JPH05187791A - Structure for mounting radiator for vehicle - Google Patents

Abstract

PURPOSE:To improve heat exchanging performance by improving ventilation and wind generation force of a radiator for a cab over type vehicle. CONSTITUTION:A structure for mounting a radiator for a cab over type vehicle has a radiator core 4 so disposed under a foot-placing floor 3 that its front side is inclined. A diagonal flow fan 5 is provided oppositely on the back surface of the core 4, and an air duct 6 in which its one end opening is coupled to an outer periphery of the back surface of the core 4 is inclined at its rear side, and opened at the other end at the front surface side of the engine.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiator of a cab-over type vehicle which is widely used for trucks and the like, which improves ventilation, improves heat exchange performance, and makes the radiator compact.

[0002]

2. Description of the Related Art A radiator of a cab-over type vehicle such as a truck is mounted as shown in FIG. That is, the engine 2 is provided facing the lower surface of the seat portion of the cab floor 7, and the radiator core 4 and the axial fan 9 are arranged in the space between the engine 2 and the rising wall surface of the footrest floor portion 3 of the cab floor 7. The axial fan 9 was connected to the rotary shaft of the engine 2 via a belt or the like.

[0003]

In such a cab-over type vehicle, since the mounting space for the radiator core 4 and the axial flow fan 9 is extremely narrow and there are many obstacles in the air flow passage, ventilation of the radiator core 4 is caused. There was a drawback that the heat exchange performance was deteriorated due to poor performance.

[0004]

Therefore, as a result of various experiments, the present inventor has found that in a cab-over type vehicle, an optimum heat exchange performance can be obtained by devising the mounting position of the radiator core 4 and the like. The present invention has been devised based on this. That is, a radiator mounting structure for a cabover type vehicle in which an engine 2 is provided under a seat 1 of a vehicle, and a footrest floor portion 3 is formed which is adjacent to the seat 1 and the engine 2 and is recessed forward. In, the radiator core 4 is disposed below the footrest floor 3 while being inclined forward. Along with that, the radiator core 4
An air duct 6 whose one end is connected to the outer periphery of the back side is tilted backward and the other end is opened so as to face the front side of the engine 2. Further, the mixed flow fan 5 is installed in the air duct 6. This mixed flow fan 5 is characterized in that the outer periphery of the boss portion at the center thereof forms a truncated circular surface, and mainly causes a radial air flow to be obliquely rearward by the rotation of the blades.

[0005]

In FIG. 1, since the radiator core 4 is tilted forward and is disposed below the footrest floor portion 3, its front surface faces a relatively large space, and the radiator core 4 is slanted by the wind force of the mixed flow fan 5. A radial air flow is circulated rearward, and the air flow is positively guided along the outer periphery of the engine 2. As a result, the ventilation of the radiator core 4 is significantly improved, and as a result, the heat exchange performance is improved.

[0006]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is an explanatory view of a vehicle radiator mounting structure of the present invention, FIG. 3 is a front view of a mixed flow fan 5 used in the structure, and FIG. 4 is a schematic longitudinal sectional view of the same. The vehicle of this embodiment constitutes a cab floor 7 in which a supporting surface for supporting the driver's seat 1 and a footrest floor portion 3 in front thereof are formed stepwise via a side wall portion 10. The engine 2 is arranged below the seat 1, and the front surface of the engine 2 and the side wall portion 10 are arranged close to each other. This engine 2
Is supported by a chassis 11 below the vehicle.

Next, the radiator core 4 is supported by a mounting frame connected to the chassis 11, and is arranged below the footrest floor portion 3 inclining forward. This radiator core 4 has, for example, a large number of flat tubes and corrugated fins interposed between the flat tubes, and both ends of each tube are connected to a pair of tanks. Radiator core 4
Is formed in a plane rectangular shape, and the rectangular hole of the air duct 6 is attached to the outer peripheral surface on the back side thereof. The air duct 6 has a radiator core 4 side formed in a rectangular shape and a mixed flow fan 5 side described later formed in a circular shape. Then, the circular side faces the front surface of the engine 2 and opens. And
A mixed flow fan 5 is attached to a crankshaft of the engine 2 or a rotating shaft 8 connected to the crankshaft via a belt, and the mixed flow fan 5 is arranged in the opening of the other end of the air duct 6. A clutch is usually provided between the rotary shaft 8 and the mixed flow fan 5. As shown in FIGS. 3 and 4, the mixed flow fan 5 has a large number of blades 13 radially integrally formed on the outer periphery of the truncated vertical surface. The mixed flow fan 5 is made of a synthetic resin molded body, and the rotation of the mixed flow fan 5 causes an electromotive force to flow an air flow obliquely rearward from the front surface side to the rear surface side and in the radial direction.

In this embodiment, the diameter of the boss portion 12 is equal to that of the blade 13.
The length is larger than the length of the engine 2 and the air flow is positively guided in the outer peripheral direction of the engine 2. In addition, cooling water inflow and outflow pipes (not shown) are projected from the tanks arranged at the upper and lower ends of the radiator core 4, and are supported at appropriate positions such as the lower surface of the footrest floor portion 3 or the chassis 11 and the pipes and the engine. The second cooling water flow passage is connected by a flexible hose. According to the experiments conducted by the present inventor, it has become clear that the performances of the conventional radiator shown in FIG. 2 and the radiator of the present invention shown in FIG. 1 are as follows. That is, when the conditions are the same except for the mounting structure, the mounting structure of the present invention has a heat dissipation performance improved by 30% as compared with the conventional structure. Further, as a result of an experiment by the tuft method, it was confirmed that ventilation was improved for the radiator. Further, since the suction effect of the fan is improved along with the improvement of the ventilation system, it is possible to reduce the fan rotation speed. Therefore, it is confirmed that the ventilation system noise is effectively reduced. The ventilation resistance of the radiator core 4 was reduced to 1/3 or less, and the heat dissipation of the entire engine room was also significantly improved.

[0009]

As described above, according to the present invention, in a cabover type vehicle radiator mounting structure, a radiator core 4 is arranged below the footrest floor portion 3 inclining forward, and an air duct 6 is provided behind the radiator core 4. Since the oblique flow fan 5 is installed in the air duct 6 that is inclined, the air flow flowing through the radiator core 4 can be smoothly guided to the rear obliquely upward in the narrow engine room, and the heat exchange can be performed. Can improve performance. Since the radiator core 4 is arranged so as to lean forward toward the lower side of the footrest floor 3 so as to be able to face a relatively wide space, air can be smoothly introduced from the front side of the radiator core 4. . Moreover, since the airflow that has passed through the core is guided obliquely upward and rearward by the inclined air duct and is blown toward the radial direction obliquely rearward by the mixed flow fan 5, the air duct 6 faces the front side of the engine. Even so, the airflow can smoothly pass through the outer periphery of the engine.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a radiator mounting structure of the present invention.

FIG. 2 is an explanatory view of a mounting structure for a conventional radiator.

FIG. 3 is a front view of a mixed flow fan 5 used in the mounting structure of the present invention.

FIG. 4 is a schematic vertical sectional view of the mixed flow fan 5.

[Explanation of symbols]

 1 seat 2 engine 3 foot rest floor 4 radiator core 5 mixed flow fan 6 air duct 7 cab floor 8 rotating shaft 9 axial fan 10 side wall 11 chassis 12 boss 13 wing

Claims (1)

[Claims] 1. An engine (2) is provided below a seat (1) of a vehicle, and a footrest floor (3) is formed which is adjacent to the seat (1) and the engine (2) and is recessed forward. In a cabover type vehicle radiator mounting structure as described above, a radiator core (4) is disposed below the footrest floor (3) in a forwardly inclined manner, and at the outer periphery of the rear surface of the radiator core (4). The air duct (6) having one end connected to the opening is tilted backward, and the other end is opened so as to face the front side of the engine (2), and the air duct (6) is internally provided with a mixed flow fan (5). A radiator for a vehicle, characterized in that the outer periphery of the boss portion at the center of the flow fan (5) forms a frustoconical surface and the airflow is mainly radiated diagonally rearward due to the rotation of the blades. Construction.