JPH087263Y2 - Heat exchanger - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a heat exchanger having a fluid leakage structure as a housing type oil cooler for an internal combustion engine, which is disposed adjacent to an oil filter.

2. Description of the Related Art For example, Japanese Patent Publication No. Sho 55-48238 describes a heat exchanger in which a heat exchanger and an oil filter are attached to one connector pipe to continuously cool and pass lubricating oil in a small space. Has been done.

This heat exchanger has a structure in which a large number of core plates are stacked to form a core, oil chambers and cooling water chambers are alternately formed between the core plates, and the cores are mainly provided in the housing. In the case of this housing type, a water supply part and a drain part for supplying and discharging cooling water can be provided on the side part of the housing, so that the heat exchange efficiency can be improved. The above heat exchanger is attached to the engine bracket by a connector pipe, and then an oil filter is connected through the connector pipe. Also, in order to prevent the leakage of lubricating oil, the oil filter is screwed into the connector pipe so that the oil filter is in close contact with the heat exchanger in advance, so the heat exchanger needs to have compressive strength in the height direction. Become. In this regard, in the case of housing-type heat exchangers, the housing ensures rigidity against compression.

As an example of the housing-type oil cooler, the heat exchanger previously proposed by the applicant of the present invention is not known.
Shown in FIGS.

This heat exchanger includes a core 1 formed by laminating a large number of core plates 2 by brazing, a housing 3 that accommodates the core 1, and a lower cover 4 that is coupled to a lower portion of the core 1.
And an upper cover 5 coupled to the upper part. Above the core 1, an oil filter is connected via a connector pipe (not shown) inserted into the heat exchanger. A cooling water supply pipe 6 and a drain pipe 7 are connected to the housing 3. A partition plate 8 is provided in the housing 3 at the upper end of the core 1 in the figure. This partition plate 8
Is provided with a lubricating oil-lubricating oil partition and a lubricating oil-cooling water partition. Further, the partition plate 8 is formed with a folded-back portion 8a which is bent outward from the upper periphery and is in contact with the inner surface of the housing 3. That is, as shown in FIG. 8, the contact of the folded portion 8a with the housing 3 forms a lubricating oil / lubricating oil partition and a lubricating oil / cooling water partition, which are isolated from each other.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention By the way, in the case of the housing type heat exchanger proposed by the applicant of the present invention shown in FIGS. 6 to 8, the partition plate 8 is provided with the folded-back portion 8a, and the folded portion 8a is formed in the housing. Although it has a structure in which it abuts against the inner surface of 3, there is still a problem that the sealing property at this abutting part is insufficient and the cooling water leaks from this to the outside of the housing 3 to reduce the heat exchange efficiency. ing.

The present invention has been made to solve these problems, and an object thereof is to provide a heat exchanger that enhances the sealing property of cooling water and does not reduce heat exchange efficiency.

Means for Solving the Problems The heat exchanger of the present invention comprises a housing, a core housed in the housing and forming a heat exchange chamber for exchanging heat between the first fluid and the second fluid, In a heat exchanger having a partition plate that is connected to an end of a core in a housing and separates an inflow outer chamber and an outflow outer chamber of a second fluid, the partition plate is substantially parallel to the core axis from the end of the core. A peripheral side wall standing upright is provided, and the folded back seal part is partially bent outward from the tip of the peripheral side wall so that it protrudes by a length substantially equal to the standing length of the peripheral side wall, and the folded back seal part is closely attached to the inner surface of the housing. It has a structure.

Action When the second fluid flows into the core and then flows out of the core, the folded-back seal portion of the partition plate is in close contact with the inner surface of the housing, so that the leakage of the second fluid from here is prevented.

Embodiment An embodiment of the heat exchanger according to the present invention will be described below with reference to FIGS. 1 and 2.

The core 11 which is the main body of the heat exchanger 10 is formed by alternately laminating a large number of core plates and brazed together, and a heat exchange chamber for performing heat exchange between the first and second fluids between the core plates 15. Is formed. In the case of an automobile, the first fluid here is lubricating oil and the second fluid is cooling water. A lower bar 13 is coupled to the lower portion of the core 11 and an upper cover 19 is coupled to the upper portion. A connector pipe 14 is inserted through the center of the heat exchanger 10 having such a structure, and an oil filter is arranged adjacent to the upper end of the connector pipe 14 in the drawing.

That is, the core 11 is a laminated body including a large number of core plates 15, heat exchange chambers 17 and 18 for lubricating oil and cooling water are formed between the core plates 15, and oil chambers 20 and cooling chambers 21 are alternately formed. To be done. These two chambers are connected to each other via one heat exchange chamber 17. An inflow outer chamber 22 and an outflow outer chamber 23, which are separated from each other, are formed between the core 11 and the housing 12, as shown in FIG. Inflow outer chamber 22 and outflow outer chamber 23
Is an oil chamber 20 and a second outflow chamber provided in the core 11 in parallel therewith and connected to each other via the other heat exchange chamber 18.
24 and the second outflow chamber 25. The inflow outer chamber 22 and the outflow outer chamber 23 are the second inflow chamber 24, the other heat exchange chamber 18,
And via a second outflow chamber 25. A water supply pipe 26 and a drain pipe 27 for cooling water are connected to the inflow outer chamber 22 and the outflow outer chamber 23 formed between the core 11 and the housing 12, respectively. In addition, the core 11 has a lower cover 13
An oil chamber port 30 is provided to supply lubricating oil from. core
A reinforcing member 31 that bears a buckling load when the connector pipe 14 is tightened is fixed between the housing 11 and the housing 12.

In the space between the upper part of the core 11 and the housing 12, as shown in FIGS. 4 (a) and 4 (b), a plate-shaped partition plate 40
Are interposed so as to contact and surround the outer periphery of the reinforcing member 31. The partition plate 40 has a peripheral side wall 41 forming a lubricating oil-lubricating oil partition part and a peripheral side wall 42 forming a lubricating oil-cooling water partition part, and the inflow outside described above by these peripheral side walls 41, 42. Chamber 22 and outflow outer chamber 23 are formed isolated from each other. Further, as shown in the figure, a peripheral side wall 42 (see a portion 8a in FIG. 8) that abuts the inner surface of the housing 12 is provided with a seal fold portion 42a that is bent and formed outward, and the seal fold portion 42a is It is formed by bending downward so as to be approximately equal to the standing length of the peripheral side wall 42.

In the above-mentioned configuration, the lubricating oil which is the first fluid supplied from the outside by the oil pump is sent from the introduction passage 13a of the lower cover 13 through the oil chamber port 30 to the core 11 to the oil filter. The lubricating oil purified by the oil filter and returned to the connector pipe 14 flows from the through hole 14a to the window hole 14b.
And flows into the oil chamber 31a in the reinforcing member 31. Further, the lubricating oil flows from the oil chamber 31a into the oil chamber 20 in the core 11 and then flows into the one heat exchange chamber 17 from there. In this one heat exchange chamber 17, the lubricating oil circulates in either the clockwise direction or the counterclockwise direction around the connector pipe 14, and from the one heat exchange chamber 17 to the first outflow chamber 21 and the reinforcing member 31. Through the oil chamber 31b and the window hole 14c of the connector pipe 14
Main gallery of engine block from a (not shown)
Spill to. A partition wall 14d is formed in the flow hole 14a of the connector pipe 14 midway.

On the other hand, the cooling water as the second fluid passes from the water supply pipe 26 through the inflow outer chamber 22 and the second inflow chamber 24 and flows into the other heat exchange chamber 18. Here, the cooling water exchanges heat with the lubricating oil that circulates in the one heat exchange chamber 17 at a high temperature to cool the lubricating oil. The cooling water whose temperature has risen due to this heat exchange is discharged from the other heat exchange chamber 18 through the second outflow chamber 25, the outflow outer chamber 23, and the drain pipe 27.

Further, as shown in FIGS. 4A and 4B, in the peripheral side walls 41 and 42 forming the lubricating oil-cooling water partition of the partition plate 40, one peripheral side wall 42 abutting against the inner surface of the housing 12 is used. Since the folded-back seal portion 42 bent outward is in close contact with the inner surface of the housing 12 at a long distance, leakage of cooling water from this portion is prevented, and the sealing performance is maintained.

As described above, the lubricating oil flows into the core 11 from the first inflow chamber 20, passes through the one heat exchange chamber 17 and the first outflow chamber 21, and flows out of the core 11. Further, the cooling water flows into the core 11 from the inflow outside chamber 22 and then flows into the other heat exchange chamber 18 through the second inflow chamber 24. In the other heat exchange chamber 18, the cooling water exchanges heat with the lubricating oil flowing into the one heat exchange chamber 17. Then, the cooling water flows from the other heat exchange chamber 18 through the second outflow chamber 25 and the outflow outer chamber 23 and out of the core 11.

Effect of the Invention As described above, in the heat exchanger according to the present invention, the side wall of the partition plate joined to the end of the core has the seal portion folded back to the outside and closely contacting the inner surface of the housing for a long distance. Therefore, the leakage of the cooling water from the contact surface with the housing is prevented as in the conventional case, and there is an effect that the required sealing property is secured and the decrease in the efficiency of heat exchange is suppressed.

[Brief description of drawings]

1 to 5 show an embodiment of a heat exchanger according to the present invention, and FIGS. 1 to 3 show an assembly sectional view by a cooling water circulation section, an assembly sectional view by a lubricating oil circulation section, and an assembly sectional view,
4 (a) and 4 (b) are front and side views of the partition plate, which is a main part, and FIG. 5 is an external view. FIG. 6 to FIG. 8 show a sectional view of a housing type oil cooler previously proposed by the applicant of the present application, and a sectional view of the assembly by a cooling water circulation section and a lubricating oil circulation section, respectively, and a plan view. 10 …… Heat exchanger, 11 …… Core, 15 …… Core plate, 1
7, 18 …… Heat exchange room, 26, 27 …… Cooling water supply pipe, drain pipe, 31 …… Reinforcing member, 40 …… Partition plate, 41, 42 ……
Peripheral side wall, 42a ... Folded seal part.

Claims (1)

[Scope of utility model registration request] 1. A housing, a core housed in the housing and forming a heat exchange chamber for exchanging heat between a first fluid and a second fluid, and coupled to an end of the core in the housing. In a heat exchanger having a partition plate for separating the second fluid inflow outer chamber and the second fluid outflow chamber, the partition plate is provided with a peripheral side wall standing upright from the end of the core substantially parallel to the core axis. The heat exchanger characterized in that the fold-back seal part is partially bent outward from the tip of the ridge so that the fold-back seal part sticks to the inner surface of the housing so as to protrude by a length substantially equal to the standing length of the peripheral side wall. .