JP2013104591A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchanger capable of improving heat exchange efficiency between two fluids.SOLUTION: The heat exchanger 1 includes a substrate 2 having a fluid circulation part 3 and an aluminum tube 4 which is wound around the substrate 2 and in which a fluid of a kind different from that of a fluid flowing into the fluid circulation part 3 of the substrate 2 is allowed to flow. The substrate 2 is composed of two aluminum plates 5 mutually bonded like a laminate. The fluid circulation part 3 is formed between the two aluminum plates 5 by projecting either of the two aluminum plates 5 composing the substrate 2 to the outside. The fluid circulation part 3 has a meandering shape composed of a plurality of straight parts 6 arranged parallel and bent parts 7 for connecting between adjacent straight parts 6 through both end parts in a longitudinal direction. The aluminum tube 4 is wound around the substrate 2 so that a part of the aluminum tube 4 is located between the adjacent straight parts 6 in the fluid circulation part 3 of the substrate 2.

Description

  The present invention relates to a heat exchanger used in, for example, a heat pump type hot water supply apparatus.

  In a vehicle with relatively little waste heat, such as a hybrid vehicle or an electric vehicle, a heat source for heating the vehicle interior may be insufficient. Therefore, the power device such as an IGBT of the above-described power conversion device for the vehicle is cooled. It is conceivable that the water used for heating is heated by a heat exchanger using the heat of the refrigerant of the cooling refrigeration cycle that has been compressed by the compressor of the cooling refrigeration cycle to high temperature and pressure. ing.

  As a heat exchanger that heats water with a high-temperature and high-pressure refrigerant, it consists of two flat metal plates arranged in parallel to each other, and wavy fins that are arranged between both metal plates and brazed to both metal plates. And a water circulation member having a water passage provided therein, and a refrigerant circulation pipe having a circular cross section wound around the water circulation member, and a part of the outer peripheral surface of the refrigerant circulation pipe is a water circulation member There is known a heat exchanger brazed in contact with the outer surface of the metal plate (see Patent Document 1).

  However, in the heat exchanger described in Patent Document 1, the contact area between the outer peripheral surface of the refrigerant flow pipe and the outer surface of the metal plate of the water flow member is relatively small, and heat transfer between the refrigerant and water is insufficient. A sufficient heat exchange efficiency cannot be obtained.

JP 2009-121712 A

  The objective of this invention is providing the heat exchanger which can solve the said problem and can improve the heat exchange efficiency between two fluids.

  In order to achieve the above object, the present invention comprises the following aspects.

  1) A substrate having a fluid circulation part and a metal tube that is wound around the substrate and through which a fluid of a type different from the fluid flowing through the fluid circulation part of the substrate flows are provided, and the substrates are joined together in a laminated manner. The fluid circulation part is formed between the two metal plates by bulging outwardly at least one of the two metal plates constituting the substrate, and is composed of two metal plates. The portion is in a meandering shape consisting of a plurality of straight portions arranged in parallel and adjacent bent portions alternately connected at both ends in the longitudinal direction. A heat exchanger in which a metal tube is wound around a substrate so as to be positioned between adjacent straight portions.

  2) The heat exchange as described in 1) above, wherein the fluid circulation part is formed between the two metal plates by expanding only one of the two metal plates constituting the substrate outward. vessel.

  3) It is provided with a substrate comprising two metal plates joined to each other in a laminated manner, and two fluid circulation portions through which different types of fluids flow independently between the two metal plates. The portion is formed between the two metal plates by bulging at least one of the two metal plates constituting the substrate outwardly, and a plurality of substrates are connected to one fluid flow of each substrate. A heat exchanger that is arranged so that the parts and the other fluid circulation part communicate with each other.

  4) A plurality of metal round tubes arranged in parallel with a distance between them so that the longitudinal directions are in the same direction, and the width direction is directed to the longitudinal direction of the round tube, and the longitudinal direction of the round tube is spaced A plurality of metal flat tubes arranged in parallel with each other, and a part of the outer peripheral surface of the round tube and a part of the outer peripheral surface of the flat tube are brought into contact with each other. A heat exchanger in which flat tubes communicate with each other.

  5) The heat exchanger according to 4) above, wherein the flat tube is corrugated, and the bent inner portion of the crest or wave bottom is in contact with only one side portion of the outer peripheral surface of the round tube.

  6) The flat tube is corrugated, the bent inner portion of the crest portion contacts one side portion of the outer peripheral surface of the round tube, and the bent inner portion of the wave bottom portion contacts the other one side portion of the outer peripheral surface of the round tube. The heat exchanger as described in 4) above.

  According to the heat exchangers of 1) and 2) above, it comprises a substrate having a fluid circulation part, and a metal tube through which a different type of fluid is wound around the substrate and flows through the fluid circulation part of the substrate. The substrate is composed of two metal plates joined together in a laminated manner, and the fluid circulation part causes at least one of the two metal plates constituting the substrate to bulge outward. Formed between the two metal plates, and the fluid circulation portion has a meandering shape composed of a plurality of straight portions arranged in parallel and a bent portion alternately connecting adjacent straight portions at both ends in the longitudinal direction. Since the metal tube is wound around the substrate so that a part of the metal tube is located between adjacent straight portions in the fluid circulation portion of the substrate, the contact between the outer surface of the fluid circulation portion of the substrate and the outer peripheral surface of the metal tube The area described in Patent Document 1 In the heat exchanger, the contact area between the outer peripheral surface of the refrigerant flow tube and the outer surface of the metal plate of the water flow member is larger, and the heat transfer between the fluid flowing through the fluid flow portion of the substrate and the fluid flowing through the metal tube is improved. As a result, the heat exchange efficiency is improved.

  According to the heat exchanger of the above 3), two fluid circulation portions which are composed of two metal plates joined together in a laminated manner and in which different kinds of fluids flow between the two metal plates are independently provided. A plurality of substrates, wherein the fluid circulation part is formed between the two metal plates by bulging outwardly at least one of the two metal plates constituting the substrate. However, since one fluid circulation part and the other fluid circulation part of each substrate are arranged to communicate with each other, heat transfer between different types of fluids flowing through the two fluid circulation parts of each substrate is improved. The heat exchange efficiency between both fluids is improved. In addition, the circuit can be freely set according to the fluid flowing through the two fluid circulation portions.

  According to the heat exchangers of the above 4) to 6), a plurality of metal round tubes arranged in parallel with an interval between each other so that the longitudinal direction faces the same direction, and the width direction is the longitudinal direction of the round tube And a plurality of metal flat tubes arranged in parallel at intervals in the length direction of the round tube, and a part of the outer peripheral surface of the round tube and a part of the outer peripheral surface of the flat tube Are contacted, and all the round tubes and all the flat tubes communicate with each other. Therefore, the contact area between the outer peripheral surface of the round tube and the outer peripheral surface of the flat tube is the same as in the heat exchanger described in Patent Document 1. Heat exchange by increasing the heat transfer between the fluid flowing through the fluid circulation part of the substrate and the fluid flowing in the metal tube, which is larger than the contact area between the outer peripheral surface of the refrigerant flow tube and the outer surface of the metal plate of the water flow member. Efficiency is improved.

  According to the heat exchangers 5) and 6) described above, the contact area between the outer peripheral surface of the round tube and the outer peripheral surface of the flat tube can be increased relatively easily.

It is a front view which shows the heat exchanger of Embodiment 1 of this invention. It is a perspective view which shows the heat exchanger of FIG. It is a perspective view which shows the board | substrate used for the heat exchanger of FIG. It is an AA line expanded sectional view of FIG. It is a BB line expanded sectional view of Drawing 1. It is a perspective view which shows the heat exchanger of Embodiment 2 of this invention. It is a front view which shows the heat exchanger of FIG. It is a front view which shows the board | substrate which comprises the heat exchanger of FIG. FIG. 8 is an enlarged cross-sectional view taken along line CC in FIG. 7. It is the DD sectional view taken on the line of FIG. It is the EE line expanded sectional view of FIG. It is a perspective view which shows the heat exchanger of Embodiment 3 of this invention. It is a figure which shows the structure of the round tube and flat tube of the heat exchanger of FIG. It is a perspective view which shows the heat exchanger of Embodiment 4 of this invention. It is a perspective view which shows the heat exchanger of Embodiment 5 of this invention. It is a figure which shows the structure of the round tube and flat tube of the heat exchanger of FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

  In the following description, the term “aluminum” includes aluminum alloys in addition to pure aluminum.

  Moreover, the same code | symbol is attached | subjected to the same part and the same thing through all drawings, and the overlapping description is abbreviate | omitted.

Embodiment 1
This embodiment is shown in FIGS.

  1 and 2 show the overall configuration of a heat exchanger according to Embodiment 1 of the present invention, and FIGS. 3 to 5 show the configuration of the main part thereof.

  In the description of the heat exchanger of the first embodiment, the top, bottom, left and right in FIG. 1 are referred to as top and bottom, and left and right, the right side (upper side in FIG. 4) in FIG. 5 is the front, and the opposite side is the back. .

  1 and 2, the heat exchanger (1) includes a substrate (2) having a fluid circulation part (3), and is wound around the substrate (2) and flows through the fluid circulation part (3) of the substrate (2). An aluminum pipe (4) (metal pipe) through which a different type of fluid flows is provided.

  As shown in FIGS. 1 to 3, the substrate (2) is composed of two aluminum plates (5) (metal plates) joined together in a laminated form, and the two aluminum plates constituting the substrate (2). At least one of (5), here, only one aluminum plate (5) is bulged outwardly, thereby forming a fluid circulation part (3) between both aluminum plates (5). The fluid circulation part (3) extends in the vertical direction and alternately connects a plurality of linear parts (6) and adjacent linear parts (6) arranged in parallel with each other at both ends in the longitudinal direction. It has a meandering shape consisting of a bent portion (7). The lower end of the straight part (6) at the right end of the fluid circulation part (3) is bent to the right and opens to the right edge of the substrate (2), where a water inflow port (8) is provided. A lower end portion of the straight line portion (6) at the left end portion is bent to the left to open at the left edge of the substrate (2), and a water outlet (9) is provided here. As shown in FIG. 4, the distance between the left and right side walls of the straight part (6) of the fluid circulation part (3) is gradually widened toward the rear, and the distance between the adjacent straight parts (6) is It is smaller than the outer diameter of the aluminum tube (4). The substrate (2) is printed with an anti-bonding agent in a required pattern on at least one of the mating surfaces of the two aluminum plates (5), and in this state, the two aluminum plates (5) are crimped. Thus, a laminated plate having a non-crimped portion is manufactured, and fluid pressure is introduced into the non-crimped portion of the laminated plate, thereby forming the fluid circulation portion (3) at a stroke. Further, the substrate (2) includes an aluminum plate (5) provided with an outward bulging portion for forming a fluid circulation portion (3) by pressing, and a flat aluminum plate (5). It is manufactured by joining by an appropriate method such as brazing.

  The aluminum tube (4) is wound around the substrate (2) in a substantially spiral shape, and on the front side of the substrate (2), the straight pipe portion (11) extending in the vertical direction is a fluid circulation portion of the substrate (2) ( 3) located between the adjacent straight portions (6), the outer peripheral surface of the aluminum tube (4) is the right and left side walls of the left and right straight portions (6) and the adjacent straight portions of the front surface of the substrate (2). (6) It touches the part between. As shown in FIG. 5, the aluminum pipe (4) is bent slightly forward at the bent portion (7) of the fluid circulation portion (3) of the substrate (2) so as to get over the bent portion (7). Has been made.

  The heat exchanger (1) described above is used to obtain heat for heating the passenger compartment in a vehicle with relatively little waste heat, such as a hybrid vehicle or an electric vehicle. That is, the refrigerant of the cooling refrigeration cycle that has been compressed by the compressor of the cooling refrigeration cycle to high temperature and high pressure is sent from the left end of the aluminum pipe (4) and discharged from the right end, and the above-described vehicle power conversion device The water heated to cool a power device such as an IGBT is fed from the water inlet (8) of the fluid circulation part (3) of the substrate (2) and flows out from the water outlet (9). And while water flows in the fluid circulation part (3) of the substrate (2), it is heated by the heat of the refrigerant.

  Note that the coolant may flow through the fluid circulation part (3) of the substrate (2), and the water may flow through the aluminum tube (4).

Embodiment 2
This embodiment is shown in FIGS.

  6 and 7 show the overall configuration of the heat exchanger according to the second embodiment, and FIGS. 8 to 11 show the configuration of the main part thereof.

  In the description of the heat exchanger according to the second embodiment, the top, bottom, left, and right in FIG. 7 are referred to as top, bottom, left, and right. The lower side of FIG. 9 to FIG. It will be later.

  6 and 7, the heat exchanger (20) includes a plurality of substantially vertically long circular substrates (21) in which two fluid circulation portions (22) and (23) through which different types of fluids flow are independently provided. In addition, the substrates are arranged in the front-rear direction with the width direction facing the left-right direction, and one fluid circulation part (22) (hereinafter referred to as the first fluid circulation part (22)) of each substrate (21) and the other fluid circulation. The parts (23) (hereinafter referred to as the second fluid circulation part (23)) are brazed so as to communicate with each other, and the first fluid circulation part (22 ) And a header member (24) having a first header part (25) communicating with the second fluid circulation part (23) and a second header part (26) communicating with the second fluid circulation part (23).

  As shown in FIGS. 6 to 8, the substrate (21) is composed of two aluminum plates (27) (metal plates) joined together in a laminated manner, and the two aluminum plates constituting the substrate (21). At least one of (27), here, both aluminum plates (27) are bulged outwardly to form both fluid circulation portions (22) and (23) between both aluminum plates (27). ing. The first fluid circulation part (22) of the substrate (21) has a plurality of linear parts (28) extending in the vertical direction and spaced in the horizontal direction, and upper and lower ends of all the linear parts (28). It consists of both upper and lower communicating parts (29). The second fluid circulation part (23) of the substrate (21) is provided with a plurality of linear parts (up and down) provided at intervals between adjacent linear parts (28) of the first fluid circulation part (22). 31). The substrate (21) is printed with an anti-bonding agent on a required pattern on at least one of the mating surfaces of the two aluminum plates (27), and the two aluminum plates (27) are crimped in this state. Is produced by a so-called roll bond method in which both fluid circulation portions (22) and (23) are formed at once by making a laminated plate having a non-crimped portion and introducing fluid pressure into the non-crimped portion of the laminated plate. . Further, the substrate (21) is formed by brazing the aluminum plates (27) provided with outward bulging portions for forming both fluid circulation portions (22) and (23) by pressing. Manufactured by joining in a suitable manner.

  As shown in FIGS. 9 to 11, the two substrates (21) adjacent in the front-rear direction in the heat exchanger (20) are at least one of the upper and lower communication parts (29) of the first fluid circulation part (22). Either one of the communication portions (29) communicates, and is brazed so as to communicate with at least one of the upper and lower end portions of each linear portion (31) of the second fluid circulation portion (23). Two adjacent substrates (21) are formed on the communication portion (29) of one substrate (21) while the outer surfaces of the linear portion (28) of the first fluid circulation portion (22) are brazed to each other. The convex portion (32) provided around the through hole (33) is brazed in a state where it is inserted into the through hole (34) formed in the communication portion (29) of the other substrate (21). 2 The outer surface of the straight part (31) of the fluid circulation part (23) is brazed and provided around the through hole (36) formed in the straight part (31) of one substrate (21). The convex portion (35) is brazed in a state of being inserted into a through hole (37) formed in the straight portion (31) of the other substrate (21).

  In the heat exchanger (20), on the other hand, here, the refrigerant flowing into the first header portion (25) of the front header member (24) flows through the first fluid circulation portions (22) of all the substrates (21). The water flowing out from the first header portion (25) of the rear header member (24) and flowing into the second header portion (26) of the rear header member (24) It flows through the two fluid circulation part (23) and flows out from the second header part (26) of the front header member (24). For example, in the heat exchanger (20), there are a plurality of paths composed of straight portions (28) of the first fluid circulation portions (22) provided on the plurality of adjacent substrates (21) and the refrigerant flows in the same direction. The flow direction of the refrigerant in the adjacent paths is reverse, and the number of substrates (21) having the straight portions (28) constituting each path is sequentially increased from the upstream side to the downstream side in the flow direction. Two adjacent substrates (21) communicate with each other in at least one of the upper and lower communication portions (29) of the first fluid circulation portion (22) so as to decrease. preferable. Further, in the two adjacent substrates (21) of the heat exchanger (20), the two adjacent substrates (21) so that the flow direction of water in the linear portion (31) of the second fluid circulation portion (23) is different. ) Communicates with the straight part (the upper and lower ends of 231 of the second fluid circulation part (23)).

  Both header members (24) are composed of two aluminum plates (38) (metal plates) joined together in a laminated manner, and at least one of the two aluminum plates (38) constituting the header member (24). On the other hand, in this case, both the aluminum plates (31) are bulged outwardly to form both header portions (25), (26) between the two aluminum plates (31). The refrigerant inflow pipe (41) is connected to the first header part (25) of the front header member (24), and the water outflow pipe (42) is connected to the second header part (26), so that the rear header member (24 The refrigerant outflow pipe (43) is connected to the first header section (25) and the water inflow pipe (44) is connected to the second header section (26).

  The heat exchanger (20) described above is used to obtain heat for heating the passenger compartment in a vehicle with relatively little waste heat, such as a hybrid vehicle or an electric vehicle. That is, the refrigerant of the cooling refrigeration cycle that has been compressed by the compressor of the cooling refrigeration cycle to a high temperature and high pressure passes through the refrigerant inflow pipe (41) and enters the first header portion (25) of the front header member (24). Into the first header portion (25) of the rear header member (24) through the first fluid circulation portion (22) of all the substrates (21) and out of the refrigerant outflow pipe (42). To do. On the other hand, the water heated and used for cooling the power device such as the IGBT of the above-described vehicle power conversion device passes through the water inflow pipe (43) to the second header part (24) of the rear header member (24) ( 26) flows in the second fluid circulation part (23) of all the substrates (21), flows into the second header part (26) of the front header member (24), and flows into the water outflow pipe (44). Spill from. And while water flows in the 2nd fluid circulation part (23) of a board | substrate (21), it is heated with the heat | fever which the refrigerant | coolant which flows in the 1st fluid circulation part (22) has.

  Note that water may flow through the first fluid circulation part (22) of the substrate (21), and the refrigerant may flow through the second fluid circulation part (23).

Embodiment 3
This embodiment is shown in FIG. 12 and FIG.

  FIG. 12 shows the overall configuration of the heat exchanger according to the third embodiment, and FIG. 13 shows the configuration of the main part thereof.

  In FIG. 12, a heat exchanger (50) is composed of a plurality of aluminum round tubes (51) (metal round tubes) arranged in parallel and spaced apart from each other so that the longitudinal direction is in the same direction. A plurality of aluminum flat tubes (52) (metal flat tubes) arranged in parallel with intervals in the longitudinal direction of the round tube (51) with the direction of the longitudinal direction of the round tube (51) A part of the outer peripheral surface of the round tube (51) and a part of the outer peripheral surface of the flat tube (52) are brought into contact with each other, and all the round tubes (51) and all the flat tubes (52) are in contact with each other. Each is communicated.

  Both end portions of all the round tubes (51) are connected to aluminum header tanks (53) and (54) arranged with their longitudinal directions oriented in a direction perpendicular to the longitudinal direction of the round tube (51). Both ends of all the flat tubes (52) are connected to aluminum header tanks (55) and (56) arranged with their longitudinal directions oriented in the longitudinal direction of the round tube (51).

  As shown in FIG. 13, the flat tube (52) is corrugated, and one of the wave crest (57) and the wave bottom (58), here the bent inner portion of the wave crest (57) is a round tube. Only the upper part of the outer peripheral surface of (51) is in contact, and in this state, the flat tube (52) is brazed to the round tube (51). Although not shown, the flat tube (52) is provided with a plurality of channels arranged in the width direction.

  A water inlet (59) is provided at one end of one header tank (53) to which the round pipe (51) is connected, and a water outlet (61) is provided at the other end of the other header tank (54). . In addition, a header tank provided with a water outlet (61) of the header tank (55) located on the water inlet (59) side of both header tanks (55) and (56) to which the flat pipe (52) is connected. The refrigerant inlet (62) is provided at the end on the 54) side, and the refrigerant outlet (63) is provided on the header tank (53) side end provided with the water inlet (59) in the other header tank (56). ) Is provided.

  The heat exchanger (50) described above is used to obtain heat for heating the passenger compartment in a vehicle with relatively little waste heat, such as a hybrid vehicle or an electric vehicle. That is, the refrigerant of the cooling refrigeration cycle that has been compressed by the compressor of the cooling refrigeration cycle to high temperature and high pressure flows into the one header tank (55) through the refrigerant inlet (62) and is divided. It flows into the other header tank (56) through all the flat tubes (52), and flows out from the refrigerant outlet (63). On the other hand, the water heated and used for cooling the power device such as IGBT of the vehicle power converter described above flows into the one header tank (53) through the water inlet (59), and is separated. It flows into the other header tank (54) through all the round pipes (51), and flows out from the water outlet (61). Then, while water flows in the round tube (51), it is heated by the heat of the refrigerant flowing in the flat tube (52).

Embodiment 4
This embodiment is shown in FIG.

  FIG. 14 shows the overall configuration of the heat exchanger of the fourth embodiment.

  In the case of the heat exchanger (65) shown in FIG. 14, a water inlet (59) is provided at one end of one header tank (54) to which a round pipe (51) is connected, and the other header tank (53) A water outlet (61) is provided at the same end as the water inlet (59). The header tank (55) located on the opposite side of the water inlet (59) and the water outlet (61) of the two header tanks (55) (56) to which the flat pipe (52) is connected is partitioned. It is divided into two header portions (67) and (68) in the longitudinal direction by a member (66), and at the end on the header tank (53) side where the water outlet (61) is provided in the header tank (55), A refrigerant inlet (62) is provided so as to communicate with one header part (67), and a refrigerant outlet (63) is provided so as to communicate with the other header part (68). Yes.

  The other structure is the same as that of the heat exchanger (60) of Embodiment 3, and the same code | symbol is attached | subjected to the same part.

  The heat exchanger (65) described above is used to obtain heat for heating the vehicle interior in a vehicle with relatively little waste heat, such as a hybrid vehicle or an electric vehicle. That is, the refrigerant of the cooling refrigeration cycle compressed by the compressor of the cooling refrigeration cycle to high temperature and pressure passes through the refrigerant inlet (62) into one header portion (67) of the header tank (55). Inflow and flow through all flat tubes (52) leading to the header section (67) to the other header tank (56) side, and further pass through all flat tubes (52) leading to the other header section (68). Then flows into the other header section (68) of the header tank (55) and flows out from the refrigerant outlet (63). On the other hand, the water heated and used for cooling the power device such as the IGBT of the vehicle power converter described above flows into the one header tank (54) through the water inlet (59), and is separated. It flows into the other header tank (53) through all the round pipes (51), and flows out from the water outlet (61). Then, while water flows in the round tube (51), it is heated by the heat of the refrigerant flowing in the flat tube (52).

Embodiment 5
This embodiment is shown in FIG. 15 and FIG.

  FIG. 15 shows the overall configuration of the heat exchanger of the fifth embodiment, and FIG. 16 shows the configuration of the main part thereof.

  In the case of the heat exchanger (70) shown in FIGS. 15 and 16, the flat tube (71) is corrugated, and the bent inner portion of the crest portion (72) is the upper portion (one of the outer peripheral surfaces of the round tube (51)). The flat tube (71) is a round tube with the bent inner part of the wave bottom (73) in contact with the lower part (the other one side) of the outer peripheral surface of the round tube (51). (51) is brazed.

  The other structure is the same as that of the heat exchanger (70) of Embodiment 3, and the same code | symbol is attached | subjected to the same part.

  The heat exchanger (70) described above is used to obtain heat for heating the passenger compartment in a vehicle with relatively little waste heat, such as a hybrid vehicle or an electric vehicle. That is, the refrigerant of the cooling refrigeration cycle that has been compressed by the compressor of the cooling refrigeration cycle to high temperature and high pressure flows into the one header tank (55) through the refrigerant inlet (62) and is divided. It flows into the other header tank (56) through all the flat tubes (71), and flows out from the refrigerant outlet (63). On the other hand, the water heated and used for cooling the power device such as IGBT of the vehicle power converter described above flows into the one header tank (53) through the water inlet (59), and is separated. It flows into the other header tank (54) through all the round pipes (51), and flows out from the water outlet (61). While the water flows in the round tube (51), the water is heated by the heat of the refrigerant flowing in the flat tube (71).

  In Embodiment 3-5 mentioned above, a refrigerant | coolant may flow through the inside of a round tube (51), and water may flow through the inside of a flat tube (52) (71).

  The heat exchanger according to the present invention exchanges heat between water and a high-temperature and high-pressure refrigerant, and is suitably used for hybrid vehicles and electric vehicles with relatively little waste heat.

(1): Heat exchanger
(2): Board
(3): Fluid distribution section
(4): Aluminum tube (metal plate)
(5): Aluminum plate (metal plate)
(6): Straight section
(7): Bent part
(20): Heat exchanger
(21): Board
(22) (23): Fluid circulation part
(27): Aluminum plate (metal plate)
(50) (65) (70): Heat exchanger
(51): Round tube
(52) (71): Flat tube
(57) (72): Wave peak
(58) (73): Wave bottom

Claims (6)

A substrate having a fluid circulation portion, and a metal tube through which a fluid of a type different from the fluid that is wound around the substrate and flows through the fluid circulation portion of the substrate flows, and the substrates are joined together in a stacked manner The fluid circulation part is formed between the two metal plates by bulging outwardly at least one of the two metal plates constituting the substrate, and the fluid circulation part is formed of the metal plate. A meandering shape consisting of a plurality of linear portions arranged in parallel and adjacent straight portions alternately bent at both ends in the longitudinal direction, and a portion of the metal tube is adjacent to the fluid circulation portion of the substrate A heat exchanger in which a metal tube is wound around a substrate so as to be positioned between straight portions. The heat exchanger according to claim 1, wherein the fluid circulation part is formed between both metal plates by causing only one of the two metal plates constituting the substrate to bulge outward. A substrate comprising two metal plates joined together in a stacked manner and having two fluid circulation portions through which different types of fluids flow independently between the two metal plates is provided. The at least one metal plate of the two metal plates constituting the substrate is formed between both metal plates by bulging outwardly, and a plurality of substrates are arranged between one fluid circulation portion of each substrate. And a heat exchanger arranged so that the other fluid circulation part communicates. A plurality of metal round tubes arranged in parallel so as to have the longitudinal direction facing the same direction, and the width direction of the round tubes are directed to the longitudinal direction of the round tubes, and the lengths of the round tubes are spaced apart from each other. And a plurality of flat metal tubes arranged in parallel, and a part of the outer peripheral surface of the round tube and a part of the outer peripheral surface of the flat tube are brought into contact with each other. A heat exchanger in which the two are in communication with each other. The heat exchanger according to claim 4, wherein the flat tube is corrugated, and the bent inner portion of the wave crest portion or the wave bottom portion is in contact with only one side portion of the outer peripheral surface of the round tube. The flat tube is corrugated, the bent inner portion of the crest portion is in contact with one side portion of the outer peripheral surface of the round tube, and the bent inner portion of the wave bottom portion is in contact with the other one side portion of the outer peripheral surface of the round tube The heat exchanger according to claim 4.

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