JPH0539337Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The invention relates to a heat exchanger, particularly a housing-type heat exchanger that is placed adjacent to an oil filter and has a high heat exchange efficiency.

Conventional technology For example, Japanese Patent Publication No. 55-48238 discloses a heat exchanger that can continuously cool and filter oil in a small space by attaching a heat exchanger and an oil filter to one connector pipe. is disclosed.

The conventional heat exchanger has a housing-type structure in which a plurality of plates are provided in a housing, and oil chambers and water chambers are alternately formed between each plate. This housing-type structure can provide a supply section and a drainage section for supplying and discharging water on the sides of the housing, so that good heat exchange efficiency can be obtained. The aforementioned heat exchanger is attached to the engine bracket using a connector pipe, and then an oil filter is attached to the connector pipe. In this case, in order to prevent oil leakage, screw the oil filter into the connector pipe in advance so that it is in close contact with the heat exchanger.
Heat exchangers require compressive strength in the height direction. In this respect, the housing type structure provides greater buckling strength due to the annularly shaped housing.

Problems to be Solved by the Invention By the way, the housing type heat exchanger has a complicated structure and requires many man-hours in the manufacturing process, so it has the drawback of being expensive to manufacture. Further, since the core is formed by bending the plate outward in the thickness direction and radial direction, the core has a drawback that it becomes larger in the thickness direction or outward in the radial direction.

Therefore, it is conceivable to use a housingless type heat exchanger that does not use a housing. A housing-less type heat exchanger is known, for example, as shown in Japanese Utility Model Application Publication No. 134755/1983, which was previously filed by the present applicant. However, a practical housing-less heat exchanger has not been proposed as a filter-integrated heat exchanger that is attached to a single connector pipe together with an oil filter. The reason for this is that housingless heat exchangers, which are manufactured by laminating and brazing many plates, cannot supply a sufficient amount of cooling water to the heat exchange chamber formed between the plates. This is because heat exchange efficiency cannot be obtained.

Furthermore, in conventional housingless heat exchangers, pipes for distributing cooling water must be connected to the cover, which imposes layout limitations. Furthermore, increasing the flow rate of cooling water results in an increase in the pipe diameter and an increase in the size of the cover, resulting in the disadvantage that the heat exchanger cannot be made smaller.

Therefore, the object of this invention is to eliminate the above-mentioned drawbacks, provide a heat exchanger that is small and easily manufactured, and has high heat exchange efficiency.

Means for Solving the Problems The heat exchanger of this invention has a housing and an annular core housed within the housing. The core is formed by laminating a large number of plates, and includes at least two types of heat exchange chambers formed between each plate, and a first inflow chamber and a first outflow chamber formed parallel to each other along the thickness direction. has. The first inflow chamber and the first outflow chamber are communicated with each other via one heat exchange chamber, and a second inflow chamber and a second outflow chamber are formed between the core and the housing, which are separated from each other. Ru. The other heat exchange chamber of the core has a radially formed inlet opening and an outlet opening, and the second inlet chamber and the second outlet chamber have an inlet opening, the other heat exchange chamber and an outlet opening. They communicate with each other through the department.

Effect The first fluid flows into the core from the first inflow chamber,
It exits the core through one heat exchange chamber and a first outflow chamber. Further, after the second fluid flows into the core from the second inlet chamber, it flows through the inlet opening to the other heat exchange chamber. In the other heat exchange chamber, the second fluid exchanges heat with the first fluid that has flowed into one heat exchange chamber. The second fluid then exits the core from the other heat exchange chamber through the outflow opening and the second outflow chamber.

The second fluid flows into the core from the second inlet chamber provided on the side of the core through the inlet opening, and flows out of the core from the second outlet chamber through the outlet opening, so that flow resistance is small. In other words, the inlet opening and the outlet opening have the effect of reducing the flow resistance of the second fluid and improving the heat exchange efficiency.

Embodiment Hereinafter, an embodiment of this invention will be described with reference to FIGS. 1 to 8.

As shown in FIGS. 1 to 3, the heat exchanger 10 of this invention includes an annular core 11 formed by laminating and brazing a large number of plates, a housing 12 that accommodates the core 11, It has a cover 13 fixed to the lower part of the core 11. At the top of the core 11 is a connector pipe 14 to which a heat exchanger 10 is attached.
An oil filter (not shown) is fixed to.

The core 11 is formed by laminating a large number of plates 15, 16 alternately, and has at least two types of heat exchange chambers 17, 1 formed between each plate 15, 16.
8 and a first inflow chamber 20 and a first outflow chamber 21 formed parallel to each other along the thickness direction (FIG. 2). First inflow chamber 20 and first outflow chamber 21
are communicated with each other via one heat exchange chamber 17. A second inflow chamber 22 and a second outflow chamber 23 are separated from each other between the core 11 and the housing 12.
is formed. The other heat exchange chamber 18 of the core 11 has a radially formed inlet opening 24 and an outlet opening 25 . Inflow opening 24 and outflow opening 2
Reference numeral 5 designates a portion of the tapered portion of the outer periphery of the plate 15, I6 as a cutout, which is formed as an oval opening. Second inflow chamber 22 and second outflow chamber 23
are in communication with each other via an inflow opening 24 , the other heat exchange chamber 18 and an outflow opening 25 .

5 and 7 are plan views showing examples of plates 15 and 16 constituting the core 11, and FIGS. 6 and 8 are side views of FIGS. 5 and 7, respectively. As shown in FIG. 4, the core 11 is provided with a supply passage 30 (FIG. 4) that is connected from the cover 13 adjacent to the oil filter and supplies oil as a first fluid to the oil filter. The supply passage 30 is provided with coaxial annular projections 15j and 16j on the plates 15 and 16, respectively.
A substantially bowl-shaped reinforcing member 31 is fixed between the core 11 and the housing 12 to resist the buckling load when the connector pipe 14 is tightened. plate 15
has a center hole 15 through which the connector pipe 14 is inserted.
a, holes 15b forming four supply passages 30, holes 15c, 15d forming first inflow chamber 20 and first outflow chamber 21, respectively, and communication passages 15e, 1
5f. Similarly, the plate 16 includes a center hole 16a through which the connector pipe 14 is inserted, holes 16b forming the four supply passages 30, and holes 16c and 16d forming the first inflow chamber 20 and the first outflow chamber 21, respectively. and communication passages 16e and 16f. The plates 15 and 16 have notches 15g and 15h and 16g and 16h, respectively.

The notches 15g and 16g constitute an inflow opening 24, and the notches 15h and 16h constitute an outflow opening 25.
Configure. As mentioned above, the center holes 15a and 16
Annular bent portions 15i and 16i are provided around the holes 15b and 16b, and annular projections 15 are provided around the holes 15b and 16b.
j and 16j are provided. In addition, communication passage 15e
and 15f and holes 16c and 16d have annular protrusions 15.
k, 15l and 16m and 16n are provided. Bent portions 15m and 15n and 16k and 16l are provided in the holes 15c and 15d and the annular passages 16c and 16d. Further, each plate 15, 16 is provided with a large number of embosses 15o, 16o for automatically stirring the first fluid or the second fluid. Notch part 1
5h and 16h have bent portions 15p bent downward,
16p are formed respectively.

The only difference between the plates 15 and 16 is that they have notches 15g, 15h and 16g, 16h alternately spaced apart by 90 degrees. When forming the core 11, the vertically adjacent plates 15 and 16 are alternately stacked and soldered together. In this case, plate 16
When plate 15 is placed on top, the gap formed between these plates 15 and 16 is small. That is, one heat exchange chamber for oil as the first fluid is formed between the plates 15 and 16, and even if there are notches 15g and 15h, the bent portion 15p
This closes the inflow opening 24 and the outflow opening 25.

On the other hand, plate 16 is placed on top of plate 15.
When stacked, a relatively large gap is formed due to the fitting between the annular projection 15l and the bent portion 16l.
Therefore, an inflow opening 24 and an outflow opening 25 are formed by the notches 16g and 16h. At this time, another heat exchange chamber for the cooling water as the second fluid is formed between the plates 15 and 16.
Therefore, the notches 16g and 16h are the bent portions 16.
Not closed by p.

An inlet pipe 26 and an outlet pipe 27 are connected to a second inflow chamber 22 and a second outflow chamber 23 formed between the core 11 and the housing 12, respectively. Also,
The second inflow chamber 22 and the second outflow chamber 23 are separated from each other by a pair of recesses 32 and 33 bent so as to contact the outer periphery of the core 11 of the housing 12.

In the upper configuration, oil supplied from the outside by an oil pump is sent from the oil supply chamber (not shown) of the cover 13 through the supply passage 30 (FIG. 4) and from the core 11 to the oil filter. The oil purified from the oil filter and returned to the center hole 1 of the connector pipe 14 as shown in FIG.
4a and flows into the communication passage 31a formed by the reinforcing member 31 through the horizontal hole 14b. Furthermore, the oil flows into the first inflow chamber 20 from the communication passage 31a, and from there flows into one of the heat exchange chambers 17. In one heat exchange chamber 17 of the core 11, the oil rotates in either a clockwise or counterclockwise direction around the connector pipe 14, and then the oil flows from one heat exchange chamber 17 to the second heat exchange chamber 17. 1 outflow chamber 21, cover 1
3 outlet chamber 13a, horizontal hole 1 of connector pipe 14
4c and flows out from the center hole 14a into the main gear gallery (not shown) of the engine block. In addition,
A closing member 14d is fixed to the center hole 14a of the connector pipe 14.

On the other hand, the cooling water as the second fluid flows through the inlet pipe 26.
From there, it flows through the second inflow chamber 22 and the inflow opening 24 into the other heat exchange chamber 18 . Here, the cooling water cools the oil in one of the heat exchange chambers 17 to perform heat exchange. The heated cooling water passes through the outflow opening 25 from the other heat exchange chamber 18 to the second outflow chamber 2.
3 to the outlet pipe 27.

As mentioned above, oil as the first fluid enters the core 11 from the first inflow chamber 20 and exits the core 11 through one of the heat exchange chambers 17 and the first outflow chamber 21 . In addition, the cooling water as the second fluid flows into the core 11 from the second inflow chamber 22 and then flows into the heat exchanger 18 through the inflow opening 24 . In the other heat exchange chamber 18, the cooling water exchanges heat with the oil that has flowed into one heat exchange chamber 17. Thereafter, the cooling water passes through the outflow opening 25 and the second outflow chamber 23 from the other heat exchange chamber 18 to the core 1.
Flows from 1.

In this embodiment, the second fluid flows into the core 11 from a second inflow chamber 22 provided on the side of the core 11 through an inflow opening 24 and into a second outflow chamber 23. from the core 1 through the outflow opening 25
1, flow resistance is small because it flows outside. That is,
The inflow opening 24 and the outflow opening 25 serve to reduce the flow resistance of the second fluid and improve heat exchange efficiency.

Therefore, it will be understood that this invention can be manufactured by alternately stacking the plates 15 and 16, and can also ensure a large flow rate of cooling water as the second fluid.

In this example, since a large number of plates having tapered outer circumferential portions are laminated, the plates do not increase in size outward in the thickness direction or radial direction.
As a result, the core can be manufactured in a smaller size. Furthermore, the plate itself is easy to form. Furthermore, since the cooling water as the second fluid comes into contact with almost the entire outer surface of the core, the heat exchange efficiency is further improved compared to the conventional technology.

The above embodiments of the invention can be modified. For example, the communication passages 15e, 15f, 16e, 1 through which cooling water as the second fluid flows in the thickness direction of the core.
6f may not be formed. In this case, since there is no need to provide the annular projections 15k and 15l and the bent portions 16k and 16l, manufacturing becomes easier, and at the same time, it is possible to increase the adjacent area of the heat exchange chamber and improve heat exchange efficiency. Become.

On the other hand, the holes 15b and 16b may be closed and the communication passages 15e, 15f, 16e, and 16f may be used as supply passages for oil as the first fluid. In any case, it is possible to expand the heat transfer area of the heat exchange chamber.

Effects of the Invention The heat exchanger of this invention reduces flow resistance and significantly improves heat exchange efficiency by providing an inflow opening and an outflow opening in the core.
Furthermore, the flow rate of the second fluid can be increased to improve heat exchange efficiency.

The heat exchanger can be easily manufactured by stacking plates, and since pipes for distributing cooling water can be connected to any position on the housing, restrictions on pipe installation are eliminated. Furthermore, by forming a flow path for the second fluid on the side of the core, a partition is not required in the cover, making it possible to make the cover thinner or flatter. Furthermore, even if the flow rate of cooling water is increased, there is no need to increase the size of the cover, resulting in a compact heat exchanger, and other practical advantages.

[Brief explanation of the drawing]

Fig. 1 is a sectional view taken along line A-A in Fig. 3 showing a heat exchanger according to this invention, Fig. 2 is a sectional view taken along line B-B in Fig. 3, and Fig. 3 is a plan view. Figure 4 is a partial sectional view showing the communication passages of the core, Figure 5 is a plan view of the plate used in the heat exchanger according to this invention, Figure 6 is a side view of the plate in Figure 5, and Figure 7 is a diagram showing the plate used in the heat exchanger according to this invention. FIG. 8 is a plan view of another plate used in the heat exchanger according to the invention; FIG. 8 is a side view of the plate of FIG. 7; 10... Heat exchanger, 11... Core, 12... Housing, 15, 16... Plate, 17... One heat exchange chamber, 18... Other heat exchange chamber, 20...
...First inflow chamber, 21...First outflow chamber, 22...
...Second inflow chamber, 23...Second outflow chamber, 24...
...inflow opening, 25...outflow opening.

Claims (1)

[Scope of utility model registration request] It has a housing and an annular core housed in the housing, and the core is formed by laminating a large number of plates and is connected to at least two types of heat exchange chambers formed between each plate and to each other along the thickness direction. It has a first inflow chamber and a first outflow chamber formed in parallel, and the first inflow chamber and the first outflow chamber are in communication with each other through one heat exchange chamber, and between the core and the housing. is formed with a second inlet chamber and a second outlet chamber separated from each other, the other heat exchange chamber of the core having a radially formed inlet opening and an outlet opening; The inflow chamber and the second outflow chamber have an inflow opening;
Heat exchangers, characterized in that they are in communication with each other via the other heat exchange chamber and an outflow opening.