JPH0230341Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

The present invention relates to a cooling fan device used to cool a radiator mounted on a vehicle, and particularly relates to the structure of a cooling fan device of the type in which a cross-flow type cooling fan is mounted behind the radiator.

[Conventional technology]

In so-called front radiator type vehicles, where the radiator is located at the front of the vehicle body, a cooling fan device is installed in front or behind the radiator, and the rotation of this cooling fan device forces cooling air into the radiator area. The cooling water passing through the radiator is cooled by passing through the radiator. Conventionally, push-in type or suction type axial flow fans have been commonly used as such cooling fan devices, but from the perspective of improving air blowing efficiency, the fan was described in Japanese Utility Model Application Publication No. 149020/1983. A so-called cross-flow type cooling fan is sometimes used. The above-mentioned cross-flow type cooling fan is composed of a rotating drum, fan blades extending radially from the rotating drum, and a casing provided with an air inlet and an air outlet. Since it can be made large, cooling air can be passed through the rectangular radiator over a wide range. In addition, since the vertical width can be reduced, when mounted on the front of the vehicle, the vertical width of the front of the vehicle can be set small, and the degree of freedom in designing the vehicle can be improved. .

[Problem that the idea aims to solve]

By the way, the fan blade used in the above-mentioned cross-flow type cooling fan is formed so that its pressure side surface is concave and its suction side surface is convex. Therefore, when the vehicle's running speed exceeds a predetermined value, or when a strong wind acts on the vehicle in the opposite direction to the vehicle's traveling direction, the dynamic pressure of the air flow on the air intake side of the cooling fan decreases. The dynamic pressure of the airflow on the air discharge port side is greater than the rotational moment that acts on the fan blade in the direction opposite to the rotational direction of the rotating drum, creating rotational resistance of the cooling fan and reducing air blowing efficiency. Ta. Therefore, the present invention is useful when the vehicle speed increases,
Under conditions where strong winds enter the engine room, by appropriately controlling the direction of the wind hitting the fan blades of the cooling fan, the effect of the rotational moment in the opposite direction acting on the fan blades can be eliminated, and the rotational resistance of the cooling fan can be reduced. The purpose is to reduce

[Means to solve the problem]

In order to solve the above-mentioned problems, the present invention has been developed to provide a casing that includes a rotating drum, fan blades extending radially from the rotating drum, an air intake port and an air discharge port, and houses the rotating drum and the fan blades. In a cross-flow type cooling fan device for a vehicle equipped with a cross-flow type cooling fan consisting of A wind direction control device is provided to control the vehicle according to the driving condition, and the wind direction control device is controlled so that as the vehicle speed increases, the direction of the cooling air that hits the fan blade is directed toward the periphery of the suction side surface of the fan blade. It is characterized by having a wind direction guide fin.

[Effect]

According to the cooling fan device of the present invention, the wind direction control device is disposed between the cooling fan and the radiator,
The wind direction guide fin is tilt-controlled so that the direction of the wind hitting the fan blade is directed toward the periphery of the suction side surface of the fan blade as the vehicle speed and the pressure on the suction side of the cooling fan increase. Therefore, as the vehicle speed and the pressure on the suction side of the cooling fan increase, the airflow is directed to hit the periphery of the suction side surface of the fan blade, and as the vehicle moves to high speed or the pressure on the suction side of the cooling fan increases. As it increases, the rotational moment in the forward direction acting on the fan blade increases, and a decrease in the air blowing efficiency of the cooling fan is suppressed.

[Embodiment] An embodiment of the present invention will be described below based on the drawings. 1 to 4 are explanatory diagrams showing the main parts of an embodiment of the present invention, FIG. 1 is a schematic configuration diagram of a cross-flow type cooling fan device for a vehicle, and FIG. 2 is a configuration diagram of a wind direction control device. FIG. 3 is an explanatory diagram showing the inclination of the wind direction guide fin during idling, and FIG. 4 is an explanatory diagram showing the inclination of the wind direction guide fin when the vehicle is running. In FIG. 1, the cross-flow type cooling fan device for a vehicle according to the present embodiment includes a fan body 1, a casing 2 that accommodates the fan body 1, and a radiator 3 between the fan body 1 and the radiator 3 in the casing 2.
and a wind direction control device 4 located between. The fan body 1 consists of a rotating drum 5 and fan blades 6 extending radially from the rotating drum 5. The fan blades 6 have a concave surface on the pressure side and a convex surface on the suction side. It is formed. Further, the casing 2 is formed with an air intake port 7 connected to the radiator 3 and an air discharge port 8 formed downstream of the fan body 1. In the case of this embodiment, the air intake port 7 is connected to the radiator 3. It is arranged so as to cover the entire area of 3. In FIG. 2, the specific configuration of the wind direction control device 4 will be explained. 9 is a wind direction guide fin, and this wind direction guide fin 9 is rotatably supported by a stay 11 via a shaft 10. 10 shafts each
A pulley 12 is provided at one end of the pulley 12, and the diameter of the pulley 12 is set such that the lower it is in the figure, the smaller the diameter. A belt 13 is stretched around each pulley 12, and is configured to rotate in conjunction with the rotation of the belt 13. On the other hand, a pinion gear 14 is provided at the end of the shaft 10 located at the lowest position, and a worm gear 15 is attached to this pinion gear 14.
The driving force of the step motor 16 is transmitted through the step motor 16. A signal from a pulse generator 17 is input to the step motor 16, and a detection signal from a vehicle speed sensor 18 is input to the pulse generator 17. The generated pulse signal is output from the pulse generator 17 to the step motor 16. The operation of this embodiment in the above configuration will be explained. During idling, there is no signal input from the vehicle speed sensor 18, no pulse signal is output from the pulse generator 17 to the step motor 16, and the step motor 16 is held at its initial position. Therefore, the wind direction guide fin 9 is not rotated but is set parallel to the direction of inflow of the cooling air, as shown in FIG. When idling, cooling air flows in only by the rotation of the cooling fan (fan body 1).
The capacity of the fan body 1 determines the pressure conditions on the suction port side and the discharge port side. Therefore, the dynamic pressure on the suction port side does not become larger than the dynamic pressure on the discharge port side, and no rotational moment in the direction opposite to the rotational direction of the rotating drum 5 acts on the fan blade 6. A desired cooling air can be passed through the radiator 3 portion by the cooling fan. On the other hand, in the running state, a pulse signal corresponding to the vehicle speed is input from the vehicle speed sensor 18 to the step motor 16 via the pulse generator 17, and the step motor 16 rotates in accordance with the pulse signal. As the step motor 16 rotates, the worm gear 15, pinion gear 14, shaft 10,
Power is transmitted to each pulley via the lowermost pulley 12 and belt 13, and the wind direction guide fin 9
is rotated. At this time, the pulley 12 is set so that the lower the pulley 12 in FIG. 2, the smaller the diameter.
As shown in FIG. 4, the wind direction guide fins 9 become more inclined as they move downward. This inclination becomes larger as the vehicle speed increases, and as a result, the inclination of the wind direction guide fin 9 is obtained in accordance with the vehicle speed, so that the direction of the wind hitting the fan blade 6 is directed toward the periphery of the suction side surface of the fan blade 6. controlled. Therefore, as the vehicle moves to high speed, the rotational moment of the fan blade 6 in the forward direction increases.In other words, the action of the reverse moment is avoided, and the reduction in the efficiency of the cooling fan's fast air is suppressed, regardless of the vehicle running condition. First, cooling performance can be improved by efficiently rotating the cooling fan. Next, another embodiment of the present invention will be described. 5 and 6 are diagrams showing main parts of a cross-flow type cooling fan device according to another embodiment of the present invention, FIG. 5 is a perspective view showing the configuration of a wind direction control device, and FIG. 5 is a vertical sectional view showing a schematic structure of the thermowax shown in FIG. 5. FIG. In this embodiment, the means for driving the wind direction guide fin 9 is different from that in the first embodiment. In FIG. 5, the wind direction control device 4 includes a wind direction guide fin 9, a shaft 10, and a stay 11 that rotatably supports the shaft 10, and an arm 19 is attached to the shaft 10.
A connecting rod 20 connected to a thermowax 21 as a driving means is connected to this arm 19. The upper arm 19 has a longer axis, and as the thermowax 21 moves, the lower the wind direction guide fin 9, the greater the inclination. As shown in FIG. 6, the thermowax 21 includes a box 23 in which the wax 22 is filled;
A piston 25 and wax 2 are integrally provided with a connecting rod 20 that moves up and down within the box body 23 as the wax 22 expands and contracts and is connected to the arm 19.
A heater 24 is provided for heating 2. A power source 22 supplies current to the heater 24 in response to a detection signal from the vehicle speed sensor 18. The operation of this embodiment described above will be explained. During idling, there is no signal input from the vehicle speed sensor 18, the heater 24 is not energized, and the wax 22 does not expand. Therefore, the thermowax 21 is held at the initial position, and the wind direction guide fin 9 is not rotated but is set parallel to the direction in which the cooling air enters, as shown in FIG. When idling, cooling air flows in only by the rotation of the cooling fan (fan body 1).
The capacity of the fan body 1 determines the pressure conditions on the suction port side and the discharge port side. Therefore, the dynamic pressure on the suction port side does not become larger than the dynamic pressure on the discharge port side, and no rotational moment in the direction opposite to the rotational direction of the rotating drum 5 acts on the fan blade 6. A desired cooling air can be passed through the radiator 3 portion by the cooling fan. On the other hand, in a running state, current flows from the vehicle speed sensor 18 to the heater 24 according to the vehicle speed, the wax 22 is heated and expanded, and the wind direction guide fin 9 is rotated via the connecting rod 20, arm 19, and shaft 10. be done. At this time, since the upper arm 19 has a longer axis in FIG. 5, the wind direction guide fin 9 becomes more inclined toward the lower arm as shown in FIG. 4. This slope becomes larger as the vehicle speed increases. As a result, the wind direction guide fin 9 is tilted in accordance with the vehicle speed, and the direction of the wind hitting the fan blade 6 is controlled to be directed toward the periphery of the suction side surface of the fan blade 6. Therefore, as the vehicle moves to high speed, the rotational moment of the fan blade 6 in the forward direction increases.In other words, the action of the reverse moment is avoided, and a decrease in the air blowing efficiency of the cooling fan is suppressed, regardless of the vehicle's driving condition. , the cooling fan can be rotated efficiently to improve cooling performance. Although a specific embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and various embodiments may be included within the scope of the claims for utility model registration. For example, the means for detecting the running state of the vehicle may be replaced by a pressure sensor that detects the pressure state before or after the radiator, regardless of the vehicle speed sensor.

[Effects of the invention] As described above, according to the invention, the wind direction control device is disposed between the cooling fan and the radiator, and the wind direction guide fins move toward the fan blades as the vehicle speed and the pressure on the cooling fan suction side increase. The inclination is controlled so that the direction of the wind hitting the fan blade is directed toward the periphery of the suction side surface of the fan blade. Therefore, as the vehicle speed increases or the pressure on the cooling fan suction side increases, the airflow is directed to hit the periphery of the suction side surface of the fan blade, and as the vehicle moves to high speed or the pressure on the cooling fan suction side increases. As the rotational speed increases, the forward rotational moment acting on the fan blade increases, suppressing a drop in the cooling fan's air blowing efficiency, and improving cooling performance by rotating the cooling fan efficiently regardless of the vehicle's driving condition. It can be measured.

[Brief explanation of the drawing]

1 to 4 are explanatory diagrams showing the main parts of an embodiment of the present invention, FIG. 1 is a schematic configuration diagram of a cross-flow type cooling fan device for a vehicle, and FIG. 2 is a configuration diagram of a wind direction control device. FIG. 3 is an explanatory diagram showing the inclination of the wind direction guide fin during idling, FIG. 4 is an explanatory diagram showing the inclination of the wind direction guide fin in running condition, and FIGS. 5 and 6 are illustrations of the present invention. 5 is a diagram showing the main parts of a cross-flow type cooling fan device according to another embodiment, FIG. 5 is a perspective view showing the configuration of a wind direction control device, and FIG. 6 is a schematic configuration of the thermowax shown in FIG. 5. FIG. 2...Casing, 3...Radiator, 4...
Wind direction control device, 5... Rotating drum, 6... Fan blade, 7... Air intake port, 8... Air discharge port, 9... Wind direction guide fin.

Claims (1)

[Claims for Utility Model Registration] A cross-flow type consisting of a rotating drum, fan blades extending radially from the rotating drum, and a casing that includes an air intake port and an air discharge port and houses the rotating drum and fan blades. In a cross-flow type cooling fan device for a vehicle equipped with a cooling fan, the cooling fan is placed behind the radiator,
Additionally, a wind direction control device is installed between the cooling fan and the radiator to control the direction of the wind toward the fan blades according to the running condition of the vehicle. A cross-flow cooling fan device for a vehicle, comprising a wind direction guide fin that is controlled to direct the wind direction toward the periphery of the suction side surface of the fan blade.