JP2007285691A - Heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat exchanger used in a total enthalpy heat exchange type ventilation device, capable of improving mass-productivity, reducing manufacturing costs and preventing leakage of airflow. <P>SOLUTION: In this heat exchanger 1a wherein an unit element 2a is formed by integrally molding spacial ribs 6a, 6aa for keeping a space between a heat transfer plate 4 and a heat transfer plate 4, and shielding ribs 7a, 7aa for shielding the leakage of airflow, with a resin, the plurality of unit elements 2 are stacked to form a ventilation flue 5 between the heat transfer plates 4, and the primary airflow and the secondary airflow are circulated to the ventilation flue 5 to exchange heat through the heat transfer plates 4, shielding rib injection ports 14a and spacial rib injection ports 15 are formed on positions connected to the spacial ribs 6a, 6aa and the shielding ribs 7a, 7aa as injection ports for injecting a molten resin. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a heat exchanger having a laminated structure used for a total heat exchange type ventilation device such as a heat exchange type ventilation fan or a building for home use.

  Conventionally, this type of heat exchanger is a heat exchanger by laminating heat transfer plates and spacers without joining them, in order to improve the basic functions such as ventilation resistance and heat exchange efficiency and to suppress the manufacturing cost. Some of them are formed (see, for example, Patent Document 1).

  Hereinafter, the heat exchanger will be described with reference to FIGS. 21 (a), 21 (b), and 22.

  As shown in the figure, the spacer 101 made of synthetic resin is provided on the interval rib 103 that holds the interval between the heat transfer plates 102, the connecting rib 104 that connects the interval ribs 103, and the interval rib 103 and the connecting rib 104. The protrusions 106 and the recesses 107 that are fitted to each other are obtained by integrally molding the small protrusions 105 arranged on the opposing surfaces of the vertically stacked spacers. The heat transfer plate 102 having only heat transfer and moisture permeability or heat transfer is provided with an alignment hole 108. The alignment hole 108 is to be fitted to the small protrusion 105 when the spacer 101 and the heat transfer plate 102 are laminated.

  The heat exchanger 109 is obtained by stacking the spacers 101 while being alternately shifted by 90 degrees and interposing the heat transfer plate 102 between the spacers 101. The heat exchanger 109 connects and holds the spacers 101 while the convex portions 106 and the concave portions 107 provided at the four corners of the spacer 101 are fitted.

In the above configuration, when the primary airflow A and the secondary airflow B are circulated, heat exchange is performed between the primary airflow A and the secondary airflow B via the heat transfer plate 102.
Japanese Patent No. 3023546

  Since such a conventional heat exchanger 109 is formed by laminating the spacer 101 and the heat transfer plate 102 without joining, there is a problem in that airflow leakage increases due to a decrease in sealing performance caused by misalignment of the lamination. Therefore, it is required to prevent airflow leakage due to a decrease in hermeticity due to stacking deviation.

  In addition, the spacer 101 is formed from a synthetic resin using a molding means such as injection molding. However, when burrs are generated at the injection port into which the molten resin is injected, the adjacent spacers 101 are adjacent to each other when the spacers 101 are stacked. There is a problem that a gap is formed between the spacer 101 and the heat transfer plate 4 or the adjacent spacer 101 due to interference, and there is a problem that airflow leakage increases due to a decrease in sealing performance, and the gap between unit elements caused by burrs is eliminated. It is required to prevent airflow leakage due to the above.

  Further, since the heat exchanger 109 is formed by separately using two parts of the spacer 101 made of synthetic resin and the heat transfer plate 102, the number of parts is increased and the number of processing steps is increased. There is a problem that the productivity is lowered, and it is required to reduce the manufacturing cost and improve the mass productivity.

  The spacer 101 is made of synthetic resin using a molding means such as injection molding. Since the plurality of spacing ribs 103 of the spacer 101 are connected by the connecting rib 104, the plurality of spacing ribs 103 are connected to each other. If the injection port for injection molding the molten resin is provided in a portion adjacent to the spacing rib 103, the molten resin injected from the injection port in the injection mold flows from the spacing rib 103 to the connecting rib 104, Furthermore, since it flows to the other spacing rib 103, the injection pressure for resin molding becomes high, a large molding machine is required, and the capital investment becomes high, and the manufacturing cost increases.

  Further, when an injection port for injection molding of the molten resin is provided in a portion adjacent to the connecting rib 104, the molten resin injected from the injection port in the injection mold is sequentially supplied from the connecting rib 104 to the plurality of interval ribs 103. Therefore, there is a problem that the injection pressure for resin molding is high, a large molding machine is required, capital investment is high, and manufacturing costs are high, and equipment is reduced by reducing the capacity of the resin molding machine. There is a need to reduce investment and reduce manufacturing costs.

  The present invention solves such a conventional problem, can improve mass productivity, can reduce the number of parts, can improve mass productivity by reducing processing steps, and can be manufactured. The cost can be reduced, the number of parts can be reduced, the manufacturing cost can be reduced by reducing the number of processing steps, and the equipment investment can be reduced by reducing the capacity of the resin molding machine. An object of the present invention is to provide a heat exchanger capable of reducing airflow leakage and preventing airflow leakage by eliminating gaps between unit elements caused by burrs. .

  In order to achieve the above object, the heat exchanger according to the present invention integrally forms a heat transfer plate, a spacing rib for maintaining a space between the heat transfer plate and a shielding rib for shielding airflow leakage with resin. A unit element is formed, and a plurality of unit elements are stacked to form a ventilation path between the heat transfer plates, and a primary airflow and a secondary airflow are circulated through the ventilation path, whereby the heat transfer plate is In the heat exchanger configured to exchange heat via, an inlet for injecting molten resin into a position connected to at least one of the spacing rib or the shielding rib, or at least one of the spacing rib or the shielding rib The spacing ribs and the shielding ribs are connected to each other.

  By this means, a heat exchanger can be obtained in which the number of parts is small and mass productivity can be improved by reducing the number of processing steps, and the number of parts is small and manufacturing costs can be reduced by reducing the number of processing steps. It is done.

  As another means, the injection port is provided with means for allowing the adjacent unit elements to escape when they are stacked so as not to interfere with each other.

  By this means, it is possible to obtain a heat exchanger that can prevent airflow leakage due to elimination of gaps between unit elements caused by burrs.

  The other means is provided with a paragraph as at least one of the spacing rib and the shielding rib as the escape means.

  By this means, it is possible to obtain a heat exchanger that can prevent airflow leakage due to elimination of gaps between unit elements caused by burrs.

  Another means is that the paragraph is connected to at least one of the interval rib and the shielding rib and provided in the ventilation path.

  By this means, it is possible to obtain a heat exchanger that can prevent airflow leakage due to elimination of gaps between unit elements caused by burrs.

  As another means, the paragraph is connected to the shielding rib and provided outside the ventilation path.

  By this means, it is possible to obtain a heat exchanger that can prevent airflow leakage due to elimination of gaps between unit elements caused by burrs.

  Another means is that the paragraph is provided at a position where the shielding rib and the spacing rib intersect.

  By this means, a heat exchanger capable of reducing the manufacturing cost can be obtained.

  In another means, the plurality of spacing ribs are connected by any spacing rib.

  By this means, a heat exchanger capable of reducing the manufacturing cost can be obtained.

  ADVANTAGE OF THE INVENTION According to this invention, the heat exchanger with the effect that mass productivity can be improved can be provided.

  In addition, it is possible to provide a heat exchanger that has an effect of reducing the number of parts and improving the mass productivity by reducing the number of processing steps.

  In addition, it is possible to provide a heat exchanger that has an effect of reducing the manufacturing cost.

  Further, it is possible to provide a heat exchanger that has an effect that the number of parts is small and the manufacturing cost can be reduced by reducing the number of processing steps.

  Further, by reducing the capacity of the resin molding machine, it is possible to provide a heat exchanger that has the effect of reducing capital investment and reducing manufacturing costs.

  Moreover, the heat exchanger with the effect that the leakage of an airflow can be prevented can be provided.

  In addition, it is possible to provide a heat exchanger that can prevent airflow leakage due to elimination of the gap between the unit elements caused by burrs.

  According to a first aspect of the present invention, a unit element is formed by integrally molding a heat transfer plate, a spacing rib for maintaining a space between the heat transfer plate, and a shielding rib for shielding airflow leakage with resin. By forming a plurality of unit elements, a ventilation path is formed between the heat transfer plates, and a primary airflow and a secondary airflow are circulated through the ventilation path to exchange heat through the heat transfer plate. In the heat exchanger, an injection port for injecting molten resin is provided at a position connected to at least one of the interval rib or the shielding rib, or at least one of the interval rib or the shielding rib, and the interval The ribs and the shielding ribs are connected to each other, and the interval ribs and the shielding ribs of the unit elements are connected to each other and are made of resin. Therefore, at least one of the interval ribs and the shielding ribs is used. Alternatively, by injecting molten resin from an injection port at a position connected to at least one of the spacing rib and the shielding rib, unit elements having the spacing rib and the shielding rib can be integrally formed by a single resin molding, and mass production is possible. Furthermore, when insert injection molding is used in which the heat transfer plate is inserted into the mold and then injection molding is used, the heat transfer plate, the spacing rib, and the shielding rib are integrally formed in a single molding. By forming an element, the number of processing steps can be reduced, the mass productivity can be further improved, the number of parts can be reduced, and the manufacturing cost can be reduced.

  Further, in the invention according to claim 2 of the present invention, the injection port is provided with means for allowing the adjacent unit elements to escape when the unit elements are stacked, and the injection port stacks the unit elements. When the unit elements are stacked, even if burrs are generated at the injection port of the unit elements through which the molten resin is injected from the mold, the adjacent unit elements do not interfere with each other. The unit elements adjacent to each other do not interfere with each other by escaping burrs by means of escaping, so that the unit elements can be stacked without gaps, and airflow leakage can be prevented.

  In the invention according to claim 3 of the present invention, as a means for escaping, at least one of the interval rib or the shielding rib is provided with a paragraph, and the injection port is provided in at least one of the interval rib or the shielding rib. By providing a paragraph, even if burrs are generated at the injection port of the unit element into which the molten resin is injected from the mold, adjacent unit elements when the unit elements are stacked are separated from each other. The unit elements can be stacked without gaps without interfering with the escape, and airflow leakage can be prevented.

  In the invention according to claim 4 of the present invention, the paragraph is connected to at least one of the spacing rib or the shielding rib and provided in the ventilation path, and the inlet is formed of the spacing rib or the shielding rib. Even if burrs are generated at the injection port of the unit element through which the molten resin is injected from the mold by connecting to at least one and providing a paragraph in the ventilation path, when the unit elements are stacked, Adjacent unit elements do not interfere with each other by escaping burrs by paragraphing, and further, since the burrs are located in the ventilation path, they do not interfere further by escaping burrs with the ventilation path space with adjacent unit elements, Unit elements can be stacked without a gap, and airflow leakage can be prevented.

  In the invention according to claim 5 of the present invention, the paragraph is connected to the shielding rib and provided outside the ventilation path, and the inlet is connected to the shielding rib and outside the ventilation path. By providing, even if burrs should occur at the injection port of the unit element into which the molten resin is injected from the mold, adjacent unit elements when the unit elements are stacked are separated to escape the burrs. Since the burr is located outside the ventilation path without interfering, the space between the adjacent unit elements can be increased, and the unit elements can be stacked without gaps without interfering with the escape of the burr. Leakage can be prevented.

  Further, according to the sixth aspect of the present invention, as the paragraph, the injection port is disposed at the position where the shielding rib and the spacing rib intersect by providing the shielding rib and the spacing rib at the intersecting position. Therefore, since the molten resin injected from the injection port in the mold flows simultaneously to the shielding rib and the spacing rib that form the unit element with resin, the resin moldability is good. In addition, since the thickness (volume) of the resin in the unit element is large at the position where the shielding rib and the spacing rib intersect, the injection pressure for resin molding can be lowered by providing an injection port at this position, and the resin molding Since the capacity of the machine can be reduced, the equipment investment can be reduced, so that the manufacturing cost can be reduced.

  Further, in the invention according to claim 7 of the present invention, the plurality of spacing ribs are connected by any spacing rib, so that the molten resin injected from the injection port in the mold is made of resin as a unit element. In addition to flowing simultaneously to the shielding ribs and the spacing ribs to be formed, the spacing ribs are connected by any one, so the molten resin that has flowed into the spacing ribs branches and flows from the portion where the spacing ribs are connected to each other Since the resin moldability is good, the injection pressure for resin molding can be lowered, and the capacity of the resin molding machine can be reduced, so that the capital investment can be reduced and the manufacturing cost can be reduced. it can.

(Embodiment 1)
1 is a schematic perspective view of a heat exchanger, FIG. 2A is a schematic perspective view of a unit element viewed from the X direction, FIG. 2B is a schematic perspective view of a unit element viewed from the Y direction, and FIG. 4 is a schematic exploded perspective view of the heat exchanger, FIG. 4A is a schematic perspective view of a heat exchanger in which unit elements are correctly stacked, and FIG. 4B is a schematic perspective view of a heat exchanger taken along the line AA. FIG. 5C is a schematic enlarged perspective view of a heat exchanger having an AA cross section, FIG. 5A is a schematic perspective view of a heat exchanger in which unit elements are mistakenly stacked, and FIG. 5B is a schematic enlarged perspective view of the heat exchanger. 6 (a) is a schematic perspective view of a heat exchanger in which unit elements are correctly stacked, FIG. 6 (b) is a schematic perspective view of a heat exchanger with a BB cross section, and FIG. 6 (c) is a BB cross section. FIG. 7A is a schematic perspective view of a heat exchanger in which unit elements are mistakenly stacked, and FIG. 7B is a schematic perspective view of a heat exchanger having a CC cross section. FIG. ) Is a schematic enlarged perspective view of a heat exchanger having a CC cross section, FIG. 8 is a schematic perspective view of a heat transfer plate, FIG. 9A is a schematic perspective view of a heat exchanger in which unit elements are correctly stacked, and FIG. b) is a schematic perspective view of a heat exchanger having a B-B cross section, FIG. 9c is a schematic enlarged perspective view of a heat exchanger having a B-B cross section, and FIG. 10A is a heat exchanger in which unit elements are mistakenly stacked. FIG. 10B is a schematic perspective view of a heat exchanger having a CC cross section, FIG. 10C is a schematic enlarged perspective view of a heat exchanger having a CC cross section, and FIG. FIG. 12 is a schematic sectional view of an injection mold, FIG. 13 (a) is a schematic perspective view of a heat exchanger in which unit elements are correctly stacked, and FIG. 13 (b) is a heat exchange of a BB cross section. FIG. 13C is a schematic enlarged perspective view of a heat exchanger having a BB cross section.

  1, 2 (a), 2 (b), 3, 4 (a), 4 (b), and 4 (c), the heat exchanger 1 a has a square shape with a side of 120 mm and a thickness. The 2.5 mm unit elements 2a are alternately stacked while being rotated 90 degrees, and the unit elements 2a are bound together by the support rod 3, and the ventilation path 5 formed between the heat transfer plates 4 When the primary airflow A and the secondary airflow B are circulated, the primary airflow A and the secondary airflow B exchange heat while being orthogonal to each other via the heat transfer plate 4.

  2A and 2B, the unit element 2a includes a spacing rib 6a, a shielding rib 7a, a shielding rib concave portion 8, a through hole 9, a through hole convex portion 10, and a laminated layer on the surface of the heat transfer plate 4 in the X direction. A confirmation convex portion 11, a positioning convex portion 12, a positioning through hole 13a, a shielding rib injection port 14a, a spacing rib injection port 15, and a spacing rib 6aa, a shielding rib 7aa, a through hole 9, Positioning through-hole 13aa, shielding rib convex part 16, through-hole concave part 17, stacking confirmation concave part 18 and positioning flat part 19 are provided, and spacing ribs 6a, 6aa and shielding ribs 7a, 7aa sandwich heat transfer plate 4 therebetween. , Obtained by integral molding with resin.

  On the surface of the heat transfer plate 4 in the X direction, six spacing ribs 6a are formed at a predetermined interval with a height of 1 mm and a width of 1 mm, and the shielding ribs 7a are parallel to the spacing ribs 6a at a pair of opposite ends of the heat transfer plate 4. It is 1 mm high and 5 mm wide. The shield rib recess 8 is formed on the upper surface of the shield rib 7a to have a concave height of 0.5 mm and a width of 2.5 mm along the ventilation path 5, and the cross section of the shield rib 7a and the shield rib recess 8 is stepped. It is formed. The shielding rib inlet 14 a is trapezoidal and is connected to the shielding rib 7 a, is formed in the ventilation path 5, and has the same convex height as the shielding rib recess 8. The through holes 9 are the four corners of the unit element 2 a, and holes are provided in the shielding rib 7 a, and the through hole convex portions 10 having a convex height of 0.4 mm are provided around the through holes 9. The stacking confirmation convex portion 11 is connected to the through hole convex portion 10 and provided at two diagonal positions of the square unit element 2a with a convex height of 0.4 mm. Two positioning projections 12 are provided on the upper surface of the spacing rib 6a with a projection height of 1.7 mm, and the positioning through holes 13a are provided with two cylinders with a projection height of 1.0 mm on the spacing rib 6a. Is formed in such a shape that the step of the spacing rib 6a is dropped to a concave height of 0.5 mm on the upper surface of the spacing rib 6a.

  On the surface in the Y direction of the heat transfer plate 4, the interval ribs 6 aa are orthogonal to the interval ribs 6 a, and are formed at a predetermined interval with a height of 1 mm and a width of 1 mm, and the shielding ribs 7 aa are a pair of opposite ends of the heat transfer plate 4. Thus, the height is 1 mm and the width is 5 mm in parallel with the spacing rib 6aa. The shielding rib convex portion 16 is formed on the upper surface of the shielding rib 7aa in a convex shape along the ventilation path 5 with a convex height of 0.4 mm and a width of 2.4 mm. The cross section of the shielding rib 7aa and the shielding rib convex portion 16 is a staircase. It is formed in a shape. The through holes 9 are the four corners of the unit element 2 a, and holes are provided in the shielding rib 7 aa, and a through hole concave portion 17 having a concave height of 0.5 mm is provided around the through hole 9. The stacking confirmation recesses 18 are connected to the through-hole recesses 17 and provided at two opposite corners of the rectangular unit element 2a with a recess height of 0.5 mm. The positioning flat surface portion 19 is provided with two columns having a convex height of 1.0 mm on the opposite side of the positioning convex portion 12 with the heat transfer plate 4 interposed therebetween, and the positioning through hole 13aa is located between the positioning heat transfer plate 4 and the positioning through hole 13a. Two cylinders with a convex height of 1.0 mm are provided on the opposite side.

  As shown in FIG. 4A, FIG. 4B, and FIG. 4C, the spacing rib 6a and the spacing rib 6aa are adjacent to each other when the unit elements 2a are stacked while being alternately rotated by 90 degrees. And the spacing ribs 6aa are formed so as to overlap each other, and serves to hold the heat transfer plate 4 at a constant spacing. In the present embodiment, since the convex height of the spacing rib 6a and the spacing rib 6aa is 1 mm, the heat transfer plate 4 is laminated every 2 mm.

  As shown in FIGS. 4 (a), 4 (b), and 4 (c), the shielding ribs 7a and the shielding ribs 7aa are adjacent to each other when the unit elements 2a are stacked while being alternately rotated by 90 degrees. And the shielding rib 7aa are overlapped, and the primary air flow A and the secondary air flow B flowing through the ventilation path 5 of the heat exchanger 1a are shielded so that the air flow does not leak from the end face of the heat exchanger 1a, and It has the function of holding the hot plate 4 at a constant interval.

  The shielding ribs 7a and 7aa are configured to be formed at both ends of the rectangular unit element 2a so that the heat transfer plate 4 of the heat exchanger 1a is wide within a certain volume. However, the design and mass productivity of the heat exchanger are not provided. It is determined as appropriate.

  As shown in FIGS. 4 (a), 4 (b), and 4 (c), the shielding rib recesses 8 and the shielding rib projections 16 are adjacent to each other when the unit elements 2a are properly stacked while rotating 90 degrees alternately. The concave portion of the shielding rib concave portion 8 and the convex portion of the shielding rib convex portion 16 are formed to be fitted. The heat exchanger 1a is generated when the unit elements 2a are fixed to each other by stacking the unit elements 2a by fitting the shielding ribs 7a and the shielding rib concave parts 8 provided on the shielding ribs 7aa and the shielding rib convex parts 16 together. To prevent misalignment. The airflow shielding on the side surface of the heat exchanger 1a is performed by overlapping the adjacent shielding ribs 7a and the shielding ribs 7aa as shown in FIG. The fitting of the protrusions also shields the airflow. In the present embodiment, in consideration of the manufacturing accuracy of the mold and the accuracy of resin molding, the shielding rib 7a and the shielding rib 7aa are necessarily overlapped, and the fitting of the shielding rib concave portion 8 and the shielding rib convex portion 16 is an air flow. Is provided with a stacking relief portion 20a of 0.1 mm in the height direction so as not to leak. Although the stacking relief part 20a in the height direction of 0.1 mm is provided, when the unit elements 2a are correctly stacked, it is only necessary to shield the air flow on the side surface of the heat exchanger 1a and fit the unit elements 2a to each other. It is determined appropriately according to the design and manufacturing accuracy of the exchanger.

  As shown in FIG. 5A and FIG. 5B, when the unit elements 2a are not rotated alternately by 90 degrees and are stacked by mistake, the projections of the shielding rib projections 16 interfere with the adjacent spacing ribs 6a. However, the adjacent unit elements 2a cannot be fitted to each other, and when confirmed from the side surface of the heat exchanger 1a, there is a gap between the unit elements 2a, so that it is possible to easily confirm a stacking error of the unit elements 2a. Yes.

  The shield rib recess 8 and the shield rib protrusion 16 are provided on the shield rib 7a and the shield rib 7aa of the unit element 2a. However, when the unit elements are correctly stacked, the recesses and the projections of the adjacent unit elements are fitted to each other. As long as a part of the unit element adjacent to the convex portion interferes when stacked, the same effect can be obtained even if a heat exchanger having another configuration is used.

  The interference in this specification is a state in which when the unit elements 2a are mistakenly stacked, a part of the unit elements 2a adjacent to the convex portion hits, and the adjacent unit elements 2a cannot be fitted to each other and a gap is formed. . In addition, when the unit elements 2a are correctly laminated, the concave and convex fitting structures provided in the unit elements 2a are fitted to each other, there is no airflow leakage, and the basic performance of the heat exchanger can be exhibited. Yes, if the unit elements 2a are mistakenly stacked, the convex portions provided in the unit elements 2a and a part of the unit elements 2a interfere with each other, a gap is formed between the adjacent unit elements 2a, airflow is leaked, This means that the basic performance of the exchanger cannot be demonstrated.

  As shown in FIGS. 6 (a), 6 (b), and 6 (c), the through-hole recesses 17 and the through-hole protrusions 10 are adjacent when the unit elements 2a are correctly stacked while alternately rotating 90 degrees. The concave portion of the through-hole concave portion 17 and the convex portion of the through-hole convex portion 10 are formed to be fitted. The heat exchanger 1a is a position generated when the unit elements 2a are stacked and the unit elements 2a are stacked by fitting the through-hole concave portions 17 and the through-hole convex portions 10 provided at the four corners of the unit elements 2a. Prevent misalignment. Airflow shielding at the four corners of the heat exchanger 1a is performed by overlapping the adjacent shielding ribs 7a and the shielding ribs 7aa as shown in FIG. The fitting of the protrusions also shields the airflow. In this specification, in consideration of the manufacturing accuracy of the mold and the accuracy of resin molding, the shielding rib 7a and the shielding rib 7aa are necessarily overlapped. A stacking relief portion 20b of 0.1 mm was provided in the height direction so as not to leak.

  Although the stacking relief part 20b in the height direction of 0.1 mm is provided, when the unit elements 2a are correctly stacked, it is only necessary to shield the air flow at the four corners of the heat exchanger 1a and fit the unit elements 2a to each other. It is determined appropriately according to the design and manufacturing accuracy of the exchanger.

  The through-hole concave portion 17 and the through-hole convex portion 10 are provided at the four corners of the unit element 2a of the unit element 2a. However, when the unit elements are correctly stacked, the concave and convex portions of the adjacent unit elements are fitted, As long as the structure is connected to at least one of the shielding ribs, or at least one of the spacing ribs and the shielding ribs, the same operation and effect can be obtained even if a heat exchanger having another configuration is used.

  Further, as shown in FIGS. 6A, 6B, and 6C, when the stacking confirmation concave portion 18 and the stacking confirmation convex portion 11 are correctly stacked while alternately rotating the unit elements 2a by 90 degrees. The concave portions of the adjacent stacking confirmation concave portions 18 and the convex portions of the stacking confirmation convex portions 11 are formed so as to be fitted. In the heat exchanger 1a, the unit elements 2a are fixed to each other and the unit elements 2a are stacked by fitting the stacking confirmation concave portions 18 and the stacking confirmation convex portions 11 provided at two diagonal positions of the square unit element 2a. This prevents misalignment that occurs when Airflow shielding at the four corners of the heat exchanger 1a is performed by overlapping the adjacent shielding ribs 7a and the shielding ribs 7aa as shown in FIG. The fitting of the protrusions also shields the airflow. In this specification, considering the manufacturing accuracy of the mold and the accuracy of resin molding, the shielding rib 7a and the shielding rib 7aa are always overlapped, and the fitting of the stacking confirmation concave portion 18 and the stacking confirmation convex portion 11 is caused by an air flow. A stacking relief portion 20c of 0.1 mm was provided in the height direction so as not to leak.

  Although the stacking relief portion 20c in the height direction of 0.1 mm is provided, when the unit elements 2a are correctly stacked, it is only necessary to shield the airflow at the four corners of the heat exchanger 1a and fit the unit elements 2a to each other. It is determined appropriately according to the design and manufacturing accuracy of the exchanger.

  As shown in FIG. 7A, FIG. 7B, and FIG. 7C, when the unit elements 2a are not rotated alternately by 90 degrees and are stacked incorrectly, the protrusions of the stacking confirmation protrusion 11 are adjacent to each other. The adjacent unit elements 2a cannot be fitted to each other due to interference with the shielding rib 7aa, and when confirmed from the side surface of the heat exchanger 1a, there is a gap between the unit elements 2a, and the unit element 2a can be easily checked for stacking errors. It has a configuration that can.

  Although the stacking confirmation recess 18 and the stacking confirmation protrusion 11 are provided at two diagonals of the unit element 2a, when the unit elements are correctly stacked, the recesses and the projections of the adjacent unit elements are fitted to each other and the stacking is erroneously performed. In this case, if the structure is such that a part of the unit element adjacent to the convex portion interferes, the same operation and effect can be obtained even if a heat exchanger having another configuration is used.

  The heat transfer plate 4 shown in FIG. 8 has a rectangular shape with a side of 119 mm and a thickness of 0.2 to 0.01 mm, preferably 0.1 to 0.01 mm, Japanese paper, flameproof paper, heat transfer, moisture permeability, and gas. It is composed of a specially processed paper having a shielding property, a moisture permeable film, or a resin sheet such as polyester, polystyrene, ABS, AS, PS, polyolefin PP or PE having only heat conductivity, a resin film, or the like. Four through-holes 9 are provided at the four corners of the heat transfer plate 4, two positioning holes 21 are provided on one diagonal line of the square heat transfer plate 4, and the heat transfer plate 4 is inserted into a resin mold. The unit element 2a is integrally formed using injection molding. When the heat transfer plate 4 is inserted into the resin mold, a pin for positioning and fixing the heat transfer plate 4 is provided in the resin mold, and the heat transfer plate 4 and the positioning hole 21 of the heat transfer plate 4 are used to transfer the heat transfer plate 4. The hot plate 4 is positioned.

  9 (a), 9 (b), and 9 (c), the positioning through holes 13a and 13aa are formed around the positioning hole 21 of the heat transfer plate 4, and the convex portion of the positioning convex portion 12 is formed. Is formed so that the unit elements 2a are correctly stacked while being alternately rotated by 90 degrees, so that they are fitted to the adjacent positioning through-holes 13a, 13aa, and the positioning flat portion 19 closes the holes of the adjacent positioning through-holes 13a. Formed.

  The heat exchanger 1a occurs when the unit elements 2a are fixed to each other by stacking the unit elements 2a by fitting the positioning through holes 13a, 13aa provided on the diagonal line of the unit elements 2a and the positioning projections 12 to each other. To prevent misalignment. As shown in FIG. 9C, the airflow shielding at the central portion of the heat exchanger 1a is such that the adjacent positioning flat surface portion 19 and positioning through hole 13a and the bottom surface of the positioning convex portion 12 overlap the positioning through hole 13aa. The fitting of the positioning through holes 13a and 13aa and the convex portions of the positioning convex portion 12 also shields the airflow. In this specification, in consideration of mold manufacturing accuracy and resin molding accuracy, the positioning flat surface portion 19 and the positioning through-hole 13a and the lower surface of the positioning convex portion 12 and the positioning through-hole 13aa are always overlapped, The through holes 13a, 13aa and the positioning convex portion 12 were fitted with a 0.3 mm laminated escape portion 20d in the height direction so as not to leak airflow. Although the stacking relief part 20d in the height direction of 0.3 mm is provided, when the unit elements 2a are correctly stacked, it is only necessary to shield the air flow at the center of the heat exchanger 1a and to fit the unit elements 2a, It is determined as appropriate according to the design and manufacturing accuracy of the heat exchanger.

  As shown in FIGS. 10 (a), 10 (b), and 10 (c), when the unit elements 2a are not alternately rotated by 90 degrees and are stacked incorrectly, the protrusions of the positioning protrusions 12 are adjacent to each other. Interfering with the positioning flat surface portion 19, the adjacent unit elements 2a cannot be fitted to each other, and when confirmed from the side surface of the heat exchanger 1a, there is a gap between the unit elements 2a. It has a configuration that can.

  The positioning through-holes 13a, 13aa, the positioning convex portion 12 and the positioning flat portion 19 are each provided on the diagonal of the unit element 2a. However, when the unit elements are correctly stacked, the holes and convex portions of the adjacent unit elements are not formed. Similar effects can be obtained even if heat exchangers with other configurations are used as long as they have a structure in which a part of the unit element adjacent to the convex portion interferes when they are fitted and mistakenly stacked.

  As shown in FIGS. 6C and 8, in the unit element 2a formed by integrally molding the heat transfer plate 4 and the resin, the through holes 9 of the heat transfer plate 4 are the through holes 9 of the shielding ribs 7a and 7aa. A hole penetrating the unit element 2a is formed at the same position, and the through hole convex portion 10 and the through hole concave portion 17 are formed around the hole.

  As shown in FIGS. 6 (c) and 9 (c), the through hole 9, the through hole convex portion 10 and the through hole concave portion 17 are configured to be connected to the shielding ribs 7a and 7aa, and the positioning through holes 13a and 13aa. Since the positioning convex portion 12 and the positioning flat surface portion 19 are configured to be connected to the spacing ribs 6a and 6aa, the unit element 2a having them can be formed by a single resin molding.

  The through-hole 9, the through-hole convex portion 10 and the through-hole concave portion 17 are formed at positions where they are connected to the shielding ribs 7a and 7aa, and the positioning through-holes 13a and 13aa, the positioning convex portion 12 and the positioning flat portion 19 are the spacing ribs 6a. The through holes 9, the through hole convex portions 10, the through hole concave portions 17, the positioning through holes 13a, 13aa, the positioning convex portions 12 and the positioning flat portions 19 are spaced ribs 6a, 6aa or shielded. When the unit element 2a is obtained by integrally forming the heat transfer plate 4 and the resin, provided at a position connected to at least one of the ribs 7a, 7aa, or at least one of the spacing ribs 6a, 6aa or the shielding ribs 7a, 7aa. It is sufficient if they can be integrally formed by a single resin molding, and similar effects can be obtained even if other configurations are used.

  11 and 12 show a manufacturing process and a manufacturing method of the heat exchanger 1a. The cutting step 22 cuts the heat transfer plate 4 into a predetermined size.

  In the next molding step 23, the unit element 2a is obtained by an insert injection molding method in which the heat transfer plate 4 is inserted into the injection mold 24 and the heat transfer plate 4 and the resin are integrally formed by an injection molding machine. As this resin, a thermoplastic resin is applied. As the type of resin, polyester-based, polystyrene-based ABS, AS, PS, polyolefin-based PP, PE, or the like is used. Further, a resin obtained by adding an inorganic filler of glass fiber or carbon fiber to a thermoplastic resin may be used. The addition amount of the inorganic filler is 1 to 50% by weight, more preferably 10 to 30% by weight with respect to the weight of the resin. When the inorganic filler is added to the resin, the unit element 2a of the resin molded product has strength and warpage. In addition, the shrinkable physical properties are improved, and the adhesion between the heat transfer plate 4 and the resin to be integrally molded is improved. This does not improve the adhesiveness due to the chemical bond, but improves the physical bond in which the fiber entanglement between the inorganic filler and the heat transfer plate 4 becomes strong.

  If a large amount of the inorganic filler is added relative to the weight of the resin, the strength, warpage and shrinkage properties of the resin molded product will be improved. Since the fluidity decreases, a resin molded product may not be obtained, and the amount of the inorganic filler added is appropriately determined depending on the required strength of the resin molded product, the physical properties of the resin, the specifications of the injection molding machine, and the like.

  In this molding step 23, when the molten resin is injected from the X direction of the heat transfer plate 4 into the injection mold 24, it passes through the resin flow path and the shielding rib provided on the unit element 2a from the gate portion of the mold. Since the molten resin flowing in from the inlet 14a and the spacing rib inlet 15 has a high injection pressure, the spacing rib 6a and the shielding rib 7a on the surface in the X direction of the heat transfer plate 4 are formed, and paper such as Japanese paper is used. Since the heat transfer plate 4 can be formed so as to penetrate the configured heat transfer plate 4 and be connected to the spacing rib 6aa and the shielding rib 7aa on the surface of the heat transfer plate 4Y, the heat transfer plate 4 and the spacing rib 6a can be formed by a single molding. , 6aa and the shielding ribs 7a, 7aa, the unit element 2a can be formed.

  The injection mold 24 for resin-molding the unit element 2a includes a runner-less means, and an open-gate or valve-gate hot runner is used as a runner-less means. Since the molten resin can always be kept fluidized by controlling the runner / gate portion with the heater 25, the sprue runner 26 which becomes a waste material at the time of resin molding does not come out, and the resin material cost can be reduced and the resources can be saved. Further, since only the unit element 2a of the molded product can be continuously taken out from the injection mold 24, the molding cycle can be shortened.

  The sprue in this specification refers to a conical part of the flow path of the molding material in the injection mold 24, and the runner refers to the sprue of the paths through which molten resin flows into the cavity in the injection mold 24. The part from the gate to the gate.

  Further, since the valve gate type hot runner has a gate opening / closing function, the burr cannot be formed at the shielding rib injection port 14a and the interval rib injection port 15 of the unit element 2a into which the molten resin is injected from the injection mold 24. When the 2a is stacked, the adjacent unit elements 2a do not interfere with each other by burrs, and the unit elements 2a can be stacked without any gap.

  The next laminating step 27 is a step of laminating the unit elements 2a while alternately rotating by 90 degrees, and inserting the support bars 3 into the through holes 9 provided at the four corners of the unit elements 2a.

  The next bundling step 28 is a step of obtaining the heat exchanger 1a by attaching a stopper to both ends of the support rod 3 inserted into the through hole 9 and bundling the unit elements 2a. The support rod 3 may be made of a thermoplastic resin or the like, and may be bound by melting both ends of the support rod 3 with heat and solidifying the unit elements 2a in a clamped state. The term “bundling” in the present invention means that the unit elements 2a are fixed by mechanical restraint.

  The heat exchanger 1a includes a shielding rib injection port 14a for injecting molten resin at a position connected to the spacing rib 6a and the shielding rib 7a and a spacing rib injection port 15, and any one of the spacing ribs 6a, 6aa and the shielding ribs 7a, 7aa. It is the structure connected with. Further, the shielding rib injection port 14a and the spacing rib injection port 15 are provided with means for allowing the adjacent unit elements 2a to avoid interference when the unit elements 2a are stacked, and the spacing rib 6a and the shielding rib 7a are provided as a paragraph as a means for releasing. Is provided. Further, as a paragraph, it is connected to the shielding rib 7 a and a shielding rib inlet 14 a is provided in the ventilation path 5.

  As shown in FIGS. 4 (a), 4 (b), and 4 (c), the shielding rib injection port 14a is provided with a paragraph in the ventilation path 5, so that the molten resin is injected from the mold. Even if burrs occur in the shielding rib inlet 14a, the adjacent unit elements 2a do not interfere with each other when the unit elements 2a are stacked, and the burrs do not interfere with each other in the ventilation path 5. Therefore, it is possible to stack the unit elements 2a without any gap without causing further interference by releasing the burr by the space of the ventilation path 5 between the adjacent unit elements 2a.

  As shown in FIGS. 13 (a), 13 (b), and 13 (c), when the interval rib injection port 15 provided in the interval rib 6a is correctly stacked while alternately rotating the unit elements 2a by 90 degrees, Although it overlaps with the adjacent spacing ribs 6aa, the spacing rib injection port 15 has a shape in which the spacing ribs 6a are formed on the upper surface of the spacing rib 6a with a concave height of 0.5 mm, so that molten resin is injected from the mold. Even if burrs are generated at the interval rib inlet 15, the unit elements 2a adjacent to each other when the unit elements 2a are stacked do not interfere with each other by releasing the burrs, and the unit elements 2a are stacked without any gap. be able to.

  In this specification, the term “paragraph” means that even if burrs occur at the injection port through which molten resin is injected from the mold into the unit element 2a, the adjacent unit elements 2a are stacked when the unit elements 2a are stacked. In order to avoid interference, the convex height is lowered from the surrounding resin ribs.

  The gap rib inlet 15 is provided on the upper surface of the gap rib 6a, and the shield rib inlet 14a is provided so as to be connected to the shield rib 7a. Any structure may be used as long as it is connected to at least one of the ribs 6a and the shielding ribs 7a, provided in the ventilation path 5, and laid so as to escape the burrs. Can do.

  With the above configuration, the heat exchanger 1a is provided with the shielding rib concave portion 8 and the shielding rib convex portion 16 in the shielding ribs 7a and 7aa as means for understanding a stacking error when the unit elements 2a are stacked, thereby the unit element 2a. When the layers are correctly stacked, the concave portions of the shielding rib concave portions 8 of the adjacent unit elements 2a and the convex portions of the shielding rib convex portions 16 are fitted, and when they are mistakenly stacked, the unit elements 2a adjacent to the convex portions of the shielding rib convex portions 16 are fitted. Part (interval rib 6a) interferes, so it is possible to easily check the stacking error of the unit elements 2a. By correcting the stacking error, it is possible to reduce defects in the production process and improve mass productivity. can do. In addition, it is possible to prevent the sealing performance from being lowered due to erroneous stacking of the unit elements 2a, and to prevent airflow leakage. Further, since the concave portion of the shielding rib concave portion 8 and the convex portion of the shielding rib convex portion 16 are fixed to each other by fitting the concave portion and the convex portion when the unit elements 2a are stacked, the unit elements 2a are fixed to each other. Decrease in sealing performance due to misalignment can be prevented, airflow leakage can be prevented, and the fitting structure can prevent mass misalignment that occurs when the unit elements 2a are stacked. Can be improved.

  Further, when the unit elements 2a are stacked incorrectly, the ventilation path 5 is formed in the same direction for each heat transfer plate 4, and when the primary airflow A and the secondary airflow B are circulated through the heat exchanger 1a, Not exchanged. By providing means for understanding the stacking error when the unit elements 2a are stacked, the heat exchange efficiency is reduced due to the fact that the ventilation path 5 cannot be formed correctly for each heat transfer plate 4 due to the stacking error of the unit elements 2a. Can be prevented.

  In addition, the heat exchanger 1a includes a through hole 9 in the unit element 2a, a first concave portion (1), a first convex portion (1), a through hole concave portion 17 and a through hole convex portion 10, and a second concave portion ( 2) and the second protrusion (2) are provided with the stacking confirmation recess 18 and the stacking confirmation protrusion 11, so that the first recess (1) and the first protrusion (1) are formed by stacking the unit elements 2a. When the through-hole concave portion 17 and the through-hole convex portion 10 are fitted to each other, the unit elements 2a are fixed to each other. Therefore, it is possible to prevent the sealing performance from being lowered due to the deviation of the unit elements 2a. Leakage can be prevented.

  Further, the first fitting structure provided around the through hole 9 can prevent mass misalignment that occurs when the unit elements 2a are stacked, thereby improving mass productivity. Further, when the unit elements 2a are correctly stacked, the second concave portion (2) and the second convex portion (2) are fitted with the stacking confirmation concave portions 18 and the stacking confirmation convex portions 11 of the adjacent unit elements 2a, and are erroneously stacked. Since the stacking confirmation convex portion 11 and a part of the adjacent unit element 2a (shielding rib 7aa) interfere with each other, the stacking error of the unit elements 2a can be easily confirmed, and the production process can be performed by correcting the stacking error. Defects can be reduced, and mass productivity can be improved. In addition, it is possible to prevent the sealing performance from being lowered due to erroneous stacking of the unit elements 2a, and to prevent airflow leakage. The second concave portion (2) and the second convex portion (2) are fixed to each other by uniting the lamination confirmation concave portion 18 and the lamination confirmation convex portion 11 when the unit elements 2a are laminated. Therefore, it is possible to prevent the sealing performance from being lowered due to the deviation of the unit element 2a, to prevent airflow leakage, and when the second fitting structure stacks the unit elements 2a. The mass productivity can be improved by preventing the displacement.

  Moreover, the heat exchanger 1a prevents the deterioration of the sealing performance due to the deviation of the unit elements 2a by passing the support rod 3 through the through hole 9 when the unit elements 2a are stacked and binding the unit elements 2a. And air flow leakage can be prevented.

  Further, the heat exchanger 1a is provided with the positioning hole 21 in the heat transfer plate 4, and the positioning through holes 13a and 13aa, the positioning convex portion 12, and the positioning flat surface portion 19 in the unit element 2a. When insert injection molding is used in which injection molding is performed after the plate 4 is inserted, the holes of the positioning holes 21 provided in the heat transfer plate 4 facilitate positioning when the heat transfer plate 4 is inserted into the resin mold. And mass productivity can be improved. Further, when the unit elements 2a are correctly stacked, the holes of the positioning through holes 13a and 13aa of the adjacent unit elements 2a and the convex portions of the positioning convex portions 12 are fitted, and when the unit elements 2a are erroneously stacked, adjacent to the convex portions of the positioning convex portions 12 Since a part of the unit element 2a (positioning plane part 19) interferes, it is possible to easily check the stacking error of the unit elements 2a, and it is possible to reduce defects in the production process by correcting the stacking error. , Mass productivity can be improved. In addition, it is possible to prevent the sealing performance from being lowered due to erroneous stacking of the unit elements 2a, and to prevent airflow leakage. Further, when the unit elements 2a are stacked, the through holes and the convex portions are fixed to each other by fitting the positioning through holes 13a and 13aa and the convex portions of the positioning convex portions 12 so that the unit elements 2a are fixed to each other. By preventing the deterioration of the sealing performance due to the displacement of 2a, the leakage of airflow can be prevented, and the fitting structure prevents the displacement caused when the unit elements 2a are stacked. , Mass productivity can be improved.

  Further, in the heat exchanger 1a, the interval ribs 6a, 6aa and the shielding ribs 7a, 7aa of the unit element 2a are connected by any one, so that the unit element 2a having the interval ribs 6a, 6aa and the shielding ribs 7a, 7aa is one. It can be formed integrally by one-time resin molding, which can improve mass productivity. Furthermore, when insert injection molding is used in which injection molding is performed after the heat transfer plate 4 is inserted into the mold, heat transfer can be performed by one molding. The plate 4, the spacing ribs 6a and 6aa, and the shielding ribs 7a and 7aa are integrally formed, and the unit element 2a can be formed, so that the number of processing steps can be reduced, the mass productivity can be further improved, and the number of parts is reduced. Cost can be reduced.

  Further, when the heat exchanger 1a injects molten resin from the X direction of the heat transfer plate 4 into the injection mold 24, the heat exchanger 1a passes through the resin flow path, and the shielding rib provided on the unit element 2a from the gate portion of the mold. Since the molten resin flowing in from the inlet 14a and the interval rib injection port 15 has a high injection pressure, the interval rib 6a and the shielding rib 7a on the surface in the X direction of the heat transfer plate 4 are formed, and paper such as Japanese paper The heat transfer plate 4 can be formed so as to penetrate through the heat transfer plate 4 and to be connected to the spacing rib 6aa and the shielding rib 7aa on the surface in the heat transfer plate 4Y direction. Since the unit element 2a having 6a, 6aa and the shielding ribs 7a, 7aa can be formed, the number of processing steps can be reduced, the mass productivity can be improved, the number of parts can be reduced, and the manufacturing cost can be reduced. In That. The spacing ribs 6a and shielding ribs 7a on the surface of the heat transfer plate 4X direction and the spacing ribs 6aa and shielding ribs 7aa on the surface of the heat transfer plate Y direction are integrally formed with the heat transfer plate 4 interposed therebetween when insert injection molding is performed. Therefore, a highly airtight unit element 2a can be formed, and by stacking the unit elements 2a, a heat exchanger 1a that can prevent airflow leakage is obtained.

  Moreover, since the heat exchanger 1a is connected with any one of the spacing ribs 6a and 6aa and the shielding ribs 7a and 7aa of the unit element 2a and is made of resin, the spacing ribs 6a and 6aa or the shielding ribs 7a and 7aa By providing the through hole 9 at a position connected to at least one of the spacing ribs 6a, 6aa or the shielding ribs 7a, 7aa, the spacing ribs 6a, 6aa, the shielding ribs 7a, 7aa, and the through hole 9 are formed. The unit element 2a can be integrally formed by a single resin molding, and the mass productivity can be improved.

  In addition, since the heat exchanger 1a has a rectangular unit element 2a, the heat exchanger 1a can be formed by simply laminating one unit element 2a while rotating 90 degrees, so only one mold is provided. The manufacturing cost can be reduced.

  Further, the heat exchanger 1a is provided with the through holes 9 at the four corners of the rectangular unit element 2a, so that when the unit elements 2a are mistakenly stacked, the heat exchanger 1a is adjacent to the stacking confirmation convex portion 11 provided around the through hole 9. The state in which a part of the unit element 2a (the shielding rib 7aa) interferes can be easily confirmed from the side surface of the heat exchanger 1a, and defects in the production process can be reduced by correcting the stacking error. , Mass productivity can be improved.

  Further, since the heat exchanger 1a is connected with any one of the interval ribs 6a and 6aa and the shielding ribs 7a and 7aa of the unit element 2a and is made of resin, the interval rib 6a is provided with an interval rib injection port 15; By providing the shielding rib inlet 14a at a position where it is connected to the shielding rib 7a, the heat transfer plate 4 is inserted into the injection mold 24 in the molding step 23, and the heat transfer plate 4 and the resin are injected by an injection molding machine. When the unit element 2a is molded by the insert injection molding method for integrally molding, a unit having the spacing ribs 6a and 6aa and the shielding ribs 7a and 7aa by injecting molten resin from the spacing rib injection port 15 and the shielding rib injection port 14a. The element 2a can be integrally formed by a single resin molding, and mass productivity can be improved. Further, by using the insert injection molding method, the heat transfer plate 4, the spacing ribs 6a and 6aa, and the shielding ribs 7a and 7aa are integrally formed by a single molding, and the unit element 2a can be formed, thereby reducing the number of processing steps. Further, mass productivity can be improved, the number of parts is small, and the manufacturing cost can be reduced.

  The spacing rib injection port 15 and the shielding rib injection port 14a are provided with paragraphs in the spacing rib 6a and the shielding rib 7a as means for releasing the adjacent unit elements 2a so as not to interfere when the unit elements 2a are stacked. Therefore, even if burrs are generated in the interval rib injection port 15 and the shielding rib injection port 14a of the unit element 2a into which the molten resin is injected from the injection mold 24, adjacent units when the unit elements 2a are stacked. The elements 2a do not interfere with each other by escaping burrs by means of the escaping means, and the unit elements 2a can be stacked without gaps, thereby preventing airflow leakage.

  Further, as the paragraph of the shielding rib injection port 14a, it is connected to the shielding rib 7a and provided in the ventilation path 5, so that burrs are fully generated at the injection port of the unit element 2a into which the molten resin is injected from the injection mold 24. Even if one unit element 2a is stacked, adjacent unit elements 2a do not interfere with each other by releasing burrs when the unit elements 2a are stacked. Further, since the burrs are located in the ventilation path 5, adjacent unit elements 2a It is possible to stack the unit elements 2a without any gap and to prevent the leakage of the air current by allowing the burr to escape through the space of the air passage 5 with

  Further, by providing the injection mold 24 for resin molding the unit element 2a with a means for making runnerless, no sprue runner 26 which becomes a waste material at the time of resin molding is produced, and the manufacturing cost can be reduced by reducing the resin material cost. Can also save resources.

  In addition, as a means to make runnerless, by using a hot runner, the runner gate part of the injection mold 24 is heated and controlled by the heater 25 so that it is always in a fluidized state. The runner 26 does not come out, the manufacturing cost can be reduced by reducing the resin material cost, and the resource can be saved. Further, since only the unit element 2a of the molded product can be continuously taken out from the injection mold 24, the molding cycle can be shortened and the mass productivity can be improved.

  In addition, the use of an open gate type hot runner allows the runner gate portion of the injection mold 24 to be heated and controlled by the heater 25 so that it is always in a fluidized state. In addition, the manufacturing cost can be reduced and the resource can be saved by reducing the resin material cost. Further, since only the unit element 2a of the molded product can be continuously taken out from the injection mold 24, the molding cycle can be shortened and the mass productivity can be improved.

  Further, since a valve gate type hot runner having a gate opening / closing function is used, burrs cannot be formed at the interval rib injection port 15 and the shielding rib injection port 14a of the unit element 2a into which the molten resin is injected from the injection mold 24. When the unit elements 2a are stacked, the adjacent unit elements 2a do not interfere with each other by the burr, and the unit elements 2a can be stacked without a gap, thereby preventing airflow leakage.

(Embodiment 2)
14 is a schematic perspective view of the heat exchanger, FIG. 15A is a schematic perspective view of the unit element viewed from the X direction, FIG. 15B is a schematic perspective view of the unit element viewed from the Y direction, and FIG. a) is a schematic perspective view of a heat exchanger in which unit elements are correctly stacked, FIG. 16B is a schematic perspective view of a heat exchanger having a DD section, and FIG. 16C is a heat exchanger having a DD section. 17 (a) is a schematic perspective view of a heat exchanger in which unit elements are stacked by mistake, FIG. 17 (b) is a schematic perspective view of a heat exchanger with an EE cross section, and FIG. FIG. 18 (a) is a schematic perspective view of a heat exchanger in which unit elements are correctly stacked, and FIG. 18 (b) is a schematic perspective view of a heat exchanger of FF cross section. FIG. 18 (c) is a schematic enlarged perspective view of a heat exchanger having an F-F cross section, FIG. 19 (a) is a schematic perspective view of a heat exchanger in which unit elements are mistakenly stacked, . 19 (b) schematic perspective view of a heat exchanger of cross-section G-G, FIG. 19 (c) is a schematic enlarged perspective view of a heat exchanger of cross-section G-G.

  The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. Has the same effect.

  14, FIG. 15 (a), FIG. 15 (b), FIG. 16 (a), FIG. 16 (b), and FIG. 16 (c), the heat exchanger 1b is a square having a side of 120 mm and a thickness of 2.0 mm. The unit elements 2b are stacked while being alternately rotated by 90 degrees, and the unit elements 2b are bound together by the support rod 3, and the primary airflow A is formed in the ventilation path 5 formed between the heat transfer plates 4. When the secondary airflow B is circulated, the primary airflow A and the secondary airflow B exchange heat through the heat transfer plate 4 while being orthogonal to each other.

  The unit element 2b of FIG. 15A and FIG. 15B has a spacing rib 6a, a spacing rib convex portion 29, a shielding rib 7a, a through hole 9, a through hole convex portion 10, on the X-direction surface of the heat transfer plate 4. Positioning convex part 12, positioning through hole 13a, shielding rib injection port 14b, interval rib injection port 15 are provided, interval rib 6aa, interval rib recess 30, shielding rib 7aa, through hole 9 on the Y-direction surface of heat transfer plate 4, The positioning through-hole 13aa, the through-hole concave portion 17, and the positioning flat surface portion 19 are provided, and the interval ribs 6a and 6aa and the shielding ribs 7a and 7aa are obtained by integral molding with resin so that the heat transfer plate 4 is sandwiched therebetween.

  On the surface of the heat transfer plate 4 in the X direction, six spacing ribs 6a are formed at a predetermined interval with a height of 1 mm and a width of 1 mm, and the shielding ribs 7a are parallel to the spacing ribs 6a at a pair of opposite ends of the heat transfer plate 4. It is 1 mm high and 5 mm wide. The spacing rib projections 29 are formed in a convex shape at both ends of the top surface of the spacing rib 6a with a convex height of 0.4 mm, a width of 1 mm, and a length of 15 mm. The shield rib inlet 14b is trapezoidal and is connected to the shield rib 7a, and is formed outside the ventilation path 5 with a convex height of 0.5 mm from the heat transfer plate 4. The through holes 9 are the four corners of the unit element 2b, and four holes are provided in the shielding rib 7a. The through-hole convex part 10 has a convex shape with a convex height of 0.4 mm around the hole of the through-hole 9 as a part of the four holes of the through-hole 9 at two opposite corners of the rectangular unit element 2b. Form. Two positioning projections 12 are provided on the upper surface of the spacing rib 6a with a projection height of 1.7 mm, and the positioning through holes 13a are provided with two cylinders with a projection height of 1.0 mm on the spacing rib 6a. Is formed in such a shape that the step of the spacing rib 6a is dropped to a concave height of 0.5 mm on the upper surface of the spacing rib 6a.

  On the surface in the Y direction of the heat transfer plate 4, the interval ribs 6 aa are orthogonal to the interval ribs 6 a, and are formed at a predetermined interval with a height of 1 mm and a width of 1 mm, and the shielding ribs 7 aa are a pair of opposite ends of the heat transfer plate 4. Thus, the height is 1 mm and the width is 5 mm in parallel with the spacing rib 6aa. The spacing rib recesses 30 are formed in a concave shape at both ends of the top surface of the spacing rib 6aa with a recess height of 0.5 mm, a width of 1 mm, and a length of 15.1 mm. The through holes 9 are the four corners of the unit element 2b, and four holes are provided in the shielding rib 7aa. The through-hole recess 17 is formed as a part of the four holes of the through-hole 9 and has a concave shape having a recess height of 0.5 mm around the hole of the through-hole 9 at two diagonal positions of the rectangular unit element 2b. To do. The positioning flat surface portion 19 is provided with two columns having a convex height of 1.0 mm on the opposite side of the positioning convex portion 12 with the heat transfer plate 4 interposed therebetween, and the positioning through hole 13aa is located between the positioning heat transfer plate 4 and the positioning through hole 13a. Two cylinders with a convex height of 1.0 mm are provided on the opposite side.

  As shown in FIGS. 16 (a), 16 (b), and 16 (c), the spacing rib 6a and the spacing rib 6aa are adjacent to each other when the unit elements 2a are stacked while being alternately rotated by 90 degrees. And the spacing ribs 6aa are formed so as to overlap each other, and serves to hold the heat transfer plate 4 at a constant spacing. In the present embodiment, since the convex height of the spacing rib 6a and the spacing rib 6aa is 1 mm, the heat transfer plate 4 is laminated every 2 mm.

  As shown in FIGS. 16 (a), 16 (b), and 16 (c), the spacing rib protrusion 29 and the spacing rib recess 30 are adjacent to each other when the unit elements 2b are correctly stacked while rotating 90 degrees alternately. The convex part of the spacing rib convex part 29 and the concave part of the spacing rib concave part 30 are formed to be fitted. The heat exchanger 1b is generated when the unit elements 2b are laminated and the unit elements 2b are stacked by the fitting of the interval ribs 6a and the interval rib projections 29 provided on the interval ribs 6aa and the interval rib recesses 30. To prevent misalignment. The structure of holding the heat transfer plate 4 of the heat exchanger 1b at a constant interval is performed by overlapping the adjacent interval ribs 6a and the interval ribs 6aa as shown in FIG. The fitting of the convex portion and the concave portion of the spacing rib concave portion 30 also holds the heat transfer plate 4 at a constant interval. In this specification, in consideration of mold manufacturing accuracy and resin molding accuracy, the interval rib 6a and the interval rib 6aa are necessarily overlapped, and the interval rib protrusion 29 and the interval rib recess 30 are fitted to each other in height. A stacking relief portion 20e of 0.1 mm was provided in the direction. Although the stacking relief portion 20e in the height direction of 0.1 mm is provided, it is sufficient if the heat transfer plate 4 of the heat exchanger 1b is kept at a constant interval when the unit elements 2b are correctly stacked. It is determined appropriately according to the design and manufacturing accuracy.

  As shown in FIG. 17A, FIG. 17B, and FIG. 17C, when the unit elements 2b are not rotated alternately by 90 degrees and are stacked incorrectly, the protrusions of the spacing rib protrusions 29 are adjacent to each other. The adjacent unit elements 2b cannot be fitted to each other due to interference with the shielding ribs 7aa, and when confirmed from the side surface of the heat exchanger 1b, there is a gap between the unit elements 2b, and the unit elements 2b can be easily confirmed to be stacked incorrectly. It has a configuration that can.

  The spacing rib protrusion 29 and the spacing rib recess 30 are provided in the spacing rib 6a and spacing rib 6aa of the unit element 2b. However, when the unit elements are correctly stacked, the recesses and the projections of the adjacent unit elements are fitted to each other. As long as a part of the unit element adjacent to the convex portion interferes when stacked, the same effect can be obtained even if a heat exchanger having another configuration is used.

  As shown in FIGS. 18 (a), 18 (b), and 18 (c), the through-hole concave portion 17 and the through-hole convex portion 10 are adjacent to each other when the unit elements 2b are correctly stacked while rotating 90 degrees alternately. The concave portion of the through-hole concave portion 17 and the convex portion of the through-hole convex portion 10 are formed to be fitted. In the heat exchanger 1b, the unit elements 2b are fixed to each other and the unit elements 2b are laminated by fitting the through-hole concave portions 17 and the through-hole convex portions 10 provided at two diagonal positions of the square unit element 2b. This prevents misalignment that occurs when Airflow shielding at the four corners of the heat exchanger 1b is performed by overlapping the adjacent shielding ribs 7a and shielding ribs 7aa as shown in FIG. 18 (c). The fitting of the protrusions also shields the airflow.

  In this specification, in consideration of the manufacturing accuracy of the mold and the accuracy of resin molding, the shielding rib 7a and the shielding rib 7aa are necessarily overlapped. A stacking relief portion 20 f of 0.1 mm was provided in the height direction so as not to leak. Although the stacking relief part 20f in the height direction of 0.1 mm is provided, when the unit elements 2b are stacked correctly, it is only necessary to shield the air flow at the four corners of the heat exchanger 1b and fit the unit elements 2b to each other. It is determined appropriately according to the design and manufacturing accuracy of the exchanger.

  As shown in FIGS. 19 (a), 19 (b), and 19 (c), when the unit elements 2b are not rotated alternately by 90 degrees and are stacked incorrectly, the protrusions of the through-hole protrusions 10 are adjacent to each other. The adjacent unit elements 2b cannot be fitted to each other due to interference with the shielding ribs 7aa, and when confirmed from the side surface of the heat exchanger 1b, there is a gap between the unit elements 2b, and the unit elements 2b can be easily confirmed to be stacked incorrectly. It has a configuration that can.

  The through-hole concave portion 17 and the through-hole convex portion 10 were provided at two diagonal positions of the rectangular unit element 2b as part of the four holes of the through-hole 9. For example, when the concave portion of the through-hole concave portion 17 and the convex portion of the through-hole convex portion 10 are provided at four locations of the through-hole 9, even when the unit elements 2a are mistakenly stacked, the through-hole concave portions 17 of the adjacent unit elements 2a Since the concave portion and the convex portion of the through-hole convex portion 10 are fitted and the unit element 2a cannot be mistakenly stacked, the through-hole concave portion 17 and the through-hole convex portion 10 are provided in part of the four holes of the through-hole 9. It was. In this specification, as part of the four holes of the through-hole 9, the rectangular unit element 2 b is provided at two opposite corners. The part of the hole of the through-hole 9 means that the unit elements are correctly stacked. As long as the concave and convex portions of the adjacent unit elements are fitted together and a part of the unit elements adjacent to the convex portion interferes when they are mistakenly stacked, the same applies even if a heat exchanger of other configuration is used. An effect can be obtained.

  The heat exchanger 1b is provided with a means for allowing the adjacent unit elements 2b not to interfere when the unit elements 2b are stacked. As a means for releasing, the heat exchanger 1b is connected to the shielding rib 7a, and the shielding rib inlet 14b is provided outside the ventilation path 5. It is the structure which provided the paragraph.

  As shown in FIG. 14, the shielding rib injection port 14b is provided with a paragraph outside the ventilation path 5, so that even if a burr occurs in the shielding rib injection port 14b through which molten resin is injected from the mold. When the unit elements 2b are stacked, the adjacent unit elements 2b do not interfere with each other by escaping burrs by breaking, and the burrs are located outside the ventilation path 5, so that the space between the adjacent unit elements 2b The unit element 2b can be stacked without a gap without causing further interference by releasing the burr.

  Although the shielding rib inlet 14b is provided so as to be connected to the shielding rib 7a, the inlet for injecting molten resin is connected to at least one of the shielding ribs 7a and provided outside the ventilation path 5. Any other configuration may be used as long as the burrs are escaped, and similar effects can be obtained by using other configurations.

  With the above configuration, the heat exchanger 1b is provided with the spacing rib protrusions 29 and the spacing rib recesses 30 on the spacing ribs 6a and 6aa as means for understanding the stacking error when the unit elements 2b are stacked. Are correctly stacked, the projections of the spacing rib projections 29 of the adjacent unit elements 2b and the recesses of the spacing rib recesses 30 are fitted, and when the stacking is mistaken, the unit elements 2b adjacent to the projections of the spacing rib projections 29. Part (shielding rib 7aa) interferes, so it is possible to easily check the stacking error of the unit elements 2b. By correcting the stacking error, it is possible to reduce defects in the production process and improve mass productivity. can do. In addition, it is possible to prevent the sealing performance from being lowered due to erroneous stacking of the unit elements 2b, and to prevent airflow leakage. Further, since the convex portions of the spacing rib convex portion 29 and the concave portion of the spacing rib concave portion 30 are fixed to each other by fitting the concave portion and the convex portion when the unit elements 2b are stacked, the unit elements 2b are fixed to each other. Decrease in sealing performance due to deviation can be prevented, leakage of airflow can be prevented, and the fitting structure can prevent mass misalignment that occurs when the unit elements 2b are stacked. Can be improved.

  The heat exchanger 1b includes a through-hole 9 in the unit element 2b, and a through-hole concave portion 17 and a through-hole convex portion 10 are provided at two opposite corners of the rectangular unit element 2b as a part of the through-hole 9. When the unit elements 2b are correctly stacked, the through-hole concave portions 17 and the through-hole convex portions 10 of the adjacent unit elements 2b are fitted, and when the unit elements 2b are erroneously stacked, the unit elements adjacent to the through-hole convex portions 10 are fitted. Since a part of 2b (shielding rib 7aa) interferes, it is possible to easily check the stacking error of the unit elements 2b, and by correcting the stacking error, it is possible to reduce defects in the production process, thereby increasing the mass productivity. Can be improved. In addition, it is possible to prevent the sealing performance from being lowered due to erroneous stacking of the unit elements 2b, and to prevent airflow leakage. In addition, when the unit elements 2b are stacked, the through-hole concave portion 17 and the through-hole convex portion 10 are fitted to each other so that the unit elements 2b are fixed to each other, thereby preventing deterioration in sealing performance due to deviation of the unit elements 2b. It is possible to prevent the leakage of airflow, and the mass productivity can be improved by preventing the misalignment that occurs when the fitting structure stacks the unit elements 2b.

  Further, as the paragraph of the shielding rib injection port 14b, it is connected to the shielding rib 7a and provided outside the ventilation path 5, so that burrs are generated at the injection port of the unit element 2b into which the molten resin is injected from the injection mold 24. Even if the unit elements 2b are stacked, the adjacent unit elements 2b do not interfere with each other by burring out the adjacent unit elements 2b, and further, the burrs are located outside the ventilation path 5, so that they are adjacent to each other. The space between the unit elements 2b can be increased, and the unit elements 2b can be stacked without any gap without causing further interference by escaping burrs, thereby preventing airflow leakage.

(Embodiment 3)
20A is a schematic perspective view of the unit element viewed from the X direction, FIG. 20B is a schematic perspective view of the unit element viewed from the Y direction, and FIG. 20C is a schematic enlarged view of the shielding rib injection port 14a. It is a perspective view.

  The same parts as those in the first and second embodiments are denoted by the same reference numerals, and detailed description thereof is omitted. Has the same effect.

  20 (a), 20 (b), and 20 (c) have the same shape as FIGS. 2 (a) and 2 (b), and in order to explain the position of the shielding rib injection port 14a, the unit element It is the figure except the heat-transfer plate 4 of 2a. 20A, 20B, and 20C, the shielding rib injection port 14a and the spacing rib injection port 15 of the unit element 2a do not interfere with each other when adjacent unit elements 2a are stacked. As a means for escaping, the spacing rib 6a and the shielding rib 7a are provided with paragraphs, connected as a paragraph to the shielding ribs 7a, and the shielding rib inlet 14a is provided in the ventilation path 5. The shielding rib inlet 14a is provided at two positions where the shielding rib 7a and the spacing rib 6aa intersect. The spacing ribs 6a and the spacing ribs 6aa are configured to be connected to each other, and the six spacing ribs 6a and the six spacing ribs 6aa are configured to cross and be connected so as to be orthogonal to each other.

  In the molding step 23, when the molten resin is injected into the injection mold 24 from the X direction of the unit element 2a, it passes through the resin flow path, and the shielding rib injection port 14a provided in the unit element 2a from the gate portion of the mold. In addition, the gap rib 6a and the shielding rib 7a flow from the gap rib inlet 15 and are formed so as to be connected to the gap rib 6aa and the shield rib 7aa. By providing the shielding rib injection port 14a at a position where the shielding rib 7a and the spacing rib 6aa intersect, the molten resin injected from the shielding rib injection port 14a in the injection mold 24 forms the unit element 2a with resin. The resin moldability is good because the shielding ribs 7a and 7aa and the spacing ribs 6a and 6aa flow simultaneously. Further, since the spacing rib 6a and the spacing rib 6aa are connected to each other, the molten resin that has flowed into the spacing ribs 6a and 6aa flows from the portion where the spacing rib 6a and the spacing rib 6aa are connected to flow. The resin moldability is further improved, the injection pressure for resin molding can be lowered, the capacity of the resin molding machine can be reduced, and the capital investment can be reduced, thus reducing the manufacturing cost. Can do.

  In the third embodiment, the shielding rib injection port 14a and the spacing rib injection port 15 are provided. However, the shielding rib injection port 14a is shielded even if only the shielding rib injection port 14a is configured except the spacing rib injection port 15. By providing the rib 7a and the spacing rib 6aa at the intersecting position, the molten resin injected from the shielding rib injection port 14a in the injection mold 24 in the molding step 23 is a shielding rib for forming the unit element 2a with resin. Since it flows to 7a, 7aa and the space | interval rib 6a, 6aa simultaneously, resin moldability can be made favorable.

  With the above configuration, the heat exchanger 1a is provided with the shielding rib injection port 14a provided as a paragraph at a position where the shielding rib 7a and the spacing rib 6aa intersect, so that the shielding rib injection port 14a in the injection mold 24 is provided. Since the molten resin injected from the flows simultaneously through the shielding ribs 7a and 7aa and the spacing ribs 6a and 6aa that form the unit element 2a with resin, the resin moldability is good. Further, since the thickness (volume) of the resin in the unit element 2a is large at the position where the shielding rib 7a and the spacing rib 6aa intersect, the shielding rib injection port 14a is provided at this position to lower the injection pressure for resin molding. Since the capacity of the resin molding machine can be reduced, the capital investment can be reduced, and the manufacturing cost can be reduced.

  Further, in the heat exchanger 1a, the interval rib 6a and the interval rib 6aa are connected to each other, so that the molten resin injected from the shielding rib injection port 14a in the injection mold 24 has the unit element 2a. In addition to flowing simultaneously to the shielding ribs 7a, 7aa and the spacing ribs 6a, 6aa formed of resin, since the spacing rib 6a and the spacing rib 6aa are connected by any one, the molten resin that has flowed into the spacing ribs 6a, 6aa Has a good resin moldability because it flows from the portion where the gap ribs 6a and the gap ribs 6aa are connected, so that the injection pressure for resin molding can be lowered, and the capacity of the resin molding machine can be reduced. Therefore, the capital investment can be reduced, and the manufacturing cost can be reduced.

  Further, the injection pressure for resin molding is lowered by providing the shielding rib inlet 14a at a position where the shielding rib 7a and the spacing rib 6aa intersect or by connecting the spacing rib 6a and the spacing rib 6aa. Therefore, the gate portions such as the shielding rib injection port 14a and the interval rib injection port 15 can be reduced, and an open gate type or valve gate type hot runner can be used as a means for making the injection mold 24 runnerless. Since the number of hot runners can be reduced and the capital investment can be reduced, the manufacturing cost can be reduced. In addition, since the injection pressure for resin molding can be lowered, the gate portions such as the shielding rib injection port 14a and the interval rib injection port 15 can be reduced, so that the merging portion (weld) at the time of resin molding is reduced. Therefore, the strength of the resin molded product can be increased.

  The present invention relates to a use of a heat exchanger having a laminated structure used for a heat exchange type ventilation fan for home use or a total heat exchange type ventilation device such as a building.

1 is a schematic perspective view of a heat exchanger according to Embodiment 1 of the present invention. (A) The schematic perspective view of the unit element seen from the X direction, (b) The schematic perspective view of the unit element seen from the Y direction Schematic exploded perspective view of the heat exchanger (A) The schematic perspective view of the heat exchanger which laminated | stacked the same unit element correctly, (b) The schematic perspective view of the heat exchanger of the AA cross section, (c) The schematic expansion of the heat exchanger of the AA cross section Perspective view (A) The schematic perspective view of the heat exchanger which laminated | stacked the same unit element accidentally, (b) The schematic enlarged perspective view of the heat exchanger (A) Schematic perspective view of a heat exchanger in which the same unit elements are correctly stacked, (b) Schematic perspective view of a heat exchanger in the BB cross section, (c) Schematic enlargement of the heat exchanger in the BB cross section Perspective view (A) The schematic perspective view of the heat exchanger which laminated | stacked the same unit element accidentally, (b) The schematic perspective view of the heat exchanger of the CC section, (c) The outline of the heat exchanger of the CC section Enlarged perspective view Schematic perspective view of the heat transfer plate (A) Schematic perspective view of a heat exchanger in which the same unit elements are correctly stacked, (b) Schematic perspective view of a heat exchanger in the BB cross section, (c) Schematic enlargement of the heat exchanger in the BB cross section Perspective view (A) The schematic perspective view of the heat exchanger which laminated | stacked the same unit element accidentally, (b) The schematic perspective view of the heat exchanger of the CC section, (c) The outline of the heat exchanger of the CC section Enlarged perspective view Schematic mass production process diagram of the heat exchanger Schematic cross section of the same injection mold (A) Schematic perspective view of a heat exchanger in which the same unit elements are correctly stacked, (b) Schematic perspective view of a heat exchanger in the BB cross section, (c) Schematic enlargement of the heat exchanger in the BB cross section Perspective view Schematic perspective view of a heat exchanger according to Embodiment 2 of the present invention (A) The schematic perspective view of the unit element seen from the X direction, (b) The schematic perspective view of the unit element seen from the Y direction (A) Schematic perspective view of a heat exchanger in which the same unit elements are correctly stacked, (b) Schematic perspective view of a heat exchanger with the DD cross section, (c) Schematic enlargement of the heat exchanger with the DD cross section Perspective view (A) The schematic perspective view of the heat exchanger which laminated | stacked the same unit element accidentally, (b) The schematic perspective view of the heat exchanger of the EE cross section, (c) The outline of the heat exchanger of the EE cross section Enlarged perspective view (A) Schematic perspective view of a heat exchanger in which the same unit elements are correctly stacked, (b) Schematic perspective view of a heat exchanger with the same FF cross section, (c) Schematic enlargement of the heat exchanger with the same FF cross section Perspective view (A) The schematic perspective view of the heat exchanger which laminated | stacked the same unit element accidentally, (b) The schematic perspective view of the heat exchanger of the GG cross section, (c) The outline of the heat exchanger of the GG cross section. Enlarged perspective view (A) Schematic perspective view of a unit element viewed from the X direction according to Embodiment 3 of the present invention, (b) Schematic perspective view of the unit element viewed from the Y direction, (c) Schematic of the shielding rib injection port 14a Enlarged perspective view (A) The schematic perspective view which looked at the spacer 101 of the conventional heat exchanger 109 from the X direction, (b) The schematic perspective view which looked at the spacer 101 of the conventional heat exchanger 109 from the Y direction Schematic perspective view showing a conventional heat exchanger 109

Explanation of symbols

DESCRIPTION OF SYMBOLS 1a Heat exchanger 1b Heat exchanger 2a Unit element 2b Unit element 3 Support rod 4 Heat transfer plate 5 Ventilation path 6a Spacing rib 6aa Spacing rib 7a Shielding rib 7aa Shading rib 8 Shielding rib concave part 9 Through hole 10 Through hole convex part 11 Lamination Confirmation convex part 12 Positioning convex part 13a Positioning through hole 13aa Positioning through hole 14a Shielding rib inlet 14b Shielding rib inlet 15 Interval rib inlet 16 Shielding rib convex part 17 Through hole concave part 18 Stacking confirmation concave part 19 Positioning flat part 20a Lamination relief Part 20b Lamination relief part 20c Lamination relief part 20d Lamination relief part 20e Lamination relief part 20f Lamination relief part 21 Positioning hole 22 Cutting process 23 Molding process 24 Injection mold 25 Heater 26 Sprue runner 27 Lamination process 28 Binding process 29 Spacing rib 29 Convex part 30 Spacing rib concave part

Claims (7)

A unit element is formed by integrally molding a spacing rib for maintaining a gap between the heat transfer plate and the heat transfer plate and a shielding rib for shielding airflow leakage to form a unit element, and a plurality of the unit elements are stacked. In the heat exchanger in which a ventilation path is formed between the heat transfer plates, and heat exchange is performed via the heat transfer plates by circulating a primary airflow and a secondary airflow through the ventilation path, the interval An injection port for injecting molten resin is provided at a position connected to at least one of the ribs and the shielding ribs, or at least one of the spacing ribs and the shielding ribs, and the spacing ribs and the shielding ribs are connected to each other. A heat exchanger characterized by that. 2. The heat exchanger according to claim 1, wherein the injection port includes means for allowing the adjacent unit elements to escape when the unit elements are stacked. The heat exchanger according to claim 2, wherein at least one of the interval rib and the shielding rib is provided with a paragraph as the escape means. 4. The heat exchanger according to claim 3, wherein the paragraph is connected to at least one of the interval rib and the shielding rib and provided in the ventilation path. The heat exchanger according to claim 3, wherein the paragraph is connected to the shielding rib and provided outside the ventilation path. The heat exchanger according to claim 4, wherein the paragraph is provided at a position where the shielding rib and the spacing rib intersect. The heat exchanger according to claim 6, wherein the plurality of spacing ribs are connected by any spacing rib.

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