KR20070061448A - Heat exchange plate - Google Patents

Abstract

A heat exchanging plate is provided to maximize a heat-transmitting performance for a heat-exchanging fluid by dispersing the fluid flowing on both surfaces of the plate to all corners of the plate. A heat exchanging plate includes a main heat transmitting unit(16), and at least one fluid guiding unit(10). The main heat transmitting unit operates as a center unit with a first irregular sub-pattern to form a part of a predetermined irregular pattern. The fluid guiding unit has a second sub-pattern which is different from the first irregular sub-pattern and forms the rest of the predetermined irregular pattern, forms at least one of an inlet and an outlet for a heat exchanging fluid with an edge of other plate coupled with the heat exchanging plate to constitute the heat exchanger, and is arranged at a predetermined position over a predetermined area around the edge of the plate. The second irregular sub-pattern of the fluid guiding unit includes a plurality of protrusions(11) on a first surface of the plate, and a plurality of concave units concave opposite to the protrusions and placed between the protrusions. The protrusion includes a top unit having a flat unit, and an outer peripheral surface having a curved surface, and is arranged in a straight line or a curved line to be surrounded by other protrusions. The concave unit includes a flat surface and a bottom part having a connected curved surface at an outer peripheral surface of each protrusion, and is arranged in a straight line or a curved line parallel to the arranging line of the protrusion. At least a part of a plurality of straight lines or curved lines of the protrusions and the concave units has an end placed at the predetermined position of the edge of the plate forming the inlet or the outlet, and the other end placed at a boundary between the fluid guiding unit and the main heat transmitting unit.

Description

Heat exchange plate {HEAT EXCHANGE PLATE}

1 is a schematic structural diagram of a heat exchange plate according to a first embodiment of the present invention.

2 is a perspective view illustrating a flow state of a fluid between heat exchange plates according to a first embodiment of the present invention assembled into a heat exchanger unit.

3 is a schematic diagram illustrating a flow state of a fluid at the surface of the fluid guide portion of the heat exchange plate according to the first embodiment of the present invention.

4 is an enlarged view of a portion of each of "A" and "B" shown in FIG. 1.

5 is a cross-sectional view taken along line V-V of FIG. 4.

6 is a cross-sectional view taken along the line VI-VI of FIG. 4.

7 is a cross-sectional view of one gap between heat exchange plates according to the first embodiment of the present invention.

8 is a cross-sectional view of the other gap between heat exchange plates according to the first embodiment of the present invention.

9 is a schematic structural diagram of a heat exchange plate according to a second embodiment of the present invention.

FIG. 10 is a schematic diagram illustrating a flow state of fluid in both surfaces of a fluid guide part of a heat exchange plate according to a second embodiment of the present invention. FIG.

FIG. 11 is an enlarged view of a portion “E” of FIG. 10.

12 is a cross-sectional view taken along the line XII-XII of FIG. 11.

FIG. 13 is a cross-sectional view taken along the line XIII-XIII of FIG. 11.

14 is a schematic structural diagram of a heat exchange plate according to a third embodiment of the present invention.

Fig. 15 is a schematic diagram illustrating a flow state of fluid in both surfaces of a fluid guide part of a heat exchange plate according to a third embodiment of the present invention.

FIG. 16 is a cross-sectional view taken along line XVI-XVI of FIG. 15.

17 is a cross-sectional view along the line XVII-XVII in FIG. 15.

FIG. 18 is a cross-sectional view along the line XVIII-XVIII of FIG. 15.

19 is a cross-sectional view taken along the line XIX-XIX in FIG. 15.

Explanation of symbols on the main parts of the drawings

1, 2, 3: heat exchange plate 10, 20, 30: fluid guide

11, 21, 31, 35: protrusions 11a, 21a, 31a: top

12, 22, 32, 36: main part 12a, 22a, 32a: bottom part

13, 23, 33, 34: transition surface portion

14, 15, 24, 25: gap 16, 26, 37: main heat transfer part

38, 39: gap 50: opening

61, 71: fluid supply part 62, 72: fluid recovery part

Japanese Patent Application Laid-Open No. 3-91695

JP 2003-194490 A

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchange plate formed of a thin metal plate and used to integrally combine with another heat exchanger plate having the same structure in parallel with each other to form a heat exchanger, and in particular, a fluid for heat exchange on each side of the heat exchanger. The present invention relates to a heat exchange plate capable of providing an integrally coupled state for a heat exchanger in which proper heat exchange can be made between heat exchange fluids while allowing fluid to flow smoothly, thereby ensuring sufficient heat exchange performance and increasing heat exchange performance.

Conventionally, when using a heat exchanger that transfers heat (i.e., heat exchange) between a high temperature fluid and a low temperature fluid, a plate type heat exchanger has been frequently used when a heat transfer rate is desired to increase heat exchange performance. Such a plate heat exchanger has a structure in which a plurality of heat transfer plates are overlapped at predetermined intervals in parallel to form a flow path separated by each heat transfer plate. Hot fluid and cold oil flow alternately in the flow path and heat exchange through each heat transfer plate. A typical example of such a conventional plate heat exchanger is described in Japanese Patent Laid-Open No. 3-91695, which is shown in FIGS. 5 and 6 in the above publication.

In the conventional plate heat exchanger, a gasket formed of an elastic material is provided between two adjacent plates so as to maintain the space between two adjacent plates at the same time and form as a passage portion of the fluid. However, the high pressure of each heat exchange fluid flowing between each plate may deform the gasket members, which may render the fluids unable to segregate or the plate spacing undesirably change. In such a case, heat exchange cannot be performed effectively, which may cause a problem. In this respect, the conventional heat exchanger has a problem that the heat exchange fluid can be used only within a pressure range that the gasket member can withstand.

Recently, a heat exchanger having a structure in which a plate is assembled into a single unit so as to form a heat exchange fluid flow path on both sides of each plate by joining together by metal thin plate welding arranged at predetermined intervals without using a gasket is used. It is proposed. Japanese Patent Laid-Open No. 2003-194490 discloses a heat exchange unit arranged in parallel with each other such that heat transfer plates formed of metal thin plates are spaced apart from each other as an example of the invention made by the present inventors. Except for the face, it is welded at its periphery to form an integral body with openings, the openings being closed by end plates.

The conventional heat exchanger has the structure shown in the said Unexamined-Japanese-Patent No. 3-91695 and Unexamined-Japanese-Patent No. 2003-194490. According to the heat exchanger having the structure described in Japanese Patent Laid-Open No. 2003-194490, that is, a heat exchanger of a type that does not form an opening on a plate without using a gasket, an opening serving as an inlet and an outlet for a fluid is provided. It can be set at the edge of the plate, so that the inlet and outlet for the fluid can be set larger than the conventional plate having the opening. As a result, the resistance of the heat exchange fluid flowing into or exiting the heat exchanger can be significantly reduced.

Since the fluid inlet and outlet are coupled to two adjacent plates in the heat exchanger, they are not formed at the entire length of the edge of the plate, but are formed only at a part such as a corner of the plate. Thus, in order to increase the contact area between the flowing heat exchange fluid and the plate, after introducing the heat exchange fluid from the inlet, it is necessary to expand the flow of the heat exchange fluid to the full width of the plate.

However, if the heat transfer portion of the plate has a constant irregular pattern, the protrusions and recesses formed with emphasis on heat transfer performance cause resistance to the heat exchange fluid introduced from the inlet portion. As a result, the heat exchange fluid actually flows in the shortest flow path with the least resistance, as it flows directly from the inlet side to the outlet side. Therefore, it is difficult to extend the flow of the heat exchange fluid over the width of the plate so that the fluid does not reach an area far from the shortest flow path, and specifically, the fluid is laterally far from the inlet and the outlet. It does not reach the edge side, causing the problem that the heat exchange fluid cannot easily reach the entire heat transfer surface of the plate. Therefore, there is a problem that it is difficult to secure a sufficient area for effectively conducting heat transfer between the heat exchange fluid and the heat transfer surface, and to improve the heat transfer efficiency between the two heat exchange fluids sandwiching the plate.

The present invention has been made to solve the above problems, the object of which is to disperse the heat exchange fluid flowing on both surfaces of the plate to all corners of the plate, to maximize the heat transfer performance for the heat exchange fluid, SUMMARY OF THE INVENTION An object is to provide a heat exchange plate in which an irregular sub-pattern is formed in the vicinity of at least one of the inlet and the outlet for the heat exchange fluid, with emphasis on the heat transfer performance and the flexible flow of the fluid.

In order to achieve the above object, the heat exchange plate of the first aspect of the present invention is formed of a metal plate having a predetermined irregular pattern, and is superimposed on each other, and heat exchanges between heat exchange fluids in contact with both sides of the heat exchange plate. A heat exchanger plate to be combined with one or more other heat exchanger plates having the same structure, so as to form a heat exchanger made up thereof, the method comprising: (i) acting as a central part having a first irregular sub-pattern for forming a portion of the predetermined irregular pattern; Another plate having a primary heat transfer portion and (ii) a second sub-pattern different from the first irregular sub-pattern and forming the remainder of the predetermined irregular pattern, the combined heat exchange plate to constitute the heat exchanger At least one of the inlet and outlet for the heat exchange fluid together with the edge of the Includes at least one fluid guide portion disposed at a predetermined position over a predetermined area near the edge of the plate, and wherein the second irregular sub-pattern of the fluid guide portion is formed on a first surface of the plate. A plurality of protrusions formed in an aligned state and concave in a direction opposite to the direction of protrusion of the protrusions, the plurality of protrusions respectively positioned at an intermediate position between two or more of the protrusions, and each of the protrusions includes: A top portion having a substantially flat portion of a predetermined size, and an outer circumferential surface having a substantially conical surface or a curved surface, each of the protrusions being straight or so that one of the protrusions is surrounded by other protrusions located at predetermined intervals. Arranged in a curve, each of the recesses being a substantially flat flat surface of a predetermined size, and A bottom portion having an inner circumferential surface having a curved surface continuously connected to an outer circumferential surface of each protrusion surrounding the recess, wherein the recess is aligned in a straight line or curve parallel to the alignment line of the protrusion, the protrusion and At least some of the plurality of straight lines or curves in which the recesses are aligned do not coincide with one end positioned at a predetermined position of the edge of the plate forming at least one of the inlet and outlet, and the one end And the other end positioned on the boundary between the fluid guide portion and the main heat transfer portion.

According to the first aspect of the present invention, the protrusion and the recess are inlet and / or outlet at a predetermined position over a predetermined area near the edge of the plate forming at least one of the inlet and outlet of the heat exchange fluid. Fluid guides are formed that are aligned in a straight or curved line between the and the main heat transfer portion. The plurality of plates having the structure overlap with each other so that the top portion of the protrusion or protrusion formed on the back side of the recess of the plate is in contact with the top of the protrusion or protrusion formed on the back side of the recess of the other adjacent plate. When combined to form an assembly unit for a heat exchanger, a simple coupling of a flow path directly extending in a straight or curved line from the inlet and / or outlet to the main heat transfer section, in the fluid guide between two adjacent plates And a flow path is formed between the inlet and / or outlet and the main heat transfer section with a minimum limit to divert the flow direction of the heat exchange fluid. When the heat exchange fluid flows through the flow path in the fluid guide part of the plate, the fluid flows flexibly through the fluid guide part and is uniformly introduced into the main heat transfer part or quickly discharged from the outlet part. In particular, the fluid can flow uniformly from the fluid guide to the boundary and be introduced into the main heat transfer portion, as a result of which the fluid can be distributed to all corners of the main heat transfer portion to make almost all of the area of the plate act as an effective heat transfer portion. Therefore, the heat transfer between the plate and the heat exchange fluid is ensured, the heat transfer amount is increased, and heat exchange is efficiently performed between the heat exchange fluids, thereby achieving high performance of the heat exchanger.

In a second aspect of the heat exchanger plate of the invention, the plate has a square or rectangular shape and at least one of the inlet and the outlet for the heat exchange fluid is at least part of the edge of at least one of the edges of the plate. The protrusion and the concave portion of the fluid guide portion are formed in a linear alignment in a direction parallel or perpendicular to the edge of the plate may be adopted.

According to the second aspect of the present invention, the direction of alignment of the protrusions and recesses of the fluid guide is parallel or perpendicular to the sides of the square or rectangular plate. When a plurality of plates are overlapped and joined together, a flow path is formed between the two adjacent plates, the protrusions and the recesses linearly extending in the longitudinal and transverse directions, which are aligned and crossed at right angles. Between the plates at the inlet side when the inlet and outlet for the heat exchange fluid are located at the side edges of the plate and the fluid enters and exits the fluid guide in a direction perpendicular to the alignment direction of the fluid guide and the main heat transfer portion. The heat exchange fluid introduced into the gap can pass directly through each flow path of the fluid guide and then rotate at right angles to reach the main heat transfer. Therefore, the heat exchange fluid can be uniformly flowed from the fluid guide part to all corners of the main heat transfer part, including the area far from the inlet part, so that the configuration of the flow path changes with the inflow and outflow directions of the fluid. Thus, the heat exchange fluid can be dispersed at all corners of the plate, thereby promoting heat transfer between the plate and the fluid, thereby improving heat exchange performance.

In a third aspect of the heat exchanger plate of the invention, the protrusions are arranged at predetermined equal intervals based on the matrix arrangement in two directions parallel or perpendicular to the edges of the plate and orthogonal to each other, each of the recesses being: Disposed in the center of the minimum square region formed by the four protrusions to form a matrix arrangement similar to the matrix arrangement of the protrusions, wherein the protrusions and the recesses are provided at predetermined intervals for the matrix arrangement. Forming a substantially sinusoidal waveform in the cross-section of the plate in an aligned alignment direction, between an intermediate portion between the protrusions adjacent on the first side of the plate, and between the recesses adjacent on the second side of the plate. The middle part is the bottom part of the said recessed part, and the said protrusion part in the protrusion direction of the said projection part. A structure that is located at the middle height between the top output portion may be adopted.

According to the third aspect of the present invention, the protrusions and the recesses are formed based on the matrix arrangement at equal intervals, the middle portion between two adjacent protrusions and the middle portion between two adjacent recesses have a curved shape, thereby guiding fluid The portion forms a curved shape with a constant periodic change in the alignment direction of the protrusion and the recess. Thus, the pressure loss between the plates of the assembly unit of the heat exchanger is controlled, and a smooth flow of heat exchange fluid and a flexible heat transfer are achieved, thereby improving heat exchange performance. In addition, a curved shape that is flexible in a predetermined direction can disperse the force applied to the plate, strengthen the strength to cope with the high pressure of the fluid, and improve the formability of the plate. In addition, even when seawater is introduced into the gap between the plates as one of the heat exchange fluids, biological contamination does not easily adhere to the curved surface, and thus the performance deterioration is prevented over a long period of time.

In a fourth aspect of the heat exchange plate of the present invention, at least one of the inlet for the heat exchange fluid and the outlet is formed in the form of an opening formed on the plate with respect to at least one heat exchange fluid, wherein the The protrusions and the recesses are aligned based on a curvilinear arrangement from the outer edge of the opening to the boundary between the fluid guide and the main heat transfer portion, and then the fluid from a direction perpendicular to the outer edge of the opening. It is possible to adopt a structure that is gradually curved in a direction perpendicular to the boundary line between the guide portion and the main heat transfer portion.

According to the fourth aspect of the invention, according to the shape of the plate having openings formed as inlets and outlets for the heat exchange fluid, the protrusions and recesses of the fluid guide are based on a curved arrangement having a line connecting the openings to the main heat transfer section. Are aligned. When a plurality of plates overlap each other and are combined to form an assembly unit for a heat exchanger, a flow path between the plates is continuously extended in a curved shape according to the arrangement of the protrusions and the recesses to communicate with each other. When the fluid enters and exits the fluid guide through the opening, the heat exchange fluid introduced into the gap between the plates through the opening on the inlet side passes directly through the curved flow path of the fluid guide to reach the main heat transfer portion. Can be. Thus, the heat exchange fluid can flow uniformly from the fluid guide to all corners of the main heat transfer portion, including the portion away from the inlet portion of the main heat transfer portion, so that the configuration of the flow path varies with the inflow and outflow direction of the fluid. Thus, the heat exchange fluid can be distributed to all corners of the plate, thereby facilitating heat transfer between the plate and the fluid, and improving heat exchange performance.

In a fifth aspect of the heat exchanger plate of the invention, the plate has a square or rectangular shape and at least one of the inlet and the outlet for the heat exchange fluid is in the form of an opening formed on the plate for one heat exchange fluid. And for other heat exchange fluids, a portion over the entire length or a portion of the edge of at least one of the edges of the plate, wherein at least a portion of the protrusion of the fluid guide is based on the curved arrangement of the plate The edge may be arranged near the line connecting the predetermined position of the edge to the boundary line between the fluid guide portion and the main heat transfer portion so as to be linearly aligned, and the concave portion may not be disposed in the linear arrangement of the protrusions.

According to a fifth aspect of the present invention, the inlet and / or outlet for the heat exchange fluid, in addition to the opening, is formed in a predetermined region of the edge of the plate and at least some of the protrusions formed on the basis of the curved arrangement are inlet. And / or a straight array is formed near the straight line connecting the outlet to the main heat transfer portion. As a result, the corresponding recesses formed in the second face of the plate are linearly aligned to form the main part of the fluid flow path on the second face of the plate. Thus, the fluid passing through the opening and flowing on the first side of the plate is properly flowed between the opening and the main heat transfer portion, and other fluid flowing along the second side of the plate but not passing through the opening inlet at the edge of the plate. And / or flows flexibly between the outlet and the main heat transfer, thereby performing heat transfer between the heat exchange fluids through the plates with the first and second surfaces, thereby improving heat exchange performance between the fluids.

In a sixth aspect of the heat exchange plate of the present invention, each of the protrusions of the second irregular sub-pattern of the fluid guide portion projecting from the first surface of the plate is provided in the recess formed in the first surface of the plate. Each of the recesses of the second irregular sub-pattern of the fluid guide portion having the same shape as the corresponding protrusion projecting from the second surface of the plate to be correspondingly concave from the first surface of the plate, Adopt a structure that has the same shape as the corresponding recessed portion that is recessed from the second side of the plate so as to correspond to the protrusion formed on the first side of the plate, thereby forming the same irregular sub-pattern on both sides of the plate; Can be.

According to a sixth aspect of the invention, the fluid guide forms an irregular sub-pattern on the first side of the plate and an inverted irregular sub-pattern on the second side of the plate such that the protrusion on the first side of the plate Corresponds to the recess on the second surface of the plate. As a result, when a plurality of plates overlap each other and are joined together to form an assembly unit for a heat exchanger, adjacent gaps between two adjacent plates, including the area formed by the protrusions and the recesses, are formed. It has a similar configuration depending on the protrusion-concave relationship on the first and second sides. Thus, the same heat transfer environment can be imparted on both sides of the plate to the heat exchange fluid passing through the gap between the plates. Thus, proper heat transfer between the fluids can proceed through the plate without being affected by the flow conditions or properties of the fluids, so that heat exchange is efficiently performed between the heat exchange fluids.

(First embodiment of the present invention)

Now, a first embodiment of the present invention will be described with reference to Figs. 1 is a schematic structural diagram of a heat exchanger plate according to a first embodiment of the present invention, and FIG. 2 is a perspective view illustrating a flow state of fluid between heat exchanger plates according to a first embodiment of the present invention assembled to a heat exchanger unit. 3 is a schematic diagram illustrating a flow state of a fluid at a surface of a fluid guide portion of a heat exchange plate according to a first embodiment of the present invention, and FIG. 4 is a view illustrating each of "A" and "B" shown in FIG. 5 is a cross-sectional view taken along the line VV of FIG. 4, FIG. 6 is a cross-sectional view taken along the line VI-VI of FIG. 4, and FIG. 7 is a heat exchange plate between the heat exchange plates according to the first embodiment of the present invention. Is a cross-sectional view of one gap, and FIG. 8 is a cross-sectional view of the other gap between heat exchange plates according to the first embodiment of the present invention.

In each of the above drawings, the heat exchange plate 1 according to the first embodiment of the present invention is formed of a rectangular metal plate. At each position near a predetermined edge of the plate serving as the inlet and outlet for the heat exchange fluid, an irregular sub-pattern comprising a plurality of protrusions 11 and a plurality of recesses 12 in the heat exchange plate (ie , A fluid guide 10 having a second irregular sub-pattern) is provided. The protrusions 11 having a predetermined convex shape are formed on the upper surface of the plate so as to be aligned at irregular intervals based on the matrix arrangement. Each recess 12 is formed in an intermediate portion between adjacent protrusions 11 so as to concave in a direction opposite to the protrusion direction of the protrusion 11.

The fluid guide portion 10 extends over the inlet and outlet for the heat exchange fluid in the longitudinal direction of the assembled state for the heat exchanger unit, and extends over the entire length of the edge of the plate in the transverse direction. It is placed in the adjacent area of the short edge. The fluid guide 10 includes protrusions 11 and recesses 12 that are aligned at predetermined intervals in a direction parallel or perpendicular to the edge of the plate.

Each protrusion 11 includes a top portion 11a formed as a circular flat portion, and an outer circumferential surface having a rotationally symmetric curved surface shape connected to and extending from the top portion 11a and widening toward the bottom surface. The protrusions 11 are arranged in a matrix arrangement on the surface of the plate at predetermined intervals in two directions, parallel or perpendicular to the edge of the plate.

Each recess 12 includes a bottom portion 12a formed as a circular flat portion, and an inner circumferential surface composed of a rotationally symmetric curved surface so as to extend from the outer circumferential surface of the protrusion 11. The recessed part 12 is formed in the surface of a plate in the opposite direction to the protrusion direction of the protrusion part 11. The recesses 12 are arranged in the same matrix arrangement as the protrusions 11 and are arranged in the center of the smallest square region formed by the four protrusions 11.

The protrusions 11 and the concave portion 12 have cross-sectional shapes of the outer circumferential surface of the protrusion 11 and the inner circumferential surface of the concave portion 12 substantially in the alignment direction of the protrusion 11 and the concave portion 12. Are arranged at predetermined intervals. The transition curved portion 13 is an intermediate position between two adjacent protrusions 11 and two adjacent recesses 12 so as to flexibly connect the curved surfaces of the protrusions 11 and the recesses 12. It is formed at an intermediate position between them. The transition curved portion 13 is concave with respect to the protrusion 11 and is convex with respect to the concave portion 12. The transition curved portion 13 is at the intermediate height position between the bottom 12a of the recess 12 and the top 11a of the protrusion 11.

The outer circumferential surface of the protrusion 11 and the inner circumferential surface of the recess 12 are directly and flexibly connected to each other, and the closest adjacent protrusion 11 and the closest recess 12 are concave closest to the closest adjacent protrusion 11. Fabrics located at four corners of the rectangle formed by the portion 12 are continuously arranged through the curved surface portion 13. As a result, a second irregular sub-pattern of the plate is formed in the plate having a curved surface on which the entire surface is flexibly continuous. Therefore, the force applied to the plate can be dispersed, and the strength is improved to cope with the high pressure of the fluid and the formability of the plate is improved.

In the fluid guide portion 10, the recessed portion 12 forms the same shape as the protrusion 11 on one side (i.e., the bottom side) of the plate, and the protrusion 11 is recessed on the other side of the plate. By forming the same shape as the portion 12, the same irregular second sub-pattern is formed on both sides of the plate.

The heat exchange plate 1 faces the same side, and the top 11a of the protrusion 11 of the plate in front of the fluid guide 10 corresponds to the top 11a of the protrusion 11 of the plate behind. And the top of the protrusion (not shown) of the front plate which forms the first irregular sub-pattern in the main heat transfer part 16, in contact with the corresponding top of the protrusion of the back plate. It is disposed on another heat exchanger plate to form a coupling unit, and the coupling unit thus formed is coupled to the other coupling unit in the same manner, thereby forming a heat exchanger having a gap, that is, a flow path. The heat exchange fluid flows in these flow paths to exchange heat between one fluid in contact with the upper surface of the plate and another fluid in contact with the lower surface. In this way, the plates are integrally joined to each other, so that the protrusions contact each other, so that the strength is enhanced. As a result, even if high pressure is applied between the plates, the heat exchanger is not easily deformed. The change in the distance between the plates is prevented, so that the pressure difference between the heat exchange fluids is also large.

In the gap 14 formed between two adjacent plates of the plate 1 joined as above, in which the top 11a of the protrusion 11 of the plate is in contact with the top 11a of the protrusion 11 of the other plate. In the fluid guide portion 10 of the plates, the corresponding outer circumferential surfaces of the protrusions 11 of these plates 1, excluding the contacting top portions 11a, face each other with a predetermined distance therebetween, The corresponding transition curved portions 13 face each other with a predetermined distance therebetween, and the lower corresponding recessed portions 12 face each other with a predetermined distance therebetween. The gaps formed between the corresponding outer circumferential surfaces of these protrusions 11 communicate with the gaps formed between the corresponding recesses 12, forming a straight flow path. These flow paths extend linearly in the transverse direction and the longitudinal direction in which the protrusions 11 and the recesses 12 are aligned, and communicate with each other while periodically changing in cross section (see FIGS. 7 and 8).

On the other hand, in the gap 15 formed on the opposite side to the plate, the same irregular pattern of the plates forms the same structure, as a result of which the passages extend linearly while repeatedly expanding and contracting, and such flow passages intersect with other flow passages. And communicating, thereby forming a braided flow path structure in the same manner as described above (see FIGS. 7 and 8). When a heat exchanger consisting of plates joined in the above-described manner is used with one of both sides of each plate lying in the horizontal or vertical direction, the main flow passage, that is, the corresponding recessed portion 12 and the transition curved portion The gaps formed by alternating with (13) are kept horizontal or vertical. On the lower surface of the plate, an irregular pattern opposite to the upper surface is formed so that the protrusions of the upper surface of the plate correspond to the recesses of the lower surface of the plate based on the same irregular pattern. These plates are superimposed on the same surface with each other, so that the positions of the protrusions and the recesses are shifted by half the distance between them. Except for this point, the same conditions are maintained for each gap between the plates.

Now, the operation of the heat exchanger composed of the heat exchange plate 1 according to the embodiment of the present invention will be described. It is assumed that in the unit in which the heat exchange plates 1 overlapping each other in parallel are assembled, an opening communicating with the gap 14 and another opening communicating with the gap 15 are formed at corners of each of the upper and lower surfaces of the plate. . Each heat exchange fluid is introduced into the unit from an opening that acts as an inlet and exits from another opening that serves as an outlet so that the heat exchange fluid is between the plates at the position of the main heat transfer 16 based on the countercurrent system. Alternately flow within each gap.

As shown in FIG. 2, in the gap 14 formed between two adjacent heat exchange plates 1, an upper region and a lower region are formed on the upper side and the lower side, respectively. The upper region of the gap 14 is formed by opposing upper fluid guides 10 of two adjacent heat exchange plates 1, and the lower region of the gap 14 is connected to the opposing lower fluid guides 10. Is formed by. The upper region of the gap 14 has a first sub-region on the left side of FIG. 2 and a second sub-region on the right side. The lower region of the gap 14 also has a first sub-region on the left side of FIG. 2 and a second sub-region on the right side.

In the gap 15 formed between two adjacent heat exchange plates 1, an upper region and a lower region are respectively formed on the upper side and the lower side in the same manner as the gap 14. The upper region of the gap 15 is formed by opposing upper fluid guides 10 of two adjacent heat exchange plates 1, and the lower region of the gap 15 is connected to the opposing lower fluid guides 10. Is formed by. The upper region of the gap 15 has a first sub-region on the left side of FIG. 2 and a second sub-region on the right side. The lower region of the gap 15 also has a first sub-region on the left side of FIG. 2 and a second sub-region on the right side.

The heat exchange fluid is introduced transversely into the gap 14 from the first sub-region of the upper region of the gap 14, as shown by the solid arrows in FIG. 2. Another heat exchange fluid flowing in the gap 15 located adjacent to the gap 14 to be separated by the heat exchange plate 1 is, as shown by the solid arrows in FIG. 2, in the second area of the upper region of the gap 15. Eject out from the sub-area. The gaps 14 and 15 formed between the plates 1 by the configuration of the protrusions 11 and the recesses 12 are continuous in the longitudinal direction and the transverse direction in which the protrusions 11 and the recesses 12 are aligned. Extends linearly to form a flow path portion so as to communicate with each other.

Heat exchange fluid flowing in the gap 14 exits out of the second sub-region of the lower region of the gap 14, as shown by the solid arrows in FIG. 2. Another heat exchange fluid flows transversely into the gap 15 from the first sub-region of the lower region, as shown by the dashed arrows in FIG. 2.

The heat exchange fluid first flows horizontally in the upper region of the gap 14 with the introduction power of the gap 14 and then vertically to the region formed by the main heat transfer portion 16 (see FIGS. 2 and 3). . More specifically, the heat exchange fluid flows in the horizontal and vertical directions while repeating the joining and branching at the intersections of the flow paths to reach the edge of the main heat transfer part 16 flexibly and uniformly. The heat exchange fluid can reach the edge of the main heat transfer portion 16 uniformly, and is flexibly dispersed in each corner of both sides of the heat exchange plate 1.

On the other hand, with respect to the discharge of the heat exchange fluid, this fluid uniformly distributed in the horizontal direction flows into the fluid guide portion 10 from the edge of the main heat transfer portion 16, flows in the horizontal direction toward the outlet portion, and then vertically. Flow. More specifically, the heat exchange fluid proceeds in the horizontal and vertical directions while repeating the joining and branching at the intersections of the flow paths to reach the opening serving as the outlet part flexibly and uniformly. Therefore, the heat exchange fluid is received from the edge of the main heat transfer portion 16 and flows smoothly, thereby avoiding the problem of the adverse effect of the irregular flow in the main heat transfer portion 16 due to the stagnation of the heat exchange fluid.

In the other gap 15, the flow path mainly comprising the recess 12 and the transition curved portion 13 behind the protrusion 11 extends vertically and horizontally in the same manner as the gap 14. However, the gap 15 corresponding to the inlet of the gap 14 acts as the outlet and the portion of the gap corresponding to the outlet of the gap 14 acts as the inlet. The other heat exchange fluid in the gap 15 has a similar flow behavior as the heat exchange fluid in the gap 14. More specifically, the other heat exchange fluid first proceeds in the horizontal direction in the fluid guide portion 10 on the inlet side, and then in the vertical direction, to reach the edge of the main heat transfer portion 16 flexibly and uniformly. . The other heat exchange fluid travels from the edge of the main heat transfer portion 16 to the outlet through the vertical and horizontal flow paths of the fluid guide portion 10 on the discharge side and is discharged to the outside.

Therefore, in the fluid guide portion 10, the pressure loss in the flow path can be suppressed with respect to the two types of heat exchange fluids, and the respective heat exchange fluids can be passed through the gaps 14 and 15 to the main heat transfer portion 16. . Thus, two kinds of heat exchange fluids can be dispersed at all corners of the main heat transfer portion 16, so that heat transfer between the plate and each fluid is promoted, thereby improving heat exchange performance. Also, even when these heat exchange fluids flow between gaps 14 and 15 having an irregular sub-pattern and extending between the fluid guides 10, heat transfer between the fluid guide 10 and the two heat exchange fluids. This proceeds. Therefore, heat exchange between the fluids is realized, and the overall heat exchange performance of the plate is improved by the heat exchange in the fluid guide portion 10.

According to the heat exchange plate 1 according to the first embodiment of the present invention, the protrusion 11 at a predetermined position near the edge of the heat exchange plate 1 forming the inlet and the outlet for the heat exchange fluid 1 is formed. And a fluid guide 10 in which the recess 12 is linearly aligned between the inlet and outlet and the main heat transfer 16. When a plurality of plates having the above structure overlap and are combined with each other to form an assembly unit for a heat exchanger, the inlet and outlet portions are provided in an area in contact with the fluid guide portion 10 in the gaps 14 and 15 between the plates. It is formed by a flow path extending linearly directly to the main heat transfer section 16 and a linear flow path of a simple coupling, with a minimum restriction on diverting the flow direction of the heat exchange fluid between the inlet and outlet sections and the main heat transfer section 16. The branch has a flow path formed therein. When the heat exchange fluid flows through the flow path in the fluid guide portion 10 of the plate, the fluid flows flexibly through the fluid guide portion 10 and is uniformly introduced into the main heat transfer portion 16 or quickly discharged from the outlet portion. . In particular, when the heat exchange fluid flows into the main heat transfer portion 16, the heat exchange fluid introduced into the gap between the plates travels linearly in the horizontal direction in the flow path in the fluid guide 10, rotates at right angles, and then It flows in the vertical direction to reach the main heat transfer part 16. Accordingly, the heat exchange fluid flows uniformly from the fluid guide 10 to all corners of the main heat transfer portion 16, including the area far from the inlet portion, so that the heat exchange fluid is transferred to the main heat transfer portion 16. It can be distributed to all corners of, allowing almost all of the area of the plate to act as an effective heat transfer member. Therefore, the heat transfer between the plate and the heat exchange fluid is ensured, the heat transfer amount is increased, the heat exchange is efficiently performed between the heat exchange fluids, and the high performance of the heat exchanger is achieved.

(2nd Example of this invention)

Now, a second embodiment of the present invention will be described with reference to Figs. FIG. 9 is a schematic structural diagram of a heat exchange plate according to a second embodiment of the present invention, and FIG. 10 is a schematic view illustrating a flow state of fluid at both sides of a fluid guide part of a heat exchange plate according to a second embodiment of the present invention. FIG. 11 is an enlarged view of a portion “E” of FIG. 10, and FIG. 12 is a cross-sectional view taken along the line XII-XII of FIG. 11. FIG. 13 is a cross-sectional view taken along the line XIII-XIII of FIG. 11.

The heat exchange plate 2 according to the second embodiment of the present invention has an irregular sub-pattern in which the plate is formed of a rectangular metal plate and includes a plurality of protrusions 21 and a plurality of recesses 22 in the plate ( That is, it is the same as the heat exchange plate 1 according to the first embodiment of the present invention in that the fluid guide 20 with the second irregular sub-pattern is formed. The plate 2 acts as an inlet and an outlet when the predetermined opposing areas of the upper and lower portions of the plate respectively use the assembled unit for the heat exchanger, and the protrusions 21 and the recesses 22 are the inlets. And the plate 1 of the first embodiment of the present invention in that they are linearly inclined and aligned according to the position of the outlet portion.

The fluid guide portion 20 is formed near each short side of the heat exchange plate 2, and has a length in the longitudinal direction so as to correspond to the inlet and outlet portions of the heat exchange fluid in the heat exchanger unit in which the plate is assembled, and the short side of the plate. It has a transverse length extending throughout. The protrusions 21 and the recesses 22 are aligned along a straight line extending at predetermined intervals directly from the inlet and outlet to the edge of the main heat transfer part 26 in an oblique direction with respect to each edge of the rectangular plate.

Each of the protrusions 21 includes a top portion 21a in which the protrusions 21 are formed in the form of a circular flat portion, and an outer circumferential surface having a curved shape that extends continuously and extends downwardly from the top portion 21a. Is the same as the protrusion 11 of the first embodiment of the present invention. However, the protrusions 21 of the second embodiment of the present invention, in that the protrusions 21 are aligned with the surface of the plate along a straight line arranged at predetermined intervals in the direction inclined with respect to the edge of the plate, It is different from the protrusion 11 of the first embodiment.

Each recess 22 includes an inner circumferential surface having a curved surface extending from the outer circumferential surface of the bottom portion 22a and the surrounding protrusion 21. The recess 22 is formed on the surface of the plate so as to be recessed in the direction opposite to the projecting direction of the protrusion 21. The recesses 22, like the protrusions 21, are aligned along a straight line inclined with respect to the edge of the plate, with each recess 22 having a minimum rhombus shape formed by four protrusions 21. It is placed at the central position of the area.

The protrusions 21 and the recesses 22 are aligned at predetermined intervals, and as a result, the outer circumferential surface of the protrusion 21 and the inner circumferential surface of the recess 22 are in the alignment direction with the protrusion 21 and the recess 22. The cross-sectional shape of is substantially sinusoidal. The transition curved portion 23 is formed at an intermediate position between two adjacent protrusions 21 and at an intermediate position between two adjacent recesses 22 to form the protrusion 21 and the recess 22. Flexibly connect the surface of the In the plate, as in the first embodiment, a second irregular sub- with a whole surface having a smoothly continuous curved surface on the fluid guide portion 20 including the area between the protrusions 21 and the recesses 22. A pattern is formed. Therefore, the force applied to the plate can be dispersed, the strength can be improved to cope with the high pressure of the fluid, and the formability of the plate is improved.

In such a fluid guide 20, the recess 22 forms the same shape as the protrusion 21 on the other side (ie the lower surface) of the plate, and the protrusion 21 is recessed 22 on the surface of the plate. And the same second irregular sub-pattern on both sides of the plate.

The heat exchange plate 2 described above, like the first embodiment of the present invention, faces the same surfaces as other heat exchange plates having the same structure, and is the top of the protrusion 21 of the front plate in the fluid introduction portion 20. 21a is in contact with the top 21a of the projection 21 of the rear plate, and the top of the projection (not shown) of the front plate that forms the first irregular sub-pattern in the main heat transfer 26 A coupling unit, which is located on another heat exchanger plate having the same structure, in contact with a corresponding top of the protrusion of the plate of the plate, and then the coupling unit so formed, in the same manner as in the first embodiment of the present invention. It is coupled to another coupling unit to form a heat exchanger having a gap, ie a passage. The fluid guide in the gap 24 formed between two adjacent plates of the above joined plates in which the top 21a of the protrusion 21 of the plate is in contact with the top 21a of the protrusion 21 of the other plate. At 20, the corresponding outer circumferential surfaces of the protrusions 21 of these plates 2, except for the contacting top portions 21a, which face each other while maintaining a predetermined distance therebetween, the corresponding transition curved portions 23 of these plates. ) Face each other while keeping a predetermined distance therebetween, and the lower corresponding recesses 22 face each other while keeping a predetermined distance therebetween. The gaps formed between the corresponding outer circumferential surfaces of the protrusions 21 communicate with the gaps formed between the corresponding recesses 22 to form a straight flow path in the oblique direction. Adjacent flow paths are aligned to communicate with each other and communicate with each other (see FIGS. 12 and 13).

On the other hand, in the gap 25 formed on the opposite side to the plate, the same irregular pattern forms the same structure, and as a result, the flow path extends linearly while repeating expansion and contraction, and the flow path is different from the above, as described above. Intersecting with the flow path and communicating with each other to form a braided flow path structure (see Figs. 12 and 13). When a heat exchanger consisting of plates joined as described above is used such that one of both sides of each plate is arranged horizontally or vertically, the main flow path, ie the alternating corresponding recesses 22 and the transition curved surface, is used. The gaps respectively formed by the portions 23 are maintained horizontally or vertically. An irregular pattern inverted with respect to the upper surface side is formed on the lower surface side of the plate, so that the protrusion on the upper surface of the plate corresponds to the recessed portion on the lower surface of the plate based on the same irregular pattern. These plates overlap one another with each other, so that the positions of the protrusions and the recesses are shifted by half of the distance between them. Except for this, the same state is maintained for each gap between the plates.

Now, the operation of the heat exchanger constituted by the heat exchange plate 2 according to the embodiment of the present invention will be described. In the unit where the heat exchange plates 1 overlapping each other in parallel are assembled, an upper corner formed by the upper transverse face and the side longitudinal face of the plate, and the lower transverse face and the side length of the plate, among the corners of the plate, are assembled. Assume that at the lower corner formed by the directional face, an opening communicating with the gap 24 and another opening communicating with the gap 25 are formed. Each heat exchange fluid is introduced into the unit from the fluid supply portions 61 and 71 in the oblique direction through the opening serving as the inflow portion, and discharged from the other opening serving as the outlet portion to the fluid recovery portions 62 and 72 for the heat exchange. The fluid flows alternately in each gap between the plates, based on the countercurrent system.

In the upper fluid guide 20 of each heat exchange plate 2, one of the heat exchange fluids is formed on one side of the plate from an upper corner formed by the upper transverse face and the side longitudinal face of the plate 2. It is introduced in the oblique direction into the gap 24. Another heat exchange fluid flowing in another gap 25 located opposite the gap 24 with respect to the heat exchange plate 2 is discharged out from the upper corner located opposite the upper corner described above. The gaps 24 and 25 formed between the plates by the configuration of the protrusions 21 and the recesses 22 extend linearly continuously in the inclined direction in which the protrusions 21 and the recesses 22 are aligned. The flow path portion is formed so as to communicate with each other crosswise.

On the other hand, in the lower fluid guide portion 20, the heat exchange fluid that flows in the gap 24 is discharged outward from the lower corner located at a position opposite to the introduction position. Another heat exchange fluid is introduced in an oblique direction into another gap 25 from an inlet located opposite the outlet described above.

The heat exchange fluid first flows in the oblique direction in the upper region of the gap 24 with the introduction power of the gap 24, and then flows mainly in the initial travel direction while repeating the joining and branching at the intersection of the flow paths, Reach smoothly and uniformly at the edge of 26) (see arrows indicated by solid lines in FIG. 10). The heat exchange fluid can reach the edge of the main heat transfer portion 26 uniformly, flowing to all regions on both sides of the main heat transfer portion 26 of the heat exchange plate 2.

On the other hand, with respect to the discharge of the heat exchange fluid, such a fluid uniformly distributed in the horizontal direction flows into the fluid guide portion 20 from the edge of the main heat transfer portion 16 and enters the protrusions 21 and the recesses 22. It flows in the diagonal direction along the flow path formed by this, and reaches | attains an outflow part, repeating joining and branching at the intersection part of a flow path next. More specifically, the heat exchange fluid flows in the oblique direction and flexibly reaches the opening serving as the outlet. Therefore, the heat exchange fluid can be flexibly received from the edge of the main heat transfer section 26 and flow smoothly, thereby avoiding the problem of the adverse effect of the irregular flow in the main heat transfer section 16 due to the stagnation of the heat exchange fluid.

In the other gap 25, the flow path mainly comprising the recess 22 and the transition curved portion 23 behind the protrusion 21 extends vertically and horizontally in the same manner as the gap 24. However, the gap 25 corresponding to the inlet of the gap 24 acts as the outlet and the portion of the gap corresponding to the outlet of the gap 24 acts as the inlet. The other heat exchange fluid in the gap 25 has a similar flow behavior as the heat exchange fluid in the gap 24. More specifically, the other heat exchange fluid proceeds in the oblique direction in the fluid guide portion 20 on the inlet side, and reaches the edge of the main heat transfer portion 26 flexibly and uniformly. The other heat exchange fluid runs from the edge of the main heat transfer portion 126 to the outlet portion through a flow path extending in the inclined direction of the fluid guide portion 10 on the discharge side, and is discharged to the outside (see the arrows indicated by dashed lines in FIG. 10).

Thus, each fluid in the fluid guide 20 can be directed through the gaps 24, 25 to the main heat transfer 26. Therefore, two kinds of heat exchange fluids can be dispersed at all corners of the main heat transfer portion 26, so that heat transfer between the plate and each fluid is promoted, thereby improving heat exchange performance in the same manner as in the first embodiment of the present invention. Let's do it. In addition, the overall heat exchange performance of the plate is improved by the heat exchange in the fluid guide portion 20.

According to the heat exchange plate according to the second embodiment of the present invention, the protrusions 21 and the recesses 22 are linearly aligned between the inlet and outlet and the main heat transfer part 26. When a plurality of plates having the above structure overlap and are combined with each other to form an assembly unit for a heat exchanger, a flow path is formed between the plates and extends linearly directly from the inlet and the outlet to the main heat transfer part 26. When the heat exchange fluid flows through the flow path in the fluid guide portion 20 of the plate, the fluid flows flexibly through the fluid guide portion 20 and is uniformly introduced into the main heat transfer portion 26 or quickly discharged from the outlet portion. . In particular, when the heat exchange fluid flows into the main heat transfer portion 26, the heat exchange fluid flows uniformly into the boundary position with respect to the main heat transfer portion 26 from the side of the fluid guide 20. Thus, the heat exchange fluid can flow uniformly to all corners of the main heat transfer portion 26, allowing almost all of the area of the plate to act as an effective heat transfer member. Therefore, the heat transfer between the plate and the heat exchange fluid is ensured, the heat transfer amount is increased, the heat exchange is efficiently performed between the heat exchange fluids, and the high performance of the heat exchanger is achieved.

(Third embodiment of the present invention)

Now, a third embodiment of the present invention will be described with reference to Figs. 14 is a schematic structural diagram of a heat exchange plate according to a third embodiment of the present invention, and FIG. 15 is a schematic diagram illustrating a flow state of fluid in both sides of a fluid guide part of the heat exchange plate according to the third embodiment of the present invention. 16 is a cross-sectional view taken along the line XVI-XVI of FIG. 15, FIG. 17 is a cross-sectional view taken along the line XVII-XVII of FIG. 15, FIG. 18 is a cross-sectional view taken along the line XVIII-XVIII of FIG. 15, and FIG. It is sectional drawing along the XIX-XIX line of 15.

The heat exchange plate 3 according to the third embodiment of the present invention has an irregular sub-pattern in which the plate is formed of a rectangular metal plate and has a plurality of protrusions 31 and a plurality of recesses 32 in the plate. It is the same as the first embodiment of the present invention in that one fluid guide portion 30 is formed. The plate 3 has an opening 50 in which the plate is formed at both ends in the longitudinal direction, and each of the openings 50 is surrounded by the fluid guide portion 30, and in the fluid guide portion 30, the protrusion 31 and the concave portion are concave. The part 32 is different from the first embodiment of the present invention in that it is aligned along a curve extending from the outer circumference of the opening 50 to the edge of the main heat transfer part 37.

The fluid guide portion 30 formed in the longitudinal direction, that is, on both sides of the heat exchange plate 3 having a rectangular shape on each of the short sides of the plate 3, is provided with a heat exchange plate by a predetermined distance longer than the length of the opening 50. It extends in the longitudinal direction of (3), and has the area extended in the horizontal direction of a plate over the horizontal length. The protruding portion 31 and the concave portion 32 are formed on both sides of the fluid guide portion 30 in which the opening 50 is formed therebetween, and are symmetrical with respect to the center of the opening 50. The protrusions 31 and the recesses 32 are aligned along a curve extending from the opening 50 to the edge of the main heat transfer 37.

Each protrusion 31 includes a top portion 31a formed in the form of a circular flat portion, and an outer circumferential surface having a curved shape so as to extend continuously from the top portion 21a and widen toward the lower side. In the same manner as in the first embodiment of the present invention. However, the protrusions 31 of the third embodiment of the present invention are aligned along a curve extending from the edge of the opening 50 to the edge of the main heat transfer portion 37 so that the protrusions 31 are separated from each other. It is different from the protrusion 11 of the first embodiment of the present invention.

Each concave portion 32 is curved in shape so that the protrusions 31 are aligned along the curve in the fluid guide portion 30 so as to extend continuously from the outer circumferential surface of the bottom portion 32a and the surrounding protrusions 31. It includes an inner circumferential surface having a. The recess 32 is formed on the surface of the plate so as to recess in a direction opposite to the projecting direction of the protrusion 31. The recess 32 is aligned along a curve extending from the edge of the opening 50 to the edge of the main heat transfer portion 37 in the same manner as the protrusion 31, but the recess 32 is different from the protrusion 31. It is formed in different irregular patterns.

The protrusions 31 and the recesses 32 are aligned to form respective successive cross sections along the curve. The transition curved portions 33 and 34 have a central position between two adjacent protrusions 31 and two adjacent recesses so as to flexibly connect the curved surfaces of the protrusions 31 and the recesses 32. 32 is formed in the central position between them. The transition curved portion 33 for two adjacent protrusions 31 differs in shape from the transition curved portion 34 for two adjacent recesses 32. In the plate, as such, a second irregular sub-pattern is formed having a smoothly continuous curved surface over the fluid guide 30 including the area between the protrusions 31 and the recesses 32. . Therefore, the force applied to the plate can be dispersed, the strength can be improved to cope with the high pressure of the fluid, and the formability of the plate is improved.

In such a fluid guide portion 30, the concave portion 32 forms the same shape as the protrusion portion 31 on the other side (that is, the lower surface) of the plate, and forms the protrusion portion 31 on the other side, The protrusion part 31 forms the same shape as the recessed part 32 in the surface of a plate, and forms the recessed part 32 in the said other surface. However, the aligned protrusions 31 and the aligned recesses 32 do not have regularity in common with each other, and both sides of the plate are inverted, so that both sides of the plate have the first and second aspects of the present invention. The same second irregular sub-pattern is not formed in the same manner as in the second embodiment.

The heat exchange plate 3 described above, similarly to the first embodiment of the present invention, faces the same surfaces as other heat exchange plates having the same structure, and is the top of the protrusion 31 of the front plate in the fluid introduction portion 30. 31a is in contact with the top 31a of the projection 31 of the rear plate, and the top of the projection (not shown) of the front plate that forms the first irregular sub-pattern in the main heat transfer 36 Positioned on another heat exchanger plate having the same structure so as to be in contact with the corresponding top of the protrusion of the plate of the plate of the plate, and then the joining unit so formed is different in the same manner as the first embodiment of the present invention. It is coupled to the coupling unit to form a heat exchanger having a gap, ie a passage. The fluid guide in the gap 34 formed between two adjacent plates of the above joined plates in which the top 31a of the protrusion 31 of the plate is in contact with the top 31a of the protrusion 31 of the other plate. At 30, the corresponding outer circumferential surfaces of the protrusions 31 of these plates 3, except for the top portions 31a, which contact, face each other while maintaining a predetermined distance therebetween, and the corresponding transition curved portions 33 of these plates ) Face each other while keeping a predetermined distance therebetween, and the lower corresponding recesses 32 face each other while keeping a predetermined distance therebetween. The gap formed between the corresponding outer circumferential surfaces of the protrusion 31 communicates with the gap formed between the corresponding recesses 32, so that a flow path curved in a curve in which the protrusion 31 and the recess 32 are aligned is formed. Form. Adjacent flow paths are aligned to communicate with each other and communicate with each other (see FIGS. 16-19).

In the adjacent gap 39 separated by the plate, the protrusion 35 and the recess 36 in the fluid guide 30 do not form the same second irregular sub-pattern on both sides of the plate. As a result, the flow path including the gap communicating between the protrusions 35 and the outer circumferential surfaces of the concave portion 36 and between the transition curved portions 34 is significantly different from the flow path formed in the gap 38. . In the other plate in which the gap 39 is formed, the recess 36 and the transition curved portion 34 are aligned in the vertical direction or the inclined direction, and extend linearly in the direction slightly inclined from the vertical direction or the vertical direction. To form a flow path.

Now, the operation of the heat exchanger composed of the heat exchange plate 3 according to the embodiment of the present invention will be described. In the unit in which the heat exchange plates 3 overlapping each other are assembled in parallel, the plate has an opening 50 which serves as an inlet for one of the heat exchange fluids to be introduced into the gap 38, and an outlet from which the other heat exchange fluid is discharged. It has another opening 50 which acts negatively. Further openings are also provided at the upper and lower edges of the unit to communicate with the gap 39. Another heat exchange fluid is introduced in a vertical direction from an additional opening acting as an inlet, and the other heat exchange fluid exits from another additional opening acting as an outlet so that the heat exchange fluid is in each gap between the plates based on the backflow system. Alternately flow

In the upper fluid guide 30 of each heat exchange plate 3, one of the heat exchange fluids is introduced from the opening 50 in the fluid guide 30. The other heat exchange fluid flowing in the other gap 39 located on the opposite side to the heat exchange plate 3 is discharged outward from the upper edge of the unit. In the gap 38, the protrusions 31 and the recesses 32 are aligned along a curve to form a plurality of flow paths through which one of the heat exchange fluids flows. In the gap 39 through which the other heat exchange fluid flows, a plurality of flow paths are formed, which extend linearly in the vertical or inclined direction and intersect with each other according to the arrangement of the protrusion 35 and the recess 36.

On the other hand, in the lower fluid guide portion 30, the heat exchange fluid flowing in the gap 38 is discharged from the opening 50 to the outside. Another heat exchange fluid is introduced vertically into the other gap 39 from the inlet located opposite the outlet.

The heat exchange fluid is first distributed from the opening 50 in the gap 39 to the fluid guide 30 at the introduction power of the gap 39, with a portion of the fluid directly into the main heat transfer 37 below the opening 50. But most of the remainder flows along a curve in which the protrusions 31 and the recesses 32 align, repeating the joining and branching at the intersection of the flow paths, flexibly and evenly at the edge of the main heat transfer portion 37. (See the solid arrow in FIG. 15). The heat exchange fluid reaches the edge of the main heat transfer portion 37 uniformly, causing the heat exchange fluid to flow to all regions on both sides of the main heat transfer portion 37 of the heat exchange plate 3 in this manner.

On the other hand, with respect to the discharge of the heat exchange fluid, such a fluid flowing vertically with uniform distribution flows into the fluid guide portion 30 from the edge of the main heat transfer portion 26, and a part of the fluid is below the main heat transfer portion 37. Although it flows directly to the opening 50 located at the upper part, the remaining part flows along the curve in which the protrusion part 31 and the concave part 32 align, repeating joining and branching at the intersection part of a flow path, and opening 50 Leads to More specifically, the heat exchange fluid flows through the curved flow path and flexibly reaches the opening 50 serving as the outlet. Therefore, the heat exchange fluid is uniformly received from the edge of the main heat transfer portion 16 and flexibly discharged to avoid the problem of the adverse effect of the irregular flow of the fluid in the main heat transfer portion 37 accompanying the stagnation of the heat exchange fluid. Can be.

In another gap 39, a flow passage mainly comprising a recess 32 formed behind the protrusion 31 and a transition curved portion 33 is connected in a vertical direction or a slightly inclined direction. Thus, similarly to the first and second embodiments of the present invention, the inlet side of the gap 38 acts as the outlet side of the gap 39, and the outlet side of the gap 38 acts as the inlet side of the gap 39. The other heat exchange fluid in the gap 39 flows from the edge of the fluid guide portion 30 on the inflow side in the flow path extending in the vertical direction or the slightly inclined direction, and is flexible and uniform to the edge of the main heat transfer portion 37. To reach. The other heat exchange fluid travels from the edge of the main heat transfer portion 37 to the outlet portion and flows out through the flow passage extending in the vertical direction or the slightly inclined direction of the fluid guide portion 30 on the outlet side (FIG. See dotted line arrow in 15).

Thus, each fluid in the fluid guide 30 can be directed through the gaps 38 and 39 to the main heat transfer 37. Thus, two kinds of heat exchange fluids can be dispersed at all corners of the main heat transfer portion 37, so that heat transfer between the plate and each fluid is promoted, thereby improving heat exchange performance in the same manner as in the first embodiment of the present invention. Let's do it. In addition, the overall heat exchange performance of the plate is improved by the heat exchange in the fluid guide portion 30.

According to the heat exchange plate according to the third embodiment of the present invention, the protrusions 31 and the recesses 32 in the fluid guide portion 30 have openings 50 serving as inlets and outlets for the heat exchange fluid. Depending on the structure of the plate, they are aligned along a curve extending from the opening 50 to the main heat transfer portion 37. When a plurality of plates having the above structure overlap and are combined to form an assembly unit for a heat exchanger, the gaps 38 and 39 between the plates extend along a curve in which the protrusions 31 and the recesses 32 are aligned. A flow path communicating with each other is formed. In particular, when the heat exchange fluid introduced into the gap between the plates from the opening 50 on the outlet side is introduced into the fluid guide portion 30 of the plate through the opening 50 and flows out of the fluid guide portion, The heat transfer fluid 37 may flow through the curved flow path to the main heat transfer portion 37 such that the heat exchange fluid includes a portion of the main heat transfer portion 37 that is remote from the fluid guide 30 and away from the opening 50. You can evenly flow to all corners of the). Therefore, it is possible to promote proper heat transfer between the plate and the heat exchange fluid, thereby improving heat exchange performance. The inlet and / or outlet for the other heat exchange fluid is formed in a predetermined area at the edge of the plate, and at least a part of the protrusion 31 formed based on the curved arrangement may have the inlet and / or outlet being the main heat transfer part ( A straight array is formed in the vicinity of the straight line connecting 37). As a result, the corresponding concave portions 36 formed behind the protrusions 31 on the second side of the plate are linearly aligned to form the main part of the flow path on the second side of the plate. Thus, the fluid flowing through the opening on the first face of the plate is allowed to flow properly between the opening and the main heat transfer portion 37 and at the same time, other fluid flowing along the second face of the plate at the edge of the plate. Flexible flow between inlet and / or outlet and main heat transfer 37 allows heat transfer between heat transfer fluids through plates with first and second surfaces, thereby improving heat exchange performance between the fluids .

In the heat exchange plate according to the third embodiment of the present invention, the protrusions 31 and the recesses 32 are aligned along a curve in consideration of the positions of the openings 50 serving as inlets and outlets for the heat exchange fluid. It has a structure. The present invention is not limited to such embodiment. Even when the inlet and outlet for the heat exchange fluid are formed in the form of openings, the protrusions 31 and the recesses 32 can be linearly aligned. Also, even when the inlet and outlet for the heat exchange fluid are formed at the edge of the plate, the protrusions 31 and the recesses 32 can be aligned along a curve. The structure may be appropriately selected to adopt a positional relationship between the inlet and outlet for the heat exchange fluid and the main heat transfer portion to provide an optimum flow state of the heat exchange fluid.

In the heat exchange plate according to each of the first to third embodiments of the present invention, any preferable structure except that the fluid guide portion is formed in accordance with the position and characteristics of the inlet and outlet for the heat exchange fluid and the main heat transfer portion Can be applied. The heat exchange plate of the present invention may have a periphery and an opening of a desired shape formed at a desired position, so that the periphery of the plate is welded or brazed, or the diffusion plate is joined at a connecting portion including the top of the protrusion of the plate, thereby providing a plurality of As a heat exchanger of a plate type heat exchanger in which a heat exchanger in which two plates are directly connected or a plurality of plates are overlapped with each other and a coupling unit is formed through a pressing process for imparting an external pressure while a gasket is installed between the plates is provided. Can be used.

According to the heat exchange plate of the present invention, heat exchange fluid flowing on both surfaces of the plate is distributed to all corners of the plate, thereby maximizing heat transfer performance to the heat exchange fluid.

Claims (6)

Heat exchange plate, Formed of a metal plate having a predetermined irregular pattern, A heat exchange plate to be superimposed on one another and to be combined with one or more other heat exchange plates having the same structure to form a heat exchanger in which heat exchange occurs between heat exchange fluids in contact with both sides of the heat exchange plate, (i) a main heat transfer portion serving as a central portion with a first irregular sub-pattern for forming a portion of said predetermined irregular pattern, and (ii) having a second sub-pattern that is different from the first irregular sub-pattern and forms the remainder of the predetermined irregular pattern, the heat exchanger with the edge of the other plate combined with the heat exchanger plate to constitute the heat exchanger; At least one fluid guide which forms at least one of an inlet and an outlet for the fluid and is disposed at a predetermined position over a predetermined region near the edge of the plate Including, Wherein the second irregular sub-pattern of the fluid guide portion is concave in a direction opposite to the direction of protrusion of the plurality of protrusions formed in a predetermined alignment with the first surface of the plate, and the protrusions; Including a plurality of recesses each positioned at an intermediate position between the protrusions, Each of the protrusions includes a top having a substantially flat portion of a predetermined size, and an outer circumferential surface having a substantially conical or curved surface, wherein each of the protrusions has a portion of the other protrusion in which one of the protrusions is positioned at a predetermined interval. Are arranged in a straight line or curve, so as to be surrounded by Each of the recesses includes a bottom having a substantially flat flat surface of a predetermined size and an inner circumferential surface having a curved surface that is continuously connected to an outer circumferential surface of each of the protrusions surrounding the recess, wherein the recess is aligned with the alignment line of the protrusion. Aligned parallel or straight, or curved, At least a part of the plurality of straight lines or curves on which the protrusion and the concave are aligned on the fluid guide may include one end positioned at a predetermined position of the edge of the plate forming at least one of the inlet and outlet, And the other end, which does not coincide with the one end and is located on a boundary between the fluid guide and the main heat transfer portion. Heat exchange plate, characterized in that. The method of claim 1, The plate has a square or rectangular shape, At least one of the inlet and the outlet for the heat exchange fluid is formed at part or the entire length of at least one of the edges of the plate, The protrusions and the recesses of the fluid guide are linearly aligned in a direction parallel or perpendicular to the edge of the plate. Heat exchange plate, characterized in that. The method of claim 2, The protrusions are arranged at predetermined equal intervals based on the matrix arrangement in two directions parallel or perpendicular to the edges of the plate and orthogonal to each other, each recess being a minimum square region formed by the four protrusions Disposed in the center of the to form a matrix arrangement similar to the matrix arrangement of the protrusions, Wherein the protrusion and the concave portion form a substantially sinusoidal waveform in a cross section of the plate in an alignment direction in which the protrusion and the concave portion are aligned at predetermined intervals for a matrix arrangement, An intermediate portion between the protrusions adjacent on the first surface of the plate, and an intermediate portion between the recesses adjacent on the second surface of the plate, a bottom portion of the recess and a top portion of the protrusion in the protrusion direction of the protrusion. Located in between Heat exchange plate, characterized in that. The method of claim 1, At least one of the inlet and the outlet for the heat exchange fluid is formed in the form of an opening formed on the plate with respect to the at least one heat exchange fluid, The protrusions and the recesses in the fluid guide are aligned based on a curved arrangement from the outer edge of the opening to the boundary between the fluid guide and the main heat transfer portion, and then to the outer edge of the opening. Gradually curved in a direction perpendicular to the boundary line between the fluid guide portion and the main heat transfer portion from a direction perpendicular to the Heat exchange plate, characterized in that. The method of claim 4, wherein The plate has a square or rectangular shape, At least one of the inlet and the outlet for the heat exchange fluid is in the form of an opening formed on the plate for one heat exchange fluid, and for part of at least one of the edges of the plate for another heat exchange fluid or Formed over its entire length, At least a part of the protruding portion of the fluid guide portion is disposed near the line connecting the predetermined position of the edge of the plate to the boundary line between the fluid guide portion and the main heat transfer portion, based on the curved arrangement, and is linear Arranged in a linear arrangement of the protrusions, in which a recess is not disposed. Heat exchange plate, characterized in that. The method according to any one of claims 1 to 5, Each of the protrusions of the second irregular sub-pattern of the fluid guide portion projecting from the first surface of the plate corresponds to the recess formed in the first surface of the plate from the second surface of the plate. Each of the recesses of the second irregular sub-pattern of the fluid guide portion having the same shape as the corresponding projecting protrusion protruding from the first surface of the plate is formed in the protrusion formed on the first surface of the plate. And correspondingly having the same shape as the corresponding recessed portion recessed from the second side of the plate, thereby forming the same irregular sub-pattern on both sides of the plate.

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