JPH0452427Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) The present invention relates to an engine cooling device, and is used in a radiator for cooling an automobile engine.

(Prior Art) As a prior art related to the present invention, there is an engine cooling system proposed in Japanese Patent Application No. 1981-081939 filed by the same applicant as the present application.

This conventional technology combines and integrates a plurality of arc-shaped heat exchangers, thereby forming a cylindrical heat exchanger assembly using the inner diameter part that is open on either the left or right sides in the axial direction or the inner diameter part that is open on either the left or right side as a shroud. an inner diameter portion that forms a body and is arranged in the left-right direction of the vehicle so that the central axis of the heat exchanger assembly is perpendicular to the traveling direction of the vehicle, and that is open on both left and right sides in the axial direction, or on either the left or right side in the axial direction; A cooling fan driven and rotated by a prime mover is provided in the heat exchanger assembly, and by forming the cylindrical heat exchanger assembly, the heat exchanger assembly is compact and has high heat dissipation. By providing a cooling fan on the inner diameter of the body, the resistance due to wind at vehicle speed is reduced and cooling efficiency is improved.

(Problem to be solved by the invention) In the above-mentioned conventional technology, the heat exchanger assembly consists of a cooler condenser and a radiator. The fins are fixed at the same pitch, and when the left and right cooling fans are driven when the vehicle is stopped or running at low speed, cooling air is blown to cool the heat dissipation fins. The cooling air has a large volume and a high flow velocity at a location close to the cooling fan.
Furthermore, since the flow velocity is slow near the center, the cooling air is not effectively utilized throughout the heat exchanger assembly, resulting in a decrease in cooling performance. By installing many heat dissipation fins as a means to improve cooling efficiency,
Although some improvement can be expected, the increase in the number of heat dissipation fins increases the ventilation resistance, making it impossible to effectively utilize the vehicle speed wind when driving at high speeds.

In view of the above, the technical objective of the present invention is to more effectively arrange heat dissipation fins to improve cooling efficiency.

[Structure of the idea]

(Means for solving the problem) The technical means taken to solve the above technical problem is to move the heat dissipation fins arranged between each tube of the heat exchanger assembly to the vicinity where the cooling fan is located. The fins are arranged at unequal pitches with close spacing between adjacent heat dissipation fins and a sparse spacing in the center.

(Operation) According to the above technical means, when the cooling fan is activated, the cooling air flows from the center of the heat exchanger assembly toward the outside through the vicinity of the cooling fan. At this time, the cooling air can be effectively utilized by the heat dissipation fins closely arranged between the tubes near the cooling fan where the cooling air is concentrated, and the cooling efficiency can be improved.

(Example) Hereinafter, an example of the present invention will be described based on the accompanying drawings.

Figures 1 and 2 show the engine cooling system of the present invention mounted on a vehicle; Figure 1 is a plan view;
FIG. 2 is a side view of FIG. 1.

In the figure, a cooler condenser 1 serving as a heat exchanger includes left and right tanks 2, 2 formed in an arc shape with tubular material, and a plurality of cooler condenser tubes 3 communicating between the left and right tanks 2, 2. and a plurality of heat radiation fins 4 fixed to each cooler condenser tube 3 by welding.

Further, the radiator 10, which is a heat exchanger, has left and right tanks 11, 11 formed in an arc shape with pipe material, and the left and right tanks 1, similar to the cooler condenser 1.
It consists of a plurality of radiator tubes 12 communicating between radiator tubes 1 and 11, and a plurality of heat radiation fins 4 fixed to each radiator tube 12 by welding.

The heat radiation fin 4 is a heat exchanger assembly 20 which will be described later.
A cooling fan 3 disposed within the inner diameter portions 21 and 22 of
In order to effectively cool the cooling air near the cooling fans 31 and 32, the cooling fans 31 and 32 are arranged at uneven pitches so that the distance between them is close to the adjacent heat dissipation fins 4, and sparsely spaced in the center. , the heat radiation fins 4 are arranged as described above.

The cooler capacitor 1 and the radiator 10 are
Both end surfaces 2 of tanks 2 and 2 of cooler capacitor 1
a, 2b, and tanks 11, 1 of the radiator 10
A cylindrical heat exchanger assembly 20 is formed by joining both end surfaces 11a and 11b of 1 by welding or connecting and integrating them using bolts, etc., and the inner diameter is open on both left and right sides in the axial direction. The parts 21 and 22 are shrouds. The heat exchanger assembly 20 is arranged in the left-right direction of the vehicle so that its central axis is perpendicular to the direction of travel of the vehicle, and is located in front of the engine 40.

The cooling fans 31 and 32 are connected to the heat exchanger assembly 2.
disposed within the inner diameter portions 21 and 22 on both the left and right sides of 0,
It is driven and rotated by a prime mover 34 via the same drive shaft 33.

With the above configuration, when the vehicle is stopped (idling), the cooling fans 31 and 32 are driven by the prime mover 34, and the shrouds 21 and 22 cause cooling air to flow as shown by the dotted line arrow in FIG. Cool 10. At this time, the cooling air is effectively cooled by the heat radiation fins 4 closely arranged near the cooling fans 31 and 32. Further, when the vehicle is running, wind flows at the vehicle speed as shown by the dotted line arrow in FIG. 2, cooling the cooler condenser 1 and the radiator 10. At this time, the resistance due to the vehicle speed wind is only caused by the prime mover 34 and the drive shaft 33, and the vehicle speed wind can be effectively utilized.

[Effect of idea]

As described above, the cooling fan is provided on the inner diameter part of the heat exchanger assembly formed in a cylindrical shape, and the heat radiation fins arranged between the tubes of the heat exchanger assembly are arranged in the vicinity of the cooling fan. By making the space between the parts close together and sparsely in the center part to make effective use of the cooling air, an engine cooling system with good cooling efficiency can be obtained.

[Brief explanation of drawings]

FIG. 1 is a plan view of an engine cooling system according to an embodiment of the present invention mounted on a vehicle, and FIG. 2 is a side view of FIG. 1. 1... Cooler condenser (heat exchanger), 2,1
1...Tank, 3, 12...Tube, 4...Radiation fin, 10...Radiator (heat exchanger), 2
0... Heat exchanger assembly, 21, 22... Inner diameter part of heat exchanger assembly, 31, 32... Cooling fan, 3
4... Prime mover.

Claims (1)

[Scope of utility model registration request] The axis A cylindrical heat exchanger assembly is formed with a shroud as an inner diameter part that is open on both the left and right sides of the direction, and the central axis of the heat exchanger assembly is arranged so as to be orthogonal to the traveling direction of the vehicle, and the above-mentioned axis In an engine cooling system equipped with a cooling fan arranged in an inner diameter part with openings on the left and right sides and driven and rotated by a prime mover, the heat exchange assembly is arranged between the heat radiating fins arranged between each tube, and the cooling fan is positioned The engine cooling system is arranged with close spacing between adjacent heat dissipation fins in the vicinity of the fins, and sparse sparse spacing in the center.