KR20070001819A - Heat exchange unit - Google Patents

Abstract

A heat exchange unit is provided to form different paths between plates combined together, thereby realizing heat transfer corresponding to difference of characteristics between heat exchange media. A heat exchange unit includes first and second heat exchange plates(10,20) formed with metal thin plates with predetermined irregular pattern parts(30,40), wherein the plates are combined in parallel to each other and integrated together, and provided with first and second clearance parts(61,62) for passing first and second heat exchange media respectively. The first and second plates are substantially equal at outer peripheral areas thereof but different in the irregular pattern parts in the centers, wherein the pattern parts are complementary with each other to be symmetrically. The first and second plates are alternately overlapped with each other, wherein the outer peripheral areas face in the same direction with a predetermined distance from each other, and protrusions in the pattern parts contact each other.

Description

Heat exchange unit {HEAT EXCHANGE UNIT}

1 is a plan view showing a schematic configuration of a first plate of a heat exchange unit according to an embodiment of the present invention.

2 is a plan view showing a schematic configuration of a second plate of a heat exchange unit according to an embodiment of the present invention.

3 is a perspective view showing an arrangement of heat exchange plates for heat exchange units according to an embodiment of the present invention.

4 is a side view illustrating a state in which a heat exchange plate is assembled to a heat exchange unit according to an embodiment of the present invention.

5 is a partially enlarged view of the first plate of the heat exchange unit according to the embodiment of the present invention.

FIG. 6 is a cross-sectional view taken along the line VI-VI of FIG. 5.

FIG. 7 is a cross-sectional view taken along the line VIII-VIII of FIG. 5.

FIG. 8 is a cross-sectional view taken along the line VIII-VIII in FIG. 5.

9 is a partially enlarged view of a second plate of the heat exchange unit according to the embodiment of the present invention.

FIG. 10 is a cross-sectional view taken along the line VIII-VIII in FIG. 9.

FIG. 11 is a cross-sectional view taken along the line VI-XI of FIG. 9.

FIG. 12 is a cross-sectional view taken along the line XII-XII of FIG. 9.

13 is a partially enlarged cross-sectional view showing an irregular pattern portion of a heat exchange plate for a heat exchange unit according to an embodiment of the present invention.

The present invention relates to a heat exchange unit comprising a plurality of heat exchange plates formed of a thin metal plate and combined in parallel to each other, specifically, a flow path having a different configuration formed between each plate in a state where the plates are combined The present invention relates to a heat exchange unit capable of appropriate heat transfer in response to a difference in characteristics of each heat exchange fluid, thereby increasing heat exchange efficiency.

In the use of heat exchangers in which heat transfer (heat exchange) is performed between a high temperature fluid and a low temperature fluid, a plate type heat exchanger has been widely used in the past when the heat transfer rate is increased to increase heat exchange performance. The plate heat exchanger has a structure in which a plurality of plate heat transfer plates are overlapped at a predetermined interval in parallel so that a flow path is formed between each plate. The above-described flow path alternately flows the hot fluid and the cold fluid to exchange heat through each heat transfer plate. Such a plate heat exchanger is described in the prior art with reference to FIGS. 5 and 6 in Japanese Patent Laid-Open No. 3-91695.

In such a conventional plate heat exchanger, a gasket member formed of an elastic material is disposed between two adjacent plates to keep a constant therebetween to partition a passage of a fluid.

Conventionally, a herringbone type irregular pattern shape has been used for the heat transfer plate of such a plate heat exchanger. However, in this shape, it is difficult to attain both pressure loss reduction and pressure resistance strength. Various proposals are made, for example, and it is disclosed by Unexamined-Japanese-Patent No. 2002-257488.

The plate in the above-mentioned conventional heat exchanger is comprised by the inside part of the sealing member (gasket member) including the heat transfer part in which the upper end part was flat in the shape of a mound in the thickness direction (namely, the cross section) of a plate, These plates are stacked on each other to form one heat exchanger.

The conventional heat exchanger has the structure described in the above-mentioned prior art document. The conventional plates described in Japanese Unexamined Patent Application Publication No. 2000-257488 are stacked while alternately inverting the upper and lower sides in the construction of a heat exchanger, and intersecting the flow path between the upper end (protrusion direction end) of the heat transfer part in the plate and the plate adjacent thereto. The part (protrusion direction bottom part) is made to contact. Since these plates are laminated so that the heat transfer portions protrude in the same direction, each flow path formed between two adjacent plates will have the same pattern.

In general, the two kinds of fluids used in the heat exchanger are materials having different chemical compositions, so that their characteristics are not only different but also the conditions of use such as pressure and flow rate during heat exchange are completely different. Therefore, in heat exchange, it is preferable to consider heat transfer according to each fluid. However, when the patterns of the flow paths formed on both sides of the plate are the same, the heat transfer conditions for the plate are substantially the same. Therefore, it is necessary to heat exchange with two heat exchange fluids flowing through each flow path under the same heat transfer conditions. Therefore, there is a problem that it is difficult to provide an optimum heat transfer condition corresponding to a difference in the characteristics, etc., of the two heat exchange fluids which perform heat exchange on both plates, and it is difficult to perform efficient heat exchange.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is possible to cope with the difference in the characteristics of each fluid flowing between the plates by using two kinds of plates in which the shapes of the heat transfer parts are symmetrical to each other and varying the shape of the flow paths on both sides of each plate. It is an object of the present invention to provide a heat exchange unit that sufficiently secures heat transfer performance for each fluid and obtains high heat exchange efficiency.

In order to achieve the above object, the heat exchange unit according to the first aspect of the present invention comprises a plurality of heat exchange plates having a predetermined irregular pattern and made of metal sheets and combined in parallel and integrated with each other, each heat exchange plate Between the first gap portion through which the first heat exchange fluid passes and the second gap portion through which the second heat exchange fluid passes, the heat exchange plate includes a first plate and a second plate, and the first and second plates. The second plate has substantially the same shape as its outer circumferential region, but the irregular pattern portions at the center thereof are different from each other, and the irregular pattern portions of each of the first and second plates have an uneven pattern on one side thereof and correspond to the other side thereof. This different and asymmetrical uneven pattern has a concave-convex pattern of the first plate is the concave-convex pattern opposite to the uneven pattern of the second plate Having a system and symmetrical with each other, the first and second plates are alternately superimposed so that the outer circumferential regions of the first and second plates face the same direction and are spaced apart from each other by a predetermined distance and have irregularities in the first plate. The projection of the pattern portion is in contact with the projection of the irregular pattern portion of the second plate.

According to the first aspect of the present invention, first and second kinds of plates, i.e., each having a central irregular pattern portion symmetrical to each other so that the protruding patterns are opposite to each other with substantially the same shape of the two kinds of plates, that is, the outer circumferential region, are provided with respect to the heat exchange plate. The second plate is used. These two types of plates, i.e., the first and second plates, are assembled by alternately overlapping the outer circumferential regions so as to be in the same direction, and are tightened or formed between the plates by interposing a gasket member between the respective heat exchange plate outer circumferential regions. Solder is soldered in adjacent contact areas that provide two types of gaps, the gaps differing in shape and size on both sides of the plate according to two adjacently combined plates having irregular pattern portions in the center. Two adjacent gaps provide flow paths having different characteristics from each other, resulting in different heat transfer performance. The formation of the flow path according to the characteristics of the heat exchange fluid effectively conducts heat transfer between the plate and the heat exchange fluid, thereby efficiently performing heat exchange between the fluids. In the combined state of the plates in which the projections of the adjacent plates contact each other, the projections formed on the opposite side of the recess contact each other. The plates may be brought into contact with each other not only in the outer circumferential region but also in a plurality of connecting regions of the irregular pattern portion of the plate. The irregular pattern portion of the heat exchanger plate is held by two different adjacent plates to significantly improve the strength of the unit, so that even if a heat exchange fluid is introduced into the gap between the high pressure plates, proper heat exchange is performed by maintaining the proper shape of the gap. .

In a second aspect of the heat exchange unit of the present invention, each of the first and second plates is rectangular or square, and at least the irregular pattern portion of each of the first and second plates is on both sides of the pair of plates or on both sides of the other pair of plates. It has a symmetrical shape with respect to the central position between the sides.

According to the second aspect of the present invention, the irregular pattern portion of each of the first and second plates has a symmetrical shape with respect to the central position between both sides of the pair of plates or both sides of the other pair of plates. When the inside of the plate is inverted to the outside, the uneven pattern is reversed with respect to the uninverted plate, and the shape of the irregular pattern portion is the same as other plates which are not inverted. Therefore, in the production of the heat exchange plate, it is possible to use the same press forming die for at least the irregular pattern portion by the press forming method. As a result, the same die can be applied to an irregular pattern portion having a complicated shape in the manufacture of two different plates, thereby reducing the cost and significantly improving the productivity.

In the third aspect of the heat exchange unit of the present invention, an irregular pattern portion of each of the heat exchange plates is formed between a projection projecting outward from the surface of the heat exchange plate in the form of a truncated cone or a polygonal truncated cone, and between two projections adjacent at the shortest distance. With a plurality of intermediate protrusions disposed, each intermediate protrusion is formed by one or more flat portions or bends extending to opposite surfaces of the two protrusions, each intermediate protrusion one or more top portions placed at a lower position than the top of the protrusion. And a plurality of combinations of protrusions and other protrusions interposed at the shortest distance and interposing intermediate protrusions are simultaneously provided, and a plurality of non-projections are positioned between adjacent protrusions, and each non-projection is a protrusion of the protrusion. The non-projection is enclosed by projections and intermediate projections It provides a recess.

According to the third aspect of the present invention, the irregular pattern of each heat exchange plate has a convex or polygonal pyramid shape, a protrusion protruding outward from the surface of the heat exchange plate, and a plurality of protrusions each disposed between two adjacent protrusions at the shortest distance. Has intermediate projections. When the heat exchange plates are arranged in parallel with each other, a linear flow path of a reticulation shape extending in the above-described directions so that a gap in which similar irregular patterns are repeated along the alignment direction of the projections is provided between two adjacent plates, so that they cross each other. Is provided. More specifically,

Each linear flow path extending in a network includes an expansion area and a reduction area alternately arranged in the same direction, while the linear flow paths extending in a direction perpendicular to the above-described direction are similarly arranged in the same orthogonal direction. And a reduced area. Thus, using the plate assembled in this way, it is possible to impart substantially the same behavior to the heat exchange fluid regardless of the flow system of the heat exchange fluid, ie in any of the parallel flow system, the counter flow system, and the cross flow system. . As a result, no matter how the heat exchange fluid is combined in any direction in the flow direction, it is possible to smoothly heat transfer with low pressure loss so that effective heat exchange can be achieved, resulting in high design freedom and excellent versatility of the heat exchanger. In addition, the heat exchange fluid can freely flow along the plate in the two directions described above, and constant heat transfer characteristics can be obtained regardless of the flow direction of the heat exchange fluid. Therefore, the heat exchange fluid can be spread evenly over the entire area of the plate, so that the whole area can serve as an effective heat transfer part, and the heat transfer can be improved by changing the flow conditions through the intermediate projections as compared to a simple combination of cones or square cones. In other words, the amount of heat transfer per unit area is considerably increased to achieve high performance. In addition, a protrusion in contact with the other plate is provided in the form of a truncated cone or a polygonal pyramid to distribute the force applied to the projection in the direction of the surface of the truncated cone or the polygonal pyramid. As a result, the strength of the assembled plate can be significantly improved compared to the conventional heat exchange plate, and therefore it is possible to keep the distance between two adjacent plates constant even when the pressure difference between the heat exchange fluids is large. It can improve performance.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 13. 1 is a plan view showing a schematic configuration of a first plate of a heat exchange unit according to an embodiment of the present invention, Figure 2 is a plan view showing a schematic configuration of a second plate of a heat exchange unit according to an embodiment of the present invention, 3 is a perspective view illustrating an arrangement of a heat exchange plate for a heat exchange unit according to an embodiment of the present invention, FIG. 4 is a side view illustrating a state in which a heat exchange plate is assembled to a heat exchange unit according to an embodiment of the present invention, and FIG. 5. Is a partially enlarged view of the first plate of the heat exchange unit according to the embodiment of the present invention, FIG. 6 is a sectional view taken along the line VI-VI of FIG. 5, and FIG. 7 is a sectional view taken along the line VII-VII of FIG. 5. 8 is a cross-sectional view taken along the line VII-VII of FIG. 5, FIG. 9 is a partial enlarged view of the second plate of the heat exchange unit according to the embodiment of the present invention, and FIG. 10 is the line VII-VII of FIG. 9. Follow 11 is a cross-sectional view taken along the line XII-XI of FIG. 9, FIG. 12 is a cross-sectional view taken along the line XII-XII of FIG. 9, and FIG. 13 is a heat exchange unit for a heat exchange unit according to an embodiment of the present invention. It is a partially enlarged sectional view which shows the irregular pattern part of a plate.

The heat exchange unit 1 according to the embodiment of the present invention comprises two types of heat exchange plates 10 and 20 that serve as first and second plates, respectively, and are arranged in parallel with each other through the gasket member 60. Is done. The heat exchange plates 10, 20 have irregular pattern portions 30, 40 and outer circumferential regions 50 surrounding the irregular pattern portions 30, 40, respectively. Each plate 10, 20 has both surfaces in contact with the heat exchange fluid.

The heat exchange plates 10 and 20 formed of rectangular metal thin plates have irregular pattern portions 30 and 40 and outer peripheral regions 50 respectively surrounding the irregular pattern portions 30 and 40 in the center portion by a press molding process. Is formed. Irregular pattern portions 30 of the first heat exchange plate 10 have opposite concavities and convex relations with the irregular pattern portions 40 of the second heat exchange plate 20 and are symmetric with each other. As a result, the heat exchange plates 10 and 20 are provided in the form of two different plates having the same shape of the outer circumferential region 50, but the shapes of the center irregular pattern portions 30 and 40 are different from each other so that the unevenness relationship is mutually different. The opposite is true.

 The first heat exchange plate 10 has openings 11, 12, 13, 14 formed at four corners of the plate inside the outer circumferential region 50 in the same manner as in the conventional plate, so that the heat exchange fluid is It may pass through the opening. The second heat exchange plate 20 also has openings 21, 22, 23, 24 in the same manner.

The common basic shape of the irregular pattern portions 30 and 40 described above is an uneven pattern. The above-mentioned irregular pattern portion 30 includes a plurality of protrusions 31, a plurality of intermediate protrusions 33, and a plurality of recesses 34. The projection 31 is formed based on the matrix arrangement and protrudes from the surface of the plate in the form of a polygonal pyramid so that the four pyramidal faces of the protrusion face each peripheral pyramidal face of the adjacent protrusion and correspond to the four pyramidal faces of the protrusion. Are arranged at regular intervals in four directions. Each intermediate protrusion 33 is located in the form of a ridge between the facing pyramids of two adjacent protrusions 31 such that a pair of foot portions of the intermediate protrusions intersect corresponding ridges of the facing pyramid faces. And the apex of the middle projection is located between the intersections of the ridges. The apex of the intermediate protrusion 33 is located at a lower position than the top 32 of the protrusion 31. Each recess 34 is provided in the form of a non-projection at a central position between the protrusions located adjacent to each other without intermediate protrusions 33 being placed therebetween. The recess 34 is surrounded by the pyramidal surface of the projection 31 and the surface of the intermediate projection 33 is inclined so as to be at the lowest position in the direction perpendicular to the plane of the plate.

The irregular pattern portion 40 is symmetrical with the irregular pattern portion 30 when assuming that the outer circumferential regions of the heat exchange plates 10 and 20 face in the same direction, the plurality of recesses 41 and the plurality of intermediate valley portions (42), and a plurality of protrusions (43). The recess 41 is formed based on the matrix arrangement to be recessed in the shape of a polygonal pyramid. Each intermediate valley 42 is located in the form of a depression between the facing pyramids of two adjacent recesses 41 such that the bottom of the intermediate valley 42 is higher than the bottom of the recess 41. To be located at Each projection 43 is provided at the highest position in a direction perpendicular to the plane of the plate between the recesses 41 which are placed adjacent to each other without intermediate valleys 42 positioned therebetween. The recessed portion 41 of the irregular pattern portion 40 is paired with the shape immediately behind the protrusion 31 of the irregular pattern portion 30. The intermediate valley portion 42 is paired with the shape of the rear of the intermediate projections. The protrusion 43 is mated with the rear shape of the recess 34.

The projections 31 and the recesses 34 are positioned to deviate from each other by half the distance in the alignment direction between two adjacent projections. The recesses 41 and the projections 43 are also positioned so as to deviate from each other by two distances in the alignment direction between two adjacent projections. The projections 31 and 43 and the recesses 34 and 41 are formed at regular intervals based on the matrix arrangement. However, in the above-described irregular pattern portions 30 and 40, the recesses formed at the rear of the projections 31 and 42 are different from the shapes of the recesses 34 and 41, and the recesses 34 and 41 are located at the rear of the recesses 34 and 41. The protrusions formed are different from the shapes of the protrusions 31 and 43. Both sides of each plate having an irregular pattern portion are asymmetric with each other.

In addition, two adjacent recesses 41 of the irregular pattern portion 40, as well as a direction in which two adjacent protrusions of the irregular pattern portion 30 are aligned to position the recess 34 therebetween, The direction in which the projections 43 are arranged to be positioned therebetween is parallel or perpendicular to the sides of the rectangular plate. The irregular pattern portions 30 and 40 may have a configuration in which the aforementioned directions are inclined at an angle of 45 degrees or a predetermined angle with respect to the sides of the plate.

The outer circumferential region 50 of each heat exchange plate 10, 20 is provided in the form of a flat portion along each side edge. These plates overlap each other to face each other in the same direction, and a gasket member 60 is disposed between the outer circumferential regions 50 of these plates. The surface of the heat exchange plate 10 from which the protrusions 31 protrude is the front face, and the surface of the heat exchange plate 20 from which the protrusions 43 protrude is the front face.

The heat exchange plates 10, 20 are positioned so that the front faces facing the same direction overlap each other and are combined into the heat exchange unit 1. In this assembled state, the outer circumferential regions 50 of the two adjacent plates 10 and 20 are in contact with each other, and the protrusions 31 of the irregular pattern portion 30 of the heat exchange plate 10 are heat exchange plate 20. Contact with the protrusions formed on the two sides of the recessed portion 41 of the irregular pattern portion 40 of the), and the protrusions formed at the rear of the recessed portion 34 of the irregular pattern portion 30 of the heat exchange plate 10. The protrusion 43 of the irregular pattern portion 40 of the heat exchange plate 20 is in contact with the protrusion 43. As a result, a gap is formed between two adjacent plates 10 and 20 except for the contact portion, through which the heat exchange fluid flows.

In the first gap portion 61 in which the projections 31 of the irregular pattern portion 30 protrude, the intermediate projections 33 face each other at a constant distance from the rear of the corresponding intermediate valley portion 42. The height is lower than 31, and the recess 34 is lower than the intermediate valley portion 42 facing at a constant distance from the back of the corresponding protrusion 43. The gap portion formed on the front surface side of the intermediate protrusion 33 communicates with the gap portion formed on the front surface side of the concave portion 34 to form a linear flow path. Each linear flow passage having a flow passage in which the cross-sectional area is increased from the intermediate projection 33 toward the concave portion 34 extends linearly by repeating the enlargement region and the reduction region, while extending in a direction perpendicular to the above-described direction. The enlarged region and reduced region are likewise repeated in the same orthogonal direction. The first gap portion 61 is in communication with the other first gap portion 61 and the outside in the openings 11, 13, 21, 23 provided at two corners on the same side of the heat exchange plate 10, 20.

In the second gap portion 62 in which the projections 43 of the irregular pattern portion 40 protrude, the tunnel-shaped gap portion formed between the intermediate valley portion 42 and the rear side of the corresponding intermediate projection 33 is a concave portion. The space provided between the back of the corresponding projection 41 and 41 is connected to each other to form a linear flow path. Each linear flow passage having a flow passage in which the cross-sectional area is increased from the intermediate protrusion 42 toward the recess 41 is extended linearly by repeating the enlarged region and the reduced region in the direction in which the recess 41 is aligned, while In the linear flow path extending in the direction perpendicular to one direction, the enlarged area and the reduced area are similarly repeated in the same orthogonal direction. The second gap portion 62 is the second gap portion 62 which is different from the openings 12, 14, 22, 24 provided at corners other than the corners at which the openings 11, 13, 21, and 23 described above are provided. And communicate with the outside.

Both sides of each of the first and second plates having an uneven pattern are asymmetrical to each other, and the first and second plates are alternately overlapped so that corresponding surfaces of these plates which are symmetric to each other face each other and are combined to form a unit. . As a result, the first gap portion 61 and the second gap portion 62 are different in shape and size from each other. The difference in shape and size between the first gap portion 61 and the second gap portion imparts different heat transfer characteristics to these gap portions. By forming an uneven pattern on the plate in advance in order to determine the shape and size of the gap portion in consideration of the characteristics of the two kinds of fluids to be heat exchanged, it is possible to provide appropriate flow conditions and heat transfer characteristics for these fluids. The heat exchanger is designed such that heat exchange fluid having respective characteristics is introduced into the corresponding first and second gap portions 61 and 62.

As another feature of the heat exchange plates 10, 20, the plates are symmetrical in the opening and irregular pattern portions 30, 40 with respect to the center of the short side of the plate. Thus, by rotating the inside of the first heat exchange plate 10 180 degrees outward, the long side of the plate changes position, providing a state in which only the unevenness is reversed and the uneven position is maintained with respect to the unrotated plate. Thus, the rotated plate 10 and the other non-rotated plate 20 are identical to each other in the inner region of the outer circumferential region 50.

When the inside of the first plate is rotated outward, the same shape can be obtained even in the second plate of the predetermined region including the irregular pattern portions 30 and 40. Therefore, in the same manner, it is possible to form the irregular pattern portions 30 and 40 for the two kinds of heat exchange plates 10 and 20. In this case, the irregular pattern portions 30 and 40 as described above are formed by using a press forming apparatus in which the position of the die portion of the press forming apparatus corresponding to the outer circumferential region 50 of the plate can be adjusted with respect to other positions. The press-molding apparatus is disclosed, for example, in Japanese Patent Laid-Open No. 2003-275825 invented by the inventor of the present invention. In the use of such an apparatus, the adjustment of the position of the auxiliary die portion for forming the outer circumferential region 50 with respect to the central main die portion for forming the irregular pattern portions 30 and 40 in the press direction is made in the press apparatus and thus The press molding process is thus performed. In this case, it is possible to manufacture two different kinds of plates using the same die, and therefore the manufacturing efficiency is quite high.

Hereinafter, the assembling steps of the heat exchange unit according to the present invention will be described. Two types of heat exchange plates 10 and 20, that is, a plurality of plates 10 and a plurality of plates 20 having the same shape in the outer circumferential region 50 but having symmetrical irregular pattern portions 30 and 40 in the central portion. ) Is preliminarily prepared by the press molding method.

The predetermined number of heat exchange plates 10 and 20 overlap each other, and after the gasket member 60 is disposed between the outer circumference region 50 of the plate and the outer circumference of the opening, the heat exchange plates 10 and 20 alternately overlap. Except for the conventional plate type heat exchanger, the plate 10 is tightened from both sides in the alignment direction of the plate so that the inside of the plate 10 is rotated outward with respect to the plate 20 and the long side position of each plate 10 is changed. As the surfaces forming the irregular pattern portions 30 and 40 face each other, a heat exchange unit 1 is formed in which all the plates are tightly combined with each other.

In the heat exchange unit 1 thus obtained, the first gap portion 61 is formed on the side where the protrusion 31 of each heat exchange plate 10 is located, and the openings 11, 13, 21, 23 are formed in the first gap. It communicates with the part 61. A second gap portion 62 is also formed as a gap at an adjacent position with the first gap portion 61 and the heat exchange plates 10 and 20 interposed therebetween, and the openings 12, 14, 22, and 24 are formed in the second gap. In communication with the unit 62. When a heat exchange unit 1 consisting of plates combined in the above-described manner is used, one side of both sides of each plate is arranged horizontally or vertically, and the main part in the gaps 61 and 62 between the plates. A flow path, that is, a gap extending continuously along each recess 34 and the intermediate protrusion 33 of the heat exchange plate 10, and each recess 41 and the intermediate valley portion 42 of the heat exchange plate 20 are separated. The continuously extending gap thus remains inclined.

Hereinafter, the operation of the heat exchange unit according to the embodiment of the present invention, which serves as a heat exchanger, will be described. Heat exchange fluid is introduced into and discharged from the first gap portion 61 through the two openings 11, 13, 21, 23 of each heat exchange plate 10, 20 for forming the heat exchange unit 1, Another heat exchange fluid enters and exits the second gap 62 through the other two openings 12, 14, 22, 24 of each heat exchange plate 10, 20.

In each gap portion 61, 62 through which the heat exchange fluid flows, the flow path is mainly in the inclined direction in which the protrusions 31, 42 and the recesses 34, 41 are aligned, mainly the recesses and the intermediate protrusions 33 or the middle. It extends linearly around the valleys 42. The heat exchange fluid flows in the aforementioned flow path. As a result, the heat exchange fluid flows in an inclined direction in a flow path having a specific shape in which the enlarged region and the reduced region are repeated in the gaps 61 and 62, and naturally branches and merges repeatedly to exchange heat exchange plates 10 and 20. It spreads smoothly to all the area | regions of the upper and lower plates of the irregular pattern part 30 of FIG. Even when the two types of heat exchange fluid are flow relations based on any of the parallel flow system, the counter flow system, and the cross flow system, the heat exchange fluid is subjected to substantially the same conditions and the pressure loss is reduced to smooth the flow of the heat exchange fluid. Can be achieved.

The heat exchange fluid spreads evenly over all areas of each of the gaps 61 and 62 formed between the plates, thereby improving heat transfer between the plate and the heat exchange fluid. In addition, the heat exchange fluid is evenly spread over all the regions of the gap portions 61 and 62 having a unique shape in which the heat exchange fluid is formed between the plates, and the expansion zones and the reduction zones are alternately located, thereby sufficiently considering the characteristics of the heat exchange fluid on both sides of the plate. Differently shaped flow paths are provided for heat transfer characteristics. Therefore, heat transfer proceeds efficiently between each heat exchange fluid passing through the gap portion and each heat exchange plate 10, 20, so that heat exchange can be performed smoothly between the heat exchange fluid passing through the heat exchange plates 10, 20. .

According to the heat exchange unit according to the embodiment of the present invention, the two kinds of plates for the heat exchange plates 10 and 20, that is, the shapes of the outer circumferential regions are substantially identical to each other, but each central irregularity is symmetric with each other so that the uneven pattern is inversely related. First and second plates provided with the pattern portions 30 and 40 are used. These two types of plates, i.e., the first and second plates, are alternately overlapped so that the outer circumferential regions 50 of the first and second plates face the same direction, and the outer circumferential regions 50 of the plates 10, 20 When the gasket member 60 is arranged and tightened between them, two types of gaps 61 and 62 are formed between these plates, and these gaps are formed on two adjacently combined plates having a central irregular pattern portion. Accordingly, the shape and size on both sides of the plate are different. Two adjacent gaps provide flow paths having different characteristics from each other to exhibit different heat transfer performance. By forming the flow path according to the characteristics of the heat exchange fluid, heat exchange can be efficiently performed between the plate and the heat exchange fluid, and thus heat exchange between these fluids is efficiently performed.

According to the heat exchange unit according to the embodiment of the present invention, the irregular pattern portion 30 has a projection 31 surrounded by four adjacent projections 31 through the intermediate projection 33 and the recesses 34 have two. The irregular pattern portion 40, which is positioned to deviate from the protrusion by half distance between two adjacent protrusions, also has a basic configuration having a similar arrangement. However, the present invention is not limited to this embodiment. Except for the specific design in which the irregular pattern portions 30 and 40 of the heat exchange plate 10 and 20 have a symmetrical shape to each other, they may be made in any desired configuration, for example, the projection shape between the projections and the irregular pattern portion. An adjustment may be made to the presence or absence of intermediate protrusions and the number of other protrusions surrounding the protrusions. Such a modified configuration can be adjusted to appropriately correspond to the characteristics of the heat exchange fluid flowing into the gap between the plates.

 According to the heat exchange unit according to the embodiment of the present invention, the projections 31 of the irregular pattern portion 30 each have a polygonal pyramidal shape. However, the protrusion may have a shape of a pyramid such as a pentagonal pyramid or a hexagonal pyramid, or a shape of a truncated cone to suit the performance of the heat exchanger.

According to the heat exchange unit according to the embodiment of the present invention, two kinds of plates having irregular pattern portions 30 and 40 having symmetrical shapes of each other alternately overlap the heat exchange plates 10 and 20 and a gasket between these plates. It is used in the heat exchange unit of the type in which the member 60 is disposed. However, the present invention is not limited only to this embodiment. When the plates are placed in parallel with each other and soldered in a watertight manner, two kinds of plates having the same shape of the outer circumferential region but having symmetrical irregular pattern portions can be used, so that the same heat exchange characteristics and high A heat exchange unit having a pressure resistance is provided.

Claims (3)

It includes a plurality of heat exchanger plates having a predetermined irregular pattern and formed in a metal thin plate and combined in parallel to each other, wherein the first gap portion and the second heat exchange fluid through which the first heat exchange fluid is passed between the plurality of heat exchange plates In the heat exchange unit in which the second gap portion passing through is alternately provided, The heat exchange plate includes a first plate and a second plate having substantially the same shape as the outer circumferential region but having different center irregular pattern portions from each other. The irregular pattern portion of each of the first and second plates has a concave-convex pattern on one surface and an opposite concave-convex pattern corresponding to the concave-convex pattern on the other surface, and the concave-convex pattern is different from each other so as to be asymmetrical with the concave-convex pattern. The concave-convex pattern of the first plate has an opposite concave-convex relationship to be symmetrical with the concave-convex pattern of the second plate, The first and second plates are alternately superimposed so that the outer circumferential regions of the first and second plates face the same direction and are spaced at predetermined intervals from each other, so that the protrusions of the irregular pattern portion of the first plate are 2 the projection of the irregular pattern portion of the plate and in contact with each other Heat exchange unit, characterized in that. The method of claim 1, The first and second heat exchange plates each have a rectangular or square shape, At least the irregular pattern portion of each of the first and second plates has a symmetrical shape with respect to a central position between both sides of the pair of plates or both sides of the other pair of plates. Heat exchange unit, characterized in that. The method according to claim 1 or 2, The irregular pattern portion of each of the heat exchange plates has projections protruding outward from the surface of the heat exchange plate in the form of a truncated cone or a polygonal truncated cone, and the plurality of intermediate projections of each of the irregular pattern portions are adjacent to each other at the shortest distance. Positioned between the projections, each intermediate projection formed by one or more flats or bends extending on opposite sides of the two projections, each intermediate projection being located at a lower position than the top of the projection; Have one or more vertices,  In the arrangement state in which a plurality of combinations of intermediate protrusions are interposed between the protrusions and the other protrusions adjacent to the protrusions in the shortest distance at the same time, A plurality of nasal protrusions are respectively located between adjacent middle protrusions, and each of the nasal protrusions is positioned at a minimum height with respect to the protruding direction of the protrusions, and the non-projecting portions are recessed portions surrounded by the protrusions and the intermediate protrusions. Provided Heat exchange unit, characterized in that.

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