JPH04115269U - internal combustion engine radiator - Google Patents

Abstract

(57) [Summary] [Purpose] Improved radiator cooling performance by lowering pressure drop and allowing cooling air to flow downstream of the core. [Structure] A plurality of triangular notches 4 are provided at equal pitches on the top and bottom of the front surface of the core 1 constituting the radiator, with the apex at the back side, and front notches are provided on the top and bottom of the rear surface in the width direction. The pitch 5 is a plurality of triangular notches 6 of the same size as the notch 4 with the apex on the back side provided at equal pitches at positions shifted by half a pitch. [Effect] It is possible to reduce the resistance of the radiator and improve the limit value in the thickness direction of the conventional core, thereby improving cooling performance.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a radiator for an internal combustion engine.

0002

[Conventional technology]

Conventionally, general-purpose machines have been developed, for example, as seen in Japanese Utility Model Application Publication No. 57-157718. Some radiators used in engines such as With the increasing trend towards sound, multiple radiators have been installed to increase the heat dissipation area and improve heat balance. There is something that allows you to However, in the case of construction machinery, there is a need for visibility in front and Due to the commonality of the vehicle body, there are restrictions on the height and width of the radiator core, so the above arrangement is not possible. Therefore, the lack of heat dissipation area can be compensated for by increasing the core thickness or by increasing the fan air volume. It's covered.

0003

[Problem that the idea aims to solve]

However, this method has its limitations for the following reasons. Radiator thickness ( Even if the number of rows is increased, the amount of heat dissipation does not increase. In other words, the graph in Figure 4 shows As shown by the line, as the number of rows increases, the pressure drop increases, so the cooling air volume decreases and the amount of heat radiation decreases. It will hardly increase. Noise increases when the cooling air volume is supplemented by fan rotation.

0004 In view of this, the present invention has been designed to reduce pressure drop and allow cooling air to flow downstream of the core. For the purpose of providing engine radiators and eliminating the drawbacks of conventional technology. It has been done.

[0005]

[Means to solve the problem]

As a means of solving the problems of the prior art described above, the present invention There are multiple triangular cutouts at equal pitches on the top and bottom of the front of the On the top and bottom of the rear side, the apex on the back side is at a position shifted by half a pitch from the front notch pitch. A plurality of triangular notches of the same size as the aforementioned notches are provided at equal pitches. It is characterized by:

[0006]

[Effect]

With the above configuration, cooling air flows more easily in the direction of the notch with less resistance, and the radiator The resistance of the cooling air passing through the tank decreases accordingly, and the amount of heat dissipated increases.

[0007]

【Example】

FIG. 1 is a side view showing a radiator of an internal combustion engine according to the present invention, and FIG. 2 is an A-A in FIG. In the cross-sectional view, 1 is the core of the radiator, 2 is the engine body, and 3 is the fan. FIG. 3 is a drawing showing the state of the notch on the front surface of the radiator.

[0008] The present invention is designed to create triangles on the top and bottom of the front surface of the core 1 that make up the radiator, with the back side being the apex. A plurality of shaped notches 4 are provided at equal pitches, and the front notches are placed on the top and bottom of the rear surface. A notch of the same size as the above-mentioned notch 4 with the apex on the back side is located at a position shifted by half a pitch from the notch 5. It is composed of a plurality of triangular notches 6 provided at equal pitches.

[0009] The core 1 shown in FIG. 2 is a polygon connecting the upper tank 7 and the lower tank 8 shown in A number of tubes 1a and a number of fins 1 connecting these tubes 1a laterally. When the cooling air enters the core 1 from the direction of the arrow, it passes between the tubes and exits on the opposite side. However, in this invention, since notches 4 and 6 are provided, core 1 can be passed through. When it comes out, more of it exits through the notch where there is less resistance. This results in fig. As shown by the dotted line in 4, the pressure drop decreases, and therefore the amount of heat dissipation increases.

0010

[Effect of the idea]

As explained above, the present invention is designed to provide a There are multiple triangular notches at equal pitches with the apex on the side, and the front The notch pitch with the apex on the back side is shifted by half a pitch from the notch pitch on the surface. Since multiple triangular notches of the same size are provided at equal pitches, the radiator It is possible to reduce resistance and improve the limit value in the thickness direction of conventional cores, improving cooling performance. ability to improve.

[Brief explanation of drawings]

FIG. 1 is an explanatory side view of a radiator of an internal combustion engine according to the present invention.

FIG. 2 is an explanatory diagram showing a cross section taken along line AA in FIG. 1;

FIG. 3 is an explanatory diagram showing the state of the notch on the front surface of the radiator.

FIG. 4 is an explanatory diagram of a graph showing a comparison of the performance of the conventional radiator and the radiator of the present invention.

[Explanation of symbols]

1 core 4 Notch 5 Notch pitch 6 Notch

Claims (1)

[Scope of utility model registration request] [Claim 1] A plurality of triangular notches with the apex at the rear side are provided at equal pitches on the top and bottom in the width direction of the front surface of the core that constitutes the radiator, and the top and bottom of the rear surface are provided with a notch pitch on the front side. 1. A radiator for an internal combustion engine, characterized in that a plurality of triangular notches of the same size as the aforementioned notches are provided at equal pitches at positions shifted by a half pitch and the apex is on the rear side.