JP6093240B2 - Heat exchanger - Google Patents

Description

  The present invention relates to a heat exchange device for exchanging heat between a high-temperature fluid and a low-temperature fluid circulated inside a casing via a heat transfer plate.

  Conventionally, for example, a plate heat exchanger disclosed in Patent Document 1 is formed by bending a rectangular parallelepiped metal casing and a single strip-shaped metal plate into a pleated shape, and the inside of the casing is a first distribution space. And a heat transfer plate that partitions into the second distribution space. A high temperature fluid inlet that allows a high temperature fluid to flow into the first circulation space, a high temperature fluid outlet that causes a high temperature fluid to flow out of the first circulation space, and a low temperature fluid that causes a low temperature fluid to flow into the second circulation space are provided on the side wall of the casing. A low-temperature fluid outlet through which a low-temperature fluid flows out from the inlet and the second circulation space is formed so as to penetrate therethrough, and the heat transfer is performed between the high-temperature fluid flowing through the first circulation space and the low-temperature space flowing through the second circulation space. Heat exchange through the plate.

  By the way, the plate-type heat exchanger as described above forms a heat transfer plate by bending a single strip metal plate. Generally, the strip metal plate is coiled and supplied from a metal manufacturer. If an attempt is made to manufacture a heat exchanger that is larger than the width of the coil in order to increase the exchange capacity, it is necessary to request a custom band metal plate from the metal manufacturer, which increases the cost.

  Moreover, the said heat exchanger plate is used in order to increase the efficiency of heat exchange between the first circulation space and the second circulation space, and a thin plate is used. Since there is only a heat transfer plate inside, there is a risk that the rigidity of the entire heat exchanger will be reduced.

  In order to avoid this, it is conceivable to increase the heat exchange capacity by using a plurality of plate heat exchangers as described above.

Japanese Patent No. 5090515 (paragraphs 0017 to 0024, FIGS. 1 to 3)

  However, in the plate heat exchanger as in Patent Document 1, piping is connected to each of the high-temperature fluid inlet, the high-temperature fluid outlet, the low-temperature fluid inlet, and the low-temperature fluid outlet. A large space is required to install the heat exchanger, and other facilities cannot be installed in the space.

  The present invention has been made in view of such points, and an object of the present invention is to use a plate heat exchanger in which a heat transfer plate is formed by bending a single band-like metal plate into a pleat shape. Another object of the present invention is to provide a heat exchange device that is compact, has a large heat exchange capacity, and is low in cost.

  In order to achieve the above object, the present invention is characterized in that a plurality of plate heat exchangers as disclosed in Patent Document 1 are arranged side by side, and the way of connecting the plate heat exchangers is devised. .

That is, in the first invention, a heat transfer plate formed by bending a single band-shaped metal plate into a pleat shape is accommodated in a rectangular parallelepiped metal casing, and the casing is filled with high-temperature fluid. A high temperature fluid inlet and a high temperature for partitioning the first high temperature fluid space into the second distribution space where low temperature fluid flows and the casing side wall facing the heat transfer plate on the first flow space side allow the high temperature fluid to flow in and out. A low temperature fluid inlet and a low temperature fluid outlet for allowing the low temperature fluid to flow in and out are provided on both end sides in the width direction of the heat transfer plate on the casing side wall facing the heat transfer plate on the second circulation space side. A plurality of plate-type heat exchangers having the same shape that exchange heat between the high-temperature fluid that flows through the first circulation space and the low-temperature fluid that flows through the second circulation space via the heat transfer plate 4 extend in parallel. One of the straight, One metallic first same shape forming a rectangular cross section of the rectangular tube-shaped, second, and third and fourth pipe, in part, the heat exchanger side in the first to fourth pipe Connection holes corresponding to the number of the heat exchangers are formed at equal intervals in the longitudinal direction of each pipe, and each of the heat exchangers is in a direction intersecting the width direction of the heat transfer plate, and each of the high temperature fluid inlets, While the high-temperature fluid outlet, each low-temperature fluid inlet and each low-temperature fluid outlet are arranged side by side, the first and second pipes overlap the casing side wall facing the heat transfer plate on the first circulation space side, The third and fourth pipes overlap the casing side wall facing the heat transfer plate on the second circulation space side, and the connection holes of the first pipes are connected to the high-temperature fluid inlets. each connection hole above each hot fluid outlet pipe, the connection hole of the third pipe is above the low A fluid inlet, and wherein said fourth the first to fourth piping so that are connected each connection hole of the pipe is above the low-temperature fluid outlet is detachably secured to the casing.

In a second invention, in the first invention, a through hole to which a pipe can be connected is formed at one end in the longitudinal direction of the first to fourth pipes, respectively, and the first and third pipes While the through holes of the first and third pipes are fixed to the casings in a posture facing one end side in the parallel direction of the heat exchanges, the second and fourth pipes are connected to the second and fourth pipes. Each through hole is fixed to each casing so as to face the other end side in the juxtaposition direction of each heat exchange .

  In the first invention, by arranging a plurality of plate heat exchangers having a predetermined heat exchange capacity in parallel, the heat exchange capacity of the entire apparatus is increased. Therefore, a heat transfer plate is formed with a custom-made band metal plate. There is no need to increase the heat exchange capacity, and the manufacturing cost can be reduced. Moreover, since adjacent plate type heat exchangers are connected by the first to fourth pipes and sandwiched between the first to fourth pipes, the rigidity of the entire apparatus can be increased. Furthermore, since there are only four pipes, the first to fourth pipes, for a plurality of plate heat exchangers, the arrangement of the pipes for each plate heat exchanger does not become complicated, and the entire apparatus is compactly installed. Space can be used effectively. In addition, since the first to fourth pipes can be removed from the plate heat exchangers, assembly and disassembly can be performed regardless of location, and transportation costs can be reduced by disassembling and transporting. .

Moreover , the types of parts in the heat exchange device can be reduced, and the manufacturing cost can be further reduced.

It is a perspective view of the heat exchange apparatus which concerns on embodiment of this invention. It is a disassembled perspective view of the heat exchange apparatus which concerns on embodiment of this invention. It is sectional drawing in the AA of FIG. It is sectional drawing in the BB line of FIG. It is the C section enlarged view of FIG. The two heat exchange devices according to the embodiment of the present invention are connected one above the other, (a) is a front view, (b) is a view from arrow D of (a), (c) is The E arrow view of (a), (d) shows the F arrow view of (a).

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following description of the preferred embodiment is merely exemplary in nature.

  1 and 2 show a heat exchange device 1 according to an embodiment of the present invention. The heat exchange device 1 is used to use waste heat of hot air generated by a dryer installed in a cleaning factory, a hospital, or the like, and includes five plate heat exchangers 2, four first pipes 3a, 2 piping 3b, 3rd piping 3c, and 4th piping 3d are provided.

  As shown in FIGS. 3 and 4, the heat exchanger 2 includes a rectangular parallelepiped iron casing 4 extending in the horizontal direction.

  The casing 4 includes a casing body 41 having a rectangular cross section having a rectangular cross section, and a pair of closing plates 42 that closes both openings of the casing body 41. Each of the closing plates 42 has a plurality of screw insertion holes 42a. Is formed through (see FIG. 5).

  The casing body 41 includes a casing side wall 41a positioned on the upper side, a casing side wall 41b positioned on the lower side, and a pair of casing side walls 41c that connect both long side edges of the casing side wall 41a and the casing side wall 41b. It has become.

  A rectangular first inlet 43 (high temperature fluid inlet) through which high temperature air (high temperature fluid) flows into one end side in the longitudinal direction of the casing side wall 41a, and a rectangular first inlet through which the high temperature air flows out to the other end side. One outlet 44 (hot fluid outlet) is formed.

  On the other hand, a rectangular second outlet 46 (cold fluid outlet) through which low temperature air (cold fluid) flows out is provided at one end side in the longitudinal direction of the casing side wall 41b, and a rectangular shape through which low temperature air is introduced into the other end side. The second inlet 45 (cold fluid inlet) is formed.

  Inside the casing 4 is accommodated a heat transfer plate 5 formed by bending one strip-shaped steel plate into a pleat so that the width direction of the heat transfer plate 5 coincides with the longitudinal direction of the casing 4. Yes. In FIG. 4, the thickness of the heat transfer plate 5 is exaggerated for convenience.

  A rubber seal member 5a having a U-shaped cross section is fitted to both ends in the longitudinal direction of the heat transfer plate 5, and the seal member 5a fitting portion at one end in the longitudinal direction of the heat transfer plate 5 is one casing side wall. While being fixed to the inner surface of 41c with the fixing plate 5b, the sealing member 5a fitting part of the other end of the heat transfer plate 5 in the longitudinal direction is being fixed to the inner surface of the other casing side wall 41c with the fixing plate 5b.

  A rectangular pressing plate 6 and a sealing plate 7 are arranged in order from the opening side on the inside of the casing body 41 near both ends in the longitudinal direction.

  Each of the seal plates 7 is a heat-resistant highly elastic member made of silicon rubber, closes an opening near the inside of the casing main body 41, and is in contact with the width direction end of the heat transfer plate 5.

  In addition, on the side of the closing plate 42 of the pressing plate 6, iron bushes 8 are fixed at positions corresponding to the respective screw insertion holes 42a.

  The bush 8 includes a cylindrical portion 8a in which a female screw is threaded on an inner peripheral surface, and an annular plate portion 8b extending annularly in the radial direction from one end in the cylindrical center direction of the cylindrical portion 8a.

  A coil spring 9 is wound around the cylindrical portion 8a. One end of the coil spring 9 is in contact with the inner surface of the closing plate 42 and the other end is in contact with the annular plate portion 8b.

  The screw 11 is inserted into the screw insertion hole 42a, and the pressing plate 6 is fixed to the closing plate 42 by screwing the male screw of the screw 11 with the female screw of the cylindrical portion 8a. .

  When the screw 11 is tightened, the pressing plate 6 moves to the closing plate 42 side against the urging force of the coil spring 9 together with the bush 8, while when the screw 11 is loosened, the urging force of the coil spring 9 together with the bush 8 is moved. It moves in a direction away from the closing plate 42.

  The closing plate 42 is fixed to the casing body 41 in a state where the screw 11 is tightened and the pressing plate 6 is moved to the closing plate 42 side, and the closing plate 42 is fixed to the casing body 41. When 11 is loosened, the pressing plate 6 presses the seal plate 7 against the width direction end of the heat transfer plate 5 by the biasing force of the coil spring 9, and the inside of the casing 4 is in the first distribution space S1 and the second distribution space S2. The first distribution space S1 and the second distribution space S2 are kept airtight.

  And the casing side wall 41a in the said casing main body 41 opposes the 1st distribution space S1 side of the heat exchanger plate 5, and the casing side wall 41b opposes the 2nd distribution space S2 side of the heat exchanger plate 5. FIG.

  Furthermore, each said heat exchanger 2 is the same shape, and as shown in FIG.1 and FIG.2, in the horizontal direction which cross | intersects the width direction of the said heat exchanger plate 5, each said 1st inlet 43, each The first outlet 44, each second inlet 45, and each second outlet 46 are juxtaposed so as to be adjacent to each other.

  The said 1st piping 3a-4th piping 3d are the same shapes, and have comprised the rectangular tube shape of the cross-sectional rectangle extended in parallel with the parallel arrangement direction of each heat exchanger 2. As shown in FIG.

A first connection hole 31 (through hole) that can be connected to the pipes 10a to 10d of the dryer is formed through one end in the longitudinal direction of the first pipe 3a to the fourth pipe 3d. On one of the side surfaces of the fourth pipe 3d, five rectangular second connection holes 32 are formed at equal intervals along the longitudinal direction of the first pipe 3a to the fourth pipe 3d.

The first piping 3a is arranged such that the first connection hole 31 overlaps the casing side wall 41a in a posture in which the first connection hole 31 faces one end side in the juxtaposition direction of the heat exchangers 2, and the second connection holes 32 are respectively It is detachably fixed above each casing 4 so as to be connected to the first inlet 43 of the heat exchanger 2.

Further, the second pipe 3b is arranged such that the first connection hole 31 overlaps the casing side wall 41a in a posture in which the first connection hole 31 faces the other end side in the parallel arrangement direction of the heat exchangers 2 and the second connection holes 32. Is detachably fixed above each casing 4 so as to be connected to the first outlet 44 of each heat exchanger 2.

Further, the third pipe 3c is arranged such that the first connection hole 31 overlaps the casing side wall 41b in a posture in which the first connection hole 31 faces one end side in the juxtaposition direction of the heat exchangers 2 and the second connection holes 32 are formed. Removably fixed below the casing 4 so as to be connected to the second inlet 45 of the heat exchanger 2.

In addition, the fourth pipe 3d includes the second connection holes so that the first connection holes 31 overlap the casing side wall 41b in a posture in which the first connection holes 31 face the other end in the parallel arrangement direction of the heat exchangers 2. 32 is detachably fixed to the lower side of each casing 4 so as to be connected to the second outlet 46 of each heat exchanger 2.

  The high-temperature air introduced from the pipe 10a into the first pipe 3a passes through the second connection holes 32 and the first inlets 43 of the heat exchangers 2 from the first pipe 3a. While flowing into the first circulation space S1, it is discharged to the second pipe 3b through the first outlet 44 and each second connection hole 32 of each heat exchanger 2, and is discharged from the second pipe 3b to the pipe 10b. (See arrow X1 in FIG. 3).

  On the other hand, the low-temperature air introduced into the third pipe 3c from the pipe 10c passes through the second connection holes 32 and the second inlets 45 of the heat exchangers 2 from the third pipe 3c. 2 flows into the distribution space S2 and is discharged to the fourth pipe 3d through the second outlet 46 and the second connection holes 32 of each heat exchanger 2, and is discharged from the fourth pipe 3d to the pipe 10d. (See arrow X in FIG. 3).

  And in each said heat exchanger 2, the high temperature air which distribute | circulates the said 1st distribution space S1 and the low temperature fluid which distribute | circulates the said 2nd distribution space S2 come to heat-exchange via the said heat exchanger plate 5. Yes.

  As described above, according to the embodiment of the present invention, by arranging a plurality of plate heat exchangers 2 having a predetermined heat exchange capacity in parallel, the heat exchange capacity of the entire heat exchange device 1 is increased. Thus, it is not necessary to form the heat transfer plate 5 to increase the heat exchange capacity, and the manufacturing cost can be reduced.

  Moreover, since the adjacent plate type heat exchanger 2 is connected by the 1st piping 3a-the 4th piping 3d, respectively, and since it is pinched | interposed into the said 1st piping 3a-4th piping 3d, the rigidity of the heat exchanger 1 whole is made Can be increased.

  Furthermore, there is only one straight pipe (first pipe 3a to fourth pipe 3d) for each first inlet 43, each first outlet 44, each second inlet 45, and each second outlet 46. Therefore, the arrangement of the pipes (the first pipe 3a to the fourth pipe 3d) with respect to each plate heat exchanger 2 is not complicated, and the entire heat exchange device 1 can be made compact and the installation space can be used effectively.

  In addition, since the first pipe 3a to the fourth pipe 3d can be detached from the heat exchangers 2, the assembly and disassembly can be performed at any place, and the transportation cost can be reduced by disassembling and transporting. Can do.

  And since each heat exchanger 2 is the same shape and the 1st piping 3a-4th piping 3d are the same shape, the kind of components in the heat exchange apparatus 1 can be decreased, and manufacturing cost can further be suppressed.

  In addition, the heat exchange apparatus 1 of this invention can connect and use two or more, for example, in FIG. 6 (a)-(d), the said heat exchange apparatus 1 is connected up and down two. ing.

  Each of the heat exchange devices 1 has a posture in which the juxtaposed direction of the heat exchangers 2 is in the horizontal direction, and the heat exchange devices 1 are juxtaposed vertically in the same posture.

  On one end side of the heat exchangers 2 in the heat exchange device 1 in the side-by-side direction, a fifth pipe 3e and a sixth pipe 3g each having a rectangular cross section extending in the up-down direction are connected to each heat in the heat exchange device 1. On the other end side in the side-by-side direction of the exchanger 2, there are provided a seventh pipe 3f and an eighth pipe 3h having a rectangular tube shape with a rectangular cross section extending vertically.

  The fifth pipe 3 e is connected to the first connection hole 31 of the first pipe 3 a in each heat exchange device 1 by a connection pipe 34, and the sixth pipe 3 g is the third pipe 3 c of the heat exchange device 1. The connection pipe 35 is connected to the one connection hole 31.

  The seventh pipe 3f is connected to the first connection hole 31 of the second pipe 3b in each heat exchange device 1 by a connection pipe 36, and the eighth pipe 3h is the fourth pipe 3d in each heat exchange device 1. The first connection hole 31 is connected by a connection pipe 37.

  A third connection hole 33 that can be connected to the pipes 10a to 10d is formed through the upper ends of the fifth pipe 3e to the eighth pipe 3h.

  Thus, since the heat exchange apparatus 1 of the present invention can connect a plurality of pieces with a simple structure, the heat exchange apparatus 1 has high expandability and can further increase the heat exchange capacity while suppressing the manufacturing cost. In addition, in FIG. 6, although the two heat exchange apparatuses 1 are connected up and down, you may connect 3 or more, and you may connect in parallel by arranging two or more in the horizontal direction.

  Further, in the embodiment of the present invention, five heat exchangers 2 are arranged in parallel in one heat exchange device 1, but not limited to this, two to four heat exchangers 2 are arranged in parallel. Alternatively, six or more may be provided side by side.

  Moreover, although the heat exchange apparatus 1 in the embodiment of the present invention performs heat exchange between the high-temperature air and the low-temperature air, it can also perform heat exchange between the high-temperature liquid and the low-temperature liquid.

  Further, in the embodiment of the present invention, high-temperature air is introduced into the first pipe 3a and discharged from the second pipe 3b, but may be introduced from the second pipe 3b and discharged from the first pipe 3a.

  In the embodiment of the present invention, low-temperature air is introduced into the third pipe 3c and discharged from the fourth pipe 3d, but may be introduced from the fourth pipe 3d and discharged into the third pipe 3c.

Moreover, in embodiment of this invention, although the heat exchanger 2 and the 1st piping 3a-4th piping 3d are formed with the steel plate, they may be formed with an aluminum alloy material and may be formed with a stainless steel material. Good .

Also, the heat exchange device 1 of the present invention has been used in waste heat utilization of the dryer, it is also applicable to use of waste heat other amenities.

  The present invention is suitable for a heat exchange device that exchanges heat between a high-temperature fluid and a low-temperature fluid circulated inside a casing via a heat transfer plate.

DESCRIPTION OF SYMBOLS 1 Heat exchange apparatus 2 Plate type heat exchanger 3a 1st piping 3b 2nd piping 3c 3rd piping 3d 4th piping 4 Casing 5 Heat-transfer plate
10a, 10b, 10c, 10d piping
31 1st connection hole (through hole)
32 2nd connection hole 41a, 41b, 41c Casing side wall 43 1st inlet (high temperature fluid inlet)
44 First outlet (high temperature fluid outlet)
45 Second inlet (Cryogenic fluid inlet)
46 Second outlet (Cryogenic fluid outlet)
S1 1st distribution space S2 2nd distribution space

Claims (2)

A heat transfer plate formed by bending one strip-shaped metal plate into a pleat shape is housed in a rectangular parallelepiped metal casing and a first flow space in which high-temperature fluid flows through the casing and a low temperature A high-temperature fluid inlet and a high-temperature fluid outlet for dividing the high-temperature fluid into and out of the casing side wall, which is partitioned into a second circulation space through which the fluid circulates and faces the heat transfer plate on the first circulation space side, are provided in the second circulation. The casing side wall facing the space-side heat transfer plate is provided with a low-temperature fluid inlet and a low-temperature fluid outlet through which the low-temperature fluid flows in and out at both ends in the width direction of the heat transfer plate, and flows through the first distribution space. A plurality of plate-type heat exchangers of the same shape that exchange heat through the heat transfer plate and the high-temperature fluid that flows through the second circulation space;
Four straight lines extending in parallel and having the same shape of the first, second, third, and fourth pipes in the shape of a rectangular tube with a rectangular cross section ,
In one of the side surfaces of the first to fourth pipes, connection holes corresponding to the number of the heat exchangers are formed at equal intervals in the longitudinal direction of each pipe,
The heat exchangers are arranged side by side in the direction intersecting the width direction of the heat transfer plate, and the hot fluid inlets, hot fluid outlets, cold fluid inlets, and cold fluid outlets are adjacent to each other. ,
The first and second pipes overlap the casing side wall facing the heat transfer plate on the first circulation space side, while the third and third pipes overlap the casing side wall facing the heat transfer plate on the second circulation space side. 4 pipes overlap each other, and each connection hole of the first pipe is connected to each high temperature fluid inlet, each connection hole of the second pipe is connected to each high temperature fluid outlet, and each connection hole of the third pipe is connected to each other. above the low-temperature fluid inlet, and wherein said fourth the first to fourth pipes each connection hole pipe to so that each connected to the respective low-temperature fluid outlet is detachably secured to the casing Heat exchange device. The heat exchange device according to claim 1,
At one end in the longitudinal direction of the first to fourth pipes, through holes that can connect the pipes are respectively formed,
The first and third pipes are fixed to the casings in such a posture that the through holes of the first and third pipes face one end side in the parallel arrangement direction of the heat exchanges, while the second and fourth pipes are fixed. The pipe is fixed to each casing in such a manner that the through holes of the second and fourth pipes face the other end side in the parallel arrangement direction of the heat exchanges.

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