Heat exchange element and manufacturing method therefor, heat exchange unit, humidifying core and air treatment apparatus

Abstract

Provided are a heat exchange element capable of suppressing breakage of ribs and reducing delamination between a heat exchange fin and a framework, a manufacturing method therefor, a heat exchange unit, a humidifying core and an air treatment apparatus. The heat exchange element comprises a heat exchange fin and an injection-molded framework, wherein the framework is arranged on a surface of one side of the heat exchange fin, and the framework comprises: a frame; a separation rib extending in a first direction in the frame and separating adjacent fluid channels; and a reinforcing rib which extends in a second direction intersecting the first direction in the frame, is connected to the separation rib, and has a main reinforcing rib in the middle of the framework and at least two auxiliary reinforcing ribs, wherein the at least two auxiliary reinforcing ribs include an auxiliary reinforcing rib on one side of the main reinforcing rib and an auxiliary reinforcing rib on the other side of the main reinforcing rib, N second gate marks are formed and arranged in the second direction on the auxiliary reinforcing rib on one side and the auxiliary reinforcing rib on the other side, and the second gate marks at two ends of the auxiliary reinforcing rib on one side are centrally symmetric with the second gate marks at two ends of the auxiliary reinforcing rib on the other side about the center of the framework.

Description

Heat exchange element, method for manufacturing the same, heat exchange unit, humidifying core, and air handling device

[0001] The present application relates to a heat exchange element, a method for manufacturing the same, a heat exchange unit, a humidifying core, and an air handling device.

[0002] A heat exchange element is known as a core for a heat exchange unit that exchanges heat and moisture between air discharged to the outside and air introduced into a room, and includes a heat exchange sheet and a frame provided on one side surface of the heat exchange sheet to support the heat exchange sheet, the frame having partitioning ribs that partition air flow passages, the air flow passages being conducted in directions crossing each other in adjacent layers by stacking the heat exchange elements. In the conventional heat exchange element, in order to ensure heat exchange efficiency, the ribs on the frame are usually made thin, which causes some of the ribs to be broken during molding, and thus causes peeling between the heat exchange sheet and the frame, which affects the heat exchange performance of the core.

[0003] The present application has been achieved in view of the above problems, and aims to provide a heat exchange element, a method for manufacturing the same, a heat exchange unit, and an air handling device that can suppress breaking of ribs and peeling between a heat exchange sheet and a frame.

[0004] To achieve the above object, a first aspect of the present application provides a heat exchange element including a heat exchange sheet and a frame that is injection molded and provided on one side surface of the heat exchange sheet, the frame including a frame edge, partitioning ribs that extend in a first direction within the frame edge and partition adjacent fluid passages, and reinforcing ribs that extend in a second direction crossing the first direction within the frame edge and are connected to the partitioning ribs, the reinforcing ribs having a main reinforcing rib located at a central position of the frame and at least two auxiliary reinforcing ribs including a one-side auxiliary reinforcing rib and another-side auxiliary reinforcing rib located on both sides of the main reinforcing rib, N second gate marks being arranged on the one-side auxiliary reinforcing rib and the another-side auxiliary reinforcing rib in the second direction, respectively, the second gate marks at both ends of the one-side auxiliary reinforcing rib being centrally symmetric with respect to the second gate marks at both ends of the another-side auxiliary reinforcing rib about a center of the frame.

[0005] The heat exchange element according to the present application, the main reinforcing rib is located at the middle of the frame, the at least two auxiliary reinforcing ribs include a side auxiliary reinforcing rib and another side auxiliary reinforcing rib located on both sides of the main reinforcing rib, N second gate marks are arranged on the side auxiliary reinforcing rib and the other side auxiliary reinforcing rib respectively along the second direction, the second gate marks at the two ends of the side auxiliary reinforcing rib are centrally symmetric to the second gate marks at the two ends of the other side auxiliary reinforcing rib about the center of the frame, which helps to uniformly distribute the injection material (injection material), and the thin rib can also be fully injected, so as to inhibit or avoid the rib from being disconnected, reduce the peeling of the heat exchange sheet from the frame, and improve the heat exchange efficiency of the core (heat exchange unit). In addition, the risk of the heat exchange sheet being cut by the disconnected rib can also be inhibited or avoided.

[0006] For example, the width of the partition rib is less than 1.2 mm.

[0007] In addition, in the heat exchange element according to the present application, the line connecting the nth second gate mark on the side auxiliary reinforcing rib from one side of the second direction and the nth second gate mark on the other side auxiliary reinforcing rib from the other side of the second direction passes through the center of the frame, where N is greater than 2, n is greater than 1 and less than N.

[0008] Preferably, in the thickness direction of the heat exchange sheet, the thickness of the reinforcing rib is less than the thickness of the partition rib. Thus, when forming the gate mark on the reinforcing rib, the burr on the gate mark can be avoided from touching the heat exchange sheet, thereby causing damage to the heat exchange sheet.

[0009] In addition, in the heat exchange element according to the present application, the frame and the heat exchange sheet can be integrally formed by injection molding. Thus, the processing process is simple, and the compliance rate of the heat exchange element is high.

[0010] In addition, in the heat exchange element according to the present application, the partition ribs are spaced apart in the second direction, the main reinforcing rib is continuously formed or intermittently formed in the second direction, and adjacent partition ribs are connected to each other, and the auxiliary reinforcing rib is continuously formed or intermittently formed in the second direction, and adjacent partition ribs are connected to each other. In the case of continuous arrangement of the reinforcing rib, the strength of the heat exchange element can be improved; in the case of intermittent arrangement of the reinforcing rib, the reinforcing rib can be arranged only at the necessary position, so as to ensure the strength of the heat exchange element, and reduce the wind resistance and improve the heat exchange efficiency of the heat exchange sheet.

[0011] In addition, in the heat exchange element according to the present application, when the width of the reinforcing rib in the first direction is d, the following relationship is satisfied: d≤5 mm, so as to avoid that the reinforcing rib is too thick to block the airflow and has high pressure loss.

[0012] In addition, in the heat exchange element of the present application, the first gate mark can also be arranged on the main reinforcing rib. Thus, the material injection can be further ensured, and the frame can be prevented from being disconnected due to insufficient material injection, so as to prevent the heat exchange sheet from being separated from the frame.

[0013] In addition, in the heat exchange element of the present application, the third gate mark can also be arranged on the frame. Thus, the material injection of the frame can be further uniformly distributed.

[0014] In addition, in the heat exchange element of the present application, the one side auxiliary reinforcing rib and the other side auxiliary reinforcing rib can be arranged in multiple. Thus, the strength of the heat exchange element can be increased.

[0015] In addition, in the heat exchange element of the present application, the at least two auxiliary reinforcing ribs have a connecting portion connecting the partition rib and the frame, and the second gate mark is arranged on the connecting portion. Thus, the material injection of the frame as a whole including the frame, the partition rib and the reinforcing rib can be further uniformly distributed.

[0016] The second aspect of the present application provides a heat exchange unit including first heat exchange elements and second heat exchange elements alternately stacked, and air flow channels formed in adjacent layers and extending in directions crossing each other, at least one of the first heat exchange elements and the second heat exchange elements using any of the heat exchange elements, and the air flow channels being formed by the plurality of partition ribs.

[0017] The third aspect of the present application provides a humidifying core including first heat exchange elements and second heat exchange elements alternately stacked, one of the first heat exchange elements and the second heat exchange elements using any of the heat exchange elements and forming air flow channels by the plurality of partition ribs, the other of the first heat exchange elements and the second heat exchange elements using any of the heat exchange elements and forming water flow channels by the plurality of partition ribs, the air flow channels and the water flow channels extending in directions crossing each other in adjacent layers.

[0018] The fourth aspect of the present application provides an air treatment device including the heat exchange unit, the air treatment device being one of a total heat exchanger, a fresh air machine, and an air conditioner indoor unit with the heat exchange unit; or including the humidifying core, the air treatment device being a humidifying device with the humidifying core.

[0019] The fifth aspect of the present application provides a manufacturing method of a heat exchange element, the heat exchange element being any of the heat exchange elements, including: a step of placing a heat exchange sheet into an injection molding mold; and a step of injecting a material onto the heat exchange sheet via a plurality of gates to form a frame, the plurality of gates including a plurality of second gates corresponding to a plurality of second gate marks.

[0020] Fig. 1 is a perspective view showing a total heat exchanger according to an embodiment of the present application.

[0021] Fig. 2 is a bottom view showing the total heat exchanger of Fig. 1.

[0022] Fig. 3 is a schematic perspective view showing an inner casing of the total heat exchanger of Fig. 1.

[0023] Fig. 4 is an enlarged view showing a heat exchange unit mounting portion provided in the inner casing of Fig. 3.

[0024] Fig. 5 is a perspective view of a heat exchange unit according to an embodiment of the present application.

[0025] Fig. 6 is an exploded perspective view of the heat exchange unit according to an embodiment of the present application.

[0026] Fig. 7 is a partial enlarged view of a heat exchange element A according to an embodiment of the present application.

[0027] Fig. 8 is a partial enlarged view of the heat exchange element A, showing a cutaway state of a part of a partition rib and a frame.

[0028] Fig. 9A shows a side view of the heat exchange element A.

[0029] Fig. 9B is a partial enlarged view of Fig. 9A.

[0030] Fig. 10A shows a side view of the heat exchange element A, viewed from a different direction from Fig. 9A.

[0031] Fig. 10B is a partial enlarged view of Fig. 10A.

[0032] Fig. 11 is an exploded perspective view schematically showing a partial structure in which two heat exchange elements A sandwich a heat exchange element B among a plurality of heat exchange elements.

[0033] Fig. 12 is a cross-sectional perspective view showing an engagement structure between stacked heat exchange elements.

[0034] Fig. 13 is a partial enlarged view showing an example of a first stopper.

[0035] Fig. 14 is a plan view of a heat exchange element B according to an embodiment of the present application.

[0036] Fig. 15 is a partial enlarged view of the heat exchange element B, showing a cutaway state of a part of a partition rib and a frame.

[0037] Fig. 16 shows a partial enlarged view of the heat exchange element B, viewed from a side.

[0038] Fig. 17 shows a partial enlarged view of the heat exchange element B, viewed from a different direction from Fig. 16.

[0039] Fig. 18 schematically shows six examples of the position of the second gate mark G in the frame of the first heat exchange element or the second heat exchange element, in each example, the central longitudinal dotted line indicates the main reinforcing rib, and the black dot thereon indicates the frame center; the left and right longitudinal dotted lines indicate the one-side auxiliary reinforcing rib and the other-side auxiliary reinforcing rib, and the black dots thereon indicate the second gate mark.

[0040] Fig. 19 is a diagram schematically showing an example of the injection molding duct.

[0041] Fig. 20 is a diagram schematically showing another example of the injection molding duct.

[0042] Hereinafter, the technical solutions of the embodiments and the modified examples of the present application will be described with reference to the accompanying drawings. In addition, the scope of the present application is not limited to the following embodiments and modified examples, and can be arbitrarily changed within the scope of the technical idea of the present application. Furthermore, in the following drawings, in order to facilitate the understanding of each structure, the actual configuration can be different from the scale, the number, and the like in each structure.

[0043] Here, for the convenience of explanation, three directions orthogonal to each other are set as the X direction, the Y direction, and the Z direction, and one side of the X direction is set as XI, the other side of the X direction is set as X2, one side of the Y direction is set as Yl, the other side of the Y direction is set as Y2, one side of the Z direction is set as Zl, and the other side of the Z direction is set as Z2.

[0044] For the convenience of explanation, the Zl direction is sometimes defined as the upward direction, and the Z2 direction is defined as the downward direction. However, the above definitions of the upward and downward directions are not limited to the actual orientation and positional relationship of each structural element of the heat exchange unit 100.

[0045] <Embodiment 1>

[0046] (Overall structure of the total heat exchanger)

[0047] Fig. 1 is a perspective view showing a total heat exchanger Q100 of the present embodiment as an air handling device, in which the total heat exchanger Q100 is in a state in which its bottom plate faces upward. Fig. 2 is a bottom view showing the total heat exchanger Q100 of Fig. 1, in which the bottom plate of the total heat exchanger Q100 is removed to expose its internal structure. Fig. 3 is a schematic perspective view showing an inner casing of the total heat exchanger Q100 of Fig. 1. Fig. 4 is an enlarged view showing a heat exchange unit 100 mounting portion provided in the inner casing of Fig. 3.

[0048] The total heat exchanger Q100 includes an apparatus housing C. The apparatus housing C can be formed of sheet metal. Inside the apparatus housing C, a heat exchange unit 100 is housed. Further, a fan, a filter, and the like can also be housed in the apparatus housing C. As shown in FIG. 1, a maintenance cover C1 is formed on a floor of the apparatus housing C, and the maintenance cover C1 is attached to the apparatus housing C so as to be openable and closable, thereby allowing an access hole of the apparatus housing C to be opened and closed.

[0049] The maintenance cover C1 can be pivotably attached to the floor of the apparatus housing C by, for example, a pivot. For example, the maintenance cover C1 can be attached to the floor of the apparatus housing C via a hinge. Further, the maintenance cover C1 can be detachably or openably attached to the apparatus housing C in other manners known in the art. For example, in a state of being attached, the portion of the apparatus housing C shown in FIG. 1 in which the maintenance cover C1 is provided is a floor facing downward. Also, it can be that the maintenance cover C1 protrudes from an outer surface of the floor of the apparatus housing C when closing the access hole, or it can be that the apparatus housing C is provided with a recess at a periphery of the access hole, and an outer surface of the maintenance cover C1 is flush with an outer surface of the apparatus housing C when closing the access hole. Further, instead of providing the maintenance cover on the floor, or in addition to providing the maintenance cover on the floor, a maintenance cover can be provided on a ceiling opposite to the floor. In the case of providing the maintenance cover on the floor, it is desirable that a cover fall prevention mechanism, such as a connecting cord, is also provided.

[0050] Further, a sealing structure can be provided on an inner surface of the apparatus housing C, for example, a sealing material can be attached, or a foamed inner housing can be provided.

[0051] Further, an inner surface of the floor of the apparatus housing C (the floor on which the maintenance cover C1 is attached) can be attached with a sealing material. The inner surface of the floor of the apparatus housing C can not be provided with an inner housing and a filter mounting groove.

[0052] The floor of the apparatus housing C is removed in FIG. 2 to expose the internal structure housed in the total heat exchanger Q100. Fresh air inlets JF, supply air inlets SF, return air inlets HF, and exhaust air inlets PF are provided in respective opposite side walls of the apparatus housing C. Among them, the fresh air inlets JF and the exhaust air inlets PF open to the outside, and the supply air inlets SF and the return air inlets HF open to the inside. Also, the fresh air inlets JF and the supply air inlets SF are located at two corners of the apparatus housing C that are located on one diagonal line, and the return air inlets HF and the exhaust air inlets PF are located at two corners of the apparatus housing C that are located on the other diagonal line.

[0053] The total heat exchanger Q100 is provided with an exhaust air fan F1 and a supply air fan F2, which are both volute fans. The exhaust air fan F1 communicates with the exhaust air inlets PF, and the supply air fan F2 communicates with the supply air inlets SF.

[0054] The heat exchanger Q100 is also provided with a heat exchange unit 100 located between the fresh air inlet JF and the supply air outlet SF, and between the return air inlet HF and the exhaust air outlet PF. In one mode of operation of the heat exchanger Q100, the exhaust air fan F1 and the supply air fan F2 are turned on, outdoor air is drawn into the fresh air inlet JF under the action of the supply air fan F2, flows through the heat exchange unit 100, and then enters the room through the supply air outlet SF, while indoor air is drawn into the return air inlet HF under the action of the exhaust air fan F1, flows through the heat exchange unit 100, and then is exhausted to the outdoors through the exhaust air outlet PF. Thus, the outdoor air and the indoor air cross flow in the heat exchange unit 100, and heat exchange or water vapor exchange occurs between them.

[0055] A PM2.5 filter GL1 can also be provided between the heat exchange unit 100 and the supply air fan F2, so that PM2.5 particles in the air can be filtered out before the air enters the room. The PM2.5 filter GL1 shown in the figure is generally L-shaped. The two ends of the PM2.5 filter GL1 are directly or indirectly connected to the side wall of the device housing C via a bracket or the like. In addition, instead of the L-shaped filter, a linear filter facing the heat exchange unit 100 can also be provided and installed through a filter screen mounting groove formed integrally with the core guide rail.

[0056] In addition, a preliminary filter GL2 can be installed at least one of the side of the heat exchange unit 100 facing the fresh air inlet JF and the side facing the return air inlet HF, which can filter out relatively large particles in the air before it enters the heat exchange unit 100, to prevent large particles in the air from damaging the heat exchange elements in the heat exchange unit 100.

[0057] A sensor CG can also be provided between the fresh air inlet JF and the heat exchange unit 100, and between the return air inlet HF and the heat exchange unit 100, for detecting the quality of the air entering the heat exchanger Q100, etc. The sensor CG can be, for example, a PM2.5 sensor, a temperature sensor, a humidity sensor, a carbon dioxide sensor, etc.

[0058] In addition, the heat exchanger Q100 also includes a fall-preventing pressure bar FL. The fall-preventing pressure bar FL is provided vertically below the heat exchange unit 100 and the preliminary filter GL2. In the installed state, the fall-preventing pressure bar FL presses on the heat exchange unit 100 or the preliminary filter GL2, so that when the maintenance cover plate C1 is opened for maintenance, the heat exchange unit 100 or the preliminary filter GL2 can be prevented from accidentally falling down. The fall-preventing pressure bar FL can be made of a metal material.

[0059] The fall-prevention strip FL can extend along a diagonal line of the heat exchange unit 100, and both ends thereof are fixed to the heat exchange unit mounting portions 300 at opposite corners of the diagonal line of the heat exchange unit 100. For example, one end of the fall-prevention strip FL is pivotally mounted to one corner of the diagonal line, and thus allows the heat exchange unit 100 to move in and out, for example, along the core mounting guide rail 301 by pivoting, and the other end of the fall-prevention strip FL is detachably connected to the other corner of the diagonal line by a fastener such as a bolt. Alternatively, instead of extending along the diagonal line of the heat exchange unit 100, the fall-prevention strip FL can extend parallel to the side of the heat exchange unit 100, and both ends thereof are fixed to the heat exchange unit mounting portions 300. The fall-prevention strip FL can extend along a diagonal line of the access hole, or extend parallel to the edge of the access hole. The fall-prevention strip FL can be disposed in the middle of the access hole.

[0060] The total heat exchanger Q100 can further include an inner housing NC disposed inside the equipment housing C, which is made of, for example, foamed material, and includes a plurality of support portions. A metal embedded part BJ can be disposed in the foamed inner housing NC for wiring, fixing, etc. A wire passing groove GX can also be disposed in the inner housing NC for wiring. Further, the heat exchange unit mounting portions 300, such as the four heat exchange unit mounting portions 300 shown in FIG. 3, can be disposed on the inner housing NC, and correspond to the four corners of the heat exchange unit 100, respectively. The heat exchange unit mounting portions 300 can be made of a metal material.

[0061] FIG. 4 shows an enlarged view of the heat exchange unit mounting portion 300. The core mounting guide rail 301 and the filter mounting guide rail 302 can be integrally formed on the heat exchange unit mounting portion 300. The four corners of the heat exchange unit 100 can be inserted into the core mounting guide rail 301 of the corresponding heat exchange unit mounting portion 300, thereby completing the fixed installation of the heat exchange unit 100. The two side edges of the primary filter GL2 can be inserted into the filter mounting guide rail 302 of the corresponding heat exchange unit mounting portion 300, thereby completing the installation of the primary filter GL2.

[0062] (Structure of Heat Exchange Unit)

[0063] Hereinafter, the structure of the heat exchange unit will be further described with reference to the accompanying drawings.

[0064] FIG. 5 is a perspective view of the heat exchange unit 100 of Embodiment 1. FIG. 6 is an exploded perspective view of the heat exchange unit 100 of Embodiment 1, with the illustration of the top plate 31 omitted. FIG. 7 is a partial enlarged view of the heat exchange element A used in the heat exchange unit 100. FIG. 8 is a partial enlarged view of the heat exchange element A, showing a cutaway state of a portion of the partitioning ribs 11a and the frame 10a. FIG. 9A shows a side view of the heat exchange element A as viewed from the Y direction. FIG. 9B is a partial enlarged view of FIG. 9A. FIG. 10A shows a side view of the heat exchange element A as viewed from the X direction. FIG. 10B is a partial enlarged view of FIG. 10A. FIG. 14 is a plan view of the heat exchange element B used in the heat exchange unit 100. FIG. 15 is a partial enlarged view of the heat exchange element B, showing a cutaway state of a portion of the partitioning ribs 11b and the frame 10b. FIG. 16 shows a partial enlarged view of the heat exchange element B as viewed from the X direction. FIG. 17 shows a partial enlarged view of the heat exchange element B as viewed from the Y direction.

[0065] The heat exchange unit 100 is used to exchange heat and moisture between air discharged to the outside and air introduced into the inside in the total heat exchanger Q100. The heat exchange unit 100 includes the heat exchange element A (first heat exchange element) and the heat exchange element B (second heat exchange element) alternately laminated as a core, and is formed with air flow passages as fluid passages that are routed in directions crossing each other in adjacent layers.

[0066] The heat exchange unit 100 can further include a base plate (not shown), the top plate 31, and side columns 32. The side columns 32 connect the base plate and the top plate 31. For example, the side columns 32 pass through the base plate, the top plate 31, and the edge portions of the first heat exchange elements and the second heat exchange elements sandwiched between the base plate and the top plate 31, to fix them.

[0067] (Structure of the first heat exchange element)

[0068] As shown in FIG. 6, the heat exchange element A as the first heat exchange element includes the heat exchange sheet 2a and the injection-molded frame 1a. The heat exchange element A is rectangular as viewed from the Z direction.

[0069] The heat exchange sheet 2a can be a film (e.g., a PP film) or paper having a heat exchange and humidity exchange function, or can be a metal. Air on one side (Z1 side) of the heat exchange sheet 2a and air on the other side (Z2 side) can exchange temperature and humidity via the heat exchange sheet 2a. For example, the heat exchange sheet 2a includes a base material layer and a functional layer. The base material layer is formed of at least one of a metal material, a plastic material, and a fiber material. Among them, the metal material can be, for example, an aluminum foil or the like, the plastic material can be, for example, polypropylene, polyethylene, or the like, and the fiber material can be, for example, paper or the like. Alternatively, other materials such as a polymer material, a molecular sieve, graphene, a zeolite, a modified material, and a composite chemical material can be used to form the base material layer. For example, the functional layer includes a moisture absorbing material, so that water molecules can be adsorbed on the functional layer. Also, the functional layer is provided to block, for example, CO2 molecules, viruses, and bacteria. Accordingly, a moisture permeable structure is formed on the base material layer, and the moisture permeable structure allows water molecules adsorbed on the functional layer to pass through the base material layer. The moisture permeable structure is, for example, a moisture permeable hole formed on the base material layer. The functional layer and the base material layer provided as described above act together, so that the heat exchange sheet can block harmful components such as CO2 molecules, viruses, and bacteria in the air, while allowing moisture and heat and the like to pass through the heat exchange sheet, so that the air supplied to the room can be effectively treated. The base material layer can be provided on one side (Z1 side) of the heat exchange sheet 2a in the thickness direction of the heat exchange sheet 2a. The thickness of the base material layer can be greater than the thickness of the functional layer. For example, the thickness of the base material layer is 10 to 20 micrometers, and the thickness of the functional layer is 0.5 to 1 micrometer. In addition, the heat exchange sheet has, for example, a strip-shaped pattern extending in the second direction, so as to suppress or avoid the heat exchange sheet from being broken at the strip-shaped pattern due to the influence of the air flow. The strip-shaped pattern can extend in the second direction in a wavy shape, so as to disperse the force of the air flow acting on the heat exchange sheet and reduce the risk of the heat exchange sheet being broken.

[0070] The frame 1a is provided on one side of the heat exchange sheet 2a in the thickness direction of the heat exchange sheet 2a (the frame is formed on the surface of one side of the base material layer of the heat exchange sheet). The frame 1a includes a frame 10a, a partition rib 11a, and a reinforcing rib 12a. The partition rib 11a extends in the Y direction (corresponding to the "first direction" of the present application) within the frame 10a, and separates adjacent air flow channels. The reinforcing rib 12a extends in a second direction (X direction in the heat exchange element A) intersecting (e.g., orthogonal to) the first direction (Y direction in the heat exchange element A) within the frame 10a, and is connected to the partition rib 11a. In more detail, the reinforcing rib 12a has a main reinforcing rib 121a and at least two auxiliary reinforcing ribs. A plurality of second gate marks G are respectively provided on the at least two auxiliary reinforcing ribs, which will be described below.

[0071] In the heat exchanging element A, the frame 10a has a rectangular frame shape when viewed in the Z direction. The frame 10a includes a pair of first sides 101a and 102a facing each other in the X direction (corresponding to the "second direction" of the present application) and a pair of second sides 103a and 104a facing each other in the Y direction. The first sides 101a and 102a extend in the Y direction. The second sides 103a and 104a extend in the X direction.

[0072] The first sides 101a and 102a and the second sides 103a and 104a are each formed with a plurality of side pillar mounting portions 13. More specifically, the side pillar mounting portions 13 of the heat exchanging element A are provided with through-holes Ha through which the side pillars 32 pass in the Z direction. The side pillar mounting portions 13 on the second sides 103a and 104a are provided, for example, at positions overlapping the partitioning ribs 11a when viewed in the Y direction. The side pillar mounting portions 13 on the first sides 101a and 102a are provided, for example, at positions overlapping the reinforcing ribs 12a when viewed in the X direction.

[0073] The partitioning ribs 11a are provided at a plurality of positions spaced apart in the second direction (X direction) (in the illustrated example, the partitioning ribs 11a are provided at equal intervals, but the present application is not limited to this). The Z direction height of the partitioning ribs 11a is equal to the height of the airflow passage in the Z direction. The partitioning ribs 11a are thin in the X direction (direction intersecting the airflow direction) so as to suppress a decrease in the area of the airflow passage. For example, the width (width in the second direction) of the partitioning ribs 11a is 1.2 mm or less, and, in order to ensure the strength of the partitioning ribs, the width (width in the second direction) of the partitioning ribs 11a is 0.5 mm or more. In the heat exchanging element A, a plurality of airflow passages along the Y direction are formed by the plurality of partitioning ribs 11a. The pitch b of the adjacent partitioning ribs 11a satisfies the following relationship: 5 mm ≤ b ≤ 15 mm. By setting the pitch of the partitioning ribs in the above range, it is possible to easily achieve uniformity and sufficiency of the injection during injection molding of the frame, for example, and it is possible to suppress or avoid an influence on the uniformity and sufficiency of the injection due to a wide pitch of the partitioning ribs or a wide pitch of adjacent gate marks caused by the wide pitch of the partitioning ribs. The two ends of the plurality of partitioning ribs 11a extending in the Y direction are connected to the second sides 103a and 104a of the frame, respectively.

[0074] The reinforcing rib 12a connects a plurality of partition ribs 11a arranged in the X direction. The partition rib 11a and the (Z2 side surface of the) reinforcing rib 12a are attached to the surface of one side (Z1 side) of the heat exchange fin 2a. In the Z direction of the heat exchange fin 2a, the thickness of the reinforcing rib 12a is smaller than the thickness of the partition rib 11a, so that when a gate mark is formed on the reinforcing rib, the burr on the gate mark can be prevented from touching the heat exchange fin, thereby causing damage to the heat exchange fin; at the same time, the proportion of the reinforcing rib in the airflow passage can be reduced, the airflow passage is less hindered by the reinforcing rib, the pressure loss is reduced, and the heat exchange efficiency is improved. For example, the thickness of the reinforcing rib 12a is less than or equal to half the thickness of the partition rib 11a. In addition, the width of the reinforcing rib 12a in the first direction (Y direction) can be greater than the width of the partition rib 11a in the second direction (X direction), so that the setting of the injection gate is facilitated. When the width of the reinforcing rib 12a in the Y direction is d, the following relationship is satisfied: d≤5mm, so that the airflow obstruction caused by the reinforcing rib 12a being too thick can be inhibited. The size of the reinforcing rib 12a in the first direction (Y direction) is greater than the size of the partition rib 11a in the second direction (X direction), for example. In one example, when the thickness of the partition rib 11a in the Z direction is a, the pitch of adjacent partition ribs 11a is b, and the length of the portion of the heat exchange fin between adjacent partition ribs 11a after maximum plastic deformation is c, the following relationships are satisfied:

[0075] wherein 5mm≤b≤15mm. The so-called "maximum plastic deformation" refers to the maximum amplitude deformation in the thickness direction of the heat exchange fin without causing damage to the heat exchange fin or affecting the function of the heat exchange fin (functional layer). By satisfying the above relationships, when the heat exchange elements are stacked one on top of another, the heat exchange fins of adjacent heat exchange elements can be prevented from contacting each other after deformation, thereby significantly reducing the heat exchange area; at the same time, the heat exchange area can be prevented from being significantly reduced due to the partition ribs being too dense, thereby ensuring the heat exchange performance; in addition, the repeated large deformation of the heat exchange fin can be inhibited, thereby prolonging the service life. In addition, the thickness a of the partition rib 11a in the Z direction can be set as: 1mm≤a≤5mm.

[0076] The reinforcing rib 12a has a main reinforcing rib 121a and at least two auxiliary reinforcing ribs. The at least two auxiliary reinforcing ribs are located between the main reinforcing rib 121a and the frame 10a. The at least two auxiliary reinforcing ribs include a one-side auxiliary reinforcing rib 122a1 and another-side auxiliary reinforcing rib 122a2 located on both sides of the main reinforcing rib 121a. The main reinforcing rib 121a is located at a central position in the Y direction of the frame 1a (including the Y direction center, a position deviated from the Y direction center to the Y1 side, or a position deviated from the Y direction center to the Y2 side). In the heat exchange element A of the present embodiment, the main reinforcing rib 121a is substantially located at the Y direction center of the frame 1a.

[0077] The main reinforcing rib 121a is formed continuously in the X direction. In the case where the reinforcing rib is provided continuously, the strength of the heat exchange member can be improved. The main reinforcing rib 121a connects the adjacent partition ribs 11a to each other. For example, the main reinforcing rib 121a is formed across the entire length of the frame la in the X direction. The Xl-side end of the main reinforcing rib 121a is connected to the Xl-side first side 101a among the first sides 101a, 102a. The X2-side end of the main reinforcing rib 121a is connected to the X2-side first side 102a among the first sides 101a, 102a.

[0078] The auxiliary reinforcing rib can be formed discontinuously in the X direction. In the case where the reinforcing rib is provided discontinuously, the reinforcing rib can be provided only at a necessary position, so that the strength of the heat exchange member can be ensured, and the wind resistance can be reduced, and the heat exchange efficiency of the heat exchange fin can be improved. The auxiliary reinforcing rib connects the adjacent partition ribs 11a to each other. For example, the one-side auxiliary reinforcing rib 122al and the other-side auxiliary reinforcing rib 122a2 are formed across the entire length of the frame la in the X direction. The one-side auxiliary reinforcing rib 122al and the other-side auxiliary reinforcing rib 122a2 are located on the Yl-side and the Y2-side of the main reinforcing rib 121a, respectively. The one-side auxiliary reinforcing rib 122al is located on the Yl-side of the main reinforcing rib 121a. The other-side auxiliary reinforcing rib 122a2 is located on the Y2-side of the main reinforcing rib 121a. The one-side auxiliary reinforcing rib 122al is located between the main reinforcing rib 121a and the frame 10a on the Yl-side of the main reinforcing rib 121a. The other-side auxiliary reinforcing rib 122a2 is located between the main reinforcing rib 121a and the frame 10a on the Y2-side of the main reinforcing rib 121a. The one-side auxiliary reinforcing rib 122al can be located at a middle position in the Y direction between the frame 10a (the second side 103a) on the Yl-side of the main reinforcing rib 121a and the main reinforcing rib 121a, for example, at the Y-directional center of the second side 103a and the main reinforcing rib 121a. The other-side auxiliary reinforcing rib 122a2 can be located at a middle position in the Y direction between the frame 10a (the second side 104a) on the Y2-side of the main reinforcing rib 121a and the main reinforcing rib 121a, for example, at the Y-directional center of the second side 104a and the main reinforcing rib 121a. The respective sizes of the main reinforcing rib 121a, the one-side auxiliary reinforcing rib 122al, and the other-side auxiliary reinforcing rib 122a2 can be the same or different.

[0079] The one-side auxiliary reinforcing rib 122a1 and the other-side auxiliary reinforcing rib 122a2 are discontinuously formed in the X direction in the heat exchange element A. By continuously forming the main reinforcing rib 121a in the second direction at the center of the frame 1a in the first direction and discontinuously forming the one-side auxiliary reinforcing rib 122a1 and the other-side auxiliary reinforcing rib 122a2 between the main reinforcing rib 121a and the frame 10a, it is possible to further favorably balance the reduction of the wind resistance and the securing of the strength of the heat exchange element A (i.e., it is possible to reduce the wind resistance and to secure the strength of the heat exchange element A). The one-side auxiliary reinforcing rib 122a1 and the other-side auxiliary reinforcing rib 122a2 can be configured to be symmetrical with respect to the main reinforcing rib 121a. The discontinuously formed one-side auxiliary reinforcing rib 122a1 includes a plurality of segments arranged at intervals in the X direction. For example, the one-side auxiliary reinforcing rib 122a1 includes segments (segments extending across two partition ribs 11a) connecting two partition ribs 11a arranged in the X direction in order, segments (segments extending across three partition ribs 11a) connecting three partition ribs 11a arranged in the X direction in order, segments (segments extending across five partition ribs 11a) connecting five partition ribs 11a arranged in the X direction in order, segments (segments extending across nine partition ribs 11a) connecting nine partition ribs 11a arranged in the X direction in order, a segment connecting the partition rib 11a closest to the X1 side to the first edge 101a, and a segment connecting the partition rib 11a closest to the X2 side to the first edge 102a, and the intervals between the adjacent segments are set at equal intervals in the X direction (in the example illustrated, but not limited thereto). The number of partition ribs 11a connected by each segment of the one-side auxiliary reinforcing rib 122a1 and the distance between the segments can be adjusted according to the size of the heat exchange element A in the X direction, the intervals of the adjacent partition ribs 11a, the support needs, the air flow requirements, and the like. For example, it can be configured such that the number of partition ribs crossed by the segment at the center of the frame 1a in the X direction is greater than the number of partition ribs crossed by the segment near the edge of the frame 1a in the X direction. In addition, the two ends of each segment of the one-side auxiliary reinforcing rib 122a1 in the X direction are connected to the partition rib 11a, or one end is connected to the partition rib 11a and the other end is connected to the frame 10a (the first edge 101a, 102a). The other-side auxiliary reinforcing rib 122a2 can be configured similarly to the one-side auxiliary reinforcing rib 122a1.

[0080] It is desirable that the one-side auxiliary reinforcing rib 122a1 and the other-side auxiliary reinforcing rib 122a2 each have a connecting portion connecting the partition rib 11a and the frame 10a (the first side 101a, 102a), and the second gate mark G is provided at the connecting portion. For example, as shown in FIG. 7, the one-side auxiliary reinforcing rib 122a1 has a connecting portion connecting the partition rib 11a on the X1 side and the first side 101a on the X1 side, and the second gate mark G is provided at the connecting portion. That is, the auxiliary reinforcing rib has a connecting portion connecting the partition rib 11a and the frame 10a, and the second gate mark G is provided at the connecting portion. Thereby, it is possible to further contribute to uniform distribution of the injection material on the entire frame 1a including the frame 10a, the partition rib 11a, and the reinforcing rib 12a.

[0081] It is desirable that the frame and the heat exchange fin are integrally formed by injection molding. The frame 1a can be integrally formed on the surface on one side (one side in the thickness direction) of the heat exchange fin 2a by injection molding. In the case where the heat exchange fin 2a includes a base material layer and a functional layer, the frame 1a is formed on the base material layer.

[0082] As described above, the plurality of second gate marks G are provided on the at least two auxiliary reinforcing ribs, respectively. Here, the second gate mark G is located on the side opposite to the heat exchange fin of the auxiliary reinforcing rib.

[0083] In the heat exchange element A, the main reinforcing rib 121a is located at the middle of the frame 10a, and at least two auxiliary reinforcing ribs are located between the main reinforcing rib 121a and the frame 10a, including a one-side auxiliary reinforcing rib 122a1 and another-side auxiliary reinforcing rib 122a2 located on both sides of the main reinforcing rib 121a, and N second gate marks G are arranged on the one-side auxiliary reinforcing rib 122a1 and the another-side auxiliary reinforcing rib 122a2 in the second direction, respectively. The second gate marks G at both ends of the one-side auxiliary reinforcing rib 122a1 (the second gate marks G at both ends of the N second gate marks G arranged in the second direction) are symmetrically centered about the center of the frame relative to the second gate marks G at both ends of the another-side auxiliary reinforcing rib 122a2 (the second gate marks G at both ends of the N second gate marks G arranged in the second direction). Thus, it is helpful to uniformly distribute the injection material, fully fill the thin ribs, inhibit or avoid the ribs from being disconnected, reduce the occurrence of the heat exchange sheet and the frame being peeled off, and improve the heat exchange efficiency of the core (the heat exchange unit 100). In addition, it can also inhibit or avoid the risk of the heat exchange sheet being cut by the disconnected ribs. Here, "symmetrical about one side and another side" includes complete symmetry about one side and another side, and also includes a distance within 5 mm from the position of the complete symmetry about one side and another side. For example, the n-th second gate mark G on the one-side auxiliary reinforcing rib 122a1 from one side in the second direction and the n-th second gate mark G on the another-side auxiliary reinforcing rib 122a2 from another side in the second direction are connected, and the line passes through the center of the frame, where N is greater than 2, n is greater than 1 and less than N. The n-th second gate mark G on the one-side auxiliary reinforcing rib 122a1 from one side in the second direction and the n-th second gate mark G on the another-side auxiliary reinforcing rib 122a2 from another side in the second direction can be symmetrically centered about the center of the frame. The heat exchange element B described below can also be configured in the same manner. In addition, in the heat exchange element A of the present embodiment, the plurality of second gate marks G on the one-side auxiliary reinforcing rib 122a1 and the plurality of second gate marks G on the another-side auxiliary reinforcing rib 122a2 are symmetric about the main reinforcing rib 121a.

[0084] In the present embodiment, a plurality of second gate marks G are arranged on the one-side auxiliary reinforcing rib 122a1 and the another-side auxiliary reinforcing rib 122a2 in the X direction (the extension direction of the auxiliary reinforcing rib). In the case where the one-side auxiliary reinforcing rib 122a1 and the another-side auxiliary reinforcing rib 122a2 are discontinuously formed in the X direction, the second gate marks G are respectively provided on each segment. In the case where a segment extends across two or three partition ribs 11a, one second gate mark G can be provided on the same segment. In the case where a segment extends across four or more partition ribs 11a, two or more second gate marks G can be provided on the same segment.

[0085] Further, a first gate mark can be provided on the main reinforcing rib 121a. Here, the first gate mark is located on the side of the main reinforcing rib opposite the heat exchange fin. For example, a plurality of first gate marks are arranged in the X direction (the extending direction of the main reinforcing rib) on the main reinforcing rib 121a. Thereby, the injection material can be further ensured to be sufficient (the injection material is made more uniform), and the frame can be inhibited or prevented from being disconnected due to insufficient injection material, thereby causing the heat exchange fin to be separated from the frame.

[0086] Further, although not shown, for example, a corrugated portion extending from the partition rib in a direction substantially perpendicular to the partition rib can be formed on the portion of the first heat exchange element located on both sides of the partition rib. The corrugated portion can be controllably formed by providing a mold structure. Research shows that by forming the corrugated portion, the heat exchange efficiency can be improved. For example, the range of the corrugated portion is controlled to be less than 1 / 2 of the distance between the two adjacent partition ribs.

[0087] (Structure of the second heat exchange element)

[0088] As shown in FIG. 6 and FIG. 14, the heat exchange element B as the second heat exchange element includes a heat exchange fin 2b and an injection molded frame 1b. When viewed from the Z direction, the heat exchange element B is rectangular.

[0089] The heat exchange fin 2b can be a thin film (for example, a PP thin film) or paper having a heat exchange and humidity exchange function, or can be metal. The air on one side (Z1 side) of the heat exchange fin 2b and the air on the other side (Z2 side) can exchange temperature and humidity via the heat exchange fin 2b. For example, the heat exchange fin 2b includes a base material layer and a functional layer. The base material layer and the functional layer of the heat exchange fin 2b can have the same configuration as the heat exchange fin 2a. The base material layer can be provided on the side of the heat exchange fin 2b in the thickness direction than the functional layer.

[0090] The frame 1b is provided on the side of the base material layer of the heat exchange fin 2b in the thickness direction. The frame 1b includes a frame 10b, a partition rib 11b, and a reinforcing rib 12b. A plurality of partition ribs 11b extend in the X direction (corresponding to the "first direction" of the present application) within the frame 10b, and partition adjacent air flow channels. The reinforcing rib 12b extends in a second direction (Y direction in the heat exchange element B) intersecting (for example, orthogonal to) the first direction (X direction in the heat exchange element B) within the frame 10b, and is connected to the partition rib 11b. More specifically, the reinforcing rib 12b has a main reinforcing rib 121b and at least two auxiliary reinforcing ribs. A plurality of second gate marks G are respectively provided on the at least two auxiliary reinforcing ribs. Here, the second gate mark G is located on the side of the auxiliary reinforcing rib opposite the heat exchange fin.

[0091] In the heat exchanging element B, the frame 10b is rectangular in shape when viewed in the Z direction. The frame 10b includes a pair of first edges 101b and 102b facing each other in the Y direction (corresponding to the "second direction" of the present application) and a pair of second edges 103b and 104b facing each other in the X direction. The first edges 101b and 102b extend in the X direction. The second edges 103b and 104b extend in the Y direction.

[0092] The first edges 101b and 102b and the second edges 103b and 104b are each formed with a plurality of side pillar mounting portions 13. More specifically, the side pillar mounting portions 13 of the heat exchanging element B are provided with through-holes Hb through which the side pillars 32 pass in the Z direction. The side pillar mounting portions 13 on the second edges 103b and 104b are provided, for example, at positions overlapping the partitioning ribs 11b when viewed in the X direction. The side pillar mounting portions 13 on the first edges 101b and 102b are provided, for example, at positions overlapping the reinforcing ribs 12b when viewed in the Y direction.

[0093] The partitioning ribs 11b are provided at a plurality of positions spaced apart in the second direction (Y direction) (in the illustrated example, the partitioning ribs are provided at equal intervals, but the present application is not limited to this). The Z direction height of the partitioning ribs 11b is equal to the height of the airflow passage in the Z direction. The partitioning ribs 11b are thin in the Y direction (direction intersecting the airflow direction) so as to suppress reduction in the area of the airflow passage. For example, the width (width in the second direction) of the partitioning ribs 11b is 1.2 mm or less. In the heat exchanging element B, a plurality of airflow passages in the X direction are formed by the plurality of partitioning ribs 11b. The pitch b of adjacent partitioning ribs 11b is set so as to satisfy the following relationship: 5 mm ≤ b ≤ 15 mm. By setting the pitch of the partitioning ribs within the above range, uniformity and sufficiency of the injection can be easily achieved, for example, and it is possible to suppress or avoid the uniformity and sufficiency of the injection being affected by the pitch of the partitioning ribs being too wide, or particularly the pitch of adjacent gate marks being too wide. The ends of the plurality of partitioning ribs 11b extending in the X direction are connected to the second edges 103b and 104b of the frame, respectively.

[0094] The reinforcing ribs 12b connect a plurality of partitioning ribs 11b arranged in the Y direction. The partitioning ribs 11b and the reinforcing ribs 12b (the Z2 side surface) are attached to the surface of one side (Z1 side) of the heat exchanging fin 2b. In the Z direction of the heat exchanging fin 2b, the thickness of the reinforcing ribs 12b is smaller than the thickness of the partitioning ribs 11b, whereby when a gate mark is formed on the reinforcing rib, it is possible to avoid the burr on the gate mark from coming into contact with the heat exchanging fin, thereby causing damage to the heat exchanging fin. Further, it is possible to make the width of the reinforcing ribs 12b in the first direction larger than the width of the partitioning ribs 11b in the second direction, whereby it is convenient for the setting of the injection gate. When the width of the reinforcing ribs 12b in the X direction is d, the following relationship is satisfied: d ≤ 5 mm, whereby it is possible to suppress the airflow from being blocked too much and the pressure loss from being high due to the reinforcing ribs 12b being too thick.

[0095] More specifically, the reinforcing rib 12b has a main reinforcing rib 121b, a side auxiliary reinforcing rib 122b1, and another side auxiliary reinforcing rib 122b2. The main reinforcing rib 121b is located at a position in the X direction central portion of the frame 1b (including the X direction center, a position deviated from the X direction center toward the X1 side, or a position deviated from the X direction center toward the X2 side). In the heat exchange element B, the main reinforcing rib 121b is located substantially at the X direction center of the frame 1b.

[0096] The main reinforcing rib 121b is formed continuously in the Y direction. In the case where the reinforcing rib is provided continuously, the strength of the heat exchange element can be improved. For example, the main reinforcing rib 121b is formed across the entire length of the frame 1b in the Y direction. The Y1 side end of the main reinforcing rib 121b is connected to the first edge 101b on the Y1 side among the first edges 101b, 102b. The Y2 side end of the main reinforcing rib 121b is connected to the first edge 102b on the Y2 side among the first edges 101b, 102b.

[0097] The auxiliary reinforcing rib can be formed discontinuously in the Y direction. In the case where the reinforcing rib is provided discontinuously, it is possible to provide the reinforcing rib only at a necessary position, to ensure the strength of the heat exchange element, and to reduce the wind resistance and improve the heat exchange efficiency of the heat exchange fin. The auxiliary reinforcing rib connects adjacent partition ribs 11b to each other. For example, the side auxiliary reinforcing rib 122b1 and the other side auxiliary reinforcing rib 122b2 are formed across the entire length of the frame 1b in the Y direction. The side auxiliary reinforcing rib 122b1 and the other side auxiliary reinforcing rib 122b2 are located on the X1 side and the X2 side of the main reinforcing rib 121b, respectively. The side auxiliary reinforcing rib 122b1 is located at a position on the first direction side (X1 side) of the main reinforcing rib 121b. The other side auxiliary reinforcing rib 122b2 is located at a position on the other first direction side (X2 side) of the main reinforcing rib 121b. The side auxiliary reinforcing rib 122b1 is located between the main reinforcing rib 121b and the frame 10b on the X1 side of the main reinforcing rib 121b. The other side auxiliary reinforcing rib 122b2 is located between the main reinforcing rib 121b and the frame 10b on the X2 side of the main reinforcing rib 121b. The side auxiliary reinforcing rib 122b1 can be located at a position in the X direction central portion between the frame 10b (second edge 103b) on the X1 side of the main reinforcing rib 121b and the main reinforcing rib 121b, for example, the X direction center of the second edge 103b and the main reinforcing rib 121b. The other side auxiliary reinforcing rib 122b2 can be located at a position in the X direction central portion between the frame 10b (second edge 104b) on the X2 side of the main reinforcing rib 121b and the main reinforcing rib 121b, for example, the X direction center of the second edge 104b and the main reinforcing rib 121b. The respective sizes of the main reinforcing rib 121b, the side auxiliary reinforcing rib 122b1, and the other side auxiliary reinforcing rib 122b2 can be the same or different.

[0098] In the heat exchange element B, the one-side auxiliary reinforcing rib 122b1 and the other-side auxiliary reinforcing rib 122b2 are discontinuously formed in the Y direction. By continuously forming the main reinforcing rib 121b located in the center of the first direction of the frame 1b in the second direction and discontinuously forming the one-side auxiliary reinforcing rib 122b1 and the other-side auxiliary reinforcing rib 122b2 between the main reinforcing rib 121b and the frame 10b, it is possible to further favorably balance the reduction of the wind resistance and the securing of the strength of the heat exchange element B (i.e., it is possible to reduce the wind resistance and to secure the strength of the heat exchange element B). The one-side auxiliary reinforcing rib 122b1 and the other-side auxiliary reinforcing rib 122b2 can be configured to be symmetrical with respect to the main reinforcing rib 121b. The discontinuously formed one-side auxiliary reinforcing rib 122b1 includes a plurality of segments arranged at intervals in the Y direction. For example, the one-side auxiliary reinforcing rib 122b1 includes segments (segments extending across two partition ribs 11b) connecting two partition ribs 11b arranged in the Y direction in order, segments (segments extending across three partition ribs 11b) connecting three partition ribs 11b arranged in the Y direction in order, a segment connecting the partition rib 11b closest to the Y1 side and the first edge 101b, and a segment connecting the partition rib 11b closest to the Y2 side and the first edge 102b, and the intervals between the adjacent segments are set at equal intervals in the Y direction (in the illustrated example, but not limited thereto). The number of partition ribs 11b connected by each segment of the one-side auxiliary reinforcing rib 122b1 and the distance between the segments can be adjusted according to the size of the heat exchange element B in the Y direction, the interval of the adjacent partition ribs 11b, the support requirement, the air flow requirement, and the like. For example, it can be configured so that the number of partition ribs crossed by the segment located in the center of the Y direction of the frame 1b is greater than the number of partition ribs crossed by the segment close to the edge of the Y direction of the frame 1b. In addition, both ends of each segment of the one-side auxiliary reinforcing rib 122b1 in the Y direction are connected to the partition rib 11b, or one end is connected to the partition rib 11b and the other end is connected to the frame 10b (the first edge 101b, 102b). The other-side auxiliary reinforcing rib 122b2 can be configured similarly to the one-side auxiliary reinforcing rib 122b1.

[0099] It is desirable that the one-side auxiliary reinforcing rib 122b1 and the other-side auxiliary reinforcing rib 122b2 each have a connecting portion connecting the partition rib 11b and the frame 10b (the first edge 101a, 102a), and that the second gate mark G is provided in the connecting portion. For example, as illustrated in FIG. 14, the one-side auxiliary reinforcing rib 122b1 has a connecting portion connecting the partition rib 11b closest to the Y1 side and the first edge 101b on the Y1 side, and the second gate mark G is provided in the connecting portion. That is, the auxiliary reinforcing rib has a connecting portion connecting the partition rib and the frame, and the second gate mark G is provided in the connecting portion.

[0100] It is desirable that the frame is integrally formed with the heat exchange fin by injection molding. The frame 1b can be integrally formed on the surface of the base material layer side of the heat exchange fin 2b by injection molding (one side in the thickness direction).

[0101] A plurality of second gate marks G are arranged on the one-side auxiliary rib 122b1 and the other-side auxiliary rib 122b2 in the Y direction. The plurality of second gate marks G on the one-side auxiliary rib 122b1 and the plurality of second gate marks G on the other-side auxiliary rib 122b2 are symmetrical about the main rib 121b. The second gate marks G are symmetrically arranged by the dry gate marks G, and the injected material flowing from the symmetrical gates can flow along the predetermined route in the injection mold, can uniformly and quickly fill the mold, and can improve the processing efficiency. In addition, the injection amount of the injected material on both sides can be basically the same, the uniformity of the heat exchange element can be maintained, and the overall uniformity of the heat exchange element can be improved. The heat exchange element integrally formed by injection molding is beneficial to reducing the height of the heat exchange element due to the improvement of the uniformity (especially the uniformity in the height direction), and is further beneficial to reducing the height of the heat exchange unit, thereby realizing the miniaturization and thinning of the total heat exchanger. In addition, under the same height condition, as many heat exchange elements as possible can be arranged, and the heat exchange efficiency of the total heat exchanger can be improved. Here, "symmetrical about one side and the other side" includes complete symmetry about one side and the other side, and also includes a distance within 5 mm from the position of the complete symmetry about one side and the other side. In the case where the one-side auxiliary rib 122b1 and the other-side auxiliary rib 122b2 are discontinuously formed in the Y direction, the second gate marks G are provided on each segment of the discontinuity. In the case where the segment extends across two or three partition ribs 11b, one or more second gate marks G can be provided on the same segment.

[0102] The first heat exchange element and the second heat exchange element can be engaged in the stacking direction (Z direction) at the frame, so as to stack a plurality of heat exchange elements. Hereinafter, the engagement structure of the first heat exchange element and the second heat exchange element will be described by taking the heat exchange element A and the heat exchange element B as examples.

[0103] Fig. 11 is a diagram schematically showing a partial structure of two heat exchange elements A sandwiching a heat exchange element B in a plurality of heat exchange elements, and the illustration of the heat exchange fin is omitted.

[0104] The second edge 103a in the frame 10a of the heat exchange element A in the upper layer in Fig. 11, which extends in the X direction, is configured to include a first protrusion 103al connected to the Yl-side end of the plurality of partitioning ribs 11a arranged in the X direction on the Z2 side and extending in the X direction, and a second protrusion 103a2 connected to the Yl-side end of the plurality of partitioning ribs 11a on the Zl side and extending in the X direction, with the first protrusion 103al being on the Y2 side of the second protrusion 103a2 (the first protrusion 103al is positioned further inside the frame than the second protrusion 103a2). The width of the first protrusion 103al in the Y direction is, for example, greater than the width of the second protrusion 103a2 in the Y direction. In addition, the second edge 104a can also have the same structure as the second edge 103a.

[0105] The first edge 101a in the frame 10a of the heat exchange element A, which extends in the Y direction, is configured to include a first recess 101al recessed toward the Z2 side on the X2 side (positioned further inside the frame), and a second recess 101a2 recessed toward the Zl side adjacent to the first recess 101al (positioned further outside the frame). In addition, the second edge 102a can also have the same structure as the first edge 101a.

[0106] The first edge 101b in the heat exchange element B in the middle layer in Fig. 11, which extends in the X direction, is configured to include a second recess 101b2 corresponding to the second protrusion 103a2 of the heat exchange element A stacked on the Z2 side, which is recessed toward the Zl side, and a first recess 101bl recessed toward the Z2 side formed adjacent to the Y2 side of the second recess 101b2 (positioned further inside the frame than the second recess 101b2). In addition, the second edge 102b can also have the same structure as the first edge 101b.

[0107] The second edge 103b in the frame 10b of the heat exchange element B, which extends in the Y direction, is configured to include a first protrusion 103bl connected to the Xl-side end of the plurality of partitioning ribs 11b arranged in the Y direction on the Z2 side and extending in the Y direction, and a second protrusion 103b2 connected to the Xl-side end of the plurality of partitioning ribs 11b on the Zl side and extending in the Y direction, with the first protrusion 103bl being on the X2 side of the second protrusion 103b2 (the first protrusion 103bl is positioned further inside the frame than the second protrusion 103b2). In addition, the second edge 104b can also have the same structure as the second edge 103b.

[0108] The first edge 101a extending in the Y direction in the heat exchange element A on the lower layer in Fig. 11 is configured the same as the first edge 101a extending in the Y direction in the heat exchange element A on the upper layer in Fig. 11 to include the first recessed portion 101a1 corresponding to the first protruding portion 103b1 and recessed toward the Z2 side, and the second recessed portion 101a2 adjacent to the first recessed portion 101a1 on the X1 side (a position further outward than the first recessed portion 101a1 from the frame) and recessed toward the Z1 side. The second edge 103a extending in the X direction in the heat exchange element A on the lower layer in Fig. 11 is configured the same as the second edge 103a extending in the X direction in the heat exchange element A on the upper layer in Fig. 11 to include the first protruding portion 103a1 connected to the Y1 side end portion of the plurality of partitioning ribs 11a arranged in the X direction on the Z2 side and extending in the X direction, and the second protruding portion 103a2 connected to the Y1 side end portion of the plurality of partitioning ribs 11a arranged in the X direction on the Z1 side and extending in the X direction, wherein the first protruding portion 103a1 is located on the Y2 side of the second protruding portion 103a2 (the first protruding portion 103a1 is located further inward than the second protruding portion 103a2 from the frame).

[0109] When the plurality of heat exchange elements including the heat exchange element A on the upper layer, the heat exchange element B on the middle layer, and the heat exchange element A on the lower layer as described above are sequentially stacked in the Z direction, the first protruding portion 103a1 of the second edge 103a extending in the X direction in the frame 1a of the heat exchange element A on the lower layer is engaged with the first recessed portion 101b1 of the first edge 101b extending in the X direction in the frame 1b of the heat exchange element B on the Z2 side to constitute a first engagement connection portion, and at the same time, the second protruding portion 103a2 of the frame 1a of the heat exchange element A on the lower layer is engaged with the second recessed portion 101b2 in the first edge 101b extending in the X direction in the frame 1b of the heat exchange element B on the Z1 side to constitute a second engagement connection portion.

[0110] The first protruding portion 103b1 of the second edge 103b extending in the Y direction in the frame 1b of the heat exchange element B is engaged with the first recessed portion 101a1 of the first edge 101a extending in the Y direction in the frame 1a of the heat exchange element A to constitute a first engagement connection portion, and at the same time, the second recessed portion 101a2 extending in the Y direction in the frame 1a of the heat exchange element A is engaged with the second protruding portion 103b2 of the second edge 103b extending in the Y direction in the frame 1b of the heat exchange element B on the Z2 side to constitute a second engagement connection portion.

[0111] Thus, the upper heat exchange element A and the middle heat exchange element B are engaged to form an air flow passage extending in the X direction divided by the partitioning rib 11b of the heat exchange element B. The middle heat exchange element B and the lower heat exchange element A are engaged to form an air flow passage extending in the Y direction divided by the partitioning rib 11a of the heat exchange element A.

[0112] Hereinafter, the first engagement connecting portion in which the first protrusion 103b1 and the first recess 101a1 are engaged, and the second engagement connecting portion in which the second recess 101a2 and the second protrusion 103b2 are engaged will be further described.

[0113] FIG. 12 is a cross-sectional view showing the engagement structure between the stacked heat exchange elements, and shows the engagement structure between the stacked multi-layer heat exchange elements (including the upper heat exchange element B, the middle heat exchange element A, and the lower heat exchange element B). FIG. 13 is a partial enlarged view showing an example of the first stopper.

[0114] As shown in FIG. 12, the first protrusion 103b1 of the upper heat exchange element B is engaged with the first recess 101a1 of the heat exchange element A on the Z2 side to constitute the first engagement connecting portion. The second protrusion 103b2 of the lower heat exchange element B is engaged with the second recess 101a2 of the heat exchange element A on the Z1 side to constitute the second engagement connecting portion. The first engagement connecting portion and the second engagement connecting portion in the same layer are located at positions on the frame outer side (left side in FIG. 12) of the first engagement connecting portion. The first engagement connecting portion is formed at a position on the downstream side of the inlet of the air flow passage of the adjacent layer to prevent leakage of the gas flowing into the air flow passage of the adjacent layer.

[0115] In one preferred embodiment, in the first engagement connecting portion, a first stopper D1 is formed in one of the first protrusion 103b1 and the first recess 101a1 so as to protrude toward the other. For example, in the example of FIGS. 12 and 13, the first stopper D1 is formed in the first protrusion 103b1. The first stopper D1 protrudes from substantially the middle of the first protrusion 103b1 in the X direction and abuts against the first recess 101a1 of the heat exchange element A. The first stopper D1 extends along the first protrusion 103b1. For example, the first stopper D1 extends in the entire Y direction of the frame 10b, but is not limited thereto.

[0116] Further, the side wall on the X2 side (frame inner side) of the first recess 101a1 constitutes a second stopper D2. That is, the second stopper D2 is further formed on the edge of the X2 side of the first recess 101a1. The second stopper D2 extends along the first recess 101a1. For example, the second stopper D2 extends in the entire Y direction of the frame 10a, but is not limited thereto. Further, the inner side wall surface of the first recess 101a1 on which the second stopper D2 is located can be formed with a chamfer to facilitate the engagement of the first protrusion.

[0117] By forming the first barrier, since the first barrier has a certain height, a certain gap can be left between the first protrusion and the first recess, which can be used to accommodate, for example, glue sealing between the first protrusion and the first recess, thereby preventing the glue from overflowing into the airflow channel or the heat exchange element. By forming the second barrier, the second barrier is closer to the inner side of the frame than the first barrier, so that the glue between the first protrusion and the first recess can be prevented from overflowing into the airflow channel or the heat exchange element from the inner side of the frame.

[0118] In addition, the number and position of the reinforcing ribs in the direction of extension of the partition rib (the first direction) can be adjusted according to the size of the heat exchange element in the direction of extension of the partition rib, the support requirement, the airflow requirement, etc. In FIG. 14, an example of a first heat exchange element and a second heat exchange element each having two auxiliary reinforcing ribs (one side auxiliary reinforcing rib and the other side auxiliary reinforcing rib each having one) is exemplarily shown. However, it is not limited thereto, and the one side auxiliary reinforcing rib and the other side auxiliary reinforcing rib can each have multiple ones to increase the strength of the heat exchange element. However, in the case of having two auxiliary reinforcing ribs (one side auxiliary reinforcing rib and the other side auxiliary reinforcing rib each having one), the obstruction to the airflow channel can be reduced, and the pressure loss can be reduced.

[0119] (Method for manufacturing heat exchange element)

[0120] Hereinafter, a method for manufacturing the first heat exchange element and the second heat exchange element will be described. Hereinafter, the first heat exchange element and the second heat exchange element will be collectively referred to as a "heat exchange element" without being particularly distinguished.

[0121] The frame of the heat exchange element is an injection molded frame. The frame is integrally formed on the heat exchange sheet by injection molding, for example, and the material of the frame can be selected from plastics (e.g., glass fiber reinforced polypropylene, polystyrene, acrylonitrile-styrene-butadiene copolymer). The frame can be made of the same material as the base material layer. In the case where the heat exchange sheet includes a base material layer and a functional layer, the frame is integrally formed on the surface of the base material layer side of the heat exchange sheet by injection molding, for example.

[0122] The manufacturing method of the heat exchange element comprises the steps of: placing the heat exchange sheet into an injection molding mold; and injecting material onto the heat exchange sheet through multiple gates to form the frame. The multiple gates comprise multiple second gates corresponding to multiple second gate marks (second gate marks provided on the auxiliary reinforcing ribs, such as the second gate mark G in the above embodiment). The injection raw material is melted in a barrel (the injection raw material can be made by a known method. In an example, polypropylene and glass fiber are selected to make the injection raw material). The barrel heating temperature can be divided into 4-6 segments (in an example, the temperature towards the nozzle is sequentially set to 140℃, 230℃, 235℃, 235℃, and 245℃). The melted raw material is injected into the mold in which the heat exchange sheet is placed in advance. The mold temperature can be adjusted to 10-80℃ by a temperature adjusting mechanism (such as a liquid cooling mechanism provided on the mold). The injection pressure can be 90-130Mpa. The injection speed can be 50-99g / s. In addition, the gate can also comprise multiple first gates corresponding to multiple first gate marks (first gate marks provided on the main reinforcing ribs). By controlling the injection temperature, the injection material can quickly and uniformly fill the mold (especially in the case of symmetrical gate mark arrangement), and the heat exchange sheet can be prevented from being deformed or the function of the heat exchange sheet being damaged (such as the functionality of the functional layer being destroyed) due to the injection temperature being too high. In addition, controlling the injection temperature can also make the injection part quickly solidify and improve the processing efficiency.

[0123] In addition, although not shown, an indication part can be formed on the heat exchange sheet to indicate the base material layer or the functional layer of the heat exchange sheet. For example, the indication part is formed on at least one of the base material layer or the functional layer, and comprises at least one of a notched part, a convex point, printed text, and a mark symbol.

[0124] The gate pin traces are designed according to the distribution of the gate pin traces. Fig. 19 schematically shows an example of injection molding pipe, which can be used for manufacturing either the first heat exchange element or the second heat exchange element. For example, it can be applied to the first heat exchange element or the second heat exchange element, in which the one side auxiliary reinforcing ribs and the other side auxiliary reinforcing ribs are provided with a plurality of (two in Fig. 19) gate pin traces, respectively, and the heat exchange element is provided with a first gate pin trace at the main reinforcing rib and a second gate pin trace at the auxiliary reinforcing rib. As shown in Fig. 19, in the case where a plurality of first gate pin traces and a plurality of second gate pin traces G are provided, the injection molding pipe can be provided with a plurality of transverse pipes g1 extending radially from the main gate pin at the center of the frame in the plane perpendicular to the Z direction; and longitudinal pipes g2 bent from the plurality of transverse pipes g1 in the Z2 direction (at least during injection, the Z2 direction is below the vertical direction). The transverse pipes g1 can be formed in a branched shape. Desirably, the transverse pipes g1 are connected to the longitudinal pipes g2 at the front end of each branch. In the case where a plurality of gate pins are provided on a straight line (for example, straight line ZX in Fig. 19) from the center, desirably, the gate pin closer to the center is the gate pin of the longitudinal pipe g2 connected to the front end of the transverse pipe g1 extending from the straight line ZX, and the gate pin farther from the center is the gate pin of the longitudinal pipe g2 connected to the front end of the branched pipe g12 extending from the adjacent transverse pipe g1 to the straight line ZX in the plane perpendicular to the Z direction, thereby facilitating the uniform flow of the molten injection material into the mold in a short time. Further, the branched pipe g12 can also be formed in a branched shape. Desirably, the branched pipe g12 is connected to the longitudinal pipe g2 at the front end of each branch. In other words, the branched portions of the branched transverse pipe g1 and the branched pipe g12 are located on the upstream side of the connection between the transverse pipe g1 or the branched pipe g12 and the longitudinal pipe g2, respectively, thereby also facilitating the uniform flow of the molten injection material into the mold in a short time. Paths for the molten injection material are formed inside each pipe g1, g2, g12, and the transverse pipe g1 or the branched pipe g12 and the longitudinal pipe g2 are connected to each other at the connection portion. The molten injection material entering from the main gate pin is injected from the front gate pin of each longitudinal pipe g2.

[0125] Fig. 20 schematically shows another example of an injection molding pipe that can be used in the manufacture of either of the first heat exchange element and the second heat exchange element, for example, can be applied to the first heat exchange element or the second heat exchange element in which one side auxiliary reinforcing rib and the other side auxiliary reinforcing rib are respectively provided with one second gate mark. In the example of Fig. 20, the injection molding pipe has: a first pipe g3 extending from the main gate at the center of the frame to both sides in the first direction; two second pipes g4 respectively extending from both ends of the first pipe g3 to both sides in the second direction; and a plurality of third pipes g5 respectively extending from a plurality of positions of the second pipe g4 in the second direction to the first direction and outside the frame and then extending downward in the vertical direction. Each of the pipes g3, g4, and g5 is internally formed with a path for the molten injection material to pass through, and the first pipe g3 or the third pipe g5 is in communication with the second pipe g4 at the connected part. The molten injection material entering from the main gate is injected from the front gate of each of the third pipes g5 to the periphery.

[0126] According to the heat exchange element and the manufacturing method thereof of the present disclosure, the glue injection ports are uniformly arranged from the center of the heat exchange element to the periphery, which can improve the uniformity of the injection and inhibit or avoid the peeling of the heat exchange fins from the frame due to insufficient injection.

[0127] <Variant Example 1>

[0128] The present variant example provides a humidifying device as an air handling device. The humidifying device has a humidifying core. The humidifying core includes first heat exchange elements and second heat exchange elements alternately stacked. In the present variant example, the first heat exchange elements and the second heat exchange elements can be configured in the same manner as the heat exchange elements of the above-described Embodiment 1. One of the first heat exchange elements and the second heat exchange elements forms air flow passages as fluid passages by the plurality of partition ribs provided therein, and the other forms water flow passages as fluid passages by the plurality of partition ribs provided therein. The air flow passages and the water flow passages extend in directions crossing each other in adjacent layers. In Embodiment 1, the heat exchange elements are stacked to constitute a heat exchange unit. The heat exchange unit can be provided in an air handling device such as a total heat exchanger, a fresh air machine, an air conditioner indoor unit with a ventilation function, or the like, and performs heat exchange processing on indoor and outdoor air flowing therethrough.

[0129] In the present variant example, the heat exchange elements are used for humidification, a plurality of heat exchange elements are stacked to constitute a humidifying core, air and water flow through the flow passages of two adjacent heat exchange elements, respectively, the humidifying core is provided in a humidifying device, and water in the water-side passages of the humidifying core is entrained into the air-side flow passages when air flows through the humidifying core, so that the air can be humidified.

[0130] The air treatment device described above can be used alone or in combination, for example, a humidifying device is arranged on the downstream side of the air supply path of the total heat exchanger; two devices can be integrally arranged or separately arranged.

[0131] In addition, in the present modification, for example, the water flow passage extends in the up-down direction, and the air flow passage extends crossing the water flow passage; the two ends of the water flow passage are sealed by means of glue coating or the like to prevent water leakage.

[0132] In one example, when used as a humidifying core, the heat exchange sheet of the heat exchange element adopts a film or paper with a moisture permeable function, and the film or paper includes a base material layer and a moisture permeable layer arranged on the base material layer; the height (height in the thickness direction of the heat exchange sheet) of the reinforcing rib is smaller than the height of the partition rib, while ensuring the strength of the heat exchange element to withstand water pressure and air pressure, the air flow and water flow can be reduced, and the humidifying effect can be increased.

[0133] <Modification 2>

[0134] The present modification provides a heat exchange element, which includes a heat exchange sheet and a frame formed by injection molding, the frame is arranged on the surface of one side of the heat exchange sheet, and the frame includes: a frame; a partition rib, which extends in a first direction within the frame and separates adjacent air flow passages; and a reinforcing rib, which extends in a second direction crossing the first direction within the frame and is connected with the partition rib, the reinforcing rib has a main reinforcing rib and at least two auxiliary reinforcing ribs, the main reinforcing rib is located at a middle position of the frame, the at least two auxiliary reinforcing ribs include a one-side auxiliary reinforcing rib and an opposite-side auxiliary reinforcing rib respectively located on both sides of the main reinforcing rib, and a plurality of second gate marks are arranged on the at least two auxiliary reinforcing ribs respectively. The heat exchange element is manufactured by a manufacturing method including the following steps: a step of placing the heat exchange sheet into an injection molding mold; and a step of forming the frame by injecting material onto the heat exchange sheet through an injection pipe with a plurality of gates, the plurality of gates include a plurality of second gates corresponding to the plurality of second gate marks. The injection pipe forms a plurality of injection paths connecting the main gate and the plurality of gates, under the premise that the diameters of the injection paths are the same, the injection material travel lengths from the main gate to the second gates corresponding to the one-side auxiliary reinforcing rib and the opposite-side auxiliary reinforcing rib are the same, or the injection material flow pressure losses from the main gate to the second gates corresponding to the one-side auxiliary reinforcing rib and the opposite-side auxiliary reinforcing rib are the same. Thus, the time length of the injection material flowing from the main gate to the second gates corresponding to the one-side auxiliary reinforcing rib and the opposite-side auxiliary reinforcing rib and the change of the injection material temperature are substantially the same, thereby ensuring the uniformity of the injection molding part. In the present modification, the second gates corresponding to the one-side auxiliary reinforcing rib and the opposite-side auxiliary reinforcing rib can be symmetrical about the main gate.

[0135] <Other Modifications>

[0136] The present application has been described above with reference to the drawings, and it is obvious that the specific implementation of the present application is not limited to the above-described embodiments.

[0137] In addition, in the above-described embodiments, the injection-molded frame can be adhered to one side in the thickness direction of the heat exchanger by an adhesive.

[0138] In addition, in the above-described embodiments, the number of partitioning ribs and the number of reinforcing ribs can be appropriately set as needed.

[0139] In one example, the first heat exchanger element and the second heat exchanger element are formed into a square shape, the first heat exchanger element has a smaller number of partitioning ribs, thereby increasing the heat exchange area, and the second heat exchanger element has a larger number of partitioning ribs, thereby having better strength. With such a first heat exchanger element and a second heat exchanger element, a balance between heat exchange and strength can be achieved.

[0140] In addition, in the above-described embodiments, the main reinforcing ribs 121a (main reinforcing ribs 121b) can also be discontinuously formed in the second direction, and the auxiliary reinforcing ribs (one-side auxiliary reinforcing ribs, other-side auxiliary reinforcing ribs) can also be continuously formed in the second direction.

[0141] In addition, in the above-described embodiments, the shapes of the heat exchanger element A (heat exchanger element B) and the frame 1a (frame 1b) are not limited to a rectangular shape, but can be a square shape, a circular shape, an elliptical shape, a polygonal shape, or other shapes.

[0142] In addition, in the above-described embodiments, the heat exchanger unit 100 includes the heat exchanger element A and the heat exchanger element B alternately stacked as the first heat exchanger element and the second heat exchanger element. However, this is not limiting, and either one of the heat exchanger element A and the heat exchanger element B can be used as one of the first heat exchanger element and the second heat exchanger element, and the other one of the first heat exchanger element and the second heat exchanger element can use an existing chip. In addition, the heat exchanger element A rotated by a prescribed angle can be used instead of the heat exchanger element B, or the heat exchanger element B rotated by a prescribed angle can be used instead of the heat exchanger element A. In this case, the heat exchanger element A or the heat exchanger element B is formed, for example, into an even-numbered-sided regular polygon of four or more sides, or a circular shape.

[0143] In addition, the first heat exchanger element and the second heat exchanger element can be manufactured by the same injection molding process (common injection molding process), thereby being able to reduce the number of molds, reduce costs, and improve processing convenience.

[0144] In addition, in the case where the pitch of the partitioning ribs in the first heat exchanger element is different from the pitch of the partitioning ribs in the second heat exchanger element, the number, continuity, or discontinuity of the reinforcing ribs of the first heat exchanger element and the second heat exchanger element can be set differently as needed.

[0145] In one example, the second gate marks on the one side auxiliary rib and the other side auxiliary rib of the second heat exchange element are formed more densely than the first gate marks on the one side auxiliary rib and the other side auxiliary rib of the first heat exchange element. In this case, in the second heat exchange element, the second gate marks can be provided on the one side auxiliary rib and the other side auxiliary rib, and the first gate marks are not provided on the main rib.

[0146] In another example, the interval of the partition rib corresponding to the airflow passage with a large airflow speed is larger than the interval of the partition rib corresponding to the airflow passage with a small airflow speed.

[0147] In addition, in the above-described embodiments, examples of the heat exchange element in which the second gate marks are provided on at least two auxiliary ribs, or the second gate marks are provided on at least two auxiliary ribs and the first gate marks are provided on the main rib are exemplified. However, the present application is not limited thereto, and a third gate mark can also be provided on the frame. In this case, the plurality of gates through which the material is injected into the heat exchange sheet can include a third gate corresponding to the third gate mark. However, by providing the second gate marks on at least two auxiliary ribs only, or the second gate marks on at least two auxiliary ribs and the first gate marks on the main rib only, it is possible to suppress a situation in which the amount of waste in the injection channel and the like increases due to the provision of the third gate mark on the frame, for example. In addition, the third gate mark can be provided at another weak position. The third gate mark can not be provided in pairs, and can be provided as needed.

[0148] In addition, the first gate mark and the second gate mark can have a substantially circular outer shape, for example. In the case where the first gate mark is provided, the diameter of the first gate mark can be smaller than the width of the main rib in the first direction, can be the same as the width of the main rib in the first direction, or can be larger than the width of the main rib in the first direction (the first gate mark protrudes more toward the width direction of the main rib than the main rib). The diameter of the second gate mark can be smaller than the width of the auxiliary rib in the first direction, can be the same as the width of the auxiliary rib in the first direction, or can be larger than the width of the auxiliary rib in the first direction (the second gate mark protrudes more toward the width direction of the auxiliary rib than the auxiliary rib).

[0149] In addition, in the above-described embodiments, the ribs are formed across the entire length of the frame in the second direction, but the present application is not limited thereto, and the ribs can be formed across a part of the length of the frame in the second direction.

[0150] At least a part of the structure of the heat exchange element A as the first heat exchange element in the embodiment can be applied to the heat exchange element B as the second heat exchange element, or at least a part of the structure of the heat exchange element B as the first heat exchange element in the embodiment can be applied to the heat exchange element A as the second heat exchange element, without departing from the gist of the present application.

[0151] Further, in the above embodiment, the injection-molded frame is provided on the surface of one side of the heat exchange fin in the first heat exchange element or the second heat exchange element. Alternatively, another frame can be attached to the surface of the other side of the heat exchange fin.

[0152] The above specific embodiments of the present application are described in detail with reference to the accompanying drawings. However, it is to be understood that the above description is not intended to limit the present application in any way, and the technical features in each embodiment can be combined in any manner to constitute a new embodiment. Further, those skilled in the art can make various other modifications and changes to the present application as needed after understanding the above specific embodiments. These do not deviate from the essential content of the present application.

[0153] 1a, 1b frame

[0154] 2a, 2b heat exchange fin

[0155] 10a, 10b frame

[0156] 11a, 11b partition rib

[0157] 12a, 12b reinforcing rib

[0158] 100 heat exchange unit

[0159] 121a, 121b main reinforcing rib

[0160] 122a1, 122b1 one-side auxiliary reinforcing rib

[0161] 122a2, 122b2 other-side auxiliary reinforcing rib

[0162] A, B heat exchange element

[0163] G second gate mark

[0164] Q100 total heat exchanger

Claims

A heat exchange element comprising heat exchange fins and an injection molded frame provided on a surface of one side of the heat exchange fins, characterized in that, The frame comprises a frame edge, a partition rib extending in a first direction within the frame edge and partitioning adjacent fluid channels, and a reinforcing rib extending in a second direction intersecting the first direction within the frame edge and connected with the partition rib, the reinforcing rib having a main reinforcing rib located at a middle position of the frame and at least two auxiliary reinforcing ribs including a one-side auxiliary reinforcing rib and an opposite-side auxiliary reinforcing rib respectively located at two sides of the main reinforcing rib, N second gate marks being arranged on the one-side auxiliary reinforcing rib and the opposite-side auxiliary reinforcing rib respectively along the second direction, the second gate marks at two ends of the one-side auxiliary reinforcing rib being centrally symmetric to the second gate marks at two ends of the opposite-side auxiliary reinforcing rib with respect to the center of the frame. The heat exchange element according to claim 1, characterized in that The line connecting the nth second gate mark on the one-side auxiliary reinforcing rib from one side in the second direction and the nth second gate mark on the opposite-side auxiliary reinforcing rib from the other side in the second direction passes through the center of the frame, where N is greater than 2, n is greater than 1 and less than N. The heat exchange element according to claim 1, characterized in that In the thickness direction of the heat exchange sheet, the thickness of the reinforcing rib is less than the thickness of the partition rib. The heat exchange element according to claim 1, characterized in that The frame and the heat exchange sheet are integrally formed by injection molding. The heat exchange element according to claim 1, characterized in that The partition ribs are spaced apart in the second direction, the main reinforcing rib is continuously formed or discontinuously formed in the second direction and connects adjacent partition ribs with each other, and the auxiliary reinforcing rib is continuously formed or discontinuously formed in the second direction and connects adjacent partition ribs with each other. The heat exchange element according to claim 1, characterized in that When the width of the reinforcing rib in the first direction is d, the following relationship is satisfied: d≤5 mm. The heat exchange element according to claim 1, characterized in that First gate marks are provided on the main reinforcing rib. The heat exchange element according to claim 1, characterized in that Third gate marks are provided on the frame edge. The heat exchange element according to claim 1, characterized in that The one-side auxiliary reinforcing rib and the opposite-side auxiliary reinforcing rib each have multiple. The heat exchange element according to claim 1, characterized in that The at least two auxiliary reinforcing ribs have a connecting portion connecting the partition rib and the frame edge, and the second gate marks are provided on the connecting portion. The heat exchange element according to claim 1, characterized in that The width of the partition rib is less than or equal to 1.2 mm. A heat exchange unit includes first and second heat exchange elements alternately stacked and formed with airflow passages that are conducted in directions crossing each other in adjacent layers, characterized by At least one of the first heat exchange element and the second heat exchange element uses the heat exchange element according to any one of claims 1 to 11 and forms the air flow channel through multiple partition ribs. A humidifying core comprises first heat exchange elements and second heat exchange elements which are alternately stacked, characterized in that, One of the first heat exchange element and the second heat exchange element uses the heat exchange element according to any one of claims 1 to 11 and forms the air flow channel through multiple partition ribs, and the other of the first heat exchange element and the second heat exchange element uses the heat exchange element according to any one of claims 1 to 11 and forms the water flow channel through multiple partition ribs, the air flow channel and the water flow channel extending in directions intersecting each other in adjacent layers. An air treatment device, characterized in that The air treatment device comprises the heat exchange unit according to claim 12, and is one of a total heat exchanger with a heat exchange unit, a fresh air machine, and an air conditioner indoor unit; or the air treatment device comprises the humidifying core according to claim 13, and is a humidifying device with a humidifying core. A manufacturing method of a heat exchange element, the heat exchange element being the heat exchange element according to any one of claims 1 to 11, characterized by The heat exchange unit comprises: A process of placing the heat exchange sheet into an injection molding mold; and a process of injection molding the material onto the heat exchange fins via a plurality of gates including a plurality of second gates corresponding to the plurality of second gate marks.

Images