JPH0645164Y2 - Heat exchanger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field The present invention relates to a heat exchanger, and more particularly to a housing type heat exchanger arranged adjacent to an oil filter and having high heat exchange efficiency.

(Prior Art) For example, Japanese Examined Patent Publication (Kokoku) No. Sho 55-48238 has a heat exchanger and an oil filter attached to a single connector pipe, which can continuously cool and filter oil in a small space. A switch is disclosed.

The conventional heat exchanger has a housing type structure in which a large number of plates are provided in a housing and oil chambers and water chambers are alternately formed between the plates. In this housing type structure, a water supply part and a drain part for supplying and discharging water can be provided on the side part of the housing, so that good heat exchange efficiency can be obtained. In the heat exchanger, the oil pipe is attached to the connector pipe after being attached to the engine bracket by the connector pipe. In this case, in order to prevent oil leakage, the oil filter is screwed into the connector pipe in advance so that the oil filter is in close contact with the heat exchanger. Therefore, the heat exchanger needs a compressive strength in the height direction. Become. In this respect, the housing-type structure provides greater buckling strength to the annularly formed housing.

(Problems to be solved by the invention) By the way, the housing heat exchanger has a drawback that the manufacturing cost is high because the structure is complicated and the number of processing steps in the manufacturing process is large. Further, since the plate is bent outward in the thickness direction and the radial direction to form the core, there is a drawback that the core becomes large in the thickness direction or the radial direction outside.

Therefore, it is conceivable to use a housingless heat exchanger that does not use a housing. The housingless type heat exchanger is disclosed, for example, in Japanese Utility Model Application No. 59-
It is publicly known as shown in Japanese Patent No. 134755. However, as a filter body type heat exchanger to be attached to one connector pipe together with an oil filter, a practical housingless type heat exchanger has not been proposed. The reason is that the housingless heat exchanger manufactured by laminating and brazing a large number of plates cannot supply a sufficient amount of cooling water to the heat exchange chamber formed between the plates, and therefore, it is expensive. This is because the heat exchange efficiency part cannot be obtained.

Further, in the conventional housingless heat exchanger, a pipe for distributing cooling water has to be connected to the cover, which is a layout limitation. Further, when the flow rate of the cooling water is increased, the diameter of the pipe is increased and the cover is increased in size, and as a result, the heat exchanger cannot be downsized.

Therefore, an object of the present invention is to solve the above-mentioned drawbacks and to provide a heat exchanger that is small in size, can be easily manufactured, and has high heat exchange efficiency.

(Means for Solving Problems) A heat exchanger according to the present invention has a housing and an annular core housed in the housing, and the core is formed by stacking a large number of plates and between the plates. It has at least two kinds of heat exchange chambers formed and a first inflow chamber and a first outflow chamber formed in parallel to each other along the thickness direction, and the first inflow chamber and the first outflow chamber are An inflow outer chamber and an outflow outer chamber, which are connected to each other through one heat exchange chamber and are separated from each other, are formed between the core and the housing, and the inflow outer chamber and the outflow outer chamber are the first inflow chamber and the outflow chamber. Is connected to a second inflow chamber and a second outflow chamber which are provided in the core in parallel with the chamber and communicate with each other via the other heat exchange chamber, and between the core and the upper wall in the housing. A reinforcing member is provided and a communication passage is formed between the first outflow chamber and the reinforcing member. The reinforcing member forming the upper wall of the communication passage has a curved surface that is convex upward.

(Operation) The first fluid flows into the core from the first inflow chamber, passes through the one heat exchange chamber and the first outflow chamber, and flows out from the core. Further, the second fluid flows from the inflow outside chamber through the second inflow chamber into the core, and then flows into the other heat exchange chamber. In the other heat exchange chamber, the second fluid exchanges heat with the first fluid flowing into the one heat exchange chamber. The second fluid then exits the core from the other heat exchange chamber through the second outflow chamber and the outflow outer chamber.

A second fluid flows into the core from the inflow outer chamber provided on the side of the core through the second inflow chamber, and flows out from the second outflow chamber to the outside of the core through the outflow outer chamber. Is small. That is, the second inflow chamber and the second outflow chamber allow an increased amount of second fluid flow and reduce flow resistance,
It has the effect of improving the heat exchange efficiency. The flow resistance of the oil flowing out of the first outflow chamber is also reduced.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS.

As shown in FIGS. 1 to 3, the heat exchanger 10 of the present invention is used.
Has a ring-shaped core 11 formed by stacking and brazing a large number of plates, a housing 12 that accommodates the core 11, and a cover 13 fixed to the lower portion of the core 11. An oil filter (not shown) connected to a connector pipe 14 for mounting the heat exchanger 10 is fixed to the upper portion of the core 11.

The core 11 is formed by stacking a large number of plates 15 (FIG. 7) and is formed parallel to at least two kinds of heat exchange chambers 17 and 18 formed between the plates 15 in the thickness direction. It has a first inflow chamber 20 and a first outflow chamber 21. The first inflow chamber 20 and the first outflow chamber 21 are connected to each other via the 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. The inflow outer chamber 22 and the outflow outer chamber 23 have end chambers 22a and 23a formed at the ends of the core 11, respectively. Inflow outer chamber 22
And the outflow outer chamber 23 are provided in the core 11 in parallel with the first inflow chamber 20 and the first outflow chamber 21, and are connected to the second inflow chamber 24 and the second inflow chamber 24 which are connected to each other via the other heat exchange chamber 18. It is connected to the second outflow chamber 25. The inflow outer chamber 22 and the outflow outer chamber 23 are connected to each other via the second inflow chamber 24, the other heat exchange chamber 18 and the second outflow chamber 25.

FIG. 7 is a plan view showing an example of the plate 15 constituting the core 11, and FIGS. 8, 9 and 10 are sectional views taken along the line D-D in FIG. 7 and line E-E, respectively. Sectional view and F-
It is sectional drawing which follows the F line. As shown in FIG. 2, the core 11
A supply passage 30 for supplying oil as the first fluid from the cover 13 to the oil filter is provided in the. The supply passage 30 is an annular projection 15h provided in the item 15b of the plate 15.
Is provided. A substantially bowl-shaped reinforcing member 31 is fixed between the core 11 and the upper wall of the housing 12 to resist a buckling load when the connector pipe 14 is tightened.

As shown in FIGS. 11 to 13, the reinforcing member 31 is provided with partition walls 41 and 42 inside a substantially rectangular outer peripheral wall 43, and has a central opening 40 in the central portion. The outer peripheral edges of the partition walls 41 and 42 are outer peripheral walls.
It is connected to the inner wall of 43. The partition 42 is located below the partition 41. An opening is formed between the edge of the partition wall 42 and the outer peripheral edge 43.
44 is formed. The interval between the outer peripheral walls 43, 43 in the GG section is wider in the upper part than the interval between the outer peripheral walls 43, 43 in the HH section.

As shown in FIG. 13, the intervals between the outer peripheral walls 43 located on both sides of the partition wall 42 are widened in the upper part with the partition wall 42 as a boundary.
The lower surface of the partition wall 41 forms a curved surface that is convex upward. plate
A central hole 15a through which the connector pipe 14 is inserted, a hole 15b forming four supply passages 30, holes 15c and 15d forming a first inflow chamber 20 and a first outflow chamber 21, respectively, and a second hole 15a. Holes 15e, 1 which respectively form the inflow chamber 24 and the second outflow chamber 25 of
With 5f.

As described above, the annular bent portion 15g is provided around the center hole 15a, and the annular protrusion 15h is provided around the hole 15b. Bent portions 15i and 15j are provided in the holes 15c and 15d. Hole 15
Circular protrusions 15k and 15l are provided around e and 15f. Further, each plate 15 is provided with a large number of embossments 15m for automatically stirring the first fluid or the second fluid.

When forming the core 11, vertically adjacent plates 15
Are brazed by rotating them by 90 degrees.

Inflow outer chamber 22 formed between the core 11 and the housing 12
An inlet pipe 26 and an outlet pipe 27 are connected to the outflow outer chamber 23, respectively. In addition, the inflow outer chamber 22 and the outflow outer chamber 23 are in contact with the outer periphery of the core 11 of the housing 12 so that the upper plate 32
Are separated from each other by a pair of projecting portions 33 and 34 formed by projecting.

In the above structure, the oil supplied from the outside by the oil pump is sent from the oil inflow hole 13a of the cover 13 through the supply passage 30 (FIG. 2) to the oil filter from the core 11. The oil which is purified from the oil filter and returns is the closing member 14d of the connector pipe 14 as shown in FIG.
It flows from the upper central hole 14a through the lateral hole 14b into the communication passage 31a formed by the reinforcing member 31. In addition, the oil is the communication passage 3
It flows into the first inflow chamber 20 from 1a and then flows into the one heat exchange chamber 17 from there. In the one heat exchange chamber 17 of the core 11, the oil flows by rotating around the connector pipe 14 in either the clockwise direction or the counterclockwise direction, and then the oil flows from the one heat exchange chamber 17 into the first heat exchange chamber 17. Through the outflow chamber 21, the communication passage 31b formed by the reinforcing member 31, and the lateral hole 14c of the connector pipe 14 to flow out from the center hole 14a to the main gallery (not shown) of the engine block. The center hole 14 of the connector pipe 14
A closing member 14d is fixed to a.

On the other hand, the cooling water as the second fluid flows from the inlet pipe 26 through the inflow outer chamber 22, the end chamber 22a and the second inflow chamber 24 into the other heat exchange chamber 18. Here, the cooling water is supplied to one heat exchange chamber 17
The hot oil inside is cooled and heat exchange is performed. The heated cooling water passes from the other heat exchange chamber 18 through the end chamber 23a and the second outflow chamber 25 and is discharged from the outflow outer chamber 23 to the outlet pipe 27.

As described above, the oil as the first fluid 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 as the second fluid flows into the core 11 from the inflow outer chamber 22 and then flows through the second inflow chamber 24 to the other heat exchange chamber 18.
In the other heat exchange chamber 18, the cooling water exchanges heat with the 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.

In the present embodiment, the second fluid flows from the inflow outer chamber 22 provided on the side portion of the core 11 through the second inflow chamber 24 into the core 11 and the second outflow chamber 25. Through the outflow outer chamber 23
Since it flows out of the core 11 from the outside, the flow resistance is small. That is, the second inflow chamber 24 and the second outflow chamber 25 have a function of reducing the flow resistance of the second fluid and improving the heat exchange efficiency. Further, the first fluid passes through the outflow chamber 21 and enters the communication passage 31b,
Next, when flowing out from the core 11, since the lower surface of the partition wall 41 of the reinforcing member 31, which is the upper wall of the communication passage 31b, forms the curved surface 45, the first fluid flows smoothly, and the flow resistance similarly decreases. Let

Therefore, in this invention, it is possible to manufacture by stacking a plurality of plates 15 alternately, and it is possible to secure a large flow rate of the cooling water as the second fluid,
It will be further appreciated that it facilitates the flow of oil as the primary fluid.

In the present embodiment, since a large number of plates having tapered outer peripheral portions are laminated and formed, the plates do not become large in the thickness direction or the radial outside, and as a result, the core can be manufactured in a small size. it can. Further, the plate itself can be easily formed. Further, 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 as compared with the conventional case.

In any case, the core 11 used in the heat exchanger of the present invention has a great practicality in that it can be used as it is without changing the shape or structure of the core used in the conventional housingless heat exchanger. worth it.

(Effect of the Invention) The heat exchanger of the present invention uses the conventionally used core as it is, reduces the flow resistance of the first fluid, increases the flow rate of the second fluid, and improves the heat exchange efficiency. can do.

At the time of manufacturing the heat exchanger, it can be easily manufactured by stacking the conventional plates, and since the pipe for distributing the cooling water can be connected to any position of the housing, there are restrictions on the layout of the pipe. Will be resolved. Furthermore,
By forming a second fluid flow path on the side of the core,
Since the partition wall of the cover is not required, it is possible to make the cover thin or flat. Further, even if the flow rate of the cooling water is increased, it is not necessary to upsize the cover, and as a result, a small heat exchanger can be obtained, which has various practical advantages.

[Brief description of drawings]

FIG. 1 shows a heat exchanger according to the present invention, which is taken along the line AA in FIG.
2 is a sectional view taken along line BB in FIG. 4, FIG. 3 is another sectional view, FIG. 4 is a plan view, FIG. 5 is a side view, and FIG. 6 is an upper part. FIG. 7 is a plan view showing a state in which the heat is removed, FIG. 7 is a plan view of a plate used in the heat exchanger according to the present invention, FIG. 8 is a sectional view taken along the line D-D of FIG. 7, and FIG. FIG. 10 is a sectional view taken along line EE of FIG. 10 and is a sectional view taken along line FF of FIG. 7. 11 is a plan view of the reinforcing member, FIG. 12 is a sectional view taken along the line I--I of FIG. 11, and FIG. 13 is a sectional view taken along the line G--G of FIG. 10 …… Heat exchanger, 11 …… Core 12 …… Housing, 15 …… Plate 17 …… One heat exchange chamber 18 …… The other heat exchange chamber 20 …… First inflow chamber, 21 …… First Outflow chamber 22 …… Inflow outer chamber, 23 …… Outflow outer chamber 24 …… Second inflow chamber, 25 …… Second outflow chamber

Claims (1)

[Scope of utility model registration request] 1. A heat exchange chamber having a housing and an annular core housed in the housing, wherein the core is formed by stacking a large number of plates, and at least two kinds of heat exchange chambers formed between the plates and a thickness. A first inflow chamber and a first outflow chamber that are formed parallel to each other along the direction, and the first inflow chamber and the first outflow chamber are connected to each other via one heat exchange chamber,
An inflow outside chamber and an outflow outside chamber are formed between the core and the housing, and the inflow outside chamber and the outflow outside chamber are provided in the core in parallel with the first inflow chamber and the first outflow chamber. And is connected to a second inflow chamber and a second outflow chamber that are in communication with each other via the other heat exchange chamber, a reinforcing member is provided between the core and the upper wall in the housing, A heat exchanger characterized in that a communication passage is formed between the outflow chamber and the reinforcing member, and a portion of the reinforcing member forming the upper wall of the communication passage has a curved surface that is convex upward.