JP2014029235A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To relax influence of heat stress and to make a heat exchanger compact.SOLUTION: A heat exchanger includes: four heat exchanger cores 20 arranged to form a generally quadrangular cylinder by connecting ends of the heat exchanger cores 20 to one another, and making heat exchange after a high-temperature fluid and a low-temperature fluid flow into the heat exchanger cores 20; a central duct 45 formed inside the cylinder, from which the high-temperature fluid flows into each of the heat exchanger cores 20 through an inner side surface of the heat exchanger core 20; corner ducts 55 formed outside the cylinder, to which the high-temperature fluid flows out of an outer side surface of each of the heat exchanger cores 20; and a frame 30 arranged outside the four heat exchanger cores 20, formed into a rectangular shape, and supporting one of coupling plates 25 and 26 for coupling the four heat exchanger cores 20 on each side of the frame 30.

Description

    The present invention relates to a heat exchanger having a plurality of heat exchanger cores.

    Conventionally, as a heat exchanger for exchanging heat between a high-temperature fluid and a low-temperature fluid, when a necessary heat exchange amount is large, a heat exchanger having a plurality of heat exchanger cores is known. Has been. In the heat exchanger of Patent Document 1, a plurality of heat exchanger cores are arranged in the circumferential direction inside the cylindrical body, and these heat exchanger cores are supported on the inner surface of the cylindrical body. In this heat exchanger, a high-temperature fluid flows inside the cylinder, a low-temperature fluid flows inside the wall of the cylinder, and the high-temperature fluid and the low-temperature fluid exchange heat in each heat exchanger core. It has become.

Japanese Patent Laid-Open No. 2002-90078

    By the way, when the heat exchanger mentioned above is utilized for the regenerator of a gas turbine, etc., since a high temperature fluid becomes a very high temperature zone, a big thermal stress occurs in a heat exchanger core. Therefore, it is important to consider the thermal stress when designing the portion that supports the heat exchanger core.

    However, in the heat exchanger disclosed in Patent Document 1, since the high-temperature fluid is circulated in the vicinity of the portion that supports the heat exchanger core, excessive thermal stress affects the supporting portion. Become. As a result, the supporting portion of the heat exchanger core needs to have a high strength, which makes it difficult to make the heat exchanger compact.

    This invention is made | formed in view of this point, The objective is to reduce the influence of a thermal stress in a heat exchanger which has a some heat exchanger core, and to attain compactization.

    In the first invention, each is formed in a plate shape, and is arranged so that ends thereof are connected to each other to form a substantially polygonal cylindrical body, and the high temperature side fluid and the low temperature side fluid flow in to exchange heat. A plurality of heat exchanger cores formed on the inside of the cylinder, and formed on the outside of the cylinder, and a high temperature side inlet channel through which the high temperature side fluid flows into each heat exchanger core from an inner surface thereof The high temperature side fluid flows out from the outer surface of each of the heat exchanger cores, and is disposed outside the cylinder so as to surround the high temperature side outlet channel, and the plurality of heat exchanges And a frame for supporting the connecting portion of the vessel core.

    In the first aspect of the invention, the high temperature fluid flowing through the high temperature inlet channel flows into each heat exchanger core, while the low temperature fluid flows into each heat exchanger core. In the heat exchanger core, the high-temperature fluid and the low-temperature fluid that have flowed in exchange heat, and the high-temperature fluid is cooled while the low-temperature fluid is heated. The cooled high temperature fluid flows out from the outer surface of each heat exchanger core to the high temperature outlet channel. That is, in the heat exchanger of the present invention, in the space in the frame, high-temperature fluid flows through the inner space of the cylinder formed by the plurality of heat exchanger cores, and the space between the cylinder and the frame (that is, the cylinder) In the space outside the body, the high temperature side fluid is cooled by the heat exchanger core and the low temperature fluid flows. Thereby, since the high-temperature fluid does not flow in the space between the cylinder and the frame where the portion supporting the connecting portion between the heat exchanger cores is located, the influence of thermal stress on the supporting portion is alleviated.

    In the first invention, since the plurality of heat exchanger cores are arranged to form a polygonal cylindrical body, for example, when arranging the plurality of heat exchanger cores in a straight line, Compared to a case where a plurality of heat exchanger cores connected in a straight line are arranged in a plurality of rows, it is possible to reduce the number of places supporting the heat exchanger core. Also by this, the influence of the thermal stress with respect to the part which supports the connection part of heat exchanger cores is relieved.

    According to a second invention, in the first invention, the connection portion of the plurality of heat exchanger cores is configured such that an end portion of the heat exchanger core is movable.

    In the second aspect of the invention, since the end of the heat exchanger core is movable at the connecting portion between the heat exchanger cores, the heat exchanger core expands and contracts due to thermal stress, and heat exchange is accompanied by the expansion and contraction operation. Even when the displacement of the end portion of the heat exchanger core occurs, the displacement of the end portion of the heat exchanger core can be absorbed by the connecting portion. For example, when all heat exchanger cores are similarly expanded or contracted due to thermal stress, that is, even when the polygonal shape remains the same and only the size changes, the displacement of the heat exchanger core end can be absorbed. Is possible. Therefore, it becomes possible to further alleviate the influence of the thermal stress on the support portion of the heat exchanger core, and a more compact heat exchanger can be realized.

    According to a third invention, in the second invention, the connection part of the plurality of heat exchanger cores is configured such that the connection angle thereof is changeable.

    In the third aspect of the invention, since the connection angle of the connecting portion of the heat exchanger core can be changed, only a part of the heat exchanger core expands or contracts due to thermal stress, or each heat generated by the thermal stress. Even when the expansion and contraction amounts of the exchanger cores are different from each other, it is possible to reliably absorb the displacement of the end portion of the heat exchanger core at the connecting portion. That is, it is possible to cope with the current expansion / contraction operation of the heat exchanger core generated by thermal stress. Therefore, the influence of the thermal stress on the support portion of the heat exchanger core can be further alleviated, and a more compact heat exchanger can be realized.

    According to a fourth invention, in any one of the first to third inventions, the connecting portions of the plurality of heat exchanger cores are configured to be separable.

    In the fourth aspect of the invention, since the connecting portions of the plurality of heat exchanger cores are configured to be separable, for example, when it is desired to replace only a deteriorated heat exchanger core among the plurality of heat exchanger cores, the deterioration The heat exchanger core is easily separated from the other heat exchanger cores. In addition, since a plurality of heat exchanger cores are connected so as to form a polygonal cylindrical body, for example, in any frame, compared to a case where a plurality of heat exchanger cores are connected linearly in a frame, In contrast, the work can be easily separated from the outside of the frame. As a result, the heat exchanger core replacement workability (maintenance workability) is improved.

    According to a fifth invention, in any one of the first to fourth inventions, the frame is formed in a rectangular shape when viewed in the axial direction of the cylindrical body. Further, the plurality of heat exchanger cores are arranged so that four heat exchanger cores form a quadrangular cylindrical body having four sides, and the four connection portions to which the heat exchanger cores are connected are the frame. Each one is supported on each side. And the said high temperature side exit flow path is divided by the said heat exchanger core and the said flame | frame, and is formed in the triangle by the axial view of the said cylinder.

    In the fifth invention, as shown in FIG. 4, the four heat exchanger cores are connected to form a rectangular cylinder, and the four connecting portions are supported on each side of the rectangular frame. Furthermore, since the triangular space partitioned by the cylinder and the frame is used as the high temperature side outlet flow path, the space in the frame can be used effectively. Therefore, the heat exchanger can be made compact.

    In the fifth aspect of the invention, even if a plurality of heat exchangers are arranged in the vertical direction according to the required heat exchange capacity, two of the four connecting portions of the heat exchanger core are arranged in front ( It can be positioned left and right as viewed from the front. Therefore, only the heat exchanger core to be replaced among the four heat exchanger cores can be easily pulled out in the horizontal direction. Further, even if a plurality of heat exchangers are arranged side by side in accordance with the required heat exchange capacity, two of the four connection portions of the heat exchanger core are positioned vertically when viewed from the front (front surface). Can be made. Therefore, only the heat exchanger core to be replaced among the four heat exchanger cores can be easily pulled out from above. As a result, the workability of maintenance is improved.

    According to a sixth aspect of the present invention, in the fifth aspect, the heat exchanger module having the four heat exchanger cores and the frame is configured such that an axial direction of the cylindrical body coincides with a horizontal direction and a rectangular shape of the frame is formed. A plurality of opposing sides are aligned in the horizontal direction and the remaining two opposing sides are aligned in the vertical direction.

    In the sixth aspect of the invention, the axial direction of the cylinder coincides with the horizontal direction, the two opposite sides of the frame rectangle coincide with the horizontal direction, and the remaining two opposite sides coincide with the vertical direction. Since the heat exchanger modules are arranged in the vertical direction or side by side, a plurality of heat exchanger modules can be easily arranged in the vertical direction or side by side.

    Further, if a plurality of heat exchanger modules are simply arranged, it may be difficult to take out only the heat exchanger core to be exchanged. In the present invention, a plurality of heat exchanger modules are arranged in the predetermined state. Thus, as described in the fifth aspect of the invention, it is possible to easily pull out only the heat exchanger core to be exchanged. That is, when a plurality of heat exchanger modules are arranged in the up-down direction, two of the four connecting portions of the heat exchanger core are positioned on the left and right as viewed from the front (front surface). Of the four heat exchanger cores, only the heat exchanger core to be exchanged can be easily pulled out in the horizontal direction. In addition, when a plurality of heat exchanger modules are arranged side by side, two of the four connecting portions of the heat exchanger core are positioned vertically when viewed from the front (front). Of the two heat exchanger cores, only the heat exchanger core to be exchanged can be easily pulled out from above. As a result, the workability of maintenance is improved.

    According to a seventh invention, in the fifth invention, the heat exchanger module having the four heat exchanger cores and the frame is configured such that an inflow port of the high temperature side fluid in the high temperature side inlet channel is an axis of the cylindrical body. A plurality of high temperature side fluid outlets in the high temperature side outlet channel are arranged vertically or horizontally in a state of opening toward the other side in the axial direction of the cylindrical body. It is what.

    In the seventh aspect of the invention, when the plurality of heat exchanger modules are arranged in the vertical direction or side by side, along the flow of the high temperature side fluid, the inlet and the high temperature side of the high temperature side inlet channel of each heat exchanger module Since the outlets of the outlet channels open in the same direction, in each heat exchanger module, the high-temperature side fluid can flow into the high-temperature side inlet channel from the same direction, and the high-temperature side fluid flows into the high-temperature side outlet flow. It is possible to flow out from the road in the same direction. This eliminates the need for piping for individually supplying the high-temperature side fluid to each heat exchanger module and piping for individually flowing out the high-temperature side fluid from each heat exchanger module. Therefore, it is possible to further reduce the size.

    According to the present invention, a plurality of heat exchanger cores are connected so as to form a polygonal cylindrical body, and a connecting portion between the heat exchanger cores is supported on a frame disposed outside the cylindrical body, Furthermore, the inner space of the cylinder is used as the high temperature side inlet flow path, and the space between the frame and the cylinder (that is, the outer space of the cylinder) is used as the high temperature side outlet flow path. It is possible to reduce the influence of the thermal stress on the support portion of the heat exchanger, and it is possible to reduce the design conditions for the support portion of the heat exchanger core. As a result, it is possible to make the heat exchanger compact.

FIG. 1 is a front view showing the overall configuration of the regenerator. FIG. 2 is a side view seen from the right side in FIG. FIG. 3 is a plan view seen from above in FIG. FIG. 4 is a front view showing the configuration of the heat exchanger module. FIG. 5 is a plan view showing a schematic configuration of the heat exchanger module. 6A and 6B are diagrams showing the configuration of the inlet duct, where FIG. 6A shows a plan view and FIG. 6B shows a front view. 7A and 7B are diagrams showing the configuration of the outlet duct, where FIG. 7A shows a plan view and FIG. 7B shows a front view.

    Hereinafter, embodiments of the present invention will be described with reference to the drawings. The following embodiments are essentially preferable examples, and are not intended to limit the scope of the present invention, its application, or its use.

    As shown in FIGS. 1-3, the heat exchanger 10 of this embodiment is used for the regenerator 1 of a gas turbine system. The heat exchanger 10 exchanges heat by flowing in exhaust gas combusted by a combustor of a gas turbine system and compressed air compressed by a compressor of the gas turbine system. In the heat exchanger 10, the exhaust gas is a high temperature side fluid, and the compressed air is a low temperature side fluid.

    In the regenerator 1, an inlet side collecting duct 2 is disposed on the front side, an outlet side collecting duct 3 is disposed on the rear side, and a heat exchanger 10 is disposed between both the ducts 2 and 3. The heat exchanger 10 has a plurality (five in this embodiment) of heat exchanger modules 10a to 10e. These heat exchanger modules 10 a to 10 e are installed on the frame 5. In the frame 5, four support columns 5a are connected by a plurality of beams 5b, and installation spaces for the five heat exchanger modules 10a to 10e are formed side by side in the vertical direction. That is, in the heat exchanger 10, five heat exchanger modules 10a to 10e are arranged in the vertical direction. In addition, as shown in FIG. 3, each heat exchanger module 10a-10e is installed on the middle beam 5c connected between the beam 5b and the beam 5b.

    In the regenerator 1, the exhaust gas flows in from the intake port 2 a of the inlet side collecting duct 2 and is divided into the heat exchanger modules 10 a to 10 e arranged in the vertical direction, and the exhaust gas flowing out from the heat exchanger modules 10 a to 10 e flows. It collects at the outlet side collecting duct 3 and flows out from the exhaust port 3a.

    As shown in FIGS. 4 and 5, each of the heat exchanger modules 10 a to 10 e includes a plurality (four in this embodiment) of heat exchanger cores 20, a frame 30, an inlet duct 40 and an outlet duct 50. Have.

    The four heat exchanger cores 20 are each formed in a plate shape, and are arranged so that the ends of the four heat exchanger cores 20 are connected to each other to form a substantially rectangular (rhombus) cylinder, and are compressed with exhaust gas (high-temperature side fluid). Air (low-temperature side fluid) flows in to exchange heat. The heat exchanger cores 20 are connected by connecting plates 25 and 26 (connecting portions). A central duct 45 having a rhombus cross section is formed inside the cylinder formed by the four heat exchanger cores 20. The central duct 45 is a high temperature side inlet channel through which exhaust gas (high temperature side fluid) flows into each heat exchanger core 20 from its inner surface. The central duct 45 and the inner side surface of each heat exchanger core 20 are connected by an inlet side connection duct 46. The inlet side connection duct 46 is a non-metallic bellows pipe.

    A frame 30 is disposed outside the cylinder formed by the four heat exchanger cores 20. Each of the frames 30 has a rectangular parallelepiped frame structure in which a bar-like horizontal member 31, a vertical member 32, and a depth member 33 are connected. The cylinder formed by the four heat exchanger cores 20 is located in the frame 30. The frame 30 is formed in a rectangular shape when viewed in the axial direction of the cylindrical body (as viewed in the direction perpendicular to the paper surface in FIG. 4). The four connecting plates 25 and 26 to which the heat exchanger cores 20 are connected to each other are supported one by one on each rectangular side of the frame. In the frame 30, corner ducts 55 are formed at four corners defined by the cylinders of the four heat exchanger cores 20. That is, the corner duct 55 is formed in a space defined by the cylindrical body and the frame 30 (a space outside the cylindrical body), and is formed in a triangular shape when viewed in the axial direction of the cylindrical body. The corner duct 55 is a high temperature side outlet channel through which exhaust gas (high temperature side fluid) flows out from the outer surface of each heat exchanger core. Each corner duct 55 and the outer surface of each heat exchanger core 20 are connected by an outlet side connection duct 56. The outlet side connection duct 56 is a non-metallic bellows pipe.

    Although not shown in the heat exchanger core 20, an exhaust gas flow path (high temperature flow path) is formed in the plate thickness direction (short side direction in FIG. 4), and the axial direction of the cylinder (paper surface in FIG. 4). The flow path of the compressed air (low-temperature flow path) is formed in a direction orthogonal to the above, and forms a so-called orthogonal flow. Although not shown, the heat exchanger core 20 is provided with an inflow pipe and an outflow pipe for compressed air at the axial end of the cylinder (the end in the direction perpendicular to the paper surface in FIG. 4). Moreover, in each heat exchanger module 10a-10e of this embodiment, in order to earn heat exchange amount, as shown in FIG. 5, the same heat exchanger core 20 is provided behind each of the four heat exchanger cores 20 as shown in FIG. May be connected in series by the connecting member 20a one by one.

    As shown in FIG. 5, an inlet duct 40 is disposed in front of the frame 30, and an outlet duct 50 is disposed behind the frame 30. As shown in FIG. 6, the inlet duct 40 is a non-metallic bellows pipe in which flanges 42 are provided at both ends of the duct body 41. The inlet duct 40 and the frame 30 are connected by fastening their flanges 34 and 42 with bolts. The inlet duct 40 has a diamond-shaped opening 43, and the exhaust gas flowing into the inlet-side assembly duct 2 flows into the central duct 45 through the opening 43. As shown also in FIG. 7, the outlet duct 50 is a non-metallic bellows pipe in which flanges 52 are provided at both ends of the duct body 51. The outlet duct 50 and the frame 30 are connected by bolting the flanges 34 and 52 to each other. The outlet duct 50 has four triangular openings 53 corresponding to the corner ducts 55, and the exhaust gas from each corner duct 55 flows out to the outlet side collecting duct 3 through the openings 53. That is, the front surface of the central duct 45 is shielded and is not in communication with the inside of the inlet-side assembly duct 2. The corner duct 55 is shielded at its rear surface and is in a state of non-communication with the inside of the outlet side collecting duct 3.

    In each of the heat exchanger modules 10a to 10e, the axial direction of the cylinder formed by the four heat exchanger cores 20 matches the horizontal direction, and two opposite sides of the rectangle of the frame 30 match the horizontal direction and The remaining two sides facing each other are arranged in the vertical direction in a state where they coincide with the vertical direction.

    Protruding pieces 21 are provided at both ends of the heat exchanger core 20, and the protruding pieces 21 are connected to connecting plates 25 and 26 (connecting portions) by connecting shafts 22. The connecting plates 25 and 26 have elongated holes 25a and 26a, and the connecting shaft 22 is inserted into the elongated holes 25a and 26a. In the connection plates 25 and 26, the heat exchanger core 20 can be rotated around the connection shaft 22, and the connection shaft 22 can move in the longitudinal direction of the long holes 25a and 26a. In FIG. 4, the connecting plate 25 located on the upper side and the lower side of the rectangle of the frame 30 has a long hole 25 a extending in the vertical direction (vertical direction). In FIG. 4, the connecting plate 26 positioned on the right side and the left side of the rectangle of the frame 30 has a long hole 26 a extending in the left-right direction (horizontal direction). That is, the connection plates 25 and 26 of the present embodiment are configured such that the end (projection piece 21) of the heat exchanger core 20 is movable (displaceable) so that the connection angle θ (see FIG. 4) changes. ing. In other words, in the connection plates 25 and 26, when the heat exchanger core 20 expands and contracts due to thermal stress, the heat exchanger core 20 is so absorbed as to absorb the displacement of the end of the heat exchanger core 20 accompanying the expansion and contraction operation. The end portion (projection piece 21) of this is freely displaceable.

    In each of the connecting plates 25 and 26, the protruding piece 21 of the heat exchanger core 20 is configured to be separable (separable). That is, the heat exchanger core 20 is configured to be detachable from the connecting plates 25 and 26.

-Effect of the embodiment-
According to the present embodiment, the plurality of heat exchanger cores 20 are connected by the connecting plates 25 and 26 so as to form a polygonal cylinder, and the heat exchanger core 20 is attached to the frame 30 disposed outside the cylinder. The connecting plates 25 and 26 (connecting portions) are supported, and the inner space of the cylinder is a central duct 45 that is a high-temperature side inlet channel, and the space between the frame 30 and the cylinder (that is, The outer space of the cylindrical body) is a corner duct 55 which is a high temperature side outlet channel. Thereby, the inlet flow path of the exhaust gas which is a high temperature side fluid can be put together in the space surrounded by the plurality of heat exchanger cores 20, and the connection plates 25 and 26 between the heat exchanger cores 20 and the support plates 25 and 26 are supported. It is possible to prevent the high-temperature fluid from flowing into the space where the portion of the frame 30 to be positioned is located. Therefore, it is possible to reduce the influence of thermal stress on the support portion of the heat exchanger core 20. Therefore, the design conditions for the support portion of the heat exchanger core 20 can be reduced, and as a result, the heat exchanger 10 can be reduced in size or cost.

    In the present embodiment, since the connection plates 25 and 26 of the heat exchanger core 20 are supported by the frame 30, all the connection plates 25 and 26 are placed outside the frame 30 (that is, relatively low temperature outside air). You can get closer. As a result, the connecting plates 25 and 26 are cooled by the outside air, so that the influence of thermal stress on the connecting plates 25 and 26 and the portion of the frame 30 that supports the connecting plates 25 and 26 can be reduced.

    Further, according to the present embodiment, the end portions of the heat exchanger core 20 are movable (displaceable) so that the connection angle θ of the connection plates 25 and 26 of the plurality of heat exchanger cores 20 changes. Since it comprised, even when the heat exchanger core 20 was expanded-contracted with a thermal stress, the displacement of the edge part of the heat exchanger core 20 accompanying the expansion / contraction operation | movement can be absorbed. Thereby, it becomes possible to further relax the influence of the thermal stress on the support portion of the heat exchanger core 20.

    Further, according to the present embodiment, since the heat exchanger core 20 is configured to be separable in the connecting plates 25 and 26, for example, only the deteriorated heat exchanger core among the plurality of heat exchanger cores 20 is used. It is possible to replace the heat exchanger core separately. Further, since the plurality of heat exchanger cores 20 are connected so as to form a polygonal cylindrical body, for example, any of the connection plates is compared with a case where the plurality of heat exchanger cores are connected in a straight line in the frame. The heat exchanger core 20 can be easily detached from the outside of the frame 30 with respect to 25 and 26 as well.

    In particular, according to the present embodiment, the four heat exchanger cores 20 are connected so as to form a rectangular cylinder, and the four connecting plates 25 and 26 to which the heat exchanger cores 20 are connected are formed into a rectangular frame. The triangular space defined by the cylindrical body and the frame 30 is used as a corner duct 55 that is a high-temperature side outlet channel. Thereby, the space in the frame 30 can be used effectively. Therefore, the heat exchanger 10 can be made compact.

    Further, according to the present embodiment, the plurality of heat exchanger modules 10a to 10e having the four heat exchanger cores 20 and the frame 30 are arranged so that the axial direction of the cylindrical body coincides with the horizontal direction and the rectangular shape of the frame is opposed. The two sides are aligned in the up-down direction with the two opposite sides matching the horizontal direction and the remaining two opposite sides matching the vertical direction. Therefore, in each heat exchanger module 10a to 10e, the exhaust gas can be caused to flow in the horizontal direction with respect to the central duct 45, and the exhaust gas can be caused to flow out from the corner duct 55 in the horizontal direction. Therefore, even if a plurality of heat exchanger modules 10a to 10e are provided to increase the amount of heat exchange, the exhaust gas can be easily distributed to and from the heat exchanger modules 10a to 10e. .

    Moreover, by arranging the plurality of heat exchanger modules 10a to 10e in the vertical direction as described above, in each of the heat exchanger modules 10a to 10e, two of the four connecting plates 25 and 26 of the heat exchanger core 20 are arranged. The two connecting plates 26 can be positioned on the left and right when viewed from the front (front). Thereby, it becomes possible to easily pull out only the heat exchanger core to be replaced out of the four heat exchanger cores 20 in the horizontal direction. Therefore, the workability of maintenance is improved.

    In the present embodiment, the inner and outer surfaces of the heat exchanger core 20 and the central duct 45 and the corner duct 55 are connected by the connection ducts 46 and 56 that are bellows pipes. Even if the end of the plate moves (displaces) due to thermal stress, the connection state with the central duct 45 and the corner duct 55 can be satisfactorily maintained.

<< Other Embodiments >>
For example, in the said embodiment, the quantity of the heat exchanger core 20 may be five or more. That is, you may connect the several heat exchanger core 20 so that the polygonal cylinder more than a pentagon may be made. In that case, if it is possible to hold the heat exchanger core 20 in the frame 30, it is not necessary to support all the connection plates of the heat exchanger cores 20 on the frame 30, and only a part of the connection plates is supported on the frame 30. You may make it support.

    Further, the configuration of the connecting plates 25 and 26 is not limited to the above-described configuration, and when the heat exchanger core 20 expands and contracts due to thermal stress, the displacement of the end portion of the heat exchanger core 20 due to the expansion and contraction operation is absorbed. Any configuration may be adopted as long as the configuration is obtained.

    Moreover, in the said embodiment, the flow system of the heat exchanger core 20 may be a counterflow type.

    The present invention is useful for heat exchangers having multiple heat exchanger cores.

DESCRIPTION OF SYMBOLS 10 Heat exchanger 10a-10e Heat exchanger module 20 Heat exchanger core 25,26 Connection board (connection part)
30 Frame 45 Central duct (High temperature side inlet flow path)
55 Corner duct (high temperature side outlet channel)

Claims (7)

A plurality of heat exchangers, each of which is formed in a plate shape and arranged so as to form a substantially polygonal cylindrical body with their ends connected to each other, and the high temperature side fluid and the low temperature side fluid flow in to exchange heat. The core,
A high temperature side inlet channel formed inside the cylindrical body, and the high temperature side fluid flows into the heat exchanger cores from the inner surface thereof;
A high temperature side outlet channel formed on the outside of the cylindrical body, and the high temperature side fluid flows out from an outer surface of each of the heat exchanger cores;
A heat exchanger comprising: a frame that is disposed outside the cylindrical body so as to surround the high temperature side outlet flow path, and that supports a connection portion of the plurality of heat exchanger cores. In claim 1,
The connection part of these heat exchanger cores is comprised so that the edge part of the said heat exchanger core can move, The heat exchanger characterized by the above-mentioned. In claim 2,
The connection part of the said several heat exchanger core is comprised so that the connection angle can change, The heat exchanger characterized by the above-mentioned. In any one of Claims 1 thru | or 3,
The connection part of the said several heat exchanger core is comprised so that separation is possible, The heat exchanger characterized by the above-mentioned. In any one of Claims 1 thru | or 4,
The frame is formed in a rectangular shape when viewed in the axial direction of the cylindrical body,
The plurality of heat exchanger cores are arranged so that four heat exchanger cores form a quadrangular cylinder having four sides, and four connection portions where the heat exchanger cores are connected to each other of the frame. One by one on the side,
The high temperature side outlet channel is defined by the heat exchanger core and the frame, and is formed in a triangular shape when viewed in the axial direction of the cylindrical body. In claim 5,
In the heat exchanger module having the four heat exchanger cores and the frame, the axial direction of the cylindrical body coincides with the horizontal direction, and two opposite sides of the rectangle of the frame coincide with the horizontal direction, and the remaining A heat exchanger characterized in that a plurality of opposite sides are aligned in the vertical direction or side by side with the vertical direction being coincident with the vertical direction. In claim 5,
In the heat exchanger module having the four heat exchanger cores and the frame, an inlet of a high temperature side fluid in the high temperature side inlet channel opens toward one side in an axial direction of the cylindrical body, and the high temperature side A heat exchanger characterized in that a plurality of high-temperature side fluid outlets in the outlet channel are arranged vertically or side by side in a state of opening toward the other side in the axial direction of the cylindrical body.

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