JP2018159479A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchanger capable of preventing occurrence of a gap between an inner surface of an outer vertical wall part and a round outer surface of a third tank component.SOLUTION: A head tank 2 includes a layered part 42 comprising an outer vertical wall part 38 of a first tank component 18, an inner vertical wall part 39 of a second tank component 19, and a middle vertical wall part 41 of a third tank component 21. Roundness 43 in which a vertical dimension is identical to a thickness of partition parts 22, 23 exists between a surface facing a heat-exchange tube side of the partition parts 22, 23 of the third tank component 21 and an outer surface of the middle vertical wall part 41. A slit 44 is formed in the partition parts 22, 23, and an inserted plate 25 is inserted into a slit 45. An end in a side of the outer vertical wall part 38 of the slit 44 is extended to an outer surface of the roundness 43. The inserted plate 25 comprises a first part 47 positioned between the first tank component 18 and the partition parts 22, 23, and within the slit 44, and a second part 48 positioned between the second tank component 19 and the partition parts 22, 23.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a heat exchanger used in a car air conditioner that is a refrigeration cycle mounted on an automobile, for example.

  In this specification and claims, up and down, left and right when viewing the upstream side from the downstream side (direction indicated by arrow X in the drawing) of the air flowing through the ventilation gap between adjacent heat exchange tubes, that is, The top and bottom and the left and right in FIG.

  For example, as a heat exchanger used in an evaporator of a car air conditioner, the applicant of the present invention is arranged between a pair of header tanks and a pair of header tanks which are arranged in the width direction in the airflow direction and at intervals. And a plurality of heat exchange tubes whose both ends are connected to both header tanks, and both header tanks have a leeward header portion located on the leeward side and an leeward header portion located on the leeward side. A row of tubes each composed of a plurality of heat exchange tubes is disposed between the leeward side and the leeward header portion of both header tanks, and both ends of the heat exchange tubes are located on the leeward side of both header tanks and A refrigerant inlet is provided at one end of the leeward header portion of one header tank, and is connected to the windward header portion. A refrigerant outlet is provided at one end, and both header tanks are connected to a first tank constituent member to which a heat exchange tube is connected, and a second tank constituent member that covers the opposite side of the first tank constituent member from the heat exchange tube; A third tank constituent member disposed between the first tank constituent member and the second tank constituent member, and each of the third tank constituent members includes a heat exchange tube in the leeward side and in the leeward header portion of the header tank. Two partition portions for partitioning into two spaces in the longitudinal direction of the two tanks are provided, outer vertical wall portions provided on both side edges of the header tanks in the ventilation direction on both side edges, Inner vertical wall portions provided at both side edges of the second tank component member in the ventilation direction, provided at the leeward edge portion of the leeward partition portion of the third tank component member and the windward edge portion of the windward partition portion, And outside vertical wall and inside A laminated portion overlapping with the intermediate vertical wall portion located between the wall portion is provided, and a slit extending in the ventilation direction is formed in the leeward side partition portion and the windward side partition portion of the third tank component member, and is formed at one end portion. The other end portion of the leeward side and the windward side header portion of one header tank having the refrigerant inlet and the refrigerant outlet, and both ends of the leeward side and the windward side header portion of the other header tank are respectively partitioned by the third tank constituent member. The third tank configuration is closed between both longitudinal end portions of at least one header portion of the leeward header portion and the leeward header portion of both header tanks, which is closed by the inserted plate inserted in the slit formed in the portion. There has been proposed a heat exchanger in which a plate to be inserted is inserted into at least one slit formed in a partition portion of the member (see Patent Document 1).

  In the heat exchanger described in Patent Document 1, each of the first to third tank constituent members is formed by pressing one aluminum plate, so that the intermediate vertical wall portion of the third tank constituent member It is inevitable that the outer surface is rounded between the surfaces of the partition portions facing the first tank constituent member. Therefore, a gap may be generated between the inner surface of the outer vertical wall portion of the first tank constituent member and the round outer surface of the third tank constituent member.

JP 2013-155966 A

  An object of the present invention is to provide a heat exchanger that can solve the above problems and prevent a gap from being formed between the inner surface of the outer vertical wall portion and the outer surface of the rounded surface.

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

1) A pair of header tanks that are spaced in the vertical direction with the width direction in the ventilation direction and the longitudinal direction in the left-right direction, and both header tanks in the longitudinal direction in the vertical direction A plurality of heat exchange tubes disposed at both ends and connected to both header tanks, wherein at least one of the header tanks is disposed so as to overlap in the vertical direction, A second tank component and a third tank component disposed between the two tank components; a header portion is formed between the first tank component and the second tank component; and a third tank The component member has a partition portion that divides the inside of the header portion into two upper and lower spaces, and on both sides of the ventilation direction of the header tank having three tank component members, both sides of the ventilation direction of each tank component member The laminated portion is formed by overlapping the vertical wall portions formed in the portion, and the laminated portion is the outermost vertical wall portion located on the outermost side, the innermost vertical wall portion located on the innermost side, and the intermediate vertical wall located on the middle. The outer vertical wall portion is provided in the first tank component member, the inner vertical wall portion is provided in the second tank component member, the intermediate vertical wall portion is provided in the third tank component member, and the header portion A first space is formed between the first tank constituent member and the partition portion, and a second space is formed between the second tank constituent member and the partition portion. A heat exchanger in which a slit extending in the ventilation direction is formed, an inserted plate is inserted into the slit, and the first to third tank constituent members are joined by a brazing material,
A roundness exists between the outer surface of the intermediate vertical wall portion of the third tank component and the surface of the partition portion facing the first space, and the vertical dimension of the roundness is equal to or less than the thickness of the partition portion. The outer vertical wall side end of the slit of the partition portion extends to the rounded outer surface, and the inserted plate is positioned in the first space and in the second space, and in the second space. The heat exchanger which consists of the 2nd part to perform, and the 1st part of the to-be-inserted board has block | closed the clearance gap between the inner surface of an outer side vertical wall part, and the outer surface of a roundness.

  2) In the cross section of the header tank, the outer shape of the first portion of the inserted plate is surrounded by the inner surface of the first tank component and the surface of the partition portion of the third tank component facing the second space. The outer shape of the second part is the shape of the part surrounded by the inner surface of the second tank component and the surface of the partition of the third tank component facing the second space. The heat exchanger as described in 1) above, which matches.

  3) Both header tanks are provided with a leeward header portion located on the leeward side and an upwind header portion located on the leeward side, and both ends of the heat exchange tube are on the leeward side and leeward header of both header tanks. And the third tank component member has two partition portions that divide the leeward side and the windward side header portion of the header tank into two spaces in the vertical direction, and the leeward side edge portion of the leeward header portion and The heat exchanger as described in 1) or 2) above, wherein the laminated portion is provided at the windward edge portion of the windward header portion.

  4) A refrigerant inlet is provided at one end of the leeward header portion of one header tank, a refrigerant outlet is provided at the same end as the refrigerant inlet in the leeward header portion, and a refrigerant inlet and a refrigerant outlet are provided at one end. A slit is formed in the partition portion of the third tank constituent member at the other end portion of the leeward side and the windward header portion of the one header tank, and at both ends of the leeward side and the windward header portion of the other header tank. The inserted plate inserted into the slit closes the other end of the leeward side and the windward header part of the one header tank, and both ends of the leeward side and the windward header part of the other header tank. The heat exchanger according to 3) above.

  5) A third part that divides the header part into two spaces in the longitudinal direction of the heat exchange tube between the longitudinal ends of at least one of the leeward header part and the leeward header part of both header tanks. The heat exchanger according to 3) or 4) above, wherein at least one slit is formed in the partition portion of the tank constituent member, and an inserted plate is inserted into the slit.

  According to the heat exchangers of 1) to 5), there is a roundness between the outer surface of the intermediate vertical wall portion of the third tank component and the surface facing the first space side in the partition portion, The vertical dimension of the roundness is equal to or less than the thickness of the partition, the outer vertical wall side end of the slit of the partition extends to the outer surface of the round, and the inserted plate is in the first space and in the slit. The first portion located in the second space and the second portion located in the second space, and the first portion of the inserted plate blocks the gap between the inner surface of the outer vertical wall portion and the outer surface of the roundness. Therefore, it is possible to prevent a gap from being generated between the inserted plate and the inner surface of the outer vertical wall portion of the first tank constituent member and the round outer surface of the third tank constituent member.

  In the heat exchanger of 4) above, leakage of the refrigerant to the outside is surely prevented.

  In the heat exchanger of 5) above, unexpected refrigerant leakage between the portions on both sides of the inserted plate in the header portion is reliably prevented.

1 is a partially cutaway perspective view showing an overall configuration of an evaporator to which a heat exchanger according to the present invention is applied. It is the AA line expanded sectional view of Drawing 1 which omitted some. FIG. 3 is a cross-sectional view taken along line B-B in FIG. 2. FIG. 3 is an enlarged sectional view taken along the line CC in FIG. 2. It is the elements on larger scale of FIG. It is a disassembled perspective view which expands and shows the principal part of an upper header tank.

  Embodiments of the present invention will be described below with reference to the drawings. In the embodiment described below, the heat exchanger according to the present invention is applied to an evaporator of a refrigeration cycle constituting a car air conditioner.

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

  In the following description, the downstream side (the direction indicated by the arrow X in the drawing) of the air flowing through the ventilation gap between adjacent heat exchange tubes is referred to as the front, and the opposite side is referred to as the rear.

  FIG. 1 shows the overall configuration of an evaporator to which the heat exchanger of the present invention is applied, and FIGS.

  1 to 4, the evaporator (1) is an aluminum upper header tank (2) arranged in the vertical direction with the width direction oriented in the ventilation direction and the longitudinal direction oriented in the left-right direction. And an aluminum lower header tank (3) and a heat exchange core section (4) provided between the header tanks (2) and (3).

  The upper header tank (2) is located on the leeward side (front side) and the leeward header part (5) with the longitudinal direction facing the left and right direction, and located on the windward side (rear side) and the longitudinal direction in the left and right direction The windward header section (6) is directed and a connection section (7) that connects and integrates both header sections (5) and (6). The lower header tank (3) is located on the leeward side (front side) and the leeward side header section (8) with the longitudinal direction facing the left and right direction, and located on the windward side (rear side) and the longitudinal direction in the left and right direction A windward header section (9) directed toward the head, and a connecting section (not shown) for connecting and integrating the header sections (8) and (9) to each other. In the following description, the leeward header portion (5) of the upper header tank (2) is the leeward upper header portion, the leeward header portion (8) of the lower header tank (3) is the leeward lower header portion, and the upper header tank. The windward header section (6) of (2) is referred to as the windward upper header section, and the windward header section (9) of the lower header tank (3) is referred to as the windward lower header section. A refrigerant inlet (11) is provided at the right end of the leeward upper header portion (5), and a refrigerant outlet (12) is provided at the right end of the leeward upper header portion (6).

  The heat exchange core part (4) is a flat heat exchange tube made of a plurality of aluminum extruded sections arranged at intervals in the left-right direction with the longitudinal direction oriented in the vertical direction and the width direction directed in the ventilation direction ( 13) tube rows (14) and (15) are arranged in two rows in the front-rear direction, and the ventilation gap between the adjacent heat exchange tubes (13) of each tube row (14) and (15) and the left and right Aluminum corrugated fins (16) are arranged outside the heat exchange tubes (13) at both ends so as to straddle the heat exchange tubes (13) of both the front and rear tube rows (14) (15), and the heat exchange tubes (13 ) Are joined by brazing material, aluminum side plates (17) are respectively arranged on the outer sides of the corrugated fins (16) at both left and right ends, and are joined to the corrugated fins (16) by brazing material. Hereinafter, joining with a brazing material is referred to as brazing. The upper and lower ends of the heat exchange tubes (13) of the leeward side tube row (14) are inserted so as to protrude into the leeward side upper and lower headers (5) (8). 8) are connected in a continuous manner, and the upper and lower ends of the heat exchange tubes (13) of the windward tube row (15) are inserted so as to protrude into the windward upper and lower headers (6) and (9). In the state, it is connected to both header parts (6) and (9) in a continuous manner. The corrugated fin (16) is shared by the heat exchange tubes (13) before and after the leeward tube row (14) and the windward tube row (15).

  In the evaporator (1) of this embodiment, the refrigerant flowing from the refrigerant inlet (11) flows through all the heat exchange tubes (13) and flows out from the refrigerant outlet (12).

  The upper header tank (2) is arranged between the aluminum first tank constituent member (18), the aluminum second tank constituent member (19), and both tank constituent members (18) and (19), which are arranged in the vertical direction. An aluminum third tank constituent member (21) is provided. In this embodiment, the first tank component (18) forms the lower part of the upper header tank (2), and the second tank component (19) forms the upper part of the upper header tank (2). A leeward upper header portion (5) and an leeward upper header portion (6) are formed between the tank constituent members (18) and (19). That is, the first tank constituent member (18) forms a leeward upper header portion (5) and a lower portion of the windward upper header portion (6), and both tube rows (14 The heat exchange tube (13) of (15) is connected, and the second tank component (19) forms the upper part of the leeward upper header part (5) and the leeward upper header part (6). The third tank component (21) has both front and rear partitions that divide the leeward upper header (5) and the leeward upper header (6) into upper and lower spaces (5a) (5b) (6a) (6b). It has partition parts (22) and (23) and is brazed to the first and second tank components (18) and (19). Therefore, the lower space (5b) (6b) of the leeward upper header portion (5) and the leeward upper header portion (6) is located between the first tank component member (18) and the third tank component member (21). The upper space (5a) (6a) is the second space formed between the second tank component (19) and the third tank component (21). . The upper header tank (2) is provided with a refrigerant inlet (11) and a refrigerant outlet (12) and is brazed to the right end of the first to third tank components (18), (19) and (21). An aluminum end member (24) and first to third tank components (18), (19), (21) are brazed, and the upper header tank (2) leeward upper header portion (5) and windward side And an aluminum closing plate (25) for closing the left end of the upper header portion (6).

  The first tank component (18) is formed by pressing an aluminum brazing sheet having a brazing filler metal layer on both sides, and the lower part of the leeward side upper header part (5) (heat exchange tube (13 ) Side section) forming a first header forming part (26) having a substantially U-shaped cross section upward, and a lower part (heat exchange tube (13) side part) forming a windward upper header part (6) A U-shaped second header forming portion (27) having a substantially upward surface, and a connecting wall (28) for connecting the header forming portions (26) and (27) to each other and constituting the lower portion of the connecting portion (7). I have. In both header forming portions (26) and (27) of the first tank component (18), tube insertion holes (29) that are long in the front-rear direction are spaced apart in the left-right direction and positioned at the same portion in the left-right direction. The aluminum brazing sheet is formed in such a manner that the upper end of the heat exchange tube (13) is inserted into the tube insertion hole (29) to form the first tank component (18) in the first tank component (18). It is brazed using a brazing filler metal layer.

  The second tank component (19) is formed by pressing an aluminum brazing sheet having a brazing filler metal layer on both sides, and the upper part of the leeward side upper header part (5) (heat exchange tube (13) The first header forming part (31) with a substantially U-shaped transverse cross section that forms the upper part of the windward upper header part (6) (the part opposite to the heat exchange tube (13)) A second header forming portion (32) having a substantially U-shaped transverse section and a connecting wall that connects the header forming portions (31) and (32) and constitutes the upper portion of the connecting portion (7) 33). Although not shown in detail, the first header forming portion (31), the second header forming portion (32), and the connecting wall (33) are provided at appropriate positions in the left and right direction of the second tank component (19). By deforming, a communication part (34) is formed through the upper space (5a) of the leeward upper header part (5) and the upper space (6a) of the leeward upper header part (6).

  The third tank component (21) is formed by pressing an aluminum brazing sheet having a brazing filler metal layer on both sides, and the front and rear partition portions (22) and (23) are connected to each other by the first tank component. The connecting wall (28) of (18) and the connecting wall (33) of the second tank component (19) are interposed between the connecting walls (28) (33) and brazed, and the connecting portion ( 7) is connected and integrated by a connecting wall (35) that forms the center in the vertical direction. Here, both partition parts (22) (23) and the connecting wall (35) are located on the same plane. The upper and lower spaces (5a) and (5b) of the leeward upper header part (5) are positioned at appropriate positions on the front partition (22) and rear partition (23) of the third member (21), and the windward side. Communication holes (22a) and (23a) are formed through the upper and lower spaces (6a) and (6b) of the upper header portion (6). The front partition (22) has a notch (36) formed from the right end thereof, and the notch (36) allows the two spaces (5a) and (5b) to communicate with each other, and the refrigerant inlet (11). Is communicated to both spaces (5a) and (5b). The rear partition (23) has a notch (37) formed from the right end thereof, and the notch (37) allows the upper and lower spaces (6a) and (6b) to communicate with each other. An outlet (12) is connected to both spaces (6a) and (6b).

  Front edge of the first header forming part (26) of the first tank component (18) (downstream edge of the ventilation direction) and rear edge of the second header forming part (27) (upstream edge of the ventilation direction) And vertical vertical wall portions (38) projecting upward (vertically outward) from the partition portions (22) and (23) of the third tank component (21), respectively. Yes. Front edge of the first header forming part (31) of the second tank component (19) (downstream edge in the ventilation direction) and rear edge of the second header forming part (32) (upstream edge of the ventilation direction) Vertical vertical wall portions (39) whose lower end surfaces are in contact with both partition portions (22) and (23) of the third tank component (21), respectively, of the first tank component (18). The vertical wall portion (38) is integrally formed so as to be spaced inside the ventilation direction. To the front edge (the downstream edge of the ventilation direction) of the front partition part (22) of the third tank component (21) and the rear edge (the upstream edge of the ventilation direction) of the rear partition part (23) , Each projecting upward and the front end facing upward (on the opposite side to the heat exchange tube (13)), and the vertical wall portion (38) of the first tank component (18) and the second tank component (19) An intermediate vertical wall portion (41) interposed between the vertical wall portion (39) and the vertical wall portion (39) is integrally formed.

  Therefore, the vertical walls formed at the front and rear side edges of the first to third tank components (18), (19) and (21) at the front and rear side edges (both sides of the ventilation direction) of the upper header tank (2) A laminated portion (42) in which the portions (38), (39), and (41) overlap is provided. In the laminated portion (42), the vertical wall portion (38) of the first tank component member (18) is the outer vertical wall portion located on the outermost side, and the vertical wall portion (39) of the second tank component member (19). Is the inner vertical wall portion located on the innermost side, and the vertical wall portion (41) of the third tank component (21) is the intermediate vertical wall portion located in the middle, and these vertical wall portions (38) ( 39) (41) is brazed. In other words, the outer vertical wall portion (38) is provided on the first tank constituent member (18), and the inner vertical wall portion (39) is provided on the second tank constituent member (19). 41) is provided on the third tank component (21).

  As shown in FIGS. 4-6, the outer surface of both intermediate | middle vertical wall parts (41) of a 3rd tank structural member (21), and the leeward side upper header part (5) in front and rear both partition parts (22) (23) A roundness (43) exists between the lower surface (5b) (6b) facing the lower space (5b) (6b) of the windward upper header portion (6). The vertical dimension of roundness (43) is equal to or less than the thickness of both partitions (22) and (23), and the upper end of roundness (43) (the end on the second tank component (19) side) is both partitions. (22) It is located on the plane where the surface facing the second tank component (19) side of (23) is located or on the heat exchange tube (13) side from the plane. Here, the vertical dimension of the roundness (43) is equal to the thickness of both partition portions (22) and (23).

  The left and right heat exchange tubes (13) of the front and rear partition sections (22) and (23) of the third tank component (21) have a refrigerant inlet (11) and a refrigerant outlet (12) at one end. The leeward side of the upper header tank (2) and the other side of the upwind upper header part (5) (6)) extend in the ventilation direction and extend across the entire width of the front and rear partition parts (22) (23) in the front-rear direction. One slit (44) is formed. Further, at least one second portion extending in the ventilation direction between the left and right end portions of the front partition portion (22) of the third tank component (21) and extending over the entire width of the front and rear partition portions (22) and (23) in the front-rear direction. A slit (45) is formed. The ends of the first slit (44) and the second slit (45) on the outer vertical wall (38) side extend to the outer surface of the round (43).

  A closing plate that closes the left end of both the upper and lower spaces (5a) and (5b) of the leeward upper header section (5) in the first slit (44) of the front partition section (22) of the third tank component (21) (25) is inserted and brazed to the first to third tank components (18), (19) and (21), and the upwind header section is inserted into the first slit (44) of the rear partition section (23). A closing plate (25) for closing the left end of both the upper and lower spaces (6a) and (6b) of (6) is inserted and brazed to the first to third tank components (18), (19) and (21). The closing plate (25) is the inserted plate. Also, the upper and lower spaces (5a) and (5b) of the leeward upper header (5) are divided in the left and right direction into the second slit (45) of the front partition (22) of the third tank component (21). In addition, the total heat exchange tubes (13) of the leeward side tube row (14) are continuously arranged in the left-right direction and are divided into a plurality of tube groups consisting of a plurality of heat exchange tubes (13) in which the refrigerant flows in the same direction. The dividing plate (46) is inserted and brazed to the first to third tank constituent members (18), (19), and (21), and the dividing plate (46) is the inserted plate.

  The closing plate (25) is formed of an aluminum brazing sheet having a brazing filler metal layer on both sides, and is provided in the lower spaces (5b) (6b) of the upper header portions (5) (6) and the first slit ( 44) and a second portion (48) located in the upper spaces (5a) and (6a) of the upper header portions (5) and (6). The closing plate (25) is brazed to the first and second tank constituent members (18) and (19) and the partition portions (22) and (23) of the third tank constituent member (21). In the cross section of the upper header tank (2), the outer shape of the first portion (47) of the closing plate (25) is the header forming portion (1) of the first tank component (18) having the outer vertical wall portion (38). 26) The shape of the part surrounded by the inner surface of (27) and the upper surface facing the upper space (5a) (6a) side of each partition part (22) (23) of the third tank component (21) Similarly, the outer shape of the second part (48) is identical to the inner surface of each header forming part (31) (32) of the second tank constituent member (19) having the inner vertical wall part (39) and the third tank constitution. It matches the shape of the part surrounded by the upper surface of the partition (22), (23) of the member (21) facing both upper spaces (5a) (6a). The first portion (47) of the closing plate (25) closes the gap formed between the outer surface of the round (43) and the inner surface of the outer vertical wall (38) of the laminated portion (42). This prevents the leeward upper header portion (5) of the upper header tank (2) and the lower space (6b) of the windward upper header portion (6) from communicating with the outside.

  The dividing plate (46) has the same configuration as the closing plate (25) and is not shown, but is located in the lower space (5b) and the second slit (45) in the leeward side upper header portion (5). And a second part located in the upper space (5a) of the leeward side upper header part (5), the first and second tank components (18), (19), and the third tank The front partitioning part (22) of the component member (21) is brazed. The first part of the dividing plate (46) closes the gap formed between the outer surface of the round (43) and the inner surface of the outer vertical wall (38) of the laminated portion (42). The left and right sides of the dividing plate (46) in the lower space (5b) of the leeward upper header part (5) of 2) are prevented from communicating with each other.

  In addition, at least one second slit (extending in the front-rear direction of the rear partition (23) between the left and right ends of the rear partition (23) of the third tank component (21) and extending across the entire width of the rear partition (23). 45) is formed, and the upper and lower spaces (6a) and (6b) of the windward upper header section (6) are divided in the left-right direction in the second slit (45), and all the windward tube rows (15) are separated. An aluminum dividing plate is inserted to divide the heat exchange tubes (13) into a plurality of tube groups composed of a plurality of heat exchange tubes (13) in which the heat exchange tubes (13) are continuously arranged in the left-right direction and the refrigerant flows in the same direction. The tank components (18), (19) and (21) may be brazed. The dividing plate is an inserted plate and has the same configuration as the closing plate (25). Further, at least 1 extending between the left and right end portions of the front and rear partition portions (22) and (23) of the third tank component (21) and extending over the entire width of the partition portions (22) and (23) in the front-rear direction. Two second slits (45) are formed, and the second slit (45) is inserted with a flow dividing plate that equalizes the flow of the refrigerant to the heat exchange tubes (13) of the tube group. The tank components (21), (18), (19), and (21) may be brazed. The flow dividing plate is a plate to be inserted and has the same configuration as the closing plate (25).

  The lower header tank (3) has substantially the same configuration as the upper header tank (2), and is disposed upside down with respect to the upper header tank (2). The same parts as those of the upper header tank (2) in the lower header tank (3) are denoted by the same reference numerals. The lower header tank (3) is not provided with the refrigerant inlet (11) and the refrigerant outlet (12), and therefore does not include the end member (24). The first tank component (18) forms the upper part of the lower header tank (3), and the second tank component (19) forms the lower part of the lower header tank (3). A leeward lower header portion (8) and an leeward lower header portion (9) are formed between the members (18) and (19). That is, the first tank component (18) forms the upper part of the leeward lower header part (8) and the windward lower header part (9), and both tube rows (14 The heat exchange tube (13) of (15) is connected, and the second tank component (19) forms the lower part of the leeward lower header part (8) and the leeward lower header part (9). The front partition (22) of the third tank component (21) partitions the leeward lower header (8) vertically into two spaces (8b) (8a), and the rear partition (23) The upper lower header portion (9) is partitioned into two spaces (not shown) in the vertical direction. Therefore, the upper space (8b) of the leeward lower header portion (8) and the leeward lower header portion (9) is formed between the first tank constituent member (18) and the third tank constituent member (21). Similarly, the lower space (8a) is a second space formed between the second tank constituent member (19) and the third tank constituent member (21). The upper and lower spaces (8b) and (8a) of the leeward lower header section (8) are communicated by through holes (22a) formed in the front partition section (22), and the upper and lower spaces of the leeward lower header section (9). Both spaces are connected by a through hole (23a) formed in the rear partition (23). The right and left ends of the upper and lower spaces (8b) and (8a) of the leeward lower header (8) of the lower header tank (3) and the left and right ends of the upper and lower spaces of the upper winder lower header (9) It is the same structure as the closing plate (25) of the tank (2), and is similarly closed by the closing plate (25) brazed to the first to third tank components (21).

  In addition, it extends in the ventilation direction between the left and right end portions of at least one of the front and rear partition portions (22) and (23) of the third tank component (21) of the lower header tank (3) and At least one second slit (45) is formed across the entire width of the partition portion in the front-rear direction, and the second slit (45) includes an upwind lower header portion (8) and / or an upwind lower header portion (9). Both upper and lower spaces are divided in the left-right direction, and the total heat exchange tubes (13) of the leeward tube row (14) and / or the windward tube row (15) are continuously arranged in the left-right direction and the refrigerant is in the same direction. An aluminum dividing plate divided into a plurality of tube groups composed of a plurality of flowing heat exchange tubes (13) may be inserted and brazed to the first to third tank components (18), (19), and (21). . The dividing plate is an inserted plate and has the same configuration as the closing plate (25). Further, between the left and right end portions of at least one of the front and rear partition portions (22) and (23) of the third tank component (21) of the lower header tank (3), At least one second slit (45) is formed across the entire width of the partition part in the front-rear direction, and the second flow (45) is used to make the flow of refrigerant to the heat exchange tube (13) of the tube group uniform. A plate may be inserted and brazed to the first to third tank components (18), (19) and (21). The flow dividing plate is a plate to be inserted and has the same configuration as the closing plate (25).

  In the evaporator (1) described above, the low-pressure gas-liquid mixed-phase two-phase refrigerant that has been compressed by the compressor and passed through the condenser and the expansion valve passes through the refrigerant inlet (11) and is on the leeward upper header portion of the evaporator (1) (5) Enters inside, passes through the total heat exchange tube (13), and flows out from the refrigerant outlet (12) of the upwind header section (6). Then, while the refrigerant flows in the heat exchange tube (13), it exchanges heat with the air passing through the ventilation gap between the heat exchange tubes (13) adjacent in the left-right direction, and the refrigerant flows out as a gas phase. .

  In the said embodiment, the 1st tank structural member (18) provided with the outer vertical wall part (38) is the heat exchange core part (4) (heat exchange tube (13) of both upper and lower header tanks (2) (3). )) Side and the second tank component (19) provided with the inner vertical wall (39) is the heat exchange core (4) of the upper and lower header tanks (2) (3) (heat exchange tube ( 13)) is formed on the opposite side, but on the contrary, the second tank component (19) provided with the inner vertical wall (39) is provided with both upper and lower header tanks (2) (3) The first tank constituent member (18) that forms the heat exchange core portion (4) (heat exchange tube (13)) side and is provided with the outer vertical wall portion (38) is the upper and lower header tanks (2) (3 ) May be formed on the opposite side of the heat exchange core portion (4) (heat exchange tube (13)). In this case, the upper spaces (5a) and (6a) of the upper header portions (5) and (6) become the first space, and the lower spaces (5b) and (6b) become the second space. (9) The lower space (8a) becomes the first space, and the upper space (5b) becomes the second space.

  The heat exchanger according to the present invention is suitably used as an evaporator of a refrigeration cycle constituting a car air conditioner.

(1): Evaporator (heat exchanger)
(2): Upper header tank
(3): Lower header tank
(5): Upper header on the leeward side
(5a): Upper space (second space)
(5b): Lower space (first space)
(6): Upwind header
(6a): Upper space (second space)
(6b): Lower space (first space)
(8): Lower header on the leeward side
(8a): Upper space (second space)
(8b): Lower space (first space)
(9): Upwind lower header
(13): Heat exchange tube
(18): First tank component
(19): Second tank component
(21): Third tank component
(22) (23): Partition
(25): Closing plate (inserted plate)
(38): Outside vertical wall
(39): Inside vertical wall
(41): Middle vertical wall
(42): Laminated part
(43): Roundness
(44): 1st slit
(45): Second slit
(46): Dividing plate (inserted plate)
(47): 1st part
(48): Second part

Claims (5)

A pair of header tanks arranged in the vertical direction with the width direction in the ventilation direction and the longitudinal direction in the horizontal direction, and between the header tanks in the longitudinal direction in the vertical direction A plurality of heat exchange tubes which are disposed at both ends and connected to both header tanks, and at least one of the header tanks is disposed so as to overlap in the vertical direction; The tank constituent member and the third tank constituent member disposed between the tank constituent members, the header portion is formed between the first tank constituent member and the second tank constituent member, and the third tank constituent member Has a partition portion that divides the inside of the header portion into two upper and lower spaces, and has both side edges in the ventilation direction of each tank component on the side edges in the ventilation direction of the header tank having three tank components. Are provided with a laminated portion where the vertical wall portions overlap each other, and the laminated portion is an outermost vertical wall portion located on the outermost side, an inner vertical wall portion located on the innermost side, and an intermediate vertical wall portion located on the middle. The outer vertical wall portion is provided in the first tank component member, the inner vertical wall portion is provided in the second tank component member, the intermediate vertical wall portion is provided in the third tank component member, and the header portion A first space is formed between the first tank constituent member and the partition portion, and a second space is formed between the second tank constituent member and the partition portion, and ventilation is provided to the partition portion of the third tank constituent member. A heat exchanger in which a slit extending in a direction is formed, an inserted plate is inserted into the slit, and the first to third tank constituent members are joined by a brazing material,
A roundness exists between the outer surface of the intermediate vertical wall portion of the third tank component and the surface of the partition portion facing the first space, and the vertical dimension of the roundness is equal to or less than the thickness of the partition portion. The outer vertical wall side end of the slit of the partition portion extends to the rounded outer surface, and the inserted plate is positioned in the first space and in the second space, and in the second space. The heat exchanger which consists of the 2nd part to perform, and the 1st part of the to-be-inserted board has block | closed the clearance gap between the inner surface of an outer side vertical wall part, and the outer surface of a roundness. In the cross section of the header tank, the outer shape of the first portion of the inserted plate is surrounded by the inner surface of the first tank component and the surface facing the second space in the partition of the third tank component Similarly, the outer shape of the second portion matches the shape of the portion surrounded by the inner surface of the second tank component and the surface of the partition of the third tank component facing the second space. The heat exchanger according to claim 1. Both header tanks are provided with a leeward header portion located on the leeward side and an upwind header portion located on the leeward side, and both ends of the heat exchange tubes are connected to the leeward side and the leeward header portion of both header tanks. The third tank constituent member has two partition portions that partition the leeward side and the windward header portion of the header tank into two spaces in the vertical direction, respectively, and the leeward side edge portion and the windward side of the leeward header portion The heat exchanger according to claim 1 or 2, wherein each of the stacked portions is provided at a windward edge portion of the header portion. The refrigerant inlet is provided at one end of the leeward header portion of one header tank, the refrigerant outlet is provided at the same end as the refrigerant inlet in the upwind header portion, and the refrigerant inlet and the refrigerant outlet are provided at one end. A slit is formed in the partition portion of the third tank constituent member at the other end of the leeward side and the windward header portion of one header tank, and at both ends of the leeward side and the windward header portion of the other header tank, The leeward side of the one header tank and the other end portion of the leeward header portion, and both ends of the leeward side and the leeward header portion of the other header tank are closed by the inserted plate inserted into the slit. Item 4. The heat exchanger according to item 3. A third tank configuration that partitions the header portion into two spaces in the longitudinal direction of the heat exchange tube between the longitudinal ends of at least one of the leeward header portion and the leeward header portion of both header tanks The heat exchanger according to claim 3 or 4, wherein at least one slit is formed in the partition portion of the member, and an insertion plate is inserted into the slit.

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