EP2192354B1 - Innenraumeinheit für eine Klimaanlage - Google Patents

Innenraumeinheit für eine Klimaanlage Download PDF

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Publication number
EP2192354B1
EP2192354B1 EP09167807A EP09167807A EP2192354B1 EP 2192354 B1 EP2192354 B1 EP 2192354B1 EP 09167807 A EP09167807 A EP 09167807A EP 09167807 A EP09167807 A EP 09167807A EP 2192354 B1 EP2192354 B1 EP 2192354B1
Authority
EP
European Patent Office
Prior art keywords
fan
indoor unit
blade
noise
conditioning apparatus
Prior art date
Legal status (The legal status 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 status listed.)
Not-in-force
Application number
EP09167807A
Other languages
English (en)
French (fr)
Other versions
EP2192354A2 (de
EP2192354A3 (de
Inventor
Jeong Taek Park
Deok Huh
Ki Won Seo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Electronics Inc
Original Assignee
LG Electronics Inc
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 LG Electronics Inc filed Critical LG Electronics Inc
Publication of EP2192354A2 publication Critical patent/EP2192354A2/de
Publication of EP2192354A3 publication Critical patent/EP2192354A3/de
Application granted granted Critical
Publication of EP2192354B1 publication Critical patent/EP2192354B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/007—Ventilation with forced flow
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • F04D29/282—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis
    • F04D29/283—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis rotors of the squirrel-cage type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/30—Vanes
    • 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
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
    • F24F1/0025—Cross-flow or tangential fans
    • 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
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0043—Indoor units, e.g. fan coil units characterised by mounting arrangements
    • F24F1/0057—Indoor units, e.g. fan coil units characterised by mounting arrangements mounted in or on a wall
    • 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
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
    • F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the heat exchangers
    • 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

Definitions

  • the present invention relates to an indoor unit for an air conditioning apparatus.
  • an air conditioning apparatus is an apparatus that cools/heats a room using a compressor, a condenser, an expander, and an evaporator.
  • the air conditioning apparatus which includes an indoor unit and an outdoor unit, may be a separated air conditioning apparatus in which an indoor unit is separated form an outdoor unit and an integrated air conditioner in which an indoor unit is integrated with an outdoor unit.
  • a fan that compulsorily flows air and a heat exchanger that performs a heat exchange with indoor air to be inhaled are received in the indoor unit.
  • a method in which air flowed from a front surface and an upper part to be discharged downwardly to the front surface is commonly applied to a conventional air conditioning apparatus.
  • a cross flow fan is commonly applied to a separated indoor unit that is installed on a wall surface.
  • an indoor unit to which such a cross flow fan is applied an indoor unit to which a high efficiency cross flow fan is applied that can reduce the burdens of electricity charges has increased demand by consumers.
  • JP 5044686 discloses a cross flow fan upon which the preamble of appending claim 1 is based.
  • a heat exchanger that has an increased heat exchange area has been applied in order to accomplish high efficiency in a limited indoor unit standard.
  • a heat exchanger in which coolant pipes are arranged in 3 rows forward and backward may also be used.
  • the heat exchange area of the heat exchanger becomes high but the system resistance is increased.
  • the noise level at the same wind volume is increased. For example, noise such as a surging noise is highly likely to be generated.
  • An object of the present invention is to provide a fan structure where the fan can be normally operated without abnormal noise although air resistance by dust accumulated on a heat exchanger or a filter is increased due to a long time use, having a reduced noise level, when a 3 row heat exchanger is applied to an indoor unit to which a cross flow fan is applied.
  • the system resistance can be reduced although the 3 row heat exchanger is applied in order to improve a heat exchange efficiency of the indoor unit.
  • the fan can be normally operated without abnormal noise.
  • the noise level can be reduced.
  • FIG. 1 is a side cross-sectional view showing a structure of an indoor unit for an air conditioning apparatus according to an embodiment of the present invention.
  • the indoor unit 10 for the air conditioning apparatus includes a chassis 11 that is closely adhered to a wall surface, a front frame 12 that is coupled to a front side of the chassis 11, a front panel 13 that is rotatably or elevatably provided on a front surface of the front frame 12, a fan 17 that is received in a space formed by the chassis 11 and the front frame 12 to inhale indoor air, and a heat exchanger 16 that surrounds the fan 17 to perform a heat exchange with indoor air to be inhaled.
  • a stabilizer 112 is provided on a front surface of the chassis 11 to allow air flow to be generated as the fan 17 rotates.
  • a heat exchanger seating part 111 that supports one end of the heat exchanger 16 is formed on an upper side of the stabilizer 112.
  • an inlet grill that inhales indoor air is formed on an upper surface of the font frame 12 and a front surface inlet port 122 that inlets indoor air is also formed on a front surface thereof.
  • a filter 15 is mounted on a front surface of the heat exchanger 16 to clean indoor air inhaled through the inlet grill 121 and the front surface inlet port 122.
  • an upper end or a lower end of the front panel 13 is rotated or is upwardly rotated to allow the front surface inlet port 122 to be opened.
  • a discharge grill 14 is provided on a lower end of the indoor unit 10, wherein the other end of the heat exchanger 16 is seated on an upper side of the discharge grill 14 and an air outlet port 141 is formed on a lower side thereof.
  • a lower end of the stabilizer 112 is extended to the air outlet port 141.
  • a discharge louver 143 that controls a leftward and rightward flow of discharged air and a discharge vane 142 that not only selectively opens/closes the air outlet port 141 but also controls an upward and downward flow of the discharged air of the discharged air are provided on the air outlet port 141.
  • the discharge vane 142 and the discharge louver 143 may be rotatably coupled to each other on a lower side of the discharge grill 14.
  • the heat exchanger 16 may have a shape where coolant pipes are arranged in 3 rows forwardly and backwardly or are divided in plural to surround a front and an upper of the fan 17.
  • the fan 17 may be a cross flow fan.
  • FIG. 2 is a front perspective view of a chassis applied to an indoor unit according to an embodiment of the present invention.
  • the heat exchanger seating part and the stabilizer 112 are formed on the front surface of the chassis 11 that is applied to the indoor unit 10 of the present invention.
  • a fan supporter 114 is formed on one side of the chassis 11 corresponding to a spot where the stabilizer 112 is formed. And, a motor seating part 113 where a motor that drives the fan 17 is seated is provided on a side of the fan supporter 114. And, a structure where a side end of the fan 17 is supported is also provided on the other side of the chassis 11. More specifically, a fan insertion groove 115 that is collapsed at a predetermined depth t for supporting the side end of the fan 17 is formed on the other side of the chassis 11.
  • the depth of the fan insertion groove 115 becomes a main design factor for reducing noise of the indoor unit.
  • the relation between the depth of the fan insertion grove 115 and noise will be explained based on experimental results, and an optimal depth of the fan insertion groove 115 will be explained.
  • FIG. 3 is a partial perspective view of a fan mounted on an indoor unit according to an embodiment of the present invention
  • FIG. 4 is a side view of the fan.
  • the fan 17 applied to the indoor unit according to the embodiment of the present invention may be a cross flow fan, and the cross flow fan has a plurality of blades 171 that are radially arranged along a circumferential direction. And, each blade is arranged slantly at a predetermined angle ⁇ . In other words, a line extended along a width s (see FIG. 5 ) direction of each blade is mounted to the blade, not being parallel to a rotation shaft of the fan 17 but being slanted by the predetermined angle ⁇ .
  • the fan forms a mean camber line by means of an inner diameter D1 from a center to an inner end of the blade 71, an outer diameter D2 from a center to an outer end of the blade 171, an inner circumferential angle ⁇ 1 and an outer circumferential angle ⁇ 2.
  • the mean camber line of the blade (hereinafter, referred to as a camber line) means a line that bisects a thickness T (see FIG. 5 ) of the blade 171.
  • the inner circumferential angle means an angle that is made by a line connecting the inner end of the camber line to the center of the fan and a contact line passing the inner end of the camber line from a circuit formed by the inner diameter D1, and hereinafter, the inner circumferential angle will be set to 90 degree.
  • the outer circumferential angle means an angle that is made by an extended straight line extended from the outer end of the camber line and a contact line passing the outer end of the camber line from a circle formed by the outer diameter D2.
  • FIG. 5 is a perspective view showing a blade of a fan corresponding to portion A of FIG. 4 .
  • the blade 171 that constitutes the fan 17 has predetermined length L and width s and is rounded as going in a length direction.
  • an inner curvature p1 of the blade 171 is set to be different from an outer curvature p2 thereof. Therefore, in the blade 171, a thickness of the edge portion is different from that of the central portion. In other words, the blade 171 has a shape that it becomes thick and then becomes thin from one end to the other end. And, the length L (Chord Length) of the blade 171 is defined based on a straight distance from the inner end of the blade to the outer end thereof.
  • the indoor unit 10 on which the fan 17 constituted as described above is mounted it is confirmed the relation between a ratio of inner diameter to outer diameter of the fan 17 and noise, the relation between an outer circumferential angle and noise, the relation between a ratio of thickness to length of a fan and noise, the relation between a ratio of an insertion depth of a side end of a fan to a length of the fan and noise, through experiments repeated several times. And, through the experiments as described above, an optimal design condition that can minimize fan noise is found.
  • FIG. 6 is a graph showing experimental results for the relation between an outer circumferential angle and noise in a fan of an indoor unit according to an embodiment of the present invention.
  • an inner circumferential angle is set to 90 degree.
  • the noise is reduced until the outer circumferential angle of the blade 171 reaches 30 degree and then is increased again as it exceeds 30 degree. In other words, it can be appreciated that the noise is minimized when the outer circumferential angle is 30 degree through the experimental results.
  • the outer circumferential angle of the blade 171 is preferably 28 degree ⁇ 2 ⁇ 32 degree, more preferably, 30 degree ⁇ 2 ⁇ 32 degree.
  • FIG. 7 is a graph showing experimental results for the relation between a ratio of inner diameter to outer diameter and noise in a fan of an indoor unit according to an embodiment of the present invention.
  • the noise is first generated at a point where the ratio of inner diameter to outer diameter D1/D2 of the blade 171 is 0.79. In other words, the noise is reduced until the ratio of inner diameter to outer diameter becomes 0.79 and then is increased again as the ratio of inner diameter to outer diameter exceeds 0.79.
  • the ratio of inner diameter to outer diameter of the blade 171 is preferably 0.77 ⁇ D1/D2 ⁇ 0.81, more preferably, 0.77 ⁇ D1/D2 ⁇ 0.8.
  • FIG. 8 is a graph showing experimental results for the relation between a ratio of thickness to length of a blade and noise in a fan of an indoor unit according to an embodiment of the present invention.
  • the noise is reduced until the ratio of thickness to length of a blade T/L reaches 0.1 and then is increased again as the ratio of thickness to length of a blade T/L exceeds 0.1.
  • the noise is minimize at a point where the ratio of thickness to length of a blade T/L is 0.1 through the experimental results.
  • the ratio of thickness to length of a fan blade is preferably 0.088 ⁇ T/L ⁇ 0.132.
  • FIG. 9 is a graph showing experimental results for the relation between a ratio of an insertion depth to length of a fan and noise in a fan of an indoor unit according to an embodiment of the present invention.
  • the noise is reduced until the ratio of an insertion depth to length of a fan t/L reaches 0.007 and then is increased again as the ratio of an insertion depth to length of a fan t/L exceeds 0.007.
  • the noise is minimized at a point where the ratio of an insertion depth to length of a fan is 0.007 through the experimental results.
  • the ratio of insertion depth to length of a fan is preferably 0.0044 ⁇ t/L ⁇ 0.0143.
  • FIG. 10 is a graph showing a result of a noise performance improvement when an indoor unit on which an optimizingly designed fan is mounted is driven.
  • the entire noise is reduced by about 2.2dB after the structure of the fan is improved compared to before the structure of the fan is improved.
  • the optimized design of the fan as described above leads to the results that the blowing performance of the fan can be increased and the system resistance and the fan noise can be reduced.
  • the results can be applied regardless of the size of the indoor unit or the size of the fan.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Air-Conditioning Room Units, And Self-Contained Units In General (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)

Claims (5)

  1. Inneneinheit für eine Klimaanlage, mit:
    einem Gehäuse mit einem Stabilisator, der einen Luftstrom erzeugt, und einer Ventilatoreinsetznut;
    einem Querstromventilator, der auf einer Vorderseite des Gehäuses entsprechend einem oberen Ende des Stabilisators zur Ansaugung von Innenraumluft angebracht ist, wobei der Querstromventilator eine Mehrzahl von Flügeln aufweist, die radial entlang einer Umfangsrichtung angeordnet sind;
    einem an der Vorderseite des Ventilators zum Wärmeaustausch mit der Innenraumluft bereitgestellten Wärmetauscher,
    wobei das Verhältnis von Dicke (T) zu Länge (L) eines Flügels 0,088 ≤ T/L ≤0,132 beträgt,
    dadurch gekennzeichnet, dass das Verhältnis von Innendurchmesser (D1) zu Außendurchmesser (D2) des Flügels 0,77 ≤ D1/D2 ≤0,81 beträgt.
  2. Inneneinheit für eine Klimaanlage nach Anspruch 1, wobei das Verhältnis von Innendurchmesser (D1) zu Außendurchmesser (D2) des Flügels 0,77≤ D1/D2 ≤0,80 beträgt.
  3. Inneneinheit für eine Klimaanlage nach Anspruch 1, wobei ein äußerer Umfangswinkel (β2) des Flügels 28° ≤ β2 ≤ 32° beträgt.
  4. Inneneinheit für eine Klimaanlage nach Anspruch 1 oder 3, wobei der äußere Umfangswinkel (β2) des Flügels 30° ≤ β2 ≤ 32° beträgt.
  5. Inneneinheit für eine Klimaanlage nach Anspruch 1, wobei das Verhältnis der Einsetztiefe (t) des Ventilators zur Länge (L) 0,0044 ≤ t/L ≤ 0,0143 beträgt.
EP09167807A 2008-11-26 2009-08-13 Innenraumeinheit für eine Klimaanlage Not-in-force EP2192354B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR20080117860A KR101485609B1 (ko) 2008-11-26 2008-11-26 공기 조화기의 실내기

Publications (3)

Publication Number Publication Date
EP2192354A2 EP2192354A2 (de) 2010-06-02
EP2192354A3 EP2192354A3 (de) 2011-03-16
EP2192354B1 true EP2192354B1 (de) 2013-01-09

Family

ID=41527851

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09167807A Not-in-force EP2192354B1 (de) 2008-11-26 2009-08-13 Innenraumeinheit für eine Klimaanlage

Country Status (5)

Country Link
US (1) US20100126206A1 (de)
EP (1) EP2192354B1 (de)
KR (1) KR101485609B1 (de)
CN (1) CN101737870B (de)
ES (1) ES2401533T3 (de)

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CN206917925U (zh) * 2017-06-30 2018-01-23 广东美的环境电器制造有限公司 贯流风轮和暖风机
CN107687671B (zh) * 2017-08-25 2023-11-14 珠海凌达压缩机有限公司 室内机和空调***
CN108443977B (zh) * 2018-03-05 2021-03-16 广东美的制冷设备有限公司 窗式空调设备
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Also Published As

Publication number Publication date
ES2401533T3 (es) 2013-04-22
KR20100059181A (ko) 2010-06-04
US20100126206A1 (en) 2010-05-27
EP2192354A2 (de) 2010-06-02
CN101737870B (zh) 2012-12-05
CN101737870A (zh) 2010-06-16
EP2192354A3 (de) 2011-03-16
KR101485609B1 (ko) 2015-01-22

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