JP2509340Y2 - Heat exchanger - Google Patents

Description

FIELD OF THE INVENTION This invention relates to heat exchangers, in particular housing type heat exchangers.

2. Description of the Related Art For example, as shown in Japanese Utility Model Laid-Open No. 63-109865,
A well-known conventional housingless oil cooler has a core formed by laminating a large number of core plates by brazing, an upper plate provided above the core, and a cover provided below the core. . A cylindrical center bolt is inserted through the center of the core, upper plate and cover,
Above the upper plate, the oil filter is screwed to the threaded portion provided on the upper end of the center bolt. The lower end of the center bolt extending below the cover is screwed to the engine bracket. In order to prevent the core from being deformed by tightening the center bolt, a reinforcing member is provided inside the upper plate, and the center bolt is tightened via the reinforcing member.

In the oil cooler disclosed in the above publication, the inflow pipe and the outflow pipe through which the cooling water flows in and out are provided on the side wall of the cover, but due to the restrictions on the arrangement, the inflow pipe and the outflow pipe are parallel to the core axis. Since it is necessary to bend, an elbow-shaped curved pipe portion bent at a substantially right angle is used. However, since the curved pipe portion is bulky, the diameter cannot be increased so much, and it is not possible to secure a sufficient amount of cooling water to obtain the required heat exchange efficiency. In order to secure the required amount of cooling water, the height or diameter of the cover must be increased, which causes a problem of increasing the weight of the oil cooler as a whole. Further, since members such as a reinforcing member and a partition plate are required to improve the rigidity of the core against the compressive force of the center bolt, it is not possible to sufficiently reduce the weight and size of the oil cooler.

In order to solve the above-mentioned problem, an unknown oil cooler developed by the applicant of the present application will be described with reference to FIGS. 3 to 7.

The oil cooler shown in FIG. 3 and FIG.
The seat 40 fixed to one end (lower end) of the core 10 through the lowermost plate 43 fixed to the bottom of the core 10, and the core 10
It has a partition member (reinforcement ring) 50 fixed to the other end (upper end) thereof, and a housing 20 for housing the core 10 and the partition member 50. The core 10 has a plurality of plates 11 formed by stacking and brazing, and in the gap between the plates 11, an oil as a first fluid and a heat exchange chamber 15 for cooling water as a second fluid, 16 are alternately formed, and heat exchange is performed between the oil in the heat exchange chambers 15 and 16 and the cooling water. Two conduction paths 12, an oil inflow passage (first inflow passage) 14a, an oil outflow passage (first outflow passage) 14b, a cooling water inflow passage (second inflow passage) 13a, and a cooling water outflow passage (first). The second outflow passage) 13b is formed so as to penetrate the core 10.

In the housing 20 that houses the core 10 and the partition member 50,
A large number of ports 21 through which oil passes, and a cooling water inlet pipe 60
Is formed. Although not shown, the housing 20 is provided with an outflow pipe through which the cooling water is discharged similarly to the inflow pipe 60.

As shown in FIGS. 5 to 7, the partition member 50 arranged in the housing 20 is integrally formed in a circular shape by forging or lost wax precision casting, for example. Partition member 50
Is an outer peripheral wall 51, a central through hole 53, a boss portion 52 formed around the through hole 53, eight partition ribs 54 formed from the boss portion 52 toward the outer peripheral wall 51, and a partition wall. Intermediate chambers for oil (first intermediate chambers) 55a, 55b, 5 formed by the ribs 54
7. Cooling water intermediate chambers (second intermediate chambers) 56a and 56b are provided. Further, an annular inner protrusion 58 with which the flange portion 32 of the center bolt 30 is fitted in a liquid-tight manner is formed inside the boss portion 52.

A flat sheet 40 having an oil inlet 41 communicating with the conduction path 12 is attached to the lower portion of the core 10. The center bolt 30 is arranged so as to pass through the through holes 10a, 20a, 53 formed in the central portions of the core 10, the housing 20, and the partition member 50 and the outlet 42 of the core 10. Above the core 10, a screw part 31 (Fig. 6) of the center bolt 30 is provided.
An oil filter (not shown) is fixed to 31 by screw connection.

During the operation of the oil cooler, as shown in FIG. 3, the oil in the engine is introduced from the inlet 41 of the seat 40 through the passage 12 in the core 10 into the intermediate chamber 57 of the partition member 50. The oil in the intermediate chamber 57 is stored in the opening 57a of the intermediate chamber 57 and the housing 2.
After passing through the port 21 of 0, it is supplied to the inside of the oil filter fixed to the upper part of the oil slurries and purified. The oil purified in the oil filter passes through the inside of the center bolt 30 shown in FIG. 6 and is returned to the oil intermediate chamber 55a of the partition member 50 from the communication hole 33 formed in the center bolt 30. The oil in the oil intermediate chamber 55a flows from the opening 14c of the core 10 into the oil inflow passage 14a in the core 10, and then flows in the heat exchange chamber 15 of the core 10 in the circumferential direction around the center bolt 30. The oil outflow passage 14b is caused to flow into the oil intermediate chamber 55b. The oil in the heat exchange chamber 15 exchanges heat with the cooling water passing through the heat exchange chamber 16. Then, the oil in the oil intermediate chamber 55b goes from the center hole 10a of the core 10 through the hole 34 of the center bolt 30 and the center bolt 30 to the main gallery.

The cooling water flows from the inflow pipe 60 to the cooling water intermediate chamber 56 of the partition member 50.
a, and enters the cooling water inflow passage 13 from the cooling water intermediate chamber 56a.
It is supplied to the heat exchange chamber 16 from a (Fig. 4). Heat exchange room 16
The cooling water inside flows in the circumferential direction around the center bolt 30 and is discharged from the cooling water outflow passage 13b through the cooling water intermediate chamber 56b to the outside from an unillustrated outflow pipe. The cooling water in the heat exchange chamber 16 absorbs the heat of the oil in the heat exchange chamber 15.

In the conventional example shown in FIGS. 3 to 7, when the core 10 is tightened by the center bolt 30 during assembly, the tightening force of the center bolt 30 is transmitted to the core 10 via the partition member 50. Further, since the partition member 50 simultaneously exhibits the action of the cover of the conventional reinforcing member and forms the first fluid chamber and the second fluid chamber, it is not necessary to separately provide the cover. Therefore, the height and weight of the entire heat exchanger including the core can be significantly reduced.

Problems to be Solved by the Invention However, the housing used in the conventional oil cooler
Since the inflow pipe 60 and the outflow pipe (not shown) are attached to the portion 20 after deep drawing, the overhang portion must be formed. Therefore, it becomes difficult to give the manufactured housing 20 an outer shape with high circularity, and there is a possibility that the housing 20 cannot be fitted in an appropriate condition in the annular recess formed in the outer peripheral portion of the plate 43. Further, there is a drawback that the brazing of the annular recess of the plate 43 becomes insufficient and the liquid tightness performance is deteriorated.

It is an object of the present invention to provide a heat exchanger that can eliminate the above-mentioned drawbacks by integrally forming a housing and a sheet by forging or casting.

Means for Solving the Problems A heat exchanger according to the present invention comprises a first fluid and a second fluid which respectively flow into a plurality of heat exchange chambers (15, 16) formed by sequentially laminating a plurality of plates (11). (10) for exchanging heat with the fluid, a plurality of first intermediate chambers (55a, 55b) through which the first fluid passes, and a plurality of second intermediate chambers (56a, 56b) through which the second fluid passes. ) And a partition member (50) fixed to the end of the core (10) and an inlet (7) into which the first fluid flows.
3) and an outlet (78) through which the first fluid flows out, and an inflow pipe (60) through which the second fluid flows in and an outflow pipe (61) through which the second fluid flows out are side wall parts (72). A housing (70) connected to the core (10) and accommodating the core (10) and the partition member (50) to form a second fluid passage, and the partition member (50).
And the through holes (53, 10) formed in the central portions of the core (10).
a) and a center bolt (30) arranged in the outlet (78) formed in the central part of the housing (70) and fixing the heat exchanger, and the first bolt in the heat exchange chamber (15) is provided. The fluid exchanges heat with the second fluid passing through the heat exchange chamber (16).

The housing (70) includes a plate-shaped seat portion (71) having a pedestal portion (74) to which the core (10) is fixed, and a side wall portion (72) integrally formed with the seat portion (71). , Pedestal part (7
An annular recess (7) formed between the side wall (72) and the side wall (72).
5) and are provided. Inside the annular recess (75) with the annular flange (43a) provided on the outer periphery of the lowermost plate (43) forming the core (10) abutting the outer peripheral wall (74a) of the pedestal (74). Extend to.

The first fluid flowing in from the inflow port (73) of the housing (70) is conducted to the opening (57a) of the partition member (50) through the conduction path (12) of the core (10). Center bolt (3
The first fluid flowing in from the communication hole (33) formed in (0) passes through the first intermediate chamber (55a) of the partition member (50) and the first inflow passage (14a) of the core (10). Heat exchange room (1
5) and is supplied to the center bolt (3) in the heat exchange chamber (15).
0) as a center of flow, and the first outflow passageway (14b), the other first intermediate chamber (55b) of the partition member (50), and the core (1).
It flows out through the through hole (10a) of (0) from the outflow port (78). The second fluid flowing from the inflow pipe (60) is supplied to the second intermediate chamber (56a) of the partition member (50) and the core (10).
Is supplied to the heat exchange chamber (16) through the second inflow passage (13a), flows in the heat exchange chamber (16) in the circumferential direction around the center bolt (30), and then flows into the second outflow passage (13b). And the outflow pipe (6) through the other second intermediate chamber (56b) of the partition member (50).
It leaks out from 1).

In the heat exchanger according to the present invention, the seat portion (71) and the side wall portion (72) of the housing (70) are integrally formed,
When the second fluid is supplied into the core (10) from the inflow pipe (60) connected to the side wall portion (72), the second fluid does not leak from the housing (70). Further, since the housing (70) can be formed into an annular shape with high dimensional accuracy and little dimensional error in manufacturing by forging or casting, the inflow pipe (6) to the side wall part (72) can be formed.
0) and the outflow pipe (61) can be easily installed, and the side wall (7
The liquid-tightness of each connection between the 2) and the inflow pipe (60) and the outflow pipe (61) does not deteriorate. In this case, it is possible to form the connecting portion to be particularly thick and improve the mechanical strength and liquid tightness of the connecting portion. Furthermore, since the housing (70) is formed thick, it is not necessary to separately provide a seat that has been conventionally used, and a high resistance force against the compression force of the center bolt (30) at the time of assembly is generated, so that the core The deformation of (10) can be prevented. In addition, the brazing material is accumulated in the annular concave portion (75), and when the core (10) is heated in the heating furnace, the brazing material is accumulated in the annular concave portion (75), so that brazing failure does not occur.

Embodiment An embodiment of the heat exchanger according to the present invention will be described below with reference to FIGS. 1 and 2. In these drawings, FIG.
The same parts as those shown in FIG. 7 are designated by the same reference numerals and the description thereof will be omitted. Further, in FIG. 1, the center bolt 30 is omitted and the cell 10 is shown in a simplified manner.

The housing 70 according to the present invention has a relatively thick plate-like seat portion 71 and a side wall portion 72 integrally formed with the seat portion 71. The housing 70 is integrally formed by forging or casting. The seat portion 71 of the housing 70 has an inlet port 73 through which the oil as the first fluid flowing through the core 10 passes.
Also, a pedestal portion 74 to which the core 10 is fixed is formed. Inlet
73 is the same as the oil inlet 41 in FIG. An annular recess 75 is formed between the pedestal portion 74 and the side wall portion 72. The inner wall 72a of the side wall portion 72 and the outer peripheral wall 74a of the pedestal portion 74 are formed in a taper shape of about 5/100 because they are released from the mold during forging or casting. The bottom plate 43 that constitutes the core 10
An annular flange portion 43a provided on the outer periphery of the ring extends in the annular recess 75 in contact with the outer peripheral wall 74a of the pedestal portion 74. Further, the housing 70 has an opening 77 formed in the side wall 72 formed to be relatively thick. The side wall 72 of the housing 70 is connected with an inflow pipe 60 into which cooling water as a second fluid flows and an outflow pipe 61 from which cooling water flows out. The end of the inflow pipe 60 is brazed to the opening 77. The same applies to the outflow pipe 61.

The oil flowing from the inlet 73 of the housing 70 is
It conducts to the opening 57a of the partition member 50 through the conduction path 12 of 10. The oil that flows in from the communication hole 33 formed in the center bolt 30 is supplied to the heat exchange chamber 15 through one of the oil intermediate chambers 55a of the partition member 50 and the oil inflow passage 14a of the core 10, and is then supplied to the heat exchange chamber 15. It flows in the circumferential direction around the center bolt 30 in 15 and flows out from the outlet 78 through the oil outflow passage 14b, the other oil intermediate chamber 55b of the partition member 50 and the through hole 10a of the core 10. .

The cooling water flowing from the inflow pipe 60 is supplied to the heat exchange chamber 16 through one of the cooling water intermediate chambers 56a of the partitioning member 50 and the cooling water inflow passage 13a of the core 10, and is supplied to the heat exchange chamber 16 at the center. Flows in the circumferential direction around the bolt 30, and the cooling water outflow passage 13
It flows out from the outflow pipe 61 to the outside through the cooling water intermediate chamber 56b of the b and the partition member 50.

When assembling the heat exchanger according to the present invention, the core 10 is housed in the housing 70 together with the brazing material as shown.
Further, the ends of the inflow pipe 60 and the outflow pipe 61 are attached to the opening 77 and the opening (not shown) of the housing 70 via a brazing material. Since the side wall 72 of the housing 70 is formed into a highly accurate circle by forging or casting, there are few dimensional errors in manufacturing,
The inflow pipe 60 and the outflow pipe 61 can be easily attached to the side wall portion 72. After this, by heating in the heating furnace,
A predetermined joining portion is brazed by the brazing material.

When using the completed heat exchanger, oil is supplied into the core 10 through the inlet 73 formed in the seat portion 71 of the housing 70, and the core 10 is supplied from the inflow pipe 60 connected to the side wall portion 72 of the housing 70. Cooling water is supplied to the inside of the core 10 to perform heat exchange between the oil and the cooling water. In this case, since the seat portion 71 and the side wall portion 72 of the housing 70 are integrally formed, the fluid does not leak from the heat exchanger.

In the present invention, since the housing 70 can be formed into an annular shape with high dimensional accuracy and little dimensional error in manufacturing by forging or casting, it becomes easy to attach the inflow pipe 60 and the outflow pipe 61 to the side wall part 72 and the side wall part 72. The liquid-tightness of each connecting portion with the inflow pipe 60 and the outflow pipe 61 does not deteriorate. In this case, it is possible to form the connecting portion to be particularly thick and improve the mechanical strength and liquid tightness of the connecting portion. Furthermore, since the housing 70 is formed thick, it is not necessary to separately provide a seat that has been conventionally used, and a high resistance force is generated against the compression force of the center bolt 30 at the time of assembly, so that the core 10 is not deformed. It can be prevented.

In addition, since the wax pool is formed in the annular recess 75,
When the core 10 is heated in the heating furnace, the brazing material is an annular recess
It collects in 75 and does not cause brazing failure. Further, when the core 10 is arranged on the seat portion 71, the outer peripheral wall 74a of the pedestal portion 74 is
There is an advantage that the central axes of the plate 11 and the seat portion 71 are automatically aligned with each other by the centering action of the taper surface.

This invention can be modified in various ways. For example, although the housing type heat exchanger used in combination with the oil filter is shown in the above embodiment, the present invention can be applied to other types of heat exchangers.

Effect of the Invention As described above, the heat exchanger according to the present invention can manufacture the seat portion and the side wall portion of the housing integrally and with high accuracy, which facilitates the assembly, and also causes poor brazing or liquid tightness. Can be avoided.

[Brief description of drawings]

FIG. 1 shows a heat exchanger according to the present invention, which is taken along the line AA of FIG.
FIG. 2 is a plan view, FIG. 3 is a cross-sectional view of a conventional heat exchanger showing an inflow passage, FIG. 4 is another cross-sectional view showing a cooling water passage, and FIG. 5 is a partition member. Of FIG. 6, FIG. 6 is a sectional view taken along the line AA of FIG. 5, and FIG. 7 is a sectional view of FIG.
It is sectional drawing which follows the line. 10 …… Core, 11 …… Plate, 30 …… Center bolt,
43 …… bottom plate, 43a …… annular flange, 50
...... Partition member, 60 …… Inflow pipe, 61 …… Outflow pipe, 70 …… Housing, 71 …… Seat part, 72 …… Side wall part, 73 …… Inlet port, 74 …… Pedestal part, 74 a …… Outer periphery Wall, 75 ... annular recess

Claims (2)

(57) [Scope of utility model registration request] 1. Heat exchange is performed between a first fluid and a second fluid respectively flowing into a plurality of heat exchange chambers (15, 16) formed by sequentially laminating a plurality of plates (11). Core (10)
And a plurality of first intermediate chambers (55a, 55b) through which the first fluid passes and a plurality of second intermediate chambers (56a, 56b) through which the second fluid passes and are fixed to the ends of the core (10). Partition members (50)
And an inlet (73) into which the first fluid flows and an outlet (78) from which the first fluid flows out, and an inflow pipe (60) into which the second fluid flows and a second fluid flow out. An outlet pipe (61) for connecting to the side wall portion (72) and housing the core (10) and the partition member (50) to form a second fluid passage, and the partition member (50). And a center bolt arranged in the through hole (53, 10a) formed in each central part of the core (10) and the outlet (78) formed in the central part of the housing (70) and for fixing the heat exchanger. (30), and the first fluid in the heat exchange chamber (15) is a heat exchange chamber (16).
In the heat exchanger for exchanging heat with the second fluid passing through, the housing (70) includes a plate-shaped seat portion (71) having a pedestal portion (74) to which the core (10) is fixed, and a seat (71). The side wall part (72) formed integrally with the part (71) and the pedestal part (7
An annular recess (7) formed between the side wall (72) and the side wall (72).
5) and an annular flange portion (43a) provided on the outer periphery of the lowermost plate (43) constituting the core (10) is in contact with the outer peripheral wall (74a) of the pedestal portion (74). A heat exchanger characterized by extending into the recess (75) of the. 2. The first fluid flowing from the inflow port (73) of the housing (70) is conducted to the opening (57a) of the partition member (50) through the conduction path (12) of the core (10). Then, the first fluid that flows in from the communication hole (33) formed in the center bolt (30) flows into the first intermediate chamber (55a) of the partition member (50) and the first inflow passage of the core (10). It is supplied to the heat exchange chamber (15) through (14a) and flows in the heat exchange chamber (15) in the circumferential direction around the center bolt (30), and then the first outflow passage (14b) and the partition member (50). ) The other first intermediate chamber (55b)
And the outlet (78) through the through hole (10a) of the core (10)
The second fluid that flows out from the inflow pipe (60) flows out from the partition member (5
0) is supplied to the heat exchange chamber (16) through one of the second intermediate chamber (56a) and the second inflow passage (13a) of the core (10), and the center bolt (30) is supplied in the heat exchange chamber (16). ) In the circumferential direction, and flows out from the outflow pipe (61) to the outside through the second outflow passageway (13b) and the other second intermediate chamber (56b) of the partition member (50). The heat exchanger described.