JPH0356769Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The invention relates to a heat exchanger, particularly a heat exchanger capable of simultaneously exchanging heat between three or more types of fluids.

BACKGROUND ART For example, as shown in FIG. 8, a multi-plate heat exchanger 10 has two pairs of openings 12, 13 and 1
A plurality of flat plates 11 with holes 4 and 15 perforated therein.
These plates 11 have rising portions 11a formed on their edges, and are stacked with the rising portions 11a interlocked with each other. A pair of thick plate-shaped spacing pieces 1 are provided between adjacent bottom surfaces of the stacked plates 11.
6 and 17 are arranged. The spacer pieces 16 and 17 have through holes 18 and 21 and notches 19 and 20, respectively.
are formed, and the through holes 18 and 21 are formed in the plate 1.
The notches 19 and 2 are located on the same center as the openings 12 and 15 bored in the bottom of the
0 is an opening 1 bored in the bottom of the plate 11
3 and 14 on the same center. Through hole 1
8 and 21 and the notches 19 and 20 are arranged diagonally on the plate 11, respectively, and the notches 1 of the spacing pieces 16 and 17 of the upper and lower adjacent plates 11
The through holes 9 and 20 and the through holes 18 and 21 are provided alternately on different diagonals. Bottom plate 11l
without forming an opening in the uppermost plate 11.
U has a flat plate shape without a rising edge portion, and its edge is fitted into the rising portion 11a of the plate 11 in the next stage.

A pair of thick plates 24, 25 are formed on the upper surface of the uppermost plate 11u, and each thick plate 24, 25 has a pair of holes 26, 27 and 28, 29, respectively.
is formed. Holes 26, 27, 28 and 29
is the through hole 1 of the adjacent lower spacer pieces 16 and 17.
8, 19, 20 and 21 respectively. The bottom surface of each plate 11 has a peak portion 30a and a valley portion 30.
A corrugated fin 30 is formed having the same shape as the upper plate 11.
The valley portion 30b contacts the bottom surface of the adjacent lower plate 11. Each contact portion and mating portion of the heat exchanger 10 is fixed with a brazing material in the shape shown in FIG.

In the heat exchanger 10 having the above configuration, of the two liquids A and B through which heat transfer is performed, liquid A is the eighth liquid.
As shown by arrow A in the figure, it flows into the corresponding plate 11 from the inlet passage formed by the opening 12 and the through hole 18 of each layer, and flows into the corresponding plate 11 through the opening 15 and the through hole 2.
1 through the outlet passage formed by 1. In the meantime, the water flows into the center of the plate 11 from the notches 19 at every other step, flows along the corrugated fins 30, and reaches the through holes 21 from the notches 20. Further, as shown by arrow B in FIG. 8, liquid B passes through the inlet passage formed by the opening 14 and through hole 23 of each layer, and flows into the center of the plate 11 from the cutout 20 of each layer. , Colgate Finn 3
0, and from every other notch 20 to 1
9, reaches the through hole 22, and is sent out from the outlet passage. In this way, liquids A and B alternately form layers between the bottom surfaces of adjacent plates 11 and flow in opposite directions, and heat transfer between the liquids occurs through the bottom surfaces of plates 11. .

Problems to be Solved by the Invention By the way, when the heat exchanger 10 is used as a water-water heat exchanger, as shown in FIG.
3 to the exhaust pipe 34 of the internal combustion engine 33.
A pipe 35 for passing cooling water is connected to the inlet 36, and an outlet 37 is connected to the internal combustion engine 33 through the water-water heat exchanger 10.
The internal combustion engine 33 is cooled by being connected to the internal combustion engine 33. The water-water heat exchanger 10 is connected to a heat storage water tank 38. When cooling the internal combustion engine 33, the exhaust gas is cooled with cooling water in the heat exchanger 31, and the cooling water is further cooled in the heat exchanger 10, so a plurality of heat exchangers are required. in this way,
Conventional heat exchangers can only exchange heat between two fluids. For example, in order to simultaneously recover the heat of exhaust gas and the heat of cooling water of an internal combustion engine, such as in a gas engine heat pump system, a gas - Two types of heat exchangers are required: a water heat exchanger and a water-water heat exchanger. However, the use of two types of heat exchangers not only complicates the piping but also increases heat loss, resulting in a significant reduction in the amount of heat recovered.

The object of this invention is to provide a heat exchanger that can simultaneously perform multiple heat transfer operations between three or more types of fluids.

Means for Solving the Problems This invention includes a plurality of plates fixed in a stacked state, a pair of spacing pieces fixed to both ends of each of the plates, and a part of the space between the plurality of plates. a pipe connected to the pair of spacer pieces, a first heat exchange chamber formed in the pipe, a first passage including the first heat exchange chamber through which a first fluid passes, and the plurality of plates. A second heat exchange chamber formed on a part of the plate and outside the pipe, and a second fluid that includes the second heat exchange chamber and exchanges heat with the first fluid pass through. a second passage, a third heat exchange chamber formed on another plate between the plurality of plates, and a third heat exchange chamber including the third heat exchange chamber and exchanging heat with the second fluid. a third passage through which a fluid passes; a first inlet and a first outlet formed parallel to the plate as part of the first passage at both ends of the plate; An arrangement is provided with a second inlet, a second outlet and a third inlet, third outlet formed at right angles to the plate.

Effect Heat transfer occurs between the first fluid passing through the first passage and the second fluid passing through the second passage, and at the same time, the heat transfer occurs between the second fluid passing through the second passage and the second fluid passing through the third passage. Heat transfer between the three fluids takes place within the same heat exchanger.

Embodiment Hereinafter, an embodiment of this invention will be described with reference to FIGS. 1 to 7.

1 is a front view of a heat exchanger 50 according to this invention, FIG. 2 is a side view, FIG. 3 is an end view of a cross section taken along line A-A in FIG. 2, and FIG. 4 is a B in FIG. 1. - It is a sectional view along the B line. 3 and 4 do not show the lower part of the plate. The plates of the heat exchanger 50 according to this invention are basically assembled in the same manner as the multi-plate heat exchanger 10 shown in FIG. The heat exchanger 50 includes a plurality of plates 54 fixed in a stacked state, a pair of spacing pieces 55a and 55b fixed to both ends of each of the plates 54, and a space between some of the plates 54a between the plurality of plates 54. A pipe 56 connected to the pair of spacing pieces 55a at
and a first heat exchange chamber 6 formed within the pipe 56.
1, a first passage 51 including a first heat exchange chamber 61 and through which the first fluid passes, a second heat exchange chamber 62 formed outside the pipe 56, and a second passage 51 including the second heat exchange chamber 62 and through which the first fluid passes; A second passage 52 through which a second fluid exchanges heat with one fluid, a third heat exchange chamber 63 formed between a plurality of plates 54, and a second A third passage 53 through which a third fluid exchanges heat with the fluid, and a plate 54.
A first inlet 71 and a first outlet 81 are formed parallel to the plate 54 as part of the first passage at both ends of the
and a second inlet 7 formed at right angles to the plate 54 as a second passage 52 and a third passage 53, respectively.
2. Second exit 82 and third inlet 73, third exit 8
3. As is clear from FIGS. 1 and 3, the heat exchanger 50 has a rectangular cross section as a whole, the first inlet 71 has a gradually expanding cross section, and the first outlet 81 has a gradually expanding cross section. It has a shrinking shape. The first heat exchange chamber 61 is formed inside the pipe 56, and the second heat exchange chamber is formed outside the pipe 56 and in a part of the plate 54a of the plate 54. Further, the third heat exchange chamber 63 includes the plate 5
4 is formed on the other plate 54b.

The heat exchanger 50 shown in FIGS. 1 to 4 is similar to the plate 11, the spacing pieces 16 and 17, the uppermost plate 11u, and the thick plates 24, 25 shown in FIG.
As schematically shown in FIG. 5, it has plates 54a and 54b fixed in layers, spacer pieces 55a and 55b, an uppermost plate 54u, and thick plates 57 and 58. However, the spacing piece 55 used in the heat exchanger 50 of this invention has one through hole 64 and a notch 6 recessed in the width direction, as shown in FIGS. 1-A and 1-B.
5 and a spacer piece 55a in which a notch 66 recessed in the thickness direction is formed, and a notch 67 recessed in the width direction and a through hole 68 as shown in FIG. 7 2-A and 2-B.
A spacer piece 55b is formed thereon.

Next, in the heat exchanger of this invention, the first fluid,
The flow of the second fluid and the third fluid will be explained with reference to FIGS. 4 and 5. In Figures 4 and 5, the layers of plates are shown as 1, 2, 3, 1, 2, 3, from the top to the bottom.
Represented by 4... As shown in Figures 4 and 5,
The first fluid flows into the heat exchanger 50 through the first inlet 71, and the second fluid and the third fluid flow into the heat exchanger 50 through the first inlets 72 and 73, respectively, in the first layer. In the second layer, the first fluid flows into the pipe 56 which is the first heat exchange chamber 61, and
The second fluid flows diagonally from the notch 65 through the second heat exchange chamber 62 from left to right to the notch 65 .
Heat exchange occurs between the first fluid and the second fluid in the second layer. In the third layer, the third fluid flows diagonally from the notch 67 through the third heat exchange chamber 63 from right to left. Heat exchange occurs between the second fluid flowing through the second layer and the third fluid flowing through the third layer. In the fourth layer, as in the second layer, the first fluid flows into the pipe 56, and the second fluid flows into the notch 6.
5 flows diagonally through the second heat exchange chamber from left to right to the notch 65. Although not shown, it can be understood that fluid flows in the layers below the fifth layer in the same way as in the first to fourth layers. Finally, the first fluid, the second fluid, and the third fluid pass through the first outlet 81, the second outlet 82, and the third outlet 83, and are delivered from the heat exchanger 50 to other devices.

As mentioned above, the first heat exchange chamber 6 of the first passage 51
1 and the second fluid passing through the second heat exchange chamber 62 of the second passage 52 . Heat transfer occurs between the second fluid passing through and the third fluid passing through the third heat exchange chamber 63 of the third passage 53. In the above embodiment, for example, the specific heat of the second fluid has a value greater than or equal to the specific heat of the first fluid and the specific heat of the third fluid. However, the amount of heat transferred within a heat exchanger varies depending on factors such as the flow rate, flow rate, or heat transfer area of each fluid, so the relationship between the specific heats described above is not particularly important.In other words, the specific heat of each fluid can adopt inversely related values or various values. For example, the first fluid, the second fluid, and the third fluid are exhaust gas of the internal combustion engine, cooling water of the internal combustion engine, and water, respectively, or engine oil, water, and torque converter oil, respectively.

The embodiments of this invention are subject to modification. For example, the first heat exchange chamber 61, second heat exchange chamber 62, and third heat exchange chamber 63 shown in FIG. 4 can be formed in any laminated state not shown. Further, in the above embodiment, a structure is shown in which heat is exchanged between the first fluid and the second fluid and between the second fluid and the third fluid. The ability to perform heat exchange or obtain a single heat exchange between a second fluid and a third fluid or a fourth fluid is
It will be obvious to those skilled in the art. Furthermore, it is clear from the above embodiments that heat transfer is performed between five or more fluids.

Effects of the invention As mentioned above, in the heat exchanger of this invention, heat can be transferred simultaneously between the first fluid and the second fluid and between the second fluid and the third fluid in one heat exchanger. Therefore, it is possible to downsize the heat exchanger. Therefore, compared to the conventional case where a plurality of heat exchangers are used, heat transfer efficiency can be improved and heat loss can be reduced. Furthermore, since the length of piping required for heat exchange is short, fluid leakage can be prevented and leaks can be easily discovered. In particular, in the heat exchanger of this invention, since the first passage is formed in a straight line, the pressure loss in the flow passage is small, and the heat exchanger is optimal when the first passage is used as an exhaust gas passage of an internal combustion engine.

[Brief explanation of the drawing]

Fig. 1 is a front view of the heat exchanger according to this invention, Fig. 2 is a side view, Fig. 3 is an end view of a cross section taken along line A-A in Fig. 2, and Fig. 4 is a B--B in Fig. 1. 5 is a schematic exploded perspective view of a number of plates fixed in layers; FIG. 6 is a perspective view showing the second layer including the second heat exchange chamber; FIG. 7 is a sectional view taken along line B; A and 2-A
1-B and 2-B are cross-sectional views of FIGS. 7 1-A and 2-A, respectively. 8
9 is an exploded perspective view of a conventional multi-plate heat exchanger, FIG. 9 is a front view of the conventional multi-plate heat exchanger, and FIG. 10 is a block diagram showing an example of the use of the conventional heat exchanger. 50... Heat exchanger, 51... First passage, 52...
...Second passage, 53...Third passage, 54, 54a,
54b... plate, 55, 55a, 55b...
Spacing piece, 56...Pipe, 61...First heat exchange chamber, 62...Second heat exchange chamber, 63...Third heat exchange chamber, 71...First inlet, 72...Second inlet, 73
...Third entrance, 81...First exit, 82...Second exit, 83...Third exit.

Claims (1)

[Claims for Utility Model Registration] (1) A plurality of plates fixed in a stacked state, a pair of spacing pieces fixed to both ends of each of the plates, and a part of the plates between the plurality of plates. a pipe connected to the pair of spacing pieces, a first heat exchange chamber formed in the pipe, a first passage including the first heat exchange chamber through which a first fluid passes, and a plurality of plates. a second heat exchange chamber formed on some of the plates and outside the pipe; and a second heat exchange chamber that includes the second heat exchange chamber and through which a second fluid that exchanges heat with the first fluid passes. two passages, a third heat exchange chamber formed on another plate between the plurality of plates, and a third fluid that includes the third heat exchange chamber and exchanges heat with the second fluid. a third passage through which
a first inlet and a first outlet formed parallel to the plate as part of the first passageway at both ends of the plate; and a second outlet formed at right angles to the plate as the second passageway and third passageway, respectively. A heat exchanger comprising an inlet, a second outlet, a third inlet, and a third outlet. (2) The heat exchanger according to claim 1, wherein the first fluid, second fluid, and third fluid are exhaust gas, water, and cooling water of an internal combustion engine, respectively. (3) The above-mentioned first fluid, second fluid, and third fluid are engine oil, water, and torque converter oil, respectively.
Heat exchanger as described in Section. (4) A portion of the spacing piece is formed with at least one through hole, a notch recessed in the width direction, and a notch recessed in the thickness direction, and the notch recessed in the thickness direction is provided with the pipe. The heat exchanger according to any one of claims (1) to (3) of the utility model registration claim, in which: is fixed.