JP2002105983A - Cooling device of construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling device for a construction machine so that at least some of a plurality of heat exchangers for the cooling devices are parallelly arranged and the cooling pipes supplying or discharging a cooling medium for the respective heat exchangers parallelly arranged to each other are disposed in the same side with the parallelly arranged heat exchangers so that the pipes for the cooling medium can be easily arranged. SOLUTION: Some cooling devices R constituted of a plurality of heat exchangers loaded on a construction machine P are parallelly arranged, and the inlet pipes 16i, 18i and the outlet pipes 16o, 18o of the parallelly arranged heat exchanger R1 are disposed at the same side. When the residual other cooling devices RN than the one side cooling device R1 parallelly arranged are installed, they are arranged so as to be superposed with the cooling devices R1 in series, and further, the cooling medium pipes 34, 36 for supplying and removing the cooling medium of the other cooling device RN are constituted compact by constituting at least a part of the cooling medium pipes 34, 36 installed so as to straddle the outer periphery of the side of the other cooling device R1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a miniature hydraulic excavator, for example, in which the demand for miniaturized hydraulic excavators and miniature hydraulic excavators is increasing in order to save energy and work in narrow places. When the shovel and the above-mentioned compacting are used, the space for disposing a plurality of cooling devices for cooling the engine, the intercooler, the working oil, etc. mounted on the above-mentioned construction machine is reduced. The space for performing the cleaning by rotating a part of the cooling device is reduced, and the space for the refrigerant piping of the cooling device is hardly taken. Therefore, the cooling device and the refrigerant piping can be easily arranged. The present invention relates to a cooling device for a construction machine.

[0002]

2. Description of the Related Art Construction machines include, for example, dams, tunnels,
2. Description of the Related Art There is a hydraulic excavator that excavates earth and sand for roads, water supply and sewerage, and dismantles buildings. The hydraulic excavator includes a lower traveling body, an upper revolving body pivotally supported on the lower traveling body, and a working device provided in front of the upper revolving body.

[0003] A cab for an operator room of a working machine is provided in the upper revolving superstructure, but a mini-hydraulic excavator has no cab but only a seat for an operator to sit on. Further, an engine, a hydraulic pump, a cooling device, a battery, a control valve, a fuel tank, a hydraulic oil tank, and the like are provided on a frame of the upper swing body.

The construction machine performs operations such as traveling by the lower traveling structure, turning by the upper revolving structure, and excavation by the working device. The above operation is performed by a hydraulic actuator composed of a hydraulic motor and a hydraulic cylinder. Done. Also, as shown in FIG. 11, the hydraulic pressure is supplied to the actuator by the hydraulic pump 05 operated by the engine 03.

Devices such as an engine 03, a radiator 06, a hydraulic pump 05, and a direction switching valve for switching the direction of the hydraulic oil supplied from the hydraulic pump 05 are provided in the upper revolving unit. Further, an engine 03 is provided in the engine room 02, and a radiator 06 for cooling the engine 03 and an oil cooler 010 for cooling hydraulic oil are provided.

The above intercooler 08 and oil cooler 0
10, a radiator 06 and a condenser 012 are cooling devices R for cooling intake air, cooling water, and hydraulic oil of the engine. The cooling air flows through these cooling devices R, and a cooling medium of the cooling device R is provided. A cooling fan 014 driven by an engine 03 that cools the air is provided. The cover 01 constituting the engine room 02 is provided with an outside air inlet 01a for introducing outside air and the cooling device R introduced as described above from the inside of the engine room 02.
The air heated to a high temperature after cooling the muffler and the like is cooled by a cooling fan 01.
4 is provided with a discharge port 01b for discharging to the outside.

[0007] Cooling air is introduced from the outside air inlet 01a of the cover 01 constituting the engine room 02,
An air flow is generated in the engine room 02 as shown by an arrow to cool the engine 02 and the muffler, etc.
b. Also, the oil cooler 0 shown in FIG.
10, and the radiator 06 in the order of FIG.
As shown in (A), (B) and (C), they are arranged so as to be superposed in series.

The high-temperature oil, which has been operated as described above, is sent to an oil cooler 010 from a control valve (not shown) provided at the center of the vehicle body.
The low-temperature oil cooled at 0 is returned to the hydraulic oil tank.
Therefore, since the radiator 06 is located behind the oil cooler 010, the refrigerant pipe of the oil cooler 010 is arranged as shown in FIG.
As shown in (A) to (C), the heat exchanger R (oil cooler 01)
0, a radiator 06), and a dead space (dead space) D on the side and forward of the heat exchanger R.
S1 and DS2 occur, and the above space is not effectively utilized.

When the intercooler 08 is provided as shown by a two-dot chain line in FIG. 11, the flow of the cooling air to the cooling device R provided in the engine room 02 is, for example, on the upstream side. , A condenser 012, an intercooler 08, an oil cooler 010, and a radiator 06 flow in this order. The intercooler 08 cools the air compressed by the supercharger 016 for supercharging the intake air to the engine 03. For this reason, a filter device 017 is provided outside the engine room 02. Thus, intrusion of dust and the like is prevented.

The supercharger 016 rotates the turbine with the energy of the exhaust gas of the engine 03 to compress the intake air. The temperature of the supercharger 016 rises due to this compression. Need to be cooled before feeding to. And intercooler 08
Is provided for cooling the intake air, and is generally cooled to about 40 to 70 ° C. at room temperature in many cases.

A cooling medium (refrigerant) for the intercooler 08
Must be cooled to a temperature lower than that of the other heat exchangers, and the amount of heat radiated by the oil cooler 010 and the radiator 06 is relatively large.
As shown in FIG. 1, FIG. 13 and FIG. 14, it is generally disposed on the most upstream side of the air flow or on the upstream side of the radiator 06.
Further, since the supercharger 016 has to be arranged at the part of the engine 03 as shown in FIG. 11, the supercharger 016 is connected between the supercharger 016 and the intercooler 08 and between the intercooler 08 and the engine 03. Between them, pipes 018 and 019 for flowing compressed air are connected.

As described above, when the cooling device R is superimposed and piped, as shown in FIGS. 11, 13 and 14, the refrigerant pipes 018 and 019 of the intercooler 08 are connected to the oil cooler 010 by the intercooler 08. , Radiator 0
6 in the case of this embodiment, FIG.
As shown in FIG. 3, the upper side (the above-mentioned side) or FIG.
As shown in (1), the pipe is straddled over the vicinity of the left and right side surfaces (the side portions).
9 (usually a circular pipe of diameter D is applied)
As shown in FIG. 11, FIG. 13, and FIG. 14, the refrigerant pipes 018, 019 are passed through in the width direction near the side surfaces on the left and right sides or in the height direction near the upper side surface by the area of. Doubles the storage space (dead space) for storage
1 or DS3.

Further, the arrangement of the refrigerant pipe of the conventional cooling device will be described in detail. As shown in FIGS. 11 and 14, the width of each of the widths in the vehicle width direction increases. Further, as shown in FIG. 14, when the distance L between the cab 008 and the counterweight 0010 is given, if the pipe of the intercooler is disposed on the side of the radiator 06 and the oil cooler 010, the length of the dead space DS2 La
(Total length of 2La on the left and right).

Also, as shown in FIG.
In the case where the refrigerant pipes 018 and 019 of FIG. 8 are disposed near the upper side (side face) of the radiator 06 or the oil cooler 010, the pipes 018 and 01 of the intercooler 08 are provided.
The engine hood is raised by the dead space DS3 by the diameter D of 9, and the rear visibility and the appearance (appearance) are reduced.

[0015] Further, for the above-described reason, the cooling device R including a plurality of heat exchangers is used, for example, for the condenser 01.
2. In order to increase the cooling efficiency, the intercooler 08, the oil cooler 010, and the radiator 06 are arranged so as to be as close to each other as possible in order to increase the cooling efficiency. Condenser 01
2. Dust and the like adhere to the intercooler 08, the oil cooler 010, and the radiator 06.

In particular, the adherence to the radiator 06 on the downstream side is remarkable, and if such dust adheres, the above operation cannot be continued unless cleaning is performed relatively frequently.
If the intercooler 08 and the oil cooler 010 or the radiator 06 overlap, cleaning cannot be performed. Therefore, for example, when the oil cooler 010 or the oil cooler 010 is disposed as shown in FIG.
After the radiator 06 is cleaned, an operation of returning the radiator 06 to its original position and mounting the radiator 06 is performed.

This is because the diameter D of the pipes 018 and 019 for sucking and discharging air of the intercooler 08 is the same as that of the plurality of heat exchangers R.
Since the diameter of the refrigerant pipe of the other heat exchanger is larger than that of the other heat exchangers, the intercooler 08 is fixedly disposed on the upper revolving superstructure when generally disposed as described above. Therefore, the intercooler 08 hinders movement of the oil cooler 010 due to temporary rotation.

In the conventional construction machine shown in FIG. 11, the cooling device R, the engine 03, and the hydraulic pump 05 are disposed in the engine room 02 via a core having a large cooling air flow passage area of the cooling device R. Since the cooling air passage is disposed in the cooling air passage which is openly communicated, the noise of the engine 03 and the cooling fan 014 may be transmitted to the outside from the large area and may cause the noise. If the rotation speed of the cooling fan is increased to increase the wind speed in order to prevent dust from adhering, the noise of the cooling fan increases.

[0019]

However, FIG.
When the oil cooler 010 and the radiator 06 are arranged in series as shown in FIG.
As shown in (C), dead spaces DS1 and DS2 are generated on the sides and the front of the heat exchanger R. Since the dead space DS2 has a refrigerant pipe 018, a tool box can be installed and used effectively. Cab 008 and heat exchanger R
The dead space DS1 between (the oil cooler 010 and the radiator 06) is generated, and the capacity cannot be effectively utilized such as increasing the capacity of the heat exchanger R for improving the cooling capacity.

When the refrigerant pipes 018, 019 of the intercooler 018 are disposed above the radiator 06 or the oil cooler 010 as shown in FIG. 13, only the diameter D of the refrigerant pipes 018, 019 of the intercooler 08 is obtained. Dead space DS3 occurs and the engine hood gets higher,
Rear visibility and appearance (appearance) decrease. In addition, as shown in FIG. 14, when the refrigerant pipe is disposed on the side of the radiator 06 or the oil cooler 010, the refrigerant pipe 0 of the intercooler 08 is provided.
The length La of the dead space DS1 is equal to the diameter D of 18,019 (the length of the left and right sides is 2La), and the length in the front-rear direction of the construction is increased to increase the size.

In the conventional construction machine described above, if the cooling device R is neglected, the cooling air circulation of the cooling device R is reduced due to clogging of the fins of the cooling device. Not only can the severe work of the construction machine not be performed, but also the work of pulling out and installing the radiator 06 or the oil cooler 010 for cleaning the radiator 06 oil cooler 010 requires man-hours and time, resulting in reduced work efficiency, Further, there is a possibility that the noise of the construction machine is increased as described above.

The present invention has been made in view of such a problem, and one of cooling devices including a plurality of heat exchangers mounted on a construction machine is arranged in parallel, and In the case where the inlet pipe and the outlet pipe of each of the arranged heat exchangers are arranged on the same side, and the other cooling apparatus other than the cooling apparatus arranged in parallel is provided, Provided so as to be superposed in series with one of the cooling devices provided in such a manner that a refrigerant pipe for supplying and discharging the cooling medium of the one cooling device extends across the outer periphery of a side portion of the other cooling device. Provided, at least a part of the refrigerant pipe straddling the disposition portion is formed in a flat shape, or a concave portion is provided in the disposition portion, and at least one of the components is configured to be compact, Of the above cooling device Sweep can be easily, and to provide a cooling system of a small construction machine noisy.

[0023]

According to a first aspect of the present invention, there is provided a cooling device for a construction machine according to the present invention, wherein the cooling device includes a cooling device including an engine and a plurality of heat exchangers. At least one of the plurality of heat exchangers of the cooling device is arranged in parallel, and refrigerant pipes for supplying and discharging the cooling medium of the heat exchangers arranged in parallel are arranged in parallel. The heat exchanger is provided on the same side of the heat exchanger.

According to a second aspect of the present invention, there is provided a cooling device for a construction machine according to the first aspect, wherein the plurality of heat exchangers are arranged in series with the pair of heat exchangers arranged in parallel. The remaining heat exchangers of the heat exchangers are arranged, and the refrigerant pipes for supplying and discharging the cooling refrigerant of the set of heat exchangers arranged in parallel are arranged in parallel with each other. Disposed on the same side of the set of heat exchangers provided, and the refrigerant pipe of the other heat exchanger is arranged so as to straddle the side of the set of heat exchangers disposed in parallel. At least one part of the refrigerant pipe of the other heat exchanger and the flat part formed in a flat shape at least a part of the refrigerant pipe of the other heat exchanger passing through the mounting part is provided. At least one of the recessed portions provided in the above-mentioned arrangement portion so that the portion is immersed. It is characterized in that it is configured as has been.

According to a third aspect of the present invention, there is provided a cooling device for a construction machine according to the first or second aspect, wherein an outside air inlet and an exhaust port are formed, and the plurality of the plurality of cooling machines are located closer to the outside air inlet than an engine is installed. A cooling device comprising a heat exchanger, and a cooling device for a construction machine provided in an engine room in which a cooling fan is disposed between the engine and the heat exchanger. An example refrigerant pipe from the intercooler is disposed near the side of one of the heat exchangers in the cooling device located downstream of the intercooler, and is arranged on the outside air inlet side of the plurality of heat exchangers. An arrangement portion arranged from the upstream to the downstream of the heat exchanger is provided, and a part of the refrigerant pipe passing through the arrangement portion is provided in a flat shape with the flat portion and the installation portion. On It is characterized in that at least one of a concave portion provided so that at least a part of the refrigerant pipe is immersed therein is provided.

According to a fourth aspect of the present invention, there is provided a cooling device for a construction machine according to any one of the second to third aspects, wherein each of the refrigerant pipes is divided at the installation portion. Is formed of the flat tube having a flat shape, and the flat tube is formed by fitting each of the flat tubes at the ends of the divided refrigerant pipes.

According to a fifth aspect of the present invention, there is provided a cooling device for a construction machine according to the second or third aspect, wherein the two ends of the divided refrigerant pipes are fitted to the respective flat tubes at the ends thereof. It has a flat tube joint for connecting flat tubes. According to a sixth aspect of the present invention, in the cooling device for a construction machine according to the fourth or fifth aspect, one end is fitted to an end of each of the divided cylindrical refrigerant pipes. The part has a deformed joint formed in the flat tube shape.

According to a seventh aspect of the present invention, there is provided a cooling device for a construction machine according to the fifth or sixth aspect, wherein one end is fitted into an opening at an end of the divided refrigerant pipe. The present invention is characterized by including the above-mentioned deformed joint configured to have a flat-shaped opening whose end is fitted to the flat pipe joint. The cooling device for a construction machine according to the present invention described in claim 8 is the cooling device for a construction machine according to any one of claims 2, 3, and 8, wherein the flat portion or the flat tube is connected to any of the plurality of heat exchangers. And at least one of the upper revolving structure of the construction machine and the upper revolving structure of the construction machine, is detachably attached via detachable attachment means.

According to a ninth aspect of the present invention, there is provided a cooling device for a construction machine according to any one of the second, third, and seventh aspects, wherein the engine room in which the engine is disposed and the plurality of engine rooms are provided. The cooling device disposed in the engine room so that any one of the heat exchangers is superposed in series, and provided between a side outer periphery of the cooling device and a partition constituting the engine room. The partition member to be provided and the flat tube of the refrigerant pipe of the cooling device penetrate the partition member and are attached to the disposing portion by detachable means.

According to a tenth aspect of the present invention, in the cooling device for a construction machine according to the ninth aspect, the partition member is made of a foamed polyurethane fixed to a partition such as a cover of the engine room. It is characterized by. According to an eleventh aspect of the present invention, there is provided a cooling device for a construction machine according to any one of the second to third aspects, wherein one of the cooling devices including the plurality of heat exchangers is used. The cooling device is characterized in that the cooling device is disposed with a gap capable of cleaning between the cooling devices arranged in parallel and the remaining cooling devices of the plurality of cooling devices.

According to a twelfth aspect of the present invention, there is provided a cooling device for a construction machine according to the eleventh aspect, further comprising a gap filling cover which is at least substantially closed around the gap or the gap filling cover which can be opened and closed or detachable. It is characterized by that. A cooling device for a construction machine according to a thirteenth aspect of the present invention is the construction device according to the eleventh or twelfth aspect, wherein: A gap D with the remaining cooling devices among the cooling devices including the plurality of heat exchangers arranged so as to be superposed on the cooling devices arranged in parallel.
However, the ratio of the height H of the upstream cooling device of the superposed cooling devices to the gap D is D / H = 0.05 to 0.3.
It is characterized by being set to.

According to a fourteenth aspect of the present invention, in the cooling device for a construction machine according to the thirteenth aspect, the gap D is set to about 30 to 300 mm, and preferably the gap D is set to about 30 to 300 mm.
Is set to about 40 to 100 mm. The cooling device for a construction machine according to the present invention according to claim 15 is a cooling device according to claims 2 and 3.
In the configuration according to any one of claims 4 and 8, an intercooler of the cooling device is rotatably disposed via a hinge mechanism, and after removing a refrigerant pipe of the intercooler, the intercooler is rotated. It is characterized in that the cooling device can be moved to clean the cooling device.

[0033]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment in which a cooling device for a construction machine according to the present invention is applied to a hydraulic shovel, and FIG. 1 is a schematic side view showing a side of the hydraulic shovel, and FIG.
FIG. 3 is a schematic explanatory view showing the cooling device shown in FIG. 3, and FIG. 3 is a schematic explanatory view showing the cooling device shown in FIG. 2A is a schematic explanatory view showing an enlarged perspective view of an oil cooler and a radiator arranged in parallel, FIG. 4B is a schematic explanatory view showing a front view of FIG. 4A, and FIG. 4 is a schematic enlarged plan view showing portions of a cab, a hydraulic oil tank, a cooling device, and a counterweight. FIG. 5 is a schematic explanatory view showing a perspective view taken along arrow 5A in FIG. 4A, and FIG. 6 shows an application example of FIG. (A) is a schematic explanatory view showing a case where a radiator and an oil cooler are arranged in parallel and an intercooler is arranged with a gap, and (B) is a schematic explanatory view showing another mounting structure of a gap filling cover. Figure,
(C) is a schematic explanatory view showing a structure in which the gap filling cover is disposed above and below the intercooler, and (D) shows a mounting structure in a case where the gap filling cover is detachably disposed on the outer periphery of the intercooler. FIG. 7 is an enlarged detailed view of the cooling device of FIG. 6A, FIG. 7A is a schematic explanatory diagram showing a perspective view of the cooling device R, and FIG. 7B is an exploded view of the flat tube. FIG. 7 (C) is a schematic explanatory view showing an arrangement part shown in FIG. 7 (A), FIG. 8 is a schematic explanatory view showing an arrangement space of piping of the intercooler of FIG. 7 (A), and FIG. FIG. 7A is a schematic explanatory view showing a modified example of FIG. 7A, and FIG. 10 is a schematic explanatory view showing an arrangement space of a refrigerant pipe of the intercooler of FIG.

As shown in FIG. 1, a construction machine, for example, a hydraulic excavator P includes an upper revolving unit 2 and a lower traveling unit 4.
And a working device 6. The upper revolving unit 2 is provided with a cab 8 for an operator room at a front end of the construction machine P, a counterweight 10 at a rear end thereof, and a frame on the upper revolving unit 2. 2, Figure 3
As shown in the figure, the counterweight 10 of the excavator P
An engine room 12 is provided on the front side of the vehicle.

A cooling device R which is provided in the engine room 12 and includes a plurality of heat exchangers such as a condenser 19, an intercooler 14, and an oil cooler 16 and a radiator 18 indicated by a two-dot chain line. In this embodiment, an oil cooler 16 and a radiator 18 are provided.
There are various types of arrangement of the plurality of heat exchangers of the cooling device R. In the case of the present embodiment, as shown in FIGS. 1 and 2, the plurality of heat exchangers (cooling devices) are provided. The oil cooler 16 and the radiator 18 of the cooling device R are arranged in parallel in the front-rear direction of the excavator P.

Then, as shown in FIG.
8 and oil cooler 16 upper tank UT
And each inlet pipe 18 of the lower tank LT
i, 16i and outlet pipes 18o, 16o are arranged on the same side (engine side). And pipe 18
By providing pi, 18po, 16pi, and 16po, the piping for the hydraulic oil on the opposite side (the front side of the heat exchanger) becomes unnecessary.

That is, as shown in FIG. 4C, when the dead space DS2 disappears, a large heat exchanger can be installed in the same space, and the cooling performance can be improved. Further, when the dead space DS2 is eliminated, the space in front of the heat exchanger is widened and tools can be installed, so that convenience is improved. When a heat exchanger having the same performance is used, the dead space DS1 is eliminated, so that the distance L between the cab 8 or the hydraulic oil tank or the fuel tank and the counterweight 10 is reduced.
To reduce the body size.

The cooling devices R arranged in parallel in FIG.
An application example in which the intercooler 14 is provided in FIGS.
Will be described. On the upstream side of the oil cooler 16 and the radiator 18 as the cooling device R1, the intercooler 14 as the remaining cooling device RN of the cooling device R including the plurality of heat exchangers is disposed, and is designed with the radiator 18. An intercooler 14 is provided with an interval D determined by specifications.

Further, as shown in FIGS. 2 and 3, a cooling device R provided in the engine room 12 and a cooling fan 20 provided downstream thereof for cooling the cooling device R are provided. Further, as shown in FIG. 3, an engine 22 and a hydraulic pump 24 connected to and driven by the engine 22 are provided behind the cooling fan 20, and a partition plate DW is provided between the engine 22 and the hydraulic pump 24. Have been.

As shown in FIG. 3, there is provided a cooling device R1 disposed in the engine room 12 in parallel in the order of the oil cooler 16 and the radiator 18 of the plurality of heat exchangers. I have. As shown in FIG. 2, FIG. 3, FIG. 6, and FIG. 7, a cooling device (oil cooler 16, radiator 1) including the heat exchangers arranged in parallel is provided.
8) The outer periphery of the cooling device NR (intercooler 14) arranged in series upstream of R1 and the upper partition Wa of the cover 1 constituting the engine room 12 (also used as an engine hood in the present embodiment) , A partition member 1 provided between the front partition Wb, the rear partition Wc, and the lower partition Wd
8a and a cooling fan 20 for cooling the cooling device R are provided.

As shown in FIG. 2, FIG. 3, FIG. 6, and FIG. 7, one of the cooling devices R including the plurality of heat exchangers is arranged in parallel in the front-rear direction. Cooling device R1 (in this embodiment, radiator 18, oil cooler 1)
6) and the remaining cooling device RN of the plurality of heat exchangers
(In the present embodiment, the intercooler 14) is arranged so as to overlap, and the cooling device R provided so as to face the above-described cooling devices RN and R1 arranged so as to overlap.
In this embodiment, the cooling fan 20 for cooling N and R1 is provided.

As shown in FIG. 3, refrigerant pipes 34, 36 for passing compressed air are provided between a supercharger 32 provided in the engine 22 and the intercooler 14 and between the intercooler 14 and the engine 22. Are provided on the side of the front partition Wb and the rear partition Wc of the parting member 18a provided between the outer peripheral portion of the side portion (side surface) of the radiator 18 and the partition walls Wa to Wd constituting the engine room 12. It is arranged so as to penetrate the partition member 18a.

Since the engine room 12 of the embodiment shown in FIGS. 3 and 4 is constructed as described above, when the engine 22 and the cooling fan 20 operate, the outside air inlet 1a of the cover 1 is opened. After cooling air is introduced to cool the cooling device R, the engine 22 and the hydraulic pump 24 are cooled and discharged from the outlets 1 b and 1 c provided in the cover 1.

At this time, the radiator 18, the oil cooler 16, and the intercooler 14 are efficiently cooled by the cooling fan 20, for example, every day, especially in a work site such as demolition work of a building, and in some cases, within one day. More than once,
It is necessary to frequently clean the cooling device R. When performing the above cleaning work, the cooling device R of the above embodiment is used.
Is useful.

That is, the radiator 18 and the oil cooler 1
6, one of the plurality of cooling devices such as the intercooler 14 is arranged in parallel to one of the cooling devices R1 (the oil cooler 16 and the radiator 18) and the other one of the plurality of cooling devices R is left. The cooling device RN (intercooler 14) is connected via a hinge mechanism 44a described later to FIG.
The intercooler 14 may be opened by rotating as shown by the arrow 6A in FIG. 6A. Even if the intercooler 14 is rotatable or non-rotatable, the radiator 18 and the intercooler 14 The intercooler 14 and the radiator 18 can be easily cleaned by inserting and blowing off a nozzle of an air jet between the intercooler 1 and the intercooler 1 in the open state.
4 and the radiator 18 and the oil cooler 16 are blown off by the nozzle of the air jet, so that cleaning can be easily performed.

Further, after the above cleaning, FIG.
As shown in FIG. 3, the hinge mechanism 48 is applied to the oil cooler 16 in the present embodiment, which is a locking member provided between the oil cooler 16 and the radiator 18 by returning the oil cooler 16 to the original position. Combination bolt (or thumb screw etc.) 48a
Can be easily screwed and fastened so as to be detachably attachable.

The intercooler 14, which is another cooling device NR, and the one cooling device R1 arranged in parallel with at least one of the plurality of cooling devices R.
(In the present embodiment, the oil cooler 16 and the radiator 18)
The distance D between the first cooling device R1 and the height H of the intercooler 14 that overlaps with the one cooling device R1 and the one cooling device R1 that overlaps with the intercooler 14 are appropriately determined according to design specifications. The ratio to the gap D is D / H =
It is configured to be approximately 0.05 to 0.3.

The interval D is normally set to about 30 to 200, and the interval D is set to about 30 to 300 mm when a large model or a special model is included, and preferably about 40 to 300 mm.
It may be set to 〜100 mm. Also, a refrigerant pipe for supplying and discharging the cooling refrigerant of the intercooler is described later with reference to FIG.
As shown in (B), the flat portion PL is formed and the radiator 1
In the case of the present embodiment, for example, a mounting portion U provided on a side portion of the radiator 18 or on a fixed side portion of the upper revolving structure 2 near the side portion is provided, for example, as shown in FIG. 6 (A)
Bracket BK, bolt BK1, nut BK2 shown in
It is detachably attached to the side of the radiator 18 or the oil cooler 16 by attaching means 60 such as.

The mounting means 60 is not limited to the above. For example, as shown in FIGS. 7A and 7B, a bracket BK is attached to a modified joint 55A, 55B and a flat pipe joint 57 described later. May be integrally formed, and may be configured to be attached to the above site by the bolt Tb.
Although not shown, the mounting means 60 is provided with a radiator 18.
The same operation and effect as described above can be obtained by mounting a bracket on the bracket and attaching the flat tube 55 or the flat portion PL to the bracket by an attachment means such as a bolt or a hook via an elastic member.

Further, fastening members TA and TB formed of an elastic material at the respective fitting portions shown in FIG. 7B are provided at the respective connecting portions constituting the flat portion PL, and bolts T
b, are detachably connected by hooks or the like. Therefore, in the present embodiment, the length of the hydraulic excavator P of the cooling device R in the front-rear direction is shortened by the flat portions PL of the refrigerant pipes 34 and 36, so that the cooling device R can be disposed compactly. Next, the radiator 1 of the plurality of heat exchangers
8, the case where the oil cooler 16 is arranged in parallel in the front-rear direction of the excavator P will be described in further detail with reference to FIGS.

The intercooler 14 is provided upstream of the radiator 18 and the oil cooler 16 arranged in parallel with each other.
7 (A) and 7 (A).
The refrigerant pipes 34 and 36 of the intercooler are shown in FIG.
As shown in FIGS. 2A and 2B, the refrigerant pipes 34 and 36 of the intercooler 14 pass through the partition member 18a as shown in FIGS. At least a part of the refrigerant pipes 34, 36 through which the refrigerant pipes 34, 36 pass through an arrangement part U provided on the side of the cooling device R arranged from the downstream side to the flat part P
L, and the flat portion PL is a flat tube 55 (flat tube portion 5).
5a, 55b) to reduce the outer dimensions of the flat tube 55 to the diameter D of the substantially circular refrigerant pipes 34, 36 described above.
It is configured to be smaller than that.

The flat tube 55 shown in FIGS. 7A and 7B is disposed near the radiator 18 and the side (side surface) of the oil cooler 16, and in the present embodiment, the radiator 1
8. The radiator 18 and the oil cooler 16 are attached to the above-described arrangement portion U provided on the side of the oil cooler 16 by the mounting means 60 including the bracket BK and the bolt BK1.
It is attached to the side of.

Further, there is provided a flat pipe joint 57 which is fitted to the flat pipe sections 55a, 55b at the ends of the divided pipes and connects the flat pipe sections 55a, 55b. The two flat tube portions 55a and 55b are each formed of a cylindrical refrigerant pipe 34, one end of which is divided as described above.
The modified joints 55A and 55 are fitted into the flat end openings of the end portions 36 and the other end portions are formed in the flat tube shape.
It may be configured as 5B.

The flat part PL or the flat tube 55 is attached to at least one of the side part of the plurality of heat exchangers and at least one of the upper revolving units of the hydraulic excavator P. It is detachably attached via. Therefore, in the above embodiment, as shown in FIG. 7 (B), the refrigerant is connected to the substantially circular refrigerant pipes 34, 36 via the deformed joints 55A, 55B. Dead space DS1 to DS3
There can be reduced from the size h ₁ to h _2.

When the dead space DS1 in the width direction of the heat exchanger is reduced as shown in FIG. 8, when the space L between the cab 8 and the counterweight 10 is constant as shown in FIG. In the same space, the capacity of the heat exchanger can be increased by Ls from the length Lh, in which the diameters D (h ₁ ) of the refrigerant pipes 34, 36 are reduced, and the cooling capacity is improved. Can be.

Further, when the capacity of the heat exchanger is constant, the above L can be reduced, and the size of the vehicle body can be reduced. In the above embodiment, the intercooler 14 is provided with a desired gap so that the gap between the intercooler 14 and the intercooler 14 can be cleaned.
4 can be cleaned with an air jet while the intercooler 14 and the radiator 18 are fixed.
Alternatively, a gap between the oil cooler 16 and the oil cooler 16 is provided so as to be as small as possible, and as shown in FIGS. 7 (A) and 6 (A), via the hinge mechanism 44a attached by the bolt 44b. Like the oil cooler 16, the cleaning can be performed by rotating the intercooler 14 about the rotation axis Ya as shown by an arrow 6a.

That is, as shown in FIGS. 5, 6 (A) and 7 (A), the refrigerant pipe, for example, the deformed joint 55
A and 55B are removed so that only the intercooler 14 can be rotated about the rotation axis Ya in the 6A direction as described above.
It is not necessary to consider the occurrence of torsion of the cooling pipes 34 and 36 which occurs when the rotary shaft rotates, so that the degree of freedom at the time of design can be increased and the radiator 18 and the oil cooler 1
6, the cooling efficiency can be improved.

The case where the intercooler 14 as the other cooling device NR and the other cooling device R1 are arranged so as to be superposed has been described above. The other heat exchanger and the one cooling device R1 are not limited.
When the above-mentioned space D is provided in the case of superimposing, and when the inlet pipe and the outlet pipe of the one cooling device R1 are provided on the same side as shown in FIGS. The effect can be obtained, and a part of the refrigerant pipes 34 and 36 of the intercooler 14 is
With L, the same operation and effect as described above can be obtained.

Therefore, if the flat tube 55 is used as shown in FIG. 7A, the dead space DS1 in the width direction of the heat exchanger R1 can be reduced as shown in FIG. (1): When the arrangement space width L of the cooling device is constant, the capacity of the heat exchanger can be increased within the space width L, and the cooling capacity can be improved.

(2): When the capacity of the heat exchanger is constant,
The space width L can be reduced, and the size of the vehicle body can be reduced. In the case of the application example of FIG. 7A shown in FIG. 9, the arrangement portion PL is provided above the upper tank UT above the oil cooler 16 and the radiator 18 as described above. Intercooler 1 in the installation part PL
Provided flat tubes 55 of the refrigerant pipe 34 and 36 4 and to reduce the height direction of the dead space DS3, (1): the height of the engine, the h ₂ from h _1, as shown in FIG. 10 Thus, the visibility behind the cab 8 is improved.

(2) The appearance (appearance) of the entire vehicle body can be improved. In addition, the flat tube 55 is disposed around the oil cooler 16 and the radiator 18 (any of the upper and lower sides and the left and right sides).
5A and 55B are connected to the circular refrigerant pipes 34 and 36 via the flat pipe joint 57, so that assembly, disassembly, and maintenance thereof can be easily performed.

The flat tube 55 is constituted by a flat portion PL in which at least a part of the refrigerant pipes 34 and 36 passing through the mounting portion U is provided in a flat shape. And the refrigerant pipe 3 as shown in FIG.
A depression V is provided so that at least a part of the fourth and the fourth 36 is immersed. And, as mentioned above,
In the present embodiment, instead of the flat tube 55 shown in FIG. 7 (C), a recess V is provided in the arrangement portion U of each of the upper tanks UT of the oil cooler 16 and the radiator 18 as shown in FIG. Even if the above-described effects can be achieved, if both the flat tube 55 and the depression V are applied, the refrigerant pipe can be disposed so as to be immersed in the depression V. Further, it is possible to achieve the function and effect that can be configured more compactly.

[0063] Also, FIG. 9, when reducing the height direction of the dead space DS3 as shown in FIG. 10, (becomes h ₂ from h ₁₎ engine hood height is reduced cab 8 behind the visibility is improved As a result, the external appearance “look” of the entire vehicle body can be improved. Even when the intercooler 14 is fixedly arranged as in the embodiment of the present invention described above,
Further, even when the cooling medium is rotatably provided, a flat portion PL is provided in a part of the refrigerant pipes 34 and 36 for supplying and discharging the cooling medium of the intercooler 14, and the concave portion V is provided on the cooling device side as necessary. Is provided, the cooling device R of the excavator P can be further compactly arranged.

Whether the intercooler is fixedly disposed or rotatably provided as in the above-described embodiment of the present invention, the intercooler for supplying / discharging the cooling medium of the intercooler is provided. A flat portion PL is provided in a part of the refrigerant pipes 34, 36.
If the recess V is provided on the cooling device side as needed, the cooling device of the hydraulic excavator can be further compactly arranged.

In the embodiments, application examples, and modifications shown in FIGS. 2 to 10 described above, for example, a gap filling cover CV for closing at least substantially the periphery of the gap D shown in FIG. If the gap filling cover CV made of an elastic member is provided detachably or openably and closably along the periphery of the intercooler 14 with the thumb screw 48a or the like, the cooling efficiency is prevented from being reduced due to the leakage of the cooling air from the gap D. can do.

When the opening / closing / removable gap filling cover CV is applied, the cooling efficiency is improved, and at the time of the above cleaning, the opening / closing / removable gap filling cover CV is opened to fill the gap. For example, by inserting an air jet nozzle, dust from the cooling device can be easily cleaned. Other examples of the mounting structure of the gap filling cover CV shown in FIG.
FIG. 6D is described.

In the case shown in FIG. 6B, the intercooler 14 is attached by a bracket RS2 extending from a frame RS1 provided on the radiator 18 and the oil cooler 16. One end of the gap filling cover CV is attached to the frame RS1 via a hinge CVh so as to be openable and closable by a thumb screw 48a, and the other end is detachably attached to the intercooler 14 and the thumb screw 48a. It is arranged along the outer periphery of the intercooler 14 so as to close the gap D.

FIG. 6 (C) shows the case where the above-mentioned gap filling cover CV is provided at the upper and lower portions of the intercooler 14, and is applied when the above-mentioned gap D is small. Can be reduced. FIG.
As shown in (D), the gap filling cover CV is
The gap filling cover CV may be removably attached to the outer periphery of the intercooler 14 with the thumb screw 48a, and may be appropriately provided around the intercooler so as to open and close the gap D.

If the gap filling cover CV is provided as described in FIG. 6 and provided in the gap D, the fluid of the cooling air is prevented from leaking from the gap D and the cooling efficiency is improved. Can be.

[0070]

As described above in detail, according to the cooling device for a construction machine according to the first aspect of the present invention, a cooling device for a construction machine having an engine and a cooling device including a plurality of heat exchangers is mounted. At least one of the plurality of heat exchangers of the cooling device is arranged in parallel, and refrigerant pipes for supplying and discharging the cooling refrigerant of the heat exchangers arranged in parallel are arranged in parallel. Since the refrigerant pipes are arranged on the same side of the arranged heat exchangers, by installing the refrigerant pipes arranged in parallel on the same side, the opposite side of each of the parallel heat exchangers ( The piping for the refrigerant on the front side of the heat exchanger) can be made unnecessary, and the space in front of the heat exchanger can be widened, so that various kinds of articles can be installed, and the convenience can be improved.

Further, the distance in the width direction of the heat exchanger can be reduced, and the size of the vehicle body can be reduced.
According to the cooling device for a construction machine of the present invention described in claim 2,
2. The arrangement according to claim 1, wherein the other of the plurality of heat exchangers is arranged in series with the set of heat exchangers arranged in parallel. A refrigerant pipe for supplying and discharging the cooling refrigerant of the pair of heat exchangers disposed in parallel is disposed on the same side of the pair of heat exchangers disposed in parallel, The refrigerant pipe of the other heat exchanger is provided with an arrangement portion attached so as to straddle the side portion of the set of heat exchangers arranged in parallel, and the other of the other heat exchangers passing through the arrangement portion is provided. At least a portion of the refrigerant pipe of the heat exchanger has a flat portion formed in a flat shape and a recess provided in the disposing portion so that at least a part of the refrigerant pipe of the other heat exchanger is immersed. Since at least one of them is configured to be provided, the effect of claim 1 is added. Can arrangement space reduction of the cooling device by the flat portion or the recess diameter is reduced in the refrigerant piping of the cooling device, it is possible to constitute the construction machine compact.

According to the third aspect of the present invention, in the construction machine cooling apparatus according to the first or second aspect, an outside air inlet and an exhaust port are formed, and the outside air inlet and the exhaust port are formed closer to the outside air inlet than the engine is installed. In the cooling device for a construction machine provided in the engine room in which a cooling fan is provided between the engine and the heat exchanger, a cooling device including the plurality of heat exchangers is provided. A refrigerant pipe from the intercooler is arranged near the side of one of the heat exchangers in the cooling device located downstream of the intercooler, the refrigerant pipe being arranged on the outside air inlet side of the plurality of heat exchangers. An arrangement portion arranged from the upstream to the downstream of the heat exchanger is provided, and a part of the refrigerant pipe passing through the arrangement portion is provided in a flat shape with the flat portion and the installation portion. Since at least one of the recessed part provided so that at least a part of the refrigerant pipe is immersed is provided, in addition to the effect of claim 1 or 2, the refrigerant pipe is introduced from the outside air inlet. Since the cooling device and the engine room are cooled by the cooled air and discharged from the discharge port, the cooling efficiency is improved, and the operating noise of the engine and the like can be reduced.

According to the cooling device for a construction machine of the present invention described in claim 4, in the configuration of claim 2 or 3, the end of each of the refrigerant pipes divided at the location of the disposing portion is provided. The flat portion is formed by flattening the flat tube, and the flat tube is formed by fitting each of the flat tubes at the ends of the divided refrigerant pipes. By attaching the flat portion of the refrigerant pipe to the disposition portion, the disposition space of the cooling device can be effectively reduced.

According to a fifth aspect of the present invention, in the construction machine cooling device according to the second or third aspect, each of the divided refrigerant pipe ends is fitted to each of the flat pipes. Since the flat tube joint for connecting the two flat tubes is provided, in addition to the effect of claim 2 or 3, the flat portion of the refrigerant pipe is detachable, and the disassembly, assembly, and maintenance thereof are easy. Can be performed.

According to a sixth aspect of the present invention, there is provided a cooling device for a construction machine according to the fourth or fifth aspect, wherein one end is provided at an end of each of the divided cylindrical refrigerant pipes. Since the fitting has the deformed joint whose other end is formed in the flat tube shape, in addition to the effect of claim 4 or 5, the flat joint is extremely easily attached and detached by the deformed join, The disassembly, assembly, and maintenance of the cooling device can be easily performed, for example, the intercooler can be easily rotated when cleaning the cooling device.

According to the cooling device for a construction machine of the present invention described in claim 7, in the structure according to claim 5 or 6, one end is fitted to the opening at the end of the divided refrigerant pipe. The other end is provided with the deformed joint configured to have a flat-shaped opening to be fitted to the flat pipe joint, so that in addition to the effect of claim 5 or 6, the piping of the intercooler is appropriately positioned. Then, the deformed joint can be easily connected, and the flat portion can be easily formed.

According to the cooling apparatus for a construction machine according to the present invention, the flat portion or the flat tube is connected to the plurality of heat exchange units. Claims 2, 3 and 8 are detachably attached to at least one of the side part of the container and at least one of the upper revolving superstructures of the construction machine through detachable attaching means.
In addition to the above effects, the flat portion of the refrigerant pipe is attached to the heat exchanger side or the upper revolving structure side, so that the movement of the refrigerant pipe with respect to the heat exchanger can be reduced.

According to the cooling device for a construction machine according to the ninth aspect of the present invention, in the configuration according to any one of the second, third, and eighth aspects, the engine room in which the engine is disposed, and The cooling device disposed in the engine room so that any one of the plurality of heat exchangers is superposed in series, between a side outer periphery of the cooling device and a partition constituting the engine room. The partition member provided and the flat tube of the refrigerant pipe of the cooling device penetrates the partition member and is attached to the disposing portion by detachable attachment means. In addition to any of the effects, the entire cooling device is configured to be compact,
The cooling fan of the cooling device can effectively improve the cooling efficiency and reduce the cost.

According to a tenth aspect of the present invention, in the construction of the ninth aspect, the partition member is made of a foamed polyurethane fixed to a partition such as a cover of the engine room. Therefore, in addition to the effect of the ninth aspect, it is possible to reduce leakage of operating noise of the engine and the like from the engine room and movement of the flat portion of the refrigerant pipe.

According to the cooling apparatus for a construction machine according to the present invention, in the construction according to any one of the second, third, and tenth aspects, the cooling apparatus comprising the plurality of heat exchangers is preferably used. The cooling device is provided with a gap capable of cleaning between the cooling device provided in parallel with any one of the cooling devices and the remaining cooling device of the plurality of cooling devices.
In addition to the effect of any one of the above cooling devices, for example, an air jet nozzle is inserted between the cooling device in which any one of the plurality of cooling devices is arranged in parallel and the remaining cooling device, and Dust can be easily cleaned.

According to the cooling device for a construction machine according to the present invention, in the structure according to the present invention, the gap filling cover which is at least substantially closed around the gap or the gap filling cover which can be opened and closed or detachable. Therefore, in addition to the effect of the eleventh aspect, it is possible to prevent the cooling efficiency from being reduced due to the leakage of the cooling air from the gap, and to provide the cooling device by the arrangement of the flat portion of the refrigerant pipe. Can be provided compactly.

When the above-mentioned gap-closing cover which can be opened or closed is applied, the cooling efficiency is improved, and at the time of the above-mentioned cleaning, the above-mentioned gap-closing cover which can be opened or removed is opened to fill the gap. For example, by inserting an air jet nozzle, dust from the cooling device can be easily cleaned. According to the cooling device for a construction machine of the present invention described in claim 13, the cooling device according to claim 11 or 12, wherein any one of the cooling devices including the plurality of heat exchangers is arranged in parallel. The gap D between the cooling device and the remaining cooling devices among the cooling devices including the plurality of heat exchangers disposed so as to be superimposed on the cooling device disposed in parallel with the cooling device arranged in parallel with the cooling device arranged in parallel The ratio of the height H of the upstream cooling device to the gap D is D / H =
Since it is set to 0.05 to 0.3, in addition to the effect of claim 11 or 12, the cooling device and the cooling fan and the size of the gap determined by the design specification are set to the size of the heat source. A part of the refrigerant pipe of the exchanger can be configured as a flat portion to be compact, and the cooling efficiency can be improved.

Further, the above-mentioned ratio increases the degree of freedom at the time of design, and can be appropriately set according to design specifications. According to the cooling apparatus for a construction machine of the present invention described in claim 14, in the configuration according to claim 13, the gap D is about 30 to 30.
0 mm, and preferably the gap D is about 40 to 1
Since it is set to 00 mm, in addition to the effect of claim 13, the cooling device desired in the design specification can be easily set by the gap D, and a part of the refrigerant pipe of the heat exchanger is used. The flat portion has an effect that the cooling device can be arranged compactly.

According to the cooling device for a construction machine of the present invention, the intercooler of the cooling device has a hinge mechanism. The cooling device is configured to be rotatably disposed through the intercooler and to remove the refrigerant pipe of the intercooler, and then to rotate the intercooler to clean the cooling device. In addition to any of the above effects, after the refrigerant pipe of the intercooler is removed, the intercooler can be easily rotated by the hinge mechanism to clean the intercooler, the radiator, and the oil cooler.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing an embodiment in which a cooling device for a construction machine according to the present invention is applied to a hydraulic shovel, showing a side surface of the hydraulic shovel.

FIG. 2 is a schematic explanatory view showing a section taken along line 2A-2A in FIG. 1;

FIG. 3 is a schematic explanatory view showing an arrow 3A in FIG. 2;

4 is a schematic explanatory view showing an enlarged perspective view of the cooling device shown in FIG. 3; FIG. 4A is a schematic explanatory view showing an enlarged perspective view of an oil cooler and an intercooler arranged in parallel;
FIG. 4B is a schematic explanatory view showing the front view of FIG.
FIG. 3 is a schematic enlarged plan view showing portions of a cab, a cooling device, and a counterweight in FIG. 2.

FIG. 5 is a schematic explanatory view showing a perspective view taken along arrow 5A in FIG. 4 (A).

6A and 6B show an application example of FIG. 4, wherein FIG. 6A is a schematic explanatory view showing a case where a radiator and an oil cooler are arranged in parallel and an intercooler is arranged with a gap, and FIG. Schematic explanatory diagram showing another mounting structure of the filling cover,
(C) is a schematic explanatory view showing a structure in which the gap filling cover is disposed above and below the intercooler, and (D) shows a mounting structure in a case where the gap filling cover is detachably disposed on the outer periphery of the intercooler. FIG.

FIG. 7 is an enlarged detailed view of the cooling device of FIG. 6A, wherein FIG. 7A is a schematic explanatory view showing a perspective view of the cooling device R, and FIG.
Is a schematic explanatory view showing an exploded view of a flat tube, and (C) is FIG.
It is a schematic explanatory drawing which shows the arrangement | positioning part shown in FIG.

FIG. 8 is a schematic explanatory view showing a space for disposing pipes of the intercooler of FIG. 7 (A).

FIG. 9 is a schematic explanatory view showing a modified example of FIG. 7 (A).

FIG. 10 is a schematic explanatory view showing an arrangement space of a refrigerant pipe of the intercooler of FIG. 9;

FIG. 11 is a schematic explanatory view showing a longitudinal section of an engine room of a conventional hydraulic shovel.

FIG. 12 is an enlarged perspective view of the cooling device of FIG. 11;
(A) is a schematic explanatory view showing a perspective view of the cooling device, (B)
12A is a schematic explanatory view showing the front of FIG. 12A, and FIG.
FIG. 2B is a schematic explanatory view showing a plan view of FIG.

FIG. 13 is a schematic explanatory view showing an enlarged perspective view of a cooling device showing another conventional example and showing a state similar to FIG. 11;

FIG. 14 is a schematic explanatory view showing a modification of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cover 1a Air inlet 1b Discharge port 2 Upper revolving unit 4 Lower traveling unit 6 Work device 10 Counter weight 12 Engine room 14 Intercooler 16 Oil cooler 18 Radiator 18a Partition member 19 Condenser 20 Cooling fan 22 Engine 24 Hydraulic pump 38 Muffler 40 Exhaust pipes 44, 44a Hinge mechanism 48 Locking member 48a Engagement bolt 55 Flat tube 55a Flat tube portion 55b Flat tube portion 55A Deformed joint 55B Deformed joint BK Bracket BK1 Bolt 57 Flat pipe joint 60 Mounting means PL Flat part R Cooling device TA , TB Fastening member U Arrangement part V Depressed part Wa-Wd Upper, front, rear, lower partition walls

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F01P 3/18 F01P 3/18 Q 11/04 11/04 C F28F 9/02 301 F28F 9/02 301E 9 / 26 9/26

Claims (15)

[Claims] 1. A cooling device for a construction machine equipped with an engine and a cooling device comprising a plurality of heat exchangers, wherein at least one of the plurality of heat exchangers of the cooling device is arranged in parallel, A refrigerant pipe for supplying and discharging the cooling refrigerant of each of the heat exchangers arranged in parallel is arranged on the same side of the heat exchangers arranged in parallel. Cooling system. 2. The method according to claim 2, further comprising: disposing another heat exchanger of the plurality of heat exchangers so as to overlap in series with the set of heat exchangers disposed in parallel. A refrigerant pipe for supplying and discharging the cooling refrigerant of each set of the heat exchangers arranged in parallel is arranged on the same side of the set of heat exchangers arranged in parallel, and The refrigerant pipe of the heat exchanger is provided with an arrangement portion attached so as to straddle the side portion of the set of heat exchangers arranged in parallel, and the other heat exchanger passing through the arrangement portion is provided. At least a part of the flat part formed in a flat shape and at least a part of the refrigerant pipe of the other heat exchanger is provided with a recess provided in the disposing part so that at least a part of the refrigerant pipe of the other heat exchanger is immersed. 2. The apparatus according to claim 1, wherein one of them is provided.
A cooling device for a construction machine having the configuration described above. 3. A cooling device comprising a plurality of heat exchangers is provided on an outside air inlet side from an installation position of an engine, wherein the cooling device is formed between the engine and the heat exchanger. In a cooling device for a construction machine provided in an engine room provided with a fan, an intercooler for intake of the engine is disposed on the outside air inlet side of the plurality of heat exchangers, and is located downstream of the intercooler. In the vicinity of the side of any one of the heat exchangers of the cooling device, there is provided an arrangement portion arranged from the upstream of the heat exchanger to the refrigerant pipe from the intercooler to the downstream, At least one of a flat portion provided in a flat shape and a recessed portion provided so that at least a portion of the refrigerant pipe is immersed in the mounting portion is provided. When 3. The cooling device for a construction machine according to claim 1, wherein one of the cooling devices is provided. 4. An end of each of the refrigerant pipes divided at the location of the disposition portion is formed by the flattened flat pipe, and each of the ends of the divided refrigerant pipes is flattened. The cooling device for a construction machine according to any one of claims 2 to 3, wherein the flat portion is formed by fitting a pipe. 5. The flat pipe joint according to claim 2, further comprising a flat pipe joint fitted to each of said flat pipes at an end of said divided refrigerant pipe and connecting said flat pipes. Cooling equipment for construction machinery. 6. A deformed joint having one end fitted to an end of each of the divided cylindrical refrigerant pipes and the other end formed in the flat tube shape. The cooling device for a construction machine according to claim 4. 7. The said refrigerant | coolant comprised so that the one end may be fitted in the opening of the edge part of the said piping for refrigerant | coolants, and the other end may have a flat opening fitted with the said flat pipe joint. The cooling device for a construction machine according to claim 5, further comprising a deformed joint. 8. The flat portion or the flat tube is connected to any one of the side portions of the plurality of heat exchangers and at least one of the upper revolving units of the construction machine via detachable mounting means. Characterized by being detachably mounted,
The cooling device for a construction machine according to any one of claims 2, 3, and 7. 9. The engine room in which the engine is disposed, the cooling device disposed in the engine room such that any one of the plurality of heat exchangers is superposed in series, A partition member provided between a side outer periphery of the cooling device and a partition constituting the engine room,
9. The cooling pipe according to claim 2, wherein the flat pipe of the refrigerant pipe of the cooling device penetrates the partition member and is attached to the disposing portion by detachable means. A cooling device for a construction machine according to claim 1. 10. The cooling device for a construction machine according to claim 9, wherein said partition member is made of polyurethane foam fixed to a partition such as a cover of said engine room. 11. A gap capable of cleaning a cooling device in which any one of the plurality of cooling devices is arranged in parallel and a cooling device remaining in the plurality of cooling devices. The cooling device for a construction machine according to any one of claims 2, 3, and 10, wherein the cooling device is provided with the following. 12. The cooling device for a construction machine according to claim 11, further comprising a gap filling cover which is at least substantially hermetically sealed around said gap or said gap filling cover which can be opened and closed or detachable. 13. A cooling device, wherein one of the cooling devices comprising a plurality of heat exchangers is disposed in parallel with the cooling device disposed in parallel with the cooling device disposed in parallel. The gap D with the rest of the cooling units consisting of the heat exchangers is such that the ratio of the height H of the upstream cooling unit of the superposed cooling units to the gap D is D / H.
13. The cooling device for a construction machine according to claim 11, wherein the setting is set to 0.05 to 0.3. 14. The cooling device for a construction machine according to claim 13, wherein the gap D is set to about 30 to 300 mm, and preferably, the gap D is set to about 40 to 100 mm. 15. An intercooler of the cooling device is rotatably disposed via a hinge mechanism. After removing a refrigerant pipe of the intercooler, the intercooler can be rotated to clean the cooling device. The cooling device for a construction machine according to any one of claims 2, 3, 4, and 8, wherein the cooling device is configured as described above.