JP4541009B2 - Heat exchanger - Google Patents

Description

  The present invention relates to a heat exchanger having a core in which a plurality of tubes are arranged in parallel between a pair of header tanks formed of a cylindrical member, and in particular, the opening at the end of the header tank is connected to the outside of the core (the tube The present invention relates to a structure that is closed by an end plate provided on the outer side in the parallel direction.

  Conventionally, as this type of heat exchanger, there is a so-called corrugated fin type heat exchanger. As shown in FIG. 15, the heat exchanger 100 includes a core 101 and a pair of header tanks 102 and 102 connected to both ends of the core 101. In the core 101, tubes 103 and corrugated fins 104 are alternately arranged up and down, and an end plate 105 is provided at the uppermost and lowermost positions of the core 101. The header tank 102 is generally composed of a cylindrical member. As this heat exchanger 1, there is one in which the opening at both ends of the header tank 102 is closed using, for example, the end plate 105, so that a dedicated cap is not required and the number of parts can be reduced. (See Patent Document 1 and Patent Document 2).

  In the heat exchanger 100 of Patent Document 1, as shown in FIG. 16, a slit 106 is formed in a half peripheral portion on the core side of the outer peripheral surface of the header tank 102, and the tip of the end plate 105 is inserted into the slit 106. The end plate 105 is brazed to the header tank 102 in a state where the front end surface is abutted against the inner peripheral surface of the header tank 102.

Further, in the heat exchanger of Patent Document 2, as shown in FIG. 17, a pair of slits 106 and 106 through which the end plate 105 passes are formed on the outer peripheral surface of the header tank 102, and the end plate 105 passes through the slit 106. In this state, the end portion 105 a is bent and the end plate 105 is brazed to the header tank 102.
Japanese Utility Model Publication No. 2-122986 Japanese Utility Model Publication No. 4-115278

  However, in the heat exchanger 100 of Patent Document 1, if there are variations in the length and width of the end plate 105, a gap is formed on the abutting surface between the header tank 102 and the end plate 105, and reliable brazing is performed. There is a risk that it will not be possible.

  Further, even in the heat exchanger 100 of Patent Document 2, if there is a variation in the width dimension of the end plate 105, a gap is formed between the inner peripheral surface of the header tank 102 and the side surface of the end plate 105, thereby ensuring brazing. There is a risk that it will not be possible.

  Further, in the configurations of Patent Documents 1 and 2, since it is necessary to provide a certain amount of clearance in order to insert the end plate 105 into the header tank 102, it is difficult to reliably braze the end plate 105 to the header tank 102. Become.

  The present invention was devised in view of such problems, and an object of the present invention is to reliably secure the header tank and the end plate in a heat exchanger having a structure in which both end openings of the header tank are closed with end plates. It is to be able to attach.

  The present invention provides a header tank with protruding edges extending from both side edges of a cylindrical main body and extending in the longitudinal direction of the main body, and a slit through which an end plate passes between both protruding edges. And the entire end face of the main body is closed by an end plate in the slit of the header tank.

  1st invention is equipped with a pair of header tank comprised by the cylindrical member, and the core which has the some tube which was parallelly arranged between both header tanks, and connected both header tanks, The outer side of this core It is premised on a heat exchanger in which the opening at one end or both ends of the header tank is closed by an end plate located at the end.

In the heat exchanger, the header tank has a cylindrical main body portion, and protruding edge portions that protrude from both side edge portions of the main body portion and extend in a longitudinal direction of the main body portion, and an end plate However, the header tank is formed with a width that is larger than the inner diameter of the main body of the header tank and smaller than the full width including the protruding edge, and the header tank has a slit through which the end plate passes between the two protruding edges. And the whole end face of the main body is closed by the end plate in the slit of the header tank .

  In the first invention, when the end plate is inserted into the slit formed in the header tank, the end plate comes into contact with the end face of the header tank in the slit, so that it is difficult to form a gap on the contact face. Therefore, the header tank and the end plate can be brazed around the entire contact surface.

  The second invention is characterized in that, in the heat exchanger of the first invention, both end portions of the end plate are formed in a semicircular shape.

  In the second aspect of the invention, the end plates can be easily inserted into the slits of the header tank by making both end portions of the end plate semicircular.

  The third invention is characterized in that, in the heat exchanger of the first or second invention, the header tank is provided with an end plate introducing portion for guiding insertion of the end plate into the slit.

  In the third aspect of the invention, the end plate can be easily inserted into the slit of the header tank by providing the header plate with the end plate introducing portion that guides the insertion of the end plate into the slit.

  According to a fourth invention, in the heat exchanger according to any one of the first to third inventions, the thickness of the end plate is larger than the thickness of the header tank.

  Here, it is considered that the header tank is cylindrical and has a relatively high pressure resistance, whereas if the end plate is formed of a flat plate material, sufficient pressure resistance cannot be obtained. However, in the fourth aspect of the invention, since the plate thickness of the end plate is larger than the plate thickness of the header tank, it is possible to obtain sufficient pressure resistance for the end plate.

  According to a fifth invention, in the heat exchanger according to any one of the first to fourth inventions, further insertion of the end plate is restricted in a state in which both end portions are inserted into the slits of the header tank to a predetermined position. An insertion restricting portion is provided.

  In the fifth aspect of the invention, when the end plate is inserted into the slit of the header tank, if both end portions of the end plate are inserted into the slit to a predetermined position, further insertion is restricted by the insertion restricting portion. Therefore, when such an insertion restricting portion is not provided, the position of the end plate in the insertion direction is not fixed, and the position of the end plate may be shifted with respect to the header tank. It can be prevented from shifting.

  According to a sixth aspect of the present invention, in the heat exchanger according to the fifth aspect, the width dimension of both end portions where the end plate is inserted into the slit of the header tank is made larger than the width dimension of the intermediate portion positioned between the both end portions. By making it small, it has the step part formed between this intermediate part and both ends as an insertion control part, It is characterized by the above-mentioned.

  In the sixth aspect of the present invention, when the end plate is inserted into the slit of the header tank when the end plate is inserted into the slit of the header tank, further insertion is restricted.

  According to a seventh invention, in the heat exchanger according to any one of the first to sixth inventions, the end plate is made of a clad material in which a coating layer of a brazing material is formed on at least one surface of a plate material. It is a feature.

  In the seventh aspect of the invention, when the end plate is inserted into the slit of the header tank, the surface on which the coating layer of the brazing material is formed faces the core side, and the coating layer of the end plate faces the fin side. And if it carries in in a furnace and heats in this state, an end plate can be brazed to a header tank in the perimeter of a slit.

  According to an eighth invention, in the heat exchanger according to any one of the first to seventh inventions, the header tank is composed of a clad material in which a brazing material coating layer is formed on at least one of the inner peripheral surface and the outer peripheral surface. It is characterized by being.

  In this eighth invention, since the coating layer of the brazing material is formed on at least one side of the inner peripheral surface and the outer peripheral surface of the header tank, it is carried into the furnace with the end plate inserted in the slit and heated. Then, the end plate can be brazed to the header tank all around the slit.

  According to a ninth aspect of the present invention, in the heat exchanger according to any one of the first to eighth aspects, at least a portion of the header tank slit between the outer end surface of the header tank and the end plate is provided. It is characterized by a gap.

  In the ninth aspect, a gap is formed at a position on the outer side of the header tank with respect to the end plate at a joint portion between the header tank and the end plate. Therefore, when water enters the end of the header tank, the water can be discharged from the gap.

  According to a tenth invention, in the heat exchanger according to any one of the first to eighth inventions, the header tank is a first member which is a tube side constituent member of the header tank, and an anti-tube side constituent member. It has a structure in which one end or both ends of one of the first member and the second member is in contact with the core side surface of the end plate.

  In the tenth aspect of the invention, when the end portion of the first member is in contact with the core side surface of the end plate, the slit is not formed in the first member but only in the second member. When the structure is such that the end of the second member is in contact with the core side surface of the end plate, the slit is not formed in the second member but only in the first member. Therefore, it is possible to easily perform the work of inserting the end plate into the slit and assembling it to the header tank. Further, when the upper portion of the core has the above-described structure, water accumulation can be prevented as in the ninth aspect.

  According to an eleventh aspect of the present invention, in the heat exchanger of the tenth aspect, the first member has a first semi-cylindrical member and a first flange projecting from both edges thereof, and the second member is a second member. A semi-cylindrical member and a second flange projecting from both edges of the semi-cylindrical member, wherein one of the first flange and the second flange is formed in an L-shape with a tip bent so as to fit the other; A protruding edge portion of the header tank is formed by integrating the second flange.

  The twelfth invention is the heat exchanger according to any one of the first to ninth inventions, wherein the header tank is a first member that is a tube-side component of the header tank and an anti-tube-side component. A second member, the first member has a first semi-cylindrical member and a first flange projecting from both edges thereof, the second member is a second semi-cylindrical member, and both A second flange projecting from the edge, and one of the first flange and the second flange is formed in an L-shape with the tip bent so as to fit the other, and the first flange and the second flange are integrated. Thus, a protruding edge portion of the header tank is formed.

  In these eleventh and twelfth inventions, the first member and the second member are positioned in the width direction by fitting the other into one of the first flange of the first member and the second flange of the second member. Thus, the work of assembling the end plate to the header tank can be easily performed.

  According to a thirteenth aspect, in the heat exchanger of the eleventh or twelfth aspect, at least one of the first flange and the second flange is formed with a plurality of caulking portions that are caulked and fixed to the other. It is said.

  The fourteenth invention is characterized in that, in the heat exchanger of the thirteenth invention, the caulking portions are formed at regular intervals in the longitudinal direction of the protruding edge portion.

  In these thirteenth and fourteenth inventions, the positions of the first member and the second member can be fixed by caulking the caulking portion, and the header tank is easily assembled from the first member and the second member. Can do.

  According to a fifteenth aspect, in the heat exchanger according to the thirteenth or fourteenth aspect, the caulking portion located on the outer side of the header tank at the protruding edge portion presses the end plate against the end face of the header tank within the slit. It is characterized by being composed.

  In the fifteenth aspect of the invention, the end plate is pressed against the end face of the header tank within the slit by using the caulking portion located on the outer side of the header tank at the protruding edge portion of the header tank. The adhesion between the end face of the plate and the end plate can be improved.

  According to the first aspect of the present invention, the header tank is provided with the cylindrical main body portion and the protruding edge portions protruding from both side edge portions of the main body portion and extending in the longitudinal direction of the main body portion, and the end plate Is formed with a width dimension that is larger than the inner diameter dimension of the main body of the header tank and smaller than the entire width dimension including the protruding edge, and the header tank has an end plate extending between the protruding edges. A slit is formed. As a result, when the end plate is inserted into the slit, the end plate comes into contact with the end surface of the header tank in the slit, and a gap is hardly formed on the contact surface. Therefore, the header tank and the end plate can be brazed around the entire contact surface.

  In the first aspect of the invention, since the end plate penetrates the slit, even if the length and width of the end plate vary, the opening of the header tank is blocked by the end plate in the slit. it can. Therefore, the certainty of brazing can be improved.

  According to the second aspect of the present invention, since both end portions of the end plate are semicircular, the end plate can be easily inserted into the slit of the header tank, so that the assembling property of the end plate to the header tank is improved.

  According to the third aspect of the present invention, since the end plate introducing portion for guiding the insertion of the end plate into the slit is provided in the header tank, the end plate can be easily inserted into the slit of the header tank. End plate assembly is improved.

  According to the fourth aspect of the invention, since the end plate has a plate thickness dimension larger than that of the header tank, the pressure resistance of the end plate can be easily increased.

  According to the fifth aspect of the present invention, the end plate is provided with an insertion restricting portion for restricting further insertion in a state where both end portions are inserted into the slit of the header tank up to a predetermined position. It is possible to prevent the position of the plate from shifting. Therefore, it is possible to easily prevent the quality of the heat exchanger from deteriorating.

  According to the sixth invention, since the step portion is formed by making the width dimension of both end portions of the end plate smaller than the width dimension of the intermediate portion, when inserting the end plate into the slit, When this step portion contacts the periphery of the slit in the header tank, further insertion is restricted, and the position of the end plate can be prevented from shifting. Therefore, it is possible to easily prevent the quality of the heat exchanger from deteriorating.

  According to the seventh aspect of the present invention, when the end plate is inserted into the slit of the header tank, the surface on which the coating layer of the brazing material is formed faces the core side, and is carried into the furnace in this state. When heated, the end plate can be brazed to the header tank all around the slit, so the header tank and the end plate can be easily brazed.

  According to the eighth aspect of the invention, since the coating layer of the brazing material is formed on at least one of the inner peripheral surface and the outer peripheral surface of the header tank, the header plate is carried into the furnace with the end plate inserted in the slit. By simply heating, the end plate can be brazed to the header tank all around the slit. Therefore, brazing can be performed easily.

  According to the ninth aspect of the invention, by providing a gap in at least a part of the slit of the header tank between the outer end face of the header tank and the end plate, water is provided at the end of the header tank. Even if water enters, this water can be discharged from the gap, so that the problem that the end of the header tank corrodes can be prevented.

  According to the tenth aspect of the invention, the slits are formed between the first member and the second member by making one end or both ends of the first member and the second member contact the core side surface of the end plate. Since it is formed only on the other side, it is possible to easily perform an operation of inserting the end plate into the slit when the end plate is assembled to the header tank.

  According to the eleventh and twelfth inventions, the first member and the second member are positioned in the width direction by fitting the other into one of the first flange of the first member and the second flange of the second member. And the header tank can be easily assembled. In addition, since the first member and the second member are securely fixed, the work of assembling the end plate to the header tank can be easily performed.

  According to the thirteenth aspect, since the caulking portion that is caulked and fixed to the other is formed in at least one of the first flange and the second flange, the first member and the second member are caulked. The header tank can be easily assembled.

  According to the fourteenth aspect, since the caulking portions are formed at regular intervals in the longitudinal direction of the protruding edge portion, the caulking portions can be easily formed as compared with the case where the caulking portions are provided at unequal intervals. In addition, it is possible to simplify the configuration of the apparatus that performs the caulking work.

  According to the fifteenth aspect of the present invention, the end surface of the header tank and the end of the header tank are pressed by pressing the end plate against the end surface of the header tank within the slit using the caulking portion located outside the core at the protruding edge of the header tank. Since the adhesion to the plate can be improved, the header tank and the end plate can be brazed more reliably.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Embodiment 1 of the Invention
1 is a front view showing a heat exchanger 1 according to Embodiment 1, FIG. 2 is a partially enlarged view of FIG. 1, FIG. 3 (A) is a partial perspective view, and FIG. 3 (B) is an exploded perspective view. The heat exchanger 1 is used as a condenser of a vehicle air conditioner, and is disposed at the front end of an engine room of a vehicle body, although not shown.

  The heat exchanger 1 includes a core 4 configured by alternately arranging a plurality of tubes 2 and fins 3 extending in the vehicle width direction, and left and right ends of the core 4 (both ends in the longitudinal direction of the tube 2). ) And a pair of header tanks 5 and 6 (a header tank 5 on the left side in the vehicle width direction and a header tank 6 on the right side) arranged in communication with the tube 2. Air flows through the core 4 of the heat exchanger 1 from the front of the vehicle body toward the rear.

  Each tube 2 of the core 4 is a flat tube having an oblong cross section elongated in the longitudinal direction of the vehicle body. On the other hand, the fin 3 is a corrugated fin formed in a waveform when viewed from the air flow direction. The corrugated fin 3 is formed so as to extend substantially from one end to the other end of the tube 2 in the longitudinal direction. These tubes 2 and fins 3 are formed from a thin plate material made of an aluminum alloy. In addition, a so-called clad material in which a brazing material is provided on the surface of the plate material constituting the tube 2 is used.

  As shown in FIG. 2, the interval between the adjacent tubes 2 corresponds to the vertical dimension of the fin 3. The upper end of the fin 3 is brazed to the lower surface of the tube 2 adjacent to the upper side of the fin 3, while the lower end of the fin 3 is brazed to the upper surface of the tube 2 adjacent to the lower side of the fin 3. ing. Further, the upper end plate 7 and the lower end plate 8 are joined to the fins 3 and 3 positioned at the upper end and the lower end of the core 4, respectively. That is, both end plates 7 and 8 are disposed at the upper and lower outer positions of the core 4.

  The left header tank 5 and the right header tank 6 are cylindrical members that are slightly longer than the height of the core 4 (the dimension from the upper surface of the upper end plate 7 to the lower surface of the lower end plate 8). It is configured. Further, the openings at the upper and lower ends of both header tanks 5 and 6 are closed by end plates 7 and 8.

  A refrigerant inflow pipe 9 through which refrigerant flows into the heat exchanger 1 is connected to the upper part of the left header tank 5, and a refrigerant outflow pipe 10 through which refrigerant flows out to the outside is connected to the lower part of the left header tank 5. ing. In addition, a partition plate 11 is provided in the left header tank 5 to divide the refrigerant flow path between the refrigerant inflow pipe 9 and the refrigerant outflow pipe 10 into an inflow side (forward path side) and an outflow side (return path side). Yes.

  Each of the left header tank 5 and the right header tank 6 is divided into two parts at the center in the vehicle width direction (see FIG. 3B). The left header tank 5 is configured by a combination of a first member (tube side constituent member) 15 located on the core 4 side and a second member (anti-tube side constituent member) 16 on the opposite side. Similarly, the first member 17 and the second member 18 are combined. These first members 15 and 17 and second members 16 and 18 are formed by pressing a plate material made of aluminum alloy. The first members 15 and 17 and the second members 16 and 18 are each formed of a clad material having a brazing material coating layer on at least one of the inner peripheral surface and the outer peripheral surface.

  The first member 15 of the left header tank 5 and the first member 17 of the right header tank 6 are configured similarly, and the second member 16 of the left header tank 5 and the second member 18 of the right header tank 6 are similarly configured. It is configured. Therefore, hereinafter, the structure of the first member 15 and the second member 16 of the left header tank 5 will be described, and the description of the first member 17 and the second member 18 of the right header tank 6 will be omitted.

  The first member 15 has a tube insertion side wall portion (first semi-cylindrical member) 15 a for inserting and holding the tube 2. The tube insertion side wall 15a is curved so as to bulge outward from the header tank 5 as shown in FIG. 4 which is a sectional view taken along line IV-IV in FIG. 2 and FIG. 5 which is a sectional view taken along line VV. The second member 16 side is formed in a semi-cylindrical shape that is open. A pair of first flanges 15b, 15b projecting outward from both edges are formed on both open edges of the tube insertion side wall 15a. The pair of first flanges 15 b and 15 b extend in the vertical direction of the header tank 15.

  The second member 16 has an anti-tube insertion side wall (second semi-cylindrical member) 16a facing the tube insertion side wall 15a. The anti-tube insertion side wall portion 16a is curved so as to bulge outward from the header tank 5, and is formed in a semi-cylindrical shape with the first member 15 side open. A pair of second flanges 16b and 16b projecting outward from both edges are formed on both open edges of the anti-tube insertion side wall 16a. The pair of second flanges 16 b and 16 b extend in the vertical direction of the header tank 15. The second flange 16b is formed flat so as to face the first flange 15a in a state where the first member 15 and the second member 16 are combined.

  For example, as shown in FIG. 3A, the header tanks 5 and 6 of this embodiment are configured so that the cylindrical main body 12 and the first member 15 and 17 and the second member 16 and 18 are combined with each other. Projecting edges 13 projecting from both side edges of the main body 12 and extending in the longitudinal direction of the main body 12 are provided. The main body 12 is formed by combining the tube insertion side wall 15a and the anti-tube insertion side wall 16a, and the protruding edge 13 is formed by integrating the first flange 15b and the second flange 16b. ing.

  As shown in FIG. 2 and FIG. 6, which is a side view of the first member 15 of the left header tank 5 viewed from the core 4 side, the first member 15 has a tube insertion hole 15 c corresponding to the outer shape of the tube 2. It forms corresponding to the space | interval of the tube 2, and the edge part of the tube 2 is brazed to the periphery of the tube insertion hole 15c. As shown in FIGS. 4 and 6, the tube insertion hole 15c is formed in a slit shape from the center in the projecting direction of one first flange 15b to the center in the projecting direction of the other first flange 15b.

  The peripheral edge of the tube insertion hole 15c in the first flange 15b is formed so as to be recessed toward the side away from the second flange 16b opposed to the peripheral edge, thereby forming a recess 15d. Accordingly, as shown in FIGS. 2 and 4, a space S is formed between the recess 15d and the second flange 16b facing the recess 15d. Further, the adjacent recesses 15d, 15d of the first flange 15b are formed flat so as to be joined to the second flange 16b, thereby constituting a joint 15e.

  The distal end side of the first flange 15b is bent at a substantially right angle toward the second flange 16b at a portion corresponding to the distal end of the second flange 16b. A caulking portion 15g that is caulked and fixed to the second flange 16b is formed as a bent piece at a portion corresponding to the joint portion 15e on the distal end side of the first flange 15b. The first member 15 and the second member 16 are integrated by bending the caulking portion 15g along the surface of the second flange 16b. The caulking portions 15g are formed at regular intervals in the longitudinal direction of the protruding edge portion 13. The caulking portion 15g is not necessarily formed on the first flange 15b, but if it is formed on one of the first flange 15b and the second flange 16b, the other can be held by caulking. It is.

  The end plates 7 and 8 are wider than the width dimension W1 of the main body 12 of the header tanks 5 and 6 as shown in FIG. 7 which is an enlarged view of the left header tank 5 of the heat exchanger 1 as viewed from above. In addition, the width W is smaller than the total width W2 including the protruding edge 13. In addition, the header tanks 5 and 6 are formed with slits 14 through which the end plates 7 and 8 pass between the protruding edge portions 13 (FIGS. 2 and 3B). And the opening of both ends of the header tanks 5 and 6 is closed by passing the end plates 7 and 8 through the slits 14. That is, the entire end surface of the main body 12 is closed by the end plates 7 and 8 in the slits 14 of the header tanks 5 and 6.

  The end plates 7 and 8 are made of a material whose plate thickness is larger than that of the header tanks 5 and 6. As shown in FIG. 7, both end portions of the end plates 7 and 8 are formed in a semicircular shape having a slightly larger radius than the outer peripheral surface of the main body portion 12. The end plates 7 and 8 are made of a clad material in which a brazing material coating layer is formed on at least one side of the plate material, and are fixed to the header tanks 5 and 6 so that the brazing material coating layer faces the core 4 side. Is done. That is, the end plates 7 and 8 are fixed to the header tanks 5 and 6 so that the coating layers of the brazing material face each other.

  On the other hand, as shown in FIG. 2, the header tanks 5 and 6 are provided with end plate introduction portions 14 a that guide the insertion of the end plates 7 and 8 into the slits 14. The end plate introducing portion 14a is formed by making the periphery of the slit 14 in the tube insertion side wall portion 15a into a rounded surface or a tapered surface. The end plate introducing portion 14a is configured such that the opening width of the slit 14 increases from the inner diameter side of the header tanks 5 and 6 toward the outer shape side.

  The flow of the refrigerant in the heat exchanger (condenser) 1 is as follows.

  First, the refrigerant supplied from a compressor (not shown) flows from the refrigerant inflow pipe 9 into the left header tank 5. The refrigerant flowing into the left header tank 5 flows into each tube 2 on the forward path side while flowing downward in the header tank 5 to the partition plate 11. The refrigerant flowing into each tube 2 exchanges heat with air while flowing through the tube 2 toward the right side of the vehicle body, and gathers in the right header tank 6. The refrigerant in the right header tank 6 flows downward in the right header tank 6 and flows into each tube 2 on the return path side. The refrigerant flowing into each tube 2 exchanges heat with air while flowing through the tube 2 toward the left side of the vehicle body, and returns to the left header tank 5. As described above, the refrigerant that has flowed into the left header tank 5 from the refrigerant inflow pipe 9 is condensed by exchanging heat with air when flowing through the tube 2 on the forward path side and the return path side, and then externally from the refrigerant outflow pipe 10. Spill to

  When manufacturing the heat exchanger 1 of the present embodiment, first, the tubes 4 and the fins 3 are alternately arranged and fixed by a jig (not shown) to form the core 4, and both the upper and lower sides of the core 4. The end plates 7 and 8 are arranged at the positions. At the same time, the left header tank 5 is assembled by assembling the first member 15 and the second member 16, and the right header tank 6 is assembled by assembling the first member 17 and the second member 18.

  When the left header tank 5 is assembled, when the first member 15 and the second member 16 are combined, the joint 15e of the first flange 15b contacts the second flange 16b as shown in FIGS. On the other hand, as shown in FIGS. 2 and 4, a space S is formed between the recess 15d of the first flange 15b and the second flange 16b. In this state, the caulking portion 15g of the first member 15 is bent and the first member 15 and the second member 16 are caulked and fixed. The right header tank 6 is assembled in the same manner.

  Thereafter, end plates 7 and 8 are inserted into the upper and lower slits 14 of the left header tank 5 and the right header tank 6 to close the opening at both ends of the header tanks 5 and 6. Both ends of each tube 2 of the core 4 are inserted into the tube insertion holes 15c. As the tube 2 is inserted into the tube insertion hole 15c, the end of the tube 2 protrudes from the first flange 15b toward the space S and comes into contact with the second flange 16b, preventing further movement in the insertion direction. Is done. After assembling each member in this way, although not shown, each member is fixed by a jig and integrated, and then carried into a furnace and heated. Then, the brazing material melts and flows through the joint surfaces of the respective members of the heat exchanger 1, and the members are joined after cooling.

  In the brazing process, a force that separates the two members 15 and 16 may act on the first member 15 and the second member 16 due to vibration during loading into the furnace or deformation during heating. . However, since the first member 15 and the second member 16 are caulked and fixed, the positional deviation of these members 15 and 16 is prevented. In addition, since the caulking portion 15g is provided corresponding to the joint portion 15e of the first flange 15b, the flanges 15b and 16b can be brought into contact with each other by reliably bringing the flanges 15b and 16b into contact with each other. Can be brazed firmly.

  Further, since the left header tank 5 is constituted by the combination of the first member 15 and the second member 16, the first member 15 and the second member 16 can be molded separately. Thereby, shaping | molding becomes easy compared with the case where the tube insertion side wall part 15a and the anti-tube insertion side wall part 16a are shape | molded integrally in a cylinder shape.

  Moreover, since the tube insertion side wall part 15a of the 1st member 15 and the anti-tube insertion side wall part 16a of the 2nd member 16 are formed in the curved surface shape, when these 1st member 15 and the 2nd member 16 are combined, The whole main body 12 that is the peripheral wall portion of the header tank 5 constitutes a continuous curved surface. For this reason, pressure resistance can be obtained without increasing the thickness of the first member 15 and the second member 16, so that the header tank 5 can be reduced in weight.

  Furthermore, in the first embodiment, the entire end surface of the main body 12 is closed by the end plates 7 and 8 in the slits 14 of the header tanks 5 and 6. , 8 can be securely brazed all around the slit 14.

  In addition, since the both end openings of the header tanks 5 and 6 can be closed by simply inserting the end plates 7 and 8 into the slits 14 of the header tanks 5 and 6 when the heat exchanger 1 is assembled, the assembly work is facilitated. be able to. Furthermore, since the end plates 7 and 8 are positioned by the slits 14 after assembly, the end plates 7 and 8 are not deformed and warped even when heated during brazing, so that brazing should be performed securely. Can do.

  Further, the end portions of the end plates 7 and 8 inserted into the slits 14 are formed into a semicircular shape, and the end portions 7 and 8 for guiding the insertion of the end plates 7 and 8 into the slits 14 are guided to the body portions 12 of the header tanks 5 and 6 Since the plate introduction part 14a is provided, the assembling property of the end plates 7 and 8 to the header tanks 5 and 6 can be improved.

  Furthermore, since the end plates 7 and 8 can be simultaneously inserted into the slits 14 when the tubes 2 are inserted into the tube insertion holes 15c of the header tanks 5 and 6, the assembling work can be facilitated also in this respect.

  Further, the end plates 7 and 8 are formed of a flat plate material. Since the plate thickness dimension of the end plates 7 and 8 is larger than the plate thickness dimension of the header tanks 5 and 6, 8 pressure resistance can be improved.

  In the present embodiment, all the openings of the header tanks 5 and 6 are closed by the end plates 7 and 8, but only the opening on one side can be the structure of the present embodiment.

(Modification 1)
In the above embodiment, the recess 15d is formed in the first flange 15b, while the second flange 16b is formed flat to form a space between the flanges 15b, 16b. As in Modification 1, the left and right sides may be reversed. That is, in this case, the recess 16d and the joint 16e are formed in the second flange 16b, while the first flange 15b is formed flat. Further, a caulking portion 16g is formed on the second flange 16b and is caulked and fixed to the first flange 15b.

(Modification 2)
Modification 2 is an example in which the insertion of the end plates 7 and 8 is restricted with respect to the slits 14 of the header tanks 5 and 6.

  Specifically, as shown in FIG. 9, the end plates 7 and 8 have the width dimensions of both end portions 7a and 8a inserted into the slits 14 of the header tanks 5 and 6 between the both end portions 7a and 8a. Step portions 7c and 8c are formed between the intermediate portions 7a and 8b and the both end portions 7a and 8a by making it smaller than the width dimension of the positioned intermediate portions 7b and 8b. The step portions 7c and 8c are provided as insertion restricting portions that restrict further insertion when both end portions 7a and 8a of the end plates 7 and 8 are inserted into the slits 14 of the header tanks 5 and 6 to a predetermined position. ing.

  If it does in this way, if the step parts 7c and 8c contact | abut the surface around the slit 14 with respect to the 1st members 15 and 17, the end plates 7 and 8 will not be inserted in the slit 14 any more. For this reason, the positions of the end plates 7 and 8 are not biased to either the left or right of the heat exchanger 1. Therefore, since the end plates 7 and 8 are surely in contact with the entire end surfaces of the header tanks 5 and 6 in the slit 14, more reliable brazing is possible.

(Modification 3)
The third modification is another example in which the insertion of the end plate 7 is restricted with respect to the slits 14 of the header tanks 5 and 6.

  Specifically, as shown in FIG. 10, the end plate 7 has a projection 7 d extending in the longitudinal direction of the end plate 7 on the surface on the core 4 side. And this protrusion 7d is formed in the length which corresponds to the internal dimension of the tube insertion side wall parts 15a in the left header tank 5 and the right header tank 6, or slightly shorter than that. By doing so, it is possible to obtain the same effect as that of the second modification of FIG.

  Further, in this modified example 3, when assembling the heat exchanger 1, when the members are temporarily assembled and fixed with a jig, the projection 7d slightly deforms the fin 3 and bites the fin 3. Will be included. For this reason, it can prevent simply and reliably that the positional relationship of the fin 3 will shift | deviate when carrying in in a furnace in the state which fixed each member of the heat exchanger 1 with the jig | tool.

(Modification 4)
Modification 4 is an example in which the upper end portions of the header tanks 5 and 6 are prevented from accumulating inside the header tanks 5 and 6 above the end plate 7.

  Specifically, as shown in FIG. 11, a gap 5 a is provided between the end plate 7 and the end face 7 of the header tank 5, 6 on the outer side of the header tank 5, 6. The gap 5a is formed only on the second member 16, 18 side by widening the slit 14 on the second member 16, 18 side, and is formed on the first member 15, 17 side. Absent.

  If it does in this way, even if water will enter into the main-body part 12 from upper direction in the upper end part of the header tanks 5 and 6, this water will be discharged | emitted from the header tanks 5 and 6 through the said clearance gap 5a. Therefore, if water accumulates in this portion, the heat exchanger 1 may be corroded, but such a problem can be avoided.

  The gap 5a may be formed on the first members 15 and 17 side, or may be formed on both the first members 15 and 17 and the second members 16 and 18. Further, the gap 5a may be formed in an arbitrary size at an arbitrary position of the main body 12 as long as water can be discharged from the inside of the main body 12.

<< Embodiment 2 of the Invention >>
Next, Embodiment 2 of the present invention will be described with reference to FIGS. In the second embodiment, only the configuration of the header tanks 5 and 6 is different from the first embodiment. Hereinafter, the left header tank 5 will be described.

  Similarly to the first embodiment, the left header tank 5 includes a first member 15 that is a tube side constituent member and a second member 16 that is an anti-tube side constituent member. The second member 16 is formed with a length dimension corresponding to the inner width dimension between the pair of end plates 7 and 8 positioned above and below the core 4. 8 is in contact with the side surface of the core.

  The first member 15 includes a tube insertion side wall portion 15a that is a first semi-cylindrical member, and a first flange 15b that projects outward from both edges thereof, and the second member 16 is a second semi-cylindrical member. It has an anti-tube side insertion wall portion 16a that is a member, and a second flange 16b that protrudes outward from both edge portions thereof. And the protrusion edge part 13 of the header tank 5 is formed by integrating the 1st flange 15b and the 2nd flange 16b.

  In the first flange 15 b, caulking portions 15 g that are caulked and fixed to the second flange 16 b are formed at regular intervals in the longitudinal direction of the protruding edge portion 13. The caulking portion 15g located on the outermost side of the header tank 5 is configured to press the end plates 7 and 8 against the end face of the header tank 5 in the slit 14.

  Since the other points are configured in the same manner as in the first embodiment, detailed description thereof is omitted.

  If comprised in this way, since the slit 14 is formed only in the tube insertion side wall part 15a, what is necessary is just to insert the end plates 7 and 8 only in the tube insertion side wall part 15a with respect to the header tank 5, and an assembly | attachment becomes still easier. Become. On the other hand, the end portions of the end plates 7 and 8 are held in a state of being pressed against the end surface of the header tank 5 in the slit 14 by the caulking portion 15g located on the outside thereof. Accordingly, there is no fear that a brazing defect will occur due to deformation by heating during brazing.

  Further, in the second embodiment, since the caulking portions 15g of the header tank 5 are formed at regular intervals in the longitudinal direction of the protruding edge portion 13, the caulking portion 15g can be easily formed. Further, as compared with the case where the caulking portions 15g are formed at unequal intervals, it is possible to simplify the configuration of the apparatus that performs the caulking work.

  Note that it is not necessary to apply the structure of the present embodiment to all the openings of the header tanks 5 and 6, and it is possible to make only one side opening the structure of the present embodiment.

(Modification)
14 shows a first embodiment in which the first member 15 has a length dimension corresponding to the inner width dimension between the pair of end plates 7 and 8 positioned above and below the core 4 in the first modification of the first embodiment shown in FIG. This is an example of formation. That is, the second and the second embodiments in FIGS. 12 and 13 have a structure in which the left and right are reversed. In this modification as well, the caulking portion 16g is configured to press the end portions of the end plates 7 and 8 against the end surface of the header tank 5 in the slit 14.

  In this modification, since the slit 14 is formed only in the anti-tube insertion side wall portion 16a, the end plates 7 and 8 need only be inserted into the anti-tube insertion side wall portion 16a with respect to the header tank 5, and the assembly is easy. Yes. Further, the end portions of the end plates 7 and 8 are held in a state of being pressed against the end surface of the header tank 5 in the slit 14 by the caulking portion 16g located on the outer side thereof, so that they are deformed by heating at the time of brazing. There is no risk of poor brazing.

  In this modification, the caulking portion 16g that presses the end plates 7 and 8 is different in interval from the other caulking portions 16g, and may be set at any desired position. That is, the caulking portions 16g are not necessarily formed at regular intervals.

<< Other Embodiments >>
The present invention may be configured as follows with respect to the first embodiment.

  For example, in each of the above embodiments, the width of the end plates 7, 8 is larger than the outer diameter of the main body 12 of the header tanks 5, 6. , 6 as long as it is larger than the inner diameter.

  Moreover, although each said embodiment has demonstrated the case where this invention is applied to the condenser of an air conditioner, this invention is applicable also to an evaporator and a gas cooler, for example.

  As described above, the present invention is useful for a heat exchanger having a structure in which the opening at both ends of a pair of header tanks constituted by cylindrical members is closed by the end plate of the core.

It is a front view which shows the heat exchanger of Embodiment 1. It is the elements on larger scale of FIG. 3A is a partial perspective view of the heat exchanger of FIG. 1, and FIG. 3B is an exploded perspective view. It is the IV-IV sectional view taken on the line of FIG. It is the VV sectional view taken on the line of FIG. It is the side view which looked at the 1st member of the left header tank from the core side. It is the enlarged view which looked at the left side header tank of the heat exchanger from upper direction. It is a figure which shows the modification 1 of Embodiment 1. FIG. It is a figure which shows the modification 2 of Embodiment 1. FIG. FIG. 6 is a diagram showing a third modification of the first embodiment. It is a figure which shows the modification 4 of Embodiment 1. FIG. It is the elements on larger scale of the heat exchanger of Embodiment 2. FIG. It is a fragmentary perspective view of the heat exchanger of Embodiment 2. It is a figure which shows the modification of Embodiment 2. FIG. It is a perspective view of the conventional heat exchanger. It is a perspective view which shows the principal part of the conventional 1st heat exchanger. It is a perspective view of the conventional 2nd heat exchanger.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat exchanger 2 Tube 3 Fin 4 Core 5 Left header tank 5a Clearance 6 Right header tank 7, 8 End plate 7a Both ends 8a Both ends 7b Intermediate part 8b Intermediate part 7c Step part (insertion restriction part)
8c Step (insertion restricting part)
12 body part 13 protruding edge part 14 slit 14a end plate introducing part 15 first member 15a tube insertion side wall part (first semi-cylindrical member)
15b First flange 15g Caulking portion 16 Second member 16a Anti-tube insertion side wall portion (second semi-cylindrical member)
16b Second flange 16g Caulking portion

Claims (15)

A pair of header tanks formed of a cylindrical member, and a core having a plurality of tubes that are juxtaposed between both header tanks and communicate with each other, and an end plate positioned outside the core. A heat exchanger in which the opening on one side or both ends of the header tank is closed,
The header tank has a cylindrical main body, and protruding edges that protrude from both side edges of the main body and extend in the longitudinal direction of the main body.
The end plate is formed with a width dimension that is larger than the inner diameter dimension of the main body of the header tank and smaller than the total width dimension including the protruding edge,
In the header tank, a slit through which the end plate passes is formed between both protruding edges ,
A heat exchanger characterized in that the entire end face of the main body is closed by an end plate in the slit of the header tank . The heat exchanger according to claim 1,
A heat exchanger characterized in that both end portions of the end plate are formed in a semicircular shape. The heat exchanger according to claim 1 or 2,
A heat exchanger, wherein the header tank is provided with an end plate introducing portion for guiding insertion of the end plate into the slit. The heat exchanger according to any one of claims 1 to 3,
A heat exchanger characterized in that the thickness of the end plate is larger than the thickness of the header tank. The heat exchanger according to any one of claims 1 to 4,
An end plate is provided with an insertion restricting portion for restricting further insertion in a state where both end portions are inserted into the slits of the header tank to a predetermined position. The heat exchanger according to claim 5,
The end plate is formed between the intermediate part and both end parts by making the width dimension of both end parts inserted into the slit of the header tank smaller than the width dimension of the intermediate part located between the both end parts. A heat exchanger comprising the stepped portion as an insertion restricting portion. The heat exchanger according to any one of claims 1 to 6,
The end plate is composed of a clad material in which a brazing material coating layer is formed on at least one side of a plate material. The heat exchanger according to any one of claims 1 to 7,
The header tank is composed of a clad material in which a brazing material coating layer is formed on at least one of an inner peripheral surface and an outer peripheral surface. The heat exchanger according to any one of claims 1 to 8,
A heat exchanger characterized in that a gap is provided at least partially between an end face of the header tank on the outer side of the slit of the header tank and the end plate. The heat exchanger according to any one of claims 1 to 8,
The header tank has a first member that is a tube-side component of the header tank and a second member that is an anti-tube-side component.
A heat exchanger characterized in that one end or both ends of one of the first member and the second member are in contact with the core side surface of the end plate. The heat exchanger according to claim 10,
The first member has a first semi-cylindrical member and a first flange projecting from both edges thereof,
The second member has a second semi-cylindrical member and a second flange projecting from both edges thereof,
One of the first flange and the second flange is formed in an L shape with the tip bent so as to fit the other,
A projecting edge portion of the header tank is formed by integrating the first flange and the second flange. The heat exchanger according to any one of claims 1 to 9,
The header tank has a first member that is a tube-side component of the header tank and a second member that is an anti-tube-side component.
The first member has a first semi-cylindrical member and a first flange projecting from both edges thereof,
The second member has a second semi-cylindrical member and a second flange projecting from both edges thereof,
One of the first flange and the second flange is formed in an L shape with the tip bent so as to fit the other,
A projecting edge portion of the header tank is formed by integrating the first flange and the second flange. The heat exchanger according to claim 11 or 12,
At least one of the first flange and the second flange is formed with a plurality of caulking portions that are caulked and fixed to the other. The heat exchanger according to claim 13,
A heat exchanger, wherein the caulking portions are formed at regular intervals in the longitudinal direction of the protruding edge portion. The heat exchanger according to claim 13 or 14,
A heat exchanger characterized in that the caulking portion located on the outer side of the header tank at the protruding edge portion is configured to press the end plate against the end face of the header tank within the slit.