WO2013081010A1 - Engin de chantier - Google Patents

Engin de chantier Download PDF

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Publication number
WO2013081010A1
WO2013081010A1 PCT/JP2012/080754 JP2012080754W WO2013081010A1 WO 2013081010 A1 WO2013081010 A1 WO 2013081010A1 JP 2012080754 W JP2012080754 W JP 2012080754W WO 2013081010 A1 WO2013081010 A1 WO 2013081010A1
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WO
WIPO (PCT)
Prior art keywords
fan
axial
axial fan
heat exchanger
flow
Prior art date
Application number
PCT/JP2012/080754
Other languages
English (en)
Japanese (ja)
Inventor
茂久 舩橋
岩瀬　拓
慎 松下
昌紀 江沢
知憲 儘田
渡邉　修
Original Assignee
日立建機株式会社
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 日立建機株式会社 filed Critical 日立建機株式会社
Priority to US14/361,090 priority Critical patent/US20140301839A1/en
Priority to DE112012004976.4T priority patent/DE112012004976B4/de
Publication of WO2013081010A1 publication Critical patent/WO2013081010A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D19/00—Axial-flow pumps
    • F04D19/002—Axial flow fans
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/30—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom
    • E02F3/32—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom working downwardly and towards the machine, e.g. with backhoes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K11/00—Arrangement in connection with cooling of propulsion units
    • B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
    • B60K11/04—Arrangement or mounting of radiators, radiator shutters, or radiator blinds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K11/00—Arrangement in connection with cooling of propulsion units
    • B60K11/08—Air inlets for cooling; Shutters or blinds therefor
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/0858—Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units
    • E02F9/0866—Engine compartment, e.g. heat exchangers, exhaust filters, cooling devices, silencers, mufflers, position of hydraulic pumps in the engine compartment
    • 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
    • F04D29/08—Sealings
    • F04D29/16—Sealings between pressure and suction sides
    • F04D29/161—Sealings between pressure and suction sides especially adapted for elastic fluid pumps
    • F04D29/164—Sealings between pressure and suction sides especially adapted for elastic fluid pumps of an axial flow wheel
    • 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
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38—Blades
    • F04D29/384—Blades characterised by form
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/541—Specially adapted for elastic fluid pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/40—Special vehicles
    • B60Y2200/41—Construction vehicles, e.g. graders, excavators
    • B60Y2200/412—Excavators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2306/00—Other features of vehicle sub-units
    • B60Y2306/09—Reducing noise

Definitions

  • the present invention relates to a construction machine including a cooling device that supplies cooling air to a heat exchanger such as a radiator by an axial fan.
  • a hydraulic pump is driven by a diesel engine, and excavation work or traveling is performed using the hydraulic energy. Therefore, in the engine room, together with the engine and the hydraulic pump, a radiator for cooling the engine, a heat exchanger such as an oil cooler for cooling the hydraulic oil, and cooling air for supplying these heat exchangers A cooling fan is arranged.
  • Patent Document 1 is known as background art in this technical field.
  • This Patent Document 1 discloses an example of cooling a heat exchanger for a construction machine using a low-cost and thin axial flow fan.
  • the axial flow fan is connected to an engine crankshaft. It is configured to rotate by power transmitted through a pulley and a fan belt.
  • the heat exchanger is located upstream of the axial flow fan, and the air flowing in from the outside through the intake port passes through the heat exchanger and is then guided to the axial flow fan by a fan shroud and fan ring. Is done.
  • the air pressurized by the axial fan flows around the engine (structure) and is discharged to the outside through the exhaust port.
  • construction machinery In recent years, in order to comply with exhaust gas regulations for diesel engines mounted on construction machinery, construction machinery also uses air-cooled intercoolers and water-cooled EGR (Exhaust Gas Recirculation) equipment as a means to reduce exhaust gases. Installation is carried out. In addition, suppression of exhaust gas has been promoted by installing a common rail and controlling fuel injection timing.
  • EGR exhaust Gas Recirculation
  • heat exchangers have been increased in size as the cooling load increases.
  • the number of devices mounted in the limited space in the engine compartment has increased, so there is a limit to that. .
  • the size of the heat exchanger is increased in the direction of increasing the thickness of the heat exchanger.
  • the space in the direction of the rotation axis of the fan is narrowed accordingly. Accordingly, when the distance between the heat exchanger and the fan is reduced, the wind speed distribution of the air passing through the heat exchanger is deteriorated. If the distance between the fan and the engine is reduced, the flow out of the fan is likely to collide with the engine, thereby increasing the pressure loss in the cooling air flow path. Therefore, the number of fan rotations required to obtain the necessary air volume increases, and as a result, the fan shaft power and noise increase, leading to an increase in construction machine noise and fuel consumption.
  • the present invention has been made in view of the above-described circumstances, and its purpose is to achieve a high efficiency and low efficiency in which the air velocity distribution of the heat exchanger is good and the collision of the air flowing out of the axial fan with the engine can be avoided. It is to provide noise construction machinery.
  • the present invention has an axial fan having a plurality of blade pieces and rotating around an axis, and is disposed around the axial fan.
  • a fan ring for guiding, a heat exchanger disposed upstream or downstream of the air flow from the axial fan, and a structure disposed downstream of the air fan from the axial fan.
  • the fan ring has a suction side R-shaped portion that reduces the flow path on the suction side and a discharge-side R-shaped portion that expands the flow path on the discharge side, and the blade piece has a leading edge And a rear edge and an outer peripheral edge.
  • the axial fan is attached in a posture inclined at a forward angle ⁇ from the axial center toward the rotational direction and forwardly inclined toward the suction side.
  • the suction side of the axial flow fan can be a centripetal flow and the discharge side can be a centrifugal flow, so that the air flow is more upstream than the axial flow fan.
  • a large heat exchanger arranged on the side or the downstream side it becomes possible to flow cooling air with a good wind speed distribution to the end portion.
  • the thermal radiation performance in a heat exchanger can be improved and the hot air around an engine can be ventilated efficiently, generation
  • the advance angle ⁇ is preferably in the range of 5 ° to 25 °.
  • the second intersection point where the front edge and the outer peripheral edge of the blade piece intersect is at a position protruding from the suction side R-shaped portion to the upstream side of the air flow. If comprised in this way, since the centripetal flow on the suction side and the centrifugal flow on the discharge side of the axial flow fan become smoother, the heat dissipation performance of the heat exchanger is further improved.
  • FIG. 1 is an external perspective view of a hydraulic excavator according to a first embodiment of the present invention. It is a sectional side view of the engine room of the hydraulic excavator shown in FIG. It is the side view to which the principal part of the axial fan shown in FIG. 2 and a fan ring was expanded. It is the top view to which the principal part of the axial fan shown in FIG. 2 was expanded. It is a figure which shows the relationship between the advancing angle of the blade
  • the hydraulic excavator which is an embodiment of a construction machine according to the present invention will be described with reference to the drawings.
  • the hydraulic excavator according to the first embodiment is attached to a crawler 24, an upper swing body 26 disposed on the crawler 24, and the upper swing body 26 so as to be rotatable in the vertical direction.
  • the front working machine capable of performing excavation work and the like, and the cab 25 as an operation room are provided.
  • the front work machine includes a boom 21 that is attached to the upper swing body 26 so as to be able to move up and down, an arm 22 that is rotatably attached to the tip of the boom 21, and a bucket 23 that is rotatably attached to the tip of the arm 22.
  • the upper swing body 26 has the engine room 10 built in behind it.
  • Reference numeral 27 denotes a counter weight 27.
  • the engine room 10 includes an axial fan 2, a fan ring 3 that guides the air flow to the axial fan 2, a heat exchanger 1, an engine (structure) 4, A battery 9 is installed.
  • an intake port 7 serving as an air inlet / outlet is provided in the upper portion of the engine chamber 10, and an exhaust port 8 is provided in the upper and lower portions of the engine chamber 10.
  • the positional relationship among the heat exchanger 1, the axial fan 2 and the engine 4 is such that the heat exchanger 1 is upstream of the air flow from the axial fan 2 and the engine 4 is downstream of the air flow of the axial fan 2. is there.
  • the axial fan 2 is required to have a centripetal flow toward the center of the fan on the upstream side, and a centrifugal flow toward the centrifugal direction of the fan on the downstream side. Therefore, in this embodiment, forward / forward tilting blades are employed (details will be described later).
  • the heat exchanger 1 includes a radiator, an oil cooler, and an intercooler, and each device is arranged in parallel.
  • the size of the heat exchanger 1 has been increasing in order to increase the amount of heat exchanged, and in this embodiment as well, the overall outer shape of the heat exchanger 1 is relatively larger than the axial fan 2. Yes.
  • the engine 4 includes a crankshaft (output shaft) 4a, from which power for rotating the axial fan 2 is transmitted via the pulley 5 and the fan belt 6. Then, the fan 5 is adjusted to an appropriate fan rotation speed by the pulley 5, and the fan 2 rotates.
  • the axial fan 2 includes a cylindrical hub 2b attached to the rotary shaft 2c, and a plurality of blades (blade pieces) 2a provided around the hub 2b. .
  • the fan ring 3 is formed in an annular shape, and is provided around the axial flow fan 2 as shown in FIGS. 2 and 3, and has a suction side R-shaped portion 3a having a curved surface on the suction side. It has a discharge side R-shaped portion 3b having a curved surface on the discharge side. That is, in the fan ring 3, the side edge on the suction side and the side edge on the discharge side are both formed in an R shape.
  • the blade 2 a is formed to have a front edge 2 g, an outer peripheral edge 2 e, and a rear edge 2 d, and the axial fan 2 is attached inside the fan ring 3.
  • the second intersection point Q where the front edge 2g and the outer peripheral edge 2e intersect is projected by a length L from the suction side R-shaped part 3a of the fan ring 3 to the upstream side (suction side), and the rear edge 2d and the outer peripheral edge 2e
  • the first intersection point P where the two intersect with each other is positioned within the range of the width W of the discharge-side R-shaped portion 3 b of the fan ring 3.
  • the blade 2a protrudes toward the suction side as the position has a larger diameter, and is inclined (forwardly inclined) as a whole. Further, as shown in FIG. 4, the blade 2 a protrudes in the rotational direction (moves forward) at a location having a larger radial position, and its advance angle is ⁇ . That is, the blade 2a of the axial fan 2 used in this embodiment is a forward / forward tilting blade. Note that the advancing angle ⁇ here indicates how much the trailing edge 2d of the blade 2a protrudes in the rotation direction, and specifically, the center point A of the rotating shaft 2c and the blade 2a. This is an inner angle A of the triangle AOP formed by connecting the third intersection point O where the rear edge 2d and the hub 2b intersect with the first intersection point P.
  • FIGS. 2 and 3 indicate the flow of air.
  • an axial fan with forward and forward inclined blades creates a centripetal flow that goes toward the rotation center of the fan on the upstream side (suction side), and partly sucks air from the side of the fan. have. Therefore, when the axial flow fan 2 rotates, a pressure difference is generated between before and after that, and an air flow is induced.
  • low-temperature air outside the engine compartment 10 flows into the engine compartment 10 through the intake port 7.
  • the air passes through the heat exchanger 1, it takes heat of the fluid (engine cooling water, hydraulic oil, compressed air, etc.) in the pipe of the heat exchanger 1 and becomes high temperature.
  • the refrigerant flows into the axial fan 2, is pressurized, flows out from the axial fan 2, flows around the engine 4, and is discharged from the exhaust port 8 to the outside of the engine room 10.
  • the axial fan having forward and forward inclined blades is characterized in that air tends to flow out in the axial direction along the rotary shaft 2c on the downstream side (discharge side). Therefore, if it is as it is, the air which flowed out from the axial fan 2 may collide with the engine 4, and pressure loss may increase.
  • the first intersection point P where the trailing edge 2d and the outer peripheral edge 2e intersect is positioned within the range of the width W of the discharge side R-shaped portion 3b of the fan ring 3. I try to let them.
  • the air which flowed out from the axial fan 2 flows along the discharge side R-shaped part 3b of the fan ring 3 by the Coanda effect, the air flow is easily directed in the radial direction, and the centrifugal flow It becomes.
  • the air flowing out from the axial fan 2 can be prevented from colliding with the engine 4 and the increase in pressure loss can be suppressed.
  • discharge side R-shaped portion 3b of the fan ring 3 also acts as a diffuser, it effectively decelerates the flow having a high absolute flow velocity flowing out from the first intersection P at the rear end of the blade 2a, and increases the static pressure. We can expect effect to make.
  • the heat exchanger 1 can achieve effective heat exchange with a good wind speed distribution, and the downstream side of the axial flow fan 2 is outflowed. By avoiding a collision with the engine 4 due to the air, a flow path configuration with a low pressure loss can be realized.
  • the advance angle ⁇ is too large, the centripetal flow on the suction side of the axial fan 2 and further the axial flow on the discharge side become strong, and even if it has the above-described configuration, the centrifugal flow on the downstream side is increased. It becomes difficult to realize. Further, the value of the fan noise varies depending on the value of the advance angle ⁇ , and the air volume is also affected. Therefore, the inventors conducted the following simulation analysis in order to obtain a preferable angle range of the advance angle ⁇ .
  • the construction machine is in an operating environment in which dust and dirt accumulate on the heat exchanger due to the operating environment, and the flow resistance gradually increases as an axial fan.
  • the heat exchanger and filter are cleaned to remove clogging, and the increase in flow resistance is suppressed.
  • the advance angle ⁇ is about 5 ° or more and about 40 ° or less.
  • the advance angle ⁇ as a threshold value satisfying both design requirements is 5 ° or more and 25 ° or less. Therefore, in the axial fan 2 according to the present embodiment, the advancing angle ⁇ of the blade 2a is set to 5 ° to 25 °.
  • FIG. 7 is a side sectional view of the engine chamber of the hydraulic excavator according to the second embodiment.
  • symbol is attached
  • the axial fan 2 is provided separately from the engine 4, the heat exchanger 1 is disposed on the downstream side of the axial fan 2, and the intake port 7 is the engine on the upstream side of the axial fan 2.
  • the upper and lower wall surfaces of the chamber 10 are disposed on the side surfaces as viewed from the rotating shaft 2 c of the axial fan 2.
  • the axial fan 2 is directly connected to the hydraulic motor 11 and is driven thereby.
  • a fan ring 3 is installed around the axial fan 2 as in the first embodiment.
  • the centripetal flow on the upstream side of the axial fan 2 and the centrifugal flow on the downstream side are compatible. For this reason, air flows in smoothly from the air inlet 7 provided on the side as viewed from the rotating shaft 2c.
  • the present invention is not necessarily limited thereto.
  • the fan driving method and the type of heat exchanger to be used are not limited, and the effect can be expected in construction machines other than hydraulic excavators.
  • Heat exchanger 2 Axial fan 2a Wing (blade piece) 2c Rotating shaft (axis) 2d Rear edge 2e Outer peripheral edge 2g Front edge 3 Fan ring 3a Suction side R-shaped part 3b Discharge side R-shaped part 4 Engine (structure) P First intersection point Q Second intersection point W Width of discharge-side R-shaped portion ⁇ Advance angle

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention porte sur un engin de chantier à haut rendement et silencieux, dans lequel un échangeur de chaleur possède une distribution satisfaisante de la vitesse de vent et où l'impact de l'air qui sort d'un ventilateur à flux axial monté sur un moteur peut être évité. Dans un engin de construction comprenant un ventilateur à flux axial (2) ayant une pluralité de pales de rotor (2a), un anneau de ventilateur (3) servant à guider le flux d'air vers le ventilateur à flux axial, un échangeur de chaleur (1) disposé en amont ou en aval dans le flux d'air issu du ventilateur à flux axial, et un corps structurel (4) disposé en aval dans le flux d'air issu du ventilateur à flux axial, l'anneau de ventilateur présente une partie en forme de R côté entrée (3a) servant à rétrécir un canal d'écoulement côté entrée et une partie en forme de R côté refoulement (3b) servant à élargir un canal d'écoulement côté refoulement, les pales de rotor sont inclinées selon un angle d'avance ט dans le sens de la rotation en partant du centre axial et sont fixées de manière à être inclinées vers l'avant vers le côté d'entrée et, lorsque le ventilateur à flux axial est fixé au côté intérieur de l'anneau de ventilateur, des premiers points d'intersection (P) où les bords arrière et les bords périphériques extérieurs des pales de rotor se rejoignent sont positionnés dans une zone de la largeur de la partie en forme de R côté refoulement.
PCT/JP2012/080754 2011-11-29 2012-11-28 Engin de chantier WO2013081010A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US14/361,090 US20140301839A1 (en) 2011-11-29 2012-11-28 Construction machine
DE112012004976.4T DE112012004976B4 (de) 2011-11-29 2012-11-28 Baumaschine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-260760 2011-11-29
JP2011260760A JP5883278B2 (ja) 2011-11-29 2011-11-29 建設機械

Publications (1)

Publication Number Publication Date
WO2013081010A1 true WO2013081010A1 (fr) 2013-06-06

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ID=48535461

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2012/080754 WO2013081010A1 (fr) 2011-11-29 2012-11-28 Engin de chantier

Country Status (4)

Country Link
US (1) US20140301839A1 (fr)
JP (1) JP5883278B2 (fr)
DE (1) DE112012004976B4 (fr)
WO (1) WO2013081010A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107923141B (zh) * 2016-03-10 2020-06-12 日立建机株式会社 工程机械
US10563751B2 (en) 2017-04-19 2020-02-18 Excel Industries, Inc. Cooling apparatus for continuously variable transmissions

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0988889A (ja) * 1995-09-19 1997-03-31 Matsushita Refrig Co Ltd 冷却装置
JP2001227497A (ja) * 2000-02-16 2001-08-24 Daikin Ind Ltd プロペラファン及び該ファンを備えた空気調和機
JP2007040116A (ja) * 2005-08-01 2007-02-15 Daikin Ind Ltd 軸流ファン
JP2010236372A (ja) * 2009-03-30 2010-10-21 Daikin Ind Ltd 軸流送風機、空気調和機及び換気扇
JP2010270670A (ja) * 2009-05-21 2010-12-02 Hitachi Constr Mach Co Ltd 建設機械の冷却ファン装置
JP2011185236A (ja) * 2010-03-11 2011-09-22 Mitsubishi Electric Corp 送風機及びヒートポンプ装置

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Publication number Priority date Publication date Assignee Title
US5513951A (en) * 1993-03-29 1996-05-07 Nippondenso Co., Ltd. Blower device
JP3023433B2 (ja) * 1995-04-10 2000-03-21 日立建機株式会社 熱交換器の冷却装置
US6390770B1 (en) * 1998-06-17 2002-05-21 Hitachi Construction Machinery Co., Ltd. Fan device and shroud
JP3919496B2 (ja) * 2001-10-15 2007-05-23 ヤンマー株式会社 ラジエータファンおよびこれを用いたエンジン冷却装置
DE102010038950A1 (de) 2010-08-05 2012-02-09 Behr Gmbh & Co. Kg Axiallüfter

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0988889A (ja) * 1995-09-19 1997-03-31 Matsushita Refrig Co Ltd 冷却装置
JP2001227497A (ja) * 2000-02-16 2001-08-24 Daikin Ind Ltd プロペラファン及び該ファンを備えた空気調和機
JP2007040116A (ja) * 2005-08-01 2007-02-15 Daikin Ind Ltd 軸流ファン
JP2010236372A (ja) * 2009-03-30 2010-10-21 Daikin Ind Ltd 軸流送風機、空気調和機及び換気扇
JP2010270670A (ja) * 2009-05-21 2010-12-02 Hitachi Constr Mach Co Ltd 建設機械の冷却ファン装置
JP2011185236A (ja) * 2010-03-11 2011-09-22 Mitsubishi Electric Corp 送風機及びヒートポンプ装置

Also Published As

Publication number Publication date
DE112012004976B4 (de) 2022-03-31
DE112012004976T5 (de) 2014-09-11
US20140301839A1 (en) 2014-10-09
JP5883278B2 (ja) 2016-03-09
JP2013113225A (ja) 2013-06-10

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