JPH0442496Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a liquid-cooled cooling device for a forced-air engine that blows cooling air upward through a radiator such as an oil cooler, radiator, or condenser. When the engine is mounted on a work machine, the direction of the cooling exhaust air passing upward through the radiator can be easily switched between front, rear, left, right, and other sides depending on the working environment. To provide something that can smoothly eliminate the thermal influence of cooling exhaust air on workers.

<Prior Art> The basic structure of a liquid cooling system for a forced air engine, which is the subject of the present invention, is as shown in FIG.
and a fan case 5, and an engine liquid cooling radiator 1 is arranged above the fan case 5, and the radiator 1 includes a plurality of heat radiating flat cylinders 14 arranged in parallel in the front and rear direction.
The left and right ends of the fan are connected to each other by a pair of communication pipe portions 15, and the cooling air generated by the centrifugal fan 2 is guided upward by the fan case 5 and blown upward into the radiator 1. It is in a configured format.

As shown in FIG. 4, in this type of prior art, a ventilation hole 50 is provided above the fan case 5, and the oil cooler 1 is placed directly in front of the ventilation hole 50. Cooling air is blown to the engine E, and the cooling exhaust air that has undergone heat exchange is
There are things that are discharged outside.

<Problems to be solved by the invention> In the above conventional technology, when installing the engine E in a working machine such as an agricultural machine or a construction machine, a guide plate or the like is used to prevent the worker from getting burned by the heat of the cooling exhaust air. Although the structure is such that the direction of the wind is fixed at a constant level so as to be directed away from the worker, depending on the external environment such as the direction of the wind, there is a risk that the cooling exhaust air will blow onto the worker.

The technical problem of the present invention is to enable the direction of cooling exhaust air to be directed away from the operator depending on the external environment even when an engine is mounted on a working machine.

<Means for Solving the Problems> Means for solving the above problems will be described below using drawings corresponding to embodiments.

That is, the present invention provides a liquid-cooled cooling system for a forced air engine having the above-mentioned basic structure, in which an exhaust air deflection cover 7 is provided at least above the radiator 1.
A ventilation opening 8 is formed on either side of the ventilation deflection cover 7, a pair of support arms 10 are extended from both left and right sides of the cover 7, and each support leg 10 has an elastic A receiving portion 12 is formed, each elastic receiving portion 12 is removably engaged with the communication pipe portion 15 of the radiator 1, and the exhaust air direction is changed by engaging and disengaging the exhaust air direction cover 7 and changing the direction from front to back. This is characterized in that the opposite cover 7 is supported by the radiator 1 so as to be switchable between forward and reverse air exhaust positions A and B.

<Function> When the direction of cooling exhaust air changes depending on the external environment,
By performing an operation of engaging and disengaging the exhaust air direction cover 7 with respect to the communication pipe portion 15 and an operation of changing the direction back and forth, the direction of the air exhaust port 8 can be freely changed to avoid the operator.

In this case, since the tip of the support leg 10 of the exhaust air deflection cover 7 serves as an elastic receiving part 12, simply by pressing the support leg 10 against the communication pipe portion 15 of the radiator 1, the cover 7 can be easily connected to and disconnected from the heat sink 1.

<Effects of the invention> (1) When the direction of the cooling exhaust air changes depending on the external environment, the direction of the cooling exhaust opening can be freely changed to avoid the operator by switching the exhaust air direction cover between forward and reverse directions. Since it can be changed, it is possible to smoothly eliminate the risk of burns to workers.

(2) By fixing the exhaust air deflection cover to the existing communication pipe section of the radiator, the structure for engaging and disengaging the cover can be simplified, and the elastic receiving part formed at the tip of the support leg of the cover allows the cover to be engaged easily. The removal operation is also easy.

<Example> Hereinafter, an example of the present invention will be described based on the drawings.

Fig. 1 is a vertical left side view of a partially oil-cooled, forced air-cooled sub-combustion chamber type overhead valve diesel engine, Fig. 2 is a front view of the oil cooler, and Fig. 3 is a plan view of the oil cooler of the same diesel engine. An oil cooler 1 is arranged above the front space of E, and the inlet pipe 1a and outlet pipe 1b of the oil cooler 1 are connected to the cylinder head 6, and the oil is flowed around the auxiliary combustion chamber for partial oil cooling. Next, the oil cooler 1 is configured to cool the oil.

Further, a fan case 5 is attached to the lower side of the front space of the diesel engine E, a centrifugal fan 2 is fixed to the crankshaft 4 that protrudes outside the front wall of the crankcase 3 of the engine E, and the centrifugal fan 2 is fixed to the crankshaft 4 that protrudes outside the front wall of the crankcase 3 of the engine E. Accommodates fan 2.

A ventilation port 11 is opened above the fan case 5, and the oil cooler 1 is faced to the ventilation port 11;
The cooling air generated by centrifugal fan 2 is transferred to fan case 5.
It is configured so that it is guided rearward and sprayed onto the cylinder 23 and the cylinder head 6, and guided upward so that it sprays onto the oil cooler 1 from below through the ventilation port 11.

The oil cooler 1 is constructed by connecting the left and right ends of a plurality of heat dissipating flat cylinders 14 arranged in parallel in the front-rear direction with a pair of communicating pipe sections 15, and the inlet is connected to the inlet from one of the communicating pipe sections 15. The pipe 1a and the outlet pipe 1b are led out from the other end, respectively.

Further, the heat dissipation flat tubes 14 arranged in parallel,
A wavy core 17 is interposed in the gap 16 between the oil coolers 14 to increase the heat dissipation effect of the oil cooler 1.

An exhaust air direction changing cover 7 is removably disposed above the oil cooler 1, and is configured to change the direction of the cooling exhaust air after cooling the oil cooler 1.

The exhaust air direction cover 7 is composed of a rectangular support frame 18 and an air exhaust guide 20.
An air exhaust guide 21 is attached to the upper part of the support frame 18, and the left and right side parts 18a of the support frame 18,
It is constructed by extending two support legs 10 from the lower part of the support leg 18b.

As shown in FIG. 2, at the tip of the support leg 10, a substantially arcuate elastic receiving portion 12 is formed, and is elastically fitted into the cylindrical communication pipe portion 15 of the oil cooler 1 with ease. Ru.

Further, as shown in FIG. 1, the exhaust guide 21 has a triangular shape when viewed from the left side, the front part and both left and right sides of the guide 21 are closed, and the exhaust port 8 is opened at the rear of the guide 21. be done.

Therefore, the function of the exhaust air direction changing cover 7 will be described.

(1) By elastically fitting the elastic receiving portion 12 of the support leg 10 into the communication pipe portion 15 of the oil cooler 1,
When the exhaust air deflection cover 7 is placed on the oil cooler 1 in the forward air exhaust position A with the air exhaust port 8 facing the head cover 22 of the engine E, the cooling air generated by the centrifugal fan 2 is directed to the fan case 5. It is guided to cool the cylinder 23 of the engine E, and also cools the oil cooler 1 through the ventilation port 11.
After cooling the support frame 18 of the exhaust air deflection cover 7
The air passes through the air outlet 8 and is discharged toward the head cover 22.

(2) When installing the engine E on a worker, the cooling exhaust air from the oil cooler 1 may be blown toward the worker depending on the external environment, and it is necessary to prevent the cooling exhaust air from being directed toward the worker. be.

Therefore, as shown by the imaginary lines in FIG.
The exhaust air direction changing cover 7 is replaced with respect to the oil cooler 1 to the opposite direction air exhaust position B facing in the opposite direction of the air exhaust direction cover 7.

In this case, the exhaust air deflection cover 7 can be replaced by using the elasticity of the elastic receiving part 12 to replace the connecting pipe part 1.
5, so it can be done quickly and easily.

However, the left and right sides 18a and 18b of the support frame 18
In addition, support legs 10 are attached to the front and rear sides 18c and 18d, and the exhaust direction cover 7 is transformed into a structure that can be replaced in the front and back directions on the oil cooler 1. It can be directed either to the left or right, allowing you to choose the direction of the air to be ejected from front to back or left or right.

In addition, in the present invention, since the air exhaust port 8 is formed on either the front or rear or left or right side of the exhaust air direction changing cover 7, the direction of the cooling air can be changed to the front or rear direction by switching the cover 7 itself between forward and reverse directions. Alternatively, it will be redirected either to the left or to the right.

In addition, since the engine E to which the present invention is applied is of a type in which at least a portion of the cylinder 23 and the cylinder head 6 is liquid-cooled, it is possible to use a type in which both the cylinder 23 and the cylinder head 6 are completely liquid-cooled, or only the cylinder head 6 is liquid-cooled. This includes a type in which the entire cylinder head 6 is liquid-cooled, and a type in which a part of the cylinder head 6 (the liquid-cooled part is not limited to the auxiliary combustion chamber as in the above embodiment) is liquid-cooled.

The cooling liquid may be any suitable refrigerant such as water, oil, or ethylene glycol.

Furthermore, the present invention is applicable not only to the pre-chamber type diesel engine as in the embodiment, but also to a direct injection type diesel engine or an electroplated type engine.

Moreover, since the present invention can be applied to the liquid cooling radiator 1 of the engine E, the oil cooler 1 can be placed not only in the above embodiment where it is placed in the upper part of the fan case 5, but also in the front or upper part of the engine E. It can also be applied to radiators, condensers, etc.

[Brief explanation of the drawing]

Figures 1 to 3 show embodiments of the present invention;
The figure is a vertical left side view of a partially oil-cooled, forced air-cooled sub-combustion chamber type overhead valve diesel engine, Figure 2 is a front view of the oil cooler, and Figure 3 is a plan view of the oil cooler.
FIG. 4 is a vertical right side view of a partially oil-cooled forced air-cooled diesel engine showing the prior art. 1... Engine fluid cooling radiator, 2... Centrifugal fan, 3... Crank case, 4... Rotating shaft, 5
...Fan case, 7...Exhaust air direction cover, 8...
...Exhaust port, 10...Support leg, 12...Elastic receiving part, 14...Flat heat dissipation tube, 15...Communication pipe portion, A...Forward air exhaustion position, B...Reverse direction air exhaustion position, E ……engine.

Claims (1)

[Claim for Utility Model Registration] A centrifugal fan 2 and a fan case 5 are arranged in the front space of the engine E, a radiator 1 for engine liquid cooling is arranged above the fan case 5, and the radiator 1 is arranged in the front-rear direction. The left and right ends of a plurality of heat dissipating flat tubes 14 arranged in parallel are connected to each other by a pair of communication tube sections 15, and the cooling air generated by the centrifugal fan 2 is guided upward by the fan case 5 to dissipate heat. In a liquid-cooled cooling system for a forced-air engine configured to blow air upward into the radiator 1, an exhaust air deflection cover 7 is provided at least above the radiator 1.
A ventilation opening 8 is formed on either side of the ventilation deflection cover 7, a pair of support arms 10 are extended from both left and right sides of the cover 7, and each support leg 10 has an elastic A receiving portion 12 is formed, each elastic receiving portion 12 is removably engaged with the communication pipe portion 15 of the radiator 1, and the exhaust air direction is changed by engaging and disengaging the exhaust air direction cover 7 and changing the direction from front to back. A liquid-cooled cooling device for a forced air engine, characterized in that a facing cover 7 is supported by a radiator 1 so as to be switchable between a forward air exhaust position A and a reverse air exhaust position B.