JP3810883B2 - Radiator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a radiator for cooling an engine of an automobile or the like.
[0002]
[Prior art]
Conventionally, as a radiator for cooling an engine of an automobile or the like, for example, one disclosed in Japanese Utility Model Laid-Open No. 3-30527 is known.
FIGS. 7 and 8 show a radiator disclosed in this publication. In this radiator, a resin tank 5 having a cooling water space 3 is disposed at one end of the heat exchanging portion 1.
[0003]
A cooling water channel 5 a is formed on the outer wall of the tank 5, and a container-shaped reserve tank 7 is disposed outside the cooling water channel 5 a so as to cover the tank 5.
A filler neck portion 5 b is formed at the upper end of the tank 5.
An annular protrusion 5c is formed on the inner side of the filler neck 5b, and a radiator cap 9 is tightly fixed to the annular protrusion 5c.
[0004]
The radiator cap 9 is formed with a pressure adjusting valve 9a and a negative pressure valve 9b.
Further, one end of the cooling water flow path 5a is opened to the outside of the annular protrusion 5c of the filler neck part 5b, extends horizontally toward the reserve tank 7, and is further bent in the resin of the tank 5, 5 extends below the reserve tank 7.
[0005]
In the above-described radiator, when the cooling water expands due to a temperature rise, the pressure regulating valve 9a of the radiator cap 9 opens, the cooling water in the cooling water space 3 flows into the filler neck portion 5b, passes through the cooling water flow path 5a, and is a reserve tank. 7 is introduced.
When the cooling water contracts due to a temperature drop, the negative pressure valve 9b opens, and the cooling water in the reserve tank 7 flows into the tank 5 through the cooling water flow path 5a.
[0006]
[Problems to be solved by the invention]
However, in such a conventional radiator, one end of the cooling water flow path 5a is opened in the immediate vicinity of the annular protrusion 5c of the filler neck 5b, and the cooling water flow path 5a is bent in the resin of the tank 5 to reserve the tank 7 Therefore, the shape of the cooling water flow path 5a is complicated, and after the tank 5 is resin-molded, the annular protrusion 5c side of the cooling water flow path 5a has to be cut. .
[0007]
Further, since the other end of the cooling water flow path 5a is opened in the container-shaped reserve tank 7, the tank 5 and the reserve tank 7 cannot be formed integrally, and the parts cost and assembly cost increase. was there.
Furthermore, since the annular protrusion 5c of the filler neck part 5b is formed of resin, there is a possibility that the annular protrusion 5c may be deformed due to constant contact with high-temperature and high-pressure cooling water. There is a problem that the close contact state between the protrusion 5c and the radiator cap 9 cannot be maintained, and the pressure regulating valve 9a and the negative pressure valve 9b are not normally operated.
[0008]
The present invention has been made to solve such conventional problems, and an object of the present invention is to provide a radiator capable of reliably performing processing for expansion and contraction of cooling water with a simple structure.
[0009]
[Means for Solving the Problems]
The radiator according to claim 1 is configured such that a long first tank and a second tank having a cooling water space are arranged to face each other at a predetermined interval, and between the first tank and the second tank. In a radiator having a heat exchange portion in which heat radiation fins and tubes are alternately stacked, a reserve space is integrally formed in the first tank adjacent to the cooling water space by extrusion molding. In addition, a cooling water flow path connecting the cooling water space and the reserve space is integrally formed between the cooling water space and the reserve space by the extrusion along the longitudinal direction of the cooling water space. The upper end of the first tank exposes the opening end of the cooling water space and the flow opening end of the cooling water flow path, and allows the cooling water to flow between the cooling water space and the cooling water flow path. Have space The filler neck is disposed so as to cover the opening end of the cooling water space and the circulation opening end of the cooling water flow path, and the axial direction is aligned with the longitudinal direction at the opening end of the cooling water space. A radiator cap is disposed, and a bottom portion of the radiator cap is closely fixed to an opening end of the cooling water space .
[0010]
A radiator according to a second aspect is the radiator according to the first aspect , wherein the cooling water flow path is formed in an elongated shape in cross section.
[0011]
The radiator according to claim 3 is the radiator according to claim 1 or 2 , wherein the first tank is made of an aluminum alloy.
[0012]
(Function)
In the radiator according to the first aspect, the cooling water space, the reserve space, and the cooling water flow path are easily integrally formed in the first tank along the longitudinal direction of the first tank by extrusion molding.
[0013]
Moreover, since the flow opening end of the cooling water passage and the opening end of the cooling water space are formed inside the filler neck portion disposed at the upper end of the first tank, a linear cooling water passage is easily formed. In addition, the bottom of the radiator cap is closely fixed to the open end.
In the radiator according to the second aspect, the cooling water flow path is formed in an elongated cross-sectional shape, the cross-sectional area is increased, and the flow amount of the cooling water to the cooling water flow path is increased.
[0014]
For this reason, according to expansion and contraction of the cooling water, the cooling water is quickly circulated between the cooling water space and the reserve space.
In the radiator according to claim 3 , since the first tank is formed of an aluminum alloy, deformation of the opening opened at the upper end of the first tank due to long-term indirect contact with high-temperature and high-pressure cooling water is prevented, Cooling water is circulated between the cooling water space and the reserve space without causing malfunction.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIGS. 1 to 3 show an embodiment of a radiator according to the present invention (corresponding to claims 1 to 3 ). Reference numerals 21 and 23 denote, for example, a long first made of an aluminum alloy. And a second tank.
[0016]
The first tank 21 is formed by a tank body 25 and an upper lid plate 27 and a lower lid plate 29 that are fixed to both ends of the tank body 25 in the longitudinal direction.
An outlet pipe 33 and an inlet pipe 35 for the cooling water 31 are connected to the side walls of the first and second tanks 21 and 23.
Between the 1st and 2nd tanks 21 and 23, the heat exchange part 37 which consists of aluminum alloys, for example is arrange | positioned.
[0017]
In the heat exchanging portion 37, the heat radiation fins 39 and the tubes 40 are alternately stacked, and both left and right ends of the tubes 40 are inserted into the first and second tanks 21 and 23.
Further, a cylindrical cooling water space 25 a penetrating in the longitudinal direction of the tank body 25 is formed on the heat exchanging portion 37 side in the tank body 25.
[0018]
A reserve space 25b penetrating in the longitudinal direction of the tank body 25 is formed on the side of the tank body 25 opposite to the heat exchanging portion 37.
A cooling water passage 25c adjacent to the cooling water space 25a is formed between the reserve space 25b and the cooling water space 25a.
The cooling water passage 25c is formed in an elongated arc shape in cross section along the outer periphery of the cooling water space 25a.
[0019]
The upper end of the cooling water passage 25c is penetrated into the upper end of the tank body 25, and a notch 25d for circulation of the cooling water 31 opened to the reserve space 25b side is formed at the lower end of the cooling water passage 25c.
[0020]
Above the opening end 25e of the upper end of the cooling water space 25a of the upper cover plate 27 and the flow opening end 25f of the upper end of the cooling water flow path 25c, openings 27a and 27b having the same shape as the opening end 25e and the flow opening end 25f are provided. Is formed.
An air hole 27 c is formed above the reserve space 25 b of the upper lid plate 27.
In addition, a filler neck portion 41 is disposed on the upper cover plate 27, and openings 27 a and 27 b are positioned inside the filler neck portion 41.
[0021]
A radiator cap 43 is disposed on the filler neck 41, and a bottom 43a of the radiator cap 43 is in close contact with the opening 27a.
The radiator cap 43 is formed with a pressure adjusting valve 43b and a negative pressure valve 43c.
In the radiator described above, first, a tank body 25 having a cooling water space 25a, a reserve space 25b, and a cooling water flow path 25c is integrally formed by extrusion molding, and an upper lid plate 27 and a lower lid plate 29 are formed in the tank body 25. The first tank 21 is manufactured by brazing.
[0022]
Simultaneously with the brazing of the first tank, the filler neck 41, the outlet pipe 33 and the heat exchange unit 37, the second tank 23, and the inlet pipe 35 are brazed to the first tank 21, and the radiator is installed. Manufactured.
In the above-described radiator, the cooling water 31 is circulated in the radiator as described below.
[0023]
That is, as shown in FIG. 4, first, the cooling water 31 heated by the engine flows into the second tank 23 from the inlet pipe 35, passes through the tube 40 of the heat exchanging portion 37, and is heat-exchanged. The
The cooling water 31 that has been heat-exchanged and cooled is introduced into the cooling water space 25 a of the tank body 25 and discharged from the outlet pipe 33.
[0024]
Further, when the cooling water 31 expands due to the temperature rise of the cooling water 31, the pressure adjustment valve 43b of the radiator cap 43 is moved upward by the pressure generated by the expansion of the cooling water 31 as shown in FIG. A gap is generated between the radiator cap 43 and the opening 27a.
And the cooling water 31 which overflowed in the filler neck part 41 through this clearance gap flows in into the reserve space 25b through the cooling water flow path 25c.
[0025]
Further, when the cooling water 31 contracts due to the temperature drop of the cooling water 31, the negative pressure valve 43c is opened by the negative pressure generated in the cooling water space 25a as shown in FIG. 6, and the cooling water in the reserve space 25b is cooled. 31 flows backward through the cooling water passage 25c and flows into the cooling water space 25a from the filler neck portion 41.
In the radiator configured as described above, the tank body 25 having the cooling water space 25a, the reserve space 25b, and the cooling water flow path 25c is integrally formed by extrusion, so that the processing function during expansion and contraction of the cooling water 31 is achieved. Can be easily provided in the first tank 21, and the expansion and contraction of the cooling water 31 can be reliably performed with a simple structure.
[0026]
Further, since the flow opening end 25f of the cooling water passage 25c of the tank body 25 is formed inside the filler neck portion 41 fixed to the upper end of the first tank 21, the cooling water passage 25c is formed in a linear shape. The tank body 25 can be easily formed by extrusion.
And since the opening end 25e of the cooling water space 25a of the tank main body 25 was formed inside the filler neck part 41 arrange | positioned at the upper end of the 1st tank 21, a radiator cap can be easily carried out, without carrying out a complicated process. 43 can be tightly fixed to the open end 25e.
[0027]
Further, since the cross-sectional area is increased by forming the cooling water flow path 25c in the shape of an elongated circular arc in cross section, the flow amount of the cooling water 31 to the cooling water flow path 25c can be increased, and the expansion and contraction of the cooling water 31 can be achieved. Accordingly, the cooling water 31 can be quickly circulated between the cooling water space 25a and the reserve space 25b.
[0028]
Since the first tank 21 is made of an aluminum alloy, it is possible to prevent deformation of the opening 27a that opens at the upper end of the first tank 21 due to long-term indirect contact with the high-temperature, high-pressure cooling water 31. The cooling water 31 can be circulated between the cooling water space 25a and the reserve space 25b without causing malfunction.
[0029]
【The invention's effect】
In the radiator according to claim 1, since the first tank having the cooling water space, the reserve space, and the cooling water flow path is integrally formed by extrusion molding, the processing function at the time of expansion and contraction of the cooling water is provided in the first tank. The cooling water can be expanded and contracted reliably with a simple structure.
[0030]
Moreover, since the flow opening end of the cooling water flow path is formed inside the filler neck portion arranged at the upper end of the first tank, the cooling water flow path can be formed into a linear shape, and the first tank is extruded. Can be formed more easily.
In addition, since the opening end of the cooling water space is formed inside the filler neck located at the upper end of the first tank, the bottom of the radiator cap can be easily fixed tightly to the opening end without complicated processing. can do.
[0031]
In the radiator according to claim 2 , since the cooling water flow path is formed in an elongated cross-sectional shape and the cross-sectional area is increased, the flow amount of the cooling water to the cooling water flow path can be increased, and the cooling water can be expanded and contracted. In addition, the cooling water can be quickly circulated between the cooling water space and the reserve space.
In the radiator according to claim 3 , since the first tank is made of an aluminum alloy, it is possible to prevent deformation of the opening opening at the upper end of the first tank due to long-term indirect contact with high-temperature and high-pressure cooling water. The cooling water can be circulated between the cooling water space and the reserve space without causing malfunction.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing an embodiment of the present invention.
FIG. 2 is a cross-sectional view of FIG.
FIG. 3 is a cross-sectional view showing details of a main part of FIG. 1;
FIG. 4 is a cross-sectional view showing a normal flow state of cooling water.
FIG. 5 is a cross-sectional view showing a state in which cooling water flows from the cooling water space into the reserve space.
FIG. 6 is a cross-sectional view showing a state in which cooling water flows from the reserve space into the cooling water space.
FIG. 7 is a cross-sectional view showing a conventional radiator.
8 is an exploded perspective view of FIG. 7. FIG.
[Explanation of symbols]
21 1st tank 23 2nd tank 25a Cooling water space 25b Reserve space 25c Cooling water flow path 25e Open end 25f Flow opening end 37 Heat exchange part 39 Radiation fin 40 Tube 41 Filler neck part 43 Radiator cap 43a Bottom

Claims (3)

A long first tank (21) having a cooling water space (25a) and a second tank (23) are arranged to face each other at a predetermined interval, and the first tank (21) and the first tank (21) are arranged to face each other. In the radiator formed by disposing a heat exchange part (37) in which heat dissipating fins (39) and tubes (40) are alternately stacked between two tanks (23),
In the first tank (21), a reserve space (25b) is integrally formed adjacent to the cooling water space (25a) by extrusion, and the cooling water space (25a) and the reserve space (25b) are formed. ) Between the cooling water space (25a) and the reserve space (25b) by the extrusion along the longitudinal direction of the cooling water space (25a). Integrally formed, and at the upper end of the first tank (21), the opening end (25e) of the cooling water space (25a) and the flow opening end (25f) of the cooling water channel (25c) are exposed,
A filler neck portion (41) having a space for allowing cooling water to flow between the cooling water space (25a) and the cooling water flow channel (25c) is formed as the opening end (25e) of the cooling water space (25a). ) And the flow opening end (25f) of the cooling water flow path (25c), and the axial direction of the longitudinal direction is aligned with the opening end (25e) of the cooling water space (25a). A radiator, wherein a radiator cap (43) is disposed, and a bottom portion (43a) of the radiator cap (43) is closely fixed to an opening end (25e) of the cooling water space (25a) . The radiator according to claim 1.
A radiator characterized in that the cooling water channel (25c) is formed in an elongated shape in cross section . The radiator according to claim 1 or 2,
The radiator according to claim 1, wherein the first tank (21) is made of an aluminum alloy .

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