably fixing the connection shaft 146 . The shaft fixing part 147 may be located inside the second main plate 145a.

The second blower fan 145 may form an empty space 145f where some of the plurality of blades are not disposed so that a space in which at least a portion of the shaft fixing part 147 is disposed is secured. The empty space 145f may be defined as an “installation space”.

The empty space 145f may be defined by the first extension plate 145d, the second extension plate 145e, and the blade 145c. The first extension plate 145d may extend from the second main plate 145a in a direction away from the first main plate 143a.

The second extension plate 145e may extend in a direction crossing the first extension plate 145d. For example, the second extension plate 145e may extend in a direction substantially parallel to the second main plate 145a.

When the first and second blowing fans 143 and 145 are driven, when air flows into the empty space 145f, a surging flow is generated, and accordingly, there is a concern that noise may be greatly generated.

In particular, when the airflow discharged from the first blowing fan 143 flows into the empty space 145f of the second blowing fan 145, this phenomenon may appear severe.

To prevent this phenomenon, a mount bracket 250 may be installed in a path through which the air discharged from the first blowing fan 143 flows to the second blowing fan 145 .

The mount bracket 250 may include a first part 251 and a third part 253 fastened to the bottom panel 120 . A first panel fastening part 251a fastened to the bottom panel 120 is formed in the first parts 251 and 253, and a second panel fastening part 251a fastened to the bottom panel 120 is formed in the third part 253. A portion 253a may be formed.

The first part 251 may form a rear part of the mount bracket 250 , and the third part 253 may form a front part of the mount bracket 250 .

The mount bracket 250 may include a second part 252 fastened to the partition wall device 210 . The second part 252 may form an upper surface portion of the mount bracket 250 . A partition wall fastening hole 254 may be formed in the second part 252 .

Both ends of the mount bracket 250 may be spaced apart in a horizontal direction in which the first and second blowing fans 143 and 145 are arranged.

Among both ends of the mount bracket 250, a side end closer to the first blowing fan 143 than the second blowing fan 145 forms a first side end 257a.

When the first side end portion is extended forward, an extension line of the first side end portion may be formed to meet the first main plate 143a of the first blowing fan 143. That is, the extension line of the first side end and the first main plate may be located on the same line based on the left and right directions.

The first side end 257a may form an open end.

Due to the arrangement of the inclined blades 143c of the first blowing fan 143, the airflow discharged from the first blowing fan 143 flows in a direction toward the first side end 257a, and the opening It may flow into the inside of the mount bracket 250 through the first side end 257a.

Among both ends of the mount bracket 250, a side end closer to the second blowing fan 145 than the first blowing fan 143 forms a second side end 257b.

The second side end portion 257b may form a closed end portion. The closed end portion may form a shielding portion 255 defining a blocking wall to prevent air flow from passing therethrough.

The shielding part 255 may include a first shielding part 255a extending linearly downward and a second shielding part 255 extending obliquely from the first shielding part 255a.

When the first shielding part 255a is extended forward, the extension line of the first shielding part 255a may be formed to meet the second main plate 145a of the second blowing fan 145 . That is, the extension of the first shield part and the second main plate may be located on the same line based on the left and right directions.

The second shielding part 255b may extend obliquely downward from the first shielding part 255a in a direction away from the first main plate 143a.

When the lower end of the second shielding part 255b is extended forward, an extension line of the second shielding part 255b may pass through the empty space 145f. For example, based on the left-right direction, the extension line of the second shielding part 255b may be positioned on the same line as the second extension plate 145e defining the empty space 145f.

The left and right widths of the inner space of the mount bracket 250 at the position where the second shielding part 255b is formed are larger than the left and right widths of the inner space of the mount bracket 250 at the position where the first shielding part 255a is formed It can be.

Air introduced into the mount bracket 250 through the first side end portion 257a may be prevented from flowing toward the second blowing fan 145 by the shielding portion 255 . Air may be guided by the first shielding part 255a and the second shielding part 255b and flow toward the discharge part 122 of the bottom panel 120 .

In this way, since the air discharged from the first blowing fan 143 is not re-sucked into the second blowing fan 145 side, particularly into the area where the empty space 145f is formed, occurrence of surging flow can be prevented. there is. As a result, noise may be generated on the side of the second blowing fan 145 .

13a is a view showing the configuration of a mount bracket not provided with a shield according to a control group in order to contrast with a mount bracket according to an embodiment of the present invention, and FIG. 13b is a view showing a mount bracket according to a control group installed and first and second crossflow 14 is an experimental graph showing a change in noise generated when the fan is driven, and FIG. 14 is an experimental graph showing a change in noise generated when the first and second cross-flow fans are driven with a mount bracket installed according to an embodiment of the present invention.

13A shows a structure in which a shield is not provided in the mount bracket according to an embodiment of the present invention, that is, a structure in which both ends of the mount bracket have an open shape (control group).

13B shows a change in noise generated over time when the first and second blower fans are driven after the mount bracket according to the control group is installed in the ceiling type indoor unit.

Referring to FIG. 13B , it can be seen that there is a section (dotted line section) in which the size of noise (wind noise) greatly increases at irregular intervals with the lapse of time. The generation of such noise may decrease the reliability of the product and cause discomfort to the user.

On the other hand, FIG. 14 shows a change in noise generated over time when the first and second blower fans are driven after the mount bracket according to the embodiment of the present invention is installed in the ceiling type indoor unit.

Referring to FIG. 14 , it can be seen that the level of noise is formed substantially constant with the lapse of time without greatly changing. In this way, if the change in noise is not large, the reliability of the product can be increased and the user can feel comfortable.

15A is an experimental graph showing a comparison of changes in air volume of an indoor unit versus rotational speed of first and second blowing fans when a control group and a mount bracket according to an embodiment of the present invention are installed, and FIG. When the mount bracket according to the embodiment is installed, it is an experimental graph showing a comparison of the change in air volume versus noise of the indoor unit, and FIG. This is an experimental graph showing the comparison of the change in noise versus the number of revolutions of the blowing fan.

First, referring to FIG. 15A, as the number of revolutions of the first and second blowing fans increases, the air volume of the control group and the indoor unit according to the present invention increases.

As the number of revolutions increases, the air volume of the indoor unit according to the present invention may be greater than that of the indoor unit in the control group. It can be seen that the amount of air blown increases by preventing the airflow discharged from the first blower fan from being re-sucked into the second blower fan by the shielding part of the mount bracket.

Referring to FIG. 15B, as the air volume of the indoor unit increases, the noise of the control unit and the indoor unit according to the present invention increases.

As the air volume of the indoor unit increases, the noise of the indoor unit according to the present invention may be less than that of the control group. From this, it can be seen that the shielding part of the mount bracket prevents the airflow discharged from the first blowing fan from being re-sucked into the second blowing fan, thereby preventing the surging flow and thereby reducing the noise.

Referring to FIG. 15C , as the number of revolutions of the first and second blowing fans increases, the noise of the control group and the indoor unit according to the present invention increases.

As the number of revolutions of the first and second blower fans increases, noise of the indoor unit according to the present invention may be less than that of the indoor unit of the control group. From this, it can be seen that the shielding part of the mount bracket prevents the airflow discharged from the first blowing fan from being re-sucked into the second blowing fan, thereby preventing the surging flow and thereby reducing the noise.

10: ceiling type indoor unit 110: casing
120: bottom panel 130: suction grill
140: fan assembly 143; 1st blowing fan
145: second blowing fan 150: heat exchanger
160: rear guide 170: stabilizer
180: filter assembly 210: bulkhead device
250: mount bracket 255: shield

Claims (15)

Casing embedded in the ceiling;
a bottom panel provided at a lower end of the casing and forming a suction part for sucking air into the indoor space and a discharge part for discharging air into the indoor space;
a first blowing fan and a second blowing fan installed in an inner space formed by the casing and the bottom panel and arranged side by side;
a partition wall device disposed between the first and second blowing fans to separate installation spaces of the first and second blowing fans; and
It is coupled to the partition wall device, and between the first discharge side space of the first blowing fan and the second discharge side space of the second blowing fan so that the airflow discharged from the first blowing fan is not re-sucked into the second blowing fan side. An indoor unit of a ceiling-type air conditioner including a mount bracket disposed on. According to claim 1,
The partition wall device is provided on an inner surface of the casing so that the casing and the bottom panel are fixed, and the mount bracket is supported by the bottom panel. According to claim 1,
The indoor unit of the ceiling-type air conditioner further includes a rear guide disposed to surround outer circumferences of the first and second blowing fans and guiding air flow from the suction part to the discharge part. According to claim 1,
a heat exchanger disposed on inlet sides of the first and second blowing fans; and
A ceiling type further comprising a stabilizer disposed below the heat exchanger and disposed on a discharge side of the first blowing fan and the second blowing fan so that eccentric vortices are generated inside the first blowing fan and the second blowing fan. The indoor unit of the type air conditioner. According to claim 4,
The stabilizer,
An indoor unit of a ceiling-type air conditioner configured to be recessed downward from an upper surface of the stabilizer and forming a drain space in which condensate is collected at a lowermost part of the heat exchanger. According to claim 1,
The mount bracket includes a blocking wall disposed on a path from the first discharge side space of the first blower fan to the second discharge side space of the second blower fan. According to claim 6,
The mount bracket,
a first part coupled to the bottom panel; and
An indoor unit of a ceiling type air conditioner comprising a second part protruding from the first part in a direction toward the partition wall device and having a fastening portion engaged with the partition wall device. According to claim 7,
The second part of the mount bracket has both side ends spaced apart in a direction in which the first blowing fan and the second blowing fan are arranged,
Both side ends,
a first side end portion of the first and second blowing fans positioned closer to the first blowing fan and forming an open end portion; and
An indoor unit of a ceiling type air conditioner including a second side end portion of the first and second blowing fans positioned closer to the second blowing fan and forming a shielding portion. According to claim 8,
The second side end portion defines the blocking wall. According to claim 8,
The shielding part is a ceiling type air conditioner including a first shielding part extending linearly from the first and second blowing fans in a direction toward the discharge part and a second shielding part extending obliquely from the first shielding part. indoor unit. According to claim 10,
The first blowing fan includes a first main plate and a plurality of first blades, and the second blowing fan includes a second main plate and a plurality of second blades facing the first main plate,
The extension line of the first shielding part is formed to meet the second main plate of the second blowing fan. According to claim 11,
The second blowing fan includes a shaft fixing part for fixing the connecting shafts of the first and second blowing fans and an installation space defining an empty space in which a part of the second blade is not formed to install the shaft fixing part, ,
An indoor unit of a ceiling-type air conditioner, characterized in that a line extending from an end of the second shielding part toward the second blowing fan passes through the installation space. According to claim 11,
A line extending from the first side end of the mount bracket toward the first blowing fan passes through the first main plate of the first blowing fan. According to claim 10,
In the inner space of the mount bracket, the one-way width of the second shielding part is formed larger than the one-way width of the first shielding part,
The one direction corresponds to the direction in which the first and second blowing fans are arranged, the indoor unit of the ceiling-type air conditioner. According to claim 1,
The first blowing fan and the second blowing fan include centrifugal fans that suck in air in a circumferential direction and discharge air in a circumferential direction.

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