JP2013249971A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchanger capable of suppressing sound generation due to vortex flow of refrigerant.SOLUTION: Interiors of both upper and lower header parts 5, 8 of a heat exchanger used as an evaporator 1 are partitioned into two spaces 5a and 5b, and 8b and 8a in upper and lower directions by partition parts 23, respectively. A plurality of communication holes 53 which cause upper and lower two spaces 5a and 5b, and 8b and 8a to communicate with each other are formed in the partition parts 23 at intervals in a longitudinal direction of the header parts 5, 8. Both upper and lower edge parts of heat exchange tube 14 arranged between both upper and lower header parts 5, 8 are protruded into spaces 5b, 8b of a heat exchange tube 14 side rather than the partition part 23 in both upper and lower header parts 5, 8. The evaporator 1 has the communication holes 53 formed at a position matched with the heat exchange tubes 14. On both side parts in the longitudinal direction of the header parts 5, 8 in the communication holes 53 formed on the position matched with the heat exchange tube 14, a protrusion part 60 protruded to the heat exchange tube 14 side is disposed on the partition part 23. The edge parts of the heat exchange tubes 14 are located within a range in the upper and lower direction of the protrusion part 60.

Description

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

  In this specification and claims, the top and bottom of FIGS.

  As a heat exchanger used for an evaporator of a car air conditioner and satisfying a reduction in size, weight, performance, and easy manufacture, the present applicant has previously described the longitudinal direction, the vertical direction, and the ventilation. With a pair of header tanks arranged at an interval in the vertical direction, and a longitudinal direction between the upper and lower header tanks in the vertical direction and ventilation in the width direction. A plurality of flat heat exchange tubes arranged in a direction, and each header tank has a leeward header portion and an leeward header portion whose longitudinal direction is directed to the longitudinal direction of the header tank. Each header portion is partitioned into two spaces in the vertical direction by the partition portion, and a plurality of communication holes for allowing the partition portion to pass through the two upper and lower spaces are spaced in the longitudinal direction of the header portion. 1 row of tube rows composed of a plurality of heat exchange tubes arranged in the longitudinal direction of the header tank are arranged between the leeward side and the windward side header portions of both header tanks, and both upper and lower end portions of the heat exchange tubes Is connected to the upper and lower header parts in a state of protruding into the space on the heat exchange tube side in the upper and lower header parts, and there is a relatively large gap between both ends of the heat exchange tube and the partition part (See Patent Document 1).

  However, according to the heat exchanger described in Patent Document 1, when the refrigerant flows in the longitudinal direction of the header part in each header part, the refrigerant protrudes into the space on the heat exchange tube side than the partition part in the header part of the heat exchange tube. Due to the influence of the affected part, a vortex flow of the refrigerant is generated in the space, and a noise is generated due to the vibration of the header tank due to the vortex flow of the refrigerant, and this noise may reduce the quietness of the passenger compartment. There is.

JP 2008-232456 A

  An object of the present invention is to provide a heat exchanger that can solve the above-described problems and suppress the generation of sound due to the vortex flow of the refrigerant.

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

1) With the longitudinal direction oriented in a direction perpendicular to the vertical direction and the ventilation direction, the longitudinal direction is located between the vertical headers and the vertical headers spaced apart from each other. And a plurality of heat exchange tubes connected to the upper and lower header portions with both upper and lower end portions protruding into the upper and lower header portions. A plurality of communication holes that are partitioned into two spaces in the vertical direction and that pass through the two spaces in the vertical direction are formed at intervals in the longitudinal direction of the header portion. A heat exchanger protruding into the space on the heat exchange tube side of the partition part in the part,
It has a communication hole formed at a position that matches the heat exchange tube, and protrudes toward the heat exchange tube at the partitioning portion on both sides in the longitudinal direction of the header portion in the communication hole formed at a position that matches the heat exchange tube A heat exchanger in which the protruding portion is provided and the end portion of the heat exchange tube is positioned within the vertical range of the protruding portion.

  2) It has a pair of header tanks arranged at intervals in the vertical direction with the longitudinal direction oriented in the direction perpendicular to the vertical direction and the ventilation direction, and each header tank has a leeward The side header part and the windward header part are provided side by side in the ventilation direction, and are spaced between the leeward side and the windward header part of both header tanks in a direction perpendicular to the two directions of the vertical direction and the ventilation direction, respectively. At least one tube row made of arranged heat exchange tubes is arranged, the heat exchange tubes are flat in the width direction in the ventilation direction, and the communication holes in the partition portion are directed in the longitudinal direction in the ventilation direction The heat exchanger according to 1) above, wherein the heat exchange tube has a full width within a range in the width direction of the communication hole.

  3) The heat exchanger according to 2) above, wherein the protrusion is formed by bending the partition so as to be inclined toward the heat exchange tube.

  4) a header tank having a first member to which a heat exchange tube is connected; a second member joined to the first member and covering the opposite side of the first member from the heat exchange tube; a first member and a second member The heat exchanger according to any one of 1) to 3), further including a third member disposed between the first member and the third member.

  According to the heat exchangers of 1) to 4) above, the longitudinal direction of the header portion has a communication hole formed at a position that matches the heat exchange tube, and the communication hole formed at a position that matches the heat exchange tube. In both side portions, the partition portion is provided with a protrusion portion protruding toward the heat exchange tube, and the end portion of the heat exchange tube is located within the vertical range of the protrusion portion. Thus, the flow of the refrigerant in the space on the heat exchange tube side is suppressed, and the generation of the vortex of the refrigerant in the refrigerant in the space is suppressed. Therefore, the generation of sound due to the vibration of the header tank due to the vortex flow of the refrigerant is suppressed, and as a result, the decrease in quietness in the passenger compartment is also suppressed.

  According to the heat exchangers 2) and 3), the generation of the vortex flow of the refrigerant in the space on the heat exchange tube side of the partition portion in the header portion is effectively suppressed.

  According to the heat exchanger of 3) above, the protrusion can be formed relatively easily.

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 a figure which shows the flow of the refrigerant | coolant in the evaporator of FIG. It is the AA line expanded sectional view of Drawing 1 which omitted some. It is the BB expanded sectional view of FIG. 3 which abbreviate | omitted one part. It is CC sectional view taken on the line of FIG. It is a disassembled perspective view which shows the upper header tank of the evaporator of FIG. FIG. 4 is a partially enlarged view of FIG. 3.

  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 (direction indicated by 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. The left and right of 3 are called left and right.

  FIG. 1 shows an overall configuration of an evaporator to which the heat exchanger of the present invention is applied, and FIG. 2 shows a refrigerant flow in the evaporator of FIG. 3 to 7 show the configuration of the main part of the evaporator shown in FIG.

  1 to 6, the evaporator (1) is spaced in the vertical direction with its longitudinal direction oriented in a direction (left-right direction) perpendicular to two directions of the vertical direction and the ventilation direction (front-rear direction). And an aluminum upper header tank (2) and an aluminum lower header tank (3), and a heat exchange core portion (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 coupling section (11) that couples and integrates the header sections (8) and (9). 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 (12) is provided at the right end of the leeward upper header portion (5), and a refrigerant outlet (13) is provided at the right end of the leeward upper header portion (6).

  The heat exchange core (4) is arranged with a gap in the left-right direction (the direction perpendicular to the up-down direction and the ventilation direction) with the longitudinal direction facing the up-down direction and the width direction facing the ventilation direction. Two rows of tubes (15) and (16) made of a plurality of extruded aluminum flat shaped heat exchange tubes (14) are provided side by side in the front-rear direction, adjacent to each tube row (15) and (16). Aluminum so as to straddle the heat exchange tubes (14) of both the front and rear tube rows (15) (16) on the outside of the ventilation gap between the heat exchange tubes (14) Corrugated fins (17) are placed and brazed to the heat exchange tubes (14), and aluminum side plates (18) are placed outside the corrugated fins (17) at the left and right ends, respectively. It is configured by brazing. The upper and lower ends of the heat exchange tubes (14) of the leeward side tube row (15) are inserted so as to protrude into the leeward side upper and lower headers (5) and (8). 8) are connected in a continuous manner, and the upper and lower ends of the heat exchange tubes (14) in the windward tube row (16) 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.

  In the leeward tube row (15), there are a plurality of heat exchange tubes (14) arranged in series, here three tube groups (15A) (15B) (15C) from the right end to the left end. The leeward tube row (16) is arranged side by side, one less than the number of tube groups (15A) (15B) (15C) in the leeward tube row (15), Two tube groups (16A) and (16B) are provided side by side from the left end toward the right end. Here, the three tube groups (15A), (15B), and (15C) in the leeward side tube row (15) are moved from the refrigerant inlet (12) side end (right end) toward the other end (left end). ~ Third tube group, the two tube groups (16A) and (16B) in the windward tube row (16) are connected to the refrigerant outlet (13) side from the end (left end) opposite to the refrigerant outlet (13). It shall be called the 4th-5th tube group toward an end (right end).

  The upper header tank (2) forms the lower part of the leeward upper header part (5) and the windward upper header part (6), and the heat exchange tubes (14) of both tube rows (15) (16) are connected. The first aluminum member (20), and the leeward upper header brazed to the first member (20) and covering the opposite side (upper side) of the first member (20) from the heat exchange tube (14) The second member 21 made of aluminum that forms the upper portion of the head portion 5 and the windward header portion 6 is disposed between the first member 20 and the second member 21 and leeward. Aluminum having front and rear partition sections (23) and (24) that partition the upper header section (5) and the windward upper header section (6) into upper and lower spaces (5a) (5b) (6a) (6b), respectively A third member (22) made of a material, a refrigerant inlet (12) and a refrigerant outlet (13), and an end member brazed to the right end of the first to third members (20) (21) (22) 25).

  The first member (20) is formed by pressing an aluminum brazing sheet having a brazing filler metal layer on both sides, and has a substantially U-shaped cross section that forms the lower portion of the leeward upper header portion (5). A first header forming portion (26) having a letter shape, a second header forming portion (27) having a substantially U-shaped cross section that forms the lower portion of the windward upper header portion (6), and both header forming portions ( 26) (27) It is composed of a connecting wall (28) for connecting the two and constituting the lower part of the connecting portion (7). In both header forming portions (26) and (27) of the first member (20), tube insertion holes (29) that are long in the front-rear direction are formed so as to be spaced apart in the left-right direction and located in the same part in the left-right direction The heat exchange tube (14) is inserted into the tube insertion hole (29) so that the upper end of the heat exchange tube (14) protrudes into the lower space (5b) (6b). The first member (20) is brazed by use.

  The second member (21) is formed by pressing an aluminum brazing sheet having a brazing filler metal layer on both sides, and has a substantially U-shaped cross section that forms the upper portion of the leeward upper header portion (5). -Shaped first header forming portion (31), a second header forming portion (32) having a substantially U-shaped cross section that forms the upper portion of the windward upper header portion (6), and both header forming portions (31) (32) The connecting wall (33) that connects the two and constitutes the upper portion of the connecting portion (7). At the position where the third tube group (15C) is provided in the second member (21), a recessed portion (34) opened to the heat exchange tube (14) side and recessed upward is provided as a first header forming portion ( 31), the second header forming portion (32) and the connecting wall (33) are deformed to form a space in the left-right direction. A plurality of reinforcing ribs (35) extending in the front-rear direction and recessed inward are respectively provided in the first and second header forming portions (31), (32) of the second member (21). ) Are formed at intervals in the left-right direction over substantially the entire length. In the first and second header forming portions (31) and (32), the spacing in the left-right direction of the reinforcing rib (35) at the position where the third tube group (15C) is provided is the first and second tube groups (15A). ) (15B) is narrower than the spacing in the left-right direction of the reinforcing rib (35) at the position where it is provided.

  The third member (22) is formed by pressing an aluminum brazing sheet having a brazing filler metal layer on both sides, and the front and rear partitions (23) and (24) are connected to each other by the first member (20). It is interposed between the connecting wall (28) and the connecting wall (33) of the second member (21), brazed to both connecting walls (28), (33), and the connecting portion (7) in the vertical direction. They are connected and integrated by a connecting wall (36) that forms the central portion. And the lower end opening of the recessed part (34) of the second member (21) is closed by the connecting wall (36) of the third member (22), so that the upper part of the leeward side upper header part (5) is covered. A communication path (37) is provided for passing through the space (5a) and the upper space (6a) of the upwind header section (6). Note that a plurality of drain holes (38) are formed in an appropriate portion of the connecting portion (7) except for the portion provided with the communication path (37).

  The portion between the first tube group (15A) and the second tube group (15B) in the front partition (23) of the third member (22), and the second tube group (15B) and the third tube group (15C ) And the portion between the fourth tube group (16A) and the fifth tube group (16B) in the rear partitioning portion (24) of the third member (22), respectively, are long in the front-rear direction. A slit (41) is formed. In the slit (41) of the front partition (23), the tube group (15A) of the leeward tube row (15) in the left and right space in the upper and lower spaces (5a) (5b) of the leeward upper header (5) ( 15B) (15C) and the same number of partitions (42A) (42B) (42C) and (43A) (43B) (43C) dividing plates (44) (45) are inserted into the first to third members ( 20) Brazed to (21) and (22). In the slit (41) of the rear partition (24), the upper and lower spaces (6a) and (6b) of the upwind header section (6) are connected to the tube group (16A) ) (16B) The same number of compartments (46A) (46B) and (47A) (47B) are inserted into the dividing plate (44), and the first to third members (20), (21) and (22) will be inserted. It is attached. The dividing plates (44) and (45) are formed of an aluminum brazing sheet having brazing material layers on both sides.

  Here, the three sections (42A) (42B) (42C) and (43A) (43B) (43C) of the upper and lower spaces (5a) (5b) of the leeward upper header section (5) are connected to the refrigerant inlet (12 ) First to third sections from the side end (right end) toward the other end (left end). The heat exchange tubes (14) of the first to third tube groups (15A), (15B), and (15C) communicate with the first to third sections (43A), (43B), and (43C) of the lower space (5b), respectively. ing. Upper space in the dividing plate (45) between the second section (42B) (43B) and the third section (42C) (43C) of the upper and lower spaces (5a) (5b) of the leeward side upper header section (5) A through hole (48) is formed in the upper part located in (5a) to allow both compartments (42B) (42C) of the upper space (5a) to pass through. Also, the two sections (46A) (46B) and (47A) (47B) of the upper and lower spaces (6a) (6b) of the windward upper header section (6) are connected to the end opposite to the refrigerant outlet (13). It is assumed that the fourth to fifth sections are directed from the portion (left end portion) toward the refrigerant outlet (13) side end portion (right end portion). The heat exchange tubes (14) of the fourth to fifth tube groups (16A) and (16B) communicate with the fourth to fifth sections (47A) and (47B) of the lower space (6b), respectively.

  In the portion on the left side of the third tube group (15C) in the front partition (23) of the third member (22) and the portion on the left side of the fourth tube group (16A) in the rear partition (24), Long slits (51) are formed in the front-rear direction. A closing plate (52) for closing the left ends of the upper and lower spaces (5a) and (5b) of the leeward side upper header portion (5) is inserted into the slit (51) of the front partition portion (23), and the first to first The three members (20), (21) and (22) are brazed, and the first and second spaces (6a) (6b) of the upwind header section (6) are inserted into the slit (51) of the rear partition section (24). ) Is inserted and brazed to the first to third members (20), (21) and (22). The closing plate (52) is formed of an aluminum brazing sheet having brazing material layers on both sides.

  The upper and lower spaces (5a) and (5b) of the leeward upper header portion (5) and the upper and lower spaces (6a) and (6b) of the leeward upper header portion (6) are on the front side of the third member (22). Formed at a position directly above the plurality of heat exchange tubes (14) in the partition (23) and the rear partition (24) and communicated by a communication hole (53) consisting of a long slot in the front-rear direction. Yes. The length in the front-rear direction of the communication hole (53) is shorter than the width in the front-rear direction of the heat exchange tube (14), and the front and rear ends of the heat exchange tube (14) are respectively longer than the front and rear ends of the communication hole (53). Projects outward in the front-rear direction.

  In the portion existing between the first compartments (42A) and (43A) of the front partition (23), the communication hole (53) is a predetermined number located at the right end of the first tube group (15A), in this case 1 It is formed in a portion excluding one heat exchange tube (14) and a predetermined number located in the left end, here, a portion excluding one heat exchange tube (14). Note that a notch (54) is formed from the right end of the front partition (23) between the first sections (42A) and (43A), and both spaces (5a) are formed by the notch (54). ) (5b) are communicated with each other, and the refrigerant inlet (12) is communicated with both spaces (5a) and (5b). Further, in the portion between the second compartments (42B) and (43B) of the front partition (23), the communication hole (53) is a predetermined number located at the right end of the second tube group (15B). Then, it forms in the part except one heat exchange tube (14), and the part except the some heat exchange tube (14) located in the left side. The left side portion of the front partitioning portion (23) between the second sections (42B) and (43B) where the communication hole (53) is not formed is the heat exchange tube (14) of the second tube group (15B). The refrigerant that has flowed into the second compartment (43B) of the lower space (5b) once flows to the right side and then flows into the second compartment (42B) of the upper space (5a) through the communication hole (53). It is a baffle part (55) for. A communication hole (53) is not formed in the portion between the third sections (42C) and (43C) of the front partition (23), and the plurality of circular refrigerant passage holes (56) are spaced apart in the left-right direction. Formed.

  Further, the communication hole (53) of the rear partition (24) of the third member (22) has a predetermined number, in this case one heat exchange tube (14), located at the right end of the fifth tube group (16B). A predetermined number located on the left and right sides of the dividing plate (44), here a portion excluding one heat exchange tube (14), and a predetermined number located at the left end of the fourth tube group (16A) Here, it is formed in a portion excluding one heat exchange tube (14). The rear partition (24) has a notch (57) formed from the right end thereof, and the notch (57) allows the upper and lower spaces (6a) and (6b) to communicate with each other. An outlet (13) is connected to both spaces (6a) and (6b).

  The part where the communication holes (53) on both sides of the divided plates (44) and (45) are not formed in the partition portions (23) and (24) of the third member (22), and the communication on the right side of the closing plate (52) The part where the hole (53) is not formed is the partition (23) (24) when inserting the dividing plate (44) (45) and the closing plate (52) into the slit (41) (51), respectively. Acts as a reinforcing part that suppresses deformation of

  Refrigerant in the third space (42C) located farthest from the refrigerant inlet (12) in the upper space (5a) of the leeward upper header portion (5) and in the upper space (6a) of the leeward upper header portion (6) The fourth section (45A) located farthest from the outlet (13) is communicated with the fourth passage (37).

  Here, the plurality of communication holes (53) formed immediately above the heat exchange tube (14) in the partition portions (23) and (24) of the third member (22) are directed in the longitudinal direction in the ventilation direction. It is a rectangular long hole, and the left and right sides of the communication hole (53) (both sides in the longitudinal direction of the headers (5) and (6)) are the heat exchange tubes (14) on both partitions (23) and (24). A protruding portion (60) protruding to the side (lower side) is provided. As shown in FIG. 7, the projecting part (60) bends both partition parts (23) and (24) of the third member (22) so as to incline toward the heat exchange tube (14), that is, communicates. The left side of the hole (53) is bent so as to incline to the right, and the right side of the communication hole (53) is also bent by inclining to the left toward the bottom. The upper end portion of the heat exchange tube (14) is located within the vertical range of the protrusion (60). Further, the entire width of the heat exchange tube (14) is located within the range of the communication hole (53) in the width direction (left-right direction).

  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 (12) and the refrigerant outlet (13), and therefore does not include the end member (25). And the 1st member (20) forms the upper part of the leeward side lower header part (8) and the windward side lower header part (9), and the 2nd member (21) is the heat exchange tube (1) in the 1st member (20). Cover the opposite side (lower side) of 14) to form the leeward lower header part (8) and the lower part of the leeward lower header part (9). The front partition (23) of the third member (22) partitions the leeward lower header (8) vertically into two spaces (8b) (8a), and the rear partition (24) The upper lower header portion (9) is partitioned into two spaces (9b) and (9a) in the vertical direction. The lower space (8a) (9a) of the leeward lower header part (8) and the leeward lower header part (9) is the upper space (5a) of the leeward upper header part (5) and the windward upper header part (6). Similarly, the upper space (8b) (9b) has the same structure as the lower space (5b) (6b). The first member (20) and the second member (21) of the lower header tank (3) have the same configuration as the first member (20) and the second member (21) of the upper header tank (2).

  A slit (41) that is long in the front-rear direction is formed in a portion between the second tube group (15B) and the third tube group (15C) in the front partition (23) of the third member (22). Number of tube groups (15A), (15B), (15C) in the leeward side tube row (15) in the left-right direction in the space (8a) (8b) of the leeward side lower header section (8) in the slit (41) A dividing plate (44) that divides into one section (58A) (58B) and (59A) (59B) that is one less than that is inserted and brazed to the first to third members (20), (21), and (22). ing.

  Here, the two compartments (59A) (59B) and (58A) (58B) of the upper and lower spaces (8b) (8a) of the leeward lower header section (8) are connected to the refrigerant inlet (12) side end (right end). Part) toward the other end part (left end part). The heat exchange tubes (14) of the first to second tube groups (15A) and (15B) lead to the first section (59A) of the upper space (8b), and the third tube group (15C) to the second section (59B). ) Through the heat exchange tube (14). Further, the upper and lower spaces (9b) (9a) of the windward lower header portion (9) are divided by one (1) less than the entire tube group (16A) (16B) of the windward tube row (16). 62) (61). Here, the section (62) (61) is referred to as a third section. All the heat exchange tubes (14) of the fourth to fifth tube groups (16A) and (16B) communicate with the third section (62) of the upper space (9b).

  The portion on the left side of the third tube group (15C) and the portion on the right side of the first tube group (15A) in the front partitioning portion (23) of the third member (22), and the rear side of the third member (22) Slits (51) that are long in the front-rear direction are formed on the left side of the partition section (24) from the fourth tube group (16A) and the right side of the fifth tube group (16B). A closing plate (52) for closing both left and right ends of the upper and lower spaces (8b) and (8a) of the leeward side lower header portion (8) is inserted into the slit (51) of the front partitioning portion (23), and the first to first Brazed to the third member (20) (21) (22), the slit (51) of the rear partition (24) is inserted into the upper and lower spaces (9b) (9a) of the upwind lower header (9). A closing plate (52) for closing the left and right ends is inserted and brazed to the first to third members (20), (21) and (22). The closing plate (52) is formed of an aluminum brazing sheet having brazing material layers on both sides.

  The upper and lower spaces (8b) (8a) of the leeward lower header portion (8) of the third member (22) and the upper and lower spaces (9b) (9a) of the windward lower header portion (9) are Formed immediately below the plurality of heat exchange tubes (14) in the partition (23) and the rear partition (24), and communicated by a communication hole (53) consisting of a long hole in the front-rear direction. .

  In the portion between the first compartments (58A) and (59A) of the front partition (23), the communication holes (53) are positioned at the left and right ends of the first and second tube groups (15A) and (15B). It is formed in a portion excluding a predetermined number, here, one heat exchange tube (14). Moreover, in the part which exists between 2nd division (58B) (59B) of a front side partition part (23), the communication hole (53) is the predetermined number located in the right-and-left both ends of a 2nd tube group (15B), Here, it forms in the part except one heat exchange tube (14).

  The second section (58B) of the lower space (8a) of the leeward lower header section (8) and the third section (61) of the lower space (9a) of the leeward lower header section (9) 37).

  Here, in both the left and right side portions of the communication hole (53) located immediately below the heat exchange tube (14) in the both partition portions (23), (24) of the third member (22), the both partition portions (23), (24) ) Is provided with a protruding portion (60) protruding toward the heat exchange tube (14) (upper side). The configuration of the communication hole (53) and the protrusion (60) and the relationship between the communication hole (53) and the protrusion (60) and the heat exchange tube (14) are the same as those of the upper header tank (2). The projecting portion (60) is inclined rightward toward the upper side on the left side of the communication hole (53), and is also inclined leftward toward the upper side on the right side of the communication hole (53).

  Refrigerant inlet (12), refrigerant outlet (13), communication path (37), compartment (42A) (42B) (42C) (43A) (43B) (43C) (46A) (46B) (47A) (47B), Split plate (44) (45), through hole (48), communication hole (53), notch (54) (57), circular refrigerant passage hole (56), compartment (58A) (58B) (59A) (59B) ) (61) (62) are provided as described above, so that the refrigerant is the first tube group (15A), the third tube group (15C) farthest from the refrigerant inlet (12), and the refrigerant outlet. It will flow from top to bottom in the heat exchange tube (14) of the fourth tube group (16A) located farthest from (13), and these tube groups (15A) (15C) (16A) will flow downward. It is a tube group. In addition, the refrigerant flows from the bottom to the top in the heat exchange tubes (14) of the second tube group (15B) and the fifth tube group (16B), and these tube groups (15B, 16B) rise. It is a flow tube group. The third tube group (15C) located farthest from the refrigerant inlet (12) in the leeward tube row (15) and the fourth tube located farthest from the refrigerant outlet (13) in the windward tube row (16) The flow direction of the refrigerant in the heat exchange tubes (14) of the group (16A) is the same direction.

  The evaporator (1) described above constitutes a refrigeration cycle together with a compressor, a condenser as a refrigerant cooler, and an expansion valve as a decompressor, and is mounted on a vehicle, for example, an automobile, as a car air conditioner. When the car air conditioner is in operation, the refrigerant that has passed through the compressor, condenser, and expansion valve flows into the leeward upper header section (5) from the refrigerant inlet (12) as shown in FIG. Through the refrigerant outlet (13). The first path consists of the first section (42A) (43A), the first tube group (15A), the first section (58A) (59A), the second tube group (15B), and the second section (42B) (43B). ), Third section (42C) (43C), fourth section (46A) (47A), fourth tube group (16A), third section (61) (62), fifth tube group (16B) and fifth The second path is the first section (42A) (43A), the first tube group (15A), the first section (58A) (59A), and the second tube group (15B). ), Second section (42B) (43B), third section (42C) (43C), third tube group (15C), second section (58B) (59B), third section (61) (62), The fifth tube group (16B) and the fifth section (46B) (47B). While the refrigerant flows in the heat exchange tube (14) of the leeward tube row (15) and in the heat exchange tube (14) of the windward tube row (16), the ventilation of the heat exchange core section (4) It exchanges heat with the air passing through the gap, the air is cooled, and the refrigerant flows out as a gas phase.

  When the refrigerant flows from the refrigerant inlet (12) to the refrigerant outlet (13), the first and second sections (43A) and (43B) of the lower space (5b) of the leeward upper header portion (5), the upper windward header 5th section (47B) of lower space (6b) of section (6), 1st to 2nd sections (59A) (59B) of upper space (8b) of leeward lower header section (8), lower windward header It flows in the longitudinal direction of the third section (62) of the upper space (9b) of the section (9), but the end of the heat exchange tube (14) is the vertical range of the protrusion (60). Therefore, the flow of refrigerant in each compartment (43A) (43B) (47B) (59A) (59B) (62) will be suppressed, each compartment (43A) (43B) (47B) (59A) (59B) (62) suppresses the generation of vortex flow of the refrigerant in the refrigerant. Therefore, the generation of sound due to the vibration of the header tanks (2) and (3) due to the vortex flow of the refrigerant is suppressed, and as a result, the decrease in quietness in the passenger compartment is also suppressed.

  In the embodiment described above, the upper and lower spaces (5a), (5b), (6a), (6b) of the leeward upper header portion (5), the leeward upper header portion (6), and the leeward lower header portion (8) ( 8b) (8a) is a plurality of compartments (42A) (42B) (42C) (43A) (43B) (43C) (46A) (46B) (47A) (47B) (58A) (58B) (59A) ( 59B), but is not limited to this, both upper and lower spaces (5a) of the leeward upper header portion (5), the leeward upper header portion (6) and the leeward lower header portion (8) ) (5b) (6a) (6b) (8b) (8a) may each be a single section. In this case, both the upper and lower spaces (5a) and (5b) of the leeward upper header portion (5) and the upper and lower spaces (6a) and (6b) of the leeward upper header portion (6) are disconnected. The upper and lower spaces (8b) (8a) of the leeward lower header portion (8) and the upper and lower spaces (9b) (9a) of the leeward lower header portion (9) are in communication with each other. The refrigerant flowing into the upper and lower spaces (5a) and (5b) of the leeward upper header section (5) from the refrigerant inlet (12) passes through the heat exchange tubes (14) of the leeward tube row (15). The windward tube array after entering the upper and lower spaces (8b) and (8a) of the leeward lower header portion (8) and then entering the upper and lower spaces (9b) and (9a) of the leeward lower header portion (9) It passes through the heat exchange tube (14) of (16) and enters the upper and lower spaces (6a) and (6b) of the upwind header section (6) and flows out from the refrigerant outlet (13).

  The heat exchanger according to the present invention is suitably used for 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 tank leeward header (leeward upper header)
(5a): Upper space
(5b): Lower space
(6): Upward header section of the upper header tank (upstream upper header section)
(6a): Upper space
(6b): Lower space
(8): The leeward header of the lower header tank (leeward lower header)
(8b): Upper space
(8a): Lower space
(9): Upward header section of the lower header tank (upstream lower header section)
(9b): Upper space
(9a): Lower space
(12): Refrigerant inlet
(13): Refrigerant outlet
(14): Heat exchange tube
(15): Downward tube row
(16): Windward tube row
(20): First member
(21): Second member
(22): Third member
(23): Front partition
(24): Rear partition
(53): Communication hole
(60): Projection

Claims (4)

With the longitudinal direction oriented in the direction perpendicular to the vertical direction and the ventilation direction, the vertical direction is set between the upper and lower header parts arranged at intervals in the vertical direction and the upper and lower header parts. And a plurality of heat exchange tubes connected to the upper and lower header portions with both upper and lower end portions protruding into the upper and lower header portions, and the header portion is vertically A plurality of communication holes that allow the partition portion to pass through the two upper and lower spaces are formed at intervals in the longitudinal direction of the header portion, and the upper and lower end portions of the heat exchange tube are in the upper and lower header portions. A heat exchanger protruding into the space on the heat exchange tube side of the partition,
It has a communication hole formed at a position that matches the heat exchange tube, and protrudes toward the heat exchange tube at the partitioning portion on both sides in the longitudinal direction of the header portion in the communication hole formed at a position that matches the heat exchange tube A heat exchanger in which the protruding portion is provided and the end portion of the heat exchange tube is positioned within the vertical range of the protruding portion. It has a pair of header tanks arranged at intervals in the vertical direction with the longitudinal direction oriented in a direction perpendicular to the two directions of the vertical direction and the ventilation direction, and each header tank has a leeward header And the windward header portion are arranged side by side in the ventilation direction, and are arranged between the leeward side and the windward header portion of both header tanks with an interval in a direction perpendicular to the two directions of the vertical direction and the ventilation direction, respectively. At least one tube row of heat exchange tubes is arranged, the heat exchange tube has a flat shape in which the width direction is directed to the ventilation direction, and the communication hole of the partition portion is a length in which the longitudinal direction is directed to the ventilation direction. The heat exchanger according to claim 1, wherein the heat exchanger tube has a full width within a range in the width direction of the communication hole. The heat exchanger according to claim 2, wherein the protrusion is formed by bending the partition so as to be inclined toward the heat exchange tube. The header tank includes a first member to which the heat exchange tube is connected, a second member joined to the first member and covering the opposite side of the first member from the heat exchange tube, and the first member and the second member. The heat exchanger according to any one of claims 1 to 3, further comprising a third member disposed therebetween, wherein the third member is provided with a partition portion.

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