JP2005069670A - Heat exchanger and evaporator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an evaporator having good heat exchanging capability. <P>SOLUTION: The evaporator comprises a heat exchange core part 4 provided with a plurality of heat exchanging tubes 9, a refrigerant inlet header part 7 and a refrigerant outlet header part 6 arranged on one end side of the heat exchanging tubes 9, and a refrigerant inflow side header part 7 and a refrigerant outflow side header part 8 arranged on the other end side of the heat exchanging tubes 9. This heat exchanger is configured so that the inner space of the refrigerant outlet header part 6 is partitioned into two spaces 6a and 6b by a resistance plate 26 for flow diversion, and the heat exchanging tubes 9 are connected to the refrigerant outlet header part 6 to face the inside of the one space 6b, and that a plurality of refrigerant passing holes 27A to 27D having different shapes and/or sizes are formed in the resistance plate 26 for flow diversion. Added to the outer surface of the refrigerant outlet header part 6 are identification marks 28A to 28D discriminating the positions of the refrigerant passing holes 27A to 27D and indicating their shapes and/or sizes. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an evaporator used for, for example, a car air conditioner.

  In this specification and claims, the term “aluminum” includes aluminum alloys in addition to pure aluminum.

  Conventionally, as a evaporator for a car air conditioner, a plurality of flat hollow bodies formed by brazing peripheral edges with a pair of plate-shaped plates facing each other are arranged in parallel, and a corrugated fin with a louver between adjacent flat hollow bodies A so-called laminated evaporator, in which the above is disposed and brazed to a flat hollow body, has been widely used. However, in recent years, there has been a demand for further reduction in size and weight and performance of the evaporator.

  As an evaporator that satisfies such a requirement, the applicant firstly arranges a plurality of rows of heat exchange pipes that are arranged at intervals and arranged in a row in the ventilation direction. A configured heat exchange core portion, a refrigerant inlet header portion arranged on the downstream side in the ventilation direction on one end side of the heat exchange tube and connected to the heat exchange tubes of at least one row of heat exchange tubes, and a heat exchange tube Is disposed on the upstream side in the ventilation direction of the refrigerant inlet header on one end of the refrigerant, and is disposed on the other end of the heat exchange pipe with the refrigerant outlet header connected to the heat exchange pipe of at least one row of heat exchange pipes. And a refrigerant inflow header connected to the refrigerant inlet header and a refrigerant inflow header on the other end of the heat exchange pipe upstream of the refrigerant inflow header in the ventilation direction. All connected to the department And a refrigerant outlet header part to which a heat exchange pipe of the exchange pipe group is connected. The refrigerant outlet header part is partitioned into two upper and lower spaces by a shunt resistor plate formed integrally with the refrigerant outlet header part. In addition, there has been proposed an evaporator in which a heat exchange pipe is connected to the refrigerant inlet header so as to face one space, and a refrigerant passage hole is formed in the shunting resistance plate (see, for example, Patent Document 1). In this evaporator, the refrigerant inlet header portion and the refrigerant outlet header portion are provided by partitioning the inside of the first tank by the partition wall, and the refrigerant inflow header portion by partitioning the inside of the second tank by the partition wall. And a refrigerant outflow side header portion, and a through hole is formed in the partition wall of the second tank, so that the refrigerant inflow side header portion and the refrigerant outflow side header portion are communicated with each other. This evaporator is manufactured by combining and temporarily fixing the constituent members and brazing all the constituent members together.

  And in the evaporator of patent document 1, the refrigerant | coolant flow volume of all the heat exchange pipes which comprise each heat exchange pipe group is equalize | homogenized by the effect | action of the resistance plate for a shunt, and, thereby, the heat exchange performance of an evaporator is improved. It is illustrated.

  By the way, in order to equalize the refrigerant circulation amount of all the heat exchange tubes, as described in FIG. 15 and FIG. 16 of Patent Document 1, a plurality of pieces having different shapes and / or sizes are provided on the shunt resistor plate. The refrigerant passage hole may be formed asymmetrically in the length direction of the refrigerant outlet header.

However, when assembling each component during the manufacture of the evaporator, the position of the coolant passage hole cannot be confirmed from the outside, and therefore there is a risk of assembling in the opposite direction. In this case, the effect of making the amount of refrigerant in all the heat exchange tubes uniform is hardly obtained, and the cooling performance of the evaporator may be extremely lowered.
Japanese Patent Laid-Open No. 2003-75024

  An object of the present invention is to solve the above problems and provide a heat exchanger and an evaporator excellent in heat exchange performance.

  1) A heat exchanger comprising two header parts arranged at a distance from each other and a plurality of heat exchange tubes arranged in parallel between both header parts and having both end parts connected to both header parts A heat exchange pipe is connected to the header portion so that at least one header portion is partitioned into two spaces by the shunt resistor plate and faces one space, and a refrigerant passage hole is formed in the shunt resistor plate. Is formed, and an identification mark for determining the position of the refrigerant passage hole is attached to the outer surface of the header portion having the shunt resistor plate.

  2) A plurality of coolant passage holes of different shapes and / or sizes are formed in the shunt resistor plate, and an identification mark attached to the outer surface of the header portion having the shunt resistor plate is added to the position of the coolant passage hole. The heat exchanger according to the above 1), which represents the shape and / or size.

  3) The heat exchanger according to 2) above, wherein an identification mark is provided at a position corresponding to each refrigerant passage hole, and a different identification mark is attached according to the shape and / or size of the refrigerant passage hole.

  4) The heat exchanger according to any one of 1) to 3) above, wherein the identification mark is a recess formed on the outer surface of the header portion.

  5) The heat exchanger according to any one of 1) to 4) above, wherein the identification mark is a convex portion formed on the outer surface of the header portion.

  6) A heat exchange core section formed by arranging a plurality of heat exchange tube groups arranged in a row along a ventilation direction, and ventilation at one end of the heat exchange tube A refrigerant inlet header portion that is arranged on the downstream side in the direction and to which the heat exchange pipes of at least one row of heat exchange pipe groups are connected, and is arranged on the upstream side in the ventilation direction of the refrigerant inlet header portion on one end side of the heat exchange pipe, And the refrigerant | coolant exit header part to which the heat exchange pipe | tube of the heat exchange pipe group of at least 1 row was connected, and the heat exchange pipe | tube arrange | positioned at the other end side of a heat exchange pipe and connected to the refrigerant | coolant inlet header part are connected. The refrigerant inflow header section is connected to the heat exchange pipe of the heat exchange pipe group arranged on the upstream side in the ventilation direction of the refrigerant inflow header section on the other end side of the heat exchange pipe and connected to the refrigerant outlet header section. And a refrigerant outflow side header portion, In the evaporator in which the medium inflow side header portion and the refrigerant outflow side header portion are communicated with each other, the refrigerant outlet header portion is partitioned into two spaces by a shunt resistor plate and heat exchange is performed so as to face one space. An evaporator in which a pipe is connected to the refrigerant outlet header portion, a refrigerant passage hole is formed in the shunt resistor plate, and an identification mark for identifying the position of the refrigerant passage hole is attached to the outer surface of the refrigerant outlet header portion.

  7) A plurality of refrigerant passage holes having different shapes and / or sizes are formed in the shunt resistor plate, and an identification mark attached to the outer surface of the refrigerant outlet header having the shunt resistor plate is located at the position of the refrigerant passage hole. In addition, the evaporator according to the above 6), which is adapted to represent a shape and / or a size.

  8) The evaporator according to 7) above, wherein an identification mark is provided at a position corresponding to each refrigerant passage hole, and different identification marks are attached according to the shape and / or size of the refrigerant passage hole.

  9) The evaporator according to any one of 6) to 8), wherein the identification mark is a recess formed on the outer surface of the refrigerant outlet header.

  10) The evaporator according to any one of 6) to 9), wherein the identification mark is a convex portion formed on the outer surface of the refrigerant outlet header.

  11) The evaporator according to any one of 6) to 10), wherein the refrigerant inlet header and the refrigerant outlet header are integrated.

  12) The evaporator according to 11) above, wherein a refrigerant inlet header portion and a refrigerant outlet header portion are provided by partitioning one tank with a partition wall.

  13) The tank includes a first member to which the heat exchange pipe is connected and a second member brazed to a portion of the first member opposite to the heat exchange pipe. The evaporator according to 12) above, wherein the diverting resistance plate is integrally formed and an identification mark is attached to the outer surface of the second member.

  14) The evaporator according to 13) above, wherein the first member is made of an aluminum brazing sheet having a brazing material layer on at least one side.

  15) The evaporator according to 13) or 14) above, wherein the second member is made of an aluminum extruded profile.

  16) A method for producing an evaporator as described in 13) above, wherein a second member having a partition wall and a shunting resistance plate is extruded from aluminum, and the second member is shredded by pressing. An evaporator manufacturing method comprising forming a coolant passage hole in a plate and simultaneously attaching an identification mark to an outer surface of a second member.

  17) A refrigeration cycle comprising a compressor, a condenser, and an evaporator, wherein the evaporator is the evaporator according to any one of 1) to 15) above.

  18) A vehicle in which the refrigeration cycle described in 17) above is mounted as an air conditioner.

  According to the heat exchanger of the above 1), when assembling the respective components when manufacturing the heat exchanger, the position of the refrigerant passage hole formed in the shunt resistor plate is set to the outside of the header portion based on the identification mark. Therefore, it is possible to reliably prevent the header portion from being assembled in the reverse direction. Therefore, the amount of refrigerant in all the heat exchange tubes can be made uniform by the action of the shunt resistor plate, and the heat exchange performance of the heat exchanger becomes excellent.

  According to the heat exchangers of 2) and 3) above, when assembling each of the above constituent members even when a plurality of refrigerant passage holes having different shapes and / or sizes are formed in the shunt resistor plate, the header portion Can be reliably prevented from being assembled in the opposite direction.

  According to the heat exchangers 4) and 5), the identification mark can be attached to the outer surface of the header portion relatively easily.

  According to the evaporator of the above 6), when assembling each constituent member during the manufacture of the evaporator, the position of the refrigerant passage hole formed in the shunt resistor plate is determined from the outside of the refrigerant outlet header portion based on the identification mark. Therefore, it is possible to reliably prevent the refrigerant outlet header portion from being assembled in the reverse direction. Therefore, the amount of refrigerant in all the heat exchange tubes can be made uniform by the action of the shunt resistor plate, and the evaporator has excellent heat exchange performance.

  According to the evaporators of the above 7) and 8), even when a plurality of refrigerant passage holes having different shapes and / or sizes are formed in the shunt resistor plate, the refrigerant outlet header portion is assembled when assembling each of the above components. Can be reliably prevented from being assembled in the opposite direction.

  According to the evaporators of the above 9) and 10), the identification mark can be attached to the outer surface of the header portion relatively easily.

  According to the evaporators of the above 11) and 12), the number of parts of the whole evaporator can be reduced.

  According to the evaporator 13), since the partition wall and the shunt resistor plate are formed integrally with the second member, the operation of providing the partition wall and the shunt resistor plate in the tank is simplified.

  According to the evaporator of the above 14), the brazing material layer on at least one side of the first member is used to braze the first member and the second member to form a tank, and at the same time, heat exchange with the first member Since the heat exchange tube can be connected to the tank by brazing the tube, the manufacturing operation is simplified.

  According to the evaporator of 15) above, the second member can be manufactured relatively easily.

  According to the evaporator manufacturing method of 16), the second member is pressed to form a coolant passage hole in the shunt resistor plate, and at the same time, the identification mark is attached to the outer surface of the second member. By confirming that it is attached, it can be seen that the coolant passage hole is reliably formed.

  Embodiments of the present invention will be described below with reference to the drawings. In the following description, the top, bottom, left and right in FIG. 1 are referred to as top, bottom, left and right, respectively, and the downstream side of the air flowing through the ventilation gap between adjacent heat exchange tubes of the heat exchange tube group (indicated by arrow X in FIG. 1). The direction shown (upper side in FIG. 2) is the front, and the opposite side is the rear.

  1 and 2 show the overall configuration of the evaporator according to the present invention, FIGS. 3 and 4 show the configuration of the main part, and FIG. 5 shows how the refrigerant flows in the evaporator according to the present invention.

  In FIG. 1, the evaporator (1) is arranged between an aluminum refrigerant inlet / outlet tank (2) and an aluminum refrigerant turn side tank (3), which are spaced apart in the vertical direction, and between the tanks (2) and (3). And a heat exchange core part (4) provided in

  The refrigerant inlet / outlet tank (2) includes a refrigerant inlet header portion (5) located on the front side (downstream side in the ventilation direction) and a refrigerant outlet header portion (6) located on the rear side (upstream side in the ventilation direction). . The refrigerant turn side tank (3) includes a refrigerant inflow side header portion (7) located on the front side and a refrigerant outflow side header portion (8) located on the rear side.

  The heat exchange core section (4) includes a plurality of rows of heat exchange pipe groups (11) composed of a plurality of aluminum heat exchange pipes (9) arranged in parallel at intervals in the left-right direction. Here, two rows are arranged. The ventilation gaps between adjacent heat exchange tubes (9) in each heat exchange tube group (11) and the outside of the heat exchange tubes (9) at the left and right ends of each heat exchange tube group (11) are made of aluminum. Corrugated fins (12) are arranged and brazed to the heat exchange pipe (9). Aluminum side plates (13) are respectively arranged outside the corrugated fins (12) at the left and right ends and brazed to the corrugated fins (12). The upper and lower ends of the heat exchange pipe (9) of the front heat exchange pipe group (11) are connected to the refrigerant inlet header section (5) and the refrigerant inflow header section (7), and the rear heat exchange pipe group (11) The upper and lower ends of the heat exchange pipe (9) are connected to the refrigerant outlet header (6) and the refrigerant outflow side header (8).

  As shown in FIGS. 2 and 3, the refrigerant inlet / outlet tank (2) is formed of an aluminum brazing sheet having a brazing filler metal layer on at least the outer surface (lower surface) and is connected to a heat exchange pipe (9). A first member (14), a second member (15) made of a bare material formed from an extruded aluminum material and covering the upper side of the first member (14), and an aluminum cap (16 ) (17).

  The first member (14) has, on both front and rear side portions thereof, a curved portion (18) having a small cross-sectional arc shape with a central portion protruding downward. A plurality of tube insertion holes (19) that are long in the front-rear direction are formed in each bending portion (18) at intervals in the left-right direction. The tube insertion holes (19) of the front and rear curved portions (18) are at the same position in the left-right direction. A rising wall (18a) is integrally formed over the entire length at the front edge of the front curved portion (18) and the rear edge of the rear curved portion (18). A plurality of through holes (22) are formed in the flat portion (21) between the curved portions (18) of the first member (14) at intervals in the left-right direction.

  The second member (15) has a substantially m-shaped cross section opened downward, and is provided at the center between the front and rear walls (23) and the front and rear walls (23) extending in the left-right direction and extending in the left-right direction. In addition, a partition wall (24) for partitioning the refrigerant inlet / outlet tank (2) into two front and rear spaces, and two protruding upwards that integrally connect the front and rear walls (23) and the upper ends of the partition wall (24), respectively. A substantially arc-shaped connecting wall (25). The lower end portions of the rear wall (23) and the partition wall (24) are integrally connected over the entire length by a shunting resistance plate (26).

  A plurality of refrigerant passage holes (27A), (27B), (27C), and (27D) having different shapes and / or sizes are formed in the shunt resistor plate (26) at intervals in the left-right direction. In the illustrated example, a plurality of the same shape and size, here three first refrigerant passage holes (27A), and a plurality of the same shape and the same size as the first refrigerant passage hole (27A), three here. Second refrigerant passage hole (27B), third refrigerant passage hole (27C) having different shape and size from both refrigerant passage holes (27A) and (27B), and first and second refrigerant passage holes (27A) and (27B) And a fourth coolant passage hole (27D) having the same shape and different size. Then, each refrigerant passage hole (27A) (27B) (27B) is located at a position corresponding to each refrigerant passage hole (27A) (27B) (27C) (27D) on the outer surface of the connecting wall (25) of the second member (15). Identification marks (28A) (28B) (28C) (28D) for identifying the positions of 27C) and (27D) are attached. The identification marks (28A), (28B), (28C), and (28D) are different in accordance with the shape and / or size of each refrigerant passage hole (27A), (27B), (27C), and (27D). That is, the identification marks (28A), (28B), (28C), and (28D) of the first to fourth refrigerant passage holes (27A), (27B), (27C), and (27D) are different, and the shape and size are the same. The same identification mark (28A) (28B) is attached to each of the refrigerant passage holes (27A) (27B). Accordingly, the identification marks (28A) (28B) (28C) (28D) represent the shape and / or size in addition to the positions of the refrigerant passage holes (27A) (27B) (27C) (27D). ing. The identification marks (28A), (28B), (28C), and (28D) are made of, for example, concave portions or convex portions formed on the outer surface of the connecting wall, or a mixture thereof. The identification marks (28A), (28B), (28C), and (28D) are not limited to those shown in the drawings, and can be changed as appropriate.

  The lower end of the partition wall (24) protrudes downward from the lower ends of the front and rear walls (23), and a plurality of lower walls protrude downward and are fitted into the through holes (22) of the first member (14). The protrusions (24a) are integrally formed with an interval in the left-right direction. The protrusion (24a) is formed by cutting a predetermined portion of the partition wall (24).

  The second member (15) is formed by extruding both the front and rear walls (23), the partition wall (24), the connecting wall (25), and the shunting resistance plate (26), and then press-working to separate the second member (15). At the same time that the refrigerant passage hole (27A) (27B) (27C) (27D) is formed in the resistance plate (26), the identification mark (28A) (28B) (28C) (28D) is attached, and the partition wall (24) Is cut off to form a protrusion (24a).

  Each cap (16) (17) is formed from a bare material by pressing, forging or cutting, and the left and right ends of the first and second members (14) (15) are fitted into the inner surface in the left-right direction. A recess is formed. The right cap (17) has a refrigerant flow (17a) leading into the refrigerant inlet header (5) and a refrigerant flow leading to a portion above the shunt resistor plate (26) in the refrigerant outlet header (6). An outlet (17b) is formed. Also, an aluminum refrigerant inlet / outlet member (29) having a refrigerant inlet (29a) leading to the refrigerant inlet (17a) and a refrigerant outlet (29b) leading to the refrigerant outlet (17b) is brazed to the right cap (17). ing.

  Then, both the members (14) and (15) are caulked with the protrusions (24a) of the second member (15) being inserted into the through holes (22) of the first member (14), and the first member (14). With the rising wall (18a) of the second member and the front and rear walls (23) of the second member (15) engaged, they are brazed together using the brazing material layer of the first member (14). The caps (16), (17) are brazed to the first and second members (14), (15) using a sheet-like brazing material to form the refrigerant inlet / outlet tank (2), and the second member The front side of the partition wall (24) of (15) is the refrigerant inlet header (5), and the rear side of the partition wall (24) is the refrigerant outlet header (6). The refrigerant outlet header (6) is divided into upper and lower spaces (6a) and (6b) by a shunt resistor plate (26), and these spaces (6a) and (6b) are formed in the refrigerant passage hole (27A) ( 27B) (27C) (27D). The lower space (6b) is the first space where the heat exchange pipe (9) of the rear heat exchange pipe group (11) faces, and the upper space (6a) is the second space from which the refrigerant flows out. The refrigerant outlet (17b) of the right cap (17) communicates with the upper space (6a) of the refrigerant outlet header (6).

  As shown in FIG. 4, the refrigerant turn side tank (3) is formed of an aluminum brazing sheet having a brazing filler metal layer on at least the outer surface (upper surface), and a plate-shaped first member to which a heat exchange pipe (9) is connected. (31), a second member (32) made of a bare material formed from an aluminum extruded profile and covering the lower side of the first member (31), and an aluminum cap (33) for closing the left and right opening It becomes more.

  The top surface (3a) of the refrigerant turn-side tank (3) is such that the central part in the front-rear direction becomes the highest part (34) and gradually decreases from the highest part (34) toward the front and rear sides. The cross section is formed in a circular arc shape. Grooves (35) extending from the front and rear sides of the highest portion (34) of the top surface (3a) to the front and rear sides (3b) are spaced in the left and right direction on both sides of the refrigerant turn side tank (3). A plurality are formed.

  The first member (31) has an arcuate cross-sectional shape with the center portion in the front-rear direction protruding upward, and the hanging wall (31a) is integrally formed over the entire length on both front and rear edges. The upper surface of the first member (31) is the top surface (3a) of the refrigerant turn side tank (3), and the outer surface of the hanging wall (31a) is the front and rear side surfaces (3b) of the refrigerant turn side tank (3). ing. On both front and rear sides of the first member (31), a groove (35) is formed from the highest position (34) in the center in the front-rear direction to the lower end of the hanging wall (31a). Long pipe insertion holes (36) are formed in the front-rear direction between adjacent grooves (35) in the front and rear side portions excluding the highest position (34) at the front-rear center of the first member (31). . The front and rear tube insertion holes (36) are at the same position in the left-right direction. A plurality of through holes (37) are formed at intervals in the left-right direction at the highest position (34) at the center in the front-rear direction of the first member (31). The first member (31) is formed by simultaneously forming the hanging wall (31a), the groove (35), the tube insertion hole (36), and the through hole (37) by pressing the aluminum brazing sheet. .

  The second member (32) has a substantially w-shaped cross section opened upward, and extends between the front and rear walls (38) extending in the left-right direction and curved upward toward the outer side in the front-rear direction. A vertical partition wall (39) provided in the center and extending in the left-right direction and partitioning the refrigerant turn-side tank (3) into two front and rear spaces, and lower ends of both the front and rear walls (38) and the partition wall (39) It consists of two connecting walls (41) that connect the two together.

  The upper end of the partition wall (39) protrudes upward from the upper ends of both the front and rear walls (38), and a plurality of upper walls protrude upward and are fitted into the through holes (37) of the first member (31). The protrusions (39a) are integrally formed with an interval in the left-right direction. Further, a coolant passage notch (39b) is formed between adjacent protrusions (39a) on the partition wall (39) from the upper edge thereof. The protrusion (39a) and the notch (39b) are formed by cutting a predetermined portion of the partition wall (39).

  The second member (32) is formed by integrally extruding both the front and rear walls (38), the partition wall (39), and the connecting wall (41), and then cutting the partition wall (39) to form a protrusion (39a) and a notch Manufactured by forming (39b).

  Each cap (33) is formed from a bare material by pressing, forging or cutting, and has recesses in which the left and right ends of the first and second members (31) (32) are fitted in the inner surface in the left-right direction. Have.

  Then, both the members (31) and (32) are caulked with the projection (39a) of the second member (32) being inserted into the through hole (37), and the hanging wall (31a) of the first member (31) With the front and rear walls (38) of the second member (32) engaged with each other, they are brazed together using the brazing material layer of the first member (31), and both caps (33) are in sheet form. A refrigerant turn side tank (3) is formed by brazing the first and second members (31), (32) using a brazing material, and is formed from the partition wall (39) of the second member (32). Also, the front side is a refrigerant inflow side header portion (7), and the rear side from the partition wall (39) is a refrigerant outflow side header portion (8). The upper end opening of the notch (39b) of the partition wall (39) of the second member (32) is closed by the first member (31), thereby forming a refrigerant passage hole (42). The coolant passage hole (42) is formed in the partition wall (39) instead of the upper end opening of the notch (39b) formed in the partition wall (39) closed by the first member (31). It can consist of a through hole.

  The heat exchange pipe (9) constituting the front and rear heat exchange pipe group (11) is made of a bare material formed of an aluminum extruded profile, and has a wide flat shape in the front and rear direction, and a plurality of parts extending in the length direction therein. The refrigerant passages are formed in parallel. The front and rear end walls of the heat exchange tube (9) have an arc shape protruding outward. The heat exchange pipe (9) of the front heat exchange pipe group (11) and the heat exchange pipe (9) of the rear heat exchange pipe group (11) are arranged to be at the same position in the left-right direction. The upper end of the heat exchange pipe (9) is inserted into the pipe insertion hole (19) of the first member (14) of the refrigerant inlet / outlet tank (2) and uses the brazing material layer of the first member (14). The first member (14) is brazed, and the lower end of the first member (31) is inserted into the pipe insertion hole (36) of the first member (31) of the refrigerant turn side tank (3). The first member (31) is brazed using the layer. Then, the heat exchange pipe (9) of the front heat exchange pipe group (11) communicates with the refrigerant inlet header section (5) and the refrigerant inflow header section (7), and heat exchange of the rear heat exchange pipe group (11) The pipe (9) communicates with the refrigerant outlet header part (6) and the refrigerant outlet header part (8).

  Here, the tube height which is the thickness in the left-right direction of the heat exchange tube (9) is 0.75 to 1.5 mm, the tube width which is the width in the front-rear direction is 12 to 18 mm, and the wall thickness of the peripheral wall is 0.175 to 0.275 mm, the thickness of the partition wall partitioning the refrigerant passages is 0.175 to 0.275 mm, the pitch of the partition walls is 0.5 to 3.0 mm, and the curvature radius of the outer surfaces of the front and rear end walls is 0.35 to 0 .75 mm is preferable.

  As the heat exchange pipe (9), instead of the one made of an aluminum extruded shape, one in which a plurality of refrigerant passages are formed by inserting inner fins into an aluminum electric sewing pipe may be used. . Also, two flat wall forming parts formed by rolling an aluminum brazing sheet having a brazing filler metal layer on both sides and connected via connecting parts, and the opposite side of the connecting part in each flat wall forming part A side wall forming portion integrally formed in a protruding shape from the side edges of the flat wall forming portion, and a plurality of partition wall forming portions integrally formed in a protruding shape from the two flat wall forming portions at a predetermined interval in the width direction of the flat wall forming portion. It is also possible to use a plate having a partition wall formed by bending a plate with a hairpin shape at the connecting portion, butting the side wall forming portions with each other and brazing each other. In this case, a corrugated fin made of a bare material is used.

  The corrugated fin (12) is formed in a corrugated shape using an aluminum brazing sheet having a brazing filler metal layer on both sides, and a plurality of the corrugated fins (12) connected in parallel in the front-rear direction to the connecting portion connecting the wave head and the wave bottom. A louver is formed. The corrugated fin (12) is shared by both the front and rear heat exchange tube group (11), and the width in the front and rear direction is the front side edge and the rear side heat exchange of the heat exchange tube (9) of the front side heat exchange tube group (11). The intervals between the rear edge of the heat exchange tube (9) of the tube group (11) are substantially equal. Here, the linear distance between the wave head and the wave bottom which is the fin height of the corrugated fin (12) is 7.0 mm to 10.0 mm, and the pitch of the connecting portion which is also the fin pitch is 1.3 to 1.8 mm. It is preferable that In addition, instead of sharing one corrugated fin between the front and rear heat exchange tube groups (11), corrugated fins are arranged between adjacent heat exchange tubes (9) of both heat exchange tube groups (11). It may be.

  The evaporator (1) is manufactured by temporarily fastening a combination of the constituent members and brazing all the constituent members together.

  The evaporator (1) constitutes a refrigeration cycle together with a compressor and a condenser, and is mounted on a vehicle such as an automobile as a car air conditioner.

  In the evaporator (1) described above, as shown in FIG. 5, the gas-liquid mixed phase two-layer refrigerant that has passed through the compressor, the condenser, and the decompression means is supplied to the refrigerant inlet (29a) and the right cap (29) of the refrigerant inlet / outlet member (29). 17) enters the refrigerant inlet header (5) of the refrigerant inlet / outlet tank (2) through the refrigerant inlet (17a), and divides all the heat exchange tubes (9) in the front heat exchange tube group (11). ) Flows into the refrigerant passage.

  The refrigerant that has flowed into the refrigerant passages of all the heat exchange tubes (9) flows downward in the refrigerant passages and enters the refrigerant inflow side header portion (7) of the refrigerant turn side tank (3). The refrigerant that has entered the refrigerant inflow side header portion (7) enters the refrigerant outflow side header portion (8) through the refrigerant passage hole (42) of the partition wall (39).

  The refrigerant that has entered the refrigerant outflow side header section (8) is divided and flows into the refrigerant passages of all the heat exchange pipes (9) in the rear heat exchange pipe group (11), and the flow direction is changed to change the refrigerant. It flows upward in the passage and enters the lower space (6b) of the refrigerant outlet header (6) of the refrigerant inlet / outlet tank (2). Here, resistance is imparted to the refrigerant flow by the shunt resistor plate (26), so that the refrigerant outflow side header (8) to all the heat exchange tubes (9) in the rear heat exchange tube group (11). Is also made uniform, and the flow from the refrigerant inlet header (5) to all the heat exchange tubes (9) in the front heat exchange tube group (11) is also made more uniform. As a result, the refrigerant circulation amount of all the heat exchange tubes (9) in both heat exchange tube groups (11) is made uniform.

  Next, the refrigerant passes through the refrigerant passage holes (27A) (27B) (27C) (27D) of the shunt resistor plate (26) and enters the upper space (6a) of the refrigerant outlet header (6), and the cap (17 ) Through the refrigerant outlet (17b) and the refrigerant outlet (29b) of the refrigerant inlet / outlet member (29). Then, while the refrigerant flows through the refrigerant passage of the heat exchange pipe (9) of the front heat exchange pipe group (11) and the refrigerant passage of the heat exchange pipe (9) of the rear heat exchange pipe group (11), the ventilation gap Is exchanged with the air flowing in the direction indicated by the arrow X in FIG.

  At this time, condensed water is generated on the surface of the corrugated fin (12), and this condensed water flows down to the top surface (3a) of the refrigerant turn side tank (3). The condensed water flowing down to the top surface (3a) of the refrigerant turn side tank (3) enters the groove (35) by the capillary effect, flows in the groove (35), and flows from the outer end in the front-rear direction to the refrigerant turn side tank. Drop down (3). In this way, freezing of condensed water due to accumulation of a large amount of condensed water between the top surface (3a) of the refrigerant turn side tank (3) and the lower end of the corrugated fin (12) is prevented, and as a result, the evaporator (1 ) Performance degradation is prevented.

  In the above embodiment, between the refrigerant inlet header portion (5) and the refrigerant inflow side header portion (7) of both tanks (2) and (3), and the refrigerant outlet header portion (6) and the refrigerant outflow side header portion ( 8) is provided with one heat exchange tube group (11), but this is not a limitation, and the refrigerant inlet header (5) of both tanks (2) (3) and the refrigerant inflow side One or two or more heat exchange pipe groups (11) may be provided between the header part (7) and between the refrigerant outlet header part (6) and the refrigerant outflow side header part (8). . In the above embodiment, the refrigerant inlet / outlet tank (2) is on the upper side and the refrigerant turn side tank (3) is on the lower side. It may be used with the turn side tank (3) on top.

  Furthermore, in the said embodiment, although the evaporator was demonstrated, this invention is applicable also to another heat exchanger, for example, a capacitor | condenser.

1 is a partially cutaway perspective view showing an overall configuration of an evaporator according to the present invention. It is also a plan view. It is a disassembled perspective view of a refrigerant in / out side tank. It is a disassembled perspective view of a refrigerant | coolant turn side tank. It is a figure which shows how the refrigerant | coolant flows in an evaporator.

Explanation of symbols

(1): Evaporator
(2): Refrigerant inlet / outlet tank
(3): Refrigerant turn side tank
(4): Heat exchange core
(5): Refrigerant inlet header
(6): Refrigerant outlet header
(6a): Upper space
(6b): Lower space
(7): Refrigerant inflow side header
(8): Refrigerant outflow header
(9): Heat exchange pipe
(11): Heat exchange tube group
(14): First member
(15): Second member
(24): Partition wall
(26): Shunt resistor plate
(27A) (27B) (27C) (27D): Refrigerant passage hole
(28A) (28B) (28C) (28D): Identification mark

Claims (18)

A heat exchanger comprising two header portions spaced apart from each other and a plurality of heat exchange tubes arranged in parallel between both header portions and having both end portions connected to both header portions. And
A heat exchange pipe is connected to the header portion so that at least one header portion is partitioned into two spaces by a shunt resistor plate and faces one space, and a refrigerant passage hole is formed in the shunt resistor plate, A heat exchanger in which an identification mark for identifying the position of the refrigerant passage hole is attached to the outer surface of the header portion having the shunt resistor plate. A plurality of coolant passage holes with different shapes and / or sizes are formed in the shunt resistor plate, and an identification mark attached to the outer surface of the header portion having the shunt resistor plate is added to the position of the coolant passage hole. 2. A heat exchanger according to claim 1 adapted to represent and / or size. The heat exchanger according to claim 2, wherein an identification mark is provided at a position corresponding to each refrigerant passage hole, and a different identification mark is attached according to the shape and / or size of the refrigerant passage hole. The heat exchanger according to any one of claims 1 to 3, wherein the identification mark comprises a recess formed on the outer surface of the header portion. The heat exchanger according to any one of claims 1 to 4, wherein the identification mark comprises a convex portion formed on the outer surface of the header portion. A heat exchange core section formed by arranging a plurality of rows of heat exchange pipes arranged in a row along a ventilation direction, and a downstream side in the ventilation direction on one end side of the heat exchange pipe And a refrigerant inlet header part to which heat exchange pipes of at least one row of heat exchange pipe groups are connected, at one end side of the heat exchange pipe, arranged upstream of the refrigerant inlet header part in the ventilation direction, and at least Refrigerant outlet header part to which heat exchange pipes of one row of heat exchange pipe groups are connected, and refrigerant to which the heat exchange pipes arranged on the other end side of the heat exchange pipes and connected to the refrigerant inlet header part are connected. The heat exchange pipe of the heat exchange pipe group that is arranged on the upstream side in the ventilation direction of the refrigerant inflow side header part on the other end side of the heat exchange pipe and connected to the refrigerant outlet header part is connected to the inflow side header part. And a refrigerant outflow header. In an evaporator with inlet-side header section and the refrigerant outlet side header portion is communicated,
The inside of the refrigerant outlet header is divided into two spaces by a shunt resistor plate, and a heat exchange pipe is connected to the refrigerant outlet header portion so as to face one space, and a refrigerant passage hole is formed in the shunt resistor plate. An evaporator in which an identification mark for determining the position of the refrigerant passage hole is attached to the outer surface of the refrigerant outlet header. A plurality of coolant passage holes having different shapes and / or sizes are formed in the shunt resistor plate, and an identification mark attached to the outer surface of the coolant outlet header having the shunt resistor plate is added to the position of the coolant passage hole. The evaporator according to claim 6, wherein the evaporator is adapted to represent a shape and / or a size. 8. The evaporator according to claim 7, wherein an identification mark is provided at a position corresponding to each refrigerant passage hole, and different identification marks are attached according to the shape and / or size of the refrigerant passage hole. The evaporator according to any one of claims 6 to 8, wherein the identification mark comprises a recess formed on the outer surface of the refrigerant outlet header. The evaporator according to any one of claims 6 to 9, wherein the identification mark comprises a convex portion formed on the outer surface of the refrigerant outlet header portion. The evaporator according to any one of claims 6 to 10, wherein the refrigerant inlet header portion and the refrigerant outlet header portion are integrated. The evaporator according to claim 11, wherein a refrigerant inlet header portion and a refrigerant outlet header portion are provided by partitioning one tank with a partition wall. The tank includes a first member to which the heat exchange pipe is connected and a second member brazed to a portion of the first member opposite to the heat exchange pipe. The second member has a partition wall and a shunt resistance. The evaporator according to claim 12, wherein the plate is integrally formed and an identification mark is attached to the outer surface of the second member. The evaporator according to claim 13, wherein the first member is made of an aluminum brazing sheet having a brazing material layer on at least one side. The evaporator according to claim 13 or 14, wherein the second member is made of an aluminum extruded profile. 14. A method of manufacturing an evaporator according to claim 13, wherein the second member having a partition wall and a shunt resistor plate is extruded, and the second member is pressed to pass the refrigerant through the shunt resistor plate. A method for manufacturing an evaporator, comprising forming an identification mark on an outer surface of a second member simultaneously with forming a hole. A refrigeration cycle comprising a compressor, a condenser, and an evaporator, wherein the evaporator is an evaporator according to any one of claims 1 to 15. A vehicle in which the refrigeration cycle according to claim 17 is mounted as an air conditioner.

Images