JP2009257658A - Heat exchanger and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat exchanger and a manufacturing method of the heat exchanger capable of achieving superior sealing performance by surely elastically deforming a seal member for sealing between a tank and a core plate. <P>SOLUTION: A radiator 1 comprises a packing 10 for sealing a joint section of an upper tank 2 and an upper core plate 4 by elastically deformed by receiving pressing force from the upper tank 2. The packing 10 has the annular shape in which strip sections having a width dimension smaller than a groove width dimension of a groove section 4a of the upper core plate 4 are continuously disposed, and is disposed on the upper core plate 4 while positioned in a state of being kept into contact with an inner wall 4d of the groove section 4a by elasticity. Projecting sections 2b of the upper tank 2 press roughly the center in the width direction of the strip sections of the packing 10 at the inner wall 4d side. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a heat exchanger having a seal structure between a tank and a core plate and a method for manufacturing the heat exchanger.

A conventional heat exchanger is known in which an elastic seal member is provided between a resin tank and a metal core plate (see, for example, Patent Document 1). In this conventional heat exchanger, an elastic seal member having a quadrangular cross section is installed on the outer peripheral edge portion formed in the groove shape of the core plate, and this elastic seal member is formed to protrude from the end surface of the outer peripheral edge portion of the tank. The protrusion is compressed and deformed. Further, in order to maintain this state, the claw portion of the core plate is caulked toward the elastic seal member, and the tank is pressed by the claw portion (see FIG. 8 described in Patent Document 1).
JP 58-224298 A (for example, FIG. 8)

  However, in the above-described conventional heat exchanger, the elastic seal member has a structure that is merely placed on the outer peripheral edge of the groove shape of the core plate. Therefore, the elastic seal member moves depending on the installation state of the core plate at the time of assembly. End up. Thereby, the positional relationship between the elastic seal member and the convex portion may not be in a predetermined state. In this case, there is a problem that the elastic seal member is compressed in a state shifted from a desired position and cannot exhibit a desired repulsive force, and a sufficient sealing property cannot be obtained.

  The present invention has been made in view of the above problems, and is a heat exchanger and a heat exchanger that realizes excellent sealing performance by reliably elastically deforming a seal member that seals between a tank and a core plate. An object is to provide a manufacturing method.

  The present invention employs the following technical means to achieve the above object. The first aspect of the heat exchanger includes a core portion (8) having a plurality of tubes (8a) through which a heat exchange medium flows, a core plate (4, 5) to which the plurality of tubes are connected, a plurality of The tank (2, 3) mounted on the core plate so as to communicate with the inside of the tube, and the above-mentioned joint that is elastically deformed by the pressing force received from the tank end (2a). And a seal member (10) for sealing the portion.

The core plate is formed with an annular groove (4a) in which a seal member is disposed, and a ridge (2b) protruding toward the seal member is provided at the end of the tank. ,
The seal member has an annular shape in which a band-like portion having a width (A) narrower than the groove width dimension (B) of the groove portion (4a) is continuous, and an inner wall (4d) and an outer wall ( 4e) is attached to the core plate in contact with at least one of
The ridge portion of the tank is characterized by pressing a substantially central portion in the width direction of the belt-like portion of the sealing member in contact with the tank.

  According to the present invention, since the seal member is positioned at the predetermined position in the groove and the center in the width direction of the seal member is pressed by the convex portion of the tank, the pressing force of the tank is sufficiently transmitted to the seal member. Thus, the seal member is surely and sufficiently compressed, and a sufficient repulsive force of the seal member is obtained. Therefore, it is possible to provide a heat exchanger that realizes excellent sealing performance by reliably elastically deforming the sealing member that seals between the tank and the core plate.

In addition, the annular groove is formed by a pair of opposed long sides extending in the longitudinal direction (41) and a pair of opposed short width sides extending so as to intersect the groove of the long side portion (41). A substantially rectangular shape including a groove portion of the portion (42),
The seal member is in a state where the seal member is in contact with either the inner wall (4d) or the outer wall (4e) of the groove portion in either the groove portion of the long side portion (41) or the groove portion of the short width side portion (42). It is preferably mounted on the plate.

  According to the present invention, since either one of the long side portion or the short width side portion of the seal member is fixed to the groove portion, the seal member may be positioned and attached in consideration of the restoring force of only one of the productivity. High heat exchanger.

  Further, the seal member is formed in a size in which the total length of the axis passing through the center of the cross section in a natural length state that is not elastically deformed is shorter than the total length of the axis passing through the center of the groove width of the annular groove portion, It is preferable that the core plate is mounted in a state where it abuts against the inner wall (4d) of the groove by a restoring force to return to the natural length.

  According to the present invention, a seal member designed in advance with the predetermined dimensions is prepared for the groove portion of the core plate, and the seal member is attached to the groove portion using the restoring force from the extended state. Accordingly, it is possible to secure the fixing force of the seal member according to the above, and to provide a stable fixing force of the seal member to the core plate. In addition, if the above dimensions of the seal member are set in consideration of the ease of attaching the seal member to the groove and the fixing force of the seal member to be secured, both the sealing performance and productivity of the tank and the core plate An excellent heat exchanger can be provided.

  Further, the seal member (10B) includes a latching portion (15) protruding outward from the outer peripheral wall surface (11b, 12b), and the seal member is hooked on the outer wall of the groove portion, whereby the seal member Is preferably attached to the core plate in contact with the outer wall of the groove.

  According to this invention, since a gap can be formed between the inner peripheral wall surface of the seal member and the inner wall of the groove portion, the work of attaching the seal member to the groove portion can be easily performed, and the productivity of the heat exchanger can be improved. it can. In addition, since the seal member is closer to the outer wall of the groove, a seal structure that is resistant to the internal pressure applied to the tank can be obtained.

  The sealing member preferably has a rectangular cross-sectional shape. According to the present invention, the area of the portion of the seal member that comes into contact with the groove portion is increased, and the seal member is more stably mounted before being pressed against the core plate by the tank, and is easily disposed at a predetermined position.

  Moreover, it is preferable that the front-end | tip part of the convex part of a tank is formed in the curved surface. According to this invention, since the seal member is directly pressed by a curved surface such as a substantially spherical surface, local pressure on the seal member can be reduced.

  A first invention relating to a method of manufacturing a heat exchanger includes a core portion (8) having a plurality of tubes (8a) through which a heat exchange medium flows, and a core plate (4, 5) to which the plurality of tubes are connected. The tank (2, 3) attached to the core plate so as to communicate with the inside of the plurality of tubes, and the belt-like portion are formed in an annular shape, and at the junction between the tank (2, 3) and the core plate An annular seal member (10) that is provided and seals the joint by elastic deformation by a pressing force received from an end (2a) of a tank. .

  This manufacturing method includes a core plate forming step for forming the core plate into a predetermined shape so as to include an annular groove (4a) in which a seal member is disposed, and a core part assembly for assembling at least the core part and the core plate. A sealing member mounting step of positioning the seal member in contact with at least one of the inner wall (4d) and the outer wall (4e) forming the groove, and mounting the groove on the groove, and sealing from the end of the tank A tank mounting step of pressing the protruding protrusion (2b) projecting toward the member against the mounted seal member to elastically deform the seal member to seal the joint and to fix the tank to the core plate. It is out.

  Furthermore, in the tank mounting step, the tank is mounted on the core plate so that the convex strip portion presses the substantially center in the width direction of the strip-shaped portion of the positioned seal member.

  According to the present invention, the seal member is positioned at a predetermined position in the groove portion, and the seal member is elastically deformed by pressing the substantially central portion in the width direction of the belt-shaped portion of the seal member with the protruding strip portion of the tank. The seal member is sufficiently transmitted to the member, and the seal member is surely and sufficiently compressed, so that a sufficient repulsive force of the seal member can be exhibited. Therefore, the seal member that seals between the tank and the core plate can be attached at a predetermined position, and the seal member that seals between the tank and the core plate is reliably elastically deformed to realize excellent sealing performance. An exchange manufacturing method is obtained.

Further, in the core plate forming step, the annular groove portion is extended so as to intersect with the groove portion of the longitudinal side portion (41) extending in a pair of opposing longitudinal directions and the groove portion of the longitudinal side portion (41). And a groove portion of a pair of short width side portions (42) facing each other,
In the seal member mounting step, the seal member is brought into contact with the inner wall (4d) of the groove portion in either the groove portion of the long side portion (41) or the groove portion of the short width side portion (42) to form an annular groove portion. It shall be installed.

  According to the present invention, since either one of the long side portion or the short width side portion of the seal member is fixed to the groove portion, the seal member can be positioned and attached in consideration of the restoring force of only one of the productivity. A high heat exchanger manufacturing method can be obtained.

  Further, the sealing member mounting step includes a sealing member extending step of extending the annular seal member to a predetermined size, and a sealing member arranging step of disposing the annular seal member in the annular groove portion in a state of being extended to a predetermined size. The seal member is mounted in contact with the inner wall of the groove portion by removing the force required for the extension of the seal member in a further extended state and trying to restore the seal member. .

  According to the present invention, the fixing force required to fix the seal member to the groove portion can be easily obtained by mounting the seal member on the inner wall of the groove portion using the degree of contraction of the seal member that shrinks from a predetermined size. Can be secured. Moreover, the efficiency of the process of attaching the seal member to the groove can be improved.

  Further, the seal member is formed in a size in which the total length of the axis passing through the center of the cross section in a natural length state that is not elastically deformed is shorter than the total length of the axis passing through the center of the groove width of the annular groove portion, In the seal member mounting step, the seal member is mounted in the annular groove portion by a restoring force for returning from the stretched state to the natural length state.

  According to the present invention, by using the seal member designed in advance with the predetermined dimensions for the groove portion of the core plate, the fixing force required to fix the seal member to the groove portion according to the restoring force of the seal member. Can be secured. Further, by adjusting the dimensions of the seal member, it is possible to provide a stable fixing force of the seal member with respect to the core plate, and it is possible to efficiently perform the process of attaching the seal member to the groove portion. Thereby, the manufacturing method of the heat exchanger excellent in both the sealing performance of a tank and a core plate and productivity can be provided.

  In addition, the code | symbol in the bracket | parenthesis of each said means is an example which shows a corresponding relationship with the specific means of embodiment mentioned later.

  A plurality of modes for carrying out the present invention will be described below with reference to the drawings. In each embodiment, parts corresponding to the matters described in the preceding embodiment may be denoted by the same reference numerals, and redundant description may be omitted. In the case where only a part of the configuration is described in each embodiment, the other parts of the configuration are the same as those described previously. In addition to the combination of parts specifically described in each embodiment, the embodiments may be partially combined as long as the combination is not particularly troublesome.

(First embodiment)
The heat exchanger of the present invention is characterized by a structure for sealing between the tank and the core plate, and is between an internal fluid as a heat exchange medium flowing inside the tube and an external fluid passing around the tube. And can be applied to, for example, a radiator, an intercooler, and the like. In the present embodiment, a preferred example will be described in which a cooling water (internal fluid) for cooling an engine (not shown) flows in the tube, and this cooling water is used in the radiator 1 in which heat is exchanged with air of an external fluid. 1st Embodiment which is one Embodiment of this invention is described using FIGS.

  FIG. 1 is a front view showing an outline of a radiator 1 of the present embodiment. FIG. 2 is a side view of the radiator 1 of FIG. 1 as viewed in the II direction. FIG. 3 is a partial cross-sectional view of the radiator 1 taken along section line III-III in FIG. 4 is a partial cross-sectional view of the radiator 1 taken along the cutting plane IV-IV in FIG. The X direction shown in FIG. 1 and FIG. 4 is the longitudinal direction with the long width of the tank part and the core plate, the stacking direction of the tubes or fins, or the left-right direction. The Y direction shown in FIGS. 2 and 3 is the short width direction in which the width of the tank portion and the core plate is short, or the flow direction of external fluid.

  The radiator 1 includes an upper tank 2, a core part assembly and a lower tank 3. The core part assembly includes an upper core plate 4, a core part 8, and a lower core plate 5. Each component is made of metal such as aluminum or aluminum alloy, and is joined by brazing. Each component may be a clad material having a brazing material applied to its surface. The core portion 8 includes a plurality of tubes 8a and a plurality of heat radiation fins 8b, and each portion is joined by brazing. The core portion 8 is a heat exchange portion that releases heat of the cooling water flowing through each tube 8a to the atmosphere via the plurality of tubes 8a and the fins 8b.

  A large number of tubes 8a are arranged in parallel at a predetermined interval with the longitudinal direction thereof being the vertical direction, and fins 8b formed in a wave shape are arranged between the adjacent tubes 8a along the longitudinal direction of the tubes 8a. . It arrange | positions so that the tube 8a and the fin 8b may be laminated | stacked alternately. The tube 8a is a flat tube formed by combining plate-like members each formed into a predetermined shape. The fin 8b is formed by forming a flat plate into a wave shape, and extends in the longitudinal direction of the tube 8a. The fins 8b are provided with a large number of louvers (not shown) cut and raised so as to form a predetermined angle with respect to the flow direction of external fluid (the Y direction in the figure). The heat transfer coefficient is improved.

  Both the upper tank 2 and the lower tank 3 are parts of substantially the same shape made of resin or metal such as aluminum or aluminum alloy. The upper tank 2 is an elongated bowl-shaped body that is open at the bottom and closed at the top in the installed state. The lower tank 3 is an elongate bowl-shaped body that is open at the top and closed at the bottom. The upper tank 2 is provided with an inflow pipe 21 that forms a cooling water inlet at one end of both ends in the longitudinal direction (X direction in the figure), and the lower tank 3 is the other of both ends in the longitudinal direction (X direction in the figure). An outflow pipe 31 that forms an outlet for cooling water is provided on the end side.

  The inflow pipe 21 and the outflow pipe 31 are substantially equivalent cylindrical pipe members. The inflow pipe 21 is brazed and joined to a hole opened on one end side of the side surface of the upper tank 2, and the outflow pipe 31 is brazed and joined to a hole opened on the other end side of the side face of the lower tank 3. The cooling water is circulated inside each of the upper tank 2, the plurality of tubes 8 a, and the lower tank 3.

  The upper core plate 4 is a member formed by molding a flat plate made of metal such as aluminum or aluminum alloy into a rectangular shape (this rectangular shape includes a complete rectangle and a substantially rectangular shape). The upper core plate 4 is joined and integrated with the opened portion at the lower end of the upper tank 2 so as to cover the lower portion of the upper tank 2. The upper core plate 4 has as many insertion holes 4c as the number of tubes 8a into which the upper ends of the plurality of tubes 8a are inserted. The plurality of tubes 8 a are connected and fixed to the upper core plate 4 by brazing and joining the entire outer periphery of the upper end portion in a state where the upper ends of the tubes 8 a are fitted in the insertion holes 4 c of the upper core plate 4.

  The upper core plate 4 includes a groove portion 4a formed in an annular shape so as to surround a plurality of insertion holes 4c arranged in the longitudinal direction (X direction in the drawing) at a predetermined interval. The groove portion 4a is provided on the entire circumference in the vicinity of the outer peripheral edge portion of the upper core plate 4, and the outer wall 4e standing upward, the inner side wall 4d standing up separated from the outer wall 4e, and the outer wall 4e and inner wall. 4d is a recess formed by a bottom wall 4f that connects 4d. The annular groove 4a has a substantially rectangular outer shape (a shape in which the outer peripheral edge forms a rectangle), and a long side portion 41 (hereinafter referred to as an upper core plate) extending in a pair of longitudinal directions facing in parallel. And a pair of short width side portions 42 (hereinafter referred to as the short width side of the core plate) extending in the short width direction so as to intersect with the groove portions of the long side portion 41 and facing each other in parallel. And a groove portion of the portion 42). The portions where the pair of long side portions 41 and the pair of short side portions 42 intersect are the four corner portions 43 in the groove 4a.

  The upper end of the outer wall 4e is formed so as to partially protrude. When the upper core plate 4 is viewed from the side, a plurality of upper ends of the outer side walls 4e are formed such that claw portions 4b having a predetermined width are arranged with the recesses in between. The plurality of claw portions 4 b are bent inward when the upper tank 2 and the upper core plate 4 are assembled, and function to fix the upper tank 2 to the upper core plate 4.

  The lower core plate 5 has substantially the same shape, configuration and material as the upper core plate 4. That is, the lower core plate 5 is joined and integrated with the opened portion at the upper end of the lower tank 3 so as to cover the upper portion of the lower tank 3. The lower core plate 5 has as many insertion holes as the number of tubes 8a into which the lower ends of the plurality of tubes 8a are inserted. The plurality of tubes 8 a are connected and fixed to the lower core plate 5 by brazing and joining the entire outer periphery of the lower ends with the lower ends thereof fitted in the insertion holes of the lower core plate 5. Similar to the upper core plate 4, the lower core plate 5 is bent inward with the above-described grooves formed so as to surround a plurality of insertion holes arranged in the longitudinal direction (X direction in the figure) with a predetermined interval. And the aforementioned claw portion formed on the outer wall for fixing the lower tank 3 to the lower core plate 5.

  Thus, the upper core plate 4 and the lower core plate 5 are integrated so as to sandwich the upper and lower sides of the plurality of tubes 8a. Further, the core portion 8 is provided with fins 8b between the adjacent tubes 8a, and a side plate that holds the tubes 8a and the fins 8b so as to reinforce them on the outermost side in the direction in which the tubes 8a and the fins 8b are stacked (X direction). 6 and 7 are attached.

  As shown in FIGS. 3 and 4, a packing 10, which is a seal member, is interposed between the outer peripheral edge 2 a at the lower part of the upper tank 2 and the groove 4 a of the upper core plate 4. The outer peripheral edge 2 a of the upper tank and the groove 4 a of the upper core plate 4 are also a joint between the upper tank 2 and the upper core plate 4. The packing 10 is elastically deformed by being sandwiched between the end face of the outer peripheral edge 2a and the bottom wall 4f of the groove 4a, thereby filling the gap between the upper tank 2 and the upper core plate 4 and the upper tank 2 It is in close contact with the core plate 4 and sealed so that the cooling water in the upper tank 2 does not leak outside. At the lower part of the upper tank 2, a collar portion 2 c that protrudes outward integrally with the outer peripheral edge portion 2 a is provided on the entire circumference.

  On the end surface of the outer peripheral edge portion 2a of the upper tank, a ridge portion 2b protruding from the end surface toward the packing 10 is provided on the entire circumference. The ridge portion 2 b is a streak-like protruding portion having a predetermined width, and locally increases the pressing pressure against the upper surface of the packing 10 to improve the sealing performance of the packing 10. As shown in FIG. 4, in the state where the upper tank 2 is fixed to the upper core plate 4, the protruding strip portion 2 b is approximately the center in the width direction of the band-shaped portion (rubber material) of the packing 10 (substantially the center is (Including the center). It is preferable that the protruding portion 2b has a curved end at the tip and has a substantially semicircular cross section.

  Moreover, the packing 10 is arrange | positioned in the short width side part 12 so that it may be located near the inner wall 4d rather than the outer wall 4e of the groove part 4a. In other words, the packing 10 is provided such that the center of the cross section of the short width side portion 12 is inside (closer to the inner wall 4d) than the center of the groove width in the short width side portion 42 of the groove portion 4a.

  FIG. 5 is a plan view showing a state in which the packing 10 is attached to the upper core plate 4. As shown in FIG. 5, the packing 10 is installed on the entire circumference of a groove portion 4 a formed in an annular shape inside the outer wall 4 e of the upper core plate 4. The packing 10 is disposed so that the inner peripheral wall surface 11a in the long side portion 11 or the inner peripheral wall surface 12a in the short width side portion 12 is in contact with the inner wall surface 4d of the upper core plate 4 so that the position thereof does not move. Has been.

  The packing 10 is an elastic member formed in an annular shape having a predetermined compression ratio, and is an annular member formed by a continuous rubber material having a width A smaller than the groove width dimension B of the groove portion 4a. Is the body. The packing 10 is made of, for example, ethylene propylene rubber (EPDM), silicon rubber, or the like. Here, the annular packing 10 is not limited to a circular annular shape, and is a packing that includes a wide variety of shapes that are formed in a continuous manner without interruption. The packing 10 is preferably formed in accordance with the shape of the groove formed in each of the upper core plate 4 and the lower core plate 5 to be combined. Further, for example, when the groove portion of the core plate to be combined is a rectangular ring shape, a rectangular ring shape that can be attached to the groove portion (see FIG. 12), or a non-rectangular ring shape (for example, a circular shape or an elliptical shape). The packing 10 is employed.

  The packing 10 has a shape smaller than the size of the groove portion of the core plate with which the outer shape is combined. For example, the total length of the axial line passing through the center of the cross section of the packing 10 (hereinafter also referred to as the circumferential length of the axial line of the packing 10) is a natural state in which no external force is received (natural length state). A packing 10 shorter than the entire length of the axis (hereinafter also referred to as the circumferential length of the axis of the groove) is employed. The axis of the packing 10 is a line passing through the center of the cross section of the packing 10, and the axis of the groove is a line passing through the center of the width of the bottom wall constituting the groove. In other words, the circumferential length of the axis of the packing 10 is also the total length of the axis of the annular packing 10, and the circumferential length of the axis of the groove is also the total length of the axis of the annular groove. In this case, since the packing 10 has elasticity, it can be installed in the groove portion in a state where the packing 10 having an axial circumference shorter than that of the groove portion is extended. Then, after the packing 10 is stretched and installed, when the stretching force is removed, the packing 10 comes into close contact with the inner wall of the core plate due to the restoring force to shrink to the original state, and is positioned and held on the core plate. Is done.

  When the overall shape of the annular packing 10 is rectangular, the length of the pair of long side portions 11 (also referred to as the length in the longitudinal direction of the packing 10) in the natural length packing 10 is the long side portion 41 of the groove 4a. The packing 10 is formed so as to be shorter than the length (also referred to as the length in the longitudinal direction of the groove 4a). By adopting this configuration, the circumference of the axis of the packing 10 may be shorter than the circumference of the axis of the groove 4a.

  FIG. 6 is a plan view of the packing 10 in which the length Dp of the short width side portion 12 of the packing 10 is shorter than the length D of the short width side portion 42 of the groove. The packing 10 indicated by a two-dot chain line in FIG. 6 is in a state of being stretched to a length corresponding to the length D of the short width side portion 42 of the groove. As shown in FIG. 6, the length of the pair of short width side portions 12 (also referred to as the short width direction length of the packing 10) in the natural length packing 10 is the length of the short width side portion 42 of the groove portion 4a (groove portion 4a). The packing 10 is formed so as to be shorter than the length in the short width direction. By adopting this configuration, the circumference of the axis of the packing 10 may be shorter than the circumference of the axis of the groove 4a.

  Further, the packing may be shaped like a packing 10A shown in FIG. FIG. 7 is a plan view of the packing 10A in which the length Lp of the long side portion 11 of the packing 10A is shorter than the length L of the long side portion 41 of the groove. In FIG. 7, the packing 10 </ b> A indicated by a two-dot chain line is in a state of being stretched to a length corresponding to the length L of the long side portion 41 of the groove portion. As shown in FIG. 7, the packing 10 </ b> A has the length of the pair of long side portions 11 (also referred to as the length in the longitudinal direction of the packing 10) of the natural length packing 10 </ b> A as the length of the long side portion 41 of the groove portion 4 a (groove portion). 4a is also shorter than the longitudinal length of 4a). By adopting this configuration, the circumference of the axis of the packing 10 may be shorter than the circumference of the axis of the groove 4a.

  When the packing shown in FIG. 6 is used, the packing 10 contracts inward by the elastic force (in the direction of the arrow shown in FIG. 8A), and the inner circumference of the longitudinal side portion 11 thereof. The wall surface 11a is held so as to contact the inner wall 4d of the groove 4a. And the packing 10 is pressed and fixed to the groove part 4a by the outer peripheral edge part 2a of an upper tank in the state which the inner peripheral wall face 11a and the inner wall face 4d contacted. FIG. 8A is a partial cross-sectional view of the cut surface VIII-VIII in FIG. At this time, the packing 10 is arranged so that the longitudinal side portion 11 is positioned closer to the inner wall 4d than the outer wall 4e of the groove 4a. In other words, the center of the cross section of the long side portion 11 of the packing 10 (the center of the packing 10 on the alternate long and short dash line 14) is inside (closer to the inner wall 4d) than the center of the long side portion 41 of the groove 4a. Is provided. And the position of the protruding item | line part 2b with respect to the packing 10 is set to the position which presses the width direction approximate center part of the strip | belt-shaped part of the packing 10. As shown in FIG.

  When the packing shown in FIG. 7 is used, the packing 10A contracts inward (in the direction of the arrow shown in FIG. 9A) due to the elastic force, and the inner portion of the short width side portion 12 is reduced. The peripheral wall surface 12a is held so as to contact the inner wall 4d of the groove 4a. The packing 10A is pressed and fixed to the groove 4a by the outer peripheral edge 2a of the upper tank in a state where the inner peripheral wall 12a and the inner wall 4d are in contact with each other. Fig.9 (a) is a fragmentary sectional view when the cut surface IX-IX of FIG. 5 is seen in the arrow direction. At this time, the packing 10A is arranged in the short side portion 12 so as to be positioned closer to the inner wall 4d than the outer wall 4e of the groove 4a. In other words, in the packing 10A, the center of the cross section in the short width side portion 12 (the center of the packing 10 on the one-dot chain line 14) is inside (closer to the inner wall 4d) than the center in the long side portion 41 of the groove 4a. It is provided as follows. Similarly to the above, the position of the protrusion 2b with respect to the packing 10A is set to a position where the substantially central portion in the width direction of the band-like portion of the packing 10A is pressed.

  The packing may be arranged at the position shown in FIG. 8B or FIG. 9B in addition to the groove shown in FIG. 8A or 9A. Each of FIG. 8B and FIG. 9B is a partial cross-sectional view showing a case where the packing is mounted in contact with the outer wall 4e of the groove. At this time, the packing 10 is held such that the inner peripheral wall surface 11a of the long side portion 11 or the inner peripheral wall surface 12a of the short width side portion 12 abuts against the inner wall surface 4d of the groove portion 4a. The packing 10 is pressed and fixed to the groove 4a by the outer peripheral edge 2a of the upper tank in a state where the inner peripheral wall 11a or the inner peripheral wall 12a and the inner wall 4d are in contact with each other. At this time, the packing 10 is disposed so as to be positioned closer to the outer wall 4e than the inner wall 4d of the groove 4a. In other words, the center of the cross section of the packing 10 (the center of the packing 10 on the alternate long and short dash line 14) is provided so as to be on the outer side (closer to the outer wall 4e) than the center of the groove 4a. Even in this case, the position of the ridge portion 2b with respect to the packing 10 is set to a position where the substantially central portion in the width direction of the belt-like portion of the packing 10 is pressed.

  As described above, the packings 10 and 10A are positioned and arranged at predetermined positions with respect to the groove portion of the core plate, and the central portion in the width direction of the belt-like portion is pressed by the protruding strip portion 2b to exceed a certain level. Demonstrate resilience. Accordingly, the gap between the inner wall 4d and the bottom wall 4f and the outer peripheral edge 2a of the upper tank can be reliably filled without moving the packing during the assembly process of the radiator 1, thereby exhibiting a stable sealing property. be able to.

  FIG. 10 is a partial cross-sectional view showing a case where the packing 10 is mounted without contacting the inner wall 4d and the outer wall 4e of the groove. As shown in FIG. 10, when the packing 10 is held so that the inner peripheral wall surface 11a of the long side portion 11 is in contact with the inner side wall 4d of the groove portion 4a, the inner periphery of the short width side portion 12 thereof. The wall surface 12a may not be in contact with the inner wall 4d of the groove 4a. On the contrary, when the inner peripheral wall surface 12a of the short width side portion 12 of the packing 10 is held so as to contact the inner wall surface 4d of the groove portion 4a, the inner peripheral wall surface 11a of the long side portion 11 is inside the groove portion 4a. It may not be in contact with the wall 4d. At this time, similarly to the above, the position of the ridge portion 2b with respect to the packing 10 is set to a position where the substantially central portion in the width direction of the belt-like portion of the packing 10 (the upper end portion of the packing 10 through which the one-dot chain line 14 passes).

  As described above, the packing 10 is positioned by being in contact with at least one of the inner side wall 4d and the outer side wall 4e of the groove portion 4a on at least one of the long side portion 11 and the short side portion 12. It is attached to the core plate.

  The flow of the cooling water flowing through the radiator 1 having the above configuration will be described. The cooling water flowing out from the engine and flowing in through the inflow pipe 21 enters the upper tank 2 and is then distributed into a plurality of tubes 8 a connected to the upper core plate 4 to flow through the core portion 8. During the flow through the core 8, heat is exchanged with the external fluid (air) to dissipate heat and cool. The cooled cooling water flows out from the lower tank 3 through the outflow pipe 31 and flows toward the engine.

  Hereinafter, the effect of the radiator 1 of this embodiment which is an example of a heat exchanger will be described. The radiator 1 includes a packing 10 that is elastically deformed by receiving a pressing force from the upper tank 2 and seals a joint portion between the upper tank 2 and the upper core plate 4. The packing 10 has an annular shape in which a belt-like portion (rubber material) having a width of a dimension A narrower than the groove width dimension B of the groove portion 4a of the upper core plate 4 is continuous. The packing 10 is attached to the core plate and positioned in contact with at least one of the inner wall 4d and the outer wall 4e of the groove 4a. Further, in the state where the upper tank 2 is assembled to the upper core plate 4, the protruding strip portion 2 b presses the substantially central portion in the width direction of the band-shaped portion of the positioned portion of the packing 10.

  According to this configuration, since the packing is positioned at the predetermined position in the groove portion 4a and the center in the width direction of the packing is pressed by the ridge portion 2b of the tank, the pressing force of the tank is sufficiently transmitted to the packing. The packing is surely and sufficiently compressed, and a sufficient repulsive force of the packing against the core plate and the tank can be generated. Thereby, the product which ensures desired sealing performance is obtained.

  In addition, the annular groove 4a includes a pair of opposing long side portions 41 extending in the longitudinal direction and a pair of opposing short width side portions 42 extending so as to intersect with the groove portions of the long side portion 41. And a substantially rectangular shape including a groove portion. The packing 10 is attached to the core plate in a state where it is elastically contacted with either the inner wall 4d or the outer wall 4e of the groove 4a in either the groove of the long side portion 41 or the groove of the short width portion 42. Has been.

  When this configuration is adopted, since either one of the long side portion 11 or the short width side portion 12 of the packing is fixed at a predetermined position with respect to the groove portion 4a, the restoring force of the one side portion of the packing is taken into consideration. What is necessary is just to perform positioning and attachment work of the packing which carried out. Therefore, the productivity of the product can be further improved.

  The packing 10 is formed so that the total length of the axis passing through the center of the cross section in a natural length state that is not elastically deformed is shorter than the total length of the axis passing through the center of the groove width of the annular groove 4a. .

  According to this configuration, since the packing designed in advance to the predetermined dimension is prepared for the groove portion 4a of the upper core plate 4, and the restoring force from the expanded state of the packing is used to attach the groove portion 4a, The packing can be attached to the core plate with a fixing force corresponding to the force, and a packing that does not easily move with respect to the core plate in the manufacturing process can be provided. Therefore, a radiator (heat exchanger) can be obtained in which the packing for sealing between the tank and the core plate can be attached at a predetermined position with a simple configuration. Moreover, the direction of the radiator (heat exchanger) in the manufacturing process is not limited. Furthermore, if the above dimensions of the packing are appropriately set in consideration of workability for attaching the packing to the groove and the compressibility of the packing to be ensured, both the sealing performance and productivity of the packing can be improved.

  Further, when the packing 10 is pressed by the tank in the groove portion of the short width side portion 42 while being in contact with and attached to the inner wall 4d of the groove 4a by the restoring force, the packing 10 contacts the inner wall 4d. The area of the contacting portion is reduced, and the surface pressure acting on the packing 10 can be increased. Thereby, the fixing force of the packing is ensured, and the packing can be stably attached at a predetermined position.

  Further, the packing 10 includes a pair of opposing long side portions 11 extending in the longitudinal direction and a pair of opposing short width side portions 12 extending so as to intersect with the long side portion 11, and has an outer shape. It is substantially rectangular. Further, the packing 10 has a length of either the pair of long side portions 11 or the pair of short width side portions 12 with respect to the length of the pair of long side portions 41 or the pair of short width side portions 42 in the annular groove 4a. It is formed to be shorter.

  In the case of adopting this configuration, by placing either the long side portion 11 or the short width side portion 12 of the packing 10 that is shorter than the length of the groove portion 4a in the stretched state, the groove portion 4a is substantially The restoring force in the uniaxial direction in the rectangular packing 10 can be used. As a result, the seal member can be easily positioned with respect to the groove 4a, and the packing mounting workability is also improved.

  The annular groove 4a includes a bottom wall 4f, an outer wall 4e that stands perpendicular to the bottom wall 4f, and an inner wall 4d that stands parallel to the outer wall 4e and perpendicular to the bottom wall 4f. It is surrounded by. When this configuration is adopted, the substantially U-shaped wall surface forming the groove and the packing can easily come into contact with each other, and the packing can be stably installed on the groove.

  In addition, when the packing 10 having a rectangular cross-sectional shape is adopted, the area of the portion that contacts the groove 4a of the packing is increased, and the packing is more stably attached before being pressed against the core plate by the tank. It becomes easy to arrange at a predetermined position.

  Further, the protruding portion 2b of the tank has a curved surface at the tip. With this configuration, since the packing is directly pressed by a curved surface such as a substantially spherical surface, local pressure on the packing can be reduced. Thereby, while being able to suppress damage to packing, since there is no worry about damage, sufficient pressing force can be given to packing.

  Next, the manufacturing method of the radiator 1 of this embodiment is demonstrated according to FIGS. The manufacturing process of the heat exchanger (the radiator 1) includes a core plate forming process, a core assembly assembly process, a brazing process, a seal member mounting process, and a tank mounting process described below. Furthermore, the seal member mounting step includes a seal member stretching step and a seal member arranging step. FIG. 11 is a perspective view showing the configuration of the upper core plate 4. FIG. 12 is a perspective view showing the configuration of the packing 10. In addition, in order to make an understanding easy, each figure of FIGS. 14-20 is made into drawing which deleted the core part 8. FIG.

  First, a core plate forming step is performed in which each of the upper core plate 4 and the lower core plate 5 is formed into the aforementioned predetermined shape (see FIGS. 11 and 12). In the core plate forming step, the upper core plate 4 and the lower core plate 5 are formed by forming a plate material with a press machine or a rolling machine. The grooves formed in each of the upper core plate 4 and the lower core plate 5 are formed so that the longitudinal length thereof is longer than the longitudinal length of the packing 10.

  Next, the core assembly assembly process for temporarily assembling the core assembly is performed. In the core assembly assembly process, first, the plurality of tubes 8a and fins 8b are alternately stacked and assembled, and the upper end of each tube 8a is the upper core plate 4 and the lower end is the lower core plate 5. Are inserted and fixed respectively, and are temporarily assembled by being supported by the side plates 6 and 7 from the left and right direction (X direction). Next, a brazing step of brazing and joining the temporarily assembled core part assembly is performed. In this step, flux is applied in a temporarily assembled state with respect to the core part assembly, and each part is brazed and joined in a furnace. Thereby, the core part assembly is created.

  In the brazing step, the core part assembly temporarily assembled in the previous step is placed in a brazing furnace while being held by a jig. The atmosphere in the furnace is nitrogen gas, inert gas or the like. In the brazing in the furnace, by heating the atmosphere to a brazing temperature at which the brazing material can be melted, the applied brazing material is melted and the brazing material is spread between the members. Then, when the core part assembly is taken out from the furnace, the brazing material is solidified and the members are joined together by the brazing material. Further, when the core part assembly is cooled to room temperature, the core part assembly having a desired strength can be obtained.

  Next, a packing mounting process (seal member mounting process) is performed. The packing mounting step is a step of mounting the packing 10 on the groove 4a by positioning the packing 10 against at least one of the inner wall 4d and the outer wall 4e forming the groove. Here, as an example of the packing mounting process, the packing 10 is brought into contact with the inner wall 4d of the groove 4a through a packing stretching process (sealing member stretching process) and a packing arranging process (sealing member arranging process). The method of mounting is explained.

  First, a packing stretching process is performed in which the packing 10 (for example, see FIG. 12) formed in the above-described predetermined shape is stretched to a predetermined size. The packing 10 has a circumferential length of the axis shorter than the circumferential length of the axis of the groove formed with the core plate, and a longitudinal length Lp shorter than a longitudinal length of the groove (approximately L dimension). It is configured. FIG. 13 is a perspective view showing a packing stretching process. In this packing stretching process, first, four jigs are lowered with respect to the natural length packing 10 placed at a predetermined position, and the inner side surfaces of the four corner portions 13 which are the four corners of the packing 10 are lowered. Arrange the jigs so that they touch each other. The four jigs inscribed in the inner surface of each corner portion 13 are two jigs 50 provided on one end side in the longitudinal direction of the packing 10 and two jigs provided on the other end side in the longitudinal direction. And 51. The jigs 50 and 51 are extension jigs for extending the packing 10, have a substantially strip shape extending in the direction of insertion with respect to the packing 10, and have a shape in which each outer surface follows the inner surface of the corner portion 13, For example, it has a curved surface. Moreover, it is preferable that the jig | tool 50 and the jig | tool 51 are the same shape or the same member.

  Then, the two jigs 50 and the two jigs 51 are moved away from each other by a predetermined dimension (about dimension L) in the longitudinal direction (X direction), and the longitudinal side portion 11 of the packing 10 is extended. Thus, the jig 50 and the jig 51 are maintained. As a result of this stretching process, the gap between the axes of the short width side portions 12 (indicated by the alternate long and short dash lines in FIG. 13) of the packing 10 increases from the dimension Lp before the movement to the dimension L after the movement. (L-Lp) is extended (see FIG. 13).

  Next, the packing arrangement | positioning process which puts the packing 10 in the groove part 4a is performed. FIG. 14 is a perspective view showing a packing arrangement process in which the expanded packing 10 is placed in the groove 4a. 15 is a cross-sectional view of the cut surface XV-XV in FIG. 14 when viewed in the direction of the arrow. As shown in FIG. 14, in the packing arranging step, first, the packing 10 extended to the above state is lowered with respect to the upper core plate 4 placed at a predetermined position with the groove 4a visible from above, and the groove Arrange it so that it fits in 4a. As shown in FIG. 15, the packing 10 in this state receives an outwardly acting force from the jig 50 and the jig 51, which repels the force of the packing 10 itself to shrink inside. Since the groove 4a is not in contact with or slightly in contact with the bottom wall 4f, the groove 4a is not restrained by the groove 4a.

  Next, the packing 10 arranged in this way is attached to the groove 4a, and the packing mounting process (seal member mounting process) is completed. FIG. 16 is a perspective view showing a packing mounting process for releasing the expansion of the packing 10 and mounting the packing 10 in the groove 4a. 17 is a cross-sectional view of the cut surface XVII-XVII in FIG. 16 when viewed in the arrow direction.

  As shown in FIGS. 16 and 17, in the packing mounting process, the pressing pins 52 and 53 that are pressing jigs are applied from above to the packing 10 that is stretched by the jig 50 and the jig 51. Then, the packing 10 is pushed downward, and the packing 10 is securely brought into contact with the bottom wall 4f of the groove 4a. Further, the jig 50 and the jig 51 are pulled out upward in a state where the push pins 52 and 53 are pushed against the packing 10 by pressing the push-in pins 52 and 53, so that packing by the jig 50 and the jig 51 is performed. 10 is released so that the packing 10 can be contracted. As a result, while the packing 10 is in contact with the bottom wall 4f, the inner peripheral wall surface 12a abuts against the inner wall 4d and further comes into close contact with the inner wall 4d while returning to the original natural state so as to shrink toward the inner wall 4d. And is positioned at a predetermined position with respect to the core plate. In this way, the packing 10 is held by the upper core plate 4. Further, by using the pushing jig, the packing 10 can be restored at a predetermined position with respect to the groove 4a, and the packing 10 can be set at a desired position with respect to the core plate.

  Next, a tank mounting process for mounting the upper tank 2 on the upper core plate 4 to which the packing 10 is mounted is performed. FIG. 18 is a perspective view showing a state in which the upper tank 2 is to be mounted from above the upper core plate 4. FIG. 19 is a perspective view showing a state in which the upper tank 2 is installed on the upper core plate 4. FIG. 20 is a perspective view showing a state where the upper tank 2 is completely attached.

  As shown in FIGS. 18 and 19, in the tank mounting step, the upper tank 2 is lowered with the opened outer peripheral edge 2a down with respect to the upper core plate 4 to which the packing 10 is mounted. The ridge portion 2b formed on the portion 2a is brought into contact with the substantially central portion in the width direction of the packing 10 in the groove portion 4a. Further, a predetermined pressing force is applied to the upper tank 2 so that the packing 10 is deformed at a predetermined compression rate. The packing 10 is deformed with a sufficient repulsive force by pressing the ridge 2b of the upper tank, and fills the gap between the outer peripheral edge 2a and the bottom wall 4f of the groove 4a, so that the internal fluid does not leak. Sealed.

  Further, the upper tank 2 is fixed to the upper core plate 4 to complete the mounting of the tank. As shown in FIG. 20, the fixing step is performed by a plurality of claw portions provided at the end of the outer wall 4e of the upper core plate 4 while maintaining this state without releasing the pressing force applied to the upper tank 2. 4b is bent inside (fixed by caulking). The plurality of claw portions 4b are bent inward to hold down the flange portion 2c provided on the entire lower periphery of the upper tank 2 and projecting outward integrally with the outer peripheral edge portion 2a. Thereby, the upper tank 2 is fixed to the upper core plate 4 and integrated.

  Next, the lower tank 3 and the lower core plate 5 having the same configuration as the upper tank 2 are assembled. Also in this assembly, the above-described packing mounting process and tank mounting process are performed. The radiator 1 can be manufactured through the above steps.

  The effects of the method for manufacturing the radiator 1 according to this embodiment, which is an example of a heat exchanger, will be described below. The processes in this manufacturing method include a core plate forming process, a core assembly assembly process, a brazing process, a packing mounting process, and a tank mounting process. The core plate forming step is a step of forming the core plate into a predetermined shape so as to include an annular groove in which the packing 10 is disposed. The core part assembly process is a process of assembling at least the core part 8 and the core plate and temporarily assembling the core part assembly. The brazing process is a process of brazing and joining each part of the core part assembly temporarily assembled in the core part assembly process. The packing mounting step is a step of mounting the packing 10 in the groove 4a by positioning the packing 10 in contact with at least one of the inner wall 4d and the outer wall 4e of the groove. The tank mounting step is a step of sealing the joint and attaching and fixing the tank to the core plate on which the packing 10 is mounted. In the tank mounting step, a predetermined pressing force is applied to the packing 10 in a state where the ridge 2b of the tank is set to a position where the substantially central portion in the width direction of the packing 10 is pressed.

  According to this manufacturing method, the packing is positioned at a predetermined position in the groove, and the center in the width direction of the band of the packing is pushed and elastically deformed by the ridges 2b of the tank. The packing can be reliably and sufficiently compressed. Therefore, a packing method for sealing between the tank and the core plate can be attached at a predetermined position, and a manufacturing method for ensuring excellent sealing performance can be obtained.

  Further, in the core plate forming step, the annular groove 4 a is opposed to the groove of the long side portion 41 extending in a pair of opposite longitudinal directions and the groove of the long side portion 41 so as to intersect with each other. It is formed in a substantially rectangular shape including the groove portions of the pair of short width side portions 42. Further, in the packing mounting step, the packing 10 is mounted on the annular groove by contacting the inner wall 4d of the groove at either the groove of the long side portion 41 or the groove of the short width portion 42.

  According to this manufacturing method, in order to fix either one of the long side portion 11 or the short width side portion 12 of the packing 10 to the groove portion 4a, the packing 10 is positioned and attached in consideration of the restoring force of one side. , Improve productivity. In other words, the annular packing 10 tightens the inner side walls 4d located on the opposite sides due to its elasticity. For this reason, the packing 10 gives the inner wall 4d a tightening force that does not drop off from the core plate. As a result, the packing 10 is disposed in contact with at least two inner walls 4d located on the opposite side of the ring of the groove 4a. It will be attached to the core plate. Therefore, the packing 10 can be reliably attached at a predetermined position between the tank and the core plate, and a product that ensures sealing performance can be provided.

  Further, in the packing 10 used in the manufacturing process, the total length of the axis passing through the center of the cross section in a natural length state that is not elastically deformed is shorter than the total length of the axis passing through the center of the groove width of the annular groove. It is formed as follows. Further, in the sealing member mounting step, the packing 10 is mounted in the annular groove portion by a restoring force for returning from the stretched state to the natural length state.

  According to this manufacturing method, by using the packing 10 that has been designed in advance with respect to the groove portion of the core plate, the fixing necessary for fixing the packing 10 to the groove portion according to the restoring force of the packing 10 is performed. Power can be secured. In addition, by setting the dimensions of the packing 10, it is possible to provide a stable fixing force of the packing 10 to the core plate, and it is possible to perform the process of attaching the packing 10 to the groove portion in a shorter time. Moreover, the manufacturing method excellent in both the sealing performance of a tank and a core plate, and the productivity of a radiator (heat exchanger) can be provided.

  Further, in the core plate forming step, the annular groove 4 a is opposed to the groove of the long side portion 41 extending in a pair of opposite longitudinal directions and the groove of the long side portion 41 so as to intersect with each other. It is formed in a substantially rectangular shape including the groove portions of the pair of short width side portions 42. Further, in the packing mounting step, the packing 10 is mounted on the annular groove by contacting the inner wall 4d of the groove at the corner 43 where the groove of the long side portion 41 and the groove of the short width portion 42 intersect. .

  According to this manufacturing method, the annular packing 10 is brought into contact with the inner wall 4d of the corner portion 43 of the groove portion by a restoring force, so that various annular packings can be securely attached to the groove portion 4a, and the tank The packing before being pressed can be stabilized.

  In the tank mounting process, a packing stretching process for stretching the annular packing 10 to a predetermined size and a packing placing process for placing the stretched packing 10 in the annular groove are further performed. The force required for stretching is removed from the stretched packing 10, and the packing 10 is restored, so that the packing 10 is mounted in the groove.

  According to this manufacturing method, by using the degree of contraction of the packing 10 that contracts from a predetermined size, the packing 10 is mounted on the inner wall 4d of the groove portion 4a, so that the fixing force required for mounting the packing 10 can be obtained. It can be obtained with a simple process. In addition, a significant improvement in the efficiency of the tank mounting process can be expected.

(Second Embodiment)
In the second embodiment, another form of the packing 10 described in the first embodiment and another form of the core plate associated therewith will be described with reference to FIGS. 21 to 23, and the packing is the outer wall 4e of the groove portion. A configuration in which the core plate is attached to the core plate is described. FIG. 21 is a plan view showing the configuration of the packing 10B of the present embodiment. FIG. 22 is a plan view showing a state in which the packing 10B is assembled to the upper core plate 4B. FIG. 23 is a partial cross-sectional view of the cutting plane XXIII-XXIII in FIG. 22 as viewed in the direction of the arrow. The present embodiment differs from the first embodiment in the packing 10B and the upper core plate 4B (the lower core plate has the same configuration as the upper core plate 4B), but the other configurations and functions and effects are the same. This is the same as the description of one embodiment.

  As shown in FIG. 21, the packing 10B includes a locking portion 15 that protrudes outward from the outer peripheral wall surfaces 11b and 12b. The locking portion 15 has a shape along the band-shaped portion of the packing 10B, and is also a locking piece having a predetermined length. A plurality of the locking portions 15 are provided apart from the outer peripheral wall surfaces 11b and 12b of the packing 10B via the neck portion 16. Here, three locking portions 15 are provided in each of the pair of long side portions 11 of the packing 10 </ b> B and one each in the pair of short width side portions 12. The band-shaped portion, the locking portion 15 and the neck portion 16 of the packing 10B are made of the same material (for example, EPDM, silicon rubber) and are formed by integral molding using a mold.

  As shown in FIGS. 22 and 23, the upper core plate 4 has a plurality of slits 45 having a predetermined width dimension formed on its outer wall 4e. These slits 45 are provided corresponding to positions where the neck 16 is inserted when the packing 10B is installed in the groove 4a. That is, the slit 45 is a cutout portion having a size larger than the width of the neck portion 16.

  According to this embodiment, by using the packing 10B and the core plate having the above-described configuration, the packing 10B is inserted into the core plate by inserting the neck portions 16 into the slits 45 and hooking the locking portions 15 to the outer walls 4e of the groove portions. To be attached to. At this time, the packing 10B is tensioned outward, and the packing 10B is attached to the core plate in contact with the outer wall 4e of the groove. Furthermore, the protruding strip portion 2b is set to a position that presses the substantially central portion in the width direction of the packing 10B mounted in a predetermined position in this way. Thereby, the upper tank 2 can give the packing 10 the predetermined pressing force which can ensure sealing performance.

  With the above configuration, since a gap can be formed between the inner peripheral wall surfaces 11a and 12a of the packing 10B and the inner wall 4d of the groove portion, the work of attaching the packing 10B to the groove portion 4a is facilitated, and the productivity of the product is improved. Can do. Further, since the packing 10B is close to the outer wall 4e of the groove, a seal structure that is strong against the internal pressure applied to the tank can be provided.

(Other embodiments)
The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

  In the manufacturing process of the radiator 1 described with reference to FIGS. 11 to 20 in the above embodiment, the packing 10 having a length in the longitudinal direction (for example, a dimension Lp) shorter than the length in the longitudinal direction of the groove 4a is used. Then, the packing 10 is installed in the groove portion 4a in a state where the packing 10 is stretched to have a predetermined dimension (for example, dimension L) in the longitudinal direction, and packing is performed using the contraction force (restoring force) of the packing 10 by removing the stretching force. Although 10 is attached to the upper core plate 4, the following method may be used.

  For example, as shown in FIG. 6, a packing having a short width direction length (for example, dimension Dp) shorter than the short width direction length of the groove 4a is used, and this packing is made to have a predetermined dimension (for example, dimension D) in the short width direction. The packing may be attached to the upper core plate 4 by using the contraction force of the packing that is installed in the groove portion 4a in a stretched state so as to remove the stretching force. In this case, in a state where the packing is attached to the upper core plate 4, the packing is positioned without causing the inner peripheral wall surface 11a of the longitudinal side portion 11 to abut against the inner wall surface 4d of the groove portion 4a and easily move. It will be held by the upper core plate 4.

  Further, using a packing having an axial length shorter than the axial length of the groove portion 4a, the packing is installed in the groove portion 4a in a state of being stretched to have predetermined dimensions in both the short width direction and the longitudinal direction, The packing may be attached to the upper core plate 4 by using the contraction force (restoring force) of the packing by removing the stretching force.

  In the above embodiment, the packing contracts inward at the four corner portions 13 where the long side portion 11 and the short width side portion 12 intersect due to the elastic force, and the inner peripheral wall surface of the corner portion 13 is reduced. You may comprise so that it may hold | maintain closely to the inner wall 4d of the groove part 4a. In this case, the packing is pressed and fixed to the groove portion 4a by the outer peripheral edge portion 2a of the upper tank in a state where the inner peripheral wall surface of the corner portion 13 and the inner wall surface of the groove portion 4a are in contact with each other. At this time, the packing is arranged so that the corner portion 13 is positioned closer to the inner wall 4d than the outer wall 4e of the groove 4a. In other words, the packing is provided so that the axis of the corner portion 13 is inside (closer to the inner wall 4d) than the axis of the corner portion 43 of the groove 4a. When this configuration is adopted, the annular packing 10 is brought into contact with the corner portion 43 of the groove portion 4a by a restoring force, so that the outer shape is not limited to the packing 10 having a substantially rectangular shape, and various annular packings 10 are provided. Can be attached to the groove 4a in a stable state.

  In order to make the packing closely contact the inner wall 4d of the groove 4a at the corner portion 13, for example, the radius of curvature of the inner peripheral wall surface at the corner portion 13 of the packing is larger than the radius of curvature of the outer peripheral surface of the inner wall 4d of the groove portion 4a. What is necessary is just to comprise packing so that it may become. After the packing formed in this way is stretched and installed in the groove 4a, when the stretching force is removed, the packing shrinks inward due to the elastic force to restore the original state, and the inner peripheral wall surface of the corner portion 13 is the other. Prior to this portion, it comes into close contact with the corner portion of the inner wall 4d of the upper core plate 4. The packing is held on the core plate by the close contact at the corners.

It is a front view which shows the outline | summary of the radiator 1 of 1st Embodiment. It is a side view when the radiator 1 of FIG. 1 is seen in the II direction. It is a fragmentary sectional view when the radiator 1 in the cut surface III-III of FIG. 1 is seen in the arrow direction. It is a fragmentary sectional view when the radiator 1 in the cut surface IV-IV of FIG. 2 is seen in the arrow direction. FIG. 3 is a plan view showing a state where the packing 10 is assembled to the upper core plate 4. It is a top view of packing 10 which made length Dp of short side part 12 shorter than length D of short side part 42 of a slot. It is a top view of packing 10A which made length Lp of the longitudinal side part 11 shorter than the length L of the longitudinal side part 41 of a groove part. (A) And (b) is a fragmentary sectional view when the cut surface VIII-VIII of FIG. 5 is seen in the arrow direction, (a) is attached with the packing 10 in contact with the inner wall 4d of the groove. (B) shows the case where the packing 10 is mounted in contact with the outer wall 4e of the groove. (A) And (b) is a fragmentary sectional view when the cut surface IX-IX of FIG. 5 is seen in the direction of the arrow, and (a) is attached with the packing 10 in contact with the inner wall 4d of the groove. (B) shows the case where the packing 10 is mounted in contact with the outer wall 4e of the groove. It is the fragmentary sectional view which showed the case where packing 10 is mounted | worn without contacting either the inner wall 4d and the outer wall 4e of a groove part. 4 is a perspective view showing a configuration of an upper core plate 4. FIG. 2 is a perspective view showing a configuration of a packing 10. FIG. It is a perspective view which shows a packing extending process. It is a perspective view which shows the packing arrangement | positioning process which puts the packing 10 of the expanded state in the groove part 4a. It is sectional drawing when the cut surface XV-XV of FIG. 14 is seen in the arrow direction. It is a perspective view which shows the packing mounting process which cancels | stretches expansion of the packing 10 and mounts the packing 10 in the groove part 4a. It is sectional drawing when the cut surface XVII-XVII of FIG. 16 is seen in the arrow direction. 4 is a perspective view showing a state where the upper tank 2 is to be mounted from above the upper core plate 4. FIG. FIG. 4 is a perspective view showing a state where the upper tank 2 is installed on the upper core plate 4. FIG. 5 is a perspective view showing a state where the upper tank 2 is completely attached. It is a top view which shows the structure of packing 10B of 2nd Embodiment. It is a top view which shows the state which attached packing 10B to the upper core plate 4B. It is a fragmentary sectional view when the cut surface XXIII-XXIII of FIG. 22 is seen in the arrow direction.

Explanation of symbols

2… Upper tank (tank)
2a ... Outer peripheral edge of tank (end of tank)
2b ... ridge 3 ... lower tank (tank)
4 ... Upper core plate (core plate)
4a ... groove 4d ... inner wall 4e ... outer wall 5 ... lower core plate (core plate)
8 ... Core part 8a ... Tube 10, 10B ... Packing (seal member)
DESCRIPTION OF SYMBOLS 11 ... Long side part 11b, 12b ... Outer peripheral wall surface 12 ... Short width side part 15 ... Locking part 41 ... Long side part 42 ... Short width side part

Claims (10)

The core portion (8) having a plurality of tubes (8a) through which a heat exchange medium flows, the core plate (4, 5) to which the plurality of tubes are connected, and the core so as to communicate with the inside of the plurality of tubes. A tank (2, 3) mounted on the plate and a joint between the tank and the core plate, and is elastically deformed by a pressing force received from an end (2a) of the tank to seal the joint. A sealing member (10),
The core plate is formed with an annular groove (4a) in which the seal member is disposed,
The end of the tank is provided with a ridge (2b) protruding toward the seal member,
The seal member has an annular shape in which a belt-like portion having a width (A) narrower than the groove width dimension (B) of the groove part (4a) is continuous.
Abutting at least one of the inner wall (4d) and the outer wall (4e) forming the groove, and being mounted on the core plate;
The heat exchanger according to claim 1, wherein the ridge portion of the tank presses a substantially central portion in the width direction of the belt-shaped portion of the sealing member that is in contact with the tank. The annular groove is formed by a pair of opposed long sides extending in the longitudinal direction (41) and a pair of opposed short sides extending so as to intersect with the groove of the long side portion (41). A substantially rectangular shape including a groove portion of the portion (42),
The seal member contacts either the inner wall (4d) or the outer wall (4e) of the groove in either the groove of the long side portion (41) or the groove of the short width side portion (42). The heat exchanger according to claim 1, wherein the heat exchanger is attached to the core plate in a contact state.   The seal member is formed in a size in which the total length of the axis passing through the center of the cross section in a natural length state that is not elastically deformed is shorter than the total length of the axis passing through the center of the groove width of the annular groove, 2. The heat exchanger according to claim 1, wherein the heat exchanger is attached to the core plate in a state of being in contact with the inner wall (4 d) of the groove by a restoring force for returning to the natural length. The sealing member (10B) includes a locking portion (15) protruding outward from the outer peripheral wall surface (11b, 12b),
2. The core plate according to claim 1, wherein the seal member is attached to the core plate in a state of being in contact with the outer wall of the groove portion by the latching portion being hooked on the outer wall of the groove portion. Heat exchanger.   The heat exchanger according to any one of claims 1 to 4, wherein the seal member has a rectangular cross-sectional shape.   The heat exchanger according to any one of claims 1 to 5, wherein a tip of the protruding portion of the tank is formed with a curved surface. The core portion (8) having a plurality of tubes (8a) through which a heat exchange medium flows, the core plate (4, 5) to which the plurality of tubes are connected, and the core so as to communicate with the inside of the plurality of tubes. A tank (2, 3) attached to the plate, and a belt-shaped portion formed in an annular shape, and a seal member provided at a joint between the tank (2, 3) and the core plate, An annular seal member (10) that is elastically deformed by a pressing force received from an end (2a) of a tank and seals the joint, and a method of manufacturing a heat exchanger,
A core plate forming step of forming the core plate into a predetermined shape so as to include an annular groove (4a) in which the seal member is disposed;
A core part assembly process for assembling at least the core part and the core plate;
A seal member mounting step of positioning the seal member in contact with at least one of the inner wall (4d) and the outer wall (4e) forming the groove, and mounting the groove on the groove;
The protruding portion (2b) protruding from the end of the tank toward the seal member is pressed against the mounted seal member to elastically deform the seal member and seal the joint, and the core plate A tank mounting process for fixing the tank to
In the tank mounting step, the tank is mounted on the core plate so that the ridge portion presses substantially the center in the width direction of the strip-shaped portion of the positioned seal member. Production method. In the core plate forming step, the annular groove portion is extended so as to intersect with the groove portion of the longitudinal side portion (41) extending in a pair of opposing longitudinal directions and the groove portion of the longitudinal side portion (41). Formed in a substantially rectangular shape including a groove portion of a pair of opposed short width side portions (42),
In the sealing member mounting step, the sealing member is brought into contact with the inner wall (4d) of the groove portion at either the groove portion of the long side portion (41) or the groove portion of the short width side portion (42). The heat exchanger manufacturing method according to claim 7, wherein the heat exchanger is mounted in the annular groove. The sealing member mounting step includes
A seal member extending step of extending the annular seal member to a predetermined size; and a seal member disposing step of disposing the annular seal member in the annular groove in a state where the annular seal member is extended to a predetermined size. The sealing member is mounted in contact with the inner wall of the groove portion by removing the force required for the stretching of the sealing member in the stretched state and trying to restore the sealing member. The manufacturing method of the heat exchanger of Claim 7 or 8. The seal member is formed in a size in which the total length of the axis passing through the center of the cross section in a natural length state that is not elastically deformed is shorter than the total length of the axis passing through the center of the groove width of the annular groove,
10. The seal member mounting step, wherein the seal member is mounted in the annular groove by a restoring force for returning the stretched state to the natural length state. The manufacturing method of the heat exchanger as described in 1 item | term.

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