JP2016148491A - Plate-type heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plate-type heat exchanger having excellent heat exchange performance in a heat transfer plate including a blockage part for blocking flow which short-circuits an interval between an inflow port and an outflow port.SOLUTION: A plate-type heat exchanger includes a heat exchange element polymer which mutually forms a first flow channel where a plurality of heat transfer plates having a first inflow port and a first outflow port in which a first fluid is circulated are laminated, and the first fluid is circulated between the heat transfer plates, and a second flow channel where a second fluid is circulated. The plate-type heat exchanger is such that: a second inflow port of the second fluid is provided in the first outflow port side; a second outflow port is provided in the first inflow port side; the second fluid is circulated, opposing to the flow of the first fluid between the heat transfer plates; the first inflow port and the first outflow port are provided so as to decenter from the center part of the heat transfer plates toward the second outflow port side; and a blockage part is provided between the first inflow port and the first outflow port in the first flow channel.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a plate heat exchanger, and more particularly to a plate heat exchanger in which a plurality of heat transfer plates are stacked and disposed inside a shell.

  Conventionally, a plate type that exchanges heat between fluids via a heat transfer plate by forming a flow path between stacked heat transfer plates and alternately flowing different fluids in adjacent flow paths. Heat exchangers are known.

  As such a plate-type heat exchanger, for example, the outer peripheral edges of two heat transfer plates are joined together to form a heat exchange element having a heated liquid passage inside, and between adjacent heat exchange elements A heat exchange element polymer that forms a gas flow path, and a communication portion that is provided at two locations across the gas flow path and communicates between the heated liquid flow paths of the adjacent heat exchange elements. In the heat exchanging element on one end side, an inlet and an outlet of the liquid to be heated are provided on the heat transfer plate on the opposite side to the side on which the communication portion is provided in the stacking direction. In the heated liquid flow path, the liquid is heated by obstructing the flow of the liquid to be heated which is provided across two communicating portions provided in two places and which attempts to short-circuit between the two communicating parts. A plate-type heat exchanger having a blocking portion that forms a liquid flow channel in an annular shape is known. That (see Patent Document 1).

JP 2012-122663 A

  However, in the structure of Patent Document 1, a blocking portion that forms a heated liquid passage in a ring shape is provided between two communicating portions, and the positions of the inlet and outlet on the heated liquid side are set. Although this increases the degree of freedom, a vortex is generated on the downstream side of the blocking portion during heat exchange, and there is a concern that the heat exchange performance may deteriorate.

  In addition, since the communicating portions that connect the heated liquid flow paths of the adjacent heat exchange elements are provided at two locations across the gas flow path, the gas flow paths are blocked by the communicating portions, and the one on the downstream side is provided. There was a concern that the heat exchanging performance would be deteriorated in the part or the entire surface.

  Therefore, the present invention solves such a problem, and in the heat transfer plate including a blocking portion that blocks a flow to be short-circuited between the inlet and the outlet, excellent heat exchange performance is provided. It aims at providing the plate type heat exchanger which has.

  In order to solve the above problems, a plate heat exchanger according to claim 1 of the present invention is formed by laminating a plurality of heat transfer plates having a first inlet and a first outlet through which a first fluid flows. A plate heat exchanger comprising a heat exchange element polymer that alternately forms a first flow path through which the first fluid flows and a second flow path through which the second fluid flows between the heat transfer plates. A second inlet of the second fluid is disposed on the first outlet side, a second outlet is disposed on the first inlet side, and the second fluid is disposed between the heat transfer plates. The second fluid flows in opposition to the flow, and the first inlet and the first outlet are provided so as to be eccentric from the center of the heat transfer plate toward the second outlet, A blocking portion is provided between the first inlet and the first outlet in the interior. A.

  The plate heat exchanger according to claim 2 of the present invention is the plate heat exchanger according to claim 1, wherein the heat transfer plate is configured such that the first fluid flows from the first inlet to the first heat exchanger. A plurality of guide portions projecting into the first flow path are provided so as to circulate in an annular shape toward one outlet, and any one of the guide portions is connected to the blocking portion.

  Moreover, the plate type heat exchanger according to claim 3 of the present invention is the plate type heat exchanger according to claim 1 or 2, wherein the heat transfer plate is an outer peripheral edge on the first outlet side. A guide portion projecting into the first flow path from the first portion to the vicinity of the first outlet is provided, and the opposite guide portions in the second flow path form an opening region. It is.

  The plate heat exchanger according to claim 4 of the present invention is the plate heat exchanger according to claim 2 or 3, wherein the heat exchange element polymer is disposed on the forefront. A holding plate with which the guide portion abuts is disposed in front of the heat transfer plate, and an end portion of the guide portion is disposed in the vicinity of at least one of the first inflow port and the first outflow port. An annular sealing member that seals the outer peripheral position of the communication hole to the first inlet and the first outlet provided in the pressing plate is supported from the rear side of the pressing plate at the end. Is.

  Moreover, the plate-type heat exchanger according to claim 5 of the present invention is the plate-type heat exchanger according to any one of claims 1 to 4, wherein left and right ends of the heat transfer plate The sealing part which protrudes in the said 2nd flow path is provided, and the both right-and-left both ends in the said heat exchange element polymer join the said sealing part.

  The plate heat exchanger according to claim 6 of the present invention is the plate heat exchanger according to claim 5, wherein the heat exchange element polymer is disposed inside a hollow shell. In the vicinity of the upper and lower end portions of the sealing portion, a sealing member that holds the outer peripheral edge portion of the heat exchange element polymer and presses the inner wall surface of the shell is provided.

  Moreover, the plate-type heat exchanger according to claim 7 of the present invention is the plate-type heat exchanger according to any one of claims 1 to 6, wherein the heat transfer plate is the second flow plate. An uneven channel is formed in the two channels by projecting the ridges at a predetermined interval toward the inside of the channel.

  In the plate-type heat exchanger of the present invention, the heat transfer plate including a blocking portion that blocks a flow that attempts to short-circuit between the inlet and the outlet can have excellent heat exchange performance.

It is a partial omission longitudinal cross-sectional view of the plate-type heat exchanger in the Example of this invention. It is a disassembled perspective view of the plate type heat exchanger in the Example of this invention. It is a disassembled perspective view of the heat exchange element polymer of the plate type heat exchanger in the Example of this invention. It is a front view of the heat-transfer plate of the plate type heat exchanger in the Example of this invention. It is a partially omitted sectional view inside the shell of the plate heat exchanger in the embodiment of the present invention. It is a partially omitted enlarged vertical end view of the heat exchange element polymer of the plate heat exchanger in the embodiment of the present invention. It is a partial abbreviation expansion side view of a heat exchange element polymer of a plate type heat exchanger in an example of the present invention.

  Hereinafter, a plate heat exchanger according to an embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 3, the plate heat exchanger is a plate heat exchanger in which a heat exchange element polymer 10 formed by laminating a plurality of heat transfer plates 20 is disposed in a shell 40. Of course, this will be described by way of example, but the present invention is not limited to this.

  As shown in FIGS. 1 to 3, the plate heat exchanger according to the embodiment of the present invention is, for example, a heat exchange element polymer formed by laminating a plurality of heat transfer plates 20 inside a cylindrical shell 40. 10 are accommodated. The heat exchange element polymer 10 is formed by laminating two heat-transfer plates 20 that are press-molded and arranging a plurality of heat exchange elements 11 formed by joining outer peripheral edge portions 26 in the lamination direction. It is configured by joining together. In the plate heat exchanger, the stacking direction of the heat transfer plates 20 is the front-rear direction.

  The heat exchange element polymer 10 includes a first flow path C1 formed between the heat transfer plates 20 forming the heat exchange element 11, and a second flow path C2 formed between the heat exchange elements 11. Are formed alternately, and heat exchange is performed by fluid flowing through them. The first fluid F1 flows in the first flow path C1, and the second fluid F2 flows in the second flow path C2.

  In addition, the heat exchange element polymer 10 is provided with holding plates 12 and 13 on the front side and the rear side. The front holding plate 12 is provided with a communication hole 14 communicating with the first flow path C1 at either the vertical position or the vertical position, and the rear pressing plate 13 is provided with a communication hole 14. The communication hole 14 is provided in either one of the upper and lower positions.

  Moreover, the through-hole 15 for inserting the shaft 48 mentioned later is provided in the left-right position in the holding | suppressing plates 12 and 13 in the front side and the back side. Further, a positioning plate 44 having an outer shape substantially equal to the inner diameter of the shell 40 and having a through hole 45 through which the shaft 48 is inserted is provided at the rear side of the pressing plate 13 on the rear side. desirable. Thereby, positioning of the heat exchange element polymer 10 inside the shell 40 can be easily performed.

  The shell 40 is configured to be closed with a closing lid 42 in a state in which the heat exchange element polymer 10 is accommodated in a hollow main body portion 41 having one end opened, so that internal maintenance and the like can be easily performed. It is said.

  In the closing lid 42 of the shell 40, there are two communication holes 43 in the vertical direction through which the first fluid F1 flows to the first flow path C1 formed inside the heat exchange element 11 in the heat exchange element polymer 10. Is provided. The communication hole 43 is configured to communicate with a first inflow port 21 and a first outflow port 22 of the heat transfer plate 20 described later.

  Further, on the outer wall surface of the shell 40, there are two communication holes through which the second fluid F <b> 2 circulates into the second flow path C <b> 2 formed inside the heat exchange element polymer 10. Provided. The communication holes serve as a second inlet 46 and a second outlet 47 for circulating the second fluid F2 that exchanges heat with the first fluid F1.

  The first fluid F1 is, for example, cooling water. The first fluid F1 flows from the communication hole 43 located on the lower side of the closing lid 42 through the first inlet 21 through the first flow path C1, and via the first outlet 22 located on the upper side. It flows from the communication hole 43 of the closing lid 42.

  The second fluid F2 is, for example, high temperature air or high temperature oil. The second fluid F2 flows through the second inlet 46 located on the upper side of the shell 40, flows in the shell 40 and the second flow path C2, and flows to the second outlet 47 located on the lower side. Is.

  That is, the first fluid F1 flows through the first flow path C1 in the heat exchange element polymer 10 from below to above, and the second fluid F2 moves up the second flow path C2 in the heat exchange element polymer 10. Configured to flow downward from each other and counter-current.

  As shown in FIGS. 3 and 4, the heat exchange element 11 is, for example, two sheets that are press-molded with an outer shape such that the upper and lower edges of an elliptical plate are cut by two parallel straight portions. The front and back surfaces of the heat transfer plate 20 are matched to each other, and at least the outer peripheral edge portion 26 of the two heat transfer plates 20 is joined. As shown in FIG. 1, the heat exchange element 11 forms a first flow path C <b> 1 inside, except for the outer peripheral edge portion 26, so that the heat exchange element 11 as a whole protrudes in the outer direction (front-rear direction). Each heat transfer plate 20 is molded in a state where the step is interposed.

  Further, the heat transfer plate 20 is provided with a first inflow port 21 and a first outflow port 22 through which the first fluid F1 flows, with a predetermined interval. The 1st inflow port 21 and the 1st outflow port 22 are not provided in the point-symmetrical position centering on the center part of the heat exchanger plate 20, but are the position decentered from the center part to one side of the straight part. Provided. More specifically, the first inflow port 21 is decentered toward the lower straight line portion 23 located on the lower side, the distance between the lower straight line portion 23 and the first inflow port 21 is narrowed, and the first inflow port 21 is positioned on the upper side. The interval between the upper straight portion 24 and the first outlet 22 is configured to be wide.

  The heat transfer plate 20 is provided with a blocking portion 25 at the center of the first inlet 21 and the first outlet 22 so as to protrude into the first flow path C1. The blocking portion 25 is provided in the first flow path C <b> 1 in the heat exchange element 11 so that the opposing blocking portions 25 are in contact with each other, and the first fluid F <b> 1 flows from the first inlet 21 to the first outlet 22. And prevent short circuit. Moreover, the dimension of the blocking part 25 in the left-right direction is set to be approximately equal to or shorter than the diameter dimension of the first outlet 22.

  At this time, as shown in FIG. 4, the width dimension of the heat transfer surface in the vertical direction forming the first flow path C1 excluding the outer peripheral edge portion 26 serving as a joining margin of the heat transfer plate 20 is L, and the first flow When the vertical line Y passing through the centers of the inlet 21 and the first outlet 22 and the vertical dimension from the center of the first inlet 21 to the center of the width L of the heat transfer surface is L1, L1 / L = 0 .23 to 0.35. The vertical dimension from the edge of the first inlet 21 to the edge of the first outlet 22 is L2, and the vertical dimension from the center of the blocking part 25 to the edge of the first inlet 21 is L3. At this time, L3 = L2 / 2 and L3 / L = 0.04 to 0.08.

  The heat transfer plate 20 is provided with a plurality of arcuate guide portions 27 projecting from the first inlet 21 toward the first outlet 22 into the first flow path C1. The guide portion 27 is provided in the same manner as the blocking portion 25 so that the opposing guide portions 27 are in contact with or close to each other, and the first fluid F1 that has flowed in from the first inflow port 21 is directed to the first outflow port 22. It is provided for circulation in an annular shape. The guide portion 27 is curved from the central portion direction where the first inflow port 21 and the first outflow port 22 are located toward the left and right outer directions, and each is provided with a predetermined interval. Moreover, the guide part 27 can also be formed from one circular arc, can also be formed combining several circular arcs, a straight line, etc., and is not restricted to this.

  Further, the end portion of the guide portion 27 is disposed so as to support an annular sealing member 37 that seals the outer peripheral position of the communication hole 14 formed in the pressing plate 12 from the rear side of the pressing plate 12.

  More specifically, the start end 27a of the guide portion 27 is provided at a position having a predetermined interval in the outer diameter direction from the first inflow port 21, and a line connecting the plurality of start ends 27a forms an arc, respectively. Is disposed. On the other hand, the terminal end 27b of the guide portion 27 is similarly provided at a position having a predetermined interval in the outer diameter direction from the first outlet port 22, and is arranged so that a line connecting the plurality of terminal ends 27b forms an arc. Established. As a result, a plurality of flow paths from the first inflow port 21 to the first outflow port 22 can be formed, and the flow paths can be formed in the left and right directions, respectively.

  At this time, the inlet portion 28 and the outlet portion 29 of the flow path formed by the start end 27a and the end end 27b of the guide portion 27 are formed toward the substantially central portions of the first inflow port 21 and the first outflow port 22, respectively. It is desirable that Thereby, the 1st fluid F1 can be efficiently distribute | circulated from the 1st inflow port 21 to the 1st outflow port 22. FIG.

  Further, a part of the guide part 27 is provided to be connected to both ends of the blocking part 25 in order to prevent the first fluid F1 from staying in the vicinity of the blocking part 25 and the generation of vortices. desirable. More specifically, the start end 27a of the guide portion 27 is connected to both end portions of the blocking portion 25, and the end 27b is spaced from the first outflow port 22 in the outer diameter direction and adjacent to the end. It is desirable to arrange the outlet portion 29 formed by 27b so as to face the substantially central portion of the first outlet 22.

  Further, the heat transfer plate 20 is provided with a guide portion 30 and a support portion 31 extending from the outer peripheral edge portion 26 so as to protrude into the first flow path C1. The guide portion 30 and the support portion 31 are provided so as to face each other, on the vertical line Y connecting the centers of the first inflow port 21 and the first outflow port 22, that is, in the left-right direction of the heat transfer plate 20. Provided in the center.

  The guide portion 30 is provided, for example, so as to be gradually narrowed from the outer peripheral edge portion 26 on the upper linear portion 24 side to the vicinity of the first outlet 22. Further, the distal end portion 30a of the guide portion 30 is provided at a position having a predetermined interval in the outer diameter direction from the first outlet port 22 in the same manner as the end portion 27b of the guide portion 27, and the end portions 27b of the guide portion 27 are connected to each other. They are connected so as to form an arc shape. Thereby, the exit part 29 will be formed also by the said front-end | tip part 30a and the terminal end 27b of the guide part 27 located in the uppermost side. Similarly, it is desirable that the outlet portion 29 is formed toward the substantially central portion of the first outlet 22.

  In addition, the dimension between the base portions 30b located on the outer peripheral edge portion 26 side of the guide portion 30 is substantially equal to the diameter size of the first outlet 22 or the diameter size in consideration of the flow path of the second fluid F2 described later. Set shorter. Further, the shape from the base portion 30b to the distal end portion 30a of the guide portion 30 can be formed from one arc or straight line, or can be formed by combining a plurality of arcs, straight lines, etc., and is not limited to this. Absent.

  The support portion 31 is provided, for example, in a substantially rectangular shape from the outer peripheral edge portion 26 on the lower straight portion 23 side to the vicinity of the first inflow port 21. Further, the tip of the support portion 31 is provided at a position having a predetermined interval in the outer diameter direction from the first inlet 21 in the same manner as the start end 27 a of the guide portion 27, and connects the start ends 27 a of the guide portion 27. Thus, it is arranged so as to have an arc shape. Thereby, the entrance portion 28 is also formed by the leading end portion and the start end 27a of the guide portion 27 located on the lowermost side. Similarly, it is desirable that the inlet portion 28 is formed toward the substantially central portion of the first inflow port 21.

  Further, the heat transfer plate 20 is provided with a protrusion 32 that protrudes into the second flow path C2. The protrusions 32 are provided with a predetermined interval to form an uneven flow path in the second flow path C2. The protrusion 32 is inclined with a predetermined inclination angle α with respect to the vertical line Y passing through the centers of the first inlet 21 and the first outlet 22, and the joint of the heat transfer plate 20 is formed. Except for this, it is provided on the entire heat transfer surface.

  That is, the protrusion 32 has a predetermined interval on the entire surface excluding the outer peripheral edge 26 of the heat transfer plate 20, the guide 27, the peripheral edges of the first inlet 21 and the first outlet 22, and the sealing part 34 described later. And is set to be equal to or lower than the protruding height of the sealing portion 34. In addition, the inclination angle α is preferably about 0 to 45 degrees. If the inclination angle α exceeds 45 degrees, the pressure loss in the second fluid F2 increases, which is not preferable.

  In this way, the blocking portion 25, the guide portion 27, the guide portion 30, and the support portion 31 protruding toward the first flow path C1 are joined in a state where the front and back surfaces of the two heat transfer plates 20 are matched. In doing so, since the heat transfer plates 20 are supported, the heat transfer plates 20 can be prevented from tilting. At this time, it is more desirable to appropriately provide the protrusion 33 that protrudes toward the first flow path C1 also in the substantially central portion of the heat transfer plate 20.

  The heat transfer plate 20 constitutes the heat exchange element 11 by joining at least the outer peripheral edge portion 26, the blocking portion 25, and the guide portion 30 and the support portion 31 extending from the outer peripheral edge portion 26.

  In addition, the adjacent heat exchange elements 11 join the peripheral portions of the first inlet 21 and the first outlet 22, and in the second flow path C <b> 2 at the left and right ends of the heat transfer plate 20. The heat exchange element polymer 10 is configured by joining the sealing portion 34 protruding toward the surface. The sealing portion 34 is provided in a predetermined area along the outer peripheral edge portion 26 in the left-right direction of the heat transfer plate 20.

  As shown in FIGS. 1 and 2, the heat exchange element polymer 10 configured in this way is formed by holding the pressure plates 12, 13 on the front side and the rear side of the heat exchange element 11. , 13 and the through-hole 45 provided in the positioning plate 44, the shaft 48 is inserted into and integrated with the through-hole 15 provided in the positioning plate 44. Then, in a state where the outer peripheral position of the communication hole 14 in the holding plate 12 on the front side is sealed by the annular sealing member 37, the closing lid 42 is secured by the fixing means 50 such as a screw portion and a nut provided at the end portion of the shaft 48. Is fixed to the shell 40 and closed. The annular sealing member 37 is, for example, an O-ring.

  At this time, the annular sealing member 37 disposed at the outer peripheral position of the communication hole 14 in the holding plate 12 is in the first flow path C1 of the heat transfer plate 20 disposed on the forefront of the heat exchange element polymer 10. Thus, the shield plate 25 is supported from the rear side of the pressing plate 12 by the blocking portion 25, the guide portion 30, the support portion 31, the projecting portion 33, and the start end 27 a and the end end 27 b of the guide portion 27. Thereby, the annular sealing member 37 can be disposed and closed in a stable state.

  As shown in FIGS. 2 and 5, the second fluid F <b> 2 flowing in the outer direction of the heat exchange element polymer 10 flows between the heat exchange element polymer 10 and the inner wall surface of the shell 40. A sealing member 35 that prevents a short circuit from the inlet 46 to the second outlet 47 is provided. The sealing member 35 is located in the vicinity of the upper and lower end portions of the sealing portion 34 in the heat transfer plate 20, and is continuously provided along the front-rear direction of the heat exchange element polymer 10.

  That is, a plurality of groove portions 36 formed in the vertical direction are formed in the sealing member 35 at a predetermined interval in the front-rear direction, and each outer peripheral edge portion 26 of the heat exchange element 11 is sandwiched by the groove portions 36. Each of the outer peripheral edge portions 26 can be held. Thereby, in the shell 40, the sealing member 35 presses the inner wall surface to seal the compartment, and the second fluid F2 flowing in from the second inlet 46 tends to flow outward from the sealing portion 34. The sealing member 35 can be guided into the second flow path C2, and the second inlet 46 side and the second outlet 47 side can be easily partitioned.

  As shown in FIGS. 1, 6 and 7, the plate-type heat exchanger configured as described above exchanges heat when the first fluid F1 and the second fluid F2 are circulated. Specifically, the first fluid F <b> 1 flows into the first flow path C <b> 1 from the communication hole 43 of the closing lid 42 in the shell 40 through the first inlet 21. The first fluid F1 is divided into the respective flow paths from the inlet section 28 formed by the guide section 27 in the first flow path C1, and along the guide section 27 from the lower side to the upper side of the heat transfer plate 20. And flows out from the communication hole 43 of the closing lid 42 via the first outlet 22 through the outlet 29 formed by the guide 27.

  On the other hand, the second fluid F2 flows into the shell 40 through the second inlet 46 of the shell 40 and flows into the second flow path C2 formed in the heat exchange element polymer 10. The second fluid F <b> 2 flows in the second flow path C <b> 2 from the upper side to the lower side of the heat transfer plate 20 along the protruding portion 32, and flows out from the second outlet 47 through the shell 40.

  That is, in the plate heat exchanger of the present invention, the first fluid F1 flows from the lower side of the heat transfer plate 20 to the upper side, and the second fluid F2 flows from the upper side of the heat transfer plate 20 to the lower side. The structure is such that each flow is countercurrent.

  At this time, since the heat transfer plate 20 is provided with the guide portion 27 in the first flow path C1, the first fluid F1 is circulated in an annular shape from the first inflow port 21 to the first outflow port 22 to transfer the heat. Since heat can be evenly distributed over the entire heat transfer surface of the heat plate 20, the heat exchange performance can be improved. In particular, even in the flow in the vicinity of the blocking portion 25, the blocking portion 25 and a part of the guide portions 27 are connected to each other to smoothly flow to the first outlet 22 side. It can be performed.

  Further, as shown in FIG. 5, by decentering the first inlet 21 and the first outlet 22 in the first flow path C1 to the lower side, the vicinity of the first outlet 22 through which the first fluid F1 circulates. Since the region is configured to be a wide area, heat exchange with the second fluid F2 immediately after inflow can be effectively performed.

  Further, as shown in FIG. 6, in the second flow path C <b> 2, an opening region 38 is provided between the induction portions 30 of the heat transfer plate 20, so that the second fluid F <b> 2 can be easily introduced. By decentering the first inlets 21 to be joined together and the first outlets 22 to each other downward, the blocking area of the second fluid F2 blocked by these can be reduced, and the heat exchange performance is improved. Can be made.

  In particular, since the guide portion 30 is provided on the vertical line Y connecting the centers of the first inlet 21 and the first outlet 22, that is, in the central portion in the left-right direction of the heat transfer plate 20, the first joined portion 30 is joined. Since the second fluid F2 is divided in the left-right direction of the heat transfer plate 20 by the one inflow ports 21, the heat transfer plate 20 can be evenly distributed over the entire surface, and heat exchange can be performed effectively. it can.

  Moreover, since the protrusion part 32 protrudes in the 2nd flow path C2 in the heat-transfer plate 20, in order to form an uneven | corrugated flow path in the 2nd flow path C2, 2nd fluid F2 is formed in the said flow path. Heat exchange can be performed more effectively by increasing the heat transfer surface area.

  Further, in the heat transfer plate 20, the first flow path C <b> 1 formed inside the heat exchange element 11 is raised and molded from the outer peripheral edge portion 26 through a step, so that the outer peripheral edge at the time of press molding The distortion of the flatness of the portion 26 can be prevented, and the productivity can be improved.

  As described above, according to the plate heat exchanger according to the present invention described above, excellent heat exchange performance in the heat transfer plate 20 including the blocking portion 25 that blocks the flow to be short-circuited between the inlet and the outlet. It can have.

  In the embodiment described above, the shape, size, material, and the like of the shell 40 and the heat transfer plate 20 can be changed as appropriate. For example, in the heat transfer plate 20, the first inflow port 21 and the first outflow port 22 in the first flow path C 1 are decentered upward, and the first fluid F 1 moves from the upper side of the heat transfer plate 20 to the lower side. The second fluid F2 can also flow from the lower side to the upper side of the heat transfer plate 20.

  In the heat transfer plate 20, the blocking portion 25, the guide portion 27, the guide portion 30, the support portion 31 and the sealing portion 34 are not formed by press molding. , Each may be provided.

  Moreover, if the guide part 27 in the 1st flow path C1 has sufficient heat exchange performance, and inclination is reduced by supporting in the other location at the time of joining of the heat exchanger plate 20, It can also be set as the heat exchange element 11 which does not contact the guide parts 27 which oppose.

  Moreover, the space | interval of the guide parts 27 can be made into a predetermined space | interval according to the 1st fluid F1, for example, when using it as an intercooler and an oil cooler with a marine engine, and making the 1st fluid F1 into seawater. However, it is good also as wide so that foreign materials, such as a scale, may not be stuck in the flow path which the guide part 27 forms, It is not restricted to this.

  Moreover, although the guidance | induction part 30 was provided so that it might become narrow gradually from the outer peripheral part 26 by the side of the upper linear part 24 to the vicinity of the 1st outflow port 22, it is not restricted to this. For example, it may be substantially rectangular as in the case of the support portion 31, and is particularly limited as long as the opening region 38 is formed in the second flow path C <b> 2 and the second fluid F <b> 2 can easily flow in. It is not a thing.

  Furthermore, it is needless to say that a part of the configuration can be omitted or a part of the configuration can be extracted.

DESCRIPTION OF SYMBOLS 10 Heat exchange element polymer 12 Holding plate 14 Communication hole 20 Heat-transfer plate 21 1st inflow port 22 1st outflow port 25 Blocking part 26 Outer peripheral edge part 27 Guide part 30 Guide part 32 Projection part 34 Sealing part 35 Sealing Member 37 annular sealing member 40 shell 46 second inlet 47 second outlet C1 first channel C2 second channel R1 first fluid R2 second fluid

Claims (7)

A plurality of heat transfer plates having a first inlet and a first outlet through which the first fluid flows are stacked, and a first flow path through which the first fluid flows and the second fluid flows between the heat transfer plates. A plate-type heat exchanger comprising a heat exchange element polymer that alternately forms second flow paths,
The second inlet of the second fluid is disposed on the first outlet side, the second outlet is disposed on the first inlet side, and the first fluid flows between the heat transfer plates. The second fluid flows in opposition,
The first inlet and the first outlet are provided to be eccentric from the center of the heat transfer plate toward the second outlet,
A plate heat exchanger, wherein a blocking portion is provided between the first inlet and the first outlet in the first flow path.   The heat transfer plate is provided with a plurality of guide portions projecting into the first flow path so that the first fluid flows in an annular shape from the first inflow port toward the first outflow port, The plate-type heat exchanger according to claim 1, wherein the guide portion is connected to the blocking portion.   The heat transfer plate is provided with a guide portion projecting into the first flow path from the outer peripheral edge portion on the first flow outlet side to the vicinity of the first flow outlet, and in the second flow path. The plate-type heat exchanger according to claim 1, wherein the opposing guide portions form an opening region.   The heat exchange element polymer is provided with a holding plate with which the guide portion abuts in front of the heat transfer plate provided in the forefront, and the first exchange port and the first outflow port. An end portion of the guide portion in the vicinity of at least one, and an annular sealing member that seals an outer peripheral position of the communication hole to the first inflow port and the first outflow port provided in the holding plate. The plate heat exchanger according to claim 2 or 3, wherein the end portion is supported from the rear side of the pressing plate.   The left and right ends of the heat transfer plate are provided with sealing portions protruding toward the second flow path, and the left and right ends of the heat exchange element polymer are joined to the sealing portions. The plate heat exchanger according to any one of claims 1 to 4.   The heat exchange element polymer is disposed inside a hollow shell, and holds the outer peripheral edge of the heat exchange element polymer in the vicinity of the upper and lower ends of the sealing portion, The plate-type heat exchanger according to claim 5, wherein a sealing member that presses the inner wall surface is provided.   The said heat-transfer plate forms an uneven | corrugated flow path in the said 2 flow path by the protrusion part protruding with a predetermined space | interval toward the said 2nd flow path. The plate heat exchanger according to any one of 6.

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