JPH0596777U - Heat exchanger - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a simple heat exchanger for cooling a relatively small engine such as a family motorcycle, which is lightweight and has a small number of parts. [Structure] Only one side surface of a bent metal pipe contacts a flat metal plate surface, and the contact portion is joined. A large number of air circulation holes are formed on the surface of the metal plate, and the heat exchanger mounting portion is formed on the metal plate.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a heat exchanger suitable for use in a family motorcycle having an engine displacement of about 50 CC.

[0002]

[Prior Art]

 In motorcycles and the like, a method of cooling the engine cooling water using a heat exchanger was used, but in family motorcycles with an engine displacement of about 50CC, an air-cooled engine was used. However, even with a small engine, it is preferable to keep the temperature rise of the engine below a certain level by water cooling.

[0003]

[Problems to be solved by the device]

 Therefore, an object of the present invention is to provide a heat exchanger suitable for such a small engine, which has a small number of parts, is lightweight, and has a simple structure.

[0004]

[Means for Solving the Problems]

 In the heat exchanger of the present invention, only one side surface of the bent metal pipe 1 contacts the surface of the flat metal plate 2, and the contact portion is joined. At the same time, a large number of air circulation holes 3 are formed on the surface of the metal plate 2, and the mounting portion 4 is provided on the metal plate 2.

[0005]

[Action]

 In the heat exchanger of the present invention, the first heat exchange medium flows in the metal pipe 1, and the cooling air flow flows in the outer surface of the metal pipe 1 and the surface of the metal plate 2, so that heat is exchanged between them. Then, the entire heat exchanger is attached in the vicinity of the engine via the heat exchanger attachment portion 4 provided on the metal plate 2.

[0006]

【Example】

 Next, embodiments of the present invention will be described with reference to the drawings. 1 and 2 show a first embodiment of the present invention, FIG. 1 is a front view thereof, and FIG. 2 is a sectional view taken along the line II-II in FIG. This embodiment has a rectangular metal plate 2 and a bent and meandering metal pipe 1. The metal plate 2 has a rising edge portion 7 formed on the entire periphery. Then, a large number of air circulation holes 3 are formed in the plane of the metal plate 2. The air circulation hole 3 is formed at the front end of the louver 6 by cutting and raising the louver 6 on the surface of the metal plate 2 as an example as shown in FIG. Then, only one side surface of the metal pipe 1 which is bent and meandered contacts the flat surface where the air circulation hole 3 does not exist, and the contact portion is fixed by soldering or brazing.

Both ends of the metal pipe 1 project from the metal plate 2, and a connection opening 5 is provided at the tip thereof. One end of a hose or the like (not shown) is connected to each of the connection openings 5, and the other end is connected to the water jacket of the engine. The thickness of the metal pipe 1 is generally thinner than that of the metal plate 2. For example, the metal pipe 1 has a thickness of about 0.1 to 0.3 mm, and the metal plate 2 has a thickness of about 0.5 to 1.2 mm. At four corners of the metal plate 2, mounting portions 4 formed of bolt insertion holes are formed. Then, as shown in FIG. 9, the heat exchanger 10 is arranged through the mounting portion 4 so that the plane of the metal plate 2 faces the front surface of the engine 9 of the family bike. Engine cooling water circulates in the metal pipe 1, and an air flow circulates in the air circulation holes 3 as the vehicle travels. The engine cooling water in the metal pipe 1 is cooled by the air flow.

Next, FIG. 3 shows a second embodiment of the present invention, in which the metal plate 2 of this embodiment is entirely curved. Such a heat exchanger can be easily manufactured by brazing or soldering the metal pipe 1 on the flat metal plate 2 and then bending the whole. If the plate thickness of the metal plate 2 is several times or more that of the metal pipe 1 and only the metal plate 2 is plastically deformed by applying an external force, the entire heat exchanger including the metal pipe 1 can be easily drawn. It can be curved as 3. By curving in this manner, it is possible to obtain a compact heat exchanger having a relatively narrow width suitable for family bikes and the like. FIG. 4 shows an embodiment in which the entire heat exchanger is formed in a V shape. Further, FIG. 5 shows an embodiment in which the transverse cross section is bent to form a U shape, and is arranged so as to surround the front of the engine 9 as an example.

Next, FIGS. 6 and 7 show still another embodiment of the present invention. In this embodiment, a louver 6 formed by cutting and raising the metal plate 2 is formed mainly on one surface side of the metal plate 2. It is tilted and raised, and its inclination angle θ is formed to be about 60 °. Next, FIG. 8 shows still another embodiment of the present invention. In this embodiment, a pair of metal plates 2 are joined to both side surfaces of a metal pipe 1, respectively. Conversely speaking, the metal pipe 1 is interposed between the pair of metal plates 2. Each metal plate 2 is the same as that shown in FIG. Instead of the louver 6, a large number of elongated holes may be formed in that portion.

[0010]

[Effect of the device]

 In the heat exchanger of the present invention, the bent metal pipe is in contact with the surface of the flat metal plate substantially only on one side surface, and the contact portion is joined. Further, since a large number of air circulation holes are formed on the surface of the metal plate and the heat exchanger mounting portion is provided on the metal plate, the number of parts is small, the manufacturing is easy, and the strength is high. Easy to install. Further, since the metal pipe has a structure in which the metal plate 2 is reinforced and one side surface thereof is joined, the heat exchange medium flowing in the metal pipe is unlikely to leak. Further, since the metal plate has the air circulation holes, heat exchange is promoted and the metal plate itself serves as a reinforcing plate and a mounting plate. Therefore, there is an effect that the heat exchanger can be provided at low cost. Further, since the thickness of the heat exchanger is extremely thin, clogging can be prevented and the weight can be reduced.

[Brief description of drawings]

FIG. 1 is a front view of a first embodiment of the heat exchanger of the present invention.

FIG. 2 is a schematic cross-sectional view taken along the line II-II of FIG.

FIG. 3 is a perspective view of a heat exchanger according to a second embodiment of the present invention.

FIG. 4 is a perspective view of the third embodiment.

FIG. 5 is a perspective view of the fourth embodiment.

FIG. 6 is a front view of the fifth embodiment.

FIG. 7 is a plan view of the same embodiment.

FIG. 8 is a plan view of the sixth embodiment.

FIG. 9 is an explanatory view showing an example of a usage state of the heat exchanger of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Metal pipe 2 Metal plate 3 Air circulation hole 4 Mounting part 5 Connection opening 6 Louver 7 Rising edge 8 Joint part 9 Engine 10 Heat exchanger

Claims (3)

[Scope of utility model registration request] 1. A bent metal pipe (1) is contacted with only one side surface of a flat metal plate (2) so that the contact portion is joined and the surface of the metal plate (2) is joined. A heat exchanger in which a large number of air circulation holes (3) are formed in the metal plate, and a heat exchanger mounting portion (4) is formed in the metal plate (2). 2. A metal pipe (1) bent on one plane is contacted with one side surface of a flat metal plate (2) to be joined thereto, and then the metal plate (1) and the metal plate (2) are joined together. )
A heat exchanger that is bent due to plastic deformation. 3. The heat exchanger according to claim 1, wherein both ends of the metal pipe (1) protrude from the metal plate (2) and a connection opening (5) is formed therein.