JP4327547B2 - Liquid cooling device - Google Patents

Description

  The present invention relates to a liquid cooling device such as a radiator or an oil cooler installed in an industrial vehicle such as a wheel loader or a forklift.

  2. Description of the Related Art Conventionally, there are industrial vehicles such as wheel loaders and forklifts that travel by rotating wheels and load and transport earth and sand or luggage on a loading device. In this type of industrial vehicle, wheels are driven by engine power, and a loading device is driven by hydraulic pressure of a hydraulic device. Also, this type of industrial vehicle includes a liquid cooling device such as a radiator that cools the cooling water of the engine and an oil cooler that cools the hydraulic fluid of the hydraulic device.

  The liquid cooling system cools engine coolant and hydraulic oil by exchanging heat with air. Cooling in which a large number of flow pipes through which engine coolant and hydraulic oil flow are arranged at a fine pitch A core and a cooling fan for discharging and circulating the air around the fluid pipe of the cooling core to the outside of the engine room are provided. The cooling core is covered with a shroud, and the shroud has a ventilation fan opening facing the cooling fan on the side where the cooling fan is disposed, and a grid-like opening for ventilation on the opposite side of the cooling core from the cooling fan. Has a grill that is. The shroud is provided for concentrating the air flow from the cooling fan on the cooling core and for dust-proofing the cooling core.

  By the way, in such a liquid cooling device, since the flow pipes of the cooling core are arranged at a fine pitch, dust such as dust and dead leaf clogged between the flow pipes when used continuously, Cooling efficiency will decrease. For this reason, the liquid cooling device needs to regularly clean the cooling core. The conventional liquid cooling apparatus is configured such that the shroud and the grill can be opened and closed by an opening / closing hinge, and the cooling core is cleaned by opening the shroud and the grill.

  The present invention also relates to a cooling device in which a radiator for cooling engine cooling water and an intercooler for cooling supercharged air of the engine are arranged in parallel, so that the mutually facing surfaces of the intercooler and the radiator can be cleaned. In addition, an intercooler that is swingably supported with respect to a radiator is known (for example, see Patent Document 1). In the cooling device described in Patent Document 1, the shroud that covers the space between the cooling core and the cooling fan is not openable, and the cooling core is cleaned by blowing compressed air onto the cooling core.

In addition, regarding the dust discharge structure of the tractor, a partition plate having an opening is arranged at the front lower part of the dust screen on the front of the radiator, and a shielding plate for opening and closing the opening of the partition plate is provided, and the opening of the partition plate is moved by moving the shielding plate. It is known that the dust that has dropped onto the front lower part of the dust net is dropped and discharged to the outside of the bonnet by opening (see, for example, Patent Document 2). In the dust discharge structure described in Patent Document 2, the radiator is not covered with the shroud.
JP 2002-264665 A JP-A-7-228160

  However, the above-described conventional liquid cooling apparatus is expensive because the shroud and the grill can be opened and closed by the opening and closing hinges. Further, in the apparatus described in Patent Document 1, since compressed air is blown onto the cooling core for cleaning, there is no need to open the shroud during cleaning, but dust that has been blown off from the cooling core by the compressed air and dropped into the shroud is shroud. Cannot be discharged out of the shroud because it is not openable. Further, in the structure described in Patent Document 2, since the radiator is not covered with the shroud, the air flow by the fan is dispersed in the peripheral region other than the radiator, and the cooling efficiency is lowered, and the compressed air is blown. If you clean it, dust will be scattered around.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a liquid cooling device capable of cleaning a cooling core and discharging dust outside the shroud without opening a shroud or a grill.

In order to achieve the above-mentioned object, the invention according to claim 1 is provided with a cooling core in which a large number of flowing liquid pipes are arranged at a fine pitch, and the liquid flowing through the flowing liquid pipe is separated from the air around the flowing liquid pipe. In a liquid cooling device that cools by heat exchange, a cooling fan that circulates air around a liquid flow pipe arranged in parallel with the cooling core, and a shroud that covers the cooling core and has a fan opening facing the cooling fan, the shroud, There is a sealing plate for preventing dust scattering that has a cleaning hole for discharging dust in the shroud at the bottom between the cooling fan and the cooling core, and seals the fan opening from the inside of the shroud when cleaning the shroud. A sealing plate insertion hole for insertion into the shroud is provided at the top.

In this configuration, since there is a cleaning hole for discharging dust at the bottom of the shroud, the dust falling from the cooling core is discharged out of the shroud through the cleaning hole at the bottom of the shroud. Accordingly, the clogging of the cooling core can be cleaned and the dust can be discharged out of the shroud without opening the shroud. In addition, the dust is most likely to clog the surface of the cooling core that faces the cooling fan, and the dust that has clogged the cooling core is most likely to fall between the cooling fan and the cooling core. Is located at the bottom between the cooling fan and the cooling core, the dust clogged in the cooling core can be efficiently discharged out of the shroud. Furthermore, corrugated board etc. can be inserted in a shroud from the sealing board insertion hole, and a fan opening can be sealed from the inside of a shroud. Therefore, dust is not blown out of the shroud from the fan opening by inserting cardboard or the like into the shroud and sealing the fan opening during cleaning.

According to the invention of claim 1, since the shroud covering the cooling core has a cleaning hole for discharging dust at the bottom, for example, by blowing compressed air from the outside of the shroud to the cooling core, the cooling core is not opened. The clogging can be cleaned and the dust can be discharged out of the shroud, so that the cleaning operation can be performed efficiently. Moreover, since the cleaning hole is provided at the bottom between the cooling fan and the cooling core, the dust clogged in the cooling core can be effectively discharged out of the shroud, and the cleaning operation can be performed more efficiently. it can. Moreover, since dust can be discharged out of the shroud without opening the shroud, a structure for discharging dust out of the shroud can be realized at low cost. Furthermore, since it has a sealing plate insertion hole for inserting a sealing plate for preventing dust scattering into the shroud, for example, when cleaning the cooling core by blowing compressed air, insert cardboard or the like into the shroud to open the fan Since the dust is sealed, dust can be prevented from scattering from the fan opening to the outside of the shroud, and the cleaning operation can be performed more efficiently. Further, since the sealing plate insertion hole is provided in the upper part of the shroud, it is possible to easily insert and remove cardboard and the like. Further, it is possible to clean from the sealing plate insertion hole with compressed air, a brush or the like.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments of the invention will be described with reference to the drawings. In FIG. 1, a wheel loader 1 is an industrial vehicle that travels by rotation of wheels 2 and loads and transports earth and sand in a bucket 3 that is a loading device. The wheel 2 is driven to rotate by the power of an engine (not shown). The bucket 3 is connected to a boom 4 that can rotate up and down and a cylinder 5 that can extend and retract, and the boom 4 and the cylinder 5 operate by being driven by hydraulic pressure of a hydraulic device (not shown). ing. The bucket 3 moves up and down as the boom 4 rotates up and down, and tilts as the cylinder 5 expands and contracts. The traveling of the wheel loader 1 and the operation of the bucket 3 are controlled by various operations in the cockpit 6. Further, the wheel loader 1 is provided with a liquid cooling device 10 in the cooling chamber 7 at the rear of the vehicle body for cooling the engine coolant and the hydraulic fluid of the hydraulic device.

  Next, the liquid cooling device 10 will be described with reference to FIGS. The liquid cooling device 10 includes a radiator 11, an oil cooler 12, a cooling fan 13, a shroud 14, and a support body 15.

  The radiator 11 cools engine cooling water and includes a cooling core 21 for engine cooling water. The cooling core 21 has a structure in which a large number of flowing water pipes (flowing liquid pipes) 22 through which engine cooling water flows are arranged at fine pitches, and heat radiating fins 23 are provided in contact with the respective flowing water pipes 22. 15 is attached. The heat dissipating fins 23 have a wave shape, so that the air flows through the wave-shaped gaps (that is, the gaps between the water pipes 22). Further, the radiator 11 has a water supply port 24 at the upper part of the cooling core 21 and a drainage port 25 at the lower part of the cooling core 21. The cooling water of the engine is supplied from the water supply port 24 and is divided into each flow pipe 22, and after flowing through each flow pipe 22, joins and drains from the drain port 25. The water supply port 24 and the drainage port 25 are respectively connected with flowing water pipes (not shown) that circulate engine cooling water between the engine and the radiator 11.

  The oil cooler 12 cools the hydraulic oil of the hydraulic device, and includes a cooling core 31 for the hydraulic oil. The cooling core 31 has a structure in which a large number of fluid pipes (fluid pipes) 32 through which hydraulic fluid of the hydraulic device flows are arranged at a fine pitch, and is adjacent to the front surface of the cooling core 21 for engine coolant. 15 is attached. The respective oil flow pipes 32 are arranged with a slight gap therebetween, and air flows through the gaps between the respective oil flow pipes 32. The oil cooler 12 has an oil supply pipe 33 connected to one side of the cooling core 31 and an oil drain pipe 34 connected to the other side. The hydraulic fluid of the hydraulic apparatus is supplied from the oil supply pipe 33 and is divided into each flow oil pipe 32, and after flowing through each flow oil pipe 32, joins and drains from the oil discharge pipe 34.

  The cooling fan 13 circulates air through the cooling core 21 of the radiator 11 and the cooling core 31 of the oil cooler 12, and is installed so as to be aligned with the cooling core 21 and the cooling core 31. The cooling fan 13 generates an air flow from the engine side toward the cooling core 21 and the cooling core 31.

  The shroud 14 covers and stores the cooling core 21 of the radiator 11 and the cooling core 31 of the oil cooler 12, and includes a front shroud 41 and a rear shroud 42. The front shroud 41 covers the front surfaces of the cooling core 21 and the cooling core 31, and has a fan opening 43 for ventilation that the cooling fan 13 faces. The back surface shroud 42 covers the back surface of the cooling core 21 and has a grill 44 that is a lattice-like opening for ventilation. That is, the shroud 14 is configured to have the fan opening 43 on the side where the cooling fan 13 is disposed with the cooling core 21 and the cooling core 31 in between, and the grill 44 on the opposite side to the cooling fan 13. The front shroud 41 and the back shroud 42 are each attached to the support 15. The front shroud 41 is provided with an air permeable fan guard 45 that covers the cooling fan 13 and the fan opening 43.

  The front shroud 41 has a cleaning hole 51 and a blocking plate insertion hole 52. The cleaning hole 51 is for discharging dust 95 such as dust and dead leaf dust taken into the shroud 14 from the fan opening 43, and is provided at the bottom of the front shroud 41. The cleaning hole 51 is located between the cooling fan 13 and the cooling core 31 (also between the cooling fan 13 and the cooling core 21). At the bottom of the front shroud 41, a lid 61 that closes the cleaning hole 51 can be removed by a screw 71, and the cleaning hole 51 can be opened and closed by removing the lid 61.

  The sealing plate insertion hole 52 is for inserting a sealing plate for preventing dust scattering into the shroud 41 when cleaning the cooling core 21 and the cooling core 31, and is provided in the upper portion of the front shroud 41. At the upper part of the front shroud 41, a lid 62 that closes the sealing plate insertion hole 52 can be detached by a screw 72, and the sealing plate insertion hole 52 can be opened and closed by removing the lid 62.

  The liquid cooling apparatus 10 having such a configuration generates an air flow toward the cooling core 31 and the cooling core 21 by driving the cooling fan 13. As a result, air flows into the shroud 14 through the fan guard 45 and the fan opening 43, and the air flows between the oil flow pipes 32 of the cooling core 31 and between the water flow pipes 22 of the cooling core 21. After that, it is discharged from the grill 44. The hydraulic fluid flowing through each flow oil pipe 32 of the cooling core 31 is cooled by heat exchange with the air around each flow oil pipe 32, and the engine coolant flowing through each flow pipe 22 of the cooling core 21 is The cooling is performed by heat exchange with the air around each of the water flow pipes 22.

  The liquid cooling device 10 is preferably used with the cleaning hole 51 and the sealing plate insertion hole 52 closed during normal use other than during cleaning. During normal use other than during cleaning, the cleaning hole 51 is closed, so that air is efficiently circulated to the cooling core 21 and the cooling core 31, and the engine coolant and hydraulic oil are efficiently cooled. The dust 95 taken into the shroud 14 from the opening 43 does not fall out of the shroud 14, and the dust 95 is prevented from scattering.

  Next, a method for cleaning the liquid cooling apparatus 10 will be described with reference to FIG. For cleaning the liquid cooling device 10, first, the sealing plate insertion hole 52 is opened, and a dust scattering prevention sealing plate (for example, cardboard or the like) 80 is inserted from the sealing plate insertion hole 52, and the fan opening 43 is opened by the sealing plate 80. Seal from inside shroud 14.

  Next, with the cleaning hole 51 closed, the compressed air 91 is blown from the outside of the shroud 14 to the cooling core 21 through the grille 44 using, for example, the air nozzle 90. Thereby, the dust 95 taken into the shroud 14 from the fan opening 43 and clogged in the cooling core 21 and the cooling core 31 is blown off by the compressed air 91 and falls into the shroud 14. At this time, since the fan opening 43 is blocked from the inside of the shroud 14 by the blocking plate 80, the dust 95 blown off by the compressed air 91 does not blow out of the shroud 14 from the fan opening 43, and the dust 95 is shroud. 14 is not scattered outside.

  When the blowing of the compressed air 91 is finished, the cleaning hole 51 is opened, and the dust 95 that has fallen into the shroud 14 and accumulated is discharged out of the shroud 14 from the cleaning hole 51. By opening the cleaning hole 51 after the spraying of the compressed air 91 is completed, the dust 95 blown off by the compressed air 91 can be collectively discharged to the outside of the shroud 14. The cleaning hole 51 may be opened when the compressed air 91 is blown. In this case, a container or the like for receiving the dust 95 may be disposed below the cleaning hole 51 so that the dust 95 discharged from the cleaning hole 51 is not scattered.

  As described above, according to the liquid cooling device 10 having the above-described configuration, the cleaning hole 51 for discharging the dust 95 is provided at the bottom of the shroud 14, so that the compressed air 91 is blown onto the cooling core 21 from the outside of the shroud 14. The dust 95 clogged in the cooling core 21 and the cooling core 31 can be discharged out of the shroud 14 from the cleaning hole 51 without opening the shroud 14 or the grill 44.

  Further, in the liquid cooling device 10 having the above-described configuration, since air flows through the cooling fan 13 toward the cooling core 31 and the cooling core 21, the surface of the cooling core 21 and the cooling core 31 that faces the cooling fan 13. The dust 95 is most easily clogged, and the dust 95 clogged in the cooling core 21 and the cooling core 31 is between the cooling fan 13 and the cooling core 31 (also between the cooling fan 13 and the cooling core 21). ) Is most likely to fall. According to the liquid cooling device 10 having the above configuration, the cleaning hole 51 is provided between the cooling fan 13 and the cooling core 31, so that the dust 95 clogged in the cooling core 21 and the cooling core 31 is effectively removed. It can be discharged out of the shroud 14.

  In addition, this invention is not restricted to the structure of the said embodiment, A various deformation | transformation is possible. For example, in the above embodiment, the cleaning hole 51 and the sealing plate insertion hole 52 do not necessarily need to be closed during normal use other than during cleaning, and the lid 61 that closes the cleaning hole 51 and the lid 62 that closes the sealing plate insertion hole 52 are: It is not always necessary. Further, the sealing plate 80 for preventing dust scattering is not necessarily used, and the sealing plate insertion hole 52 is not necessarily required. Further, the cleaning hole 51 is not limited to the front shroud 41 but may be provided at the bottom of the back shroud 42. It is also possible to clean from the sealing plate insertion hole 52 with compressed air, a brush or the like.

  The liquid cooling device 10 is not limited to cooling both the engine cooling water and the hydraulic fluid, but only cools the engine cooling water or only the hydraulic fluid. There may be. Furthermore, the liquid cooling device 10 can be applied to devices other than industrial vehicles, and is not limited to those that cool engine cooling water or hydraulic fluid of hydraulic devices, but can be applied to devices that cool various liquids.

The side view which shows schematic structure of the wheel loader which concerns on one Embodiment of this invention. (A) is the partially broken front view which shows the structure of the liquid cooling device of the wheel loader, (b) is the sectional drawing. Sectional drawing explaining the cleaning method of the liquid cooling device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wheel loader 2 Wheel 3 Bucket 7 Cooling chamber 10 Liquid cooling device 11 Radiator 12 Oil cooler 13 Cooling fan 14 Shroud 15 Support body 21 Cooling core for engine cooling water 22 Flowing water pipe (flowing liquid pipe)
23 Radiation fin 31 Cooling core for hydraulic oil 32 Flowing oil pipe (flowing liquid pipe)
41 Front shroud 42 Rear shroud 43 Fan opening 44 Grill 45 Fan guard 51 Cleaning hole 52 Sealing plate insertion hole 61, 62 Lid 80 Sealing plate for dust scattering prevention 91 Compressed air 95 Dust

Claims (1)

In a liquid cooling apparatus comprising a cooling core in which a large number of flowing liquid pipes are arranged at a fine pitch, and cooling the liquid flowing in the flowing liquid pipe by heat exchange with air around the flowing liquid pipe,
A cooling fan that circulates air around the fluid pipe arranged in parallel with the cooling core;
A shroud that covers the cooling core and has a fan opening facing the cooling fan,
The shroud has a cleaning hole for discharging dust in the shroud in a bottom portion between the cooling fan and the cooling core, and dust that seals the fan opening from the inside of the shroud when cleaning the shroud. A liquid cooling apparatus having a sealing plate insertion hole for inserting a sealing plate for preventing scattering into the shroud.

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