KR20170014447A - Indoor unit for air conditoiner - Google Patents

Indoor unit for air conditoiner Download PDF

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Publication number
KR20170014447A
KR20170014447A KR1020150107836A KR20150107836A KR20170014447A KR 20170014447 A KR20170014447 A KR 20170014447A KR 1020150107836 A KR1020150107836 A KR 1020150107836A KR 20150107836 A KR20150107836 A KR 20150107836A KR 20170014447 A KR20170014447 A KR 20170014447A
Authority
KR
South Korea
Prior art keywords
cabinet
supporter
mounting portion
condensate pump
inner case
Prior art date
Application number
KR1020150107836A
Other languages
Korean (ko)
Other versions
KR101742878B1 (en
Inventor
최병걸
박종욱
Original Assignee
엘지전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Priority to KR1020150107836A priority Critical patent/KR101742878B1/en
Priority to CN201610591320.8A priority patent/CN106403016B/en
Priority to ES16181630T priority patent/ES2746151T3/en
Priority to EP16181630.1A priority patent/EP3124888B1/en
Priority to US15/223,201 priority patent/US10054320B2/en
Publication of KR20170014447A publication Critical patent/KR20170014447A/en
Application granted granted Critical
Publication of KR101742878B1 publication Critical patent/KR101742878B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise
    • F24F2001/0037—
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise
    • F24F2013/242—Sound-absorbing material

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices For Blowing Cold Air, Devices For Blowing Warm Air, And Means For Preventing Water Condensation In Air Conditioning Units (AREA)

Abstract

According to an embodiment of the present invention, an indoor unit for an air conditioner comprises: a cabinet which is installed on the ceiling of an indoor space; a blower fan which is placed on the inside of the cabinet; a heat exchanger which is placed in the cabinet; a panel which shields the cabinet and which comprises: an inlet through which indoor air is sucked up; and an outlet through which the air, whose heat is exchanged, is discharged; a drain pan assembly which is placed in the cabinet and which collects condensate which is generated by the heat exchanger; a condensate pump which is mounted on the cabinet and which intakes and discharges the condensate which is collected by the drain pan; and a mounting unit which protrudes from an internal side surface of the cabinet and has the condensate pump mounted thereon. The mounting unit protrudes along an internal edge of the cabinet for a shorter height than the width of the bottom surface of the condensate pump. The present invention aims to provide an indoor unit for an air conditioner which is able to increase the flux and reduce noise.

Description

Indoor unit for air conditioner < RTI ID = 0.0 >

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

In general, an air conditioner is a cooling / heating system for cooling or heating a city by an operation of sucking indoor air and exchanging heat with coolant of low or high temperature and discharging it to the room, And a valve-evaporator.

Particularly, the air conditioner mainly comprises an outdoor unit (also referred to as an 'outdoor side' or a 'heat radiating side') installed in an outdoor space and an indoor unit (also referred to as an 'indoor side' or ' A condenser (outdoor heat exchanger) and a compressor are installed in the outdoor unit, and an evaporator is installed in the indoor unit (indoor heat exchanger).

As is well known, the air conditioner can be broadly divided into a separate type air conditioner in which an outdoor unit and an indoor unit are separated from each other, and an integral type air conditioner in which an outdoor unit and an indoor unit are integrally installed. In consideration of installation space and noise, Harmonics are preferred.

In the multi-type air conditioner of the separate type air conditioner, a plurality of indoor units are connected to one outdoor unit, and the indoor units are installed in the room for air conditioning, thereby providing a plurality of air conditioners.

Among indoor units of the multi-type air conditioner, indoor units of a cassette type air conditioner installed in the ceiling of the indoor space for cooling and heating the indoor space are widely used.

A typical structure of such a cassette type air conditioner is disclosed in Korean Patent Publication No. 10-2014-079108.

1 and 2 of Korean Patent Laid-Open Publication No. 10-2014-079108, there is provided a condensate pump for pumping condensate into the inside of a main body installed in a ceiling to discharge the condensate to the outside, The mounting portion is protruded inward and then protruded to have a predetermined height so as to be in contact with the drain.

However, in such a structure, in order to support the condensate pump, the mounting portion is protruded into the space inside the main body by a cross-sectional area corresponding to the area of the lower surface of the condensate pump. Therefore, air flowing along the wall surface of the inside of the main body when the air is blown by the blowing fan hits the mount portion, and the increase of the flow resistance due to the air causes a decrease in flow rate and noise.

It is an object of the present invention to provide an indoor unit of an air conditioner which can provide a support structure of a condensate pump provided on a flow path inside a cabinet and at the same time reduce a flow path resistance inside a cabinet, .

An indoor unit of an air conditioner according to an embodiment of the present invention includes a cabinet installed on a ceiling of an indoor space; A blowing fan provided inside the cabinet; A heat exchanger provided inside the cabinet; A panel having a suction port for shielding the cabinet and sucking indoor air, and a discharge port for discharging the heat-exchanged air; A drain pan assembly provided in the cabinet for collecting condensate generated in the heat exchanger; A condensate pump mounted in the cabinet for sucking and discharging the condensed water collected in the drain pan; And a mounting portion protruding from an inner surface of the cabinet and mounted with the condensing pump, wherein the protruding thickness of the mounting portion protrudes along an inner edge of the cabinet and is smaller than a width of a lower surface of the condensate pump .

The cabinet includes: an out plate that forms an outer appearance of the cabinet; And an inner case which is in contact with the outflow rate and forms an inner shape of the cabinet.

And the mounting portion is formed integrally with the inner case.

The mounting portion is formed of a material different from that of the inner case, and is fixedly mounted inside the inner case.

The upper surface of the mounting portion connects both sides of the mounting portion extending in a direction intersecting with each other, and a supporter to which the condensate pump is fixed is mounted.

The upper surface of the mounting portion is formed of a metal or plastic material, and a mounting bracket for fastening a screw penetrating the supporter is mounted.

And the supporter accommodates the entire lower surface of the condensate pump.

The supporter is provided with a seating portion protruding upward and separating the condensed water pump, and an opening is formed in the supporter below the condensed water pump.

A rim protruding from the outer side of the supporter and around the opening and a reinforcing rib connecting the outer side of the supporter and the rim of the opening are further formed.

And a guide portion extending downward from the lower surface of the supporter and guiding a mounting position of the supporter in contact with a side surface of the mounting portion.

At least a part of the circumference of the supporter is formed in a shape corresponding to the edge of the inner surface of the inner case and is in close contact with each other.

And at least one of the seating portions fixed to the condensate pump with the supporter mounted thereon is extended to the inside of the cabinet more than the edge of the projection.

According to the present invention having the above-described configuration, the following effects can be expected.

First, the protrusion of the mounting portion for supporting the condensed water pump can be minimized, so that the flow resistance can be reduced and the flow rate can be increased and the noise can be reduced.

Secondly, by providing a supporter across the mounting portion on the upper surface of the mounting portion, it is possible to stably support the condensate pump while narrowing the protruding portion of the mounting portion.

Thirdly, by adding a mounting bracket to the mounting portion formed of a heat insulating material and having a reduced strength, it is possible to provide a stable mounting structure while reducing a fixing portion with the condensed water pump.

1 is a perspective view of an indoor unit of an air conditioner according to an embodiment of the present invention.
2 is an exploded perspective view of the indoor unit.
3 is a perspective view showing a structure of an interior of a cabinet of an indoor unit according to an embodiment of the present invention.
4 is an exploded perspective view showing a mounting structure of a condensed water pump according to an embodiment of the present invention.
5 is a perspective view of the supporter according to the embodiment of the present invention as viewed from above.
6 is a perspective view of the supporter as viewed from below.
7 is a view showing the air flow inside the cabinet.
8 is a view showing a driving state of the condensed water pump.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. However, it should be understood that the present invention is not limited to the embodiment shown in the drawings, and that other embodiments falling within the spirit and scope of the present invention may be easily devised by adding, .

1 is a perspective view of an indoor unit of an air conditioner according to an embodiment of the present invention. 2 is an exploded perspective view of the indoor unit.

As shown in the drawings, an indoor unit 1 of an air conditioner according to an embodiment of the present invention (hereinafter referred to as "indoor unit") includes a cabinet 10 inserted into a ceiling of an indoor space as a whole, And a panel 20 and a suction grille 21 which are exposed to the lower side of the ceiling when the indoor unit is installed.

In the cabinet 10, a heat exchanger 30 for heat exchange with air to be sucked, a blowing fan 40 for forced suction and discharge of indoor air, and air sucked toward the blowing fan 40 A drain pan assembly 60 for collecting the condensed water generated in the heat exchanger 30, and a condensate pump 70 for discharging the collected condensed water to the outside.

The panel 20 may be mounted on the lower end of the cabinet 10 and may have a substantially rectangular shape when viewed from below. The panel 20 may be formed so as to protrude further outward than the lower end of the cabinet 10 so that the periphery thereof contacts the lower surface of the ceiling.

The panel 20 may have a discharge port 22 serving as an outlet for air discharged through the cabinet 10. The discharge ports 22 are formed on opposite sides of the panel 20 so as to correspond to the outer ends of the cabinet 10. The discharge port 22 may be elongated along the longitudinal direction of the panel 20 and may be opened or closed by a vane 23 mounted on the panel 20.

A suction grille 21 is mounted at a central portion of the panel 20 to form a part of the bottom surface of the indoor unit 1. [ The suction grille 21 is disposed between the pair of discharge ports 22 and may be formed in a plate shape capable of shielding the opening at the center of the panel 20.

The suction grille 21 forms a passage for air flowing into the indoor unit 1. That is, at least a part of the suction grille 21 may be formed in a grill or lattice shape so that indoor air can flow smoothly.

3 is a perspective view showing the structure of the interior of the cabinet of the indoor unit according to the embodiment of the present invention.

As shown in the drawing, the cabinet 10 may include an outer plate 11 forming an outer appearance and an inner case 12 provided inside the outer plate 11. As shown in FIG.

The out plate 11 may be configured to form an outer appearance of the cabinet 10 in which a plate-shaped steel material is opened. The out plate 11 may be formed by combining the structures forming each surface, and may be formed by bending the at least one surface.

The inner case 12 is formed on the inner surface of the outboard plate 11. The inner case 12 may be formed of a heat insulating material such as EPS (Expended Polystyrene) to insulate the inside of the cabinet 10 and prevent noise vibration. The inner case 12 is in close contact with the out plate 11 to form a shape inside the cabinet 10 and a surface contacting the panel 20 is completely opened.

The inner space of the inner case 12 is provided with the blowing fan 40 and the heat exchanger 30 may be disposed around the blowing fan 40. The heat exchanger 30 is disposed along the inner surface of the inner case 12 so as to be spaced apart from the wall surface of the inner case 12 and the blowing fan 40.

Therefore, the air sucked in the axial direction of the blowing fan (40) is discharged while being rotated in the circumferential direction of the blowing fan (40) and can be exchanged with the refrigerant while passing through the heat exchanger (30).

A condensate pump 70 may be provided at one end of the cabinet 10 and a condensate pipe 71 connected to the condensate pump 70 may extend through the cabinet 10 to the outside, The condensed water in the indoor unit 1 can be discharged to the outside.

Although not shown, the indoor unit 1, such as the blowing fan 40, the condensate pump 70, various valves, and temperature sensors, is installed in the space inside the cabinet 10 in which the condensate pump 70 is disposed. And a control box (not shown) for controlling the electric parts inside.

4 is an exploded perspective view showing a mounting structure of a condensed water pump according to an embodiment of the present invention.

As shown in the drawing, a mounting portion 13 is formed at the corner where the adjacent peripheral surfaces of the inner case 12 are in contact with each other.

The mounting portion 13 may be formed integrally with the inner case 12 when the inner case 12 is molded. If necessary, the mounting portion 13 may be formed separately on the inner side edge of the inner case 12 And may be fixedly mounted.

In detail, the mounting portion 13 protrudes from the inner edge of the inner case 12 and protrudes along both side surfaces contacting with each other. At this time, the protruding thickness of the mounting portion 13 is formed to be smaller than the width of the condensed water pump 70, and the outer surface of the condensed water pump 70, when the condensed water pump 70 is mounted, The outer surface of the cabinet 10 may protrude further than the outer surface of the cabinet 10.

That is, the mounting portion 13 includes a first side 131 protruding along one side of the inner case 12 and a second side 132 protruding along another side contacting the first side, And an inwardly recessed edge can be formed in a region where the first side surface 131 and the second side surface 132 are in contact with each other.

The mounting portion 13 protrudes inwardly from the cabinet 10 and protrudes from a side end 133 of the mounting portion 13 so that the air flowing along the side surface of the inner case 12 naturally flows along the mounting portion 13 So that it can flow.

The mounting portion 13 is disposed at a predetermined height so as to easily collect the condensed water collected in the drain pan assembly 60 by the condensed water pump 70 which is seated above the mounting portion 13, .

At this time, the height of the mounting portion 13 is lower than the height of the side surface of the inner case 12, so that the mounting portion 13 forms a stepped upper surface with the inner surface of the inner case 12 .

A mounting bracket 14 is mounted on the upper surface 134 of the mounting portion 13. The mounting bracket 14 is disposed on the upper surface of the mounting portion 13 and may be disposed at a position corresponding to the fastening position of the supporter 80 described below.

The mounting bracket 14 may be formed by bending a plate-shaped steel material, or may be formed of a plastic material having high strength. Accordingly, the mounting bracket 14 can reinforce the mounting position of the condensed water pump 70 and provide a fastening hole 141 through which the screw S can be fastened to the mounting portion.

The mounting bracket 14 may be formed to be press-fitted into a mounting portion 13 formed of a relatively soft material, and may be formed by injection-molding an insert at the time of molding the mounting portion 13.

On the other hand, the supporter 80 can be seated on the upper surface of the mounting portion 13. The supporter 80 is fixedly supported by the condensed water pump 70 to provide a surface on which the condensed water pump 70 can be stably fixed to the narrow mounting portion 13.

The supporter 80 may receive the bottom of the condensate pump 70 to support the condensate pump 70 at least in contact with the pump fixing portion 72 protruding from the lower surface of the condensate pump 70, . ≪ / RTI > The supporter 80 may be provided at its center with an opening 81 through which the air can be flown and the condensate pump 70 can be serviced.

5 is a perspective view of the supporter according to the embodiment of the present invention as viewed from above. 6 is a perspective view of the supporter as viewed from below.

The supporter 80 is formed in a plate shape and includes a first side surface 131 and a second side surface 131 which are disposed on the upper surface of the mounting portion 13, 132, respectively.

A plurality of reinforcing ribs 83 are formed on the inner and outer peripheries of the supporter 80 so as to extend upwardly and connect the inner and outer edges 82 of the supporter 80, So that the stable state of the condensate pump 70 can be maintained.

A screw hole 84 is formed on the outer side of the supporter 80 in which the screw S to be fastened to the mounting bracket 14 is mounted. The supporter 80 can be engaged with the mounting bracket 14 by the fastening of the screw S and can be stably fixed to the mounting portion 13. [

A seating part 85 is formed on the upper surface of the supporter 80 so as to protrude upward so that the fixing part 72 of the condensate pump 70 is seated. The seating portion 85 is protruded to a predetermined height so that the lower surface of the condensate pump 70 can be spaced apart from the lower surface of the supporter 80. The air passing through the opening of the supporter 80 is separated from the condensate water So that it can flow without being interfered by the lower surface of the pump (70). The condensed water pump 70 can be fixedly mounted on the supporter 80 by the engagement of the screw S which is inserted through the fixing part 72 and fastened to the mounting part 85.

A guide portion 86 is formed on the lower surface of the supporter 80. The guide portion 86 can be seated at the correct position when the supporter is mounted on the upper surface of the mounting portion 13, and a plurality of the guide portions 86 are protruded downward. The distance from one end of the supporter 80 to the guide portion 86 is set to be equal to the width of the upper surface of the mounting portion 13 so that the guide portion 86 is brought into close contact with the outer surface of the mounting portion 13 So that the mounting position of the supporter 80 can be precisely guided.

The circumferential portion 86 of the supporter 80 may be formed in a shape corresponding to the edge of the inner case 12 and a portion of the circumferential portion 86 of the supporter 80 Is brought into close contact with the edge of the inner case (12).

The other portion 87 of the supporter 80 facing the portion of the inner case 12 which is in close contact with the inner case 12 protrudes in a direction opposite to the edge of the inner case 12, Thereby providing a surface that can be fixed.

Hereinafter, the operation of the indoor unit of the air conditioner having the above structure will be described.

7 is a view showing the air flow inside the cabinet.

As shown in the figure, when the operation of the indoor unit 1 is started, the blowing fan 40 is rotated by the driving of a fan motor (not shown). The air in the indoor space is sucked to the center side of the blowing fan 40 through the suction grille 21 by the rotation of the blowing fan 40 and the sucked air is rotated in the circumferential direction of the blowing fan 40 Exchanged with the heat exchanger 30, and then discharged through the discharge port 22 into the indoor space.

The air discharged by the blowing fan 40 is discharged while being rotated and flows along the wall surface of the inner case 12 after passing through the heat exchanger 30. At this time, a part of the air flowing in contact with the projecting portion of the mounting portion 13 flows along the protruding round of the mounting portion 13 and is smoothly collided with the mounting portion 13, (13) and the inner case (12). The air directed toward the supporter 80 can flow through the opening 81 of the supporter 80 without stagnation, and noise vibration due to turbulent flow is not generated.

8 is a view showing a driving state of the condensed water pump.

As shown in the drawing, the condenser pump 70 is fixedly mounted on the upper surface of the mounting portion 13 by the supporter 80. The condensed water generated during the operation of the indoor unit 1 is collected in the drain pan assembly 60, and in particular, the condensed water pump 70 can be collected into the collecting space in which the condensed water pump 70 is located.

The condensate pump 70 is installed in the mounting portion 13 so that the suction portion 73 is located inside the water collecting space S and is driven by the floater 74 of the condensate pump 70 . The condensed water W can be sucked into the suction portion 73 by driving the condensed water pump 70 and the condensed water W sucked is discharged through the condensed water pipe 71 connected to the discharge portion 75 So that it can be discharged to the outside of the indoor unit (1).

Claims (12)

A cabinet installed on the ceiling of an indoor space;
A blowing fan provided inside the cabinet;
A heat exchanger provided inside the cabinet;
A panel having a suction port for shielding the cabinet and sucking indoor air, and a discharge port for discharging the heat-exchanged air;
A drain pan assembly provided in the cabinet for collecting condensate generated in the heat exchanger;
A condensate pump mounted in the cabinet for sucking and discharging the condensed water collected in the drain pan;
A mounting portion protruding from an inner surface of the cabinet and to which the condensate pump is mounted,
Wherein the protruding thickness of the mounting portion protrudes along the inner edge of the cabinet and is smaller than the width of the lower surface of the condensate pump.
The method according to claim 1,
In the cabinet,
An out plate forming an outer appearance of the cabinet;
And an inner case of a heat insulating material contacting the outflow rate and forming an inner shape of the cabinet.
3. The method of claim 2,
Wherein the mounting portion is formed integrally with the inner case.
3. The method of claim 2,
Wherein the mounting portion is formed of a material different from that of the inner case, and is fixedly mounted inside the inner case.
The method according to claim 1,
Wherein an upper surface of the mounting portion connects both sides of the mounting portion extending in a direction intersecting with each other, and a supporter to which the condensate pump is fixed is mounted.
6. The method of claim 5,
The upper surface of the mounting portion is formed of a metal or plastic material,
And a mounting bracket to which the screw passing through the supporter is fastened.
6. The method of claim 5,
Wherein the supporter accommodates the entire bottom surface of the condensate pump.
6. The method of claim 5,
The supporter is provided with a seating part protruding upward and separating the condensed water pump,
And an opening is formed in the supporter below the condensed water pump.
9. The method of claim 8,
A rim is protruded along the outer side of the supporter and the periphery of the opening,
Wherein a reinforcing rib is formed to connect between the outer side of the supporter and the rim of the opening.
6. The method of claim 5,
And a guide portion extending downward from a lower surface of the supporter and guiding a mounting position of the supporter in contact with a side surface of the mounting portion.
6. The method of claim 5,
Wherein at least a part of a circumference of the supporter is formed in a shape corresponding to an edge of an inner surface of the inner case and is in close contact with each other.
6. The method of claim 5,
Wherein at least one of the seating portions fixed to the condensate pump in the state where the supporter is mounted is extended to the inside of the cabinet more than an edge of the projection.
KR1020150107836A 2015-07-30 2015-07-30 Indoor unit for air conditoiner KR101742878B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
KR1020150107836A KR101742878B1 (en) 2015-07-30 2015-07-30 Indoor unit for air conditoiner
CN201610591320.8A CN106403016B (en) 2015-07-30 2016-07-25 The indoor unit of air conditioner
ES16181630T ES2746151T3 (en) 2015-07-30 2016-07-28 Indoor air conditioning unit
EP16181630.1A EP3124888B1 (en) 2015-07-30 2016-07-28 Indoor unit of air conditioner
US15/223,201 US10054320B2 (en) 2015-07-30 2016-07-29 Indoor device of air conditioner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150107836A KR101742878B1 (en) 2015-07-30 2015-07-30 Indoor unit for air conditoiner

Publications (2)

Publication Number Publication Date
KR20170014447A true KR20170014447A (en) 2017-02-08
KR101742878B1 KR101742878B1 (en) 2017-06-15

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Application Number Title Priority Date Filing Date
KR1020150107836A KR101742878B1 (en) 2015-07-30 2015-07-30 Indoor unit for air conditoiner

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KR (1) KR101742878B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200051945A (en) * 2018-11-06 2020-05-14 엘지전자 주식회사 Indoor Unit for Air Conditioner

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001059630A (en) * 1999-08-20 2001-03-06 Fujitsu General Ltd Ceiling embedded type air conditioner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200051945A (en) * 2018-11-06 2020-05-14 엘지전자 주식회사 Indoor Unit for Air Conditioner

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Publication number Publication date
KR101742878B1 (en) 2017-06-15

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