JP2019211175A - Multilayered heat exchanger and heat exchange unit with the multilayered heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multilayer heat exchanger capable of sufficiently exerting the effect of increasing the heat exchange efficiency due to the multilayer structure of the heat exchanger. A first flow path through which a first fluid flows, a second flow path through which a second fluid flows, and a second flow path so as to be in heat-conductive contact with a tube defining the first flow path. A plurality of penetrating portions which are fins arranged inside and which penetrate a heat exchange region (core) between the first fluid and the second fluid, are arranged at predetermined intervals in the second axial direction. In a multi-layer heat exchanger that forms a plurality of tube layers that are connected to each other, and communicates an interlayer region, which is a region between at least one pair of adjacent tube layers, and an external space without passing through other tube layers. By providing the portion, a new second fluid is mixed with the second fluid that has passed through the tube layer on the upstream side. [Selection diagram] Fig. 24

Description

  The present invention relates to a multilayer heat exchanger and a heat exchange unit including the multilayer heat exchanger. More specifically, the present invention relates to a multilayer heat exchanger that can achieve higher heat exchange efficiency and a heat exchange unit including the multilayer heat exchanger.

  For example, in various apparatuses such as a fuel cell cogeneration system, a gas heat pump, and an internal combustion engine for a vehicle, a heat exchanger is widely used as a device that performs heat exchange for exhaust heat utilization, heat dissipation, heat absorption, and the like. As a typical example of such a heat exchanger, for example, a radiator in which a large number of fins are joined to an outer wall of a tube through which a fluid flows inside at a predetermined interval can be cited (see, for example, Patent Document 1). ).

  In addition, for the purpose of improving heat exchange efficiency in a device incorporating a heat exchanger such as a radiator, a power device such as a fan that causes a fluid such as air to flow in a flow path defined by a member such as a duct, and a heat exchanger Are also widely known (for example, refer to Patent Document 2).

  By the way, since the heat radiation amount or heat absorption amount per unit area of the fin is limited, in order to increase the heat exchange efficiency in the heat exchanger having the above configuration, the heat exchanger is enlarged (larger area). Therefore, it is necessary to increase the area of the fin. However, there is a limit to the area that can be allocated to the intake and exhaust ports for inflow and outflow of outside air (air) in an apparatus incorporating a heat exchange unit.

  Therefore, in this technical field, a multi-layered heat is formed by arranging a tube through which a fluid flows in a plurality of planes and joining a large number of fins to the outer wall of the tube at predetermined intervals. Exchangers are widely used. Hereinafter, such a heat exchanger may be referred to as a “multilayer heat exchanger” (the heat exchanger described in Patent Document 1 is also an example of a multilayer heat exchanger).

  An example of the multilayer heat exchanger as described above is shown in FIGS. FIG. 1 is a schematic rear view of a multilayer heat exchanger 100 according to the related art observed from the downstream side in the air flow. However, for the sake of convenience, a part of the region where the fin 20f is in contact with the outer wall of the tube 10t that defines the flow path through which the fluid flows is omitted. FIG. 2 is a schematic right side view of the multilayer heat exchanger 100 shown in FIG. 1, and bending of the tube 10 t protruding from the fin 20 f (or the horizontal plate) disposed at the end on the right side. Portion 10c, first inlet 11 and first outlet 12 are depicted.

  As shown in FIGS. 1 and 2, the flow path defined by the tube 10t included in the multilayer heat exchanger 100 has a serpentine type structure. In the region where the fin 20f is in contact with the outer wall of the tube 10t, heat exchange is performed between a fluid (for example, water) that flows inside the tube 10t and a fluid (for example, air) that passes between the fins 20f. Is done. Hereinafter, the area may be referred to as a “heat exchange area” or a “core”. As shown in FIG. 2, in the heat exchange region of the multilayer heat exchanger 100, three layers of the tube 10t arranged in the same plane are formed. Specifically, as shown in FIG. 2, three planes A, B, and C from the upstream side (front side) to the downstream side (back side) in the air flow (indicated by white arrows) A tube 10t is arranged in each of the above. That is, the multilayer heat exchanger 100 is a multilayer heat exchanger having a three-layer structure.

  FIG. 3 is a schematic diagram showing an example of a flow path of a fluid flowing inside the tube 10t of the multilayer heat exchanger 100 shown in FIG. The thick solid line and the arrow with the thick solid line represent the flow of fluid at the bent portion 10c, the inlet 11 and the outlet 12 of the tube 10t disposed on the right side of the multilayer heat exchanger 100, and the thick dashed line represents the multilayer heat exchanger. The flow of the fluid in the bending part 10c of the tube 10t arrange | positioned at the left side surface side of 100 is represented. A black circle represents the flow of fluid flowing from the right side to the left side (from the front side to the back side of the paper) inside the tube 10t included in the heat exchange region (core). The open circle represents the flow of fluid flowing from the left side to the right side (from the back side toward the front side in the drawing) inside the tube 10t included in the heat exchange region (core).

  However, in the multilayer heat exchanger according to the related art having the above-described configuration, heat exchange with the fluid in the tube 10t is performed via the fin 20f in the vicinity of the layer (upstream layer) of the tube 10t arranged on the upstream side. The flowd air flows to the layer (downstream layer) of the tube 10t disposed on the downstream side. Therefore, compared with the temperature of the air which contacts the fin 20f in the vicinity of the upstream layer, the temperature of the air which contacts the fin 20f in the vicinity of the downstream layer becomes closer to the temperature of the fluid flowing from the inlet 11 of the tube 10t. That is, the temperature difference between the fluid flowing in the tube 10t in the downstream layer and the air in contact with the fin 20f is smaller than the temperature difference between the fluid flowing in the tube 10t in the upstream layer and the air in contact with the fin 20f. As a result, the heat exchange efficiency in the downstream layer is lower than the heat exchange efficiency in the upstream layer, and it may be difficult to achieve an increase in the heat exchange efficiency commensurate with the increase in fin area due to multilayering.

  Therefore, in this technical field, the flow path of the fluid flowing in from the inlet 11 of the tube 10t is different from the example shown in FIG. 3 from the downstream layer side to the upstream layer side (that is, the plane C in FIG. 2). It is known that the fluid flows in the order of plane B and plane A). Thereby, the temperature difference between the fluid flowing in the tube 10t in the downstream layer and the air in contact with the fins 20f tends to be smaller than the temperature difference between the fluid flowing in the tube 10t in the upstream layer and the air in contact with the fins 20f. Can be reduced.

  However, even with the above configuration, the temperature of the air in contact with the fins 20f in the vicinity of the downstream layer is lower than the temperature of the air in contact with the fins 20f in the vicinity of the upstream layer. There is no change in being closer to the temperature. That is, in the multilayer heat exchanger according to the prior art, the temperature of the air in contact with the fins 20f in the vicinity of the downstream layer is higher than the temperature of the air in contact with the fins 20f in the vicinity of the upstream layer. It cannot be prevented from becoming closer to the temperature of the fluid flowing into 10t.

JP 2004-198094 A JP 2017-150407 A

  As described above, in the multilayer heat exchanger according to the prior art, the temperature of the air in contact with the fin in the vicinity of the downstream layer is higher than the temperature of the air in contact with the fin in the vicinity of the upstream layer. It cannot be prevented from becoming closer to the temperature of the fluid flowing in. As a result, the temperature difference between the fluid flowing in the tube in the downstream layer and the air in contact with the fin is smaller than the temperature difference between the fluid flowing in the tube in the upstream layer and the air in contact with the fin, and heat exchange in the downstream layer The efficiency is lower than the heat exchange efficiency in the upstream layer. As described above, the multilayer heat exchanger according to the related art has a problem that the effect of increasing the heat exchange efficiency due to the multilayering is not sufficiently exhibited.

  That is, in this technical field, there is a demand for a multilayer heat exchanger that can sufficiently exhibit the effect of increasing the heat exchange efficiency due to the multilayered heat exchanger. That is, an object of the present invention is to provide a multilayer heat exchanger that can sufficiently exhibit the effect of increasing the heat exchange efficiency due to the multilayered heat exchanger.

  Therefore, as a result of earnest research, the present inventor has found that the outside air does not pass through other tube layers in the region between the tube layers arranged to form a plurality of layers in the heat exchange region of the multilayer heat exchanger. It has been found that the above-mentioned object can be achieved by providing a path through which water can flow.

  In view of the above, the multilayer heat exchanger according to the present invention (hereinafter sometimes referred to as “the present heat exchanger”) includes a first flow path, a second flow path, and fins. The first flow path is a flow path configured such that the first fluid flowing in from the first inflow port flows through the inside and flows out from the first outflow port. The second flow path is a flow path configured such that the second fluid flowing in from the second inflow port flows through the inside and flows out from the second outflow port. The fin is a plate-like member disposed in the second flow path so as to come into contact with a tube, which is a tubular member that defines the first flow path, so as to be able to conduct heat.

  The tube has a plurality of penetration portions that are portions that penetrate the second flow path in a direction that intersects both the second axial direction that is the axial direction of the second flow path and a plane that is parallel to the main surface of the fin. The plurality of penetrating portions are arranged such that a plurality of rows of penetrating portions arranged in a direction intersecting the second axis direction are formed in a cross section by a plane intersecting the first axis direction which is an axial direction of the plurality of penetrating portions. ing. As a result, a plurality of tube layers, which are layers constituted by a plurality of penetrating portions arranged in the same plane intersecting the second axis direction, are arranged at predetermined intervals in the second axis direction.

  With the above configuration, the heat exchanger of the present invention can perform heat exchange between the first fluid and the second fluid.

  Furthermore, in the heat exchanger according to the present invention, a communication portion is formed in the second member that is a member that defines the second flow path. The communicating portion passes through an interlayer region that is a region between at least one set of adjacent tube layers among a plurality of tube layers and an external space that is a space outside the second flow path without passing through another tube layer. At least one opening configured to communicate.

  The multilayer heat exchange unit device according to the present invention (hereinafter sometimes referred to as “the present heat exchange unit”) includes the above-described present heat exchanger and the first heat exchanger of the present invention. And a power unit configured to flow the first fluid in a predetermined direction inside the flow path.

  As described above, the heat exchanger according to the present invention includes a communication portion that is at least one opening configured to communicate between the interlayer region and the external space without passing through another tube layer. Therefore, the downstream tube layer of the pair of tube layers sandwiching the interlayer region includes not only the air that has undergone heat exchange in the upstream tube layer but also the outside (without passing through other tube layers). New air entering the space is also supplied. As a result, the temperature of the air in contact with the fin in the tube layer on the downstream side is closer to the temperature of the fluid flowing into the tube from the introduction portion than the temperature of the air in contact with the fin in the vicinity of the tube layer on the upstream side. Can be reduced.

  In other words, according to the heat exchanger of the present invention, the temperature difference between the fluid flowing in the tube in the vicinity of the tube layer on the downstream side and the air in contact with the fin causes the fluid and fin to flow in the tube in the vicinity of the upstream tube layer. The problem of becoming smaller than the temperature difference with the air in contact with the air is reduced. In addition, the same effect as described above can be achieved in the heat exchange unit of the present invention including the heat exchanger of the present invention.

  As described above, according to the present invention, it is possible to provide a multilayer heat exchanger that can sufficiently exhibit the effect of increasing the heat exchange efficiency due to the multi-layered heat exchanger as compared with the prior art. Other objects, other features, and attendant advantages of the present invention will be readily understood from the description of each embodiment of the present invention described with reference to the following drawings.

It is a typical back view at the time of observing the multilayer heat exchanger which concerns on a prior art from the downstream in the flow of air. It is a typical right view of the multilayer heat exchanger shown in FIG. It is a schematic diagram which shows an example of the flow path of the fluid which flows into the inside of the pipe | tube of the multilayer heat exchanger shown in FIG. It is a schematic diagram which shows the specific example of a structure of the 1st flow path of the multilayer heat exchanger (1st heat exchanger) which concerns on the 1st embodiment of this invention. It is a schematic diagram which shows the flow of the 2nd fluid in an example of the multilayer heat exchanger based on the prior art comprised as a heat radiator. It is a schematic diagram which shows the flow of the 2nd fluid in an example of the 1st heat exchanger comprised as a heat radiator. It is a schematic diagram in the case of observing one tube layer constituting the cross flow type multilayer heat exchanger from the second inlet side. When one tube layer in an example of the multilayer heat exchanger (second heat exchanger) according to the second embodiment of the present invention configured as a cross flow type multilayer heat exchanger is observed from the second inlet side. It is a schematic diagram. In the example of the multilayer heat exchanger (third heat exchanger) according to the third embodiment of the present invention configured as a cross flow type multilayer heat exchanger, the heat exchange region is both in the first axial direction and the second axial direction. It is a schematic diagram at the time of observing from the direction orthogonal to. In the example of the multilayer heat exchanger (fourth heat exchanger) according to the fourth embodiment of the present invention configured as a cross flow type multilayer heat exchanger, the heat exchange region is both in the first axial direction and the second axial direction. It is a schematic diagram at the time of observing from the direction orthogonal to. In one example of the multilayer heat exchanger (fifth heat exchanger) according to the fifth embodiment of the present invention configured as a cross flow type multilayer heat exchanger, (a) the heat exchange region is defined as the first axis direction and the second axis. It is the schematic diagram at the time of observing from the direction orthogonal to both of directions, and (b) The schematic diagram at the time of observing from the 2nd inflow port side. (A) Schematic when the heat exchange region in another example of the fifth heat exchanger configured as a cross flow type multilayer heat exchanger is observed from a direction orthogonal to both the first axial direction and the second axial direction It is a schematic diagram in the case of observing from the figure and (b) 2nd inflow port side. It is a typical right view which shows an example of the structure by which this invention heat exchanger is attached to the outer surface of the housing | casing of an apparatus. It is a typical right view which shows an example of the structure by which this invention heat exchanger is integrated in the inside of the housing | casing of an apparatus, and the new inlet for a communication part is added. It is typical sectional drawing which shows one example of a structure of the multilayer heat exchanger (6th heat exchanger) which concerns on the 6th embodiment of this invention. It is typical sectional drawing which shows another example of a structure of a 6th heat exchanger. It is typical sectional drawing which shows one example of a structure of the multilayer heat exchanger (7th heat exchanger) which concerns on the 7th embodiment of this invention. It is typical sectional drawing which shows one example of a structure of the multilayer heat exchanger (8th heat exchanger) which concerns on the 8th embodiment of this invention. It is typical sectional drawing which shows one example of a structure of the multilayer heat exchanger (9th heat exchanger) which concerns on the 9th embodiment of this invention. It is typical sectional drawing which shows one example of a structure of the multilayer heat exchanger (10th heat exchanger) which concerns on the 10th embodiment of this invention. It is typical sectional drawing which shows an example of a structure of the heat exchange unit which concerns on a prior art provided with the multilayer heat exchanger which concerns on a prior art. It is typical sectional drawing which shows an example of a structure of the heat exchange unit (this invention unit) which concerns on this invention provided with an 8th heat exchanger instead of the multilayer heat exchanger which concerns on a prior art. It is typical sectional drawing which shows an example of a structure of this invention unit provided with a 9th heat exchanger instead of the multilayer heat exchanger which concerns on a prior art. It is typical sectional drawing which shows an example of a structure of this invention unit provided with a 10th heat exchanger instead of the multilayer heat exchanger which concerns on a prior art.

<< First Embodiment >>
Hereinafter, a multilayer heat exchanger according to a first embodiment of the present invention (hereinafter may be referred to as “first heat exchanger”) will be described with reference to the drawings.

<Constitution>
The first heat exchanger includes a first flow path, a second flow path, and fins. The first flow path is a flow path configured such that the first fluid flowing in from the first inflow port flows through the inside and flows out from the first outflow port. The second flow path is a flow path configured such that the second fluid flowing in from the second inflow port flows through the inside and flows out from the second outflow port. The fin is a plate-like member disposed in the second flow path so as to come into contact with a tube, which is a tubular member that defines the first flow path, so as to be able to conduct heat.

  The tube that defines the first flow path is formed of a material having high thermal conductivity such as various metals such as aluminum, copper, and iron (including stainless steel). The inner diameter, wall thickness, and structure of the tube can be appropriately selected according to various conditions such as the viscosity, flow rate, pressure, and temperature of the first fluid assumed in the application of the first heat exchanger, for example. Specific examples of the structure of the tube include structures such as a lock seam (winding) type, a butt weld (butt welding on both sides) type, and a seamless (seamless drawn pipe) type.

  Further, the overall structure of the first flow path is not particularly limited as long as it can achieve a configuration as a multilayer heat exchanger as will be described in detail later. For example, it may be a parallel flow type or a serpentine type. There may be. In the former case, for example, as shown in FIG. 4 (a), the first fluid from the first inflow port 11 is a member that divides the first fluid into the plurality of tubes 10t, and the first fluid from the plurality of tubes 10t. A joining member 14 that is a member for joining one fluid to the first outlet 12 is provided on each of the upstream side and the downstream side of the plurality of tubes 10t. Specific examples of the flow dividing member 13 and the merging member 14 include a header and a manifold. Moreover, the connection method of such the flow dividing member 13 and the confluence | merging member 14, and the some tube 10t can be suitably selected from a well-known method in the said technical field, such as welding, for example.

  On the other hand, in the latter case, for example, as shown in FIG. 4B, the connection member 15, which is a member such as a bent tube that connects the plurality of tubes 10 t in series, is between the adjacent tubes 10 t in the first flow path 10. A so-called “serpentine type” first flow path 10 is formed. The connection method between the plurality of tubes 10t constituting the serpentine-type first flow path 10 and the connection member 15 can be appropriately selected from methods well known in the art, such as welding. Alternatively, as in the example illustrated in FIG. 1 and the like, the serpentine-type first flow path 10 may be configured by integrally forming the tube 10t so as to include the bent portion 10c.

  In any structure, the first fluid can be caused to flow through the first flow path at a predetermined flow rate by a power device such as a pump. In FIG. 4, a single layer structure in which the first flow path is arranged in one plane is illustrated for the purpose of facilitating understanding of the difference in the structure of the first flow path as a whole. As described above, the heat exchanger according to the present invention is a multilayer heat exchanger.

  The inner diameter, wall thickness, and material of the member that defines the second flow path are appropriately selected according to various conditions such as the viscosity, flow rate, pressure, and temperature of the second fluid assumed in the application of the first heat exchanger, for example. be able to. The second flow path is a region where heat exchange is performed between the first fluid flowing inside the tube and the second fluid passing between the fins that are in contact with the outer wall of the tube so as to allow heat conduction. The second fluid is configured to pass through the region (core).

  The shape, size, and structure of the fins can be appropriately selected according to various conditions such as the viscosity, flow rate, pressure, and temperature of the second fluid assumed in the application of the first heat exchanger, for example. The specific fin structure may be, for example, a plate fin type or a corrugated type. The contact form between the tube and the fin can also be appropriately selected according to various conditions such as the viscosity, flow rate, pressure, and temperature of the second fluid assumed in the application of the first heat exchanger. For example, the tube and the fin may be merely in contact with each other, may be bonded by, for example, soldering and brazing, or may be integrally formed. Furthermore, the tube and the fin may be press-contacted by expanding the tube inserted through the through-hole formed in the fin by internal pressure. Furthermore, the fin is formed of a material having a high thermal conductivity, such as various metals such as aluminum, copper, and iron (including stainless steel).

  The tube has a plurality of penetration portions that are portions that penetrate the second flow path in a direction that intersects both the second axial direction that is the axial direction of the second flow path and a plane that is parallel to the main surface of the fin. In other words, the second axial direction is a direction parallel to the direction in which the second fluid flows from the second inlet to the second outlet in the second flow path. Accordingly, the penetrating portion extends in a direction intersecting both the direction in which the second fluid flows in the second flow path and the main surface of the fin. That is, in the first heat exchanger, the direction in which the first fluid flows in the inside of the through portion (first axial direction) and the direction in which the second fluid flows in the second flow path (second axial direction) are not parallel to each other. It is a heat exchanger (hereinafter, sometimes collectively referred to as a “cross-flow type heat exchanger”). Typically, the first heat exchanger is a cross flow type heat exchanger in which the first axial direction and the second axial direction are orthogonal to each other.

  Note that the second flow path typically includes a pair of plates (horizontal plates) provided so as to intersect the penetrating portion at both ends of the penetrating portion, for example, for the purpose of maintaining the interval between the plurality of penetrating portions. And a pair of other plates that connect both ends of the horizontal plate. In any structure, the second fluid can be caused to flow through the second flow path at a predetermined flow rate by a power device such as a fan and a blower.

  The plurality of penetrating portions are arranged so that a plurality of rows of penetrating portions arranged in a direction intersecting the second axis direction in a cross section by a plane intersecting the first axis direction which is an axial direction of the plurality of penetrating portions are configured. Yes. In other words, the first axial direction is a direction parallel to the direction in which the first fluid flows in the penetrating portion of the first flow path. Thereby, a plurality of tube layers, which are layers constituted by a plurality of penetrating portions arranged in the same plane intersecting the second axis direction, are arranged at predetermined intervals in the second axis direction.

  As described above, the tube layer is a layer constituted by a plurality of penetrating portions arranged in the same plane intersecting the second axis direction. Here, “in the same plane” does not mean that the axes of a plurality of penetrating portions constituting one tube layer are necessarily completely in the same plane. For example, one tube layer is constituted. The axes of the plurality of penetrating portions may be shifted to some extent in the second axis direction. Furthermore, each tube layer does not necessarily need to be constituted by a plurality of penetrating portions arranged in one plane, and may be constituted by a plurality of penetrating portions arranged in a plurality of planes. As an example of such a tube layer, the tube layer etc. which were comprised by the multilayer heat exchanger, etc. can be mentioned, for example. The size (area), thickness (depth) and number of the tube layers provided in the heat exchanger of the present invention are the heat exchange efficiency required for the heat exchanger of the present invention and the installation space allowed for the heat exchanger of the present invention. It can be appropriately determined according to various conditions such as pressure loss.

  By the above, the 1st heat exchanger is constituted as a multilayer heat exchanger, and can perform heat exchange between the 1st fluid and the 2nd fluid. Note that either the first fluid or the second fluid may be at a higher temperature. In other words, the first heat exchanger may cool the first fluid with the second fluid, or may cool the second fluid with the first fluid. When a liquid is employed as one of the first fluid and the second fluid, the first fluid is a liquid (for example, water) from the viewpoint of reducing the possibility of high pressure loss. The fluid is preferably a gas (for example, air).

  By the way, in the multilayer heat exchanger according to the related art having the same configuration as described above, since the second fluid flows only through the second flow path, the second fluid flowing into the second flow path from the second inflow port. The two fluids flow out from the second outlet after sequentially passing through the heat exchange region from the upstream side to the downstream side. Therefore, as described above, the tube layer in which the second fluid heat-exchanged with the fluid flowing through the inside of the through portion via the fins in the vicinity of the tube layer (upstream layer) disposed on the upstream side is disposed on the downstream side. (Downstream). Therefore, compared to the temperature of the second fluid in the vicinity of the upstream layer, the temperature of the second fluid in the vicinity of the downstream layer becomes closer to the temperature of the first fluid flowing into the first flow path from the first inlet. That is, the temperature difference between the first fluid and the second fluid in the downstream layer is smaller than the temperature difference between the first fluid and the second fluid in the upstream layer. As a result, the heat exchange efficiency in the downstream layer is lower than the heat exchange efficiency in the upstream layer, and it may be difficult to achieve an increase in the heat exchange efficiency commensurate with the increase in fin area due to multilayering.

  For example, FIG. 5 illustrates a second example of a multilayer heat exchanger according to the related art configured as a radiator that cools water (hot water or hot water) as a first fluid with air (outside air) as a second fluid. It is a schematic diagram which shows the flow of a fluid. The heat exchanger has a configuration similar to that of the multilayer heat exchanger 100 shown in FIGS. 1 to 3. Therefore, since the second fluid flows only through the second flow path, it flows into the second flow path 20 from the second inlet 21 (as indicated by the white arrow 31 on the right side of the drawing). The second fluid that has passed through the heat exchange region sequentially from the upstream side to the downstream side flows out from the second outlet 22 (as indicated by the black arrow 34 on the left side toward the paper surface).

  More specifically, the second fluid 31 that has flowed into the second flow path 20 from the second inlet 21 has fins 20f in the vicinity of the tube layer A constituted by the penetrating portion of the tube 10t arranged on the most upstream side. The heat energy is received by heat exchange with the fluid flowing through the inside of the through portion. As a result, the temperature of the second fluid 32 after passing through the vicinity of the tube layer A becomes higher than the temperature of the second fluid 31 before passing through the vicinity of the tube layer A. The second fluid 32 flows to the adjacent tube layer B on the downstream side. For this reason, the heat exchange efficiency between the first fluid and the second fluid in the downstream tube layer B is lower than the heat exchange efficiency in the upstream tube layer A. Similarly, the temperature of the second fluid 33 after passing through the vicinity of the tube layer B is higher than the temperature of the second fluid 32 before passing through the vicinity of the tube layer B. Therefore, the heat exchange efficiency between the first fluid and the second fluid in the tube layer C further downstream is lower than the heat exchange efficiency in the tube layer B upstream. Thus, in the multilayer heat exchanger according to the related art, it may be difficult to achieve an increase in heat exchange efficiency commensurate with an increase in fin area due to the multilayering.

  Therefore, in the first heat exchanger, a communication portion is formed in the second member that is a member that defines the second flow path. The communicating portion passes through an interlayer region that is a region between at least one set of adjacent tube layers among a plurality of tube layers and an external space that is a space outside the second flow path without passing through another tube layer. At least one opening configured to communicate.

  As long as it is possible to communicate between the interlayer region and the external space without passing through another tube layer as described above, the configuration of the communication portion is not particularly limited. For example, as described above, when the second flow path is constituted by a pair of plates that respectively connect both ends of a pair of horizontal plates, at least one opening (penetration) formed in at least one of these horizontal plates and plates A communicating part can be constituted as a hole. The size, shape and position of the opening formed as the communication portion also allows the second fluid to flow from the external space to the interlayer region at a flow rate sufficient to achieve the heat exchange efficiency required for the first heat exchanger. It is designed as appropriate so that it can flow in. For example, the opening formed as the communication portion may be one or more holes formed in the second member, one or more slits formed in the second member, or the second It may be an opening formed by removing a part of the member.

  For example, FIG. 6 shows the flow of the second fluid in an example of a first heat exchanger configured as a radiator that cools water (hot water or hot water) as the first fluid with air (outside air) as the second fluid. It is a schematic diagram which shows. The first heat exchanger also basically has the same configuration as the multilayer heat exchanger 100 shown in FIGS. 1 to 3. Therefore, like the multilayer heat exchanger according to the related art described above, the second fluid 31 that has flowed into the second flow path 20 from the second inlet 21 is caused by the penetrating portion of the tube 10t disposed on the most upstream side. Thermal energy is received by heat exchange with the fluid flowing through the inside of the penetrating portion via the fins 20f in the vicinity of the configured tube layer A. As a result, the temperature of the second fluid 32 after passing through the vicinity of the tube layer A becomes higher than the temperature of the second fluid 31 before passing through the vicinity of the tube layer A.

  However, as described above, in the first heat exchanger, the communication member that communicates the interlayer region and the external space without passing through another tube layer is a member that defines the second flow path. Is formed. In the example shown in FIG. 6, in the first heat exchanger 101, the communication portion 20 a that communicates the interlayer region and the external space without passing through another tube layer is a member that defines the second flow path 20. It is formed on a certain second member 20t. Accordingly, the new second fluid 30 flows from the external space into the interlayer region between the tube layer A and the tube layer B via the communication portion 20a. As a result, in addition to the second fluid 32 after passing through the vicinity of the tube layer A, the new second fluid 30 also flows to the tube layer B on the downstream side adjacent to the tube layer A. The temperature of the new second fluid 30 is lower than the temperature of the second fluid 32 after passing through the vicinity of the tube layer A. For this reason, the temperature of the 2nd fluid (32 + 30) which flows into the tube layer B is lower than the case where the communication part 20a is not provided. As a result, the heat exchange efficiency between the first fluid and the second fluid in the downstream tube layer B is higher than in the case where the communication portion 20a is not provided.

  On the other hand, the temperature of the second fluid 33 after passing through the vicinity of the tube layer B is lower than when the communication portion 20a is not provided. In addition, in the interlayer region between the tube layer B and the tube layer C, a new second fluid 30 that flows from the external space through the communication portion 20a flows into the interlayer region between the tube layer B and the tube layer B. Together with the second fluid 33 after passing through the vicinity, it flows to the tube layer C on the downstream side adjacent to the tube layer B. For this reason, the temperature of the 2nd fluid (33 + 30) which flows into the tube layer C is lower than the case where the communication part 20a is not provided. As a result, the heat exchange efficiency between the first fluid and the second fluid in the tube layer C on the downstream side is also higher than when the communication portion 20a is not provided. Thus, according to the 1st heat exchanger 101, it becomes easier to achieve the increase in the heat exchange efficiency commensurate with the increase in the area of the fin accompanying the increase in the number of layers.

  Note that the difference in the pattern of the arrows in FIGS. 5 and 6 referred to in the above description indicates the difference in the path through which the second fluid flowing through each part flows, and does not indicate the difference in temperature. Absent. Further, in the example shown in FIG. 6, the interlayer region between the tube layer A and the tube layer B and the tube layer B on both of the pair of plates (second member 20 t) respectively connecting both ends of the pair of horizontal plates. A communication portion 20a is formed in an interlayer region between the tube layer C and the tube layer C. However, the communication part 20a may be formed only on one side of the pair of plates (second member 20t), and the interlayer region between the tube layer A and the tube layer B and the tube layer B and the tube layer C. It may be formed only in any one of the interlayer regions between them.

<effect>
As described above, the first heat exchanger includes a communication portion that is at least one opening configured to communicate between the interlayer region and the external space without passing through another tube layer. Therefore, the downstream tube layer of the pair of tube layers sandwiching the interlayer region includes not only the air that has undergone heat exchange in the upstream tube layer but also the outside (without passing through other tube layers). New air entering the space is also supplied. As a result, the temperature of the air in contact with the fin in the tube layer on the downstream side is closer to the temperature of the fluid flowing into the tube from the introduction portion than the temperature of the air in contact with the fin in the vicinity of the tube layer on the upstream side. Can be reduced. That is, according to the first heat exchanger, it is possible to provide a multilayer heat exchanger that can sufficiently exhibit the effect of increasing the heat exchange efficiency due to the multilayered heat exchanger.

<< Second Embodiment >>
Hereinafter, a multilayer heat exchanger according to a second embodiment of the present invention (hereinafter may be referred to as a “second heat exchanger”) will be described with reference to the drawings. As described above with respect to the first heat exchanger, the configuration of the communication portion is not particularly limited as long as the interlayer region and the external space can be communicated without passing through another tube layer.

  However, the interlayer region that communicates with the external space via the communication portion is a part of the heat exchange region in which the fins are disposed so as to be in heat conduction with the tube in the second flow path. When the fin is configured so as to cover the entire cross section of the heat exchange region by the plane including the main surface of the fin, the heat exchange region including the interlayer region extends in a plane intersecting the first axis direction by the fin. Existing, laminated in the first axial direction, and divided into a plurality of independent regions. In the case where the fin has such a configuration, when an opening as a communication portion is formed on a surface intersecting the first axial direction of the second member, a new second flowing into the interlayer region from the external space via the communication portion. The fluid flows into a region (communication region) that communicates with the communication portion among the plurality of regions.

  However, since each of the plurality of regions included in the interlayer region is isolated by the fins, the new second fluid that has flowed into the communication region cannot flow into other regions. Therefore, the effect of increasing the heat exchange efficiency due to the addition of the new second fluid to the second fluid that has undergone heat exchange in the upstream tube layer is achieved only in the communication region, and the effect is sufficiently achieved in the other regions. Not achieved. As a result, there is a possibility that it may be difficult to sufficiently exhibit the effect of increasing the heat exchange efficiency due to the multilayered heat exchanger.

  For example, FIG. 7 is a schematic view when one tube layer constituting a cross flow type multilayer heat exchanger is observed from the second inlet side. In the example shown in FIG. 7, the fins are configured to extend over the entire cross section of the heat exchange region. In this case, when openings (as the communication portions 20a) are formed on the surfaces (left and right wall surfaces facing the paper surface) that intersect the first axis direction of the second member 20t, a plurality of regions of the interlayer regions divided by the fins 20f Among them, a new second fluid flows into a region communicating with the communicating portion (a communicating region located at the left and right ends toward the paper surface).

  However, since each of the plurality of regions included in the interlayer region is isolated by the fin 20f, the new second fluid that has flowed into the communication region cannot flow into other regions. Therefore, the effect of increasing the heat exchange efficiency due to the addition of the new second fluid to the second fluid that has undergone heat exchange in the upstream tube layer is achieved only in the communication region, and the effect is sufficiently achieved in the other regions. Not achieved. As a result, there is a possibility that it may be difficult to sufficiently exhibit the effect of increasing the heat exchange efficiency due to the multilayered heat exchanger.

<Constitution>
Therefore, the second heat exchanger is the first heat exchanger described above, and is formed to communicate either one or both ends of the interlayer region in the direction intersecting the first axial direction with the external space. A multi-layer heat exchanger in which the communication portion includes a first opening which is an open opening.

  As described above, in the heat exchange region including the interlayer region, the fins are arranged so that the plane parallel to the main surface of the fins intersects the penetrating portion of the tube. That is, the fins are arranged so as to extend in a direction intersecting the first axial direction, which is the axial direction of the tube penetration portion that defines the first flow path. In the second heat exchanger, the first opening as the communication portion is formed so as to communicate either one or both ends of the interlayer region in the direction intersecting the first axial direction and the external space as described above. ing. Accordingly, the new second fluid flowing from the external space through the first opening can spread along the fins to the interlayer region. As a result, even if the fin is configured to cover the entire cross section of the heat exchange region by the plane including the main surface of the fin, the effect of increasing the heat exchange efficiency due to the multilayered heat exchanger is sufficiently obtained. It can be demonstrated.

  For example, FIG. 8 is a schematic view when one tube layer in an example of a second heat exchanger configured as a cross flow type multilayer heat exchanger is observed from the second inlet side. Also in the example shown in FIG. 8, the fins 20 f are configured so as to cover the entire cross section of the heat exchange region, similarly to the example shown in FIG. 7. However, in the second heat exchanger, the first opening 20a1 (as the communication portion 20a) is formed so as to communicate both ends of the interlayer region in the direction intersecting the first axial direction and the external space. In other words, the first opening 20a1 is formed on a surface parallel to the first axis direction of the second member 20t (upper and lower wall surfaces as viewed in the drawing). Accordingly, the new second fluid flowing from the external space through the first opening 20a1 can spread along the fins 20f to the interlayer region. As a result, even when the fin 20f is configured to cover the entire cross section of the heat exchange region by a plane including the main surface of the fin 20f, the effect of increasing the heat exchange efficiency by the multilayered heat exchanger is achieved. Can fully demonstrate.

  In the example shown in FIG. 8, the first opening (as the communication portion 20a) corresponding to all of the plurality of regions of the interlayer region divided by the fin 20f is formed. However, as long as the second fluid can flow from the external space into the interlayer region at a flow rate sufficient to achieve the heat exchange efficiency required for the second heat exchanger, it does not necessarily correspond to all regions. The first opening (20a) need not be formed. For example, the first opening (20a) may be formed only in a part of the plurality of regions. In the example shown in FIG. 8, the first opening (20a) is formed on both surfaces parallel to the first axis direction of the second member 20t (upper and lower wall surfaces), and the fin 20f. A first opening (20a) corresponding to all of the plurality of regions of the interlayer region divided by is formed. However, as long as the second fluid can be allowed to flow from the external space into the interlayer region at a flow rate sufficient to achieve the heat exchange efficiency required for the second heat exchanger, the second member 20t is not necessarily provided. It is not necessary that the first opening (20a) is formed on both surfaces parallel to the first axis direction (upper and lower wall surfaces as viewed in the drawing). For example, the first opening (20a) is formed only on one side of the upper and lower wall surfaces. It may be formed. Further, the first opening may be a plurality of holes as shown in FIG. 8, one or more slits, or both or one of the upper and lower wall surfaces of the second member 20t may be removed. The opening part formed by this may be sufficient.

<effect>
As described above, in the second heat exchanger, the first opening is an opening formed so as to communicate either one or both ends of the interlayer region in the direction intersecting the first axial direction with the external space. The communication part includes. As a result, even if the fin is configured to cover the entire cross section of the heat exchange region by the plane including the main surface of the fin, the effect of increasing the heat exchange efficiency due to the multi-layered heat exchanger is sufficiently obtained. It can be demonstrated.

<< Third Embodiment >>
Hereinafter, a multilayer heat exchanger according to a third embodiment of the present invention (hereinafter may be referred to as a “third heat exchanger”) will be described with reference to the drawings. As described above with respect to the second heat exchanger, a plane in which at least a part of the heat exchange region intersects with the first axial direction by the fins disposed so as to be in heat conduction with the tube in the second flow path. It extends in, is laminated in the first axial direction, and is divided into a plurality of regions independent of each other. As a result, it may be difficult for the new second fluid that has flowed into the interlayer region from the external space via the communicating portion to spread over the entire interlayer region.

<Constitution>
Therefore, the third heat exchanger is the first heat exchanger or the second heat exchanger described above, and a through-hole that connects one space adjacent to the other and the other space across the fin is formed in the fin. It is a multilayer heat exchanger.

  The size, shape, and frequency of the through holes (the number of through holes existing per unit area of the fin) are, for example, the pressure when the second fluid flows from one space adjacent to the other through the fin to the other space. It can be determined as appropriate based on the loss and the fin area required to achieve the heat exchange efficiency required for the third heat exchanger.

  For example, FIG. 9 shows a case where a heat exchange region in an example of a third heat exchanger configured as a cross flow type multilayer heat exchanger is observed from a direction orthogonal to both the first axial direction and the second axial direction. It is a schematic diagram. In other words, FIG. 9 is a schematic diagram when the heat exchange region is observed from the top surface or the bottom surface, not from the front surface or the back surface. In the example illustrated in FIG. 9, the second fluid 30 that has flowed into the second flow path from the lower second inlet 21 toward the paper surface includes three tube layers including the tubes 10 t and fins 20 f. After passing through the heat exchange region, the air flows from the upper second outlet 22 toward the paper surface. Also in the example shown in FIG. 9, the fins 20 f are configured so as to cover the entire cross section of the heat exchange region, similarly to the examples shown in FIGS. 7 and 8.

  However, in the third heat exchanger, as described above, the through holes 20fa that connect the one space adjacent to the other space across the fin 20f and the other space are formed in the fin 20f. Thereby, the new second fluid that has flowed into the interlayer region from the external space via the communication portion (not shown) can easily spread over the entire interlayer region via the through hole 20fa. As a result, according to the third heat exchanger, the effect of increasing the heat exchange efficiency due to the multilayered heat exchanger can be more fully exhibited.

  In the example shown in FIG. 9, the fins 20 f in which the through holes 20 fa are formed in the portions included in the interlayer region and the fins 20 f in which the through holes 20 fa are formed in the portions included in the tube layer are alternately arranged. ing. However, the arrangement of the through holes 20fa in the fins 20f is not limited to the above. For example, the through holes 20fa may be formed at random positions of the fins 20f. Or all the through-holes 20fa may be formed in the part contained in the interlayer area | region of the fin 20f, and all the through-holes 20fa may be formed in the part contained in the tube layer of the fin 20f.

<effect>
In the third heat exchanger, as described above, a through hole is formed in the fin so as to communicate between one space adjacent to the other and the other space with the fin interposed therebetween. Thereby, the new 2nd fluid which flowed into the interlayer area via the communicating part from external space can spread easily to the whole interlayer area. As a result, according to the third heat exchanger, the effect of increasing the heat exchange efficiency due to the multilayered heat exchanger can be more fully exhibited.

<< 4th Embodiment >>
Hereinafter, a multilayer heat exchanger according to a fourth embodiment of the present invention (hereinafter may be referred to as a “fourth heat exchanger”) will be described with reference to the drawings. As described above with respect to the third heat exchanger, by forming a through hole in the fin that connects one space adjacent to the other and the other space across the fin, the external space can be connected to the interlayer region via the communication portion. The new second fluid that has flowed in can be easily spread throughout the interlayer region. As a result, the effect of increasing the heat exchange efficiency due to the multilayered heat exchanger can be more fully exhibited.

  The size, shape, and frequency of the through holes (the number of through holes existing per unit area of the fin) are the pressure when the second fluid flows from one space adjacent to the other through the fin to the other space. It can be determined as appropriate based on the loss and the fin area required to achieve the heat exchange efficiency required for the third heat exchanger.

<Constitution>
Therefore, the fourth heat exchanger is the first heat exchanger or the second heat exchanger described above, and a through space, which is a continuous space parallel to the tube layer and having no fins, is in the interlayer region. It is an existing multilayer heat exchanger. In the fourth heat exchanger, a plurality of penetrating portions constituting one tube layer of a pair of tube layers sandwiching an interlayer region, fins in contact with heat conduction, and a plurality of penetrating portions constituting the other tube layer The fins that are in thermal contact with the part are configured as discrete discrete fins.

  The size (thickness or depth) of the penetrating space in the second axial direction is such that the gap between the pair of tube layers sandwiching the interlayer region and the fins that are in contact with the plurality of penetrating portions constituting each tube layer so as to conduct heat. It is determined by the size in the second axis direction. The size of the penetrating space in the second axial direction is, for example, a fin required to achieve a pressure loss when the second fluid flows through the penetrating space and a heat exchange efficiency required for the fourth heat exchanger. It can be determined as appropriate based on the area and the like.

  For example, FIG. 10 shows a case where a heat exchange region in an example of a fourth heat exchanger configured as a cross flow type multilayer heat exchanger is observed from a direction orthogonal to both the first axial direction and the second axial direction. It is a schematic diagram. In other words, FIG. 10 is a schematic diagram when the heat exchange region is observed from the top surface or the bottom surface, not from the front surface or the back surface, as in FIG. 9 described above. Also in the example illustrated in FIG. 10, the second fluid 30 that has flowed into the second flow path from the lower second inlet 21 toward the paper surface includes three tube layers including the tubes 10 t and the fins 20 f. After passing through the heat exchange region, the air flows from the upper second outlet 22 toward the paper surface.

  However, in the fourth heat exchanger, as described above, the fin 20f that comes into contact with a plurality of through portions of the tube 10t that constitutes one of the tube layers sandwiching the interlayer region so as to conduct heat. And the plurality of penetrating portions of the tube 10t constituting the other tube layer and the fins 20f that are in contact with each other so as to conduct heat are configured as discrete discrete fins. As a result, a through space 20fs (region surrounded by a broken line) that is a continuous space that is parallel to the tube layer and does not have the fins 20f exists in the interlayer region. Therefore, in the fourth heat exchanger, the new second fluid that has flowed into the interlayer region from the external space via the communication portion (not shown) easily spreads throughout the interlayer region via the through space 20fs. be able to. As a result, according to the fourth heat exchanger, the effect of increasing the heat exchange efficiency due to the multi-layered heat exchanger can be exhibited more sufficiently.

  In the example shown in FIG. 10, through spaces 20fs are formed in all interlayer regions included in the heat exchange region. However, the arrangement of the through space 20fs is not limited to the above. For example, the through space 20fs may be formed only in a part of the interlayer region included in the heat exchange region.

<effect>
In the fourth heat exchanger, as described above, the fins and the other tube layer which are in contact with a plurality of through portions constituting one tube layer of one set of the tube layers sandwiching the interlayer region so as to be capable of heat conduction are provided. The plurality of penetrating portions constituting the fins and the fins that are in contact with each other so as to conduct heat are configured as discrete discrete fins. As a result, there is a through space in the interlayer region that is a continuous space parallel to the tube layer and having no fins. Thereby, the new 2nd fluid which flowed into the interlayer area via the communicating part from external space can spread easily by the whole interlayer area. As a result, according to the fourth heat exchanger, the effect of increasing the heat exchange efficiency due to the multi-layered heat exchanger can be exhibited more sufficiently.

<< 5th Embodiment >>
Hereinafter, a multilayer heat exchanger according to a fifth embodiment of the present invention (hereinafter, may be referred to as a “fifth heat exchanger”) will be described with reference to the drawings. As described above, in the third heat exchanger, by forming a through hole in the fin that connects one space adjacent to the other with the fin interposed therebetween, the interlayer region from the external space via the communication portion is formed. It is possible to easily spread the new second fluid that has flowed into the entire interlayer region. In the fourth heat exchanger, a through space that is a continuous space that is parallel to the tube layer and does not have fins is formed in the interlayer region, so that the external space can be connected to the interlayer region via the communicating portion. The new second fluid that has flowed in can be easily spread throughout the interlayer region. As a result, in both the third heat exchanger and the fourth heat exchanger, the effect of increasing the heat exchange efficiency due to the multilayered heat exchanger can be more fully exhibited.

  By the way, when the through hole is formed in the fin as described above and when the through space is formed in the interlayer region, an opening as a communication portion is formed on the surface intersecting the first axis direction of the second member. Even if formed, the new second fluid that has flowed into the interlayer region can be easily spread throughout the interlayer region. Therefore, the effect of increasing the heat exchange efficiency due to the multilayered heat exchanger can be more fully exhibited.

<Constitution>
Therefore, the fifth heat exchanger is the third heat exchanger or the fourth heat exchanger described above, and the communication portion is connected to either one or both ends of the interlayer region in a direction parallel to the first axial direction. The multilayer heat exchanger includes a second opening which is an opening formed so as to communicate with an external space.

  As described above, the fifth heat exchanger is the third heat exchanger or the fourth heat exchanger described above. Therefore, a through-hole that communicates between one space adjacent to the other and the other space is formed in the fin, or there is a through space that is a continuous space that is parallel to the tube layer and does not have a fin. It is formed in the interlayer region. In addition to these, the communication part included in the fifth heat exchanger is an opening formed so as to communicate either one or both ends of the interlayer region in the direction parallel to the first axial direction and the external space. Includes a second opening. In other words, in the 5th heat exchanger, the 2nd opening as a communicating part is formed in the field which intersects the 1st axis direction of the 2nd member. Accordingly, the first opening is an opening formed so as to communicate the outer space with either one or both ends of the interlayer region in the direction intersecting the first axial direction as in the second heat exchanger described above. Even if the communication portion does not include, the new second fluid that has flowed into the interlayer region can be easily distributed throughout the interlayer region through the through hole and / or the through space. Therefore, the effect of increasing the heat exchange efficiency due to the multilayered heat exchanger can be more reliably exhibited.

  For example, FIG. 11A shows a heat exchange region in an example of a fifth heat exchanger configured as a cross flow type multilayer heat exchanger from a direction orthogonal to both the first axial direction and the second axial direction. It is a schematic diagram in the case of observing. In other words, FIG. 11 is a schematic view in the case where the heat exchange region is observed from the top surface or the bottom surface, not from the front surface or the back surface, similarly to FIGS. 9 and 10 described above. Also in the example shown in FIG. 11 (a), the second fluid 30 that has flowed into the second flow path from the second inflow port 21 on the lower side toward the paper surface has three tube layers and fins made of the tube 10t. After passing through the heat exchange region including 20f, the air flows from the upper second outlet 22 toward the paper surface.

  In addition, an example of the 5th heat exchanger shown to (a) of FIG. 11 is the 4th heat exchanger mentioned above. Accordingly, in the fifth heat exchanger as well, as in the fourth heat exchanger, heat conduction can be performed with a plurality of through portions of the tube 10t constituting one tube layer of the pair of tube layers sandwiching the interlayer region. The fins 20f that are in contact with each other and the plurality of through portions of the tube 10t that constitute the other tube layer and the fins 20f that are in contact with each other so as to be able to conduct heat are configured as discrete discrete fins. As a result, a through space 20fs (region surrounded by a broken line) that is a continuous space that is parallel to the tube layer and does not have the fins 20f exists in the interlayer region. Accordingly, also in the fifth heat exchanger, as in the fourth heat exchanger, the new second fluid that has flowed into the interlayer region from the external space via the communication portion passes through the through space 20fs and the entire interlayer region. Can spread more easily.

  On the other hand, FIG. 11B is a schematic diagram when one tube layer in the above example of the fifth heat exchanger is observed from the second inlet side. Also in the example shown in FIG. 11B, as in the example shown in FIG. 8, both ends of the interlayer region in the direction intersecting the first axis direction and the external space are communicated (as the communication part 20a). ) A first opening 20a1 is formed. In other words, the first opening 20a1 is formed on a surface parallel to the first axis direction of the second member 20t (upper and lower wall surfaces as viewed in the drawing). Accordingly, the new second fluid flowing from the external space through the first opening 20a1 can spread along the fins 20f to the interlayer region.

  In addition to the above, in the example shown in FIGS. 11A and 11B, the opening is formed to communicate both ends of the interlayer region in the direction parallel to the first axis direction and the external space. 2 openings 20a2 are included. In other words, the second opening 20a2 (as the communication portion 20a) is formed on a surface that intersects the first axis direction of the second member 20t. Therefore, even if the communication portion does not include the first opening 20a1 described above, the new second fluid that has flowed into the interlayer region can easily reach the entire interlayer region through the through space 20fs. it can. As a result, according to the fifth heat exchanger, the effect of increasing the heat exchange efficiency due to the multi-layered heat exchanger can be more fully exhibited.

  In the example shown in FIG. 11, the communication portion includes the first opening 20a1 described above. That is, in FIG. 11, both the first opening 20a1 and the second opening 20a2 formed in the second member 20t are formed in the second member 20t. However, in the fifth heat exchanger, the first opening 20a1 is not an essential component, and the communication portion 20a may include only the second opening 20a2. In the example shown in FIG. 11, the through space 20fs is present in the interlayer region as in the fourth heat exchanger. However, in the fifth heat exchanger, the through space 20fs is not an indispensable component, and instead of the through space 20fs or in addition to the through space 20fs, one space adjacent to the fin 20f is communicated with the other space. A through-hole 20fa may be formed in the fin 20f.

  For example, FIG. 12 is a schematic diagram illustrating an example of a fifth heat exchanger that does not include the first opening and the communication portion. FIG. 12A shows the heat exchange region in another example of the fifth heat exchanger configured as a cross flow type multilayer heat exchanger from a direction orthogonal to both the first axial direction and the second axial direction. It is a schematic diagram in the case of observing. (B) of Drawing 12 is a mimetic diagram in the case where one tube layer in the above-mentioned other example of the 5th heat exchanger is observed from the 2nd inflow side. In the example shown in FIGS. 12A and 12B, the first opening is not formed, and only the second opening 20a2 is formed. However, in the fifth heat exchanger according to this example, the through hole 20fa is formed in the fin as in the third heat exchanger described above. Therefore, even if the communication portion does not include the first opening as in the example shown in FIG. 12, the new second fluid that has flowed into the interlayer region can be easily spread throughout the interlayer region. Therefore, even in such a configuration, the effect of increasing the heat exchange efficiency due to the multilayered heat exchanger can be more fully exhibited.

<effect>
As described above, in the fifth heat exchanger, as in the third heat exchanger or the fourth heat exchanger, the through hole is formed in the fin, or the through space is formed in the interlayer region. . In addition, in the fifth heat exchanger, the second opening, which is an opening formed so as to communicate either one or both ends of the interlayer region in the direction parallel to the first axial direction and the external space, is communicated. Part includes. As a result, regardless of the presence or absence of the first opening described above, the new second fluid that has flowed into the interlayer region from the external space via the communicating portion can easily spread over the entire interlayer region. As a result, according to the fifth heat exchanger, the effect of increasing the heat exchange efficiency due to the multilayered heat exchanger can be more fully exhibited.

<< 6th Embodiment >>
Hereinafter, a multilayer heat exchanger according to a sixth embodiment of the present invention (hereinafter may be referred to as a “sixth heat exchanger”) will be described with reference to the drawings. In the multilayer heat exchanger according to the present invention including the first heat exchanger to the fifth heat exchanger (the present heat exchanger), as described above, the interlayer region and the external space are connected with other tube layers. The communication part which is at least 1 opening comprised so that it may communicate without going through is provided. This communication part is formed in the 2nd member which is a member which demarcates a 2nd flow path, and can contain the 1st opening and / or 2nd opening which were mentioned above.

  Therefore, as long as the communication part is at least directly or indirectly exposed to the external space, the second fluid can flow into the interlayer region from the external space. For example, as shown in FIG. 13, the heat exchanger of the present invention (in this example, the fifth heat exchanger) is placed on the outer surface of the housing of a device 500 (for example, a fuel cell cogeneration system and a gas heat pump) in which the heat exchanger is incorporated. 105) is attached, and the second fluid (outlined) is passed through the second inlet 21 located on the front surface of the heat exchanger 105 of the present invention and the communication portion 20a (first opening 20a1 and second opening 20a2) located on the side surface. May be introduced inside.

  However, in a device in which a heat exchanger is incorporated (for example, a device such as a fuel cell cogeneration system), a heat exchanger is generally incorporated in the casing of the device. Specifically, for example, in the device, air (second fluid) flows into the heat exchanger from an air inlet formed in the rear panel of the housing, and the heat exchanger (and a power device such as a fan). After passing through, it is configured to flow out from an exhaust port formed in the front panel of the housing.

  On the other hand, reduction in size and weight is a problem common to various devices as well as devices incorporating a heat exchanger. Therefore, for example, as shown in FIG. 14, in addition to the inlet 510 corresponding to the second inlet 21 of the heat exchanger of the present invention (the fifth heat exchanger 105 in this example) incorporated in the apparatus 500. Actually, it is desirable to avoid providing a new intake port 520 and a new intake flow path 530 for the communication portion 20a (the first opening 20a1 and the second opening 20a2) in the casing of the apparatus 500. . As a result, the second fluid guided to the interlayer region via the communication portion 20a is also supplied from the second inlet 21 in the same manner as the second fluid guided to the tube layer located on the most upstream side. Is desirable.

<Constitution>
Therefore, the sixth heat exchanger is any one of the first heat exchanger to the fifth heat exchanger described above, and passes through the third inlet which is an opening formed as a part of the second inlet. It is a multilayer heat exchanger further provided with the 3rd channel which is the channel through which the 2nd fluid which flowed in from outside space flows inside, and flows out from a communicating part to an interlayer field.

  The specific configuration of the third flow path and the third inflow port is that the second fluid flows from the external space to the third flow path via the third inflow port that is an opening formed as a part of the second inflow port. There is no particular limitation as long as it can flow into the communication part. For example, a part of the space that communicates the most upstream tube layer and the second inlet is partitioned by some member to define the third flow path, and the upstream end of the third flow path is the first end. It may be configured as a three inlet. Alternatively, without being partitioned as described above, a space in which the tube layer located on the most upstream side and the second inlet are in communication with the third flow path forms a continuous space, and the second inlet and The 3rd inflow port may form the continuous opening.

  For example, FIG. 15 is a schematic cross-sectional view showing one example of the configuration of the sixth heat exchanger 106. The configuration shown in FIG. 15 is an example of a configuration corresponding to the former of the two examples described above, and a part of the space that communicates the tube layer A located on the most upstream side with the second inlet 21 is a partition member. The third flow path 23 is defined by being partitioned by 20s. In this example, the upstream end of the third flow path 23 is configured as the third inflow port 24. Thus, the second fluid guided to the interlayer region via the communication portion 20a can be supplied from the second inlet 21 in the same manner as the second fluid guided to the tube layer A located on the most upstream side. it can.

  FIG. 16 is a schematic cross-sectional view showing another example of the configuration of the sixth heat exchanger 106. The configuration shown in FIG. 16 is an example of a configuration corresponding to the latter of the two examples described above, and the third flow path is not partitioned as in the example shown in FIG. 15, and is located on the most upstream side. A space in which the tube layer A and the second inlet 21 communicate with each other and a third flow path form a continuous space, and the second inlet 21 and the third inlet 24 form a continuous opening. Yes. Even in such a configuration, the second fluid guided to the interlayer region via the communication portion 20a is sent from the second inlet 21 in the same manner as the second fluid guided to the tube layer A located on the most upstream side. Can be supplied.

<effect>
As described above, in the sixth heat exchanger, the third inlet that is an opening as an end portion on the opposite side to the communication portion of the flow path that guides the second fluid from the external space to the communication portion is the second heat inlet. It is not provided separately from the inlet, but is formed as a part of the second inlet. Furthermore, the sixth heat exchanger further includes a third flow path that is a flow path through which the second fluid flowing in from the external space through the third inflow flows and flows out from the communication portion to the interlayer region. Therefore, for example, as shown in FIG. 14, a new intake port and / or intake flow path for the communication portion provided in the sixth heat exchanger is added to the front surface of the housing of the apparatus in which the heat exchanger is incorporated. Without being provided, the second fluid guided to the interlayer region via the communication portion can be supplied from the second inlet, similarly to the second fluid guided to the tube layer located on the most upstream side. As a result, it is possible to contribute to reducing the size and weight of a device in which the sixth heat exchanger is incorporated (for example, a fuel cell cogeneration system and a gas heat pump).

<< 7th Embodiment >>
Hereinafter, a multilayer heat exchanger according to a seventh embodiment of the present invention (hereinafter may be referred to as a “seventh heat exchanger”) will be described with reference to the drawings. As described above, in the sixth heat exchanger, the third fluid inlet that is an opening formed as a part of the second fluid inlet and the second fluid flowing in from the external space through the third fluid inlet flow inside. A third flow path that is a flow path that flows out from the communication portion to the interlayer region is further provided. As a result, the second air that is guided to the interlayer region via the communication portion without providing a new air inlet and / or an air intake channel on the front surface of the casing of the apparatus in which the sixth heat exchanger is incorporated. The fluid can be supplied from the second inlet, similar to the second fluid that is directed to the tube layer located on the most upstream side.

  However, in the configuration in which a plurality of tube layers are arranged at intervals in the second axial direction in the space communicating from the second inlet as described above, a plurality of tubes from the second inlet to the second outlet are provided. In some cases, the second fluid intensively flows into the flow path exhibiting the lowest pressure loss among the flow paths. For example, in the example shown in FIG. 16, the following three channels can be listed as the channels through which the second fluid flowing in from the second inlet 21 reaches the second outlet 22. .

(1) a flow path through which the second fluid passes through all of the tube layers A to C;
(2) A flow path through which the second fluid flowing from the interlayer region between the tube layers A and B passes through the tube layers B and C, and (3) flowing from the interlayer region between the tube layers B and C A flow path through which the second fluid passes only through the tube layer C.

  The magnitude of pressure loss when the second fluid passes through the three flow paths (1) to (3) corresponds to the number of tube layers through which the second fluid passes. That is, in the channel (1), the number of tube layers is the largest and the pressure loss is the largest. On the other hand, in the flow path (3), the number of tube layers is the smallest and the pressure loss is the smallest. Moreover, in the flow path (2), both the number of tube layers and the pressure loss are intermediate between them.

  Therefore, for example, depending on the difference in the magnitude of pressure loss in each flow path and / or the flow rate of the second fluid in the second flow path, the second fluid flows into the flow path (3) exhibiting the lowest pressure loss. You may be over-concentrated. In this case, as described above, since the number of tube layers in the flow path (3) is the smallest, there is a possibility that the heat exchange efficiency of the entire heat exchanger may be reduced.

  In the example shown in FIG. 15, as described above, a part of the space communicating the tube layer A located on the most upstream side and the second inlet 21 is partitioned by the partition member 20 s, and the second inlet 21. A third flow path 23 that guides the second fluid from the communication portion 20a to the communication portion 20a is defined. As the flow path of the second fluid passing through the third flow path 23, the two flow paths (2) and (3) described above can be cited. Therefore, the second fluid tends to concentrate in the flow path (3) exhibiting a lower pressure loss than in the flow path (2) exhibiting a higher pressure loss. As a result, in the same manner as described above, for example, depending on the difference in the magnitude of the pressure loss in each flow path and / or the flow rate of the second fluid in the second flow path, the heat exchange efficiency as a whole heat exchanger decreases. It may lead to

<Constitution>
Therefore, the seventh heat exchanger is the sixth heat exchanger described above, and is a multilayer heat exchanger in which at least one third flow path is defined for each of the interlayer regions. In other words, a third flow path independently communicating from the second inlet to each interlayer region is provided for each interlayer region.

  For example, FIG. 17 is a schematic cross-sectional view showing one example of the configuration of the seventh heat exchanger 107. As shown in FIG. 17, a part of the space communicating the tube layer A located on the most upstream side and the second inflow port 21 is partitioned by a partition member 20s to define a third flow path 23. An upstream end of the flow path 23 is configured as a third inflow port 24. The set of the third flow path 23 and the third inflow port 24 is formed between the communication portion 20a for allowing the second fluid to flow into the interlayer region between the tube layers A and B and the tube layers B and C. One is provided in each of the communication portions 20a for allowing the second fluid to flow into the interlayer region.

  As a result, the second fluid once flowing into the third flow path 23 from any of the third inflow ports 24 cannot flow into the other third flow paths 23. It is reliably guided to the interlayer region corresponding to the third flow path 23 via the corresponding communication portion 20a. Therefore, as described above, the possibility that the second fluid is excessively concentrated in the flow path exhibiting the lowest pressure loss is reduced. As a result, it is possible to at least partially prevent a decrease in heat exchange efficiency of the heat exchanger as a whole.

<effect>
As described above, in the seventh heat exchanger, at least one third flow path is defined for each of the interlayer regions. Therefore, since the second fluid once flowing into the third flow path from any of the third inflow ports cannot flow into the other third flow paths, the communication portion corresponding to the third flow path is provided. Through the interlayer region corresponding to the third flow path. Therefore, as described above, the possibility that the second fluid is excessively concentrated in the flow path exhibiting the lowest pressure loss is reduced. As a result, it is possible to at least partially prevent a decrease in heat exchange efficiency of the heat exchanger as a whole.

<< Eighth Embodiment >>
Hereinafter, a multilayer heat exchanger according to an eighth embodiment of the present invention (hereinafter may be referred to as an “eighth heat exchanger”) will be described with reference to the drawings. As described above, in the heat exchanger of the present invention, the communication portion is formed in the second member that is a member that defines the second flow path. Typically, the communication portion is formed on the side surface of the region corresponding to the interlayer region of the cylindrical second member that defines the second flow path. Since the third flow path is a flow path that communicates such a communication portion and the third inlet, the third flow path and the third inlet are outside the tube layer included in the second flow path ( It is desirable that the second flow path be disposed outside the second flow path in the radial direction.

<Constitution>
Accordingly, the eighth heat exchanger is the sixth heat exchanger or the seventh heat exchanger described above, and the third flow path and the third inlet are in the projection view on the plane orthogonal to the second axial direction. It is a multilayer heat exchanger arrange | positioned on the outer side of a tube layer. In other words, in the eighth heat exchanger, the third flow path and the third inflow port are disposed outside the tube layer included in the second flow path (outside in the radial direction of the second flow path). Yes.

  For example, FIG. 18 is a schematic cross-sectional view showing one example of the configuration of the eighth heat exchanger. As shown in FIG. 18, in the eighth heat exchanger 108 shown in this example, outside the tube layer included in the second flow path (above and below the two dash-dot lines shown in the figure). ) Is provided with a third flow path 23 and a third inflow port 24.

<effect>
As described above, typically, the communication portion is formed on the side surface of the region corresponding to the interlayer region of the cylindrical second member that defines the second flow path. On the other hand, in the eighth heat exchanger, the third flow path and the third inflow port are disposed outside the tube layer in a projection view onto a plane orthogonal to the second axial direction. That is, the third flow path and the third inflow port are disposed outside the tube layer included in the second flow path (outside in the radial direction of the second flow path). Therefore, according to the eighth heat exchanger, as a flow path that connects the communication portion and the third inflow port without adding a special member or processing to a device in which the eighth heat exchanger is incorporated. The third flow path can be provided.

<< Ninth Embodiment >>
Hereinafter, a multilayer heat exchanger according to a ninth embodiment of the present invention (hereinafter may be referred to as a “ninth heat exchanger”) will be described with reference to the drawings. In the eighth heat exchanger, as described above, the third flow path and the third inflow port are arranged outside the tube layer in the projection view onto the plane orthogonal to the second axial direction. Thus, the third flow path is provided as a flow path that connects the communication portion and the third inflow port without adding any special member or processing to the apparatus in which the eighth heat exchanger is incorporated. can do.

  However, for example, as shown by the shaded portion in FIG. 18, the volume of the heat exchanger as a whole increases as the third flow path and the third inlet are arranged outside the tube layer. On the other hand, as described above, not only a device incorporating a heat exchanger but also a reduction in size and weight is a common problem in various devices. Therefore, it is desirable to make the volume occupied by the third flow path and the third inlet as small as possible.

<Constitution>
Therefore, the ninth heat exchanger is the above-described eighth heat exchanger, and the third flow path is inclined with respect to the second axial direction and communicated from the third inlet to the communication portion. It is a multilayer heat exchanger. As described above, the third inflow port is disposed outside the tube layer in a projection view onto a plane orthogonal to the second axial direction. On the other hand, the communication portion is an opening formed in the second member that is a member that defines the second flow path, and typically corresponds to an interlayer region of the cylindrical second member that defines the second flow path. An opening as a communication portion is formed on the side surface of the region.

  In the ninth heat exchanger, as described above, the third flow path is configured so as to be inclined with respect to the second axial direction and communicated from the third inlet to the communicating portion. Typically, the third flow path is configured to communicate the third inlet and the communication portion with the shortest distance. Thereby, the volume which the 3rd flow path and 3rd inflow port which are arrange | positioned on the outer side of a tube layer in the projection view to the plane orthogonal to the 2nd axial direction occupy can be made small.

  For example, FIG. 19 is a schematic cross-sectional view showing one example of the configuration of the ninth heat exchanger. As shown in FIG. 19, in the ninth heat exchanger 109 shown in this example, the outer side of the tube layer included in the second flow path (the upper side and the lower side of the two alternate long and short dash lines shown in the figure) The third flow path 23 that guides the second fluid from the third inflow port 24 formed to the communication portion 20a is inclined with respect to the second axial direction. As a result, as indicated by the hatched portion, the volume occupied by the third flow path 23 and the third inflow port 24 can be further reduced.

<effect>
As described above, according to the ninth heat exchanger, the volume occupied by the third flow path and the third inlet formed outside the tube layer included in the second flow path can be further reduced. As a result, it is possible to contribute to reducing the size and weight of a device in which the ninth heat exchanger is incorporated (for example, a fuel cell cogeneration system and a gas heat pump).

<< 10th Embodiment >>
Hereinafter, a multilayer heat exchanger according to a tenth embodiment of the present invention (hereinafter may be referred to as a “tenth heat exchanger”) will be described with reference to the drawings. As described above, in the eighth heat exchanger, the third flow path and the third inflow port are disposed outside the tube layer in the projection view onto the plane orthogonal to the second axial direction. In the ninth heat exchanger, the third flow path for guiding the second fluid from the third inflow port formed outside the tube layer included in the second flow path to the communication portion is provided in the second axial direction. By making it incline with respect to it, the volume which a 3rd flow path and a 3rd inflow port occupy is reduced.

  However, from the viewpoint of reduction in size and weight, it is more desirable that the third flow path and the third inflow port do not protrude outside the tube layer in the projection view onto the plane orthogonal to the second axial direction. In other words, it is more desirable to completely prevent the heat exchanger of the present invention from becoming large due to the third flow path and the third inlet.

<Constitution>
Therefore, the tenth heat exchanger is the sixth heat exchanger or the seventh heat exchanger described above, and is configured to satisfy the following requirements in the projection view on the plane orthogonal to the second axial direction. It is a multilayer heat exchanger.

Requirement 1: Upstream tube layer in which a part of the downstream tube layer, which is a tube layer closer to the second outlet, is a tube layer closer to the second inlet, among a pair of tube layers sandwiching the interlayer region The protrusion part which is a part protruded from at least one part of the outer edge of is formed.
Requirement 2: A third flow path and a third inlet that communicate with the interlayer region are included in the protrusion.

  In other words, Requirement 1 is that when observed from the second inlet side (upstream side) along the second axial direction, the downstream tube layer (near the outer edge) of the pair of tube layers sandwiching the interlayer region. A part protrudes outward from at least a part of the outer edge of the upstream tube layer. Therefore, as described in the requirement 2, if the third flow path is provided so as to extend from the second inlet toward the portion (projection), the eighth heat exchanger and the ninth heat exchanger described above are provided. There is no need to add and secure a space for arranging the third flow path and the third inflow port on the outside of the tube layer as in the heat exchanger. That is, the enlargement of the heat exchanger of the present invention due to the third flow path and the third inlet can be prevented.

  For example, FIG. 20 is a schematic cross-sectional view showing one example of the configuration of the tenth heat exchanger. As shown in FIG. 20, the tenth heat exchanger 110 shown in this example includes three tube layers A to C stacked at a predetermined interval in the second axial direction. Between B and between the tube layers B and C, an interlayer region including a through space is provided. Further, in this example, the areas of the three tube layers A to C are smaller toward the upstream side, and when viewed from the upstream side, the outer edge portion of the downstream tube layer is outside the entire circumference of the adjacent outer edge of the upstream tube layer. The protrusion part which protrudes in is formed. In addition, the third flow path 23 is configured so as to guide the second fluid from the third inflow port 24 toward the respective protrusions in a direction parallel to the second axial direction. That is, the tenth heat exchanger 110 is a multilayer heat exchanger that satisfies the requirements 1 and 2 described above.

  As described above, in the tenth heat exchanger 110, a space for disposing the third flow path 23 and the third inlet 24 is a tube like the eighth heat exchanger and the ninth heat exchanger described above. The third flow path 23 and the third inflow port 24 for guiding the second fluid to the respective interlayer regions can be provided without additional securing outside the layers. That is, good heat exchange efficiency can be maintained while preventing an increase in the size of the heat exchanger due to the third flow path and the third inflow port.

  As described above, the tenth heat exchanger 110 illustrated in FIG. 20 protrudes outward from the entire circumference of the outer edge of the adjacent upstream tube layer when the outer edge portion of the downstream tube layer is observed from the upstream side. The projecting portion is formed. However, as long as a sufficient amount of the second fluid can be guided to the respective interlayer regions, the outer edge of the downstream tube layer does not necessarily have to protrude outward from the entire circumference of the outer edge of the adjacent upstream tube layer. The outer edge portion of the downstream tube layer may protrude outward only at a part of the outer edge of the adjacent upstream tube layer. Specifically, for example, the outer edge portion of the downstream tube layer may protrude outward only in the vertical direction of the outer edge of the adjacent upstream tube layer, or in the horizontal direction of the outer edge of the adjacent upstream tube layer. May protrude only outward.

<effect>
As described above, according to the tenth heat exchanger, the second fluid is guided to the respective interlayer regions without additional space for arranging the third flow path and the third inflow port. The third flow path and the third inflow port can be provided. As a result, it is possible to effectively contribute to reducing the size and weight of a device in which the tenth heat exchanger is incorporated (for example, a fuel cell cogeneration system and a gas heat pump).

<< 11th Embodiment >>
Hereinafter, a multilayer heat exchange unit (hereinafter, may be referred to as “first heat exchange unit”) according to an eleventh embodiment of the present invention will be described with reference to the drawings. As described at the beginning of the present specification, the present invention includes not only the heat exchanger of the present invention according to various embodiments including the first to tenth heat exchangers described above, but also the heat of the present invention. It also relates to a heat exchange unit with an exchanger.

<Constitution>
Therefore, the first heat exchange unit includes the multilayer heat exchanger of any one of the first heat exchanger to the tenth heat exchanger described above, and the second inlet in the second flow path included in the multilayer heat exchanger. And a power device configured to flow the second fluid from the second outlet to the second outlet.

  The configuration of the power device is not particularly limited as long as the second fluid can flow from the second inlet to the second outlet in the second flow path. Specific examples of the power unit include a fan and a blower. Further, the first heat exchange unit may be provided with a separate power device, or a power device provided in a device in which the first heat exchange unit is incorporated (for example, a fuel cell cogeneration system and a gas heat pump) is used (shared). May be.

  Furthermore, the connection form of the multilayer heat exchanger and the power unit in the first heat exchange unit is such that the second fluid flows from the second inlet to the second outlet in the second flow path provided in the multilayer heat exchanger. As long as it is possible, there is no particular limitation. Typically, the multilayer heat exchanger and the power unit are connected in series via a duct having a flow path communicating with a second flow path included in the multilayer heat exchanger. The shape, size and structure of the duct are various conditions such as the viscosity, flow rate, pressure and temperature of the second fluid assumed in the application of the first heat exchange unit, and the configuration of the apparatus in which the first heat exchange unit is incorporated. It can be selected as appropriate according to the conditions.

  The positional relationship between the multilayer heat exchanger and the power unit when the multilayer heat exchanger and the power unit are connected in series via the duct as described above is also the inside of the second flow path included in the multilayer heat exchanger. As long as it is possible to flow the second fluid from the second inlet to the second outlet, there is no particular limitation. For example, the power unit may be disposed upstream of the multilayer heat exchanger (ie, the second inlet side), or the power unit may be disposed downstream of the multilayer heat exchanger (ie, the second outlet side). It may be arranged.

  However, when the power unit is arranged upstream of the multilayer heat exchanger (that is, the second inlet side), the second fluid flows into the multilayer heat exchanger after contacting the power unit. Therefore, the temperature of the second fluid flowing into the multilayer heat exchanger may be affected by the temperature of the power unit. From the viewpoint of reducing such a concern, it is desirable that the power unit is disposed on the downstream side (that is, the second outlet side) of the multilayer heat exchanger.

  Here, the configuration of various heat exchange units including the multilayer heat exchanger and the power unit in the arrangement as described above will be described with reference to the drawings. FIG. 21 is a schematic diagram illustrating an example of a configuration of a heat exchange unit 400 in which a multilayer heat exchanger 100 according to the related art and a fan 300 as a power device are arranged in series by a duct 200. In the heat exchange unit 400, as indicated by the white arrow, the second fluid (for example, air) is sucked from the intake port 410 formed in the back panel 430b, and multilayer heat exchange is performed from the second inflow port 21. Into the vessel 100 and out of the second outlet 22. Then, the second fluid flows out from the exhaust port 420 formed in the front panel 430f via the duct 200. Such a second fluid flow is achieved by the fan 300.

  However, as described above, in the multilayer heat exchanger 100 according to the related art, the air exchanged with the fluid in the tube in the vicinity of the upstream tube layer (upstream layer) is the downstream tube layer (downstream layer). ). Therefore, the temperature difference between the first fluid and the second fluid in the vicinity of the downstream layer is smaller than the temperature difference between the first fluid and the second fluid in the vicinity of the upstream layer, and the heat exchange efficiency in the downstream layer is increased. Lower than the heat exchange efficiency. That is, in the heat exchange unit 400 including the multilayer heat exchanger 100 according to the related art, it may be difficult to achieve an increase in heat exchange efficiency commensurate with an increase in fin area due to the multilayering.

  However, as described above, the heat exchanger according to the present invention includes a communication portion that is at least one opening configured to communicate between the interlayer region and the external space without passing through another tube layer. Therefore, since the temperature difference between the first fluid and the second fluid in the vicinity of the downstream layer is smaller than the temperature difference between the first fluid and the second fluid in the vicinity of the upstream layer, the heat exchange efficiency in the downstream layer is increased. The problem of lower than the heat exchange efficiency in can be reduced.

  Here, it replaces with the multilayer heat exchanger 100 which concerns on a prior art, about the structure of the heat exchange unit provided with the multilayer heat exchanger (this invention heat exchanger) which concerns on some embodiments of this invention, referring drawings. explain.

  FIG. 22 relates to an eleventh embodiment of the present invention that includes the multilayer heat exchanger (eighth heat exchanger 108) according to the eighth embodiment of the present invention described above instead of the multilayer heat exchanger 100 according to the related art. It is typical sectional drawing which shows an example of a structure of a heat exchange unit (1st unit 401). FIG. 23 shows the configuration of the first unit 402 including the multilayer heat exchanger (the ninth heat exchanger 109) according to the ninth embodiment of the present invention described above, instead of the multilayer heat exchanger 100 according to the related art. It is typical sectional drawing which shows an example. Furthermore, FIG. 24 shows a configuration of the first unit 403 including the multilayer heat exchanger (tenth heat exchanger 110) according to the tenth embodiment of the present invention described above instead of the multilayer heat exchanger 100 according to the prior art. It is typical sectional drawing which shows an example.

  In any of the first units, since the multilayer heat exchanger includes the communication portion (and the third flow path 23 and the third inlet 24), it is possible to introduce a new second fluid from the external space to the interlayer region. Yes (see solid arrows in each figure). Therefore, the problem that the temperature difference between the first fluid and the second fluid in the vicinity of the downstream layer is smaller than the temperature difference between the first fluid and the second fluid in the vicinity of the upstream layer can be reduced. As a result, the problem that the heat exchange efficiency in the downstream layer is lower than the heat exchange efficiency in the upstream layer can be reduced.

  The configurations and effects of various heat exchangers of the present invention including the eighth heat exchanger 108 to the tenth heat exchanger 110 included in the first units 401 to 403 described above are variously implemented according to the present invention. Since it already mentioned in detail in the description regarding the multilayer heat exchanger which concerns on a form, description here is abbreviate | omitted.

<effect>
As described above, the first unit includes the heat exchanger of the present invention including the communication portion that is at least one opening configured to communicate the interlayer region and the external space without passing through another tube layer. . Therefore, the downstream tube layer of the pair of tube layers sandwiching the interlayer region includes not only the air that has undergone heat exchange in the upstream tube layer but also the outside (without passing through other tube layers). New air entering the space is also supplied. As a result, the temperature of the air in contact with the fin in the tube layer on the downstream side is closer to the temperature of the fluid flowing into the tube from the introduction portion than the temperature of the air in contact with the fin in the vicinity of the tube layer on the upstream side. Can be reduced. That is, according to the first unit, it is possible to provide a multilayer heat exchanger that can sufficiently exhibit the effect of increasing the heat exchange efficiency due to the multilayered heat exchanger.

  For the purpose of describing the present invention, several embodiments having specific configurations have been described with reference to the accompanying drawings. However, the scope of the present invention is limited to these exemplary embodiments. Needless to say, modifications should be made as appropriate within the scope of the claims and the description.

  DESCRIPTION OF SYMBOLS 10 ... 1st flow path, 10c ... Bending part, 10t ... Tube, 11 ... 1st inflow port, 12 ... 1st outflow port, 13 ... Splitting member (header, manifold, etc.), 14 ... Confluence member (header, manifold, etc.) ), 15... Connecting member (bent pipe or the like), 20... Second flow path, 20 a .. communication part, 20 a 1... First opening, 20 a 2. 20s ... partition member, 20t ... second member, 21 ... second inlet, 22 ... second outlet, 23 ... third flow path, 24 ... third inlet, 30-34 ... second fluid, 100 ... multilayer Heat exchanger (prior art), 101-110 ... multilayer heat exchanger (present invention), 200 ... duct, 300 ... fan (power device), 400 ... heat exchange unit (prior art), 401-403 ... heat exchange unit (Invention), 410 ... Intake port, 4 0 ... exhaust port, 430b ... back panel, 430f ... front panel, 500 ... device (fuel cell cogeneration system and gas heat pump, etc.), 510 ... intake port, 520 ... new intake port, 530 ... new intake flow path, A to C: tube layer.

Claims (13)

A first flow path, which is a flow path configured such that the first fluid flowing in from the first inlet flows through the inside and flows out from the first outlet, and the second fluid flowing in from the second inlet flows through the inside. A second flow path that is a flow path configured to flow out from the two outlets, and a tube that is a tubular member that defines the first flow path so as to be in heat conductive contact with the second flow path. Including fins that are plate-like members disposed in
The tube includes a plurality of penetration portions that are portions that penetrate the second flow path in a direction intersecting both a second axial direction that is an axial direction of the second flow path and a plane parallel to the main surface of the fin. Have
The plurality of penetrating portions include a plurality of rows of penetrating portions arranged in a direction intersecting the second axis direction in a cross section by a plane intersecting the first axis direction which is an axial direction of the plurality of penetrating portions. A plurality of tube layers, which are layers formed by a plurality of the penetrating portions arranged in the same plane intersecting the second axis direction, are arranged at predetermined intervals in the second axis direction. Configured to
Configured to exchange heat between the first fluid and the second fluid;
A multi-layer heat exchanger,
An interlayer region that is a region between at least one set of adjacent tube layers among the plurality of tube layers and an external space that is a space outside the second flow path without passing through the other tube layers A communication portion that is at least one opening configured to communicate is formed in a second member that is a member that defines the second flow path.
Multi-layer heat exchanger. A multilayer heat exchanger according to claim 1, comprising:
The communication portion includes a first opening that is an opening formed so as to connect either one or both of both ends of the interlayer region in the direction intersecting the first axial direction and the external space.
Multi-layer heat exchanger. A multilayer heat exchanger according to claim 1 or claim 2, wherein
A through hole is formed in the fin to communicate one space adjacent to the other and the other space across the fin.
Multi-layer heat exchanger. A multilayer heat exchanger according to claim 1 or claim 2, wherein
Among the pair of tube layers sandwiching the interlayer region, the fins that make contact with a plurality of the penetration portions that constitute one tube layer and the plurality of penetration portions that make up the other tube layer and heat The fins that are conductively contacted are configured as discrete fins that are discontinuous, and there is a through space in the interlayer region that is a continuous space parallel to the tube layer and without the fins. ,
Multi-layer heat exchanger. A multilayer heat exchanger according to claim 3 or claim 4, wherein
The communication portion includes a second opening that is an opening formed so as to communicate either one or both ends of the interlayer region in a direction parallel to the first axial direction and the external space.
Multi-layer heat exchanger. A multilayer heat exchanger according to any one of claims 1 to 5,
A flow path through which the second fluid flowing in from the external space flows through the third inlet, which is an opening formed as a part of the second inlet, and flows out from the communicating portion to the interlayer region. A third flow path;
Multi-layer heat exchanger. A multilayer heat exchanger according to claim 6,
At least one third flow path is defined for each of the interlayer regions;
Multi-layer heat exchanger. A multilayer heat exchanger according to claim 6 or claim 7,
In the projection onto the plane perpendicular to the second axial direction, the third flow path and the third inlet are disposed outside the tube layer.
Configured as
Multi-layer heat exchanger. A multilayer heat exchanger according to claim 8,
The third flow path is configured to incline with respect to the second axial direction and communicate with the communication portion from the third inlet.
Multi-layer heat exchanger. A multilayer heat exchanger according to claim 6 or claim 7,
In a projection view onto a plane orthogonal to the second axis direction,
Of the pair of tube layers sandwiching the interlayer region, a part of the downstream tube layer that is the tube layer closer to the second outlet is the upstream that is the tube layer closer to the second inlet. Forming a protruding portion that is a portion protruding from at least a part of the outer edge of the side tube layer, and the protruding portion includes the third flow path and the third inflow port communicating with the interlayer region;
Configured as
Multi-layer heat exchanger. A multilayer heat exchanger according to any one of claims 1 to 10,
A power unit configured to cause the second fluid to flow from the second inlet to the second outlet in the second flow path of the multilayer heat exchanger;
Comprising
Heat exchange unit. A heat exchange unit according to claim 11, comprising:
The multilayer heat exchanger and the power unit are connected in series via a duct having a flow path communicating with the second flow path included in the multilayer heat exchanger.
Heat exchange unit. A heat exchange unit according to claim 12, comprising:
The power unit is disposed on the second outlet side of the multilayer heat exchanger;
Heat exchange unit.

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