JP2937772B2 - Radiator corrosion protection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing corrosion of a water-cooled radiator for cooling an engine. More specifically, the present invention relates to an apparatus for preventing electrochemical corrosion (hereinafter simply referred to as electrolytic corrosion) inside a radiator core.

[0002]

2. Description of the Related Art As shown in FIG. 10, a radiator of this type has a large number of tubes 1 having fins 1b fixed to an outer peripheral surface thereof.
The upper and lower radiator cores 1 each having an upper tank 2 and a lower tank 3 are provided. These tanks 2 and 3 are fixed to the radiator core 1 by a pair of support members 7 and 7 provided on both sides of the radiator core 1 in a non-contact state with the radiator core 1.
In recent years, synthetic resin molded articles that are inexpensive and can improve prevention of water leakage are used for the upper tank 2 and the lower tank 3. The radiator core 1 is made of a conductive material having excellent thermal conductivity, such as copper, aluminum or an alloy thereof, and the support members 7, 7 are made of a steel plate and fixed to a frame.

[0003]

The engine cooling water is charged by the power generated by the alternator, which is an auxiliary component of the engine, and the dark current (stray current) when the engine is stopped. On the other hand, as described above, since the radiator core is supported by the frame at the ground potential via the upper tank and the lower tank, the radiator core is not electrically connected to the frame. For this reason, a potential difference is generated between the radiator core and the engine cooling water flowing in the radiator core, causing corrosion of the radiator core. SUMMARY OF THE INVENTION It is an object of the present invention to provide an electric corrosion prevention device for a radiator capable of preventing electric corrosion between the cooling water flowing inside the radiator and the cooling water.

[0004]

In order to achieve the above object, the structure of the present invention will be described with reference to FIGS. 1, 4, 7, 8, and 9 corresponding to the embodiment. According to the present invention, a conductive upper core plate 14 and a lower core plate 15 are disposed at an upper end and a lower end of a radiator core 11, and an insulating upper tank 12 is provided on the upper and lower core plates 14, 15.
An insulating lower tank 13 is provided, and a pair of conductive support members 17 for fixing the upper tank 12 and the lower tank 13 in a non-contact state with the radiator core 11 are provided on both sides of the radiator core 11. It is an improvement of the radiator 10 mounted on the frame. The characteristic configuration is that conductive connecting members 19, 29, and 39 for electrically connecting the supporting member 17 and the radiator core 11 are provided.

Further, according to the present invention, the upper tank 12 and the lower tank 13 are water-tightly caulked at each end by an upper core plate 14 and a lower core plate 15 and a conductive caulking material 16 and conductively supported by a screw means 18 at each side. Member 1
7 and one end of the conductive connecting member 29 is
6 and the other end can be configured to be in close contact with the support member 17 by the screw means 18. Also,
The conductive caulking material 16 may be provided integrally with the upper core plate 14 and the lower core plate 15. Further, the conductive connection member 39 of the present invention may be an elastic plate whose base end is integrally attached to the support member 17 and whose front end is pressed against the radiator core 11 or the caulking member 16. Further, the conductive connecting member 39 may be an elastic plate whose base end is integrally attached to the conductive caulking member 16 and whose front end is pressed against the supporting member 17.

[0006]

The connecting members 19, 29 and 39 are radiator core 1
1 and the support member 17 are electrically conducted.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings. 1 to 9 show a radiator tank according to an embodiment of the present invention. In this example, the radiator 10 is used for a vehicle engine. The radiator 10 includes a radiator core 11 and an upper tank 12 and a lower tank 13 bonded to the upper and lower portions, respectively. The radiator core 11 includes a large number of tubes 11a and a large number of fins 11b.

Tube 1 constituting radiator core 11
1a and the fins 11b are formed by thin copper strips,
As shown in FIG. 2, the tube 11a is formed in an oval cross section. Returning to FIG. 1, a fin 11b formed in a waveform is fixed to the outer peripheral portion of the tube 11a over substantially the entire length of the tube 11a. The fin 11b is formed in a corrugated shape by a gear-type roll, and the tube 11a and the fin 11 are formed.
b are alternately arranged. Tube 11a and fin 11b
The radiator core 11 is formed by the
Are joined to an upper core plate 14 and a lower core plate 15, respectively.

The upper tank 12 and the lower tank 13 are made by molding a synthetic resin with a mold. A cooling water introduction pipe (not shown) for introducing or discharging cooling water and a cooling water discharge pipe 13a are integrally formed on one longitudinal side wall of the upper tank 12 and the lower tank 13, respectively. Cooling water warmed by an engine (not shown) flows from the cooling water introduction pipe, is cooled by the radiator core 11, and then flows out again to the engine from the cooling water discharge pipe 13a.

The radiator core 11 is joined to the upper tank 12 and the lower tank 13 in such a manner that the tanks 12 and 13 are water-tightly caulked at each end by an upper core plate 14 and a lower core plate 15 and a conductive caulking material 16. This caulking will be described with reference to the case of the upper tank 12 and the upper core plate 14 shown in FIG.

A recess 14a is provided at the periphery of the upper core plate 14 to which the periphery of the upper tank 12 can be mounted and to which the O-ring 10b can be mounted. On the outer surface near the periphery of the upper tank 12, a step portion 12c is provided over the entire periphery. The O-ring 1 is provided in the concave portion 14a of the core plate 14.
The peripheral edge of the upper tank 12 is mounted via Ob, and caulked by the caulking material 16. The caulking material 16 is provided over the entire circumference of the core plate 14, covers the concave portion 14 a from the outside with a caulked shape, and engages with the step 12 c of the upper tank 12 to attach the upper tank 12 around the core plate 14. It has become. This prevents the cooling water flowing inside the radiator 10 from leaking outside.

A pair of conductive support members for fixing the upper tank 12 and the lower tank 13 to both sides of the radiator core 11 in a non-contact state with the upper tank 12 and the lower tank 13 attached to the upper and lower parts of the radiator core 11, respectively. 17 are provided respectively. As shown in FIG. 1, the support member 17 is formed by bending both sides corresponding to the angles of the tanks 12 and 13, and holes 17a for mounting the tanks 12 and 13 are provided at the tip thereof. . Each of the tanks 12 and 13 is provided with a square hole 12e (only an upper tank is shown) into which a square nut 12d is inserted from the side, and a bolt 18 (FIG. 4) is screwed into the nut 12d through holes 17a and 17a of the support member. The support member 17 is connected to the upper tank 12 and the lower tank 13
Is fixed. The radiator 10 is provided on the support member 17.
10 for attaching to a chassis frame (not shown)
A screw hole 17b for attaching a is provided. The bracket 10a is provided with a hole 10b corresponding to the screw hole 17b. The bracket 10a is attached to the support member 17 with the bolt 17c (FIG. 2) through the hole 10b, and the radiator 10 is attached to a chassis frame (not shown) via the bracket 10a. That is, the radiator 10 is mounted on the chassis frame of the vehicle via the support member 17.

As shown in FIG. 1 and FIG. 2, a characteristic first configuration of this embodiment is that a support member 17 and a radiator core 11 are provided.
Is provided at the place where the conductive connecting member 19 for conducting the current is provided. The connection member 19 is made by processing a conductive steel plate into a U shape. As shown in FIG. 2, the width of the base 19a of the connection member 19 is slightly larger than the width of the support member 17, and the holes 19d corresponding to the holes 17b of the support member are provided.
(FIG. 1). The bulging portions 19c, 1 bulging inward are provided at the respective ends of the rising portions 19b, 19b.
9c is provided. To attach the connecting member 19, the rising portions 19b, 19b are inserted from the outside of the support member 17 toward the radiator core 11, and the bracket 10a is attached to the support member 17 via the base 19a. Attach the bolt 17c to the hole 10b of the bracket 10a and the base 1
This is carried out by inserting it into a hole 19d provided in 9a and screwing it into a screw hole 17b provided in the support member. Thereby, the connecting member 19 is connected to the support member 17 and the bracket 10.
a.

In the radiator 10 constructed as described above, as shown in FIG. 2, the rising portions 19b, 19b of the connecting member 19 attached to the supporting member 17 have the bulging portions 19c, 19c owing to their elasticity. It comes into pressure contact with the core 11. As a result, the radiator core 11 and the support member 17 are electrically connected by the connection member 19.

Although the connecting member shown in the first embodiment is formed in a U-shape and is configured so as to be conductive by sandwiching the radiator core, the connecting member is formed in an L-shape to form one side of the radiator core. Only the contact may be made. Also,
In the first embodiment, the connection member is sandwiched between the support member and the bracket. However, a screw hole dedicated to the connection member may be provided, and the bracket may be mounted and cut off to be mounted.

FIGS. 3 and 4 show a second embodiment of the present invention. In both figures, the same reference numerals as those in the above-described embodiment indicate the same components. The characteristic configuration of this embodiment is as follows.
6, and the other end is provided with a conductive connection member 29 that is in close contact with the support member 17 by the bolt 18. As shown in FIG. 3, the connecting member 29 is provided with a curved portion 29a corresponding to the step 12c of the tank 12 at one end of a square steel plate, and a bolt 18 for screwing the support member 17 to the upper tank 12 at the other end. Hole 29b into which can be inserted
Is provided. As shown in FIG. 4, the connecting member 29 is caulked by the caulking member 16 with the curved portion 29a attached to the upper tank 12, and the other end thereof is connected to the upper tank 1.
The support member 17 is pressed into contact with the support member 17 by being bolted between the support member 2 and the support member 17. The radiator thus configured includes a core plate 14 and a support member 17.
The electric conduction is performed through the caulking member 16 and the connecting member 29.

Although a square plate is machined in the second embodiment, the shape may be an ellipse, a triangle, or a dumbbell, and any shape that can be electrically connected is used. I just need. Further, in the second embodiment, one bolt hole is provided, but two or three holes may be provided corresponding to the number of bolts for mounting the support member. In FIG. 4 showing the second embodiment, the core plate 14 and the conductive connecting member 29 are spaced from each other by being caulked by the caulking material 16, as shown in FIGS. 5 and 6. They may overlap in a crimped state. Although the caulking material 16 is provided separately in the second embodiment, it may be provided integrally with the upper core plate 14 and the lower core plate (not shown) as shown in FIG.

FIG. 8 shows a third embodiment of the present invention. In the drawing, the same reference numerals as those in the above-described embodiment denote the same components. This embodiment is characterized in that the connecting member 39 is connected to the supporting member 17.
It is provided in one place. In this embodiment, the connecting member 39 is formed by cutting a part of the supporting member 17 by sheet metal processing so as to be bent toward the radiator core 11 side, and is configured so that an end thereof is an elastic plate pressed against the caulking member 16. In the radiator in which the connecting member 39 is provided integrally with the supporting member 17 in this manner, when the supporting member 17 is attached to the upper tank 12 and the lower tank 13 with the bolts 18, the tip of the connecting member 39 is attached to the radiator core 11 at the time of attachment. Alternatively, it comes into contact with the caulking member 16 due to its elasticity. As a result, the core plate 14 and the support member 17 are electrically connected via the connection member 39 or the caulking member 16 and the connection member 39.

In the third embodiment, the connecting member is provided integrally by cutting and raising the supporting member. However, a separate connecting member may be connected to the supporting member by welding or rivets to form an elastic body. . Further, in the third embodiment, the connecting member is provided integrally with the support member, but the connecting member 39 may be provided integrally with the caulking member 16 as shown in FIG. In this case, a part of the caulking member 16 may be cut and raised to be provided integrally, or a separate connecting member 39 may be joined to the caulking member 16 by welding or rivets to form the elastic body 39. In the radiator in which the connecting member 39 is provided integrally with the caulking member 16 in this manner, when the supporting member 17 is attached to the upper tank 12 and the lower tank 13 by the bolt 18, the tip of the connecting member 39 is attached at the time of attachment. Abuts on its elasticity. Further, in the first to third embodiments, the connection member is described at one place or at the connection place between the upper tank and the upper core plate, but may be provided at two to four places or at the connection place between the lower tank and the lower core plate. Further, in the first to third embodiments, the radiator used for the vehicle has been described. However, the radiator may be used for a radiator used other than the vehicle such as a ship or a portable generator.

[0020]

As described above, according to the present invention, a conductive connecting member for electrically connecting the radiator core to the support member is provided, and the radiator core is electrically connected to the ground potential frame via the support member. . As a result, the potential difference between the radiator core and the engine cooling water flowing in the radiator core can be eliminated, and the electrolytic corrosion between the radiator core and the cooling water flowing in the radiator can be prevented.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a radiator showing a first embodiment of the present invention.

FIG. 2 is a perspective view of the radiator of FIG.
FIG.

FIG. 3 is a perspective view showing a connecting member used in a second embodiment of the present invention.

FIG. 4 is a perspective view of the radiator assembled in FIG.
B sectional drawing.

FIG. 5 is a view corresponding to FIG. 4, showing another example.

FIG. 6 is a view corresponding to FIG. 4, showing another example.

FIG. 7 is a view corresponding to FIG. 4, showing another example.

FIG. 8 is a view showing a third embodiment of the present invention and corresponding to FIG. 4;

FIG. 9 is a view corresponding to FIG. 8 and illustrating another example.

FIG. 10 is a configuration diagram showing a conventional radiator.

[Explanation of symbols]

 Reference Signs List 11 radiator core 12 upper tank 13 lower tank 14 upper core plate 15 lower core plate 16 caulking material 17 support member 18 screw means (bolt) 19, 29, 39 connection member

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Showa 63-36888 (JP, U) Japanese Utility Model Showa 52-149936 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) F28F 9/00-9/26 F28F 19/00 511

Claims (5)

(57) [Claims] 1. A conductive upper core plate (14) and a lower core plate (15) are provided at the upper and lower ends of a radiator core (11), and an insulating upper tank is provided on the upper and lower core plates (14, 15). (12) and an insulating lower tank (13) are provided, and a pair of the lower tank (13) and the upper tank (12) are fixed to both sides of the radiator core (11) in a non-contact state with the radiator core (11). A conductive support member (17) is provided, and in the radiator (10) attached to the frame via the support member (17), the conductive member for electrically connecting the support member (17) and the radiator core (11). A corrosion prevention device for a radiator, wherein a connection member (19, 29, 39) is provided. 2. An upper tank (12) and a lower tank (13) having an upper core plate (14) and a lower core plate (1) at each end.
5) and the conductive caulking material (16) are water-tightly caulked, and each side is fixed to the conductive support member (17) by screw means (18), and one end of the conductive connecting member (29) is the caulking material. 2. The radiator corrosion prevention device according to claim 1, wherein said radiator is crimped together with said (16), and the other end is in close contact with said support member (17) by said screw means (18). 3. The conductive caulking material (16) is an upper core plate.
3. The radiator corrosion prevention device according to claim 2, wherein the radiator is integrally provided on the lower core plate and the lower core plate. 4. The conductive connecting member (39) has a base end provided with a supporting member (1).
4. An elastic plate which is integrally attached to the radiator core and whose tip is pressed against the radiator core or the caulking member.
The corrosion prevention device for a radiator according to any one of the above. 5. The conductive connecting member (39) is an elastic plate having a base end integrally attached to the conductive caulking member (16) and a distal end pressed against the supporting member (17). A radiator corrosion prevention device as described.