JP3045643B2 - Heat exchanger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to a plate-type heat exchanger for performing heat exchange between different types of fluids.

[0002]

2. Description of the Related Art Conventionally, as one type of heat exchanger, a plate type heat exchanger using a partition plate made of a synthetic resin in order to enhance corrosion resistance against salt and the like has been known. In this type of heat exchanger, by laminating a large number of partition plates in the thickness direction, a first flow path for passing the first fluid and a second flow path for passing the second fluid are alternately formed between the partition plates. doing. Then, heat exchange is performed between the first fluid and the second fluid via these partition plates.

Therefore, in this type of heat exchanger, a method of increasing the heat exchange efficiency and reducing the thickness of each partition plate to increase the number of partition plates has been adopted. The key point is how to make the seal.

Conventionally, as shown in FIG. 11, for example, a sealing material 2 such as rubber is sandwiched between each partition plate 1 near the edge of the partition plate 1 and bolts 3 are used to separate the partition plate 1.
Can be sealed by tightening
Alternatively, as shown in FIG. 12, the edge portions 5 of the partition plate 4 are bent and laminated, and the overlapping edge portions 5 are joined with an adhesive to perform sealing, or as shown in FIG. A ridge-shaped uneven portion 8 is formed by bending a part thereof, and the partition plates 7 are stacked on each other while the positions of the upper and lower uneven portions 8 are alternately shifted.
A seal structure has also been proposed in which the uneven portion 8 located at the edge of the partition is bonded to the partition plate 7 on the other side.

[0005]

However, FIG.
In the case of the conventional example shown in (1), in order to obtain a desired sealing pressure, pressure must be applied by the bolts 3 in the thickness direction of the partition plate 1, so that the partition plate 1 made of synthetic resin is deformed and the sealing performance is improved. Not only is reduced, but also the partition plate 1 itself may be adversely affected by deformation.

On the other hand, in the case of the conventional sealing structure shown in FIG. 12, since it is necessary to bond the peripheral edges of a large number of partition plates 4, an enormous bonding step is required, and the stability of the sealing portion is lacking. However, there is a problem that a leak easily occurs. Also, in the case of the seal structure shown in FIG. 13, since it is necessary to bond the peripheral edges of a large number of partition plates 7, an enormous bonding step is required, the stability of the seal portion is lacking, and leakage is likely to occur. There is a problem.

Further, any of the above-mentioned prior arts requires a special connection structure and a sealing measure at a connection portion between the fluid inlet / outlet pipe and each flow path, which requires time and labor for the assembling process, and easily causes leakage. There was a problem. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a plate-type heat exchanger in which measures for sealing are easy and heat exchange efficiency is high.

[0008]

According to the present invention, which has been developed to achieve the above object, a plurality of first partition plates made of synthetic resin or the like and a plurality of second partition plates are alternately arranged in the thickness direction. A heat transfer unit in which a first flow path for flowing the first fluid and a second flow path for flowing the second fluid are alternately formed between the partition plates by stacking, and the heat transfer unit are accommodated. In a heat exchanger having a casing, at least a pair of first fluid communication ports for allowing the first fluid to flow through the casing and at least a pair of second fluid communication ports for allowing the second fluid to flow are provided. The first partition plate is provided with a corrugated plate-like heat transfer portion comprising a peak and a valley along the direction in which the fluid flows, and the second partition plate is provided with a second plate.
The partition plate is also provided with a corrugated plate-like heat transfer portion composed of peaks and valleys along the flow direction of the fluid, and the first flow between the partition plates is formed by aligning the tips of the peaks and valleys of the partition plates with each other. A large number of rectangular cross-section spaces used as passages or second passages are formed in parallel with each other, and the edges of the oblique sides of the partition plates facing the first fluid passage are connected to the first fluid passage. On the other hand, the opening edge is opened so as to communicate with the first flow path, and the edges of the partition plates are connected to the first fluid flow port.
To form a shape that closes the second flow path by bonding
And the oblique side of each of the partition plates facing the second fluid communication port.
Is an opening edge that opens in a shape that allows the second flow path to communicate with the second fluid flow port, and an edge of each partition plate.
The first flow path is closed with respect to the second fluid flow port by bonding them together, and the space between the edge of each partition plate and the inner surface of the casing faces each of the fluid flow ports.
The seal is sealed by a sheet-like sealing material sandwiched between the edge of the partition plate and the casing at a portion other than the bonded oblique side portion .

[0009]

The first fluid introduced into the casing from the first fluid flow port flows into only the first flow path from the opening edge of each partition plate inside the first fluid flow port. The second fluid introduced into the casing from the second fluid flow port flows into only the second flow path from the opening edge of each partition plate inside the second fluid flow port. Thus, the first fluid flowing through the first flow path and the second fluid flowing through the second flow path exchange heat via the partition plate in the corrugated heat transfer section. The first fluid after the heat exchange flows out of the casing from the opening edge on the outlet side through the first fluid communication port on the outlet side. The second fluid flows out of the casing through the second fluid flow port from the opening edge on the outlet side.

In the present invention, since the sheet-like sealing material is provided between the inner surface of the casing and the edge of each partition plate, no excessive pressure is applied in the thickness direction of the partition plate. In addition, sealing of a large number of partition plates is easily performed.

As described in claim 2, the peak angle of each of the peaks and valleys of the heat transfer section is substantially 90 °, and the first squares formed between the peaks and valleys of each partition plate are substantially square. If the torsional ribbons are accommodated in the flow path and the second flow path, the fluid flowing in each flow path can be swirled, and heat exchange between the flow paths can be performed more effectively. Also, fluid loss is small.

Further, if a rectifying fin is provided in a rectifying portion between the opening edge of the partition plate and the corrugated heat transfer portion, the fluid introduced from the fluid flow port can be transferred to the heat transfer portion. And the efficiency of heat exchange can be increased.

According to a fourth aspect of the present invention, one first fluid communication port and the second fluid communication port are provided adjacent to each other at one end of the partition plate, and the other first fluid communication port is provided at the other end of the partition plate. And the second fluid communication ports are provided adjacent to each other, and the rectifying fins of each rectifying section are provided obliquely from the end of the heat transfer section toward each of the fluid communication ports. Can be set.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. Heat exchanger 10 of the present embodiment
Is a heat transfer unit 11 partially shown in FIGS. 1 and 2, and a casing 12 (FIGS.
8) and the like.

The casing 12 has a box-shaped hollow body 15
And one of the first fluid communication port 16 and the second fluid communication port 17 provided adjacent to one end of the body 15 in a Y-shape.
And the other first fluid communication port 18 and second fluid communication port 19 provided on the other end side of the body portion 15 so as to be adjacent to each other in a Y shape.
And The rectangular parallelepiped body 15 is provided with the left and right side walls 2.
It has a sealed internal space surrounded by the upper and lower walls 22 and 24 and the upper wall 23 and the lower wall 24.

As shown in FIG. 8, each of the distribution ports 16, 1
Reference numerals 7, 18, and 19 respectively communicate with the inside of the casing 12. An end wall 25 is provided between one of the first fluid communication ports 16 and the second fluid communication port 17. An end wall 26 is also provided between the other first fluid communication port 18 and second fluid communication port 19.

The casing 12 is made of a synthetic resin or metal having corrosion resistance to a fluid. Casing 12
As an example of the material described above, polycarbonate having a thickness of about several mm is preferable, but the type of material may be appropriately selected according to required specifications such as required strength, moldability, and cost.

The heat transfer unit 11 housed in the casing 12 has a plurality of first partition plates 31 and a plurality of second partition plates 32 alternately stacked in the thickness direction. Then, between the partition plates 31 and 32, first flow paths 35 through which the first fluid flows and second flow paths 36 through which the second fluid flows are formed alternately.

The material of the partition plates 31 and 32 is preferably a synthetic resin such as vinyl chloride or polycarbonate. The material may be appropriately selected according to required specifications such as required strength, moldability or cost. Depending on the type of fluid, a corrosion-resistant metal plate such as stainless steel may be used. Partition plate 3 used for one heat exchanger 10
The number of sheets 1 and 32 is several tens to several hundreds.

The first partition plate 31 has a corrugated heat transfer section 40,
Rectifying sections 41 and 42 located on both ends of the heat transfer section 40 are provided. The corrugated heat transfer section 40 includes a plurality of peaks 45 and valleys 46 provided in parallel with each other along the direction in which the fluid flows. As shown in FIG. 9, the apex angle θ of the peak 45 and the valley 46 is approximately 90 °, but the tip of the peak 45 and the tip of the valley 46 are respectively arc-shaped curved surfaces.

As shown in FIG. 1, the first partition plate 31 has two straight side portions 50 and 51 parallel to each other and oblique portions 52 and 5.
3, 54, 55 and both ends 56, 57.
A flange-shaped edge 60 is provided on the entire periphery of the first partition plate 31 without interruption.

More specifically, on both sides 50 and 51 of the partition plate 31, edges 61 located on the front left half and the rear right half with respect to the longitudinal center of the partition plate 31 are formed by the heat transfer portion 40. It stands at the same height as the upper end of the mountain 45.
On the other hand, the edges 63 located on the front right half and the rear left half of the partition plate 31 are at the same height as the bottom of the valley 46. The upper edge 61 and the lower edge 63 having different heights as described above.
Is a step-like continuous portion 6 at the longitudinal center of the partition plate 31.
5 is continuous without interruption.

The upper edge 61 further extends from both sides 50, 51 of the partition plate 31 to both ends 56, 5 through oblique sides 53, 55.
7 and are connected to the lower edge 63 via a step-like connecting portion 67 at the center of both ends 56 and 57.

The second partition plate 32 also has a corrugated heat transfer section 70.
And rectifying sections 71 and 7 located at both ends of the heat transfer section 70.
2 are provided. The corrugated plate-like heat transfer section 70 includes a plurality of peaks 75 provided in parallel with each other along the direction in which the fluid flows.
And a valley 76. As shown in FIG.
The apex angle of the valley 76 is approximately 90 °, but the tip of the peak 75 and the tip of the valley 76 are respectively arc-shaped curved surfaces.

As shown in FIG. 1, similarly to the first partition plate 31, the second partition plate 32 has linear side portions 80, 81, oblique portions 82, 83, 84, 85, and both end portions 86, 87. And A flange-like edge 90 is provided around the second partition plate 32 without interruption.

More specifically, in the side portions 80 and 81 of the partition plate 32, the edges 91 located at the front right half and the rear left half with respect to the longitudinal center of the partition plate 32 are formed of the heat transfer portion 70. It stands at the same height as the upper end of the mountain 75.
On the other hand, the edges 93 located on the front left half and the rear right half of the partition plate 32 have the same height as the bottom of the valley 76. The upper edge 91 and the lower edge 93 having different heights as described above.
Is a step-like continuous portion 9 at the longitudinal center of the partition plate 32.
5 is continuous without interruption.

The upper edge 91 further extends from both sides 80, 81 of the partition plate 32 to both ends 86, 8 through oblique sides 82, 84.
7 and is connected to the lower edge 93 via a step-shaped connecting portion 97 at the center of both ends 86 and 87.

The first partition plate 31 and the second partition plate 32 are shown in FIG.
As shown in the figure, the upper surfaces of the upper edges 61 and 91 and the lower surfaces of the lower edges 93 and 63 are stacked in a state where they abut each other. When the partition plates 31 and 32 are overlapped in this way,
The space between the upper surfaces of the upper edges 61 and 91 and the lower surfaces of the lower edges 93 and 63 is closed, but the space between the lower surfaces of the upper edges 61 and 91 and the upper surfaces of the lower edges 93 and 63 is open. become.

Accordingly, the edges 60, 90 of the partition plates 31, 32
Are located on the sides facing the first fluid communication ports 16 and 18 (the oblique sides 52,
54, 82, 84), the first fluid flow ports 16, 1
The opening 100 is formed by opening the first fluid passage 8 and the first flow passage 35 so as to communicate with each other, and serves as a closed edge for closing the second flow passage 36 with respect to the first fluid flow ports 16 and 18. Only at the closed edge, the edges 63, 9 of the first partition plate 31 and the second partition plate 32 to prevent leakage.
1 are adhered to each other by an adhesive.

Further, the edges 60 and 90 of the partition plates 31 and 32 are
Sides facing the second fluid flow ports 17 and 19 (oblique sides 53 and 5)
5, 83, 85), the second fluid flow ports 17, 19
The opening 110 is formed by opening the first flow path 35 and the second flow path 36 so as to communicate with each other, and serves as a closed edge that closes the first flow path 35 with respect to the second fluid flow ports 17 and 19. Only at the closed edge, the edges 61, 9 of the first partition plate 31 and the second partition plate 32 to prevent leakage.
3 are adhered to each other by an adhesive.

When the partition plates 31 and 32 are alternately overlapped as described above, as shown in FIG.
The tip of the valley 46 and the tip of the valley 76 and the tip of the peak 75 of the other partition plate 32 correspond to each other, so that the partition plate 31, 32 can be used as the first flow path 35 or the second flow path 36. Are formed in parallel with each other.

Since the peak angles of the peaks 45, 75 and the valleys 46, 76 are all about 90 °, the peaks 45, 75 and the valleys 46, 76
The first flow path 35 and the second flow path 36 formed between the first and second are substantially square. The first flow path 35 and the second flow path 36 accommodate a helical torsion ribbon 120 for causing the fluid to swirl. As shown in FIG. 10, the torsion ribbon 120 has, for example, a shape in which a synthetic resin plate is twisted, and is accommodated in a posture along the first flow path 35 and the second flow path 36.

The rectifying sections 41 and 42 of the first partition plate 31 include:
A plurality of rectifying fins 125 that extend obliquely from the end of the heat transfer section 40 toward the above-described opening 100 are provided in parallel with each other. The rectifying fins 125 are provided on the partition plate 3.
Part 1 is formed into a rib shape, and is provided along the direction in which the first fluid flows.

The rectifying sections 71 and 72 of the second partition plate 32 also
A plurality of rectifying fins 130 extending obliquely from the end of the heat transfer section 70 toward the opening 110 are provided in parallel with each other. The rectifying fins 130 are also formed by forming a part of the partition plate 32 into a rib shape, and are provided along the direction in which the second fluid flows.

As shown in FIGS. 8 and 9, the partition plates 31, 32
A sheet-like sealing material 140 is provided between the edges 60 and 90 of the casing 12 and the inner surface of the casing 12. This sealing material 1
Reference numeral 40 denotes a portion excluding the distribution ports 16, 17, 18, and 19, that is, both side portions 50, 51, 80, and 81 of the partition plates 31, 32.
And between the side walls 21 and 22 of the casing 12 and between the end portions 56, 57, 86 and 87 of the partition plates 31 and 32 and the end walls 25 and 26 of the casing 12. The seal member 140 is provided over the entire inner surfaces of the side walls 21 and 22 of the casing 12 and the entire inner surfaces of the end walls 25 and 26.

The sealing material 140 is made of a sponge-like sealing material of closed cells such as urethane or an elastic elastomer, and is press-fitted between the inner surface of the casing 12 and the partition plates 31 and 32. This sealing material 14
0, the edges 61, 63, 9 of the respective partition plates 31, 32
1 and 93 are sealed with the casing 12 to prevent leakage between the first flow path 35 and the second flow path 36.

A sealing material having the same shape as the outer shape of the partition plates 31 and 32 is provided between the upper surface of the heat transfer unit 11 and the upper wall 23 of the casing 12 and between the lower surface of the heat transfer unit 11 and the lower wall 24 of the casing 12. By sandwiching 140, pressure is applied to alleviate the unevenness of the partition plates 31 and 32, and leakage between the upper wall 23 and the lower wall 24 and the heat transfer unit 11 is prevented.

Next, the operation of the heat exchanger 10 having the above configuration will be described. From the first fluid communication port 16 to the casing 12
The first fluid introduced into the inside of the
It flows into the flow path 35, passes through the rectifying section 41, and the corrugated heat transfer section 40
Is led to. Since the second flow path 36 is closed at the first fluid flow port 16, the first fluid flows through the second flow path 36.
Will not flow into Then, the first fluid that has passed through the corrugated heat transfer unit 40 flows out of the outlet-side rectifying unit 42 through the outlet-side opening 100 and the first fluid communication port 18.

The second fluid is introduced into the inside of the casing 12 from the second fluid flow port 19, flows into the second flow path 36 from the opening 110, and is guided to the corrugated heat transfer section 70 through the rectification section 71. I will Since the first flow path 35 is closed at the second fluid flow port 19, the second fluid does not flow into the first flow path 35. The second fluid that has passed through the corrugated plate-like heat transfer section 70 flows from the outlet-side rectifying section 72 to the outlet-side opening 1.
It flows out through 10 and the second fluid passage 17. In this way, the two types of fluids having a temperature difference flowing through the first flow path 35 and the second flow path 36 form the partition plates 31 and 32 in the rectifying sections 41, 42, 71 and 72 and the corrugated heat transfer sections 40 and 70. Heat is efficiently exchanged through the heat exchanger.

In this embodiment, since the sheet-like sealing material 140 is sandwiched between the inner surface of the casing 12 and the edges 60 and 90 of the partition plates 31 and 32, the casing 12 is press-fitted.
The sealing of the side surfaces of the partition plates 31, 32 can be performed easily and reliably without applying pressure in the thickness direction of the partition plates 31, 32.

Further, since a sheet-like sealing material 140 having the same shape as the outer shape of the partition plates 31 and 32 is sandwiched and pressed between the inner surface of the casing 12 and the upper and lower surfaces of the heat transfer unit 11, the casing 12 is partitioned from the casing 12. Sealing between the plates 31 and 32 is also easily and reliably performed.

The portions that need to be adhered may be substantially only the closed ends of the oblique sides 52 to 55 of the first partition plate 31 and the oblique sides 82 to 85 of the second partition plate 32. Can be done.

The peaks 45 and 75 and the valleys 46 and 76 of the heat transfer sections 40 and 70 are set to have a vertex angle of about 90 °, so that the first flow path 35 and the second flow path 36 which are formed in a substantially square shape are formed. Accommodates the twisted ribbons 120 in the respective channels 3
The fluid flowing through 5, 36 can be swirled,
Heat exchange can be performed more effectively.

The rectifiers 41, 42, 71, 72
By providing the fins 125 and 130, the distribution port 1
Fluid flowing between the heat transfer units 40, 70 and the heat transfer units 40, 70 can be evenly distributed, and the heat exchange efficiency can be further increased. In addition, there is a high degree of freedom in designing the projecting directions and mounting angles of the flow ports 16, 17, 18, 19 with respect to the flow paths 35, 36, and it is possible to flexibly cope with various piping systems. Note that two or more sets of the inlet-side fluid communication port and the outlet-side fluid communication port may be provided.

[0045]

According to the present invention, it is easy to take measures against sealing of each partition plate, and it is possible to efficiently perform heat exchange. Further, the first fluid and the second fluid introduced from the fluid flow ports can be reliably guided to the first flow path and the second flow path, respectively, and the structure of the communicating portion between the fluid flow port and each flow path can be simplified. Therefore, it is easy to take measures to seal the fluid flow port. Also,
The mounting direction and angle of the fluid flow port with respect to the casing can be set freely.

[Brief description of the drawings]

FIG. 1 is a perspective view of a first partition plate and a second partition plate used in a heat exchanger according to one embodiment of the present invention.

FIG. 2 is a perspective view of a part of a heat transfer unit using the partition plate shown in FIG.

FIG. 3 is a sectional view taken along the line aa in FIG. 2;

FIG. 4 is a side view of the heat transfer unit shown in FIG. 2;

FIG. 5 is a side view of a first partition plate and a second partition plate of the heat transfer unit shown in FIG. 2;

FIG. 6 is a plan view showing an example of a heat exchanger.

FIG. 7 is a side view of the heat exchanger shown in FIG. 6;

FIG. 8 is a cross-sectional view of the heat exchanger shown in FIG.

FIG. 9 is a sectional view taken along the line bb in FIG. 8;

FIG. 10 is a side view showing a part of the twist ribbon.

FIG. 11 is a sectional view showing a part of a conventional heat exchanger.

FIG. 12 is a cross-sectional view showing a part of another conventional heat exchanger.

FIG. 13 is a cross-sectional view showing a part of another conventional heat exchanger.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Heat exchanger 11 ... Heat transfer unit 12 ... Casing 16 ... 1st fluid communication port (inlet side) 17 ... 2nd fluid communication port (outlet side) 18 ... 1st fluid communication port (outlet side) 19 ... 2nd Fluid flow port (inlet side) 31 First partition plate 32 Second partition plate 35 First flow path 36 Second flow path 40 Corrugated heat transfer sections 41 and 42 Rectification section 45 Mountain 46 Valley 60 ... Edge 70 ... Corrugated plate heat transfer part 71, 72 ... Rectification part 75 ... Mountain 76 ... Valley 90 ... Edge 100, 110
... Opening 120 ... Twisted ribbons 125, 130
… Rectifying fin 140… Seal material

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Takeshi Fuse 2-49, Numame, Isehara-shi, Kanagawa Prefecture Inside of Japan Hakko Co., Ltd. (56) References JP-A-5-248782 (JP, A) 175 937 (JP, U) Japanese Utility Model 2-21484 (JP, U) Japanese Patent Publication No. 4-1276 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) F28D 9/00 F28F 3/06 F28F 3/08 301 F28F 3/10

Claims (4)

(57) [Claims] 1. A first flow path through which a first fluid flows between these partition plates by alternately stacking a plurality of first partition plates and a plurality of second partition plates in a thickness direction, and a second fluid. And a casing accommodating the heat transfer unit, wherein at least one pair for allowing the first fluid to flow through the casing is provided. And a second fluid flow port is provided.
At least one pair of second fluid flow ports for flowing a fluid is provided, and the first partition plate is provided with a corrugated plate-like heat transfer portion composed of peaks and valleys along a direction in which the fluid flows, and the second partition is provided. The plate also has a corrugated plate-like heat transfer portion composed of peaks and valleys along the flow direction of the fluid, and the first flow path is provided between the partition plates by aligning the tips of the peaks and valleys of the partition plates with each other. Alternatively, a large number of rectangular channel cross-sectional spaces used as the second channel are formed in parallel to each other, and the edges of the oblique sides of the partition plates facing the first fluid channel are positioned with respect to the first fluid channel. The opening edge is opened in a shape to communicate the first flow path, and the second flow path is closed by bonding the edges of the partition plates to the first fluid flow port. Facing two-fluid outlet
The edge of the oblique side of each of the partition plates is an opening edge that opens in a shape that allows the second flow passage to communicate with the second fluid flow port, and the edges of the partition plates are adhered to each other to form the second fluid. The first flow path is closed with respect to the flow port, and the partition between the edge of each of the partition plates and the inner surface of the casing except at the bonded oblique side facing the fluid flow port. A heat exchanger characterized by being sealed by a sheet-like sealing material sandwiched between an edge of a plate and the casing. 2. The substantially square first flow path formed between the peaks and valleys of each partition plate, wherein the apex angle of each of the peaks and valleys of the corrugated heat transfer section is substantially 90 °. The heat exchanger according to claim 1, wherein a spiral torsion ribbon for generating a swirl is accommodated in the second flow path along the flow path. 3. A rectifying portion is provided between the opening edge of the partition plate and the corrugated heat transfer portion, and the rectifying portion has a plurality of rectifying portions formed by forming a part of the partition plate into a rib shape. The heat exchanger according to claim 1, wherein the fins are provided in parallel with each other along a direction in which the fluid flows. 4. A first fluid communication port and a second fluid communication port are provided adjacent to each other on one end side of the partition plate.
The other first fluid communication port and the second fluid communication port are provided adjacent to each other at the other end of the partition plate, and the rectifying portions are provided at both ends of the partition plate, respectively, and the rectifying fins are connected to the transmission fins at the opposite ends. The heat exchanger according to claim 3, wherein the heat exchanger is disposed obliquely from an end of the heating section toward each fluid flow port.