JPH0278895A - Structure of water tube for radiator - Google Patents

Abstract

PURPOSE:To improve cooling efficiency remarkably by a method wherein a water tube is provided with an extended piece, extending at least one of the fore-and-aft direction of a radiator, on a part thereof while the extended piece is abutted against cooling fins or projected to the fore part of the radiator and is slanted. CONSTITUTION:A water tube 30 is formed of a long circular tubular body 31 long in the fore-and-aft direction thereof while a long circular passage 32 is provided in the water tube 30. Upper and lower extended pieces 35, 39, provided at the end 36 of the tubular body 31 by extending both upper and lower pieces 34, 35 continuously and linearly as they are so that the thickness of the upper and lower pieces 34, 35 is equal, the upper and lower surfaces thereof form same planes, the root 37 of both pieces id formed into a semi-circular shape symmetry to the inner wall 36a of the end and are connected to the end 36 to form a section of I-shape at this part. Two pieces of water tubes 30 are arranged and the water tubes 30, 30 are separated forwardly and rearwardly from each other while the extended pieces 38, 39 are arranged symmetrically respectively. The upper and lower surfaces 31a, 31b of the tubular body 31 of the water tubes 30 and the upper and lower surfaces 38a, 39a of the extended pieces 38, 39 are abutted against cooling fins 16,... while such water tubes 30 and cooling fins 10 are laminated to form a core 17.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a radiator water tube structure with improved cooling performance.

(Prior Art) A water-cooled vehicle engine is equipped with a radiator as a cooler for engine cooling water.

The radiator is Japanese Patent Publication No. 59-500877 and Japanese Patent Publication No. 62
-67216 and other publications, it consists of tanks spaced apart from each other, a large number of water pipes that communicate and connect the tanks, and cooling fins for heat exchange provided around the water pipes. Hot water after cooling the engine is introduced into one tank, and from the tank it passes through a water pipe to the other tank. During the process of flowing through the water pipe, it is cooled by exchanging heat with the outside air by cooling fins. The cold water is returned to the engine from the tank.

(Technical Problem to be Solved by the Invention) In such a radiator, in order to increase the cooling efficiency of Reikawa water flowing through the water pipes, Japanese Patent Publication No. 59-500877 provides recesses in various patterns in the water pipes to increase the surface area and improve heat exchange. One proposal has been made to promote cooling and improve cooling performance.

Although this conventional technology forms a large number of recesses on the surface of the water tube, it is difficult to increase the surface area of the water tube.Secondly, the contact area with the cooling fins, and therefore the heat transfer area for heat exchange, is limited by the protrusions between the recesses. Therefore, it is difficult to significantly improve cooling efficiency. Furthermore, the concave portions on the front and back sides of the water tube protrude into the cooling water passage of the water tube, and as a result, the flow resistance of the cooling water within the water tube increases, the flow rate of the cooling water decreases, and the cooling efficiency decreases.

The present invention has been made in view of the above-mentioned prior art, and its purpose is to significantly improve the cooling efficiency of the radiator, to provide a radiator with excellent cooling performance, and to solve the above problems by eliminating a large number of old replacements on both the front and back of the water tube. The reason is that this can be achieved with a simple structure without the need to form.

(Means for solving the technical problems) The means for solving the above technical problems is to provide a part of the water pipe with an extension piece that extends in at least one of the front and back directions of the radiator, and The extending piece is brought into contact with the cooling fins, or the extending piece is made to project forward of the radiator and be inclined.

(Effects of the above means) According to the above means, the surface area of the water pipe and therefore the heat radiation area are increased by the extending piece, and the heat transfer area to the cooling fin is increased by bringing the extending piece into contact with the cooling fin. A radiator grill can be formed by protruding forward of the radiator and tilting it downward or the like.

(Embodiment) Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 10 shows a motorcycle as an example of a vehicle equipped with a radiator, and the motorcycle 1 supports a front fork 5 that supports a front wheel 4 via a helad tube 3 at the front end of a frame 2 and is steerable by a handle 6. . frame 2
A fuel tank 7 is mounted on the main frame 2a tilted rearward downward, and an engine 8 is mounted below. A seat 9 is arranged behind the fuel tank 7, and a rear wheel 10 is mounted rearward from the rear lower part of the frame.
A rear fork 11 supporting the rear fork 11 is pivotally extended, and a rear fork 12 is interposed between the rear fork 11 and the frame. The engine 8 is a water-cooled engine, and a radiator 13 is disposed on the upper front surface of the front part of the engine 8 that is tilted forward and upward.

The radiator 13 is as shown in FIG. 1, which shows a rear view. The radiator 13 has a core 17 consisting of tanks 14 and 15 on both sides, water pipes 30 between them, and cooling fins 16. A water supply port 19 is provided on the front side, and the port 18 is connected to the cooling water outlet of the engine.
Configure the hot water tank. The hot water tank 14 extends in the left and right direction, and has a large number of water pipes 30 arranged vertically at a predetermined pitch.
... is connected to the cooling water tank 15, and the water pipe 30.
... are in contact with the cooling fins 6 ..., the top and bottom of the core 17 consisting of the cooling fins 16 ..., the water pipes 30 ... are supported by frames 20, 21, and the bottom of the cooling tank 15 is A cooling water outlet 22 is provided and is in communication with the cooling water supply of the engine.

The frame 20.21 is provided with mounting stays 23.24 for attaching to the frame and engine side, and a cooling fan 25 is provided on the back of the core 17, and an annular cover 26 of the fan 25 is provided.
is supported by Stay 27... and Iki 20°21.

FIG. 2 is a longitudinal sectional view of the upper part of the radiator 13, taken along the line 2--2 in FIG. 1, and FIG. 3 is a longitudinal sectional view of the water pipe.

The water tube 30 is formed of an elliptical tube body 31 that is long in the front-rear direction, and has an elliptical passage 32 formed therein. Pipe body 31
One end 33 is semicircular, and the upper and lower pieces 34° and 35 are vertically spaced apart from the upper and lower ends of the semicircular shape in parallel to the curved direction.
It extends in six directions, and the inner wall 36a of the other end 36 forms a semicircle so as to be symmetrical with the one end 33. Upper and lower extension pieces 38.39 are provided at the upper and lower ends of the other end 36, and the upper and lower pieces 34.35 are continuously extended linearly along the side thereof, and the extension pieces 38.39 are thicker than the upper and lower pieces 34.35. are equal, and the upper and lower surfaces thereof are on the same plane, and the bases 37 of the extension pieces 38 and 39 have a semicircular shape that is symmetrical to the end inner wall 36a. to do.

The water tube 30 described above is made of a metal with good thermal conductivity such as an aluminum alloy or a copper alloy, and is formed to be long in the front and back directions of the paper with the cross section shown in FIG. 3
1 and the embodiment are formed integrally, but they may be formed separately and joined to the end of the tubular body 31.

In Fig. 2, two of these water pipes 30 are arranged in the front and back in the same plane, and in Fig. 2, the left side is the front and the right side is the rear.
．． 30 are arranged symmetrically so that the extension pieces 38 and 39 are spaced apart from each other in the front and back so that the front part faces the front and the rear part faces the rear.

and the upper and lower surfaces 31a of the tube body 31 of the water tube 30.

Upper surface 38a of each of the 31b1 extension pieces 38,39.

The core 17 is formed by bringing the lower surface 39a into contact with the cooling fins 16, and stacking the water pipes 30 and the cooling fins 16. This is shown in Figure 2.

In the above description, cooling water flows through the passage 32 in the water pipe 30 in the direction of the front and back of the paper in FIGS. Since it is provided integrally with the tube body 32, the heat radiation area becomes large, and the upper and lower extension pieces 38 and 39 are provided on the cooling fin 1.
6..., the contact area with the upper and lower surfaces of the tube body 31 becomes a dog, and the heat radiation due to heat transfer to the cooling fins 16... increases by the amount of the extension pieces 38, 39, The heat radiation area of the water tubes through the cooling fins 16 increases, the amount of heat radiation per unit area of the radiator increases, and the cooling performance improves.

In the embodiment, two water pipes 30 are arranged in the same plane so that the flow can flow in the front and back direction of the radiator, and extending pieces 38 and 39 are sandwiched between the cooling fins 16 and come into contact with the upper and lower cooling fins. The outer side, that is, the front one extends forward, and the rear one extends rearward, but since the extending pieces 38 and 39 face outward and are open in a bifurcated manner, contact with the outside air is prevented. This further enhances the heat dissipation effect.

FIG. 4 shows a second embodiment of the water pipe.

In this embodiment, extending pieces 138, 138, 139° 139 are installed at the front and rear of the pipe body 131 of the water pipe 130, which are vertically spaced apart, and unlike the previous embodiment, the water pipe 130 is a single tree in the same plane, A piece 138, 1 extending in the front and back direction of the radiator
38, 139° 139 is oriented so that the upper and lower surfaces of the pipe body 131, as well as the upper and lower surfaces thereof, are in contact with the upper and lower cooling fins.

FIG. 5 shows a third embodiment of the water pipe.

In this embodiment, a semicircular outer surface 236b of the outer end of the pipe body 231 of the water pipe 230, that is, the end 236 facing the front of the radiator.
An extending piece 238 of a predetermined length is provided at the center of the radiator so as to project forward of the radiator, and the extending piece 238 is one piece.

In this embodiment, the upper and lower surfaces 231a of the tube body 231.

231b contacts the cooling fins, and the extending piece 238 does not contact the cooling fins, but extends forward between the upper and lower cooling fins. Therefore, although the contact area between the water pipe 230 and the cooling fins does not increase, the heat radiation area increases due to the extension piece 238, and the extension piece 238 functions as a cooling fin, and promotes heat radiation by the air flowing between the upper and lower cooling fins.

FIG. 6 shows a fourth embodiment, in which both outer ends of a pipe body 331 of a water pipe 330 (ends in the longitudinal direction of the radiator) 333.
336. Wooden extension pieces 338, 338 are integrally provided at the intermediate portion of the outer surface, respectively, at the front and the rear, respectively. In this embodiment as well, the upper and lower surfaces 331a, 331 of the tube body 331
b comes into contact with the cooling fin, and the front and rear extending pieces 338, 338
is located between and separated from the cooling fins, and faces the gap in the front and rear direction of the radiator.

FIG. 7 shows a fifth embodiment, in which a single extension tube is installed between the intermediate portions of the opposing ends 433 and 436 of the tube bodies 431 and 431 of two water tubes 430 and 430, spaced apart from each other in the front and rear. They are connected by a protruding connecting piece 440. Two vertically spaced extending pieces 438, 439, 438, 439 are provided at the opposite ends of the tube bodies 431, 431, that is, at each end 436, 433 in the longitudinal direction of the radiator without the connecting piece 440. The upper and lower surfaces 431a of each tube body 431, 431
, 431a, 431b, 431b, each extension piece 438, 4
39... upper and lower surfaces 438a.

439a... comes into contact with the upper and lower cooling fins, and the connecting piece 4
40 is spaced apart from the upper and lower cooling fins.

In this embodiment, the water pipe 43o is connected to the connecting piece 440.

430 are interconnected, and a connecting piece 440 connects the front and rear water pipes 4.
Heat is exchanged between 30 and 430, and water pipe 430.43
It is possible to equalize the heat dissipation between 0 and 0.

FIGS. 8 and 9 show a sixth embodiment.

In this embodiment, there are two water pipes disposed between the cooling fins 16 in the front and rear in the same plane as shown in FIG.
0, and the front water pipe 530 has one extending piece 538 extending forward from the middle part of the outer surface of the front end 536 of the pipe body 531, and the extending piece 538 contacts the upper and lower cooling fins 16... Cooling fins 16, which are located between the cooling fins and constitute a part of the core of the radiator 13, are made to protrude a predetermined length forward from the front end thereof. The protrusion 538a is bent and inclined forward and downward, and the water pipe 530 at the front between the cooling fins 16...
The extending pieces 538 of . . . are similarly constructed.

For the rear water pipes 550, a single extending piece 558 is provided extending rearward from the middle part of the outer surface of the rear end 553.

In the above embodiment, the extending piece 538 of the water pipe 530 protrudes in front of the cooling fin 16 and is tilted forward and downward, so that it functions as a radiator grill, and the conventional radiator grill can be abolished. Since the front part of the extension piece 538 protrudes in front of the radiator, it is exposed to the wind while the vehicle is running, increasing the cooling effect and also functioning as a guide for the wind toward the cooling fins, further enhancing the cooling effect. .

(Effects of the Invention) According to the present invention as described above, since the extending pieces are provided on the water pipes, the surface area of the water pipes, and thus the heat radiation area, increases, thereby increasing the heat radiation effect, and the extending pieces can be used as cooling fins. By bringing them into contact, the contact area with the cooling fins increases, and as a result, the heat dissipation area increases, the amount of heat dissipation per unit area of the radiator can be increased, and a radiator with excellent cooling performance can be obtained.

Further, the extending piece may be integrated with the water pipe or may be a separate piece and joined by a method, and the structure is simple and easy to manufacture.

Furthermore, by making the extension piece protrude in front of the radiator, the radiator grill can be abolished while still functioning as a radiator grill.The protruding part increases the heat radiation area and gives preferential roughness to the driving wind, resulting in even higher heat radiation. There are many advantages such as the ability to obtain effects.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a rear view of the radiator, FIG. 2 is an enlarged longitudinal sectional side view of the same main part, and FIG.
The figure is an enlarged vertical side view of the water pipe, Figure 4 is a vertical side view of the second embodiment of the water pipe, Figure 5 is a similar view of the third embodiment, and Figure 6 is a similar view of the third embodiment.
The figure is a similar view of the fourth embodiment, FIG. 7 is a similar view of the fifth embodiment, FIG. 8 is a perspective view of the sixth embodiment, FIG. FIG. 10 is a side view of a motorcycle equipped with a radiator. In addition, in the drawing, 13 is a radiator, 14.15 is a tank, 1
6 is cooling fin, 30,130,230°330.43
0,530 is water pipe, 38,39°138.139,23
8,338,438°439.538 are extension pieces. Patent Record Applicant Honda Motor Co., Ltd. Agent Patent Attorney 2 1) Yong-Immediate Question Patent Attorney Dai
Kuni Hashi Onma Patent Attorney Yu Koyama Figure 2 Figure 8 Tsuma Figure 9

Claims (4)

[Claims] 1. In a radiator consisting of a large number of water pipes communicating between tanks arranged apart from each other, and cooling fins provided on the outer periphery of the water pipes, a part of the water pipes extends in at least one of the front and back directions of the radiator. A radiator water pipe structure characterized by having an extending piece. 2. 2. The water pipe structure for a radiator according to claim 1, wherein two extending pieces of the water pipe extend in at least one of the front and rear directions of the radiator and are spaced apart from each other, and each extending piece is brought into contact with a cooling fin. . 3. 2. A water pipe structure for a radiator according to claim 1, wherein the extending piece of the water pipe is provided at an intermediate portion of the water pipe so as to extend in at least one of the front and rear directions of the radiator and to be spaced apart from the cooling fins. 4. 2. The radiator water pipe structure according to claim 1, wherein the extending piece of the water pipe is provided extending in front of the radiator, and the tip of the extending piece is made to project in front of the radiator so that the protruding part is inclined.