JP6075956B2 - Evaporator - Google Patents

Description

  The present invention relates to an evaporator suitably used for 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. In addition, the left and right in FIGS.

  As an evaporator used in a car air conditioner, between a pair of header tanks arranged at intervals in the vertical direction, the longitudinal direction is oriented in the vertical direction and at intervals in the length direction of the header tanks, and Two rows of tubes, each consisting of a plurality of heat exchange tubes whose upper and lower ends are connected to both header tanks, are provided at intervals in the ventilation direction, and each header tank is arranged in the ventilation direction. A side header portion and a windward header portion, and one row of tube rows is disposed between the leeward side and the windward header portion of both header tanks, and both ends of the heat exchange tube are located on the leeward side and the windward header portion. The refrigerant inlet is provided at one end of the leeward header portion of the upper header tank and is the same as the refrigerant inlet in the leeward header portion of the upper header tank. A refrigerant outlet is provided at the end, and a downflow tube group including a plurality of heat exchange tubes in the leeward tube row and the windward tube row and in which the refrigerant flows from top to bottom in the heat exchange tube, and a plurality of heat An evaporator having an exchange tube and an upflow tube group in which the refrigerant flows from the bottom to the top alternately, and the refrigerant flowing in from the refrigerant inlet passes through all the tube groups and flows out from the refrigerant outlet. Is known (see Patent Documents 1 and 2).

  According to the evaporators described in Patent Documents 1 and 2, the lengthwise direction of both header sections is formed in the leeward side and the windward side header sections of both header tanks at appropriate positions by partition plates formed separately from both header tanks. Are divided into a plurality of compartments, and a downflow tube group and an upflow tube group are alternately provided in the leeward tube row and the windward tube row, respectively, and the refrigerant flowing from the refrigerant inlet It passes through and flows out from the refrigerant outlet.

  However, in the evaporators described in Patent Documents 1 and 2, the partition plate is positioned using grooves and slits formed in the portions forming the peripheral walls of both header tanks. When manufacturing different evaporators, it is necessary to prepare a member for forming the peripheral walls of both header tanks for each evaporator, and there is a problem that the types of parts to be prepared increase.

Japanese Patent Laid-Open No. 7-305990 Japanese Patent No. 3391339

  An object of the present invention is to provide an evaporator that solves the above-described problems and can reduce the types of components that are prepared during manufacturing.

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

1) Between a pair of header tanks arranged at intervals in the vertical direction, the longitudinal direction is directed in the vertical direction, and the plural are arranged at intervals in the horizontal direction with the width direction directed in the ventilation direction Two rows of flat heat exchange tubes are provided at intervals in the ventilation direction, and each header tank is laid down in the ventilation direction with the longitudinal direction oriented in the left-right direction. A side header portion and a windward header portion, and one row of tubes is disposed between the leeward side and the windward header portion of both header tanks, and both ends of the heat exchange tubes are on the leeward side of both header tanks and is connected to the windward side header section, together with the refrigerant inlet is provided at one end of the leeward header portion of the upper header tank, also the coolant outlet provided in the same end and the refrigerant inlet in the windward header section The tube row connected to the leeward header portion of both header tanks and the tube row connected to the windward header portion are each composed of a plurality of heat exchange tubes, and the refrigerant flows from the top to the bottom in the heat exchange tubes. The downflow tube group and the upflow tube group consisting of a plurality of heat exchange tubes and in which the refrigerant flows from the bottom to the top are alternately provided, and the refrigerant flowing from the refrigerant inlet passes through the heat exchange tubes of all the tube groups. In the evaporator that is made to flow out from the refrigerant outlet,
Each header tank includes 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, and the first member and the second member. And a third member having a plate-like partition portion that is disposed between and separates the leeward side and the windward side header portions of both header tanks into two spaces in the vertical direction, and the heat exchange tube is leeward of the upper header tank. Leading to the lower space of the side and the windward header part and leading to the leeward side of the lower header tank and the upper space of the windward header part,
The upper and lower spaces of the leeward upper and lower header portions and the upper and lower spaces of the leeward upper and lower header portions are respectively communicated by communication holes formed in the partition portion of the third member, and the leeward upper header of the upper header tank internal upper and lower spaces of the parts and on the windward header section is divided into a plurality of compartments in the lateral direction by the inserted split plate split plate slit formed in the partition portion of the third member Rutotomoni, vertically The compartments that are lined up are communicated with each other through communication holes formed in the partition part of the third member ,
The split plate slit is formed across the entire width in the ventilation direction of the partition portion between two heat exchange tubes adjacent in the left-right direction, and the split plate slit formed in the partition portion of the third member, and the split plate An evaporator in which at least one heat exchange tube is arranged between the communication hole closest to the slit for use .

2) The other end portions of the leeward side and the leeward side header portion of the upper header tank having the refrigerant inlet and the refrigerant outlet, and the both end portions of the leeward side and the windward side header portion of the other header tank are respectively partitioned portions of the third member. The evaporator according to 1), wherein the evaporator is closed by a closing plate inserted in a closing plate slit formed in the above.

3) There is a slit for the flow control plate in the partition between the upper space where the heat exchange tube of the upflow tube group in the lower header tank communicates with the lower space which communicates with the upper space via the communication hole. The evaporator according to the above 1) or 2), wherein the flow dividing control plate that is formed and the flow dividing control plate that equalizes the flow of the refrigerant to the heat exchange tubes of the upward flow tube group is inserted in the slit for the flow dividing control plate.

  4) A plurality of flow dividing control plates are provided, and a through hole is formed in the flow dividing control plate located on the most upstream side in the refrigerant flow direction so as to straddle both the upper and lower spaces. The evaporator according to 3) above, wherein the evaporator is a baffle portion for the flow of the refrigerant flowing in the space.

  5) A plurality of flow dividing control plates are provided, and a through hole is formed in a portion of the flow dividing control plate located on the most downstream side in the refrigerant flow direction in the lower space, and a portion below the through hole in the flow dividing control plate is The evaporator according to 3) or 4), wherein the evaporator is a baffle portion with respect to the flow of the refrigerant flowing in the lower space.

  6) A plurality of shunt control plates are provided, and a through hole is formed in the shunt control plate located on the most upstream side in the refrigerant flow direction so as to straddle both the upper and lower spaces. A through hole is formed in a portion of the flow control plate located in the most downstream side in the flow direction of the refrigerant and a portion of the flow control plate located in the lower space, and a portion below the through hole in the flow control plate is a baffle portion for the flow of the refrigerant flowing in the space. It becomes a baffle part for the flow of the refrigerant flowing in the lower space, and the lower end of the through hole of the diversion control plate on the most downstream side in the refrigerant flow direction is positioned below the lower end of the through hole of the diversion control plate on the most upstream side in the refrigerant flow direction The evaporator according to 3) above.

7) More than each flow control plate in the partition between the upper space where the heat exchange tubes of the upward flow tube group in the lower header tank communicate with the lower space which communicates with the upper space via the communication hole. The evaporator according to any one of the above 3) to 6), wherein a guide portion that guides the refrigerant upward by cutting and bending the partition portion is provided in a downstream portion of the refrigerant flow direction.

  8) The evaporator according to any one of the above items 3) to 7), wherein one shunt control plate is provided on each of the leeward side and the windward side header portion of the lower header tank.

9) with three tube group on the leeward side tube row are provided, two tube group on the windward side tube row is provided, the most recent group of tubes and a refrigerant inlet located closest to the coolant inlet of the leeward tube row The farthest tube group at the far position is the downflow tube group, the middle tube group is the upflow tube group, and the farthest tube group at the farthest position from the refrigerant outlet of the windward tube row is the downflow tube group. The most recent tube group closest to the refrigerant outlet is the upflow tube group .
A section farthest from the refrigerant inlet in the upper space on the leeward upper header section and a section farthest from the refrigerant outlet in the upper space on the windward upper header section are communicated, and from the refrigerant inlet in the lower space on the leeward lower header section. The evaporator according to any one of the above 1) to 8), wherein the farthest section and the section of the lower space of the windward lower header section are communicated.

10) The evaporator according to claim 9, wherein the length of the communication hole formed in the partition portion of the third member of the lower header tank is shorter than the width of the heat exchange tube in the ventilation direction.

According to the evaporators 1) to 10), each header tank is joined to the first member connected to the heat exchange tube, the first member, and the second member covering the opposite side of the first member from the heat exchange tube. And a third member having a plate-like partition portion disposed between the first member and the second member and partitioning the leeward side and the leeward header portion of both header tanks into two spaces in the vertical direction. And the heat exchange tube communicates with the leeward side of the upper header tank and the lower space of the leeward header part and with the leeward side of the lower header tank and the upper space of the leeward header part. inside at least one pair of upper and lower spaces of both the upper and lower spatial and windward vertical upper and lower spaces of the two header portions of the section is, by the division plate that is inserted into divided plate slit which is formed in the partition portion of the third member Because it is divided into a plurality of sections in the right direction, even if the position to place the partition plate to produce a different evaporator, there is no need to prepare a member for forming the peripheral wall of the header tanks for each evaporator, prepared There are fewer types of parts to do.

According to the evaporator of the above 2), the other end of the leeward side and the windward header part of the upper header tank having the refrigerant inlet and the refrigerant outlet, and both ends of the leeward side and the windward header part of the other header tank, Since each is closed by the closing plate inserted in the closing plate slit formed in the partitioning portion of the third member, the closing plate for closing the end portions of both header tanks can be easily arranged.

According to the evaporator of the above 3), the partition between the upper space where the heat exchange tube of the upward flow tube group in the lower header tank communicates with the lower space which communicates with the upper space via the communication hole A split flow control plate is formed in the slit, and a split flow control plate for equalizing the flow of the refrigerant to the heat exchange tubes of the up flow tube group is inserted into the split flow control plate slit. The amount of refrigerant flowing into all the heat exchange tubes constituting the can be made uniform. That is, when the upflow tube group and the downflow tube group are alternately provided as in the evaporator of 9) above, the upper space through which the heat exchange tube of the downflow tube group in the lower header tank communicates, and the From the lower space communicating with the upper space via the communication hole toward the upper space communicating with the heat exchange tube of the upward flow tube group in the lower header tank and the lower space communicating with the upper space via the communication hole The refrigerant flows in. This refrigerant is likely to flow to the upper space through which the heat exchange tubes of the upward flow tube group in the lower header tank communicate and the lower space communicated with the upper space through the communication hole due to inertial force. There is a possibility that the amount of refrigerant flowing into all the heat exchange tubes constituting the upflow tube group becomes non-uniform, and as a result, the temperature of the air passing through the evaporator becomes non-uniform. However, according to the evaporator of 3) above, the amount of refrigerant flowing into all the heat exchange tubes constituting the upflow tube group can be made uniform, so that the discharge temperature that is the temperature of the air that has passed through the evaporator is uniform. It becomes.

  According to the evaporator of the above 4), when the refrigerant having a high ratio of the liquid phase component flows into the heat exchange tubes constituting the upflow tube group, the refrigerant flows into all the heat exchange tubes constituting the upflow tube group. The amount can be made uniform effectively.

  According to the evaporator of the above 5), when the refrigerant having a large proportion of the gas phase component flows into the heat exchange tubes constituting the upflow tube group, the refrigerant flows into all the heat exchange tubes constituting the upflow tube group. The amount can be made uniform effectively.

  According to the evaporator of the above 7), the amount of refrigerant flowing into all the heat exchange tubes constituting the upflow tube group can be made more effective.

  According to the evaporator of the above 10), when the refrigerant of the refrigeration cycle including the evaporator is turned off and the refrigerant flows down from the heat exchange tube into the lower header tank, the refrigerant passes through the communication hole in the partition portion of the third member. Therefore, resistance is given to the refrigerant that flows down, and the time that the refrigerant remains in the heat exchange tube is extended. Therefore, the amount of refrigerant remaining in the heat exchange tube after the compressor is stopped increases, and the temperature rise of the air that has passed through the evaporator is suppressed in a short time.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially cutaway perspective view showing an overall configuration of an evaporator to which an evaporator according to the present invention is applied. It is the AA line expanded sectional view of Drawing 1 which omitted some. It is the BB line expanded sectional view of Drawing 1 which omitted some. It is the CC sectional view taken on the line of FIG. It is the DD 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. It is the EE sectional view taken on the line of FIG. It is a disassembled perspective view which shows the lower header tank of the evaporator of FIG. It is a figure which shows the flow of the refrigerant | coolant in the evaporator of FIG.

  Embodiments of the present invention will be described below with reference to the drawings. In the embodiment described below, the evaporator according to the present invention is applied to 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, front downstream of the air flowing through the air gap between each other adjacent heat exchange tubes (the direction indicated by the arrow X in the drawing), it is assumed that after this opposite.

  FIG. 1 shows the overall configuration of an evaporator to which the evaporator of the present invention is applied, FIGS. 2 to 8 schematically show the configuration, and FIG. 9 shows the flow of refrigerant in the evaporator of FIG.

  1 to 4, the evaporator (1) includes an aluminum upper header tank (2) and an aluminum lower header tank (3) that are spaced apart in the vertical direction, and both header tanks (2) (3 ) And a heat exchange core section (4) provided between the two.

  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 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 ( 14) tube rows (15) and (16) are arranged in two rows in the front-rear direction, and the ventilation gap between the adjacent heat exchange tubes (14) of each tube row (15) and (16) and the left and right Aluminum corrugated fins (17) are arranged outside the heat exchange tubes (14) at both ends so as to straddle the heat exchange tubes (14) of the front and rear tube rows (15) and (16), respectively. ), And aluminum side plates (18) are arranged on the outer sides of the corrugated fins (17) at both the left and right ends, respectively, and brazed to the corrugated fins (17). 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. The number of heat exchange tubes (14) in the leeward tube row (15) is equal to the number of heat exchange tubes (14) in the windward tube row (16). The corrugated fin (17) is shared by the heat exchange tubes (14) before and after the leeward tube row (15) and the windward tube row (16).

  In the leeward tube row (15), there are three tube groups (15A) (15B) (15C) consisting of a plurality of heat exchange tubes (14) spaced apart in the left-right direction from the right end to the left end. The windward tube row (16) is arranged side by side and includes two heat exchange tubes (14) arranged at intervals in the left-right direction (the tube group of the leeward tube row (15)). Tube groups (16A) and (16B) of a number one less than the number 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).

  As shown in FIGS. 2 to 6, the upper header tank (2) forms the lower part of the leeward upper header part (5) and the windward upper header part (6), and both the tube rows (15) (16 The aluminum first member (20) to which the heat exchange tube (14) is connected, and the first member (20) brazed to the opposite side of the first member (20) from the heat exchange tube (14) An aluminum second member (21) that covers (upper) and forms the upper part of the leeward upper header portion (5) and the windward upper header portion (6), and the first member (20) and the second member (21 ) And both front and rear partitions that divide the leeward upper header part (5) and the leeward upper header part (6) into upper and lower spaces (5a) (5b) (6a) (6b), respectively. A third member (22) made of aluminum having portions (23) and (24), a refrigerant inlet (12) and a refrigerant outlet (13), and the first to third members (20), (21) and (22) And an end member (25) brazed to the right end.

  The first member (20) is formed by pressing an aluminum brazing sheet having a brazing filler metal layer on both sides, and the lower part (the heat exchange tube (14) side of the leeward upper header part (5). The first header forming part (26) having a substantially U-shaped cross section that forms a portion), and the lower section (heat exchange tube (14) side part) that forms the lower part (heat exchange tube (14) side part) of the windward upper header part (6) The upper U-shaped second header forming part (27) and the connecting wall (28) for connecting the header forming parts (26) and (27) to each other and constituting the lower part of the connecting part (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 upper end of the heat exchange tube (14) is inserted into the tube insertion hole (29) and brazed to the first member (20) using the brazing material layer of the first member (20). .

  The second member (21) is formed by pressing an aluminum brazing sheet having a brazing filler metal layer on both sides, and the upper part of the leeward upper header part (5) (what is the heat exchange tube (14)? The first header forming part (31) with a substantially U-shaped cross section that forms the opposite side part) and the upper part of the upwind header part (6) (the part opposite to the heat exchange tube (14)) A second header forming portion (32) having a substantially U-shaped transverse cross section, and a connecting wall (33) for connecting the header forming portions (31) and (32) to each other and constituting the upper portion of the connecting portion (7) It becomes more. 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) excluding the portion provided with the communication path (36).

  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 windward upper header (6) are connected to the tube group (16A) of the windward tube row (16) in the left-right direction. ) (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) are connected to the first to third sections (43A), (43B), and (43C) of the lower space (5b), respectively. Yes. 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.

  The total length in the left-right direction of the first section (42A) (43A) and the second section (42B) (43B) in the leeward upper header section (5) is the fifth in the leeward upper header section (6). The length in the left and right direction of the third section (42C) (43C) of the leeward upper header part (5) is equal to the length in the left and right direction of the sections (46B) and (47B). It is equal to the length of the fourth section (46A) (47A) in the left-right direction.

  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 part of the front partition (23) between the second sections (42B) and (43B) where the communication hole (53) is not formed is the heat of the second tube group (15B), as will be described later. The refrigerant flowing into the second compartment (43B) of the lower space (5b) from the exchange tube (14) once flows to the right side and then passes through the communication hole (53) to pass through the second compartment (42B) of the upper space (5a). ) Is a baffle portion (55) for flowing in. 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 (46A) located farthest from the outlet (13) is communicated with the communication path (37).

  As shown in FIGS. 2 to 4, 7 and 8, 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). Has been. 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). In the slit (41), in the space space (8a) (8b) of the leeward lower header section (8), the tube group (15A) (15B) (15C) of the leeward tube row (15) in the left-right direction A dividing plate (44) for dividing the section (58A) (58B) and (59A) (59B), which is one less than the number, is inserted and brazed to the first to third members (20) (21) (22). Has been.

  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 total length of the first and second sections (58A), (58B), (59A), and (59B) in the leeward lower header section (8) in the left-right direction is the third section of the leeward lower header section (9). (61) It is equal to the length in the left-right direction of (62). The length in the left-right direction of the second section (58B) (59B) of the leeward lower header section (8) is the same as the length of the third section (42C) (43C) of the leeward upper header section (5). The left and right lengths of the first sections (58A) and (59A) of the leeward lower header section (8) are equal to the length of the fourth section (46A) and (47A) of the header section (6). The total length of the first section (42A) (43A) and the second section (42B) (43B) of the upper header section (5) and the fifth section (46B) of the upwind upper header section (6) ( 47B) is equal to the length in the left-right direction.

  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) and the upper and lower spaces (9b) (9a) of the leeward lower header portion (9) are located on the front side of the third member (22). 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. . 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 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).

  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 coolant passage hole (56), compartment (58A) (58B) By providing (59A), (59B), (61), and (62), the refrigerant flows from the first tube group (15A) and the third tube group (15C) (leeward side) farthest from the refrigerant inlet (12). Heat exchange tubes (14) (the farthest tube group in the tube row (15)) and the fourth tube group (16A) (the farthest tube group in the windward tube row (16)) farthest from the refrigerant outlet (13) ) Flow from top to bottom, and these tube groups (15A), (15C), and (16A) are downflow tube groups. 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) (the farthest tube group) located farthest from the refrigerant inlet (12) in the leeward tube row (15) and the 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 fourth tube group (16A) (farthest tube group) at the position is the same direction.

  Therefore, as shown in FIG. 9, the refrigerant flowing in from the refrigerant inlet (12) flows through the two paths and flows out from the refrigerant outlet (13) as follows. 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).

  Then, in the left and right range portion (63) provided with the second tube group (15B) which is the upward flow tube group in the leeward lower header portion (8) of the lower header tank (3), A first shunt control plate (64) is provided that can make the refrigerant flow into the total heat exchange tube (14) of the second tube group (15B) uniform by promoting the flow to the By promoting the upward flow of the refrigerant in the left and right range portion (65) provided with the fifth tube group (16B) which is the upward flow tube group in the header section (9), the fifth tube group A second diversion control plate (66) is provided that can equalize the amount of refrigerant flowing into the total heat exchange tube (14) of (16B).

  The first shunt control plate (64) is a fifth section (59B) of the upper and lower spaces (8b) (8a) of the leeward lower header section (8) in the front partition section (23) of the third member (22). 58B) It is inserted into a slit (67) that is long in the front-rear direction formed in the part that partitions the two, and is brazed to the first to third members (20), (21), and (22). The first shunt control plate (64) located upstream of the second shunt control plate (66) in the refrigerant flow direction passes through the first sections (59A) and (58A) of the upper and lower spaces (8b) and (8a). A hole (68) is formed, and a portion below the through hole (68) in the first diversion control plate (64) corresponds to the flow of the refrigerant flowing leftward in the first section (58A) of the lower space (8a). It is a baffle part (69). In the left part, which is the downstream part in the refrigerant flow direction from the first diversion control plate (64), the fifth section of the upper and lower spaces (8b) (8a) in the front partition (23) of the third member (22) ( 59B) (58B) is provided with a guide portion (71) for guiding the coolant upward by cutting and bending the portions that partition each other. The guide part (71) is provided on the left side edge of the through hole (72) formed by cutting and bending the front partition part (23), and has a middle part in the length direction. It has an arc shape that protrudes diagonally to the left. Accordingly, the refrigerant that has flowed to the left in the lower space (8b) through the through hole (68) of the first diversion control plate (64) passes through the through hole (72) by the guide portion (71). Guided to the second tube group (15B) side.

  The second diversion control plate (66) is provided in the third section (62) of the upper and lower spaces (9b) (9a) of the upwind lower header section (9) in the rear partition section (24) of the third member (22). (61) It is inserted into a slit (73) that is long in the front-rear direction formed in a part that partitions the two, and is brazed to the first to third members (20), (21), and (22). A through hole (74) is formed in a portion of the second diversion control plate (66) located downstream of the first diversion control plate (64) in the lower space (9a) except for the third section (61). The baffle portion (75) for the flow of the refrigerant flowing in the right direction in the third section (61) of the lower space (9a) is a portion below the through hole (74) in the second diversion control plate (66). It has become. The lower end of the through hole (74) of the second diversion control plate (66) is located below the lower end of the through hole (68) of the first diversion control plate (64). The third section of the upper and lower spaces (9b) (9a) in the rear partition (24) of the third member (22) in the right part, which is the downstream part in the refrigerant flow direction from the second shunt control plate (66). (62) A guide part (76) for guiding the refrigerant upward is provided by cutting and bending the part separating the parts. The guide part (76) is provided in a downward projecting manner on the right edge of the through hole (77) formed by cutting and bending the rear partition part (24), and is an intermediate part in the length direction. Has an arc shape projecting diagonally downward to the right. Accordingly, the refrigerant that has flowed to the left in the lower space (9a) through the through hole (74) of the second diversion control plate (66) passes through the through hole (77) by the guide portion (76). Guided to the fifth tube group (16B) side.

  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. During the operation of the car air conditioner, the refrigerant that has passed through the compressor, the condenser, and the expansion valve flows in from the refrigerant inlet (12) and out of the refrigerant outlet (13) through the above-described two paths, and the refrigerant is on the leeward side. The air passing through the ventilation gap of the heat exchange core (4) while flowing in the heat exchange tube (14) of the tube row (15) and in the heat exchange tube (14) of the windward tube row (16) Heat exchange is performed, the air is cooled, and the refrigerant flows out as a gas phase.

  In the first and second paths described above, the heat flows from the heat exchange tube (14) of the first tube group (15A) into the first section (59A) of the upper space (8b) of the leeward lower header portion (8). A part of the refrigerant flows to the left in the first section (59A) of the upper space (8b), and the second tube group (right side) on the upstream side (right side) in the refrigerant flow direction from the first diversion control plate (64). 15B) enters the heat exchange tube (14), flows upward in the heat exchange tube (14), and flows into the second section (43B) of the lower space (5b) of the leeward upper header section (5). . A part of the refrigerant flowing into the first section (59A) of the upper space (8b) of the leeward lower header portion (8) from the heat exchange tube (14) of the first tube group (15A) is part of the upper space (8b ) Flows to the left in the first section (59A), passes through the through hole (68) of the first diversion control plate (64), and then enters the heat exchange tube (14) of the second tube group (15B). Then, it flows upward in the heat exchange tube (14) and flows into the second section (43B) of the lower space (5b) of the leeward upper header section (5). After flowing from the heat exchange tube (14) of the first tube group (15A) into the first section (59A) of the upper space (8b) of the leeward lower header section (8), it passes through the communication hole (53). A part of the refrigerant flowing into the first section (58A) of the lower space (8a) flows to the left in the first section (58A) and is baffled by the baffle section (69) of the first diversion control plate (64). When resistance is applied, it is guided upward, passes through the through hole (68), flows into the first section (59A) of the upper space (8b), and flows leftward in the first space (59A). The second section (43B) enters the heat exchange tube (14) of the second tube group (15B), flows upward in the heat exchange tube (14), and is located in the lower space (5b) of the leeward upper header section (5). ) Flows in. It flows from the heat exchange tube (14) of the first tube group (15A) into the first section (59A) of the upper space (8b) of the leeward lower header section (8), and passes through the communication hole (53). A part of the refrigerant flowing into the first section (58A) of the space (8a) flows to the left in the first section (58A) and passes through the through hole (68) of the first diversion control plate (64). After that, it is guided upward by the guide part (71), flows into the first section (59A) of the upper space (8b) through the through hole (72), and flows leftward in the first space (59A). However, it enters the heat exchange tube (14) of the second tube group (15B), flows upward in the heat exchange tube (14), and enters the second section (5b) of the lower space (5b) of the leeward upper header section (5). 43B). Furthermore, it flows from the heat exchange tube (14) of the first tube group (15A) into the first section (59A) of the upper space (8b) of the leeward lower header portion (8) and passes through the communication hole (53). Part of the refrigerant that has flowed into the first section (58A) of the lower space (8a) flows to the left in the first section (58A), and passes through the through-hole (68) of the first diversion control plate (64). After passing through the lower part of the guide part (71) and passing through the communication hole (53), it enters the second section (59B) of the upper space (8b) and flows leftward in the second section (59B). However, it enters the heat exchange tube (14) of the second tube group (15B), flows upward in the heat exchange tube (14), and enters the second section (5b) of the lower space (5b) of the leeward upper header section (5). 43B).

  Further, in the first and second paths, from the heat exchange tube (14) of the fourth tube group (16A) to the third section (62) of the upper space (9b) of the windward lower header portion (9). After flowing in, the refrigerant flowing into the third section (61) of the lower space (9a) through the communication hole (53) and the heat exchange tube (14) of the third tube group (15C) from the leeward lower header section (8) After entering the second section (59B) of the upper space (8b), through the rear communication hole (53), and into the second section (58B) of the lower space (8a), then the communication path (37 ) Passes through the third section (61) of the lower space (9a) of the upwind lower header section (9) and flows to the right in the third section (62) of the lower space (9a). The resistance is applied by the baffle portion (75) of the second diversion control plate (66), so that the second diversion control plate (66 in the third section (62) passes through the through hole (74) while flowing upward. ) Enters the downstream side of the refrigerant flow direction, and flows into the upper space (9b) through the communication hole (53). , Enters the heat exchange tube (14) of the fifth tube group (16B), flows upward in the heat exchange tube (14), and enters the fifth section (6b) of the lower space (6b) of the windward upper header portion (6). It flows into 47B). In the same manner as described above, the refrigerant flowing into the third section (61) of the lower space (9a) of the upwind lower header section (9) moves rightward in the third section (61) of the lower space (9a). The flow is given resistance by the baffle portion (75) of the second diversion control plate (66), so that the second diversion control plate (3) in the third section (61) passes through the through hole (74) while flowing upward. 66) enters the downstream side in the refrigerant flow direction, is guided upward by the guide portion (76), passes through the through hole (77), flows into the third section (62) of the upper space (9b), It flows into the heat exchange tube (14) of the fifth tube group (16B) while flowing to the right in the compartment (62), flows upward in the heat exchange tube (14), and flows into the upwind header section (6). It flows into the fifth section (47B) of the lower space (6b). Further, in the same manner as described above, the refrigerant flowing into the third section (61) of the lower space (9a) of the windward lower header section (9) passes through the third section (61) of the lower space (9a) to the right. 2nd flow control in the third section (61) through the through hole (74) while flowing upward, by applying resistance by the baffle part (75) of the second flow control plate (66). The refrigerant enters the downstream side of the plate (66) in the refrigerant flow direction, passes through the lower portion of the guide portion (76), passes through the communication hole (53), flows into the third section (62) of the upper space (9b), It flows into the heat exchange tube (14) of the fifth tube group (16B) while flowing in the right direction in the third section (62), flows upward in the heat exchange tube (14), and flows upward in the upwind header section (6 ) Flows into the fifth section (47B) of the lower space (6b).

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

(1): Evaporator
(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
(15A) (15B) (15C): First to third tube groups
(16): Windward tube row
(16A) (16B): Fourth to fifth tube groups
(20): First member
(21): Second member
(22): Third member
(23): Front partition
(24): Rear partition
(41): Slit
(42A) (42B) (42C) (43A) (43B) (43C): First to third sections of the leeward upper header section
(44) (45): Dividing plate
(46A) (46B) (47A) (47B): First to second sections of the upwind header section
(51): Slit
(52): Closure plate
(53): Communication hole
(58A) (58B) (59A) (59B): First to second sections of the leeward lower header section
(61) (62): Third section of the upwind header
(64) (66): Shunt control board
(67) (73): Slit
(68) (74): Through hole
(71) (76): Guide section

Claims (10)

Between a pair of header tanks arranged at intervals in the vertical direction, a plurality of flats arranged at intervals in the horizontal direction with the longitudinal direction oriented in the vertical direction and the width direction directed in the ventilation direction Two rows of tube-shaped heat exchange tubes are provided at intervals in the ventilation direction, and each header tank is provided side by side in the ventilation direction with the longitudinal direction oriented in the left-right direction. And a windward header portion, and one tube row is disposed between the leeward side and the windward header portion of both header tanks, and both ends of the heat exchange tube are located on the leeward side and windward side of both header tanks. is connected to the header unit, together with the refrigerant inlet is provided at one end of the leeward header portion of the upper header tank, the coolant outlet is provided also to the same end and the refrigerant inlet in the windward header section al The tube row connected to the leeward header portion of both header tanks and the tube row connected to the windward header portion are each composed of a plurality of heat exchange tubes, and the refrigerant flows down from the top through the heat exchange tubes. A flow tube group and a plurality of heat exchange tubes and an upflow tube group in which the refrigerant flows from the bottom to the top are alternately provided, and the refrigerant flowing from the refrigerant inlet passes through the heat exchange tubes of all the tube groups. In the evaporator which is made to flow out from the refrigerant outlet,
Each header tank includes 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, and the first member and the second member. And a third member having a plate-like partition portion that is disposed between and separates the leeward side and the windward side header portions of both header tanks into two spaces in the vertical direction, and the heat exchange tube is leeward of the upper header tank. Leading to the lower space of the side and the windward header part and leading to the leeward side of the lower header tank and the upper space of the windward header part,
The upper and lower spaces of the leeward upper and lower header portions and the upper and lower spaces of the leeward upper and lower header portions are respectively communicated by communication holes formed in the partition portion of the third member, and the leeward upper header of the upper header tank internal upper and lower spaces of the parts and on the windward header section is divided into a plurality of compartments in the lateral direction by the inserted split plate split plate slit formed in the partition portion of the third member Rutotomoni, vertically The compartments that are lined up are communicated with each other through communication holes formed in the partition part of the third member ,
The split plate slit is formed across the entire width in the ventilation direction of the partition portion between two heat exchange tubes adjacent in the left-right direction, and the split plate slit formed in the partition portion of the third member, and the split plate An evaporator in which at least one heat exchange tube is arranged between the communication hole closest to the slit for use . The other end portions of the leeward side and the windward side header portion of the upper header tank having the refrigerant inlet and the refrigerant outlet, and both end portions of the leeward side and the windward side header portion of the other header tank are respectively formed in the partition portion of the third member. The evaporator according to claim 1, wherein the evaporator is closed by a closing plate inserted into the closed closing plate slit. A slit for a flow control plate is formed in the partition between the upper space where the heat exchange tube of the upward flow tube group in the lower header tank communicates and the lower space which communicates with the upper space via the communication hole. The evaporator according to claim 1 or 2, wherein a diversion control plate for equalizing the diversion of the refrigerant to the heat exchange tubes of the upflow tube group is inserted into the slit for the diversion control plate. A through-hole that spans both the upper and lower spaces is formed in the diversion control plate that is located most upstream in the refrigerant flow direction, and a portion below the through hole in the diversion control plate is in the lower space. The evaporator according to claim 3, wherein the evaporator is a baffle portion with respect to the flow of the refrigerant flowing through the air. A through hole is formed in a portion of the diversion control plate located on the most downstream side in the refrigerant flow direction, and the lower portion of the diversion control plate is lower than the through hole. The evaporator according to claim 3 or 4, wherein the evaporator is a baffle portion with respect to the flow of the refrigerant flowing inside. A through-hole that spans both the upper and lower spaces is formed in the diversion control plate that is located most upstream in the refrigerant flow direction, and a portion below the through hole in the diversion control plate is in the lower space. A through hole is formed in a portion of the flow dividing control plate located at the most downstream side in the flow direction of the refrigerant in the lower space, and a portion below the through hole in the flow dividing control plate is the lower space. It becomes a baffle part for the flow of refrigerant flowing inside, and the lower end of the through hole of the flow dividing control plate on the most downstream side in the refrigerant flow direction is positioned below the lower end of the through hole of the flow dividing control plate on the most upstream side in the refrigerant flow direction The evaporator according to claim 3. Refrigerant flows more than the respective flow control plates in the partition between the upper space where the heat exchange tubes of the upward flow tube group in the lower header tank communicate with the lower space which communicates with the upper space via the communication holes. The evaporator according to any one of claims 3 to 6, wherein a guide portion that guides the refrigerant upward by cutting and bending the partition portion is provided at a downstream portion in the direction. The evaporator according to any one of claims 3 to 7, wherein one diversion control plate is provided on each of the leeward side and the windward side header portion of the lower header tank. With three tube group on the leeward side tube row is provided, provided with two tube group on the windward side tube row, farthest from the group of tubes and the coolant inlet recently located closest to the coolant inlet of the leeward tube row The farthest tube group at the bottom is the downflow tube group, the middle tube group is the upflow tube group, and the farthest tube group farthest from the refrigerant outlet in the windward tube row is the downflow tube group. evaporator according to any one of claims 1 to 8 recently closest to the coolant outlet tube group is Ru upflow tube group der with certain. The evaporator according to claim 9, wherein the length of the communication hole formed in the partition portion of the third member of the lower header tank is shorter than the width of the heat exchange tube in the ventilation direction.

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