JP2000227291A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchanger capable of simplifying with more excellent heat exchanging efficiency than that of a prior art. SOLUTION: The heat exchanger comprises a body 11 obtained by laminating in a laminar state fluid passages 21, 22 by laminating partitions 10. The body 11 has a first inlet 31, a first outlet 41, a second inlet 32 and a second outlet 42. A plurality of fluid passages have a first fluid passage 21 for passing a first fluid 81 and a second fluid passage 22 for passing a second fluid 82. The passage 21 is formed in a serial passage by connecting in series coupling means 511 to 513. The passage 22 is formed in a serial passage by connecting in series coupling means 521 to 523.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a compact heat exchanger having excellent heat exchange efficiency.

[0002]

2. Description of the Related Art As a conventional heat exchanger, for example, as disclosed in JP-A-63-25494 and JP-A-7-190650, a plurality of plates (partitions) are laminated and interposed between the plates. A plate-type heat exchanger having a plurality of fluid passages is known.

[0003] As shown in Figs. 8 and 9, the conventional heat exchanger 9 has a plurality of plates 90 having through holes 910 at four locations, thereby stacking a first fluid 81 through which a first fluid 81 passes.
A fluid passage 91 and a second fluid passage 92 for passing the second fluid 82
Are formed alternately. Further, by arranging the through holes 910 on the same axis, the forward path 941 of the first fluid 81, the return path 942 of the first fluid 81, and the second fluid 82 are respectively provided.
Outgoing path 951 and the outgoing path 952 of the second fluid 82 are formed.
Further, the outward path 941 and the return path 942 of the first fluid 81 are opened only in the first fluid passage 91, while the outward path 951 and the return path 952 of the second fluid passage 82 are opened only in the second fluid passage 92. It is.

[0004] As shown in FIGS. 8 and 9, in the heat exchanger 9, the first fluid 81 introduced into the outward passage 941 of the first fluid 81 passes through a plurality of first fluid passages 91 in parallel. Pass and enter the return route 942,
It is discharged without flowing into another first fluid passage 91.
Similarly, the second fluid 82 introduced into the outward passage 951 of the second fluid 82 passes through the plurality of second fluid passages 92 in parallel, flows into the return passage 952, and thereafter, passes through the other second fluid passages. It is discharged without flowing into 92.

[0005]

However, the conventional heat exchanger 9 has a low heat exchange efficiency, and therefore has to be increased in size. The reason for this is that each of the above fluids 81,
It is considered that sufficient heat exchange cannot be carried out because 82 passes through the first fluid passage 91 or the second fluid passage 92 in a parallel state and passes through only one fluid passage.

The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a heat exchanger which is more excellent in heat exchange efficiency and can be made more compact than before.

[0007]

According to a first aspect of the present invention, a plurality of partitions are laminated to provide a fluid passage between the partitions and a body formed by laminating the fluid passages in layers. Comprises a first inlet for introducing a first fluid, a first outlet for discharging the first fluid, a second inlet for introducing a second fluid, and a second outlet for discharging the second fluid. The plurality of fluid passages are constituted by a plurality of first fluid passages through which the first fluid passes and a plurality of second fluid passages through which the second fluid passes. Are connected in series by a plurality of connecting means to form a serial path, one end of which is connected to the first inlet and the other end of which is connected to the first outlet, respectively. The passages are connected in series by a plurality of connecting means Together form a file path, the one end of the second inlet and the other end is connected to the second outlet, the introduced from the first inlet first
Fluid flows in series through all of the first fluid passages and is discharged from the first outlet, and the second fluid introduced through the second inlet flows through all of the second fluid passages in series. Wherein the heat exchanger is configured to be discharged from the second outlet.

It is most remarkable in the present invention that the plurality of first fluid passages are connected in series and the plurality of second fluid passages are also connected in series, and the first fluid and the second fluid passage are connected in series. The fluid is configured to be discharged after passing through all of the plurality of first fluid passages and the plurality of second fluid passages.

[0009] The first fluid passage and the second fluid passage are arranged so as to be adjacent to each other on at least one surface. Accordingly, heat exchange between the first fluid passing through the first fluid passage and the second fluid passing through the second fluid passage can be performed via the partition. The first fluid and the second fluid
The fluid is a fluid as a heat medium, and various fluids such as water and exhaust gas of an internal combustion engine can be applied.

Further, the first fluid passages are connected to each other and the second fluid passages are connected to each other.
The connection between the fluid passages is performed by the above-described connecting means. As this connecting means, a separate member in the form of a pipe may be used, or it may be provided by joining partitions as in a conventional plate heat exchanger.

Next, the operation of the present invention will be described. In the heat exchanger of the present invention, as described above, the first fluid passage and the second fluid passage are each connected in series to form a series passage. Therefore, the heat exchanger of the present invention can greatly improve the heat exchange efficiency as compared with the conventional plate heat exchanger.

That is, with the above configuration, the first fluid introduced from the first inlet flows through all of the first fluid passages in series and is discharged from the first outlet. Similarly, the second fluid introduced from the second inlet flows through all of the second fluid passages in series, and is discharged from the second outlet. The first fluid and the second fluid are in contact with each other via the partition while passing through the first fluid passage and the second fluid passage, and exchange heat with each other.

[0013] Therefore, the heat exchanger of the present invention is different from the conventional case in which a plurality of fluid passages are connected in parallel.
The ratio of the area in which each fluid can exchange heat before flowing into the heat exchanger and exhausting it is greatly increased. Therefore, the heat exchange efficiency is greatly improved as compared with the conventional case. Further, by improving the heat exchange efficiency, the entire apparatus can be made more compact than before.

Next, as in the second aspect of the present invention, the first
It is preferable that the fluid passages and the second fluid passages are alternately stacked. In this case, since the different fluid passages are arranged so as to sandwich each other, the adjacent area where heat can be exchanged can be further increased, and the heat exchange efficiency can be further improved.

According to a third aspect of the present invention, the openings of the two connecting means opened to each of the fluid passages are provided at positions shifted from each other by substantially 180 ° when viewed from a substantially central portion of the fluid passage. Is preferred. In this case, the fluid flowing into each fluid passage is more uniformly spread and circulated in the fluid passage, so that the contact state between the first and second fluids is good, and the heat exchange efficiency can be further improved. it can.

Also, as in the invention of claim 4, the main body is provided with a main pipe penetrating from the first inlet to a first fluid passage farthest from the first inlet.
Fluid flows from the first inlet through the main pipe into the first fluid passage connected to the main pipe, and then sequentially passes through the other first fluid passages in series through the connection means. , Is preferably configured to be discharged from the first outlet.

In this case, by providing the main pipe, the flow order of the first fluid can be simplified so that the flow order is from one end. Therefore, it is also possible to relatively easily design an alternate layered structure with the second fluid passage. In addition, due to the presence of the main pipe, each partition can be firmly fixed, and the strength of the entire heat exchanger can be improved.

Further, the main pipe is provided so as to penetrate the main body. Therefore, each fluid passage is a donut-shaped passage surrounding the outer wall of the main pipe except for the first fluid passage connected to the main pipe. Therefore, in each fluid passage, the fluid is rectified around the main pipe and the fluid can flow smoothly. In particular, it is preferable that the main pipe is located at the center of the fluid passage, and the connecting means is arranged so as to surround the main pipe. In this case, the flow state of the fluid can be further smoothed.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment A heat exchanger according to an embodiment of the present invention will be described with reference to FIGS. The heat exchanger 1 of this example is shown in FIGS.
As shown in FIG. 1, a heat exchanger for a GHP (gas heat pump), comprising a first fluid 81 made of exhaust gas of an internal combustion engine.
And a heat exchanger of a type that exchanges heat with the second fluid 82 made of cooling water. Here, FIG. 1 is a diagram for explaining the internal structure of the heat exchanger 1, and for convenience of explanation,
The arrangement of each part is slightly changed (see FIGS. 3 and 4).

As shown in FIG. 1, the heat exchanger 1 has a plurality of partitions 10 laminated to provide a fluid passage between the partitions 10 and a fluid passage 2 between the partitions.
It has a main body 11 formed by laminating layers 1 and 22 in layers. A first inlet 3 for introducing a first fluid 81 is provided on the upper surface of the main body 11.
1, a first outlet 41 for discharging the first fluid 81, a second inlet 32 for introducing a second fluid 82, and a second fluid 8
And a second outlet 42 for discharging the second. The plurality of fluid passages 21 and 22 include a plurality of first fluid passages 21 through which the first fluid 81 passes and a plurality of second fluid passages 22 through which the second fluid 82 passes.

As shown in FIG. 1, the plurality of first fluid passages 21 are connected in series by a plurality of connecting means 511 to 513 to form a series path, and one end of the series path is connected to the first path. The other end is connected to the inlet 31 and the other end is connected to the first outlet 41. The plurality of second fluid passages 22 are connected in series by a plurality of connecting means 521 to 523 to form a serial path, and one end of the serial path is connected to the second inlet 32 and the other end is connected to the second inlet 32. Each is connected to the second outlet 42.

Then, the first fluid 81 introduced from the first inlet 31 flows through all the first fluid passages 21 in series and is discharged from the first outlet 41, and the second fluid 32 The second fluid 82 introduced through the second fluid passage 22 flows through the second fluid passage 22 in series and is discharged from the second outlet 42.

The connecting means 511 to 513 and 521 to 5
As shown in FIG. 1, a pipe 23 was used as 23 and joined to the partitions 21 and 22 described above. The first fluid passages 21 and the second fluid passages 22 are alternately stacked. That is, except for the lowermost stage and the uppermost stage, each first fluid passage 21 is sandwiched by the second fluid passage 22 and
The fluid passage 22 was configured to be sandwiched by the first fluid passage 21.

In this embodiment, as shown in FIGS. 1 and 2, the first fluid passage 21 which is one of the plurality of first fluid passages is provided.
(A) is arranged at the lowermost part of the main body 11 (the position farthest from the first entrance). Further, a main pipe 6 penetrating from the upper surface of the main body 11 to the lowermost first fluid passage 21 (a) is provided. The first inlet 31 is provided at the upper end of the main pipe 6.

Then, as shown in FIG. 1, the first fluid 81 flows from the first inlet 31 through the main pipe 6 into the first fluid passage 21 (a) at the lowermost portion, and then flows upward. The other first fluid passages 21 (b) and (c) arranged at the (third and fifth stages from the bottom) are
It is configured to sequentially pass in series via 11 to 513, flow upward, and be discharged from the first outlet 41.

On the other hand, as shown in the drawing, the second fluid 82 is supplied from the second inlet 32 to the uppermost second fluid passage 22.
(A), and then into the second fluid passage 22 (b) of the second stage from the bottom through the connecting means 521,
The second fluid passage 2 in the fourth stage from the bottom through the connecting means 522
After flowing into 2 (c), it is configured to be discharged from the second outlet 42 via the connecting means 523.

Also, as shown in FIGS.
Of the fluid passages 21 and 22 was a donut shape centered on the main pipe 6. Further, the openings of the two connecting means opened to the respective fluid passages 21 and 22 are viewed from substantially the center of the fluid passage.
It was provided at a position shifted from each other by approximately 180 ° as much as possible.

For example, as shown in FIG. 3, the first fluid passage 21 (b) at the third stage from the bottom has a donut-shaped space centered on the main pipe 6 as shown in FIG. , On its upper surface, a connecting means 5 connected thereto.
12 and a connecting means 5 connected to the lower surface thereof.
Eleven openings are provided. And these 2
The two openings are arranged at positions shifted by 180 ° about the main pipe 6. The first fluid passage 21
In (b), connecting means 521 and 522 for the second fluid are arranged to penetrate.

FIG. 4 is a plan view showing the arrangement of all the connecting means 511 to 513 and 521 to 523.
Shown in As shown in FIG.
3, 521 to 523 are arranged so that the openings in the same fluid passage are shifted from each other by 180 ° as much as possible and surround the main pipe 6 around the main pipe 6.

Next, the operation of this embodiment will be described. In the heat exchanger 1 of the present embodiment, both the first fluid passage 21 and the second fluid passage 22 are connected in series to form a series passage. Therefore, the first fluid 81 introduced from the first inlet 31 flows through all the first fluid passages 21 (a) to 21 (c) in series and is discharged from the first outlet 41. Similarly, the second fluid 82 introduced from the second inlet 32 is
All of the fluid passages 22 (a) to (c) flow in series and are discharged from the second outlet 42.

Therefore, the first fluid 81 and the second fluid 82 can perform heat exchange not only in one fluid passage but also in the plurality of first fluid passages 21 and the second fluid passages 22 a plurality of times. . Therefore, in the heat exchanger 1 of the present embodiment, each fluid can exchange heat before flowing into and out of the heat exchanger as compared with the conventional case in which a plurality of fluid passages are connected in parallel. The ratio of the large area is greatly increased. Therefore,
In the heat exchanger 1 of the present embodiment, the heat exchange efficiency is greatly increased as compared with the conventional case, and the entire apparatus can be made more compact than before.

Further, in the present embodiment, the first fluid passages 21 and the second fluid passages 22 are alternately stacked. Also,
By arranging the arrangement of the opening of the connecting means in each of the fluid passages 21 and 22 and the arrangement of the main pipe 6, each fluid 81, 82
Circulates smoothly, and partial stagnation is unlikely to occur. With these, the heat exchange efficiency can be further improved.

In this embodiment, the provision of the main pipe 6 makes it relatively easy to design the arrangement order of the fluid passages 21 and 22 and the arrangement order of the connecting means 511 to 513 and 521 to 523. Can be. In addition, due to the presence of the main pipe 6, the fixing of each partition 10 can be strengthened, and the strength of the entire heat exchanger 1 can be improved.

Second Embodiment As shown in FIG. 5, this embodiment is an example in which the main pipe 6 in the first embodiment is deleted and the number of fluid passages 21 and 22 is changed to eight. FIG. 5 is a view for explaining the internal structure of the heat exchanger, similarly to FIG. 1, and the arrangement of each part is slightly changed for convenience of explanation.

As shown in the figure, the first fluid 81 is the first fluid 81.
From the inlet 31, the fluid first flows into the first fluid passage 21 (a) at the fifth stage from below via the connecting means 511, and then flows into the first fluid passage 21 (b) at the lowest stage via the connecting means 512. Then, it flows into the first fluid passage 21 (c) at the third stage from the bottom through the connecting means 513, and then the connecting means 51
4, flows into the first fluid passage 21 (d) at the seventh stage from the bottom, and then is discharged through the connecting means 515 and the first outlet 41.

The second fluid 82 flows from the second inlet 32 through the connecting means 521 to the second fluid passage 2 in the sixth stage from the bottom.
2 (a), and then into the second fluid passage 22 (b) from the bottom through the connecting means 522, and then through the connecting means 523 to the fourth fluid passage 22 (b) from the bottom. The fluid flows into the two-fluid passage 22 (c), and then through the connecting means 524, the eighth (uppermost) second fluid passage 22 (d) from below.
, And then discharged through the second outlet 42.

The other points are the same as in the first embodiment. In the case of the present embodiment, the number of layers of the fluid passages 21 and 22 is increased compared to the first embodiment, so that the heat exchange efficiency can be further improved. Otherwise, the same operation and effect as in the first embodiment can be obtained except for the operation and effect by providing the main pipe.

Third Embodiment As shown in FIG. 6, this embodiment is an example in which the shape of the main body 11 in the first embodiment is changed to a hexagonal prism. Also in the case of this example, the same operation and effect as in the first embodiment can be obtained. It is also possible to form another polygonal column instead of the hexagonal column.

Fourth Embodiment As shown in FIG. 7, this embodiment is an example in which the shape of the main body 11 in the first embodiment is changed to a column having an elliptical cross section.
Also in the case of this example, the same operation and effect as in the first embodiment can be obtained. Of course, the above-mentioned elliptical cross section can be replaced with an oval or other shapes.

In each of the above embodiments, for convenience of explanation,
The vertical positional relationship is clearly shown. However, the present invention is not limited to this direction, and it goes without saying that the same operation and effect can be obtained even if the vertical direction is reversed or if the vertical direction is changed to the horizontal direction.

[0041]

As described above, according to the present invention, it is possible to provide a heat exchanger which is more excellent in heat exchange efficiency than the conventional one and which can be made compact.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram illustrating an internal structure of a heat exchanger according to a first embodiment.

FIG. 2 is a perspective view of a heat exchanger according to the first embodiment.

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4 is an explanatory diagram showing an arrangement of connecting means in the first embodiment.

FIG. 5 is an explanatory diagram showing an internal structure of a heat exchanger in a second embodiment.

FIG. 6 is a perspective view of a heat exchanger according to a third embodiment.

FIG. 7 is a perspective view of a heat exchanger according to a fourth embodiment.

FIG. 8 is a development explanatory view showing an internal structure of a heat exchanger in a conventional example.

FIG. 9 is an explanatory diagram showing a fluid path of a heat exchanger in a conventional example.

[Explanation of symbols]

 1. . . Heat exchanger, 10. . . 10. Partition, . . Main body, 21. . . First fluid passage, 22. . . Second fluid passage, 31. . . First entrance, 32. . . Second entrance, 41. . . First exit, 42. . . Second exit, 511-515, 521-524. . . 5. connecting means; . . Main pipe, 81. . . First fluid, 82. . . The second fluid,

Claims (4)

[Claims] 1. A body having a plurality of partitions laminated to provide a fluid passage between the partitions and laminating the fluid passages in layers.
A first inlet for introducing a first fluid, a first outlet for discharging the first fluid, a second inlet for introducing a second fluid, and a second outlet for discharging the second fluid; The plurality of fluid passages are constituted by a plurality of first fluid passages through which the first fluid passes and a plurality of second fluid passages through which the second fluid passes. A plurality of connecting means are connected in series to form a serial path, one end of which is connected to the first inlet and the other end of which is connected to the first outlet, respectively. Are connected in series by a plurality of connecting means to form a serial path, one end of which is connected to the second inlet and the other end of which is connected to the second outlet, respectively.
The first fluid introduced from the inlet flows through all of the first fluid passages in series, and is discharged from the first outlet. The second fluid introduced from the second inlet is the second fluid. A heat exchanger, wherein the heat exchanger is configured to flow in series in all of the passages and to be discharged from the second outlet. 2. The heat exchanger according to claim 1, wherein the first fluid passages and the second fluid passages are alternately stacked. 3. An apparatus according to claim 1, wherein the openings of the two connecting means opened to the respective fluid passages are provided at positions shifted from each other by substantially 180 ° when viewed from a substantially central portion of the fluid passage. A heat exchanger. 4. The method according to claim 1, wherein:
The main body is provided with a main pipe penetrating from the first inlet to a first fluid passage farthest from the first inlet.
The first fluid flows from the first inlet through the main pipe into the first fluid passage connected to the main pipe, and then sequentially connects other first fluid passages in series via the connection means. A heat exchanger, wherein the heat exchanger is configured to pass through and be discharged from the first outlet.