JP2019112029A - Heat exchange device - Google Patents

Abstract

To reduce the external dimensions of a heat exchange device in a flow direction of cooling air while maintaining a cooling performance of a fluid.SOLUTION: A fan bracket 20 for mounting a fan motor 19 for rotating and driving a cooling fan 18 in a heat exchanger mounting frame 13 is configured so that both side portions across a cooling air flow opening 16A of a fan shroud 16 are mounted on the heat exchanger mounting frame 13. Then, an upper side fan guard 21 and a lower side fan guard 22 are provided to cover the cooling fan 18 while flowing the cooling air in the remaining portions (range A and range B) of the cooling air flow opening 16A of the fan shroud 16 which is detached from the fan bracket 20 and opened.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a heat exchange apparatus suitably used to cool a fluid such as, for example, hydraulic oil.

  In general, construction machines such as hydraulic shovels are capable of self-propelled lower traveling bodies, upper revolving bodies mounted on the lower traveling bodies so as to be capable of turning, and lifting motions in front of the upper revolving bodies. And a front device provided in the vehicle.

  The upper swing body includes a swing frame, a cab provided on the swing frame and forming a cab, a counterweight provided on the rear end side of the swing frame, and a building cover provided on the front side of the counterweight. In the building cover, an engine, a hydraulic pump, a heat exchange device, and the like are accommodated.

  Then, the heat exchange apparatus comprises a heat exchanger for cooling a fluid containing heated hydraulic oil and engine cooling water using cooling air, a heat exchanger mounting frame to which the heat exchanger is mounted, and a heat exchanger mounting frame A fan shroud mounted on one side of the flow direction of the cooling air and having a cooling air flow opening, a cooling fan disposed in the fan shroud for sending the cooling air to the heat exchanger, and a cooling fan And a fan bracket for mounting the fan motor to the heat exchanger mounting frame. Moreover, the heat exchange apparatus is provided with the fan guard which covers a cooling fan, distribute | circulating a cooling air (refer patent document 1).

JP, 2008-190513, A

  Here, in recent construction machines, the amount of heat generated by the engine has been increased along with the tightening of exhaust gas regulations, and the heat exchanger has also been enlarged in order to cope with this. On the other hand, since the upper revolving superstructure has a space for mounting various devices due to a size restriction and the like when transporting a general road, downsizing of the heat exchange device is desired.

  However, in the heat exchange device according to Patent Document 1, the fan bracket is attached to the heat exchanger mounting frame, the fan shroud is disposed so as to overlap the fan bracket in the flow direction of the cooling air, and further overlaps the fan shroud There is a fan guard on the For this reason, there exists a problem that the outside dimension of a heat exchange apparatus will become large by the flow direction of cooling air.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a heat exchange device capable of reducing the external dimension in the flow direction of the cooling air while maintaining the cooling performance of the fluid. It is to do.

  In the present invention, a heat exchanger for cooling a heated fluid using cooling air, a heat exchanger mounting frame to which the heat exchanger is mounted, and a flow direction of the cooling air with respect to the heat exchanger mounting frame A fan shroud mounted on one side and having a cooling air flow opening, a cooling fan disposed in the fan shroud for sending the cooling air to the heat exchanger, and a fan motor for rotating the cooling fan And a fan bracket for mounting the fan motor to the heat exchanger mounting frame, wherein the fan bracket has both side portions of the fan shroud across the cooling air flow opening. Of the cooling air flow opening of the fan shroud attached to the heat exchanger mounting frame and opening away from the fan bracket The surplus of the aperture, a fan guard that covers the cooling fan while circulating the cooling air is provided.

  According to the present invention, the outer dimensions can be reduced in the flow direction of the cooling air while maintaining the cooling performance of the fluid.

1 is a front view showing a hydraulic shovel according to an embodiment of the present invention. It is a top view showing a hydraulic shovel which omitted a part of building covers and exposed an engine, a hydraulic pump, and a heat exchange device. It is the perspective view which looked at the heat exchange apparatus by embodiment of this invention from the downstream side of the flow direction of cooling air. It is the front view which looked at the heat exchange apparatus from the downstream of the flow direction of a cooling air. It is sectional drawing which looked at the heat exchange apparatus from the arrow V V direction in FIG. FIG. 5 is an exploded perspective view showing an assembly of a heat exchanger, an exchanger mounting frame and a fan shroud and a cooling fan, a fan motor, a fan bracket, a fan guard, and a fan control valve assembly. FIG. 7 is an enlarged perspective view showing an assembly of the heat exchanger, the exchanger mounting frame and the fan shroud in FIG. 6; FIG. 7 is an enlarged perspective view showing an assembly of a cooling fan, a fan motor, a fan bracket, a fan guard and a fan control valve in FIG. 6;

  Hereinafter, the case where the heat exchange device according to the embodiment of the present invention is applied to a hydraulic shovel is taken as an example, and will be described in detail with reference to FIGS. 1 to 8.

  In FIG. 1, a hydraulic shovel 1 constitutes a construction machine, and includes a heat exchange device 11 described later. The hydraulic shovel 1 can move up and down on the front side of the upper turning body 3 and a crawler type lower traveling body 2 capable of self-propelled movement, an upper turning body 3 provided to be able to turn on the lower running body 2. And a front device 4 provided in the vehicle.

  The upper swing body 3 has a swing frame 5 as a base, a cab 6 provided on the front left side of the swing frame 5 to form a cab, and a weight balance of the front device 4 on the rear side of the swing frame 5 A counterweight 7 is provided, and a building cover 8 provided between the cab 6 and the counterweight 7 and covering an engine 9 and the like described later.

  Here, as shown in FIG. 2, the swing frame 5 is provided at a central portion in the left and right directions and is erected at intervals in the left and right directions on the bottom plate 5A extending forward and backward. Left and right side frames 5D and 5E extending forward and backward at left and right away from the left and right longitudinal plates 5B and 5C and the respective vertical plates 5B and 5C. And consists of.

  The building cover 8 is provided on the swing frame 5 so as to be located between the cab 6 and the counterweight 7. The building cover 8 accommodates an engine 9 and a heat exchange device 11 which will be described later.

  The engine 9 is mounted in the building cover 8 and mounted on the turning frame 5. The engine 9 is mounted at the rear position of the turning frame 5 in a laterally-mounted state extending in the left and right directions. Here, a heat exchange device 11 described later is disposed on the right side of the engine 9, and a hydraulic pump 10 is attached to the left side of the engine 9. The hydraulic pump 10 is driven by the engine 9 to operate on various hydraulic actuators such as a hydraulic motor for traveling, a hydraulic motor for turning (not shown) and hydraulic cylinders provided in the front device 4. It supplies oil (pressure oil).

  Next, the configuration of the heat exchange device 11 forming the characterizing portion of the present embodiment will be described in detail with reference to FIGS.

  As shown in FIG. 2, the heat exchange device 11 is provided on the swing frame 5 at the right side of the engine 9. The heat exchange device 11 cools engine cooling water as a fluid, hydraulic oil, and intake air of the engine 9. As shown in FIGS. 3 to 8, the heat exchanger 11 includes a heat exchanger 12, a heat exchanger mounting frame 13, a fan shroud 16, a cooling fan 18, a fan motor 19, a fan bracket 20, fan guards 21, 22, The bracket side fan guards 23, 24, the fan control valve 25, and the hydraulic lines 26, 27 are provided. Further, in the present embodiment, the fan bracket 20 is disposed at an intermediate position above and below the cooling air flow opening 16A of the fan shroud 16.

  The heat exchanger 12 cools the heated fluid using a cooling air, and is accommodated in the heat exchanger mounting frame 13. The heat exchanger 12 is composed of a radiator 12A, an oil cooler 12B and an intercooler 12C.

  As shown to FIG. 4, FIG. 7 etc., the radiator 12A of the heat exchanger 12 is accommodated in the heat exchanger mounting frame 13 (accommodating space 14). The radiator 12A cools the engine cooling water by radiating the heat of the engine cooling water flowing through the inside into the cooling air when the cooling air generated by the cooling fan 18 described later passes. The radiator 12A extends in the front and back directions so as to be orthogonal to the flow direction (left and right directions) of the cooling air. In addition, one or more radiators 12A (see FIG. 4 in the present embodiment) flow of cooling air according to the size of the engine 9 to be cooled (the size of the generated heat). It is arranged in parallel to the direction. The upper portion and the lower portion of each of the radiators 12A are attached to the heat exchanger mounting frame 13 via a vibration isolation member 15 described later.

  The oil cooler 12B of the heat exchanger 12 is housed in the heat exchanger mounting frame 13 together with each radiator 12A. The oil cooler 12 B cools the hydraulic oil by radiating the heat of the hydraulic oil (return oil) returned from each hydraulic actuator flowing through the inside into the cooling air when the cooling air passes. is there. The oil cooler 12B is disposed at the rear position of the radiator 12A so as to be parallel to the flow direction of the cooling air. The oil cooler 12B is attached to the heat exchanger attachment frame 13 using a bolt (not shown).

  As shown in FIG. 5, the intercooler 12C of the heat exchanger 12 is housed in the heat exchanger mounting frame 13 together with the respective radiators 12A and the oil cooler 12B. The intercooler 12C cools the intake air by radiating the heat of the intake air supplied from the supercharger of the engine 9 into the cooling air when the cooling air passes. The intercoolers 12C are arranged in series (overlap) in the flow direction of the cooling air with respect to the radiators 12A and the oil coolers 12B. That is, the intercooler 12C is disposed on the right side (upstream side in the flow direction of the cooling air) of each of the radiators 12A and the oil cooler 12B, and attached to the heat exchanger mounting frame 13 using bolts (not shown).

  The heat exchanger mounting frame 13 is one to which the heat exchanger 12 (radiator 12A, oil cooler 12B and intercooler 12C) is mounted. The heat exchanger mounting frame 13 is formed as, for example, a frame structure (a rectangular frame) surrounded by the front plate 13A, the rear plate 13B, the upper plate 13C and the lower plate 13D. Thus, the inside of the heat exchanger mounting frame 13 is a housing space 14 for housing the heat exchanger 12. The heat exchanger mounting frame 13 is integrally attached to the turning frame 5 using a bolt or the like. Further, upper and lower portions of the radiator 12A are attached to the upper surface plate 13C and the lower surface plate 13D, respectively, via the vibration isolation members 15 (see FIG. 5). Further, an oil cooler 12B and an intercooler 12C are attached to the heat exchanger mounting frame 13 by bolts (not shown).

  The heat exchanger mounting frame 13 can omit the lower surface plate 13D by using a part of the turning frame 5, for example. Further, the front plate 13A can be omitted by using a partition plate (not shown) that divides the front side of the engine 9. The heat exchanger mounting frame 13 guides the cooling air so that the cooling air is efficiently supplied to the radiator 12A, the oil cooler 12B and the intercooler 12C of the heat exchanger 12, while the radiator 12A, the oil cooler 12B and the intercooler 12C are The shape is not limited to that described above as long as it can be supported.

  The fan shroud 16 is provided downstream of the heat exchanger mounting frame 13 in the flow direction of the cooling air, that is, on the left side of the heat exchanger mounting frame 13. The peripheral portion of the fan shroud 16 is attached to the left end of the heat exchanger mounting frame 13, whereby the fan shroud 16 doubles as a part of the left face plate covering the left side of the heat exchanger mounting frame 13. There is. At a central position of the fan shroud 16, a circular cooling air circulation opening 16A is provided. As shown in FIG. 5, the periphery of the cooling air flow opening 16A is a short cylindrical open cylindrical portion 16B which is bent and protrudes leftward.

  A plurality of bracket mounting seats 16C and 16D are provided on the fan shroud 16 in a plane portion forming the left face plate of the heat exchanger mounting frame 13 at positions separated forward and backward across the cooling air flow opening 16A. It is done. Each bracket mounting seat 16C, 16D has a screw hole into which a bolt 17 for fixing frame members 20A, 20B of the fan bracket 20 described later is screwed. Further, a plurality of, for example, four guard mounting seats 16E are provided on the upper portion and the lower portion of the fan shroud 16 at an interval in the width direction (forward and backward directions). Each guard mounting seat 16E has a screw hole into which a bolt 17 for fixing each fan guard 21, 22 described later is screwed.

  Here, the cooling air flow opening 16 A (opening cylindrical portion 16 B) of the fan shroud 16 is formed to have a diameter slightly larger than the diameter of the cooling fan 18. Thereby, when the cooling fan 18 rotates, the air of the accommodation space 14 formed in the heat exchanger mounting frame 13 can be efficiently sucked through the cooling air flow opening 16A.

  The cooling fan 18 is disposed in the fan shroud 16. The cooling fan 18 is configured as a suction fan that sucks in air (atmosphere) outside the building cover 8 and supplies it to the heat exchanger 12 (radiator 12A, oil cooler 12B, intercooler 12C). That is, the flow direction of the cooling air when the cooling fan 18 is rotated is the left and right directions of the upper structure 3, the upstream side is the right side, and the downstream side is the left side. As shown in FIG. 5, the cooling fan 18 comprises a hub 18A located at the center and attached to the rotation shaft 19B of the fan motor 19, and a plurality of, for example, seven blades 18B radially extending from the hub 18A. It is done. The number of blades 18B can be appropriately set in addition to seven.

  The cooling fan 18 faces each radiator 12A of the heat exchanger 12 and the oil cooler 12B from the left side. In this case, as shown in FIG. 5, the cooling fan 18 is disposed such that the blades 18B are accommodated in the cooling air flow opening 16A. In this case, each blade 18B of the cooling fan 18 may be disposed so as to slightly protrude from the cooling air flow opening 16A.

  The fan motor 19 rotationally drives the cooling fan 18. The fan motor 19 is formed as a hydraulic motor whose power source is hydraulic oil (pressure oil). The fan motor 19 is formed of a motor main body 19A that generates a rotational force by the supplied pressure oil, and a rotary shaft 19B that protrudes from the motor main body 19A and outputs the rotational force. The motor main body 19A is provided between the frame members 20A and 20B of the fan bracket 20 described later. Thus, the motor main body 19A is attached to the heat exchanger mounting frame 13 via the fan bracket 20. Further, the motor main body 19A is connected to the fan control valve 25 via hydraulic lines 26 and 27 described later.

  The fan bracket 20 is for attaching the fan motor 19 to the heat exchanger mounting frame 13. Both ends of the fan bracket 20 are attached between the front plate 13A and the rear plate 13B of the heat exchanger mounting frame 13 and at an intermediate portion between the upper plate 13C and the lower plate 13D. That is, the fan bracket 20 is disposed at the upper and lower intermediate position of the cooling air flow opening 16 A of the fan shroud 16. The fan brackets 20 are a pair of frame members 20A and 20B which are spaced apart from each other in the upper and lower directions and extend in the lateral direction of the heat exchanger mounting frame 13 and the upper and lower extended ends. Are mounted on each of the frame members 20A and 20B, and a plurality of, for example, four connecting members 20C to 20F are arranged in the longitudinal direction of each of the frame members 20A and 20B in a ladder shape.

  Each of the frame members 20A and 20B has a plurality of bolt insertion holes on both sides of the cooling air flow opening 16A of the fan shroud 16, that is, on both tip ends located radially outward of the cooling air flow opening 16A. 20A1 and 20B1 are provided. The bolt insertion holes 20A1 and 20B1 correspond to the screw holes of the bracket mounting seats 16C and 16C of the fan shroud 16, respectively.

  In each frame member 20A, 20B, screw holes (not shown) are respectively provided at a plurality of places, for example, four places at upper and lower sides at intervals in the length direction of each frame member 20A, 20B. It is done. Bolts 17 for attaching the vertical frame portions 21A and 22A of the fan guards 21 and 22 to the frame members 20A and 20B are screwed into the screw holes.

  The four connecting members 20C to 20F are arranged, for example, at equal intervals from the front side between the frame members 20A and 20B. The four connecting members 20C to 20F also serve as a frame of bracket side fan guards 23 and 24 described later. Further, a motor main body 19A of the fan motor 19 is integrally attached to the two connecting members 20D and 20E located on the center side using bolts 17. The foremost connecting member 20C and the rearmost connecting member 20F are disposed at positions radially outward of the cooling air flow opening 16A. Thus, between the frame members 20A and 20B, the connecting members 20C and 20D and the connecting members 20E and 20F can be opened, so that the cooling air can be efficiently circulated using the openings. it can.

  The fan bracket 20 is provided with a flat valve attachment plate 20G positioned on one side in the longitudinal direction between the frame members 20A and 20B, for example, on the front side. A fan control valve 25 described later is attached to the valve attachment plate 20G.

  The fan bracket 20 is disposed at an upper and lower intermediate position of the cooling air flow opening 16A such that the mounted fan motor 19 is located at the center of the cooling air flow opening 16A of the fan shroud 16. In this state, bolts 17 inserted into the bolt insertion holes 20A1 and 20B1 of the frame members 20A and 20B are screwed to the bracket mounting seats 16C and 16D of the fan shroud 16. Thereby, the fan bracket 20 can be integrally attached to the fan shroud 16 (the heat exchanger mounting frame 13 side).

  The fan guards 21 and 22 are respectively disposed at positions on both sides of the fan bracket 20 between the upper side and the lower side. The two fan guards 21 and 22 have the remaining opening portion of the cooling air flow opening 16A of the fan shroud 16 opened from the fan bracket 20, that is, the upper side sandwiching the fan bracket 20 in FIG. A D-shaped opening indicated by the range A and the lower range B can be covered. On this, each fan guard 21 and 22 can distribute cooling air by slit-like crevices.

  The upper fan guard 21 is configured as a rectangular mesh member extending forward and backward along the fan bracket 20. The fan guard 21 covers the remaining opening portion (range A) of the cooling air flow opening 16A which is open upward and away from the fan bracket 20. By covering the engine 9 side of the cooling fan 18, the fan guard 21 can protect the cooling fan 18 from the debris even if, for example, the fan belt is damaged and the debris is scattered. The fan guard 21 can also prevent contact with the cooling fan 18 at the time of maintenance around the engine 9.

  As shown in FIGS. 6 and 8, the upper fan guard 21 has, for example, four vertical frame portions 21A arranged at intervals in the front and rear directions, and the upper and lower portions of each vertical frame portion 21A. And a plurality of rod-like members 21C arranged in a row with predetermined gaps extending upward and downward, extending over the respective vertical frame portions 21A. Each vertical frame portion 21A is detachably mounted at its lower portion to the upper frame member 20A using a bolt 17. Further, in the horizontal frame portion 21B, four bolt insertion holes 21D corresponding to the screw holes of the guard mounting seats 16E located on the upper side of the fan shroud 16 are provided. Thereby, the fan guard 21 can be attached to the fan shroud 16 so as to be removable by screwing the bolt 17 inserted into each bolt insertion hole 21D into the screw hole of each guard mounting seat 16E.

  The lower fan guard 22 and the upper fan guard 21 sandwiching the fan bracket 20 form an upper and lower symmetrical shape. The lower fan guard 22 has the same basic configuration and functional aspect as the upper fan guard 21 and therefore will be described in a simplified manner. The lower fan guard 22 covers the remaining open portion (range B) of the cooling air flow opening 16A which is open downward and away from the fan bracket 20. The lower fan guard 22 includes four vertical frame portions 22A, horizontal frame portions 22B, a plurality of rod-like members 22C, and four bolt insertion holes 22D. Each vertical frame portion 22A is detachably attached at its upper portion to the lower frame member 20B using a bolt 17. Further, the horizontal frame portion 22B can be attached and removably attached to each guard mounting seat 16E located below the fan shroud 16 by bolts 17 inserted into the bolt insertion holes 22D.

  Here, the upper fan guard 21 and the lower fan guard 22 are disposed in parallel (horizontally) with the fan bracket 20 in the flow direction of the cooling air without overlapping with the fan bracket 20 in the flow direction of the cooling air. . Therefore, the fan guards 21 and 22 can be disposed within the range of the thickness dimension (the dimension in the flow direction of the cooling air) of the fan bracket 20. Thereby, the increase in the external dimension by providing the fan guards 21 and 22 can be suppressed.

  The bracket side fan guards 23 and 24 are located between the frame members 20A and 20B of the fan bracket 20, and are provided before and after sandwiching the fan motor 19. A plurality of bracket side fan guards 23 positioned on the front side extend in a row between the connecting members 20C and 20D of the fan bracket 20 and the connecting members 20C and 20D, and have predetermined gaps in the upper and lower directions. It is comprised by 23 A of rod-shaped bodies. A plurality of bracket side fan guards 24 positioned on the rear side extend in a row between the connecting members 20E and 20F of the fan bracket 20 and the connecting members 20E and 20F, and have predetermined gaps in the upper and lower directions. And the rod-shaped body 24A.

  Thereby, the bracket side fan guards 23 and 24 can cover the cooling fan 18 while circulating the cooling air between the frame members 20A and 20B of the fan bracket 20.

  The fan control valve 25 is attached to a position deviated to the front side from the cooling air flow opening 16 A of the fan shroud 16, specifically, the valve mounting plate 20 G of the fan bracket 20. The fan control valve 25 controls the rotation of the cooling fan 18 and is connected to the hydraulic pump 10. The fan control valve 25 is disposed in parallel with the fan motor 19 in the flow direction of the cooling air, and therefore, can be disposed within the range of the thickness dimension (dimension of the flow direction of the cooling air) of the fan motor 19 . Thereby, the increase in the outside dimension by providing the fan control valve 25 can be suppressed.

  The two hydraulic lines 26 and 27 connect the motor main body 19 A of the fan motor 19 and the fan control valve 25. The hydraulic lines 26, 27 are connected to the motor main body 19A, and are hoses connecting pipe members 26A, 27A extending to the front side along the lower frame member 20B, pipe members 26A, 27A and the fan control valve 25. It is constituted by members 26B and 27B. The pipe members 26A and 27A are made of metal and fixed to the frame member 20B by using the clamp member 28.

  Here, as shown in FIG. 4, a straight portion of the pipe members 26A, 27A extending along the frame member 20B is provided at a position overlapping the frame member 20B of the fan bracket 20 in the flow direction of the cooling air. There is. As a result, the pipe members 26A, 27A do not disturb the flow of the cooling air, so the flow of the cooling air can be made smooth to enhance the cooling efficiency.

  When the entire hydraulic pipeline is a hydraulic hose, it is necessary to cover the hydraulic hose with a cover on the assumption that the hydraulic hose is damaged and the oil is scattered. However, since each of the hydraulic pipelines 26 and 27 has the portions facing the cooling fan 18 as the metal pipe members 26A and 27A, the cover can be omitted. This also makes it possible to smooth the flow of the cooling air and to enhance the cooling efficiency.

  The heat exchange device 11 according to the present embodiment has the above-described configuration. Next, the operation of the heat exchange device 11 will be described.

  When hydraulic fluid is supplied to the fan motor 19 by the fan control valve 25 and the cooling fan 18 is rotationally driven by the fan motor 19, the outside air is drawn into the building cover 8 as cooling air. As a result, the radiator 12A, the oil cooler 12B, and the intercooler 12C that constitute the heat exchanger 12 can respectively cool the engine cooling water, the hydraulic oil, and the intake air of the engine 9 by the sucked cooling air.

  Thus, according to the present embodiment, the fan bracket 20 for mounting the fan motor 19 to the heat exchanger mounting frame 13 has heat exchanger mounting frame 13 on both sides of the fan shroud 16 across the cooling air flow opening 16A. Attached to On this, in the remaining opening portions (range A and range B) of the cooling air circulation opening 16A of the fan shroud 16 which is open from the fan bracket 20, a fan covering the cooling fan 18 while circulating the cooling air Guards 21 and 22 are provided.

  Therefore, the fan guards 21 and 22 can be arranged in parallel (laterally) with the fan bracket 20 in the flow direction of the cooling air without overlapping with the fan bracket 20 in the flow direction of the cooling air. Thus, the fan guards 21 and 22 can be disposed within the range of the thickness dimension (the dimension in the flow direction of the cooling air) of the fan bracket 20.

  As a result, since it is possible to suppress an increase in the outer dimensions due to the provision of the fan guards 21 and 22, the outer dimensions of the heat exchange device 11 can be reduced in the flow direction of the cooling air, and Can be installed.

  The fan bracket 20 includes a pair of frame members 20A and 20B separated from each other, and bracket side fan guards 23 and 24 provided between the frame members 20A and 20B and covering the cooling fan 18 while circulating the cooling air. There is. Further, the fan motor 19 is provided between the pair of frame members 20A and 20B. Thus, the fan motor 19 can be stably supported by the pair of frame members 20A and 20B. Moreover, the bracket side fan guards 23 and 24 can cover the cooling fan 18 while circulating the cooling air between the frame members 20A and 20B of the fan bracket 20, and the circulation amount of the cooling air can be increased to improve the cooling efficiency. Can be enhanced.

  The fan bracket 20 has a fan control valve 25 disposed at a position out of the cooling air flow opening 16A of the fan shroud 16 to control the rotation of the cooling fan 18, and a hydraulic pipe connecting the fan motor 19 and the fan control valve 25. Paths 26, 27 are provided. Each hydraulic line 26, 27 is provided at a position overlapping the fan bracket 20 in the flow direction of the cooling air. As a result, the hydraulic pipelines 26 and 27 (pipe members 26A and 27A) do not disturb the flow of the cooling air, so that the flow of the cooling air can be made smooth to improve the cooling efficiency of the heat exchanger 11. it can.

  The fan bracket 20 is disposed at an intermediate position between the upper and lower sides of the cooling air flow opening 16 A of the fan shroud 16. On this, the fan guards 21 and 22 are formed by two members, and the fan guards 21 and 22 are respectively disposed at positions on both sides of the fan bracket 20. As a result, the cooling air flow opening 16A which is separated from the fan bracket 20 can be covered by the two fan guards 21 and 22.

  The heat exchanger mounting frame 13 is formed as a frame structure surrounded by the front plate 13A, the rear plate 13B, the upper plate 13C and the lower plate 13D. The fan bracket 20 is attached at its both ends between the front plate 13A and the rear plate 13B and at an intermediate portion between the upper plate 13C and the lower plate 13D. Thus, the fan bracket 20 can support the fan motor 19 on an axis extending in the flow direction of the cooling air through the central portion of the heat exchanger mounting frame 13.

  In the embodiment, the heat exchanger 12 is exemplified by the radiator 12A, the oil cooler 12B, and the intercooler 12C. However, the present invention is not limited to this, and for example, a condenser for cooling the refrigerant (fluid to be cooled) of the air conditioner, a fuel cooler for cooling the fuel supplied to the engine 9, etc. It is also good. Also, the heat exchanger may be configured of any one or two of a radiator, an oil cooler, and an intercooler.

  In the embodiment, the fan motor 19 is illustrated as a hydraulic motor whose power source is hydraulic oil (pressure oil). However, the present invention is not limited to this. For example, a fan motor may be an electric motor using electricity as a power source.

  In the embodiment, the fan bracket 20 is disposed at an upper and lower intermediate position of the cooling air flow opening 16A of the fan shroud 16. However, the present invention is not limited to this, and the fan bracket 20 may be disposed at an intermediate position in the left and right directions of the cooling air flow opening 16A of the fan shroud 16. That is, the fan brackets may be arranged to extend upward and downward, and the fan guards may be arranged at positions sandwiching the fan brackets in the lateral direction.

  Although the case where suction type cooling fan 18 was used was illustrated in an embodiment, the present invention is not limited to this, for example, it is good also as composition using a cooling type cooling fan.

  Furthermore, in the embodiment, the hydraulic shovel 1 is taken as an example of a construction machine on which the heat exchange device 11 is mounted. However, the present invention is not limited to this, and can be widely applied to other construction machines such as hydraulic cranes and wheel loaders.

11 Heat Exchanger 12 Heat Exchanger 13 Heat Exchanger Mounting Frame 13A Front Plate 13B Back Plate 13C Top Plate 13D Bottom Plate 16 Fan Shroud 16A Cooling Air Flow Opening 18 Cooling Fan 19 Fan Motor 20 Fan Bracket 20A, 20B Frame member 21, 22 Fan guard 23, 24 Bracket side fan guard 25 Fan control valve 26, 27 Hydraulic line A, B range (residual opening)

Claims (5)

A heat exchanger for cooling a heated fluid using a cooling air, a heat exchanger mounting frame to which the heat exchanger is mounted, and one side of the flow direction of the cooling air with respect to the heat exchanger mounting frame A fan shroud having a cooling air flow opening, a cooling fan disposed in the fan shroud for sending the cooling air to the heat exchanger, a fan motor for rotationally driving the cooling fan, and the fan And a fan bracket mounting the motor to the heat exchanger mounting frame, the heat exchanging device comprising:
Both sides of the fan bracket sandwiching the cooling air flow opening of the fan shroud are attached to the heat exchanger mounting frame,
A fan guard that covers the cooling fan while circulating the cooling air is provided at the remaining opening portion of the cooling air circulation opening of the fan shroud that is open from the fan bracket. Heat exchange device. The fan bracket includes a pair of frame members separated from each other, and a bracket-side fan guard provided between the frame members and covering the cooling fan while circulating the cooling air.
The heat exchange device according to claim 1, wherein the fan motor is provided between the pair of frame members. A fan control valve disposed on the fan bracket at a position out of the cooling air flow opening of the fan shroud to control the rotation of the cooling fan, and a hydraulic pipeline connecting the fan motor and the fan control valve And are provided,
The heat exchange device according to claim 1, wherein the hydraulic pipeline is provided at a position overlapping the fan bracket in the flow direction of the cooling air. The fan bracket is disposed at an intermediate position among the cooling air flow openings of the fan shroud, in any one of the upper, lower, left, and right directions;
The heat exchange device according to claim 1, wherein the fan guard is formed of two members, and the fan guards are respectively disposed at positions on both sides of the fan bracket. The heat exchanger mounting frame is formed as a frame structure surrounded by a front plate, a rear plate, an upper plate and a lower plate,
The heat exchange according to claim 1, wherein both ends of the fan bracket are attached between the front plate and the rear plate and at an intermediate portion between the upper plate and the lower plate. apparatus.

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