JP2009047401A - Header tank structure for heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a header tank structure for a heat exchanger capable of securely performing the temporary fixing of a tank to a plate regardless of a mounting position of a connector. <P>SOLUTION: Caulking projections 34 are projected at open side ends 31c of the tank 31, and insertion holes 35 to which the caulking projections 34 are inserted are formed at the plate 32. While the caulking projections 34 are inserted to the insertion holes 35, external fitting parts 32b of the plate 32 are externally fitted to the outside of the open side ends 31c of the tank 31 so as to assemble the tank 31 to the plate 32. With the caulking projections 34 inserted to the insertion holes 35, tips of the caulking projections 34 are caulked to temporarily fix the tank 31 to the plate 32. Thus, the caulking projections 34 can be prevented from projecting to the outside of the tank 31. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a structure of a header tank for a heat exchanger provided at both ends of a core portion of a heat exchanger.

  The heat exchanger is schematically configured by providing a pair of header tanks communicating with both ends of the tube at both ends of the core portion to which the heat dissipating fins are attached while a plurality of refrigerant circulation tubes are arranged in parallel. Then, when the refrigerant in one header tank is passed through the core portion and flows to the other header tank, the other fluid that passes through the radiating fin in the core portion, for example, between air and the refrigerant. To exchange heat.

  The heat exchanger is used, for example, in a refrigeration cycle of an automobile air conditioner, but in recent years, there is a tendency to use carbon dioxide as a refrigerant in the refrigeration cycle, and a structure capable of withstanding high pressure and high temperature is required for the heat exchanger. Is done. For this reason, conventionally, the header tank is formed by combining a tank portion obtained by press-molding a thick plate and a plate portion.

  The tank part is formed in a U-shaped or W-shaped cross-sectional shape, and a concave portion for refrigerant circulation is formed inside, and the plate part is formed in a U-shaped cross-section to open the tank part. The outer end is fitted on the side end portion and sealed by brazing the fitting portion (see, for example, Patent Document 1).

In addition, a refrigerant introduction connector and a refrigerant discharge connector are coupled to the outside of the tank portion, and a flat portion provided at the center portion of the plate portion includes a plurality of tubes with a predetermined interval in the longitudinal direction of the header tank. A mounting hole is formed.
Japanese Patent Laying-Open No. 2006-64201 (page 7-8, FIG. 1)

  However, in the above-described conventional header tank structure for a heat exchanger, the tank part and the plate part are finally joined by brazing, but it is necessary to temporarily fix the header part and the plate part when brazing. There is.

  Conventionally, a caulking claw is projected from the tip of the external fitting portion of the plate portion that is fitted to the open side end portion of the tank portion, and the caulking claw is overlaid on the outside of the tank portion and then caulked. It is temporarily fixed by.

  However, a connector for refrigerant introduction and refrigerant discharge is connected to the outside of the tank portion, and the mounting position of the connector varies depending on the vehicle type. For this reason, when the said crimping nail | claw is previously formed in the longitudinal direction of the header tank with the predetermined space | interval, the attachment position of the said connector and the formation position of a part of crimping claw may correspond. .

  When the positions of the connector and the caulking claw are matched in this way, the caulking claw at that portion is removed, and the caulking force cannot be applied to the tank portion and the plate portion at the excised portion. . For this reason, the temporary fixing of the tank part and the plate part becomes incomplete at the part where the caulking claw is cut out, and as a result, brazing at that part becomes unstable.

  Accordingly, the present invention provides a header tank structure for a heat exchanger that can reliably perform temporary fixing between a tank portion and a plate portion regardless of the mounting position of a connector.

  According to the first aspect of the present invention, there are provided a tank portion having a coolant circulation recess formed therein, and is fitted to the open end portion of the tank portion so as to seal the circulation recess, and has a plurality of intervals at predetermined intervals in the longitudinal direction. In a header tank structure for a heat exchanger having a plate portion having a tube mounting hole, a caulking projection protrudes from an open end of the tank portion, and the caulking projection is inserted into the plate portion. An insertion hole is formed, the tip of the crimping protrusion inserted into the insertion hole is crimped, and the tank part and the plate part are temporarily fixed.

  According to a second aspect of the present invention, in the header tank structure for a heat exchanger according to the first aspect, the caulking protrusion is inserted into the insertion hole provided in the flat portion of the plate portion and protruded to the opposite side to be caulked. Features.

  According to a third aspect of the present invention, in the header tank structure for a heat exchanger according to the first or second aspect, the insertion hole is formed by removing the vicinity of the tube mounting hole.

  According to a fourth aspect of the present invention, there is provided a heat exchange comprising: a tank portion in which a coolant circulation recess is formed on an inner side; and a plate portion that is externally fitted to the open end of the tank portion to seal the circulation recess. The dexterous header tank structure is characterized in that the outer end of the outer fitting portion of the plate portion is crimped to the tank portion side to temporarily fix the tank portion and the plate portion.

  A fifth aspect of the present invention is the header tank structure for a heat exchanger according to the fourth aspect, wherein a gap is formed between the front end portion of the outer fitting portion and the outer side of the open side end portion of the tank portion in the state before the caulking. It is characterized by having.

  A sixth aspect of the present invention is the header tank structure for a heat exchanger according to the fourth or fifth aspect, wherein the caulking is processed with a jig in which at least a corner portion of the caulking portion is chamfered or arcuate. .

  The invention according to claim 7 is the heat exchanger header tank structure according to any one of claims 4 to 6, wherein the header tank has a closing plate that engages with a slit formed in the tank portion and blocks the flow recess. And the caulking position of the outer fitting portion of the plate portion is set to an exposed portion where at least the closing plate is exposed from the slit.

  According to the invention of claim 1, a caulking protrusion is projected from the open side end portion of the tank portion located inside the plate portion, and an insertion hole is formed in the plate portion located outside the tank portion, The caulking protrusion is inserted into the insertion hole inside the plate portion. Therefore, it is possible to prevent the caulking protrusion from projecting to the outside of the tank portion when the tip end portion of the caulking protrusion inserted into the insertion hole is temporarily fixed by caulking.

  For this reason, when attaching a connector to the outer side of a tank part, since the said crimping protrusion and its crimping part do not become obstructive, the freedom degree of the attachment position of a connector can be raised.

  Further, the caulking protrusion and the insertion hole can be set at a location necessary for temporarily fixing the tank portion and the plate portion regardless of the mounting position of the connector. Therefore, since the tank part and the plate part can be crimped at the necessary places, the tank part and the plate part can be firmly fixed temporarily, and eventually the brazing to be finally performed can be surely performed.

  According to the second aspect of the invention, in addition to the effect of the first aspect, the caulking protrusion is inserted into the insertion hole provided in the flat portion of the plate portion and protruded to the opposite side. The fastening force of the fastening part can be increased.

  According to the invention of claim 3, in addition to the effects of claims 1 and 2, the insertion hole formed in the plate portion is formed by removing the vicinity of the tube attachment hole. It is possible to ensure the rigidity of the peripheral edge of the.

  According to the fourth aspect of the present invention, the outer fitting portion can be crimped and fixed to the open side end portion of the tank portion by crimping the outer end portion of the outer fitting portion of the plate portion located outside the tank portion. The caulking portion can be prevented from protruding outside the tank portion.

  For this reason, when attaching a connector to the outer side of a tank part, since the said caulking part does not become obstructive, the freedom degree of the attachment position of a connector can be raised.

  In addition, since the caulking part can be set at a place necessary for temporarily fixing the tank part and the plate part regardless of the mounting position of the connector, the tank part and the plate part can be firmly fixed temporarily. Finally, brazing can be performed reliably.

  Furthermore, since the outer fitting portion of the plate portion is directly crimped, it is not necessary to project the crimping claw, so that the material yield can be improved.

  According to the invention of claim 5, in addition to the effect of claim 4, a gap is formed between the front end portion of the outer fitting portion and the outer side of the open side end portion of the tank portion in the state before the caulking. Thus, the excess portion of the caulking portion enters the gap δ so that the tank portion and the plate portion can be easily and reliably connected.

  According to the invention of claim 6, in addition to the effects of claims 4 and 5, the caulking is processed by a jig having at least the corners of the caulking part as chamfered or arcuate surfaces. At this time, the jig can be prevented from biting into the outer fitting portion of the plate portion.

  According to the invention of claim 7, in addition to the effects of claims 4 to 6, when the closing plate that blocks the circulation recess is engaged with the slit formed in the tank portion and exposed from the slit, Since the caulking position of the outer fitting portion is set to the exposed portion of the closing plate, the closing plate can be temporarily fixed at the caulking portion, and spot welding for temporarily fixing the closing plate can be omitted. .

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

(First embodiment)
FIGS. 1-10 shows 1st Embodiment of the header tank structure for heat exchangers concerning this invention, and it demonstrates taking an example, when using as a condenser of the refrigerating cycle which uses a carbon dioxide for a refrigerant | coolant as a heat exchanger. Shall.

  FIG. 1 is a perspective view of a main part of the heat exchanger.

  As shown in FIG. 1, a heat exchanger 1 to which the present invention is applied includes a core portion 2, a heat exchanger header tank (hereinafter referred to as a header tank) 3, and a connector 4. The 1 shows a state in which only one side (upper part) of the core part 2 is shown, the header tank 3 is arranged only on one side of the core part 2. Of course, the other side (not shown) of the core part 2 (not shown) is shown. There is also a header tank in the lower part.

  The core portion 2 is formed by including a plurality of flat tubes 21 arranged in parallel and fins 22 attached between the tubes 21, and the refrigerant flowing through the tubes 21 and the air passing through the fins 22 are formed. Exchange heat between them.

  The header tank 3 is disposed on both sides of the core portion 2 and communicates with the tubes 21. Basically, the refrigerant in one header tank 3 is supplied to the other header tank via the tube 21. To do.

  The connector 4 is provided to the header tank 3 for introducing and discharging refrigerant. Basically, the refrigerant circulating in the refrigeration cycle is introduced into one header tank 3 from the connector 4 for introduction, and the refrigerant is discharged from the other header tank via the connector for discharge, that is, the refrigeration cycle. It is designed to return to the circulation path.

  In addition, the refrigerant | coolant flow path in the said heat exchanger 1 can take not only the said basic structure but various other flow path configurations.

  For example, the central portion in the longitudinal direction of one header tank 3 is partitioned by a closing plate, and the introduction and discharge connectors 4 are provided at both ends of the header tank 3. Then, the refrigerant introduced from the introduction connector 4 is fed from one half of one header tank 3 to the other header tank via the half of the core portion 2. And it can also be set as the structure which returns the refrigerant | coolant supplied to the other header tank to the other half of one header tank 3 via the remaining half core part 2, and discharges it from the connector for discharge | emission.

  In addition to this, various refrigerant flow paths can be configured by appropriately partitioning the inside of one header tank 3 or the other header tank with a closing plate.

  2 is a perspective view of the main part of the header tank, and FIG. 3 is a cross-sectional view taken along the line AA in FIG.

  As shown in FIGS. 2 and 3, the header tank 3 is formed by combining a tank portion 31 and a plate portion 32, each of which is formed by press-molding a thick plate material so as to withstand high temperature and pressure.

  The tank portion 31 is formed with an arcuate bulging portion 31a having an arcuate cross section in the width direction so as to have a substantially M-shaped cross section. The side to be coupled to is an open end 31c. At this time, as shown in FIG. 3, the distribution recess 31b is divided in the width direction by a central protrusion 31d formed in an M-shaped cross section. That is, the circulation recess 31b is provided in a state of being separated from the inside of the arcuate bulging portion 31a provided side by side.

  The plate portion 32 is formed in a substantially U-shaped cross section by a flat portion 32a and an external fitting portion 32b, and is externally fitted in close contact with the open side end portion 31c of the tank portion 31, and finally brazed. As a result, the inside of the circulation recess 31b is sealed.

  4 is an exploded perspective view of the header tank as viewed from the bottom, and FIG. 5 is a cross-sectional view taken along the line BB in FIG.

  Further, as shown in FIG. 4, the flat portion 32a of the plate portion 32 is formed with a plurality of tube mounting holes 33 at a predetermined interval in the longitudinal direction. As shown, the end 21a of the tube 21 is inserted and coupled. At this time, the tube mounting hole 33 is a flat oblong hole along the cross-sectional shape of the tube 21, and the length direction thereof is formed over substantially the entire width of the flat portion 32a.

  As shown in FIG. 5, the tank portion 31 has a central projecting portion 31 d bulging outward (upward in the figure) at a portion facing the tube mounting hole 33, that is, at a mounting portion of the tube 21. Thus, a communication passage 31e is formed which communicates the circulation recesses 31b on both sides.

  Here, in the present invention, as shown in FIG. 4, a caulking protrusion 34 is provided on the open side end portion 31 c of the tank portion 31, and the caulking portion 32 a of the plate portion 32 is swaged. An insertion hole 35 for inserting the protrusion 34 is formed.

  In addition, the code | symbol 38 in FIG. 4 is the reinforcement hole which inserts and fixes the edge part of the reinforcement which is not shown in figure for reinforcing the connection fixation state of the header tanks 3 mutually.

  6 is a perspective view of the assembled state of the tank portion and the plate portion as seen from the bottom surface, and FIG. 7 is a cross-sectional view taken along the line CC in FIG.

  As shown in FIGS. 6 and 7, the outer fitting portion 32 b of the plate portion 32 is fitted on the outer side of the open side end portion 31 c of the tank portion 31 while the caulking protrusion 34 is inserted into the insertion hole 35. Then, the tank part 31 and the plate part 32 are assembled.

  8 is a perspective view of the temporarily fixed state of the tank portion and the plate portion as viewed from the bottom surface, and FIG. 9 is a cross-sectional view taken along the line DD in FIG.

  Next, as shown in FIGS. 8 and 9, with the caulking projection 34 inserted into the insertion hole 35, the tip end portion of the caulking projection 34 is punched and caulked (caulking portion 36). Thereby, the tank part 31 and the plate part 32 are temporarily fixed.

  The header tank 3 is completed by temporarily brazing the joint portions after the tank portion 31 and the plate portion 32 are temporarily fixed by the caulking portion 36.

  In addition, the header tank 3 is completed by shielding the edge part of the recessed part 31b for distribution | circulation by attaching the shielding member to the longitudinal direction both ends of the header tank 3 although not shown in figure.

  FIG. 10 is a plan view of the plate portion.

  By the way, the insertion hole 35 formed in the plate part 32 is formed by removing the vicinity of the tube mounting hole 35 as shown in FIG.

  That is, in this embodiment, as shown in the figure, the insertion holes 35 are formed at both side ends of the flat portion 32a and in the central portion between the adjacent tube mounting holes 35. And it is preferable to form the said insertion hole 35 avoiding the extension (area | region N1 shown by hatching) on the extension (area | region N1 shown by hatching) of the tube attachment hole 35, or the adjacent tube attachment hole 35 (area | region shown by hatching).

  With the above configuration, according to the header tank 3 of the present embodiment, the caulking protrusion 34 protrudes from the open-side end 31 c of the tank portion 31 located inside the plate portion 32, while on the outside of the tank portion 31. An insertion hole 35 is formed in the positioned plate portion 32. Therefore, it is possible to prevent the caulking protrusion 34 from protruding outside the tank portion 31 when the tip end portion of the caulking protrusion 34 inserted into the insertion hole 35 is caulked and temporarily fixed.

  For this reason, as shown in FIG. 9, when the connector 4 is attached to the outside of the tank portion 31, the caulking protrusion 34 and its caulking portion 36 do not get in the way. The degree of freedom can be increased.

  Further, the caulking protrusion 34 and the insertion hole 35 can be set at a location necessary for temporarily fixing the tank portion 31 and the plate portion 32 regardless of the attachment position of the connector 4. For this reason, since the tank part 31 and the plate part 32 can be crimped in a required part, the tank part 31 and the plate part 32 can be firmly fixed temporarily, and eventually the brazing to be performed finally is performed reliably. be able to.

  Moreover, in this embodiment, since the crimping protrusion 34 is inserted into the insertion hole 35 provided in the flat part 32a of the plate part 32 and protruded to the opposite side, the fastening force of the crimping part is increased. Can do.

  Furthermore, in the present embodiment, the insertion hole 35 formed in the plate portion 32 is formed by removing the vicinity of the tube attachment hole 33, so that the rigidity of the peripheral portions of the insertion hole 35 and the tube attachment hole 33 can be ensured.

(Second Embodiment)
FIGS. 11 to 15 show a second embodiment of the present invention, in which the same components as those in the first embodiment are denoted by the same reference numerals and redundant description is omitted.

  11 is a perspective view of the main part of the header tank, and FIG. 12 is an enlarged cross-sectional view taken along the line EE in FIG.

  As shown in FIGS. 11 and 12, the header tank structure for the heat exchanger of this embodiment basically has the same configuration as that of the first embodiment, and a tank portion 31 and a plate portion 32 obtained by press-molding thick plate materials, respectively. And the header tank 3 is configured. And the external fitting part 32b of the plate 32 is externally fitted to the open side end part 31c of the tank part 31, and the circulation concave part 31b of the tank part 31 is sealed.

  Here, this embodiment is mainly different from the first embodiment in that the outer end of the outer fitting portion 32b of the plate portion 32 is crimped to the tank portion 31 side (caulking portion 37), and the tank portion 31 and the plate portion 32 are temporarily fixed.

  That is, by crimping the outer end of the outer fitting portion 32b, the thickness of the outer end of the outer fitting portion 32b is strongly pressed against the outer side of the open end 31c of the tank portion 31 in the crimped portion 37. The tank part 31 and the plate part 32 can be fixed.

  FIG. 13 is an enlarged cross-sectional view of a portion F in FIG.

  Further, in the present embodiment, as shown in FIG. 13, a gap δ is provided between the front end portion of the outer fitting portion 32b and the outer side of the open end portion 31c of the tank portion 31 in a state before caulking. It is.

  The gap δ is formed between the inner flat surface of the outer fitting portion 32b and the outer arc surface of the arcuate bulged portion 31a of the tank portion 31, and the gap δ is an acute triangular space portion.

  FIG. 14 is a sectional view of the caulking device, and FIG. 15 is a perspective view showing the tip shape of the punch of the caulking device.

  The tank part 31 and the plate part 32 are caulked using a caulking device 100 shown in FIG. In the caulking device 100, the tank part 31 and the plate part 32 are fitted and set to the lower mold 101, and in this state, the upper side of the tank part 31 is pressed and fixed by the pad 102.

  Then, the punch 104 as a jig is lowered while being guided by the backup 103 to form the caulking portion 37. In FIG. 14, the left half shows the state immediately before machining, and the right half shows the completed state.

  As shown in FIG. 15, the punch 104 is formed in a substantially rectangular parallelepiped shape as a whole, but the caulking portion 37 is processed inside the lower end portion facing the front end portion of the outer fitting portion 32 b of the plate portion 32. An inclined surface 104a is formed.

  At this time, chamfered portions 104K are formed at both side corners of the inclined surface 104a, the inner side surface 104b, and the lower surface 104c of the punch 104, and the punch 104 bites the workpiece, that is, the outer fitting portion 32b. Is suppressed. Note that instead of the chamfered portion 104K, a circular arc surface may be used.

  FIG. 16 is a cross-sectional view showing a modification of the caulking device.

  FIG. 16 shows another caulking device 100A for processing the caulking portion 37. The caulking device 100A uses a punch 110 that entirely covers the tank portion 31 and the plate portion 32 that are fitted to each other. It was. The punch 110 is formed with an arcuate recess 110a straddling the outer fitting portions 32b on both sides of the plate portion 32, and the caulking portion 37 is processed inside both ends of the recess 110a.

  In addition, the caulking apparatus 100A of this modification example attaches | subjects the same code | symbol to the same component as the caulking apparatus 100, and the overlapping description is abbreviate | omitted.

  Therefore, according to the header tank structure for a heat exchanger of the present embodiment, the outer fitting portion 32b is swaged to the tank portion 31 by crimping the outer end portion of the outer fitting portion 32b of the plate portion 32 located outside the tank portion 31. Can be fixed by caulking to the open end 31c. For this reason, since it can prevent that the crimping part 37 protrudes on the outer side of the tank part 31, when attaching the connector 4 on the outer side of the tank part 31, the said crimping part 37 does not become obstructive, and the connector 4 The degree of freedom of the mounting position can be increased.

  Further, since the caulking portion 37 can be set at a place necessary for temporarily fixing the tank portion 31 and the plate portion 32 regardless of the mounting position of the connector 4, the tank portion 31 and the plate portion 32 are firmly fixed. Temporary fixing can be performed, and eventually brazing can be performed reliably.

  Furthermore, since the outer fitting portion 32b of the plate portion 32 is directly swaged, it is not necessary to project the swaged claws as in the conventional case, so that the material yield can be improved.

  Furthermore, in this embodiment, since the gap δ is provided between the front end portion of the outer fitting portion 32b and the outside of the open side end portion 31c of the tank portion 31 in a state before caulking, the caulking portion In 37, the surplus portion of the outer fitting portion 32 b enters the gap δ and bites the surface of the tank portion 31.

  Therefore, even when the outer fitting portion 32b of the plate portion 32 is closely fitted to the open side end portion 31c of the tank portion 31, the coupling by the crimping portion 37 can be easily and reliably performed.

  Further, since the caulking portion 37 is processed by the punch 104 having the chamfered corners chamfered 104K, the punch 104 is prevented from biting into the external fitting portion of the plate portion when the caulking is performed. Can do.

(Third embodiment)
17 to 20 show a third embodiment of the present invention, in which the same components as those in the second embodiment are denoted by the same reference numerals and redundant description is omitted.

  FIG. 17 is a perspective view of the main part of the header tank.

  As shown in FIG. 17, the header tank structure for the heat exchanger according to the present embodiment basically has the same configuration as that of the second embodiment, and combines a tank portion 31 and a plate portion 32, each of which is formed by press-molding a thick plate material. Thus, the header tank 3 is configured. Then, the outer fitting portion 32b of the plate 32 is fitted on the open side end portion 31c of the tank portion 31, and the outer end of the outer fitting portion 32b of the plate portion 32 is crimped to the tank portion 31 side. And the plate portion 32 are temporarily fixed.

  Here, this embodiment is mainly different from the second embodiment in that the present invention is applied to the header tank 3 in which the closing plate 200 blocks the inside of the header tank 3, that is, the circulation recess 31 b of the tank portion 31. In the point.

  18 is a cross-sectional view of the header tank taken along the slit portion for inserting the closing plate, FIG. 19 is a front view of the closing plate, and FIG. 20 is a cross-sectional view showing a place where the closing plate is temporarily fixed at the caulking portion.

  That is, as shown in FIGS. 18 and 19, the header tank 3 according to the present embodiment includes two closing plates 200 that engage with the slits 201 formed in the tank portion 31 and block the circulation recess 31 b. I have.

  That is, the header tank 3 is formed by merely fitting the plate portion 32 to the tank portion 31 so that the inside of the tank portion 31, that is, the inside of the arcuate bulging portion 31 a communicates in the longitudinal direction. It is in an open state. For this reason, it is necessary to close both longitudinal ends of the header tank 3, and the two closing plates 200 are used for closing. Also, when the intermediate portion of the header tank 3 is shut off, the two closing plates 200 are used.

  And in this embodiment, as shown in FIG. 17, the crimping position of the external fitting part 32b of the said plate part 32 is set to the exposed part 200E which the said closing plate 200 exposed from the said slit 201 at least.

  Therefore, according to the header tank structure for a heat exchanger of the present embodiment, the crimping position provided in the outer fitting part 32b of the plate part 32, that is, the formation position of the crimping part 37 is set to the closed part 200E. . For this reason, as shown in FIG. 20, since the two closing plates 200 can be temporarily fixed by the crimping portion 37, spot welding for temporarily fixing the closing plates 200 can be omitted.

  As a modification of the third embodiment, it is conceivable to temporarily fix the side surfaces on both sides of each closing plate 200 with the caulking portions 37, respectively. If comprised in this way, each closing plate 200 can be temporarily fixed reliably.

(Fourth embodiment)
FIGS. 21 to 24 show a fourth embodiment of the present invention, FIG. 21 is a perspective view of the main part of the header tank, FIG. 22 is a cross-sectional view of the header tank taken along the slit portion for inserting the closing plate, and FIG. FIG. 24 is a cross-sectional view of a place where the closing plate is temporarily fixed at the caulking portion.

  In comparing the fourth embodiment and the third embodiment, in the third embodiment, two slits 201 formed at the same position in the longitudinal direction of the tank portion 31 are replaced with two closing plates 200. However, the fourth embodiment is different only in that it is closed using a single closing plate 200A.

  The single closing plate 200A is integrally formed with two closing plate portions 200a arranged at intervals, and a connecting portion 200b for connecting both the closing plate portions 200a.

  Since other configurations are the same as those of the third embodiment, the same components in the drawings are denoted by the same reference numerals, and redundant description is omitted.

  Also in the header tank structure for the heat exchanger of the fourth embodiment, similarly to the third embodiment, the caulking position of the outer fitting portion 32b of the plate portion 32 is at least an exposed portion where the closing plate 200A is exposed from the slit 201. 200E is set. For this reason, as shown in FIG. 24, since the single closing plate 200A can be temporarily fixed by the caulking portion 37, spot welding for temporarily fixing the closing plate 200A can be omitted.

  In addition, there are the following advantages compared to the third embodiment. In the third embodiment, since each of the two closing plates 200 is temporarily fixed only at one side surface by the crimping portion 37, the temporary fixing of each closing plate 200 is unstable. In order to prevent this, as in the modification of the third embodiment, it is necessary to temporarily fix the side surfaces on both sides of each closing plate 200 with the caulking portions 37. The score increases. On the other hand, in the fourth embodiment, the side surfaces on both sides of the single closing plate 200A are temporarily fixed by the caulking portions 37, so that the single closing plate 200A can be securely attached without increasing the number of caulking points. Can be temporarily fixed.

  By the way, although the header tank structure for heat exchangers of this invention was demonstrated taking the example in the said 1st-4th embodiment, other embodiment is in the range which does not deviate from the summary of this invention, without being restricted to these embodiments. Various types can be adopted.

  For example, the present invention is applicable not only to high-temperature and high-pressure refrigerants such as carbon dioxide, but also to ordinary heat exchangers.

  In addition, the tank portion is not limited to the M-shaped cross section, and may have other cross sectional shapes.

The principal part perspective view of the heat exchanger in 1st Embodiment of this invention. The principal part perspective view of the header tank in 1st Embodiment of this invention. Sectional drawing along the AA line in FIG. The disassembled perspective view which looked at the header tank in 1st Embodiment of this invention from the bottom face direction. Sectional drawing along the BB line in FIG. The perspective view which looked at the assembly state of the tank part and plate part in 1st Embodiment of this invention from the bottom face direction. Sectional drawing along CC line in FIG. The perspective view which looked at the temporarily fixed state of the tank part and plate part in 1st Embodiment of this invention from the bottom face direction. Sectional drawing along the DD line in FIG. The top view of the plate part in 1st Embodiment of this invention. The principal part perspective view of the header tank in 2nd Embodiment of this invention. The expanded sectional view along the EE line in FIG. The expanded sectional view of the F section in FIG. Sectional drawing of the crimping apparatus in 2nd Embodiment of this invention. The perspective view which shows the front-end | tip part shape of the punch of the crimping apparatus in 2nd Embodiment of this invention. Sectional drawing which shows the modification of the crimping apparatus in 2nd Embodiment of this invention. The principal part perspective view of the header tank in 3rd Embodiment of this invention. Sectional drawing of the header tank cut in the slit part which inserts the closing plate in 3rd Embodiment of this invention. The front view of the closing board in 3rd Embodiment of this invention. Sectional drawing of the location where the two closing plates in 3rd Embodiment of this invention were temporarily fixed by the crimping part. The principal part perspective view of the header tank in 4th Embodiment of this invention. Sectional drawing of the header tank cut in the slit part which inserts the closing plate in 4th Embodiment of this invention. The front view of the closing board in 4th Embodiment of this invention. Sectional drawing of the location where the closing plate in 4th Embodiment of this invention was temporarily fixed by the crimping part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat exchanger 3 Header tank 4 Connector 31 Tank part 31b Circulation recessed part 31c Open side end part 32 Plate part 32a Flat part 32b Outer fitting part 33 Tube attachment hole 34 Clamping protrusion 35 Insertion hole 36, 37 Clamping part 104 Punch (jig)
104K Chamfered portion 200, 200A Closing plate 200E Exposed portion 201 Slit

Claims (7)

A tank part (31) in which a concave part for refrigerant circulation (31b) is formed inside;
A plate portion (with a plurality of tube attachment holes (33) formed at predetermined intervals in the longitudinal direction by sealingly fitting the circulation recess portion (31b) by fitting to the open end portion (31c) of the tank portion (31). 32), and a header tank structure for a heat exchanger,
A caulking protrusion (34) projects from the open end (31c) of the tank part (31), and an insertion hole (35) for inserting the caulking protrusion (34) into the plate part (32). The heat exchange is characterized in that the tank portion (31) and the plate portion (32) are temporarily fixed by crimping the tip end portion of the crimping protrusion (34) formed and inserted into the insertion hole (35). Dexter header tank structure.   The caulking protrusion (34) is inserted into the insertion hole (35) provided in the flat part (32a) of the plate part (32) and protruded to the opposite side to be caulked. A header tank structure for a heat exchanger as described in 1.   The header tank structure for a heat exchanger according to claim 1 or 2, wherein the insertion hole (35) is formed by removing the vicinity of the tube mounting hole (33). A tank part (31) in which a concave part for refrigerant circulation (31b) is formed inside;
In the header tank structure for a heat exchanger, comprising: a plate portion (32) that is externally fitted to the open side end portion (31c) of the tank portion (31) and seals the circulation recess portion (31b).
The tank portion (31) and the plate portion (32) are temporarily fixed by crimping the outer end of the outer fitting portion (32b) of the plate portion (32) to the tank portion (31) side. Header tank structure for heat exchanger.   A gap (δ) is provided between the front end portion of the outer fitting portion (32b) and the outer side of the open side end portion (31c) of the tank portion (31) before the caulking. The header tank structure for a heat exchanger according to claim 4.   The header tank structure for a heat exchanger according to claim 4 or 5, wherein the caulking is performed by a jig (104) having at least corners of the caulking portion as chamfers (104K) or arcuate surfaces.   The header tank (3) includes a closing plate (200), (200A) that engages with a slit (201) formed in the tank portion (31) and blocks the circulation recess (31b). The caulking position of the outer fitting portion (32b) of (32) is set to an exposed portion (200E) where at least the closing plates (200), (200A) are exposed from the slit (201). Item 7. A header tank structure for a heat exchanger according to any one of Items 4 to 6.

Images