Heat exchanger

The present invention relates to a heat exchanger that exchanges heat between two fluids. In the present specification, one of the two fluids that exchange heat is referred to as a first fluid, and the other is referred to as a second fluid.

Many ideas have been provided for heat exchangers. The problems with heat exchangers are mainly heat exchange rate, heat resistance, pressure resistance, liquid leakage, manufacturing cost, and the like.

An example of an idea that has been proposed to overcome the above problems is shown below. For example, Patent Document 1 discloses a heat exchanger in which an aluminum flat plate and fins are laminated to exchange heat with a coolant, which has excellent pressure resistance, does not leak, and has a good heat exchange rate.

Further, Patent Document 2 discloses a heat exchanger capable of effectively using exhaust gas, which includes a pipe for circulating water in a meandering or spiral manner about the flow direction of exhaust gas.

Further, in Patent Document 3, a metallic inner tube is inserted inside the metallic outer tube along the longitudinal direction of the outer tube, and the minimum non-freezing temperature of the inner wall surface of the inner tube is significantly lowered. It discloses a heat exchanger that makes this possible.

Further, Patent Document 4 discloses a heat exchanger in which an outer tube and an inner tube are twisted in a spiral shape to improve a heat exchange rate.

Further, Patent Document 5 discloses a heat exchanger in which the first inner tube is spirally wound around the outer peripheral surface of the second inner tube and integrated to realize a high heat exchange rate at low cost.

Further, Patent Document 6 discloses a heat exchanger in which a cooling liquid chamber is partitioned by surrounding a cooling pipe from an outer peripheral surface to improve layout and reduce weight.

Further, in Patent Document 7, the first flow path and the second flow path are alternately arranged via the disk-shaped heat transfer surface having a plurality of layers, and the flow paths are connected in parallel to form a disk shape. Disclosed is a heat exchanger that suppresses the adhesion of calcium carbonate on the wall surface of a flow path by rotating the heat transfer surface around the central axis and changing the position relative to the adjacent heat transfer surface. ing.

<p num="0010"><patcit num="1"><text>Japanese Patent Application Laid-Open No. 6-273085</text></patcit><patcit num="2"><text>JP 2006-127784</text></patcit><patcit num="3"><text>JP 2001-263969</text></patcit><patcit num="4"><text>JP 2010-38429</text></patcit><patcit num="5"><text>JP 2009-24969</text></patcit><patcit num="6"><text>JP 2000-38963</text></patcit><patcit num="7"><text>JP 2010-71553</text></patcit></p>

<p num="0011"> By the way, there is still a high demand for improving the heat exchange rate in the above-mentioned heat exchanger, and many companies and individuals are continuing their research.</p><p num="0012"> Therefore, an object of the present invention is to provide a heat exchanger that exhibits high performance in terms of heat resistance, pressure resistance, liquid leakage, heat exchange rate, etc. at a low manufacturing cost and compactly.</p>

<p num="0013"> The present invention has been conceived in view of the above object. Stacked n sheets (n is<u style="single">5</u>With a laminated plate assembly having plates of any natural number (constant) satisfying n, Two of the n plates adjacent to each other form a hollow portion between the two plates. Of the n plates, the (2x-1) th plate (x is a variable that is an arbitrary natural number satisfying 2x n) counted in the direction from one end to the other end in the stacking direction. Formed between and the 2xth plate<u style="single">2</u>Of the above first hollow portions, the first hollow portion closest to the one end in the stacking direction includes a first opening leading to the outside of the laminated plate assembly. Said<u style="single">2</u>Of the above first hollow portions, the first hollow portion closest to the other end in the stacking direction includes a second opening leading to the outside of the laminated plate assembly.<u style="single"> Before</u>Note: Of the first hollow parts of 2 or more, two first hollow parts adjacent to each other are connected to each other.<u style="single">Then, the fluid that has passed through the first hollow portion of the two first hollow portions near the one end in the stacking direction is passed through the two first hollow portions in the stacking direction. Let it flow into the first hollow near the other end</u>With a first bypass, Of the n plates, the second y-th plate (y is a variable that is an arbitrary natural number satisfying 2y + 1 n) counting from one end in the stacking direction toward the other end). Formed between and the (2y + 1) th plate<u style="single">2</u>Of the above second hollow portions, the second hollow portion closest to the one end in the stacking direction includes a third opening leading to the outside of the laminated plate assembly. Said<u style="single">2</u>Of the above second hollow portions, the second hollow portion closest to the other end in the stacking direction includes a fourth opening leading to the outside of the laminated plate assembly.<u style="single"> Before</u>Note: Of the two or more second hollow parts, two second hollow parts adjacent to each other are connected to each other.<u style="single">Then, the fluid that has passed through the second hollow portion of the two second hollow portions near the other end in the stacking direction is passed through the two second hollow portions in the stacking direction. Let it flow into the second hollow near one end</u>With a second bypass, The first hollow portion and the second hollow portion are separated from each other so that a fluid does not flow between the first hollow portion and the second hollow portion. Each of the one or more first bypasses is along the outer surface of the second hollow portion located between the two first hollow portions connected to each other by the first bypass in the direction of the stacking. Arranged as Each of the one or more second bypasses penetrates the inside of the first hollow portion located between the two second hollow portions connected to each other by the second bypass in the direction of the stacking. Placed in A heat exchanger is provided (first embodiment).</p><p num="0014"> Further, in the first embodiment described above, A hollow tube-shaped casing that houses the laminated plate assembly and extends in the direction of the lamination is provided. The hollow portion of the casing is separated by the laminated plate assembly into a hollow portion located on the one end side and a hollow portion located on the other end side in the laminating direction. The first opening is connected to the outside of the casing via a third bypass that penetrates the wall surface of the casing. The second opening is connected to the outside of the casing via a fourth bypass that penetrates the wall surface of the casing. The third opening opens with respect to the hollow portion of the hollow portion of the casing located on the one end side thereof. The fourth opening opens with respect to the hollow portion of the hollow portion of the casing located on the other end side. The configuration may be adopted (second embodiment).</p><p num="0015"> Further, in the second embodiment described above, A part of each wall surface of the one or more first bypasses is the wall surface of the casing. The configuration may be adopted (third embodiment).</p><p num="0016"> Further, in the second or third embodiment described above, A fan is provided in the casing to generate a fluid flow in the direction of the stacking. The configuration may be adopted (fourth embodiment).</p><p num="0017"> Further, in any of the above-mentioned second to fourth embodiments, Penetrates through the inside of the laminated plate assembly in the direction of lamination so as to connect between the hollow portion of the hollow portion of the casing located on the one end side and the hollow portion located on the other end side. With any of the first hollow portion, the first bypass, the second hollow portion and the second bypass excluding the second hollow portion connected through the fourth opening. It is provided with a tubular body that forms a flow path that is separated so that fluid does not flow between them. The configuration may be adopted (fifth embodiment).</p><p num="0018"> In addition, in any of the above-mentioned first to fifth embodiments, Of the n plates, any natural number satisfying the (2p-1) th (p is (2p-1) n) counted from one end in the stacking direction toward the other end. Of the two or more plates located in the variable), at least two adjacent plates have the same shape and The two plates having the same shape are laminated in a state of being rotated by a predetermined angle around one axis extending in the direction of the lamination from a position where the shapes match when viewed in the direction of the lamination. The configuration may be adopted (sixth embodiment).</p><p num="0019"> Further, in any of the above-described first to sixth embodiments, Two or more of the n plates located at the 2qth position (q is a variable that is an arbitrary natural number satisfying 2q n) counting from one end to the other end in the stacking direction. At least two of the plates adjacent to each other have the same shape and The two plates having the same shape are laminated in a state of being rotated by a predetermined angle around one axis extending in the direction of the lamination from a position where the shapes match when viewed in the direction of the lamination. The configuration may be adopted (seventh embodiment).</p><p num="0020"> Further, in the sixth or seventh embodiment described above, For each of the n plates, the shape of the outer edge of the plate projected in the direction of the one axis is such that the shapes before and after the rotation by the predetermined angle around the one axis match. is there The configuration may be adopted (eighth embodiment).</p><p num="0021"> Further, in any of the above-described first to eighth embodiments, n = 2m (m is a constant that is an arbitrary natural number that satisfies 2 m), Positioned at the (2r-1) th position (r is a variable that is an arbitrary natural number satisfying r m) counting from one end to the other end in the stacking direction of the two plates. The first hollow is fixed to each other by fixing the plate to be formed and the plate located at the 2rth position in the direction from one end in the stacking direction to the other end of the two plates. Along with forming the portions, a plate set located at the r-th position in the direction from one end to the other end in the stacking direction is formed. A plate located in the sth (s is a variable that is an arbitrary natural number satisfying (s + 1) m) counted in the direction from one end to the other end in the stacking direction of the plate set. The set and the plate set located at the (s + 1) th position in the direction from one end in the stacking direction to the other end of the plate set are between the two plate sets. The second hollow portion is formed by crimping the two plate sets to the sealing material arranged in. The configuration may be adopted (9th embodiment).</p><p num="0022"> In addition, in any of the above-mentioned first to ninth embodiments, With respect to at least one of the first hollow portion and the second hollow portion, the direction from the center of the hollow portion to the outer edge.<u style="single">Stretches to and flows through the hollow part</u>Fluid flow<u style="single">Regulate and lengthen the flow path of the fluid</u>Equipped with a partition plate The configuration may be adopted (tenth embodiment).</p>

<p num="0023"> According to the heat exchanger according to the first embodiment of the present invention, for example, the bypass forming the first fluid flow path is outside the plate, and the bypass forming the second fluid flow path is the plate. Since it is arranged inside, the inflow and outflow directions of the fluid are such that the first fluid flows in and out almost perpendicularly to the stacking direction of the plates, and the second fluid flows in and out along the stacking direction of the plates. The degree of freedom is high.</p><p num="0024"> Further, according to the heat exchanger according to the second embodiment of the present invention, since the casing in the shape of a hollow tube is provided, the laminated plate assembly can be easily positioned by arranging the laminated plate assembly at a predetermined position in the casing. Can be done.</p><p num="0025"> Further, according to the heat exchanger according to the third embodiment of the present invention, since a part of the wall surface of the casing also serves as a part of the wall surface of the first bypass, for example, the heat exchanger is opened from the inside with respect to the outer surface.<u style="single">space</u>The first bypass can be formed by arranging the plate group forming the above in the casing, and the cost of forming the bypass can be reduced.</p><p num="0026"> Further, according to the heat exchanger according to the fourth embodiment of the present invention, the fan can generate a fluid flow in the casing in the direction of stacking.</p><p num="0027"> Further, according to the heat exchanger according to the fifth embodiment of the present invention, even if one end of the casing is not open, one of the casings in the axial direction passes through the second hollow portion. The fluid flowing from one end to the other can flow to one end through a tubular body that penetrates the interior of the laminated plate assembly in the direction of lamination, allowing heat exchange between the fluids. it can.</p><p num="0028"> Further, according to the heat exchanger according to the sixth or seventh embodiment of the present invention, each of the plurality of plates is arranged in a positional relationship in which they are rotated at appropriate angles with respect to the stacking direction. Road formation takes place. Therefore, for example, by laminating plates of the same shape in which the inflow port and the outflow port are arranged at positions deviated by a predetermined angle by rotating around the axis by the predetermined angle, the hollow portions easily and directly arranged can be separated from each other. A flow path can be formed.</p><p num="0029"> Further, according to the heat exchanger according to the eighth embodiment of the present invention, a plurality of plates rotated by a predetermined angle with respect to the stacking direction have the same shape and overlap when viewed in the axial direction. By rotating and laminating the plates so that their shapes are the same, positioning between the plates can be easily performed.</p><p num="0030"> Further, according to the heat exchanger according to the ninth embodiment of the present invention, an arbitrary number of plate sets integrated by fixation such as welding are laminated, and they are crimped inward in the lamination direction. A heat exchanger can be realized. Therefore, the heat exchange efficiency can be easily changed by changing the number of plate sets.</p><p num="0031"> Further, according to the heat exchanger according to the tenth embodiment of the present invention, since the fluid flows in the hollow portion so as to bypass the partition plate, high heat exchange efficiency can be obtained.</p>

<figref num="1">FIG. 1 is a diagram conceptually showing an image of a fluid flow in a heat exchanger according to an embodiment of the present invention.</figref><figref num="2">FIG. 2 is a diagram showing the flow of fluid in the laminated plate assembly of the heat exchanger according to the embodiment of the present invention.</figref><figref num="3">FIG. 3 is a cross-sectional view and a plan view of one of the two types of plates constituting the laminated plate assembly of the heat exchanger according to the embodiment of the present invention.</figref><figref num="4">FIG. 4 is a cross-sectional view and a plan view of the other of the two types of plates constituting the laminated plate assembly of the heat exchanger according to the embodiment of the present invention.</figref><figref num="5">FIG. 5 is a diagram illustrating an outline of a cross section of a plate set constituting the laminated plate assembly of the heat exchanger according to the embodiment of the present invention.</figref><figref num="6">FIG. 6 is a perspective view of a modified example of a plate constituting the laminated plate assembly of the heat exchanger according to the embodiment of the present invention.</figref><figref num="7">FIG. 7 is a diagram showing a fluid flow in a modified example of the laminated plate assembly of the heat exchanger according to the embodiment of the present invention.</figref><figref num="8">FIG. 8 is a diagram conceptually showing an image of the flow of fluid in the heat exchanger according to a modification of the embodiment of the present invention.</figref><figref num="9">FIG. 9 is a diagram showing the flow of fluid in the laminated plate assembly of the heat exchanger according to a modification of the embodiment of the present invention.</figref>

(Embodiment) Hereinafter, embodiments that are a specific example of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing the outline of the heat exchanger 1 according to the present embodiment and conceptually showing the state of the flow of the fluid flowing through the heat exchanger 1.

The heat exchanger 1 includes a laminated plate assembly 11 having a plurality of laminated plates, and a hollow tube-shaped casing 12 that houses the laminated plate assembly 11 and extends in the direction of the lamination.

The laminated plate assembly 11 is centered on a plurality of laminated plates 111 as shown in FIG. 2, a sealing material 112 for preventing a fluid flow from leaking from the flow path, and a plurality of plates 111. It has a fixing tool 113 to be fastened in. The encapsulant 112 is composed of an O-ring 1121 arranged in a ring-shaped recess 11151 on the inner side when viewed from the central axis, and an elastic cord 1122 arranged in a notch 11152 provided along the outer edge of the plate 111. Will be done. The material of the sealing material 112 is, for example, silicon rubber, but the material is not limited thereto.

The number of plates 111 can be arbitrarily changed. In FIG. 1, eight plates 111 are used, and in FIG. 2, six plates 111 are used.

In each figure, the left-right direction is the stacking direction of the plates 111. Hereinafter, without particular notice, the direction of stacking means the direction from the right side to the left side in each figure.

As described above, the number of plates 111 constituting the laminated plate assembly 11 can be arbitrarily changed, but the six plates 111 are used in the laminated plate assembly 11 unless otherwise specified. And. Also, if it is necessary to distinguish those plates 111 from each other, the first plate 111 is the plate 111-1, the second plate 111 is the plate 111-2, ..., The sixth plate 111 in the stacking direction. With a branch code, such as plate 111-6.

The plates 111 are made of stainless steel, for example, and are common in that they all have a substantially disk shape having the same diameter, but the odd-numbered plate 111 and the even-numbered plate 111 in the stacking direction have the same shape. Is different. Hereinafter, the odd-numbered plate 111 is referred to as a right-side plate 111, and the even-numbered plate 111 is referred to as a left-side plate 111.

FIG. 3 is a cross-sectional view and a plan view showing the shape of the right side plate 111. The right side plate 111 is provided with a through hole 1111 provided at the center position of the substantially disk shape so as to penetrate in the direction of stacking, and a substantially rectangular shape penetrating the outer edge portion of the substantially disk shape so as to penetrate in the direction of stacking. Notch 1112 and<u style="single">For example</u>Elongated in the radial direction of the approximately disk shape<u style="single">、</u>It has a through hole 1113 provided so as to penetrate in the direction of stacking.

Through hole 1111 accepts the insertion of fastener 113. The notch 1112 constitutes a part of the first bypass, which is the flow path of the first fluid flowing from the back side to the front side in the plan view of FIG. The through hole 1113 constitutes a part of the second bypass which is the flow path of the second fluid flowing from the front side to the back side in the plan view of FIG.

As shown in the cross-sectional view of FIG. 3, the right plate 111 has an inner wall 1114 that rises in a ring shape from the outer edge of the through hole 1111 in the direction opposite to the stacking direction, and the stacking direction from the outer edge of the right plate 111. It has an outer wall 1115 that rises in a ring shape in the opposite direction. On the front side surface of the outer wall 1115 when viewed in the stacking direction, recesses 11151 which are depressed in the stacking direction are provided along the outer edge of the right side plate 111 so as to form a ring when viewed in the stacking direction. An O-ring 1121 is arranged in the recess 11151.

Further, the outer wall 1115 is provided with a notch 11152 that does not penetrate in the stacking direction so as to scrape the front side corner portion of the outer edge portion of the right side plate 111 as viewed in the stacking direction. The notch 11152 is substantially ring-shaped as a whole when viewed in the direction of lamination, but is divided by the notch 1112. Notch 11152<u style="single">Elastic string 1122</u>Is placed.

A hollow portion 1116 that opens toward the front in the plan view of FIG. 3 is formed between the inner wall 1114 and the outer wall 1115. The hollow portion 1116 serves as a flow path for the second fluid flowing from the front side to the back side in the plan view of FIG.

Further, the right side plate 111 is provided with a partition wall 1117 extending in the radial direction so as to connect the inner wall 1114 and the outer wall 1115. The partition wall 1117 prevents the second fluid flowing from the front side to the back side in the plan view of FIG. 3 from directly flowing into the through hole 1113. Due to the partition wall 1117, the second fluid flows into the through hole 1113 after flowing in an arc around the direction of the arrow in the plan view of FIG. 3, that is, the direction of stacking. ..

By the way, the plate 111-1 is not provided with the partition wall 1117. This is because the partition wall 1117 is unnecessary because the plate 111 does not exist on the upstream side of the second fluid from the plate 111-1. However, plate 111-1 may have a partition wall 1117. In that case, since the plate 111-1 and the other right side plate 111 can have the same shape, the manufacturing cost of them can be reduced at the time of mass production.

FIG. 4 is a cross-sectional view and a plan view showing the shape of the left side plate 111. The left side plate 111 is provided with a through hole 2111 provided at the center position of the substantially disk shape so as to penetrate in the direction of stacking, and a substantially rectangular shape penetrating the outer edge portion of the substantially disk shape in the direction of lamination. Notch 2112 and<u style="single">For example</u>Elongated in the radial direction of the approximately disk shape<u style="single">、</u>It has a through hole 2113 provided so as to penetrate in the direction of stacking.

Through hole 2111 accepts the insertion of fastener 113. The notch 2112 constitutes a part of the first bypass, which is the flow path of the first fluid flowing from the back side to the front side in the plan view of FIG. The through hole 2113 constitutes a part of the second bypass which is the flow path of the second fluid flowing from the front side to the back side in the plan view of FIG.

As shown in the cross-sectional view of FIG. 4, the left side plate 111 has an inner wall 2114 that rises in a ring shape in the direction opposite to the stacking direction from the outer edge portion of the through hole 2111, and the stacking direction from the outer edge portion of the left side plate 111. It has an outer wall 2115 that rises in the opposite direction. The outer wall 2115 is generally ring-shaped when viewed in the direction of lamination, but the position of the notch 2112, the position of about 20 degrees to the right of the center of the substantially disk shape of the left plate 111 from that position, and the position of the notch 2112. The left side plate 111 is divided at a position of about 180 degrees to the right of the center of the substantially disk shape.

As shown in the plan view of FIG. 4, a notch 2118 is provided so as to penetrate the outer wall 2115 in the radial direction at a position about 20 degrees clockwise from the notch 2112 to the center of the left side plate 111. The notch 2118 is a first fluid flow path that flows from the front side of the left side plate 111 to another left side plate 111 arranged further to the front side in the plan view of FIG.<u style="single">1</u>Form part of the bypass.

Further, a notch 2119 is provided at a position about 180 degrees to the right of the center of the left side plate 111 from the notch 2112 so as to penetrate the outer wall 2115 in the radial direction. The notch 2119 is provided to secure a flow path of the first liquid flowing in the direction of the arrow on the front side of the left side plate 111 in the plan view of FIG.

A hollow portion 2116 that opens toward the front in the plan view of FIG. 4 is formed between the inner wall 2114 and the outer wall 2115. The hollow portion 2116 is shown in the plan view of FIG.<u style="single">Back side</u>From<u style="single">Front side</u>It becomes the flow path of the first fluid flowing to.

Further, the left side plate 111 is provided with a partition wall 2117 that rises in the direction opposite to the stacking direction so as to surround the outer edge of the through hole 2113. The partition wall 2117, together with the inner wall 2114, flows into the hollow portion 2116 from the back side in the plan view of FIG. 4 and the second fluid flowing through the through hole 2113 from the front side to the back side in the plan view of FIG. The flow paths are partitioned so that the first fluid flowing from 2118 to the front side does not mix, and the first fluid arcs around the axis of the arrow in the hollow portion 2116, that is, the direction of stacking. It plays a role of guiding the flow to draw.

The right side plate 111 and the left side plate 111 adjacent to each other are positioned after being positioned in the direction of stacking so that the through hole 1111, the through hole 2111, and the through hole 1113 and the through hole 2113 are connected to each other. Welded, for example, to seal the passage of fluid between the contact surfaces of the back surface of the right plate 111 (the back surface in the plan view of FIG. 3) and the front surface of the hand of the left plate 111 (the front surface of the hand in the plan view of FIG. 4). Is fixed by. FIG. 5 is a cross-sectional view of a plate set 20 composed of the right side plate 111 and the left side plate 111 thus fixed. The welding position is indicated by W in FIG.

Below, when it is necessary to distinguish the plate sets 20 from each other, the first plate set 20 is the plate set 20-1, the second plate set 20 is the plate set 20-2, and the third plate set 20 is the third plate set 20 in the stacking direction. Add a branch code as in plate set 20-3.

These plurality of plate sets 20 are overlapped in the stacking direction, and are fixed in a predetermined position in the casing 12 by being sandwiched by the casing 12 so as to be pressed from the outside to the inside in the stacking direction (see FIG. 1). At that time, the sealing material 112 is sandwiched between the adjacent plate sets 20 and crimped to the plate sets 20, and as a result, the contact surfaces of the plate sets 20 are sealed.

The casing 12 has a tubular right side tube 121 arranged upstream in the stacking direction and a tubular left side tube 122 arranged downstream in the stacking direction to sandwich the laminated plate assembly 11 in the stacking direction. And the ring-shaped spacer ring 123 arranged between the right side tube 121 and the outer edge of the upstream end of the laminated plate assembly 11, and between the left side tube 122 and the outer edge of the downstream end of the laminated plate assembly 11. It is a ring-shaped body that locks the joint between the right side pipe 121 and the left side pipe 122 by sandwiching the spacer ring 124 of the ring-shaped body to be arranged and the laminated plate assembly 11 via the spacer ring 123 and the spacer ring 124. It is equipped with a lock ring 125.

The spacer ring 123 is provided with a through hole through which the first fluid flowing out from the inside (hollow portion 2116) of the plate set 20 located at the upstream end in the stacking direction in the laminated plate assembly 11 penetrates the wall surface of the casing 12. There is a notch 1231 that forms part of a third bypass that leads to the outside of the casing 12.

The spacer ring 124 is provided with a first fluid from the outside of the laminated plate assembly 11 into the interior (hollow portion 2116) of the plate set 20 located at the downstream end of the laminated plate assembly 11 in the direction of lamination. A notch 1241 is provided which forms a part of a fourth bypass leading to the outside of the casing 12 through a through hole penetrating the wall surface of the casing 12.

The contact surfaces between the spacer ring 123 and the right side pipe 121, the contact surface between the spacer ring 124 and the laminated plate assembly 11, and the contact surface between the spacer ring 124 and the left side pipe 122 are respectively. An O-ring made of, for example, silicone rubber, which functions as a sealing material to prevent fluid from passing between them, is arranged.

Further, on the outside of the through hole provided on the wall surface of the casing 12 so as to lead to the notch 1231 of the spacer ring 123, a third bypass which is a flow path for flowing the first fluid from the laminated plate assembly 11 is provided. The outflow pipe 127, which is a tubular body forming a part of the above, is attached. Similarly, outside the through hole provided in the wall surface of the casing 12 so as to pass through the notch 1241 of the spacer ring 124, a fourth flow path for flowing the first fluid into the laminated plate assembly 11. An inflow pipe 126, which is a tubular body forming a part of the bypass, is attached.

In addition, in FIG. 1, it is shown that the inflow pipe 126 and the outflow pipe 127 are arranged on the same straight line extending in the direction of stacking on the outer surface of the casing 12, but in reality, the direction of stacking is shown. The positions of the inflow pipe 126 and the outflow pipe 127 may be different from each other. Since the angle between the notch 2112 which constitutes the inflow port of the first fluid and the notch 2118 which constitutes the outflow port in one plate set 20 is about 20 degrees, for example, the laminated plate assembly 11 is constructed. If there are three plate sets 20, the positions of the inlet and outlet of the first fluid will be offset by about 60 degrees in the direction of stacking.

By the way, when a plurality of laminated plate sets 20 are tightened and fixed inward in the stacking direction only at the outer edge by the right side pipe 121 and the left side pipe 122, they bulge in the stacking direction near the central axis for some reason. Deformation is likely to occur. When such deformation occurs, a gap is created between the partition wall 1117 of the right side plate 111 and the back surface of the left side plate 111 facing it, and a hollow portion of the second fluid is formed between the plate sets 20. Part 1116 does not draw an arc as shown by the arrow in the plan view of FIG. 3, but flows directly from the gap into the through hole 1113, which is not desirable because sufficient heat exchange efficiency cannot be obtained. In order to avoid such a problem, a fastener 113 is attached near the center of the laminated plate assembly 11 when viewed in the direction of lamination, and the fastener 113 directs the plurality of plate sets 20 inward in the direction of lamination. It is designed to be tightened.

The fastener 113 is, for example, a stainless steel bolt and nut. When the laminated plate assembly 11 is viewed in the laminating direction, a through hole penetrating in the laminating direction is formed near the center. This through hole is formed by connecting the through hole 1111 of the right side plate 111 and the through hole 2111 of the left side plate 111. After the bolts of the fastener 113 are passed through the through holes formed in the laminated plate assembly 11, they are tightened by nuts to fix the stacking direction near the center of the plurality of plate sets 20.

The above is the description of the configuration of the heat exchanger 1.

Subsequently, a state in which heat exchange is performed between the first fluid and the second fluid in the heat exchanger 1 will be described.

The first fluid and the second fluid are fluids having a temperature difference from each other. Hereinafter, as an example, it is assumed that the first fluid has a relatively low temperature and the second fluid has a relatively high temperature.

The first fluid is press-fitted into the inflow pipe 126 from the outside at a predetermined pressure (see FIG. 1). The first fluid press-fitted into the inflow pipe 126 passes through a fourth bypass composed of the inflow pipe 126, the notch 1241 of the spacer ring 124, and the notch 2112 of the plate 111-6 to the plate 111-6. It flows into the hollow portion 2116 (first hollow portion) between the plates 111-5.

As shown in FIG. 2, the first fluid that has flowed into the hollow portion 2116 (first hollow portion) between the plates 111-6 and the plate 111-5 is about 340 degrees in the hollow portion 2116. After flowing in an arc, the plate 111 passes through a first bypass composed of the notch 2118 of the plate 111-6, the notch 1112 of the plate 111-5, and the notch 2112 of the plate 111-4. It flows into the hollow portion 2116 (first hollow portion) between -4 and plate 111-3.

The first fluid that has flowed into the hollow portion 2116 between the plates 111-4 and 111-3 flows through the hollow portion 2116 in an arc of about 340 degrees, and then the plate 111-4. Hollow section 2116 between plate 111-2 and plate 111-1 through a first bypass consisting of notch 2118, notch 1112 on plate 111-3, and notch 2112 on plate 111-2. It flows into the first hollow part).

The first fluid that has flowed into the hollow portion 2116 between the plates 111-2 and the plate 111-1 flows through the hollow portion 2116 in an arc of about 340 degrees, and then the plate 111-2. It flows out of the heat exchanger 1 through a third bypass consisting of the notch 2118, the notch 1112 of the plate 111-1, the notch 1231 of the spacer ring 123, and the outflow pipe 127 (see FIG. 1).

A part of the wall surface of the fourth bypass and the first bypass is composed of a part of the wall surface of the casing 12.

On the other hand, the second fluid is supplied so as to be pressurized and flow from the upstream side to the downstream side in the stacking direction when viewed from the laminated plate assembly 11 in the casing 12. As shown in FIG. 2, the second fluid, which is pressurized and flows from the upstream side in the stacking direction, is a bypass composed of the through hole 1113 of the plate 111-1 and the through hole 2113 of the plate 111-2. It flows through the hollow portion 1116 (second hollow portion) between the plates 111-2 and 111-3.

The second fluid that flowed into the hollow portion 1116 (second hollow portion) between the plates 111-2 and 111-3 flowed through the hollow portion 1116 in an arc of about 340 degrees. Later, a hollow portion 1116 (second) between plate 111-4 and plate 111-5 passes through a second bypass composed of through hole 1113 of plate 111-3 and through hole 2113 of plate 111-4. (Hollow part) flows into.

The second fluid that flowed into the hollow portion 1116 (second hollow portion) between the plates 111-4 and 111-5 flowed through the hollow portion 1116 in an arc of about 340 degrees. After that, the fluid flows downstream from the laminated plate assembly 11 in the casing 12 through a bypass composed of the through hole 1113 of the plate 111-5 and the through hole 2113 of the plate 111-6.

As described above, the first fluid sequentially flows through the flow paths in the plurality of hollow portions 2116 (first hollow portions) connected in series by the first bypass, and at the same time, the second fluid flows in the second. Heat conduction from the second fluid to the first fluid through each plate 111 while sequentially flowing through the flow paths in the plurality of hollow portions 1116 (second hollow portions) connected in series by the bypass of. Will be done. As a result, heat exchange occurs between the first fluid and the second fluid.

In order to form the flow path for the first fluid and the second fluid as described above, as shown in FIG. 2, the plate set 20-2 is used as opposed to the plate set 20-1. In addition, the plate set 20-3 needs to be arranged so as to be offset by about 20 degrees to the left around the central axis in the stacking direction (the axis passing through the center of the plate set 20) with respect to the plate set 20-2. There is.

As described above, according to the heat exchanger 1, the heat exchanger 1 is arranged so as to bite in the middle of the pipe forming the flow path of the second fluid, and the direction of the flow of the second fluid. By press-fitting the first fluid into the inflow pipe 126 that opens substantially vertically, heat exchange between the first fluid and the second fluid can be performed. Therefore, as compared with the case where the heat exchanger is provided outside the pipe forming the second fluid flow path, for example, the pipe is simple and the arrangement of the heat exchanger 1 requires a lot of space. Nor.

The first fluid flows out from the outflow pipe 127 which opens in a direction substantially perpendicular to the flow direction of the second fluid. Therefore, when connecting the circulation flow path of the first fluid to the heat exchanger 1, it is easy to manage the circulation flow path.

Further, the heat exchange capacity of the heat exchanger 1 can be easily changed by changing the number of plate sets 20 used for the heat exchanger 1. Further, to assemble the heat exchanger 1, it is only necessary to stack a plurality of plate sets 20 and fix them with the fastener 113 and then install them in the casing 12, and the assembly, disassembly, cleaning, etc. can be easily performed in a short time. It can be performed.

(Modification example) The above-described embodiment can be variously modified within the scope of the technical idea of the present invention. An example of such a modification is shown below.

In the above-described embodiment, as shown in FIG. 4, a notch 2119 is provided in the outer wall 2115 of the left side plate 111. This notch 2119 is provided to secure the flow path of the first fluid in the hollow portion 2116. For example, the flow of the first fluid is shortened by shortening the radial length of the through hole 2113. If sufficient roads are secured, the notch 2119 may not be provided (see Figure 6).

Further, in the above-described embodiment, by lengthening the flow paths of the first fluid and the second fluid, the time for heat exchange when the flow velocity of these fluids is constant is lengthened, and the heat exchanger 1 The heat exchange capacity of is enhanced. By lengthening the flow path of the fluid in this way, the heat exchange capacity can be enhanced, but the resistance when the fluid flows also increases. Therefore, for example, when the viscosity of the first fluid is high, the force required for press-fitting may become too high. In such a case, in order to reduce the resistance of the first fluid, the shapes of the left side plate 111 and the right side plate 111 are changed to the shapes shown in FIG. 7, and the inflow port of the first fluid in the plate set 20 is changed. A configuration may be adopted in which the position and the position of the outlet are shifted by about 180 degrees around the central axis of the plate set 20.

Further, the heat exchanger 1 may be configured so as to include a fan in the casing 12 that causes a second fluid flow in the direction of the above-mentioned stacking. According to the heat exchanger 1 having such a configuration, the rotation of the fan causes a flow in the second fluid, so that it is difficult to arrange a device for press-fitting the second fluid to the outside, for example. Can also perform heat exchange.

The term "fan" in the present specification shall mean a fluid pressurizing device in a broad sense including various propellers, impellers, compressors, and the like.

Further, the plate 111 and the casing 12 have a substantially disk-like shape when viewed in the laminating direction, but the shapes can be arbitrarily changed. For example, assuming that the shape of the plate 111 and the casing 12 when viewed in the stacking direction is approximately an octadecagon, when positioning the plate sets 20 adjacent to each other, the shapes and positions are the same when viewed in the stacking direction. If one of those plate sets 20 arranged in is rotated around the central axis in the direction of stacking so that the corresponding vertices of the regular octagon are shifted by one, the deviation of exactly 20 degrees can be realized. it can.

In this way, by defining the shape of the plate 111 so that the plate 111 has the same shape when rotated about the central axis by an angle similar to the angle at which the plate sets 20 are shifted, the positioning between the plate sets 20 becomes easy. At that time, the plate 111 is not limited to a regular polygon, and any shape that has the same shape when rotated by a predetermined angle may be adopted.

In the above-described embodiment, the adjacent plate sets 20 are arranged so as to be rotated by about 20 degrees around the central axis, but the angle can be arbitrarily changed. When the angle is reduced, the cross-sectional area of the second bypass, which is the flow path of the first fluid, is reduced, while the flow paths of the first fluid and the second fluid can be lengthened, and the heat conversion capacity is increased. Can be enhanced. On the other hand, if the angle is increased, the heat conversion capacity is reduced, but the cross-sectional area of the second bypass can be widened, which is desirable when the viscosity of the second fluid is high, for example.

Further, in the above-described embodiment, the first fluid flows in from the inflow pipe 126 and flows out from the outflow pipe 127 to the outside of the heat exchanger 1, but the direction of the flow may be opposite. .. That is, the first fluid may be connected to the heat exchanger 1 in the circulation flow path so that the first fluid is press-fitted from the outflow pipe 127 and flows out from the inflow pipe 126.

Similarly, the direction of flow of the second fluid may be reversed from that of the embodiment described above. That is, the pressure may be applied to the second fluid so that the second fluid flows from the left side to the right side in FIG.

It is desirable that the temperature difference between the first fluid and the second fluid becomes unnecessarily large in a specific part of the heat exchanger 1 because the heat exchanger 1 may be damaged due to the difference in the coefficient of thermal expansion. Absent. In that respect, in the heat exchanger 1, the flow paths of the first fluid and the second fluid are formed by connecting the hollow portions formed between the adjacent plates 111 in series, and these are formed. Since it is possible to reverse the direction of the flow of the first fluid flowing in the flow path and the direction of the flow of the second fluid, the temperatures of those two types of fluids that are in contact with each other via the plate 111. The difference can be reduced over the entire area of the flow path.

For example, if the first fluid is relatively cold and the second fluid is relatively hot, the first fluid that has just flowed in from the inflow pipe 126 has been deprived of heat and cooled. The first fluid that exchanged heat with the second fluid and flowed near the outflow pipe 127 is a hot second fluid that has taken heat away and has not been cooled yet. Heat exchange will be performed between them. Therefore, the temperature difference between the first fluid and the second fluid that are in contact with each other via the plate 111 is averaged, and it is safe because a large temperature difference does not occur locally.

Further, the material of each component of the heat exchanger 1 in the above-described embodiment can be arbitrarily changed. For example, a material other than silicone rubber may be used as the sealing material. Further, as the material of the plate 111, the casing 12, and the fixing tool 113, a material other than stainless steel may be adopted. For example, the heat exchange rate can be increased by using a material having a high thermal conductivity such as copper for the plate 111.

Further, although the fastener 113 is composed of bolts and nuts, any other fixture for anchoring capable of axially fastening the laminated plate assembly 11 may be used. Further, if there is no risk of the plate set 20 being deformed, the fastener 113 may not be provided.

Further, in the above-described embodiment, the contact surfaces (ends) between the back surface of the adjacent right side plate 111 and the front surface of the left side plate 111 are fixed by welding, but the method of fixing them is welding. Any other method of fixing that can seal the fluid may be adopted. For example, the contact surfaces may be fixed to each other by adhesion.

Further, instead of fixing the contact surface between the back surface of the adjacent right side plate 111 and the front surface of the left side plate 111 to form the plate set 20, the O-ring or the like is sealed in the same manner as the sealing between the plate sets 20. The stoppers are placed between the back of the right side plate 111 and the front of the left side plate 111, the encapsulants are sandwiched between the right side plate 111 and the left side plate 111, and the encapsulants are crimped to them. A configuration that seals between may be adopted.

Further, instead of sealing between the adjacent plate sets 20 by crimping the sealing material, a configuration may be adopted in which they are sealed by welding, fixing with an adhesive or the like.

Further, instead of accommodating the laminated plate assembly 11 in the casing 12, for example, a wall surface for forming a first bypass is provided, and an inflow pipe for allowing a second fluid to flow into the laminated plate assembly 11 is provided in the plate 111-1. Outflow to the through hole 1113 and to receive the second fluid outflow from the laminated plate assembly 11.<u style="single">tube</u>May be adopted to connect the plates to the through holes 2113 of the plates 111-6. A perspective view of the left side plate 111 according to such a modification is shown in FIG.

Further, the arrangement of the flow path of the first fluid and the arrangement of the flow path of the second fluid in the above-described embodiment can be changed. For example, the first bypass is arranged at the outer edge of the plate 111 and the second bypass is arranged so as to penetrate the inside of the plate 111, but their arrangement can be changed arbitrarily.

For example, FIG. 8 shows a modification in which the arrangement of such fluid flow paths is changed from the above-described embodiment. In the modified example shown in FIG. 8, one of the casings 12 is not opened, and the casing 12 is installed so that the axis of the tubular body is perpendicular to the wall. In such a case, since the second fluid cannot flow to the left in FIG. 8, a pipe is arranged inside the through hole 1111 and the through hole 2111, and the pipe is used as the flow path of the second fluid.

When the pipe is arranged inside the through hole 1111 and the through hole 2111, the second fluid that should flow through the through hole 1113 and the through hole 2113 while drawing an arc flows through the through hole.<u style="single">1111</u>And since there is no concern of bypassing to the through hole 2111, as shown in FIG. 9, the through hole 1111 and the through hole 1113 and each of the through holes 2111 and 2113 can be connected to form one through hole. As a result, the area of the through hole 1113 and the through hole 2113 can be increased, and the fluid resistance with respect to the second fluid can be reduced.

Further, the first fluid flows in the hollow portion 2116 and the second fluid flows in the hollow portion 1116 in an arc shape, but for example, a spiral flow path or a meandering flow path, etc. Channels of various shapes may be configured in their hollows. Further, the positions and directions of the inflow and outflow of the first fluid and the second fluid in the heat exchanger 1 can be arbitrarily changed.

Further, in the above-described embodiment, as an example, the first fluid has a relatively low temperature and the second fluid has a relatively high temperature, but these may be reversed.

Further, the fluid in the present application is all fluids including liquids and gases.

Since the present invention can be applied to various devices requiring heat exchange and can be mass-produced, it can be used in service industries such as so-called manufacturing and retail industries.

1 ... Heat exchanger, 11 ... Laminated plate assembly, 12 ... Casing, 20 ... Plate set, 111 ... Plate, 112 ... Encapsulant, 113 ... Fastener, 121 ... right pipe, 122 ... left pipe, 123 ... spacer ring, 124 ... spacer ring, 125 ... lock ring, 126 ... inflow pipe, 127 ... outflow pipe