JP2007010202A - Heat exchange unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat exchange unit using two kinds of plates having symmetric relationship on the shape of heat transfer portions, and providing front and rear faces of each plate with flow channels of different shapes to cope with difference in properties of heat exchange fluids, to sufficiently secure heat transferring performance to each fluid and to achieve high heat exchanging efficiency. <P>SOLUTION: This heat exchange unit uses two kinds of heat exchange plates 10, 20 having central recessed and projecting pattern portions 30, 40 opposite in recessed and projecting directions, and two kinds of plates are integrated in a state that the faces of symmetrical shapes of the recessed and projecting pattern portions 30, 40 are overlapped and faced to each other, to provide clearances 61, 62 between the plates with two kinds of shapes and dimensions different between front and rear sides of the plate, thus various heat transferring performances can be exercised as flow channels of different properties in each of the clearances, heat can be efficiently transferred between the plate and each fluid by allowing each flow channel to correspond to the property of each heat exchange fluid, and the heat exchange can be efficiently performed between the heat exchange fluids. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a heat exchange unit in which a plurality of heat exchange plates obtained by molding a metal thin plate are integrated in a parallel state and constitutes a main part of a heat exchanger, and in particular, in each state in an integrated state. The present invention relates to a heat exchange unit that generates flow paths having different shapes between plates and appropriately performs heat transfer corresponding to the difference in properties of each heat exchange fluid to increase heat exchange efficiency.

When using a heat exchanger that transfers heat between a high-temperature fluid and a low-temperature fluid (heat exchange), if you want to increase the heat transfer rate and improve the heat exchange performance, then plate-type heat exchange has been used. Many vessels were used. In this plate heat exchanger, a plurality of substantially plate-like plates are stacked in parallel at a predetermined interval, each plate is used as a flow channel, and each channel is supplied with a high-temperature fluid and a low-temperature fluid every other plate. It is a structure which makes it flow alternately and heat-exchanges through each plate. A typical example of such a conventional plate heat exchanger is described as a conventional technique in Japanese Patent Laid-Open No. 3-91695, and is shown in FIGS. 5 and 6 in the publication. There is something.
In such a conventional plate-type heat exchanger, a gasket made of an elastic material is provided between the plates to keep a constant distance between the plates and to partition as a fluid passage portion.

  On the other hand, as the heat transfer surface shape of such a plate heat exchanger, a herringbone type concave / convex pattern shape has been conventionally used, but it was difficult to reduce pressure loss and ensure pressure resistance strength with this shape. In recent years, various other concavo-convex pattern shapes have been proposed, such as those disclosed in Japanese Patent Application Laid-Open No. 2002-257488.

The plate in this conventional heat exchanger is formed in a square shape in the inner part of the seal part (gasket) so that it has a mountain shape in the thickness direction of the plate and the upper end part is flat, and when viewed from above. A plurality of heat transfer surface elements are provided, and a plurality of these plates are stacked to form one heat exchanger.
JP-A-3-91695 JP 2002-257488 A

  The conventional heat exchanger has a configuration shown in each of the above-mentioned patent documents, and the conventional plate shown in the above-mentioned patent document 2 is stacked while alternately inverting the upper and lower sides when configuring the heat exchanger. The upper end of the heat transfer surface element in the plate (protruding direction tip) and the flow path crossing portion (bottom of the protrusion direction) of the adjacent plate are in contact with each other. By laminating with the directions aligned in the same direction, the shape of each flow path sandwiching the plates is the same.

  In general, the two fluids that exchange heat with a heat exchanger are different substances, and their conditions such as pressure and flow rate during heat exchange are completely different. It is desirable to consider the heat transfer according to each fluid. However, if the flow path shapes on the front and back of the plate are the same, the heat transfer conditions for the plate will be almost the same, and two heat exchange fluids flowing through each flow path Therefore, it is necessary to provide the optimum heat transfer conditions corresponding to differences in temperature and properties of the two heat exchange fluids that exchange heat with the plate in between. The problem was that it was difficult to perform efficient heat exchange.

  The present invention has been made in order to solve the above-described problems, and uses two types of plates in which the heat transfer portion shapes are symmetrical to each other. An object of the present invention is to provide a heat exchange unit that can cope with the difference in properties, sufficiently ensure heat transfer performance for each fluid, and obtain high heat exchange efficiency.

  The heat exchange unit according to the present invention is formed by integrating a plurality of thin metal plate heat exchange plates having a predetermined uneven pattern in a parallel state, and the flow of one heat exchange fluid between the heat exchange plates. The first gap portion and the second gap portion through which the other heat exchange fluid circulates each other, and one heat exchange fluid and another heat exchange fluid are passed through each heat exchange plate. In the heat exchange unit for exchanging heat between, the heat exchanging plate is composed of two types of one plate and the other plate, each of which is formed by substantially matching the edge shape with each other. An uneven pattern portion in which the arrangement relationship with the edge portion is made different between the plates is formed in a substantially central portion of each plate, and each of the uneven pattern portions has a shape of the unevenness on the back side of each unevenness. The A shape in which the uneven pattern portion of the one plate is replaced with each unevenness in the uneven pattern portion of the other plate in the reverse direction with respect to the edge position in the front / back direction The concavo-convex pattern portion of one plate and the concavo-convex pattern portion of another plate are symmetrical to each other, and the heat exchanging plate has the edge in the same direction and the one plate A plurality of the plates and the other plates are alternately arranged to obtain a state in which the edges are opposed to each other at a predetermined interval or are in contact with each other. The tops are brought into contact with each other.

  As described above, according to the present invention, two types of heat exchange plates are used, in which the edge is substantially the same shape, but the central concavo-convex pattern is formed in a symmetrical shape in which the directions of the concavo-convex are reversed. Place two types of plates alternately in parallel with the edges facing in the same direction, and tighten them with gaskets between the edges of each heat exchange plate. When integrated by brazing, the gaps between the plates are changed according to the arrangement state in which the concave and convex pattern part at the center of each plate faces the symmetrical surface of the other plate. By appearing in two different shapes and sizes on the front side and the back side, each gap forms a flow path with a different property, and can exhibit different heat transfer performance. heat If made to correspond to the properties of the changeover fluid plate and is very efficiently allowed to proceed heat transfer between the fluids, efficient heat exchange can be performed between the heat exchange fluids. In addition, in the overlapped state, the convex portions of the adjacent plates and the convex portions corresponding to the back side of the concave portions can be brought into contact with each other. The uneven pattern portion of the heat exchange plate is supported by separate plates on both sides of the front and back, and the strength is greatly improved, and the pressure of the heat exchange fluid introduced between the plates is high. Even if it becomes, it can maintain a gap shape reliably and can perform heat exchange appropriately.

  Further, in the heat exchange unit according to the present invention, each of the heat exchanging plates is formed in a rectangular shape or a rectangular shape as necessary, and at least the uneven pattern portion is in the middle of the horizontal side direction or the vertical side direction. The both sides sandwiching the position are shaped to be symmetrical.

  As described above, according to the present invention, the uneven pattern portion of the heat exchange plate is shaped to be symmetrical about the intermediate position in either side direction, and one heat exchange plate is reversed so that the positions of the front and back sides are reversed. When the relationship is changed, the arrangement of the unevenness remains unchanged with respect to the arrangement before the replacement, and only the relationship of the unevenness is changed, and the shape of the other heat exchange plate and the uneven pattern portion that is not reversed is changed. When the heat exchanging plate is press manufactured, it is possible to form at least the concave / convex pattern portion with the same set of molds, and the same set of complex concave / convex pattern portions on two different plates. It can be handled by molds, and it can reduce costs and greatly improve production efficiency.

  Further, in the heat exchange unit according to the present invention, if necessary, the uneven pattern portion of the heat exchange plate is raised in a substantially truncated cone shape or substantially polygonal truncated cone shape on one surface side of the raised portion. On the surface, each convex portion has a plane and / or curved surface that intersects the conical surfaces facing each other at each intermediate portion between the conical surfaces facing each other at the closest distance of each convex portion. In addition, a large number of intermediate raised portions having a raised shape having one or more apexes having a predetermined height lower than the apex of the convex portions are formed, and the intermediate protuberances are adjacent to each other at the closest distance and are in the middle. A plurality of combinations with other protrusions interposing the intermediate protrusions are arranged at the same time, and the intermediate height between each of the intermediate protrusions and another adjacent intermediate protrusion is the minimum height in the height direction of the protrusion. There is a non-raised part that becomes a position, Raised portion is a component of the recess surrounded around the intermediate ridges and protrusions.

  As described above, according to the present invention, the convex and concave pattern portion of the heat exchange plate is formed with a convex portion that is raised in a substantially truncated cone shape or a substantially polygonal frustum shape, and an intermediate raised portion is disposed between the convex portions. When a plurality of heat exchanging plates are integrated in a parallel state, the gaps between the plates are linearly continuous while repeating expansion and contraction along the direction of arrangement of the convex portions, and flow paths having a substantially reticulated structure intersecting each other. By doing so, almost equal heat transfer performance is obtained by giving substantially the same behavior to the flow of heat exchange fluid regardless of whether the flow relationship of heat exchange fluid is parallel flow, counter flow, or cross flow. Regardless of the direction of the flow of the working fluid, heat transfer can be performed smoothly with low pressure loss, the degree of freedom in designing the heat exchanger can be increased, and the versatility is excellent. In addition, the heat exchange fluid can freely flow in each direction on the plate, and the entire area of the plate can be contributed as an effective heat transfer portion while the heat exchange fluid is distributed to each part of the plate. By providing intermediate ridges between each conical surface, heat transfer can be promoted by changing the flow state from a combination of simple pyramids and cones, resulting in a large increase in heat transfer per unit area. And high performance can be achieved. Furthermore, since the convex part that contacts the other plate has a substantially frustum shape, and the force applied to the convex part can be distributed in the direction of each frustum surface, the strength can be increased compared to other concave and convex shapes, and the heat exchange fluids Corresponding to a large pressure difference, the plate interval can be maintained and the pressure resistance performance can be improved.

  An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a schematic configuration explanatory diagram of one heat exchange plate in the heat exchange unit according to the present embodiment. FIG. 2 is a schematic configuration explanatory diagram of the other heat exchange plate in the heat exchange unit according to the present embodiment. FIG. 3 is an explanatory diagram of the arrangement of the heat exchange plates in the heat exchange unit according to the present embodiment, FIG. 4 is an explanatory diagram of the integrated state of the heat exchange unit according to the present embodiment, and FIG. 5 is the present embodiment. FIG. 6 is an AA, BB, and CC sectional view of FIG. 5, and FIG. 7 is a heat exchange unit according to the present embodiment. FIG. 8 is a cross-sectional view of DD, EE, and FF in FIG. 7, and FIG. 9 is for heat exchange in the heat exchange unit according to the present embodiment. It is a principal part expanded sectional view in a plate uneven | corrugated pattern part position.

  In each of the drawings, the heat exchanging unit 1 according to the present embodiment includes a predetermined pattern including concave and convex pattern portions 30 and 40 that are in contact with the heat exchanging fluid on the front and back sides and an edge portion 50 that is disposed around the concave and convex pattern portions 30 and 40. Two types of heat exchange plates 10 and 20 formed into a shape are provided, and a plurality of these plates are integrated with gasket 60 in a parallel state.

  The heat exchange plates 10 and 20 are made of a substantially rectangular thin metal plate, and are formed with concave and convex pattern portions 30 and 40 serving as heat transfer portions in a substantially central portion through a predetermined pressing process. In this configuration, the edge portion 50 is molded on the outer periphery surrounding 30 and 40. The concavo-convex pattern portion 30 in one heat exchange plate 10 and the concavo-convex pattern portion 40 in the other heat exchange plate 20 have symmetrical shapes in which the front / back concavo-convex relationship of each portion is just opposite, and these heat exchange plates The plates 10 and 20 are two types of plates in which the concave and convex directions of the central concave and convex pattern portions 30 and 40 are opposite to the peripheral edge 50 having the same shape.

  Further, in the heat exchange plate 10, like the known plates, opening holes 11, 12, 13, and 14 are formed in the inner portions of the four corners 50, respectively, and are used as portions through which the heat exchange fluid passes. . Similarly, openings 21, 22, 23, and 24 are formed in the heat exchange plate 20.

  The concavo-convex pattern portions 30 and 40 are configured such that the basic shape of the concavo-convex pattern is the same. The concavo-convex pattern portion 30 protrudes in a substantially quadrangular frustum shape on one surface side, and each conical surface is arranged to face the conical surface of another adjacent substantially quadrangular frustum-shaped portion and has each conical surface. A plurality of convex portions 31 molded in a matrix arrangement having the same arrangement pitch in four directions, and each intermediate portion between the conical surfaces facing each other of the adjacent convex portions 31 are intersecting portions of the respective ridge lines of the opposing two conical surfaces. With the lowest height position, and the intermediate position between the intersecting portions as a top, an intermediate ridge 33 formed by raising it to a predetermined height lower than the top 32 of the convex portion 31, and this intermediate ridge 33 Present as a non-protruding portion in the intermediate portion of each adjacent convex portion 31 without being interposed, and the periphery is surrounded by the conical surface of the convex portion 31 and the slope of the intermediate protruding portion 33, and the lowest height position in the plate normal direction It is the structure provided with the recessed part 34 used.

  On the other hand, the concavo-convex pattern portion 40 has a symmetrical shape with the concavo-convex pattern portion 30 on the basis of the edge portion 50 common to the heat exchange plates 10, 20, and is a substantially quadrangular pyramid-shaped recessed portion. A plurality of concave portions 41 formed in a matrix arrangement, and an intermediate valley portion 42 formed as a shape in which each intermediate portion between opposing conical surfaces of the adjacent concave portions 41 is recessed to a predetermined depth shallower than the bottom portion of the concave portion 41; The intermediate portion of each of the adjacent concave portions 41 without the intermediate valley portion 42 is provided with a convex portion 43 that is the highest position in the plate normal direction. The concave portion 41 of the concave / convex pattern portion 40 coincides with the concave shape on the back side of the convex portion 31 of the concave / convex pattern portion 30, the intermediate valley portion 42 is the concave shape on the back side of the intermediate raised portion 33, and the convex portion 43 is the concave portion 34. It is the structure corresponding to each back side convex shape.

  The convex portion 31 and the concave portion 34, and the concave portion 41 and the convex portion 43 are in a relationship of being shifted from each other by a half pitch in the arrangement direction, and the convex portions 31, 43 and the concave portions 34, 41 are arranged in a matrix at the same pitch. It is in the state arranged as. However, in the concave and convex pattern portions 30 and 40, the concave portions and the concave portions 34 and 41 on the back side of the convex portions 31 and 43, and the convex portions on the back side of the concave portions 34 and 41 and the shapes of the convex portions 31 and 43 are respectively large. The uneven pattern is asymmetrical between the front side and the back side of one plate.

  Furthermore, among the arrangement of the convex portions 31 in the concave / convex pattern portion 30, the concave portion 41 among the arrangement direction in which the concave portion 34 is interposed between the convex portions 31 and the arrangement of the concave portions 41 in the concave / convex pattern portion 40. The arrangement direction in which the convex portions 43 are interposed is parallel or perpendicular to each side of the rectangular plate. In addition, the concavo-convex pattern portions 30 and 40 may be configured to have a concavo-convex pattern shape in which the arrangement direction has an inclination of 45 ° or an arbitrary angle with respect to each side of the plate.

  The edge portion 50 is configured to be molded as the same flat shape portion along each side of each of the heat exchange plates 10 and 20, and when the plates are overlapped, a plurality of the front and back directions are all in the same direction. In this manner, the gaskets 60 are opposed to each other at a predetermined interval, and the gasket 60 is sandwiched between the edge portions 50. With reference to the edge 50 having the same shape, in the heat exchange plate 10, the protruding side of the convex portion 31 is the surface, and in the heat exchange plate 20, the protruding side of the convex portion 43 is the surface. .

  In a state where the heat exchange plates 10 and 20 are overlapped with the same front and back positional relationship and integrated as the heat exchange unit 1, in addition to the edge portion 50, the convex portion in the concavo-convex pattern portion 30 of the heat exchange plate 10. 31 is in contact with the convex portion on the back side of the concave portion 41 in the concave and convex pattern portion 40 of the heat exchange plate 20, and the convex portion on the back side of the concave portion 34 in the concave and convex pattern portion 30 of the heat exchange plate 10; The convex part 43 in the uneven | corrugated pattern part 40 of the plate 20 for heat exchange different from the above is contact | abutting, and the clearance gap which can distribute | circulate the fluid for heat exchange will arise between each plate other than a contact location.

  In the first gap portion 61 that is the gap on the raised side of the convex portion 31 in the concavo-convex pattern portion 30, the back side portions of the intermediate raised portion 33 and the intermediate valley portion 42 that are lower than the raised portion 31, and the lower recessed portion 34. And the rear portion of the convex portion 43 are opposed to each other at a predetermined interval, and the gaps formed on the surface side of the intermediate raised portion 33 and the surface side of the concave portion 34 communicate with each other to form a linear flow path. There is no. These channels have a channel cross-sectional area that is larger in the vicinity of the recess 34 than in the vicinity of the intermediate raised portion 33, and each channel continues linearly while repeatedly expanding and contracting, and intersects and communicates with each other. The first gap 61 communicates with the first gap 61 and the outside through the opening holes 11, 13, 21, and 23 at the two corners on the same side of the heat exchange plates 10 and 20, respectively. It becomes.

  On the other hand, in the second gap portion 62 that is a gap on the raised side of the convex portion 43 of the concavo-convex pattern portion 40, the tunnel-like gap portion between the intermediate valley portion 42 and the back side portion of the intermediate raised portion 33 is convex with the concave portion 41. It is in the state which connects the space which arises between the part 31 back side parts, and a linear flow path is formed. These channels have a channel cross-sectional area that is larger in the vicinity of the recess 41 than in the vicinity of the intermediate valley portion 42, and each channel continues linearly in the direction in which the recess 41 is arranged while repeating expansion and contraction, and Crossing and communicating. The second gap portion 62 communicates with the second gap portions 62 and the outside through the opening holes 12, 14, 22, 24 at corners different from the opening holes 11, 13, 21, 23, respectively. It will be.

  The shapes and sizes of the first gap portion 61 and the second gap portion 62 are such that the unevenness of one plate is asymmetrical on the front and back, and the surfaces that make symmetry of each plate in the integrated state of the plates face each other. Therefore, they are different from each other. The first gap portion 61 and the second gap portion 62 have different heat transfer characteristics based on the difference in shape and size, but consider the properties of the two fluids that cause heat exchange in advance. Thus, the shape and size of each gap are set by adjusting the plate unevenness so that the flow and heat transfer characteristics can be matched. And the structure of the whole heat exchanger is also set so that the fluid for the heat exchange which has the property suitable for the characteristic may be introduce | transduced into these 1st clearance gap parts 61 and 2nd clearance gap parts 62, respectively.

  Further, as another feature of the heat exchange plates 10 and 20, the short side direction center position is sandwiched between each opening hole portion inside the edge portion 50 and the region of the concave and convex pattern portions 30 and 40. The two side portions are just symmetrical. As a result, when one of the heat exchanging plates 10 is inverted by 180 ° while maintaining the positional relationship in the long side direction and the positional relationship between the front and back sides is changed, the positions of the irregularities and the opening holes remain unchanged with respect to the arrangement before the replacement. Thus, the arrangement is such that only the relationship between the concaves and convexes is switched, and the inverted plate 10 and the other non-inverted plate 20 have the same shape of the region inside the edge portion 50. .

  Thus, if the predetermined range including the concavo-convex pattern portions 30 and 40 is set so that when one of the front and back surfaces is inverted, the shape is exactly the same as the other, two types of heat exchange plates 10 and 20 can be manufactured by the same method, and in this case, a press device that can adjust the position of the portion corresponding to the edge 50 in the mold of the press device with respect to other portions, for example, the present inventors' Auxiliary die that can be manufactured using the invented press device described in Japanese Patent Application Laid-Open No. 2003-275824 and corresponds to the edge portion 50 with respect to the central main mold portion that causes the uneven pattern portions 30 and 40 in the die. What is necessary is just to press by adjusting the position of a part to a press direction. In this case, two different plates can be manufactured with the same mold, and the production efficiency is extremely high.

  Next, assembly of the heat exchange unit according to the present embodiment will be described. A plurality of two types of heat exchanging plates 10 and 20 each having the same shape of the edge portion 50 and the concavo-convex pattern portions 30 and 40 in the central portion being symmetrical to each other are obtained in advance by press molding of a metal thin plate. And

  The heat exchange plates 10, 20 are arranged so that the symmetrical surfaces of the concavo-convex pattern portions 30, 40 face each other with the same front and back directions with respect to the edge 50 of the heat exchange plates 10, 20. In the same manner as in the case of a conventionally known plate heat exchanger, the heat exchange plate 10 while sandwiching the gasket 60 between the edge portions 50 of each plate or around a predetermined opening hole, A heat exchange unit 1 is obtained in which 20 are overlapped and fixed in a tightened state from both sides in the overlapping direction in a state where a predetermined number of layers are overlapped, and all the plates are integrated in a watertight state.

  In the obtained heat exchange unit 1, the first gap portion 61 is formed on the side where the convex portion 31 of each heat exchange plate 10 is present, and the opening holes 11, 13, 21, and 23 are formed in the first gap portion 61. Communicate. Moreover, the 2nd clearance gap part 62 is also produced as a clearance gap between the 1st clearance gap 61 and the heat exchange plates 10 and 20, and the opening holes 12, 14, 22, and 24 are connected to this. In the state integrated as the heat exchange unit 1, usually, each side of the plate is supported by being aligned in the horizontal or vertical direction, so that the main flow path portions in the gap portions 61 and 62 between the plates, That is, the gap portions that continue along the concave portions 34 and the intermediate raised portions 33 of the heat exchange plate 10 and the gap portions that continue along the concave portions 41 and the intermediate valley portions 42 of the heat exchange plate 20 are slanted, respectively. Will be inclined to.

  Then, the use condition in the heat exchanger of the heat exchange unit which concerns on this Embodiment is demonstrated. One heat exchange fluid flows into and out of the first gap 61 through the two opening holes 11, 13, 21, and 23 of each heat exchange plate 10, 20 constituting the heat exchange unit 1, while another two The other heat exchange fluid is circulated through the second gap 62 through the two opening holes 12, 14, 22, 24.

  In the gaps 61 and 62 through which the heat exchange fluid flows, the recesses and the vicinity of the intermediate raised portion 33 or the intermediate valley portion 42 are directed toward the oblique directions in which the convex portions 31 and 43 and the concave portions 34 and 41 are arranged. The main fluid flow path is continuous in a straight line, and the heat exchange fluid flows through this. The heat exchange fluid naturally joins and branches while proceeding diagonally through the gaps 61 and 62, and smoothly flows to the front and back surfaces of the uneven pattern portions 30 and 40 of the heat exchange plates 10 and 20, Even if the flow relationship between the two heat exchange fluids flowing through the gaps 61 and 62 is parallel flow, countercurrent flow, or cross flow flow, heat exchange is performed on the flow due to the unique uneven pattern shape on the plate. Substantially the same conditions are given to the working fluid, and even if the two fluids are in any combination, the pressure loss in the flow path can be suppressed and the gaps 61 and 62 can be circulated smoothly.

  In this way, the heat exchange fluid widely spreads across the gaps 61 and 62 between the plates, thereby promoting heat transfer between the plates and the fluids, and the gaps 61 and 62 between the plates are enlarged. By forming channels with different shapes that have a unique shape that continues to be reduced and that has heat transfer characteristics that take into consideration the properties of each heat exchange fluid on both sides of the plate. Heat transfer efficiently proceeds between each passing heat exchange fluid and each heat exchange plate 10, 20, and a loss occurs between the two heat exchange fluids via each heat exchange plate 10, 20. Heat exchange can be performed smoothly.

  As described above, in the heat exchange unit according to the present embodiment, the edge 50 has the same shape, but the central uneven pattern portions 30 and 40 are formed in a symmetrical shape in which the directions of the unevenness are opposite to each other. Two types of heat exchange plates 10 and 20 are used, and these two types of plates are alternately overlapped so that the edge 50 is in the same direction to form a plurality of parallel plates, and the edges of each of the heat exchange plates 10 and 20 When the gasket 60 is interposed between 50 and tightened, the concave and convex pattern portions 30 and 40 at the center of each plate are arranged in a space between the plates according to the arrangement state in which the surfaces having symmetrical shapes face each other. Since 61 and 62 appear in two different shapes and sizes on the front side and the back side of the plate, the gaps 61 and 62 form flow paths having different properties. If each flow path can correspond to the properties of each heat exchange fluid, heat transfer between the plate and each fluid can be carried out very efficiently, so that the heat transfer performance can be improved. Efficient heat exchange.

  In the heat exchanging unit according to the above embodiment, the concave / convex pattern portion 30 is a position in which the convex portions 31 are arranged with the intermediate raised portions 33 interposed in four directions with respect to one convex portion 31 and are shifted by a half pitch. However, the present invention is not limited to this, and the shapes of the concave and convex pattern portions 30 and 40 in the heat exchange plates 10 and 20 are symmetrical to each other. Except for the point set to be related, it can be an arbitrary configuration, the shape of the convex part in the concave and convex pattern part, the presence or absence of the intermediate raised part, and the other convex part adjacent to one convex part The pattern shape can be changed by adjusting the number of arrangements, etc., and it can be adjusted to appropriately correspond to the characteristics of the heat exchange fluid introduced into the gap between the plates. It made.

  Further, in the heat exchange unit according to the embodiment, the shape of the convex portion 31 in the concavo-convex pattern portion 30 is a quadrangular pyramid, but in addition to this, the convex portion may be other various shapes such as a pentagonal pyramid and a hexagonal pyramid. It may be formed in a truncated pyramid shape or a truncated cone shape, and may be appropriately set according to the characteristics to be obtained as a heat exchanger.

  Further, in the heat exchange unit according to the above-described embodiment, for the type in which the heat exchanging plates 10 and 20 are overlapped and integrated via the gasket 60, the concave and convex pattern portions 30 and 40 have a predetermined symmetrical shape. Although it is configured to use various types of plates, the present invention is not limited to this, and even when adjacent plates are connected in a watertight state by brazing and integrated in parallel, the edges are common but uneven as described above. The pattern portion can be formed using two types of plates having a predetermined symmetrical shape, and a heat exchange unit that can withstand higher pressure while having the same heat exchange characteristics as described above can be obtained.

It is a schematic block diagram of one heat exchange plate in the heat exchange unit which concerns on one embodiment of this invention. It is a schematic block diagram of the other plate for heat exchange in the heat exchange unit which concerns on one embodiment of this invention. It is arrangement | sequence state explanatory drawing of the plate for heat exchange in the heat exchange unit which concerns on one embodiment of this invention. It is an integrated state explanatory view of the heat exchange unit concerning one embodiment of the present invention. It is a principal part enlarged view of the plate for one heat exchange in the heat exchange unit which concerns on one embodiment of this invention. It is AA, BB, and CC sectional drawing of FIG. It is a principal part enlarged view of the other plate for heat exchange in the heat exchange unit which concerns on one embodiment of this invention. It is DD, EE, and FF sectional drawing of FIG. It is a principal part expanded sectional view in the plate uneven | corrugated pattern part position for heat exchange in the heat exchange unit which concerns on one embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat exchange unit 10, 20 Heat exchange plate 11, 12, 13, 14 Open hole 21, 22, 23, 24 Open hole 30, 40 Uneven pattern part 31 Convex part 32 Top part 33 Middle protuberance part 34 Concave part 41 Concave part 42 Middle Valley part 43 Convex part 50 Edge part 60 Gasket 61 First gap part 62 Second gap part

Claims (3)

A plurality of heat exchange plates made of a thin metal plate having a predetermined uneven pattern are integrally formed in a parallel state, and the first gap portion through which one heat exchange fluid flows between each of the heat exchange plates and the other heat Heat is generated to cause heat exchange between one heat exchange fluid and the other heat exchange fluid via each heat exchange plate. In the exchange unit,
The heat exchange plate is composed of two types, one plate and another plate, which are formed so that the edge shapes are substantially coincided with each other, and the arrangement relationship between the two types of plates and the edge is mutually Different uneven pattern portions are formed in the substantially central part of the plate,
Each of the concavo-convex pattern portions has an uneven concavo-convex shape in which each concavo-convex pattern forming the concavo-convex pattern is different from the concavo-convex shape on the back side, while the concavo-convex pattern portion of the one plate is the concavo-convex pattern of the other plate. Each unevenness in the pattern part is formed as a shape that is reversed in the front and back directions with respect to the edge position, and the uneven pattern part of one plate and the uneven pattern part of the other plate are symmetrical with each other Being
A plurality of the heat exchange plates are overlapped so that the edges are in the same direction and the one plate and the other plate are alternately arranged, and the edges are opposed to each other at a predetermined interval or respectively. A heat exchanging unit characterized by obtaining a contacted state, and abutting the tops of convex portions facing each other of the concave and convex pattern portions. In the heat exchange unit according to claim 1,
Each of the heat exchange plates is rectangular or rectangular,
At least the uneven pattern portion has a shape in which both side portions sandwiching each intermediate position in the horizontal side direction or the vertical side direction have a symmetrical relationship. In the heat exchange unit according to claim 1 or 2,
The concavo-convex pattern portion of the heat exchange plate is formed as a state in which the convex portion is raised in a substantially truncated cone shape or a substantially polygonal frustum shape on one surface side, and at the closest distance of each convex portion. Each intermediate portion between adjacent conical surfaces of adjacent ones has a flat surface and / or a curved surface on the surface that intersect with the conical surfaces facing each other of the convex portion, and a top portion having a predetermined height lower than the top portion of the convex portion. Or a number of intermediate ridges that have a plurality of ridge shapes,
Each of the convex portions is adjacent to each other at the closest distance, and a combination with other convex portions interposing the intermediate raised portion in the middle is in an arrangement state in which a plurality of combinations are obtained at the same time.
There is a non-bumped portion which is the lowest height position in the height direction of the ridge in the middle between each of the intermediate ridges and the other adjacent intermediate ridges. A heat exchange unit characterized by being surrounded and forming the recess.

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