JP2005220844A - Cooling device for engine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling device for an engine which can achieve the cooling of the heated engine efficiently at low cost with an extremely simple configuration, and can prolong the life of the engine. <P>SOLUTION: The cooling device 1 for the engine is provided with a means of air blasting 29, a blast duct 31, and a wind direction adjusting plate 33. The means of air blasting supplies cooling wind A to the heated engine 5, and the blast duct discharges the cooling wind A, which is supplied from the means of air blasting 29, to the outside without circulating the cooling wind within a device case 11 after guiding the cooling wind to the heated parts 23, 25, 37 of the engine 5. Then the wind direction adjusting plate arranged near the heated parts 23, 25, 37 of the engine 5 increases an active area of the cooling wind A on the heated parts 23, 25, 37 of the engine 5. Furthermore, the wind direction adjusting plate 33 is so arranged that it turns the cooling wind A to the front surface sides of the heated parts 23, 25, 37 of the engine 5. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an engine cooling device that can achieve efficient and inexpensive cooling of a heated engine in various mechanical devices including the engine with a very simple configuration.

The engine is composed of a cylinder head located at the upper part and a cylinder block located at the lower part. The cylinder head forms part of the combustion chamber together with the cylinder block. Therefore, the cylinder head is heated to a high temperature as the engine is driven. Therefore, a bowl-shaped unevenness called a cooling fin is formed on the outer peripheral surface of the cylinder head so as to increase the heat radiation area and enhance the cooling effect.
In addition, in order to further improve the cooling efficiency of the heated cylinder head, there is an engine provided with a blower fan that forcibly supplies cooling air to the engine.

FIG. 6 is a plan view showing the flow of cooling air in the apparatus housing of the engine provided with the blower fan.
As shown in the figure, the air taken in from the outside by the blower fan 101 is supplied to the engine 103 as cooling air A, but not all of it is used for cooling the engine 103. . Further, the cooling air A supplied to the engine 103 flows along the left and right side surfaces of the cylinder head 105 in the engine 103, and cannot be said to sufficiently contribute to the cooling of the cylinder head 105.

  The present invention has been made in light of the background art and the problems of the background art. Cooling of a heated engine can be achieved efficiently and inexpensively with an extremely simple configuration. It is an object of the present invention to provide an engine cooling device that can extend the service life.

  In order to solve the above-mentioned problem, the invention according to claim 1 is directed to a blower for supplying cooling air to a heated engine, and the cooling air supplied from the blower is guided to a heating unit of the engine, and An air duct that is discharged outside without being circulated and a wind direction adjusting plate that is provided in the vicinity of the heating portion of the engine and that increases an action area of the cooling air with respect to the heating portion of the engine. It is a cooling device.

  According to a second aspect of the present invention, in the engine cooling apparatus according to the first aspect, the engine heating portion is a cooling fin provided on the outer peripheral surface of the cylinder head.

  According to a third aspect of the present invention, in the engine cooling device according to the second aspect, the air flow path of the cooling air formed by the air duct is a direction along the cooling fins on the left and right side surfaces of the cylinder head facing each other. The engine cooling device is configured to allow cooling air to flow therethrough.

  According to a fourth aspect of the present invention, in the engine cooling device according to the third aspect, the cooling air flowing along the side surface of the cylinder head is guided by the air direction adjusting plate so that the air direction is directed to the front side of the cylinder head. The engine cooling device is characterized by being adjusted.

According to the engine cooling device of the present invention, the cooling air generated by the air blowing means due to the presence of the air duct is efficiently guided to the heating portion of the engine. Further, since the cooling air is discharged outside without circulating in the apparatus casing, the temperature of the cooling air does not increase.
In addition, the presence of the wind direction adjusting plate allows the cooling air to be sent to every corner of the heating part of the engine, and the cooling of the engine can be achieved efficiently and inexpensively with an extremely simple configuration, thereby extending the life of the engine. .

The best mode for carrying out the engine cooling apparatus of the present invention will be described below with reference to the illustrated embodiments.
FIG. 1 is a perspective view showing a high-pressure washing apparatus to which the engine cooling apparatus according to the present invention is applied, and FIG. 2 is a plan view showing the high-pressure washing apparatus to which the engine cooling apparatus according to the present invention is applied. FIG. 3 is an exploded perspective view showing the positional relationship between the wind direction adjusting plate and the engine, and FIG. 4 is an enlarged front view showing the wind direction adjusting plate. FIG. 5 is a side view of the wind direction adjusting plate.

In this embodiment, the high pressure cleaning apparatus 3 shown in FIGS. 1 and 2 is applied, and the cooling apparatus 1 according to the present invention is mounted on the engine 5 mounted on the high pressure cleaning apparatus 3. This high-pressure washing device 3 is used for pretreatment when coating a wall surface or the like.
The high-pressure washing device 3 has a box 11 as a device housing formed by attaching a panel 9 to a frame 7 in which metal frame members are assembled in a rectangular housing shape, and forming a square box.

A handle 13 in which a round pipe is bent into a wide gate shape is provided on the front and rear upper surfaces of the frame 7 in the box 11.
A wheel 15 is provided below the box 11 and can travel in the front-rear direction. In this specification, there is provided a pressure gauge 16 or the like that is provided with a muffler 27, which will be described later, and a pressure gauge 16 or the like that touches the front surface on the right side in FIG. The surface on the left side is the left side surface, and the surface facing the left side surface is the right side surface.
Further, on one surface of the panel 9, there are provided a joint portion 19 and the like for connecting devices such as a pressure gauge 16, a spray nozzle (not shown), and a hose 17 extending from a supply source of cleaning water.

As shown in FIG. 2, the box 11 is provided with an engine 5 to be cooled, a pump 21 driven by the engine 5, and the cooling device 1 according to the present invention.
A cylinder head 25 as a heating part of the engine 5 is provided in a posture inclined above the cylinder block 23. A square box muffler 27 is connected to the exhaust port of the engine 5.

  The cooling device 1 of the present invention includes a blower fan 29 serving as a blowing means for supplying cooling air A to a heated engine 5, and a blower duct for guiding air taken in from the outside by the blower fan 29 to the cylinder head 25 as cooling air A. 31 and a wind direction adjusting plate 33 provided in the vicinity of the front side of the cylinder head 25.

The blower fan 29 is provided on the rear surface side of the engine 5, and takes in air from the outside of the box 11 by rotating the fan using the rotation of the drive shaft of the engine 5.
The blower duct 31 uses a cover member of the blower fan 29 on the left and right side surfaces of the supply side duct 35 that guides the air taken in from the outside to the rear side of the cylinder head 25 as the cooling air A and the cooling fins 37 of the cylinder head 25. A cooling duct A that flows along the cooling air A is provided to the outside of the box 11 without being circulated.
The discharge side duct 39 is a rectangular tube-like member disposed so as to wrap the muffler 27.

The air direction adjusting plate 33 is a member that increases the working area of the cooling air A with respect to the cylinder head 25, and is provided using an attachment frame 41 provided on the front side of the cylinder head 25.
The mounting frame 41 is fixed to the cylinder block 23 and the cylinder head 25 of the engine 5 with bolts and nuts using the mounting bracket 43.
As shown in FIGS. 4 and 5, the wind direction adjusting plate 33 is formed by bending a metal flat plate into a U-shape, welded to the mounting frame 41, and integrated with the mounting frame 41.

  Further, the wind direction adjusting plate 33 is provided in the vicinity of the outlet of the cooling air A that flows along the left and right side surfaces of the cooling fin 37, and is arranged so that the cooling air A wraps around the front surface side of the cooling fin 37. Since the mounting bracket 43 is also provided so as to go around from the side surface of the cooling fin 37 to the front surface, it also has a function as the wind direction adjusting plate 33.

Next, the flow of the cooling air A in the high-pressure washing device 3 equipped with such a cooling device 1 will be described with reference to FIG.
When the engine 5 is driven, the blower fan 29 also starts rotating at the same time. As the blower fan 29 rotates, the air outside the box 11 is taken into the box 11 as cooling air A. The cooling air A taken into the box 11 is moved upward in FIG. 2 by the supply side duct 35 and guided to the rear surface of the cylinder head 25.

The cooling air A guided to the rear surface of the cylinder head 25 is guided by the cooling fins 37, wraps around the rear surface from the rear surface of the cooling fins 37, and flows forward. The cooling air A flowing along the side surface of the cooling fin 37 contacts the air direction adjusting plate 33 and the mounting bracket 43, and is guided by the air direction adjusting plate 33 and the mounting bracket 43 to reach the front side of the cooling fin 37. Then, the cooling air A reaching the front side of the cooling fin 37 is guided to the discharge side duct 39 and discharged outside the box 11 without circulating in the box 11.
Therefore, the cooling air A efficiently contacts the cooling fins 37, and a high cooling effect for the engine 5 can be obtained. That is, the cooling air A is efficiently brought into contact with the cooling fins 37 to increase the cooling effect of the cylinder head 25 which is the first heat source, thereby suppressing the temperature rise of the oil in the cylinder block 23, thereby reducing the cylinder block 23. It becomes possible to increase the cooling effect of the entire engine including it. This cooling effect can be confirmed by measuring the temperature of the oil.

As mentioned above, although the best form for implementing this invention and its specific Example were explained in full detail, a concrete structure is not restricted to these forms and Examples, and does not deviate from the summary of this invention. Any change in design within the scope is included in the present invention. For example, the mechanical device to which the cooling device 1 of the present invention is applied is not limited to the high-pressure washing device 3 and can be applied to various mechanical devices having the engine 5.
A plurality of wind direction adjusting plates 33 may be provided. For example, a wind direction adjusting plate 33 is newly provided to guide the cooling air A that reaches the cylinder head 25 through the upper surface of the cylinder head 25 or the lower surface of the cylinder block 23 to the front side of the cylinder head 25. It is also possible.

It is a perspective view which shows the high-pressure washing apparatus which is the application object of the cooling device which concerns on this invention. It is a top view which shows the high-pressure washing apparatus to which the cooling device which concerns on this invention is applied. It is a disassembled perspective view which shows the positional relationship of a wind direction adjustment board and an engine. It is a front view which expands and shows a wind direction adjustment board. It is a side view which expands and shows a wind direction adjustment board. It is a top view which shows the flow of the conventional cooling air in the apparatus housing | casing of the engine provided with the ventilation fan.

Explanation of symbols

1 Cooling device for engine 3 High pressure washing device 5 Engine 7 Frame 9 Panel 11 Box (device housing)
13 Handle 15 Wheel 17 Hose 19 Joint part 21 Pump 23 Cylinder block (heating part)
25 Cylinder head (heating unit) 27 Muffler 29 Blower fan (blower unit) 31 Blower duct 33 Air direction adjusting plate 35 Supply side duct 37 Cooling fin (heating unit) 39 Discharge side duct 41 Mounting frame 43 Mounting bracket A Cooling air

Claims (4)

  A blower for supplying cooling air to the heated engine, a blower duct for guiding the cooling air supplied from the blower to the heating unit of the engine, and then discharging the air to the outside without being circulated in the apparatus housing, and heating of the engine And a wind direction adjusting plate that is provided in the vicinity of the unit and increases an action area of the cooling air with respect to the heating part of the engine.   2. The engine cooling device according to claim 1, wherein the heating portion of the engine is a cooling fin provided on an outer peripheral surface of the cylinder head.   The cooling device for an engine according to claim 2, wherein the air flow path of the cooling air formed by the air duct is set so that the cooling air flows in a direction along the cooling fins on the left and right side surfaces of the cylinder head facing each other. An engine cooling system characterized by that.   4. The engine cooling apparatus according to claim 3, wherein the wind direction is adjusted so that the cooling air flowing along the side surface of the cylinder head is guided by a wind direction adjusting plate and goes around the front side of the cylinder head. Engine cooling system.

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