WO2005124238A1 - 高所設置型空気調和機の天板構造 - Google Patents
高所設置型空気調和機の天板構造 Download PDFInfo
- Publication number
- WO2005124238A1 WO2005124238A1 PCT/JP2005/010961 JP2005010961W WO2005124238A1 WO 2005124238 A1 WO2005124238 A1 WO 2005124238A1 JP 2005010961 W JP2005010961 W JP 2005010961W WO 2005124238 A1 WO2005124238 A1 WO 2005124238A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- top plate
- fan
- air conditioner
- heat exchanger
- fan motor
- Prior art date
Links
Classifications
-
- 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
- F24F13/20—Casings or covers
-
- 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
- F24F1/008—Indoor units, e.g. fan coil units with perfuming or deodorising means
-
- 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
- F24F1/0047—Indoor units, e.g. fan coil units characterised by mounting arrangements mounted in the ceiling or at the ceiling
-
- 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
- F24F13/02—Ducting arrangements
- F24F13/06—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
- F24F2013/0616—Outlets that have intake openings
Definitions
- the present invention relates to a top plate structure of an air conditioner installed at a high place.
- An air conditioner (indoor unit) of a type embedded or suspended in a high place such as a ceiling is known.
- This type of air conditioner includes, for example, a metal top plate on the top surface of a cassette type main body casing.
- the air conditioner hangs heavy objects such as heat exchangers, fans and fan motors, drain pumps, switching boxes, etc., from the top plate, and then suspends the main body casing with suspension bolts, etc. It is buried inside the unit or suspended from the lower surface of the ceiling.
- FIG. 1 An example of such a high-altitude-installed type air conditioner is shown in Figs.
- the air conditioner body 1 is disposed above an opening 7 formed in the ceiling 70, and a decorative panel 2 that covers the opening 7 is attached to the air conditioner body 1.
- a substantially annular heat exchanger 4 is provided in a cassette type main body casing 3 of the air conditioner main body 1, and is disposed at the center of the heat exchanger 4, with the suction side oriented downward and the air blowing side heated.
- a fan (impeller) 5 and a fan motor 9 oriented on the inner peripheral surface of the exchanger 4 and a bell mouth 6 made of synthetic resin disposed on the suction side of the fan 5 are provided.
- the fan 5 is, for example, a centrifugal fan having a plurality of blades 5b between a hub 5a and a shroud 5c.
- a drain pan 8 is arranged below the heat exchange 4, and an air blowing passage 10 is formed on the outer periphery of the heat exchange 4.
- the cassette-type main casing 3 has, for example, a substantially hexagonal shape and includes a side wall 31 that also has a heat insulating material, and a top plate 32 that covers an upper portion of the side wall 31.
- Tube plates 11 are arranged at both open ends of the heat exchanger 4, and the tube plates 11 are connected to each other by predetermined partition plates 12.
- the top plate 32 of the main casing 3, the tube plate 11, the partition plate 12, and the switch box 13 attached to the lower surface of the bell mouth 6 are all sheet metal products. Is formed.
- a top plate 32 and a switch box 13 are fixed to the upper end and the lower end of the partition plate 12 by screws.
- the bell mouth 6 is formed with a concave portion 14 for accommodating the switch box 13.
- a switch box coupling portion 15 is formed at the lower end of the partition plate 12.
- An opening 16 is formed in the top surface 14a of the recess 14 so as to face the switch box connecting portion 15 of the partition plate 12.
- a pair of upper mounting pieces 17 as a connecting portion to the top plate 32 are integrally formed at intervals. These upper attachment pieces 17 are attached to the top plate 32 from below by screws 18.
- a pair of mounting pieces 19 as a connecting portion to the lower end of each tube sheet 11 are integrally formed at intervals.
- an intermediate mounting piece 15 as a connecting portion to the switch box 13 is fixed to an intermediate portion between the two lower mounting pieces 19 by welding.
- the lower mounting piece 19 is fixed to the tube sheet 11 from below by screws 20.
- the intermediate mounting piece 15 has an L-shaped base 15a as a connecting portion to the partition plate 12, and the base 15a is formed with a mounting portion 15b extending downward from the tip thereof.
- the intermediate mounting piece 15 is fixed to the top surface 13a of the switch box 13 from below with screws 21 with the mounting portion 15b facing the recess 14 from the opening 16.
- the drain pump 22 and the float switch 23 are arranged in a drain pump housing 24, and the drain pump housing 24 is partitioned by a partition plate 25.
- the switch box 13 is covered by a lid cover 26.
- the top plate 32 is formed in a substantially hexagonal shape corresponding to the shape of the main casing 3 of the air conditioner 1. On the outer periphery of the top plate 32, an edge 32c having a hook-like cross section for fitting the outer periphery of the upper end of the main casing 3 is formed.
- the top plate 32 has a central portion 33 for supporting the fan 5 and the fan motor 9 and an outer peripheral portion 35 for supporting the substantially annular heat exchanger 4.
- a plurality of main reinforcing ribs 32a extending radially from the portion 33 to the outer peripheral portion 35 are formed.
- the main reinforcement rib 32a is recessed below the top plate 32, and its width and depth are set to predetermined values.
- the heat exchanger support located outside the main reinforcement ribs 32a has a downward dent.
- a plurality of steps 32b having a small depth are formed.
- the main stiffness, strength, flexural characteristics, and vibration characteristics of the top plate 32 are set to required levels by the main reinforcing ribs 32a.
- the space between the main reinforcing ribs 32a is widened, and accordingly, the rigidity, strength, and the like of the top plate 32 are insufficient.
- a plurality of sub-reinforcing ribs 34 are formed adjacent to each other between the plurality of main reinforcing ribs 32a.
- the sub-reinforcing ribs 34 are formed in a desired shape and size corresponding to the assumed magnitude of the load and the like.
- the main reinforcing ribs 32a, the stepped portions 32b, and the sub-reinforcing ribs 34 reduce the static deflection of the top plate 32 to a certain value or less when designing the air conditioner, and avoid resonance due to the rotation of the fan motor 9. Therefore, the primary natural frequency of the top plate 32 was maintained at a certain value or more.
- Reinforcing ribs 33a are also formed inside the support portions of the fan 5 and the fan motor 9 located at the central portion 33 of the top plate 32.
- the reinforcing rib 33a has a substantially triangular planar shape. With the reinforcing ribs 33a, the rigidity, strength, bending characteristics, and vibration characteristics of the support portions of the fan 5 and the fan motor 9 are improved.
- Patent Document 1 JP-A-11 201496
- the entire plate thickness is made thinner than the current (for example, 0.8 mm) (for example, about 0.7 to 0.6 mm). ),Material cost It is conceivable to reduce the cost and improve the workability when forming the ribs and the like.
- a problem is a decrease in rigidity and strength of the top plate 32, and further, a measure against vibration of the top plate 32 when the fan 5 is driven.
- the thickness of the top plate 32 is made thinner than the current one, the material cost can be reduced.
- the plate can be easily deformed, and the pressure applied during press forming can be reduced, so that the workability can be improved.
- the conventional top plate 32 has a large number of reinforcing ribs, and the shape of the reinforcing ribs is complicated. Therefore, when the top plate 32 is pressed, the cost of the mold is increased, and wrinkles and cracks are formed. , Warping and the like were apt to occur, and a problem occurred!
- the present invention is a high-altitude type that can be reduced in thickness, including the behavior of the top plate at the time of driving the fan, and still obtain required rigidity, strength, and vibration characteristics.
- a main body casing accommodating a fan and a fan motor, a heat exchanger, a drain pump, and a switch box, and a top casing of the main body casing.
- An air conditioner including a fan and a fan motor, a heat exchanger, a drain pump, and a top plate on which a switch box is suspended, wherein the heat exchanger is arranged from a central portion of the top plate supported by the fan motor.
- a plurality of reinforcing ribs are formed so as to extend radially around the outer periphery of the supported top plate, and the spaces between the reinforcing ribs are formed flat.
- the top plate structure of such a high-installed air conditioner even if the plate thickness of the top plate is made thinner than before, the number and cross-sectional shape of a plurality of reinforcing ribs (drawing shape) By optimally adjusting the depth, width, etc., there is no need to form a large number of complicated reinforcing ribs as in the conventional case. In addition, the rigidity, strength, deflection characteristics, vibration characteristics, etc. of the top plate can be improved to the required levels.
- the thickness of the top plate can be reduced and the workability is improved, so that the product cost can be reduced.
- a step portion is formed in the heat exchanger supporting portion located on the outer peripheral side of the reinforcing rib.
- proper positioning for supporting heat exchange with the top plate can be achieved.
- the heat exchange is reliably supported at the positioned position, the supporting state is further stabilized.
- the vibration characteristics of the top plate are further improved.
- the strength in the width direction of the reinforcing rib is improved by the step, the bending characteristics of the top plate are further improved.
- a reinforcing rib is provided on the fan motor support located at the center of the top plate. In this case, the rigidity, strength, and vibration characteristics of the fan motor support located at the center of the top plate are also improved.
- the thickness of the top plate be 0.6 mm or more and less than 0.8 mm. In this case, the thinner the top plate, the lower the material cost and the easier it is to perform press forming.
- the strength and rigidity of the top plate are reduced, and the bending characteristics and the vibration characteristics are adversely deteriorated.
- the reinforcing rib having the above configuration is effective, such a reinforcing rib alone has a limit, and the plate thickness needs to be larger than a predetermined thickness.
- the stable support rigidity, support strength, Low noise performance can be achieved.
- FIG. 1 is a bottom view of an air conditioner according to a preferred embodiment of the present invention, showing the structure of a top plate (in a state where heat exchange is installed).
- Fig. 2 is a bottom view showing the structure of the top plate of the air conditioner (with heat exchange ⁇ installed, ⁇ ).
- FIG. 3 is a front view of a top panel.
- FIG. 4 is an enlarged sectional view taken along line 4-4 in FIG. 2.
- FIG. 5 is an enlarged cross-sectional view taken along line 5-5 in FIG. 2 showing a configuration of a reinforcing rib that is a main part of the top plate.
- FIG. 6 is a bottom view showing the structure of a conventional model manufactured under the same specification structure as the top plate of FIG. 1.
- FIG. 7 is a graph showing the relationship between the plate thickness and the method of mounting heat exchange on the maximum deflection of the top plate.
- FIG. 8 is a graph showing the relationship between the plate thickness and the method of mounting heat exchange on the resonance speed of the top plate.
- FIG. 9 is a graph showing the relationship between the maximum amount of deflection of the top plate and the depth of the auxiliary reinforcing ribs.
- FIG. 10 is a graph showing the relationship between the resonance speed of the top plate and the depth of the auxiliary reinforcing ribs.
- FIG. 11 is a graph showing a relationship between a maximum amount of deflection of a top plate and a depth of a main reinforcing rib.
- FIG. 12 is a graph showing the relationship between the resonance speed of the top plate and the depth of the main reinforcing ribs.
- FIG. 13 is a central vertical cross-sectional view showing the entire configuration of a conventional air conditioner, in which a cross section of a top plate portion corresponds to a cross section taken along line 13-13 in FIG.
- FIG. 14 is a bottom view of the air conditioner of FIG. 13 in which a decorative panel and a main body casing are removed and a downward force is viewed.
- FIG. 15 is an exploded perspective view showing a mounting relationship between a top plate portion, a bell mouth, and a switch box of the air conditioner in FIG. 13.
- FIGS. 1 to 5 show a top plate structure of an air conditioner of a high-altitude type which is used in the best embodiment of the present invention.
- the top plate 32 in this embodiment is provided with a main body casing 3 (see Fig. 3) of a ceiling-embedded air conditioner (indoor unit) substantially similar to the conventional example shown in Figs. ). [0040]
- the thickness D of the top plate 32 is formed to be about 0.7 mm thinner than the conventional 0.8 mm,
- the shape of the top plate 32 is substantially hexagonal, corresponding to the shape of the cassette-type casing 3 of the air conditioner.
- an edge portion 32c having a hook-like cross section is formed to be fitted on the outer periphery of the upper end portion of the main body casing 3.
- a central portion 33 for supporting the fan 5 and the fan motor 9 shown in FIGS. 13 to 15 and an outer peripheral portion 35 for supporting the substantially annular heat exchange 4 are formed on the top plate 32.
- a plurality of reinforcing ribs 32a extending radially from the central portion 33 to the outer peripheral portion 35 are formed. As shown in FIGS. 4 and 5, each of the reinforcing ribs 32a is obtained by recessing the top plate 32, and has a reverse trapezoidal cross section.
- Each reinforcing rib 32a has a bottom width W and an upper end width.
- the width on the first side is set to W, the depth is set to D, and the inclination angle is set to ⁇ .
- a step 32b is formed in the support of the heat exchanger 4 at the outer peripheral end of each reinforcing rib 32a. For each step 32b, the downward dent depth D is upward
- the depth D of the rib 33a is equal to the depth D of the reinforcing rib 32a. This reinforcement rib 33a
- the reinforcing ribs 33a effectively improve the rigidity and strength, bending characteristics, and vibration characteristics of the support portions of the fan 5 and the fan motor 9.
- the heavy physical force of the heat exchanger 4, the fan 5, the fan motor 9, the drain pump 22, the switch box 23, and the like is attached to the top plate 32 of the present embodiment. Affixed.
- the plurality of reinforcing ribs 32a are formed to extend radially, and the space between the reinforcing ribs 32a is formed flat.
- the top plate 32 is made thinner than before, it is possible to optimally adjust the number and cross-sectional shape (drawing shape), depth, width, and the like of the plurality of reinforcing ribs 32a. Therefore, it is not necessary to separately form a large number of auxiliary reinforcing ribs 34 and the like.
- the rigidity, strength, bending characteristics, vibration characteristics, and the like of the top plate 32 can be improved to required levels.
- the thickness of the top plate 32 can be reduced and the workability is improved, the product cost can be reduced.
- a step portion 32b is formed in the support portion of the heat exchanger 4 located on the outer peripheral side of the reinforcing rib 32a.
- step portion 32b improves the strength of the reinforcing rib 32a in the width direction, the bending characteristics of the top plate 32 are further improved.
- Reinforcing ribs 32a are also formed on the periphery of the nine support portions a to e. From this, the rigidity and strength of the support portion of the fan 5 and the fan motor 9 also in the central portion 33 of the top plate 32
- the vibration characteristics are improved.
- the thickness of the top plate 32 is preferably 0.6 mm or more and less than 0.8 mm.
- the strength and rigidity of the top plate 32 are reduced, and the bending characteristics and the vibration characteristics are deteriorated.
- the reinforcing rib 32a having the above configuration is effective, there is a limit in using only the reinforcing rib 32a, and it is necessary to make the top plate 32 thicker than a predetermined thickness.
- the appropriate top plate 32 preferably has a thickness of 0.6 mm or more and less than 0.8 mm.
- top plate 32 it is possible to realize the stable support rigidity, support strength, and low noise performance of the top plate 32 while reducing the thickness and the cost of the top plate 32 as much as possible.
- the top plate 32 is modeled by a four-node shell element, and the heat attached to the top plate 32
- Each heavy object such as the intersection 4, the fan 5, the fan motor 9, the drain pump 22, and the switch box 13 was modeled as a concentrated mass element, and the connection between the top plate 32 and the heavy object was modeled as a rigid element.
- points A to E indicate the mounting positions of the heat exchanger 4, and the supporting portions a to e indicate the mounting positions of the fan 5 and the fan motor 9.
- the drain pump 22 is fixed to the heat exchanger 4, and acts as a load on the top plate 32 via points A to E where the heat exchanger 4 is attached.
- Thickness D is 0.7mm and depth D of reinforcing rib 32a is 8.8 ⁇ 12.8mm
- the thickness D is 0.8 mm
- the depth D of the main reinforcing rib 32a is 8.8 mm
- the depth D of the sub reinforcing rib 34 is D
- the thickness D is 0.7 mm
- the depth D of the main reinforcing rib 32a is 8.8 mm
- the depth D of the sub reinforcing rib 34 is D
- the thickness D is 0.6 mm
- the depth D of the main reinforcing rib 32a is 8.8 mm
- the depth D of the sub reinforcing rib 34 is D
- each top plate 32 The dynamic analysis and the static analysis of each top plate 32 were performed in a state where the outer circumference of each top plate 32 to which the above-mentioned heavy objects were attached was completely fixed.
- SECD-DKA Electro-galvanized steel sheet based on JIS G 3313
- the maximum deflection (mm) of the top plate 32 and the resonance rotation speed (rpm) were used.
- the maximum Mises stress is not used as an evaluation item and is referred to for reference. This is because the maximum Mises stress occurs at (or near) the mounting point, which is a singular point of the stress.
- the Mises stress refers to a representative equivalent stress used to compare a value in a triaxial stress field with a uniaxial stress value (for example, a data value obtained from a material experiment).
- Tables 4 and 5 show the changes in the maximum deflection, the maximum Mises stress, and the resonance speed of the top plate 32 depending on the ratio W.
- the order shown in Table 5 means the order of the natural frequency.
- the thickness D of the top plate 32 is required to be 0.8 mm or more in order to secure the same behavior as the above-mentioned conventional top plate 32 (see Table 3).
- Heat exchanger mounting (first method) heat exchanger mounted (second method) plates maximum deflection (mm) Exhibition large MisesJ centripetal force (kgf / mm) Maximum Deflection (mm) S ⁇ CMises ⁇ ( kgf / mm 2)
- the radial ribs shown in FIG. 6 are called main reinforcing ribs 32a, and the ribs sandwiched between the main reinforcing ribs 32a are called sub reinforcing ribs.
- the effect on the behavior of Consider the effect of each rib 32a, 34. The following conditions were used for this analysis.
- the weight ratio W of the switch box 13 acting on the top plate 32 is 50.0%, and the weight of the fan 5 is the current 2.370 kgf.
- the mounting method of the fan motor 9 is the first method, and the mounting method of the heat exchanger 4 is the second method.
- the thickness D is 0.7 mm.
- the depth of the sub-reinforcing ribs 34 is set to 0.0-8
- Table 8 and Figures 9 and 10 show the analysis results when the depth was changed to 8 mm (current depth).
- the depth of the sub-reinforcing ribs 34 is 0.00 mm, that is, when the sub-reinforcing ribs 34 are eliminated and the main reinforcing ribs 32a are formed flat, the maximum deflection of the top plate 32 is minimized, and the resonance rotation It can be seen that the number is maximum.
- the top plate 32 in which the sub-reinforcement ribs 34 are eliminated and the main reinforcement ribs 32a are flattened, exhibits excellent behavior and can be easily formed, thereby reducing costs due to material reduction and product processing quality. It also leads to improvement.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air-Conditioning Room Units, And Self-Contained Units In General (AREA)
- Other Air-Conditioning Systems (AREA)
- Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05751179.2A EP1775518B1 (en) | 2004-06-17 | 2005-06-15 | Top plate structure for air conditioner installed at high place |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-179871 | 2004-06-17 | ||
JP2004179871A JP2006003011A (ja) | 2004-06-17 | 2004-06-17 | 高所設置型空気調和機の天板構造 |
Publications (1)
Publication Number | Publication Date |
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WO2005124238A1 true WO2005124238A1 (ja) | 2005-12-29 |
Family
ID=35509777
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2005/010961 WO2005124238A1 (ja) | 2004-06-17 | 2005-06-15 | 高所設置型空気調和機の天板構造 |
Country Status (4)
Country | Link |
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EP (1) | EP1775518B1 (ja) |
JP (1) | JP2006003011A (ja) |
CN (1) | CN100483034C (ja) |
WO (1) | WO2005124238A1 (ja) |
Families Citing this family (8)
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KR100867467B1 (ko) * | 2006-01-13 | 2008-11-10 | 엘지전자 주식회사 | 공기조화기의 진동방지구조 |
JP4884781B2 (ja) * | 2006-01-17 | 2012-02-29 | 三菱重工業株式会社 | 空気調和装置用キャビネット及びこれを用いた空気調和装置 |
AU2007244221B2 (en) * | 2006-04-28 | 2011-02-03 | Toshiba Carrier Corporation | Indoor unit of air conditioning system |
CN101743446B (zh) * | 2007-06-20 | 2013-08-07 | 澳大利亚奇胜有限公司 | 一种风扇和栅格窗组件 |
JP6323143B2 (ja) * | 2014-04-22 | 2018-05-16 | 新日鐵住金株式会社 | 室内機用天板 |
KR101529223B1 (ko) * | 2014-12-31 | 2015-06-16 | 엘지전자 주식회사 | 송풍기 및 그를 갖는 공기조화기 |
KR102396941B1 (ko) | 2015-08-13 | 2022-05-13 | 엘지전자 주식회사 | 공기조화기의 실내기 |
KR102201289B1 (ko) * | 2018-11-06 | 2021-01-08 | 엘지전자 주식회사 | 공기조화기의 실내기 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11201496A (ja) | 1998-01-16 | 1999-07-30 | Daikin Ind Ltd | 空気調和機 |
JP2002147789A (ja) | 2000-11-10 | 2002-05-22 | Hitachi Ltd | 空気調和機の室内機 |
-
2004
- 2004-06-17 JP JP2004179871A patent/JP2006003011A/ja active Pending
-
2005
- 2005-06-15 WO PCT/JP2005/010961 patent/WO2005124238A1/ja active Application Filing
- 2005-06-15 CN CNB2005800170393A patent/CN100483034C/zh active Active
- 2005-06-15 EP EP05751179.2A patent/EP1775518B1/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11201496A (ja) | 1998-01-16 | 1999-07-30 | Daikin Ind Ltd | 空気調和機 |
JP2002147789A (ja) | 2000-11-10 | 2002-05-22 | Hitachi Ltd | 空気調和機の室内機 |
Also Published As
Publication number | Publication date |
---|---|
CN100483034C (zh) | 2009-04-29 |
JP2006003011A (ja) | 2006-01-05 |
EP1775518B1 (en) | 2018-06-06 |
CN1957209A (zh) | 2007-05-02 |
EP1775518A1 (en) | 2007-04-18 |
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