JPH1047061A - Heat-exchanger for construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent lowering in cooling efficiency by a method wherein adhesion of dust to a heat-exchanger is suppressed and dust adhered and accumulated on the heat-exchanger is easily removed. SOLUTION: Since a second dust capture net 27 is disposed between a radiator 22 and an oil cooler 23, dust passing through a first dust capture net 25 is captured by the second dust capture net 27 and adhesion of dust to a radiator 22 is suppressed. Further, since the second dust capture net 27 is taken out and in along a guide rail 26, dust captured at the dust capture net 27 is easily removed. Further, since a dust removing brush 30 is arranged at the second dust capture net 27, dust accumulated on the radiator 22 is automatically scratched off and removed by the dust removing brush 30 in linkage with operation when the dust capture net is taken in and out.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger for a construction machine which is mounted on, for example, a hydraulic shovel, a hydraulic crane, a wheel loader, a bulldozer and the like, and is suitable for cooling engine cooling water and hydraulic oil. .

[0002]

2. Description of the Related Art In general, a construction machine is provided with a hydraulic pump operated by an engine, and various actuators are driven by hydraulic oil discharged from the hydraulic pump. In the construction machine, an engine and a hydraulic pump are provided close to each other, and a radiator for cooling engine cooling water and an oil cooler for cooling hydraulic oil are provided to face each other.

A heat exchanging device of a hydraulic shovel will be described as an example of a conventional heat exchanging device for construction machines with reference to FIGS. 6 to 10. FIG.

In the drawings, reference numeral 1 denotes a lower traveling body, 2 denotes an upper revolving body mounted on the lower traveling body 1 so as to be pivotable,
The upper swing body 2 includes a swing frame 3 having a frame structure,
A machine room 4 provided on the turning frame 3, a driving room 5 provided on the turning frame 3 at the front left side of the machine room 4, and a machine room 4 located at the rear side of the machine room 4. A counter weight 6 is supported at the rear end of the revolving frame 3. The counter weight 6 has external air inlets 6A, 6A through which external air serving as cooling air flows, as shown in FIG.
Are formed in the front-back direction. A working device 7 for excavating earth and sand is provided on the front side of the upper revolving unit 2 so as to be able to move up and down.

Here, as shown in FIG. 8, the machine room 4 is covered with a building cover 8, in which an engine 9, a heat exchange device 10 and the like to be described later are accommodated.

Reference numerals 9 and 9 denote two engines mounted in the machine room 4 and mounted on the turning frame 3.
Is provided with a fan drive shaft 9A for rotationally driving a cooling fan 16 described later, protruding rearward. Each engine 9 drives a hydraulic pump (not shown) that supplies pressure oil to the lower traveling body 1 and the working device 7.

[0007] Reference numerals 10 and 10 denote two heat exchange devices provided at the distal end side of the fan drive shaft 9A of each engine 9. Each of the heat exchange devices 10 includes a radiator 11, an oil cooler 12, and a fan shroud 14 to be described later. , A cooling fan 16 and the like.

Reference numeral 11 denotes a radiator as a first heat exchanger provided near the tip end of the fan drive shaft 9A. The radiator 11 has a hose, as shown in FIGS.
A flow pipe 11A, which is connected to a water jacket (not shown) of the engine 9 via a pump or the like, and through which cooling water for cooling the engine circulates,
A, and a plurality of radiating fins 11B, 1A arranged in line along the cooling air generated by the cooling fan 16.
, A rectangular support frame 11C provided so as to surround each of the radiation fins 11B and the flow pipe 11A, and the flow pipe 11A provided at the upper end and the lower end of the support frame 11C. The radiator 11 has a lower bracket 11F and a lower bracket 11F. The lower bracket 11F has a lower bracket 11F and a lower bracket 11F.

The radiator 11 is connected to the engine 9
The cooling water whose temperature has risen due to the heat of
By circulating and circulating through the circulation pipe portion 11A through the 1E, the heat of the cooling water is radiated to the air through the radiation fins 11B to cool the cooling water.

Reference numeral 12 denotes an oil cooler as a second heat exchanger which is provided in close contact with one side of the radiator 11 (upstream of the cooling air by the cooling fan 16) so as to face the radiator 11. The cooler 12 is connected to a hydraulic oil tank (neither is shown) through a pipe or the like, and an oil communication pipe portion 12A through which the hydraulic oil circulates and is fixed to the oil communication pipe section 12A. A plurality of radiating fins 12 arranged in line along the cooling wind generated by the cooling fins 16
B, 12B,..., The respective radiation fins 12B, and the oil passage tube 1
Rectangular support frame 12C provided to surround 2A
And provided at the upper end and lower end of the support frame 12C,
The oil cooler 12 is roughly fixed to one end surface of the radiator 11 via a plurality of bolts 13, 13,..., Which is composed of an upper tank 12D and a lower tank 12E communicating with the oil passage pipe portion 12A.

The oil cooler 12 circulates and circulates the operating oil whose temperature has increased due to a hydraulic pressure loss (pressure loss) through the tanks 12D and 12E into the oil passage 12A. Heat is applied to each radiating fin 12B
The heat is radiated into the air through the air to cool.

A fan shroud 14 is mounted on the other side (side of the engine 9) of the radiator 11 via a plurality of bolts 13, 13,... And is formed in a shallow bottom box shape from a thin plate. On the other side, a large-diameter insertion hole (not shown) into which the cooling fan 16 is inserted is formed. Further, a fan guard 15 is attached to the fan shroud 14 via a plurality of bolts 13, 13,.

A cooling fan 16 is located in the fan shroud 14 and mounted on a fan drive shaft 9A of the engine 9. The cooling fan 16 is driven to rotate via the fan drive shaft 9A, thereby providing a counterweight. The outside air is introduced into the oil cooler 12 and the radiator 11 through the outside air inlet 6A as cooling air.

Reference numeral 17 denotes a dust catching net attached to one side of the oil cooler 12, and the dust catching net 17
Is composed of a square frame 17A and a net member 17B formed by weaving a wire made of a metal material, a resin material, or the like so as to cover the inside of the frame 17A. The size is set so coarse that the cooling air can pass without resistance. Further, the dust capturing net 17 is configured such that the frame body 17A is a support frame 1 of the oil cooler 12.
Screwed to 2C.

The heat exchanging device 10 for a hydraulic shovel according to the prior art has the above-described configuration, and each engine 9
The cooling fan 16 is rotated by this operation, whereby outside air is sucked into the machine room 4 as cooling air from each outside air inlet 6A of the counter weight 6. The cooling air passes through each oil cooler 12 and the radiator 11 continuously. At the time of the passage, the cooling air exchanges heat with the hydraulic oil flowing through the oil cooler 12 to cool the hydraulic oil. The heat of the cooling water flowing through the heat exchanger is exchanged to cool the cooling water.

Dust 18 and the like are sucked from each outside air inlet 6A together with the outside air. Of these dusts, relatively large ones are captured by a dust capturing net 17 provided on one side of the oil cooler 12. Is done.

On the other hand, when the dust 18 that has passed through the dust capturing net 17 adheres to and accumulates on the radiation fins 11B of the radiator 11, the radiation fin 12B of the oil cooler 12, and the like, the accumulated dust 18 is blown by air or washed with water. Then, the radiator 11 and the oil cooler 12 are cleaned.

[0018]

In the heat exchanger 10 according to the prior art described above, each radiator fin 11B of the radiator 11 and each radiator fin 1 of the oil cooler 12 are provided.
When removing dust 18 adhering and accumulating on 2B or the like,
Air blow and water washing are performed from one side of the oil cooler 12 through the outside air inlet 6A.

However, in the conventional heat exchanger 10,
Since the oil cooler 12 is closely attached to one side surface of the radiator 11, the dust 18 attached to the radiator 11 located at the back cannot be easily removed. As a result, not only does it take a long time to clean the radiator 11, but also the dust 18 remains and accumulates on the radiation fins 11B of the radiator 11, so that
There is a problem that the cooling efficiency of the engine 1 is reduced and the engine 9 is overheated.

Therefore, it is conceivable to dispose the radiator 11 and the oil cooler 12 at a predetermined distance from each other so that air blow or cleaning water can be sprayed on one side surface of the radiator 11. However, in this case, it is necessary to increase the installation space of the heat exchange device 10, and the machine room 4
There is a problem that (the upper revolving unit 2) becomes large.

The present invention has been made in view of the above-mentioned problems of the prior art, and suppresses the adhesion of dust to the heat exchanger, and makes it possible to easily remove the dust attached and deposited on the heat exchanger. It is an object of the present invention to provide a heat exchanger for a construction machine which can prevent a decrease in cooling efficiency.

[0022]

In order to solve the above-mentioned problems, a heat exchanger for a construction machine employed in the first aspect of the present invention includes a first heat exchanger provided in a machine room of the construction machine. A second heat exchanger provided facing the first heat exchanger, and a second heat exchanger provided outside the first heat exchanger or the second heat exchanger; A cooling fan for supplying cooling air to the heat exchanger; a dust capturing net positioned between the first heat exchanger and the second heat exchanger so as to be able to be taken in and out; And a brush provided on a tip end side of the dust catching net in and out of the dust catching net in order to remove the attached dust.

With this configuration, for example, when the cooling air flows in the order of the second heat exchanger and the first heat exchanger, the dust capturing net captures the dust in the cooling air. It prevents dust from adhering and accumulating on the first heat exchanger. On the other hand, when the cooling air flows in the order of the first heat exchanger and the second heat exchanger, it is possible to prevent the dust capturing net from adhering and accumulating dust on the second heat exchanger. . Further, dust captured by the dust capturing net can be easily removed by pulling out the dust capturing net from between the heat exchangers. Furthermore, when the dust catching net is taken in and out to remove the trapped dust, the brush moves in conjunction with the taking out and taking in operation, and the dust attached to the heat exchanger can be automatically removed by the brush.

According to a second aspect of the present invention, there is provided a heat exchanger for a construction machine, comprising a first heat exchanger provided in a machine room of the construction machine, and a heat exchanger opposed to the first heat exchanger. A second heat exchanger, a cooling fan provided outside the first heat exchanger or the second heat exchanger, and supplying cooling air to the first and second heat exchangers; A pair of guide members provided on the left and right between the first heat exchanger and the second heat exchanger, and a dust capturing net provided between the respective guide members so as to be able to be taken in and out vertically. A brush provided on a lower end side of the dust catching net to remove dust adhering to the heat exchanger.

With this configuration, for example, when cooling air flows in the order of the second heat exchanger and the first heat exchanger, the dust capturing net captures dust in the cooling air. It prevents dust from adhering and accumulating on the first heat exchanger. On the other hand, when the cooling air flows in the order of the first heat exchanger and the second heat exchanger, it is possible to prevent the dust capturing net from adhering and accumulating dust on the second heat exchanger. . Further, the dust captured by the dust capturing net can be easily removed by pulling the dust capturing net upward along the guide members from between the heat exchangers. Furthermore, when the dust catching net is vertically moved in and out along each guide member in order to remove the trapped dust, the brush provided on the lower end side of the dust catching net moves in conjunction with this putting in and out operation, and the brush is moved. As a result, dust attached to the heat exchanger can be automatically removed.

[0026]

FIG. 1 is a block diagram showing an embodiment of the present invention.
5 will be described in detail. In the embodiment, the same components as those in the prior art shown in FIGS. 6 to 10 are denoted by the same reference numerals, and description thereof will be omitted.

In the figure, reference numeral 21 denotes a heat exchange apparatus 1 according to the prior art.
The heat exchange device according to the present embodiment is used in place of 0, and the heat exchange device 21 includes a fan shroud 14, a fan guard 15, a cooling fan 16 described in the related art, a radiator 22, an oil cooler 23, It comprises a first dust capturing net 25, a guide rail 26, a second dust capturing net 27, a dust removing brush 30, and the like.

Numeral 22 denotes a radiator as a first heat exchanger. As shown in FIG. 4, the radiator 22 circulates and circulates cooling water for cooling the engine, similarly to the radiator 11 described in the prior art. The flow pipe 22A, a plurality of heat radiation fins 22B, 22B,... That radiate heat of the cooling water flowing through the flow pipe 22A into the air, and surround each of the heat radiation fins 22B and the flow pipe 22A. And a lower tank 22E provided at the upper end and lower end of the support frame 22C, and support brackets 22F and 22F for fixing the radiator 22. ing.

Reference numeral 23 denotes an oil cooler provided on one side of the radiator 22 so as to face the radiator 22 via respective guide rails 26. The oil cooler 23 is similar to the oil cooler 12 described in the prior art. , An oil passage portion 23A through which the working oil circulates and a plurality of radiating fins 23B, 23B,... Which radiate the heat of the working oil flowing through the oil passage portion 23A into the air. A rectangular support frame 23C provided so as to surround the radiation fins 23B and the oil passage tube portion 23A, and upper tanks 23D and lower tanks 23E provided at the upper and lower ends of the support frame 23C.
The oil cooler 23 includes a plurality of bolts 24, 24,
Are fixed to one end surface of the radiator 22 via.

Here, the bolts 24 are longer than the conventional bolts 13 by the amount that the guide rails 26 are interposed between the radiator 22 and the oil cooler 23.

Numeral 25 denotes a first dust catching net attached to one side surface of the oil cooler 23. The first dust catching net 25 has a rectangular frame like the dust catching net 17 described in the prior art. And a net member 25B formed by weaving a wire made of a metal material, a resin material, or the like so as to cover the inside of the frame 25A. The size of the mesh of the net member 25B is such that cooling air is generated. It is set coarse enough to allow passage without resistance.

Reference numerals 26, 26 denote guide rails forming guide members interposed between the radiator 22 and the oil cooler 23. Each of the guide rails 26 is, as shown in FIG.
It is located on the left and right of the radiator 22, and is disposed extending vertically along the support frame 22C. Further, guide grooves 26A slidably supporting left and right side frames 28C of a frame body 28 to be described later are formed on the respective guide rails 26 so as to face each other in the vertical direction. Each guide rail 26 supports the second dust capturing net 27 so as to be vertically movable by its guide groove 26A, and is fixed between the radiator 22 and the oil cooler 23 by bolts 24. .

27 is a radiator 22 and an oil cooler 23
And a second dust catching net 27 disposed between the upper frame 28 and the second dust catching net 27, as shown in FIG.
A, a frame 28 formed in a rectangular shape from the lower frame 28B and the left and right side frames 28C, 28C, and a wire made of a metal material, a resin material, or the like is woven to cover the inside of the frame 28. And the frame member 2
The right and left side frames 28C of 8 are fitted in the guide grooves 26A of each guide rail 26 so as to be slidable in the vertical direction. Further, the size of the mesh of the net member 29 is set to be equal to or smaller than the net member 25B of the first dust capturing net 25, and thereby the small dust 18 passing through the first dust capturing net 25 is removed. It can be captured.

Numeral 30 denotes a dust removing brush disposed on the lower end side of the dust capturing net 27. The dust removing brush 30 has a tip end extending toward the radiator 22 and is sufficiently attached to each radiation fin 22B of the radiator 22. Is in contact with The dust removal brush 30 is disposed extending in the left-right direction along the lower frame 28B of the frame 28, and is detachably screwed to the other surface of the lower frame 28B via the back plate 30A. I have.

Reference numeral 31 denotes a long plate-like cover plate provided over the upper end of each guide rail 26. The cover plate 31 inserts a dust capturing net 27 between the radiator 22 and the oil cooler 23. The guide rail 26 is detachably fixed to each of the guide rails 26 by screws.

The heat exchanging device 21 of the hydraulic shovel according to the present embodiment has the above-described configuration, and its basic operation is not particularly different from that of the prior art. Therefore, each of the dust capturing nets 25,
27 will be described.

First, with the second dust catching net 27 inserted between the radiator 22 and the oil cooler 23,
When the cooling fan 16 is driven to rotate, the counter weight 6
The outside air is sucked from the outside air inlet 6A as cooling air.
At this time, among the dust 18 contained in the cooling air, relatively large dust 18 is captured by the first dust capturing net 25. Part of the dust 18 that has passed through the first dust capturing net 25 adheres to the heat radiation fins 23B of the oil cooler 23, and part of the dust 18 passes through the oil cooler 23.

Next, the dust 1 passing through the oil cooler 23
8 reaches the second dust capturing net 27. At this time, the second dust capturing net 27 can capture the fine dust 18 contained in the cooling air by the net member 29.

On the other hand, the captured dust 18 accumulates on the net member 29 of the second dust capturing net 27, and the dust 18 passing through the second dust capturing net 27 adheres to the radiation fins 22B of the radiator 22 and the like. When the dust is deposited, the cover plate 31 is removed and the second dust capturing net 27 is drawn out along each guide rail 26. Thus, the dust 18 accumulated while the second dust capturing net 27 is taken out can be easily cleaned by air blow or water washing.

When the second dust catching net 27 is pulled out, the dust removing brush 30 attached to the lower end of the frame 28 is in contact with each of the radiating fins 22B of the radiator 22 in conjunction with this pulling operation. Since it moves to the upper side, each of the radiation fins 22B is
The dust 18 deposited on the surface can be automatically scraped off and removed. Further, when the cleaning of the second dust catching net 27 is completed and the dust catching net 27 is pushed between the radiator 22 and the oil cooler 23, the dust accumulated on each radiation fin 22B by the dust removing brush 30 is also used. 18 can be scraped off automatically.

Thus, according to the present embodiment, the second dust catching net 27 is provided between the radiator 22 and the oil cooler 23, and the first dust catching net 25 is provided by the second dust catching net 27. The dust 18 that has passed through can be captured. As a result, the dust 18 is
Of the radiator 22 can be suppressed.
Overheating of the engine 9 due to a decrease in the cooling efficiency of the engine 9 can be improved, and the reliability and life can be improved.

Further, since the second dust catching net 27 can be put in and taken out along each guide rail 26, when the dust 18 trapped on the dust catching net 27 is accumulated, the dust catching net 27 is moved to the radiator. By drawing out from between the oil cooler 22 and the oil cooler 23, the accumulated dust 18 can be easily removed, and the workability at the time of the cleaning operation can be improved to facilitate the handling.

Further, a dust removing brush 30 is provided on the second dust catching net 27, and the dust removing brush 30 is interlocked with an operation for putting the second dust catching net 27 in and out.
Is moved up and down, and the radiator 22 is
The dust 18 deposited on each of the radiating fins 22B can be automatically scraped off and removed. Accordingly, the radiator 22 can be automatically cleaned without greatly separating the radiator 22 and the oil cooler 23, and the overheating of the engine 9 due to a decrease in cooling efficiency can be prevented. In addition, the second dust capturing net 2
7 is put in and out along each guide rail 26,
The dust removing brush 30 is connected to each radiating fin 2 of the radiator 22.
The dust 18 can be efficiently scraped off by the dust removing brush 30.

In the above-described embodiment, the radiator 22 is taken as an example of the first heat exchanger, and the oil cooler 23 is taken as an example of the second heat exchanger, and the cooling air flowing from the outside air inlet 6A is used as the oil cooler 23. , The case of circulating in the order of the radiator 22 is exemplified, but the present invention is not limited to this,
For example, the radiator and the oil cooler may be replaced with each other, and the cooling air may be circulated in the order of the radiator and the oil cooler. Further, the cooling air may be circulated so as to be exhausted from the machine room via a radiator and an oil cooler from an outside air inlet.

In the above embodiment, the second dust catching net 27 is vertically inserted and removed along each guide rail 26, and the dust removing brush 30 is attached to the lower frame 28B of the frame 28. Although described by way of example, the present invention is not limited to this, and the dust capturing net may be taken in and out in the left-right direction. In this case, the dust removal brush may be provided by the left and right side frames of the frame. What is necessary is just to attach to the side frame located in the front-end | tip side of a taking-out direction.

In the above-described embodiment, the case where the first dust catching net 25 is attached to one side surface of the oil cooler 23 has been exemplified. Alternatively, for example, the first dust catching net may be connected to the outside air of the counter weight. You may make it provide in an introduction port etc.

Further, in the above-described embodiment, a dust removing brush 30 is provided on the other side of the lower frame 28B of the frame 28 at the lower end of the dust capturing net 27, and each of the radiators 22 is radiated by the dust removing brush 30. Dust 18 adhered to the fin 22B
However, the present invention is not limited to this. For example, as shown in a modification shown in FIG. 5, another dust removing brush 30 'is provided on one surface side of the lower frame 28B of the frame 28, and the dust is removed. The dust 18 attached to each radiating fin 23B of the oil cooler 23 may be removed by the removing brush 30 '.

In the above embodiment, the radiator 22 and the oil cooler 23 have been described as examples of the heat exchanger. However, if the two heat exchangers are arranged to face each other,
Without limiting to the combination of radiator and oil cooler,
It can be used in combination with the heat exchanger of the cabin air conditioner.

Further, in the above-described embodiment, the heat exchanging device 21 of the hydraulic shovel has been described as an example of the heat exchanging device of the construction machine. However, the present invention is not limited to this.
For example, the present invention may be applied to a heat exchange device of another construction machine such as a hydraulic crane, a wheel loader, and a bulldozer.

[0050]

As described above in detail, according to the first aspect of the invention, for example, when the cooling air flows in the order of the second heat exchanger and the first heat exchanger, the cooling air flows through the dust capturing net. Dust in the cooling air can be captured to prevent the dust from adhering and accumulating on the first heat exchanger. On the other hand, the first heat exchanger,
When the cooling air flows in the order of the second heat exchanger, it is possible to prevent dust from adhering and accumulating on the second heat exchanger by the dust capturing net. Thus, for example, overheating of the engine due to a decrease in cooling efficiency and the like can be prevented, and reliability and life can be improved. Further, the dust captured by the dust capturing net can be easily removed by pulling out the dust capturing net from between the heat exchangers, so that the workability during the cleaning operation can be improved. In addition, when taking the dust capture net in and out,
Since the brush is also taken in and out in conjunction with the movement, dust attached to the heat exchanger can be automatically removed by the brush, and the heat exchanger can be easily cleaned.

According to the second aspect of the present invention, for example, when the cooling air flows in the order of the second heat exchanger and the first heat exchanger, the dust in the cooling air is captured by the dust capturing net. Thus, it is possible to prevent dust from adhering and accumulating on the first heat exchanger. On the other hand, when the cooling air flows in the order of the first heat exchanger and the second heat exchanger, it is possible to suppress the attachment and accumulation of dust on the second heat exchanger by the dust capturing net. . Thereby, for example, overheating of the engine due to a decrease in cooling efficiency can be prevented, and reliability and life can be improved. In addition, dust captured by the dust capturing net can be easily removed by pulling out the dust capturing net from between the heat exchangers along each guide member, thereby improving workability in cleaning work. be able to. In addition, when taking the dust capture net in and out,
Since the brush is also taken in and out in conjunction with the movement, dust attached to the heat exchanger can be automatically removed by the brush, and the heat exchanger can be easily cleaned. In addition, the brush can be brought into contact with the heat exchanger with a certain amount of contact by moving the dust catching net in and out along each guide member, and the dust adhering to the heat exchanger can be efficiently removed. .

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view showing a heat exchange device according to an embodiment of the present invention.

FIG. 2 is an external perspective view showing a radiator, a second dust capturing net, and the like in FIG. 1;

FIG. 3 is an external perspective view showing a second dust capturing net from a dust removing brush side.

FIG. 4 is an enlarged side view of a partially broken main part showing a state in which dust accumulated on a radiator is removed by a dust removal brush by pulling out a second dust capturing net.

FIG. 5 is an enlarged side view of a main part of a partially broken view showing a heat exchange device according to a modification of the present invention, viewed from the same position as in FIG.

FIG. 6 is an overall view showing a hydraulic excavator to which a heat exchange device according to the related art is applied.

FIG. 7 is an enlarged plan view showing a machine room, a counterweight, and the like in FIG. 6;

FIG. 8 is an enlarged sectional view of a main part of the machine room as viewed from the direction of arrows VIII-VIII in FIG.

FIG. 9 is an enlarged side view showing the heat exchange device in FIG. 8;

FIG. 10 is an enlarged side view of a main part with a part broken away showing a radiator, an oil cooler and the like.

[Explanation of symbols]

 4 Machine Room 16 Cooling Fan 21 Heat Exchanger 22 Radiator (First Heat Exchanger) 23 Oil Cooler (Second Heat Exchanger) 26 Guide Rail (Guide Member) 27 Second Dust Capture Net 30, 30 'Dust Removal brush (brush)

Claims (2)

[Claims] 1. A first heat exchanger provided in a machine room of a construction machine, a second heat exchanger provided opposite to the first heat exchanger, and the first heat exchange. A cooling fan provided outside the heat exchanger or the second heat exchanger and supplying cooling air to the first and second heat exchangers; and a cooling fan for the first heat exchanger and the second heat exchanger. A dust-catching net positioned between them so as to be able to be taken in and out, and a brush provided at a tip end side of the dust-catching net in and out of the dust-catching net to remove dust attached to the heat exchanger. Heat exchange equipment for construction machinery. 2. A first heat exchanger provided in a machine room of a construction machine, a second heat exchanger provided opposite to the first heat exchanger, and the first heat exchange. A cooling fan provided outside the heat exchanger or the second heat exchanger and supplying cooling air to the first and second heat exchangers; and a cooling fan for the first heat exchanger and the second heat exchanger. A pair of guide members provided between the left and right sides, a dust capturing net provided between the respective guide members so as to be able to be taken in and out in the vertical direction, and a dust collecting net for removing dust attached to the heat exchanger. A heat exchanger for a construction machine, comprising a brush provided on a lower end side of a dust capturing net.