JPS643774Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an engine cooling system, and more particularly to an engine cooling system that uses a cross flow fan (also referred to as a tangential fan; the same applies hereinafter).

Conventionally, in this type of device, the cooling water for cooling the engine is guided to a radiator and air is sent to cool the cooling water, but if the air volume is insufficient, there is a method to increase the air volume. In this case, the outer diameter of the cross flow fan installed behind the radiator is increased, the axial length of the cross flow fan is increased, and the rotation speed of the fan is increased. The following methods were used. However, the method described above requires a large installation space in the front-rear direction or left-right direction of the vehicle in a narrow space within the engine room. In reality, although there is some space in the height direction in the engine room, there is almost no space in the front-rear and left-right directions, so the above method has a problem in terms of installation space.

Next, in the case of the above-mentioned method, a cross-flow fan with a large capacity cannot be used in practice, so the fan is forced to work hard, resulting in a drawback in terms of durability.

Therefore, this invention focuses on the fact that a certain amount of space can be secured in the vertical direction (height direction) of the installation position of the cross flow fan in the engine room, and has developed a configuration in which multiple cross flow fans are installed in the vertical direction. Furthermore, by configuring the casing so that the rotation of the crossflow fan is not weakened by the flow of air passing through the radiator core due to vehicle speed, the air volume is increased.
The aim is to improve cooling efficiency and prevent engine overheating.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a simplified sectional view of the front part of an automobile showing a first embodiment of the present invention. In the figure, reference numeral 1 indicates a nose part, and an engine 2 is disposed in the rear part of the nose part 1. ing. Two cross flow fans 4 and 5 are provided in the vertical direction midway between the engine 2 and the front radiator 3. Both fans 4 and 5 have a ₁ ,
They rotate in the directions of the arrows _a2 and their rotational forces are transmitted by fan drive motors installed at portions (not shown) of the shafts 4a and 5a in the direction of the axis _O1 . (However, the driving method may be configured to be transmitted from the engine crankshaft using a mechanical joint such as a belt.)

A casing K1 consisting of a first casing 6, a second casing 7, and a side casing (not shown ₎ is installed at the upper and lower portions of the cross flow fan 4. The first casing 6 is arranged so as to extend rearward from the upper part of the radiator 3, and includes a front curved section 61, a central curved section 62, and a rear outlet section 63. A pointed end 64 protruding downward is formed at the contact point of both curved parts 61 and 62, and connects A ₁ , which is one of the quarter points of the height of the radiator 3, and the axis O ₁ of the fan 4. The pointed end portion 64 is located on the connected straight line _B1 or slightly below it.

On the other hand, the second casing 7 is arranged so as to extend rearward from the midpoint C of the height of the radiator 3, and consists of a horizontal straight portion 71 and a curved portion 72 curved toward the upper rear. The upper end of the curved portion 72 and the rear outlet portion 63 form an airflow outlet 8.

A casing K ₂ is also provided above and below the other lower cross flow fan 5 . The casing _K2 consists of a first casing 9 having the same shape as the first casing 6 described above, and a second casing 10 having the same shape as the second casing 7, and passes through the midpoint C. It has a vertically symmetrical structure with respect to the horizontal line. Note that the symbol W is the front wheel of the vehicle.

In this configuration, starting the engine 2,
In addition, when the fan drive motor (not shown) is activated (the vehicle is not yet running), the cross flow fans 4 and 5 rotate in the a ₁ and a ₂ directions, so the air in front of the radiator 3 is sucked. An air flow is generated as shown by the white arrow, the water in the radiator 3 is cooled, and the air flow is discharged from both outlets 8 and 11, respectively.

Next, when the vehicle starts running, the speed of the airflow increases relatively as shown by the white arrow, and the airflow flows _at a high speed, especially at high _speeds . is formed, and the pointed ends 64 and 94 extend to a position on or slightly beyond the straight lines B ₁ and B ₂ , so that the air flow
The fans 4 and 5 do not receive rotational moment in the direction opposite to the a ₁ and a ₂ directions, but rather act to increase their rotation in the a ₁ and a ₂ directions. Therefore, the cooling effect does not decrease.

Next, a second embodiment will be described with reference to FIG. 2 (the same components as those of the first embodiment in FIG. 1 are given the same reference numerals). The difference between the second embodiment and the previous embodiment is that the same two cross flow fans 4 and casings _K1 as in the previous embodiment are disposed one above the other. Therefore, the two upper and lower cross flow fans 4,4 rotate in the same direction, and the pointed ends 64,64 of the _first casing 6.6 on the upper side of both the fans 4,4 are the same as in the previous embodiment.
B ₁ and B ₁ are located above or slightly below.

FIG. 3 shows a third embodiment, in which the same reference numerals as in the first embodiment are used as in the previous embodiment. That is,
This third embodiment has two cross flow fans 5 in Fig. 1 arranged above and below, and the rotation direction is the same.
a There are _two directions.

Further, FIG. 4 shows a fourth embodiment, in which the same reference numerals as in the first embodiment are used as in the previous embodiment. That is, the cross-flow fan 5 in FIG. 1 is arranged above and the cross-flow fan 4 is arranged below, so that the rotation directions are opposite to each other.

The operations of the second to fourth embodiments described above are substantially the same as those of the first embodiment, so a description thereof will be omitted.

In the first to fourth embodiments described above, two cross flow fans are used, but three or more may be installed if space permits. In addition, although the casings K ₁ and K ₂ have been described as being always fixed, the fan cover portion (center curved portion 6 in Fig. 1
2) may be configured such that the covering action is canceled when the speed of the vehicle is below a certain speed. With such a configuration, it is possible to increase the amount of passing air when the vehicle is running at low speed.

In this way, the present invention includes a radiator and an engine fixed to a vehicle body, and a stacked arrangement in the vertical direction between the radiator and the engine, each axis of which is in a horizontal plane, and the direction of each axis is the same as that of the radiator and the engine. a plurality of cross-flow fans perpendicular to the direction connecting the cross-flow fans; a first casing disposed in each of the cross-flow fans and located at the top of each cross-flow fan; and a first casing located at the bottom of each cross-flow fan. one of the first casing and the second casing has a curve connecting the radiator and the cross flow fan; a central curved part that covers a part of the outer periphery of the cross-flow fan, and a rear outlet part extending from the cross-flow fan in the direction of the engine, and the end of the front curved part on the cross-flow fan side is The other of the first casing and the second casing covers a part of the outer periphery of the cross flow fan from the radiator, and has a pointed end facing away from the cross flow fan and extending in the rotational direction of the cross flow fan. Because it extends smoothly in the direction of the engine, when the vehicle starts running, especially at high speeds, the wind does not flow directly toward the surface formed by the crossflow fan, so the crossflow fan rotates. When securing air volume to increase cooling efficiency, the purpose can be achieved with simple means. Furthermore, conventional methods have disadvantages in terms of space and durability, but the present invention does not have such disadvantages and is advantageous in practice.

[Brief explanation of the drawing]

FIG. 1 is a simplified sectional view of the front part of a vehicle showing a first embodiment of the present invention, FIG. 2 is a simplified sectional view of the front part of a vehicle showing a second embodiment of the present invention, and FIG. FIG. 4 is a simplified sectional view of the front part of a vehicle showing a fourth embodiment of the present invention. 1...Automobile nose part, 2...Engine, 3
...Radiator, 4,5...Cross flow fan, _K1 , _K2 ...Casing, 6,9...First casing, 7,10...Second casing, 8,1
1...exit.

Claims (1)

[Claims for Utility Model Registration] A radiator and an engine fixed to a vehicle body, stacked vertically between the radiator and the engine, each axis of which is in a horizontal plane, and the direction of each axis is aligned with that of the radiator. a plurality of cross flow fans perpendicular to the direction connecting the engine; a first casing disposed in each of the cross flow fans and located at the top of each of the cross flow fans; and a first casing located at the bottom of each of the cross flow fans. and side casings located on both sides of each cross flow fan, and one of the first casing and the second casing has a front side casing that connects the radiator and the cross flow fan. a curved portion, a central curved portion covering a part of the outer periphery of the cross-flow fan, and a rear outlet portion extending from the cross-flow fan in the direction of the engine, the end of the front curved portion on the cross-flow fan side; is a tip extending in the rotational direction of the cross flow fan in a state facing away from the cross flow fan, and the other of the first casing and the second casing covers a part of the outer periphery of the cross flow fan from the radiator. An engine cooling device characterized in that the engine cooling device extends smoothly in the direction of the engine.