Heat exchanger collector, heat exchanger, method for manufacturing a heat exchanger collector and method for manufacturing a heat exchanger

Abstract

Heat exchanger collector (100) comprising: a first collector element (110) which includes a pipe limiter (112), wherein the pipe limiter (112) is part of a pipe (150) which includes a flow path (Mf) for the heat transfer medium so that it circulates through the flow path (Mf); and a second collector element (320; 420) connected to the pipe limiter (112) to limit the pipe (150) together with the pipe limiter (112), wherein the second collector element (320; 420) comprises a curved section (121) with an inlet opening (350; 450) for receiving a heat transfer line (20), the inlet opening (350; 450) having an opening wall (350a, 350b; 450a, 450b) extending over the entire circumference of the opening wall (350a, 350b; 450a, 450b) along the inlet opening (350;450) the heat transfer line (20) extends, the second collector element (320) has an outer surface (320a) with a cross-sectional surface (360) along an edge of the inlet opening (350) over its entire circumference, and the opening wall (350a, 350b; 450a, 450b) of the inlet opening (350; 450) runs parallel over its entire circumference to a direction along which the heat transfer line (20) is routed.

Description

Technical field

[0001] The present disclosure relates to a heat exchange header, a heat exchanger, a method for manufacturing a heat exchange header and a method for manufacturing a heat exchanger. Technological background

[0002] A common heat exchanger, such as one found in an air conditioner or refrigeration unit, comprises a finned-line heat exchanger that performs heat exchange by circulating a heat transfer fluid through heat transfer lines equipped with radiating fins. The finned-line heat exchanger includes a heat exchanger manifold that distributes the heat transfer fluid to the multiple heat transfer lines for circulation.

[0003] Patent literature 1 describes a heat exchanger manifold comprising a thin plate adjacent to an inlet opening formed by piercing a heat transfer line. This thin plate can absorb a portion of the internal pressure acting on the heat exchanger manifold, thereby reducing the stress on the area surrounding the inlet opening in the heat transfer line. This increases the pressure resistance of the heat exchanger manifold. Citation list for patent literature

[0004] Patent literature 1: Japanese patent no. JP 4 533 374 Brief description of the invention: Technical problem

[0005] The heat exchanger manifold described in patent reference 1 has the inlet opening in a flat section. Therefore, the structure for increasing the manifold's pressure resistance is also located in this flat section. However, if an inlet opening is to be arranged in a curved section of a heat exchanger manifold, the structure described in patent reference 1, where the inlet opening is located in a flat section, cannot be readily used.

[0006] In response to the above problem, one objective of the present disclosure is to provide a heat exchanger manifold, a heat exchanger, a method for manufacturing a heat exchanger manifold and a method for manufacturing a heat exchanger which increase the connection strength with a heat transfer line connected with a bent / curved section and improve the pressure resistance. Solution to the problem

[0007] A heat exchanger manifold according to one aspect of the present disclosure comprises a first manifold element and a second manifold element. The first manifold element comprises a first tube and a tube limiter. The first tube contains a bypass flow path for a heat transfer fluid circulating through the bypass flow path. The tube limiter is part of a second tube containing a main flow path for the heat transfer fluid circulating through the main flow path. The second manifold element is connected to the tube limiter and, together with the tube limiter, defines the second tube. The second manifold element comprises a bent / curved section with an inlet opening for receiving a heat transfer line. The inlet opening has an opening wall that extends around the entire circumference of the opening wall along the heat transfer line received in the inlet opening. Advantageous effects of the invention

[0008] The heat exchanger manifold according to the preceding aspect of this disclosure comprises the opening wall of the inlet opening with a curved section extending around the entire circumference along the heat transfer line received in the inlet opening. This structure increases the strength of the connection with the heat transfer line to which the curved section is attached and increases the compressive strength. List of characters Fig. Figure 1 is a top view of a heat exchanger according to embodiment 1; Fig. Figure 2 is a perspective view of a heat transfer line in embodiment 1; Fig. Figure 3 is a perspective exploded view of a heat exchanger collector according to embodiment 1; Fig. 4A is an exploded view of the heat exchanger collector according to embodiment 1; Fig. 4B is a cross-sectional view of the heat exchanger collector according to embodiment 1; Fig. 5 is a diagram of an inlet opening in a second collector element, as seen in the Fig. 3. Direction indicated by arrow V; Fig. 6A is a cross-sectional view of the second collector element in embodiment 1 along the VIA-VIA line. Fig. 5; Fig. Figure 6B is a cross-sectional view of the second collector element in embodiment 1 along the line VIB-VIB of Fig. 5; Fig. Figure 7 is a diagram describing the flow rate of a heat transfer medium through the heat exchanger according to embodiment 1; Fig. Figure 8A is a diagram that describes step-by-step a method for producing the second collector element in embodiment 1; Fig. Figure 8B is a diagram that describes step-by-step a method for producing the second collector element in embodiment 1; Fig. Figure 8C is a diagram describing a method for producing the second collector element in embodiment 1, as shown in the Fig. 8B, direction indicated by arrow C; Fig. 9A is a diagram that step-by-step describes a method for producing the second collector element in embodiment 1 following the methods in Fig. 8A and Fig. 8B describes; Fig. 9B is a diagram that step-by-step describes a method for producing the second collector element in embodiment 1 following the methods in Fig. 8A and Fig. 8B describes; Fig. Figure 10 is a cross-sectional view of the second collector element in embodiment 1, which accommodates the heat transfer line; Fig. 11 is a front view of an insertion opening in a second collector element in embodiment 2; Fig. 12A is a cross-sectional view of the second collector element in embodiment 2 along line XIIA-XIIA of Fig. 11; Fig. Figure 12B is a cross-sectional view of the second collector element in embodiment 2 along line XIIB-XIIB of Fig. 11; Fig. 13A is a cross-sectional view of a second collector element in embodiment 3; Fig. 13B is a diagram of the second collector element in embodiment 3, which is drawn; Fig. Figure 14A is a diagram describing a method for manufacturing the second collector element in a modification of embodiment 1; and Fig. Figure 14B is a diagram that describes step-by-step a method for manufacturing the second collector element in a modification of embodiment 1. Description of embodiments

[0009] A heat exchanger collector, a heat exchanger, a method for manufacturing a heat exchanger collector and a method for manufacturing a heat exchanger according to one or more embodiments of the present disclosure are described below with reference to the drawings. Design 1

[0010] A heat exchanger 1 according to embodiment 1 performs a heat exchange between air flowing outside the heat exchanger 1 and a heat transfer medium flowing through the heat exchanger 1. As in Fig. As shown in Figure 1, the heat exchanger 1 comprises heat transfer lines 20, which allow the heat transfer medium to circulate through the heat transfer lines 20, a heat exchanger collector 500, which is connected to the heat transfer lines 20 so that the heat transfer medium can flow into the heat transfer lines 20, a heat exchanger collector 100, which is connected to the heat transfer lines 20 so that the heat transfer medium can flow out of the heat transfer lines 20, a connecting pipe 130, which allows the heat transfer medium to flow out of the heat exchanger collector 100, and radiation fins 30 attached to the heat transfer lines 20.

[0011] As in Fig. As shown in Figure 2, each heat transfer line 20 has a flat cross-section with arcuate short sides and straight long sides. More precisely, each heat transfer line 20 has a rectangular prismatic section 20a with semi-cylindrical sections 20b connected to the two sides of the rectangular prismatic section 20a. Each heat transfer line 20 also has circulation openings 20c through which the heat transfer fluid can circulate. Each heat transfer line 20 with this flat cross-section can reduce the ventilation resistance around the heat transfer line 20 and improve the efficiency of the heat exchange.

[0012] The heat transfer lines 20 are formed using a known processing technique such as extrusion or drawing. The heat transfer lines 20 are made of an aluminum alloy with an outer surface onto which zinc is sprayed to form a sacrificial anode layer. This sacrificial anode layer on the outer surface can reduce the leakage of the heat transfer fluid due to corrosion in the heat transfer lines 20.

[0013] Each heat transfer line 20 has an end that is inserted into an inlet opening 50 in the heat exchanger collector 100, which is located in the Fig. 1 and Fig. 3 is shown, taken up and brazed and fastened to the heat exchanger manifold 100 by brazing. The other end of each heat transfer line 20 is inserted into an insertion opening 550 in the Fig. 1 heat exchanger collector 500 shown, taken up and brazed and fastened to the heat exchanger collector 500 by brazing.

[0014] The radiation fins 30 are flat elements with a large surface area exposed to the air to improve cooling efficiency. As shown in Fig. As shown in Figure 1, several radiation fins 30 are attached to each heat transfer line 20. The radiation fins 30 are formed, for example, from a coated material comprising an aluminum plate with a hard solder applied to its surface. Each radiation fin 30 has a thickness of approximately 0.09 mm to 0.2 mm.

[0015] As in Fig. As shown in Figure 1, each radiation fin 30 has several through-openings 30a through which the heat transfer lines 20 extend. Each through-opening 30a is a shallow hole or cutout to allow the associated flat heat transfer line 20 to extend through the opening. Each through-opening 30a accommodates the associated heat transfer line 20. The connections between the accommodated heat transfer lines 20 and the radiation fins 30 are brazed to connect the radiation fins 30 and the heat transfer lines 20.

[0016] As in Fig. As shown in Figure 1, the radiation fins 30 are attached side by side to the heat transfer lines 20 in the longitudinal direction or in the flow direction of the heat transfer medium.

[0017] The heat exchanger manifolds 100 and 500 are a pair of lines that feed the heat transfer fluid or other fluid into and out of the heat exchanger 1. The heat exchanger manifold 100 has inlet openings 50, and the heat exchanger manifold 500 has inlet openings 550. Each heat transfer line 20 is received by the corresponding inlet opening 50 or 550 for connection to the heat exchanger manifolds 100 and 500.

[0018] As in Fig. 3, Fig. 4A and Fig. As shown in 4B, the heat exchanger collector 100 comprises a first collector element 110, a second collector element 120 and caps 140.

[0019] The first collector element 110 comprises a first tube 111 with a bypass flow path Bf, and a tube restrictor 112, which, together with the second collector element 120 to be connected, restricts / defines a second tube 150 with a main flow path Mf. The first collector element 110 is a component made of an aluminum alloy, which includes the first tube 111 and the tube restrictor 112, formed in one piece by extrusion. The outer surface of the first collector element 110 is zinc-coated to form a sacrificial anode layer. This structure can reduce the leakage of the heat transfer fluid due to corrosion of the heat exchanger collector 100.

[0020] The first pipe 111 has a longitudinally extending through-opening 111a with a circular cross-section. The through-opening 111a serves as a bypass flow path Bf, which enables the circulation of the heat transfer fluid. As in Fig. As shown in Figure 3, the first pipe 111 includes a connecting pipe connector 111b, which is connected to the connecting pipe 130 (described below). The connecting pipe connector 111b is a cut in the middle of the first pipe 111. The connecting pipe connector 111b is cut in shape and size to accommodate the connecting pipe 130.

[0021] As in Fig. As shown in Figure 3, the pipe restrictor 112 limits a portion of the main flow path Mf, which extends parallel to the bypass flow path Bf. The pipe restrictor 112 is formed integrally with the first pipe 111 over its entire length. The pipe restrictor 112 has a semicircular cross-section. As shown in the Fig. 3 and Fig. As shown in Figure 7, the pipe limiter 112 has a connecting pipe opening 112a in a section corresponding to the connecting pipe connector 111b. The connecting pipe opening 112a has a hole diameter that is less than or equal to the outer diameter of the connecting pipe 130. Thus, the connecting pipe 130 is pressed into the connecting pipe opening 112a to be temporarily attached to the first collector element 110.

[0022] As in Fig. As shown in Figure 3, the pipe restrictor 112 has connecting sections 113 which are connected along the two edges of the pipe restrictor 112 to the second collector element 120 in the direction in which the main flow path Mf extends. The connecting sections 113 extend over the entire length of the pipe restrictor 112.

[0023] As in Fig. As shown in Figure 7, the first collector element 110 has a bypass opening 110a to connect the main flow path Mf with the bypass flow path Bf. The bypass opening 110a and the through-openings 130a in the connecting pipe 130 (described below) form a bypass circuit for the heat transfer fluid, which flows out of the path through the connecting pipe 130.

[0024] As in Fig. 3, Fig. 4A and Fig. As shown in Figure 4B, the second collector element 120 is an elongated component with a U-shaped cross-section, connected to the first collector element 110 to limit / define a section of the main flow path Mf in the heat exchanger collector 100. More precisely, the second collector element 120 is connected to the pipe limiter 112 to limit / define the second pipe 150 together with the pipe limiter 112. The second collector element 120 is formed from a coated material comprising an aluminum plate with a brazing alloy applied to its surface. As shown in Fig. As shown in Figure 4A, the second collector element 120 comprises a semicircular section 121 with a semicircular cross-section and two flat sections 122 which are connected to the ends of the semicircular section 121.

[0025] As in Fig. 4A and Fig. As shown in Figure 4B, the second collector element 120 comprises connecting recesses 120a. The connecting recesses 120a are formed by punching the inner surface of the second collector element 120, which has a U-shaped cross-section. The connecting recesses 120a extend longitudinally over the entire length of the second collector element 120. The connecting recesses 120a are located at two positions on the inner surface of the second collector element 120. The connecting sections 113 of the first collector element 110 fit into the connecting recesses 120a when the first collector element 110 and the second collector element 120 are assembled. In this state, the flat sections 122 in the second collector element 120 have distal ends that extend beyond the connecting recesses 120a and project laterally from the first collector element 110.The protruding sections of the second collector element 120 are crimped to temporarily join the first collector element 110 and the second collector element 120. When the first collector element 110 and the second collector element 120, temporarily joined together, are heated in a furnace, a layer of brazing alloy melts in the second collector element 120, and the first collector element 110 and the second collector element 120 are soldered together.

[0026] As in Fig. As shown in Figure 3, the second collector element 120 has the inlet openings 50 for receiving the heat transfer lines 20. As shown in Fig. As shown in Figure 6B, the inlet openings 50 are defined in the semicircular section 121, which is an example of a bent / curved section in the second collector element 120. As shown in Fig. As shown in section 5, each insertion opening 50 is a flat elongated hole that matches the profile of each in Fig. 2 corresponds to the heat transfer line 20 shown, when viewed from the front or from the inside. Fig. 3 viewed in the direction indicated by arrow V. The insertion opening 50 has a longitudinal direction extending parallel to the circumferential direction of the semicircular section 121. Each insertion opening 50 is defined by a pair of flat walls 50a corresponding to the rectangular prismatic section 20a of a respective in Fig. 2 shown facing the heat transfer line 20, and a pair of curved walls 50b, which face the semi-cylindrical sections 20b of the in Fig. 2 are facing the heat transfer line 20 shown.

[0027] As in Fig. As shown in Figure 6A, the flat walls 50a extend along a respective heat transfer line 20 received in the inlet opening 50. The direction parallel to the respective heat transfer line 20 is aligned with an X-direction in which the heat transfer line 20 is guided. As shown in Fig. As shown in Figure 6B, the curved walls 50b extend along the heat transfer line 20 received in the inlet opening 50. The X-direction in which the heat transfer line 20 is guided through is aligned with the direction in which each heat transfer line 20 extends, connecting the left heat exchanger collector 100 and the right heat exchanger collector 500 in Fig. 1 connects.

[0028] As in the Fig. 3 and Fig. As shown in Figure 7, each cap 140 comprises a first projection 141, which can be received by the main flow path Mf, and a second projection 142, which can be received by the bypass flow path Bf. The caps 140 are attached to the two ends longitudinally of the first collector element 110 and the second collector element 120. Thus, the caps 140 seal the main flow path Mf and the bypass flow path Bf of the heat exchanger collector 100. The caps 140 consist of a coated material comprising an aluminum plate with a brazing compound applied to the surface. The caps 140 are formed by stamping.

[0029] As in Fig. As shown in Figure 3, the connecting pipe 130 is L-shaped and allows the heat transfer fluid to flow out of the heat exchanger manifold 100. The connecting pipe 130 is received in the connecting pipe opening 112a in the first manifold element 110, thereby connecting the interior of the connecting pipe 130 to the main flow path Mf. The connecting pipe 130 also has the through-openings 130a, which connect the interior of the connecting pipe 130 to the bypass flow path Bf. The through-openings 130a extend through the connecting pipe 130 along the diameter of a circular cross-section in two sections of the connecting pipe 130, as shown in Figure 3. Fig. 7 shown.

[0030] As in Fig. As shown in Figure 1, the heat exchanger collector 500 is connected to one end of each heat transfer line 20, which is opposite an end to which the heat exchanger collector 100 is connected. The heat exchanger collector 500 has the same basic structure as the heat exchanger collector 100 and comprises a first collector element 510, a second collector element 520, and caps 540.

[0031] The heat exchanger collector 500 is connected to an inlet pipe (not shown) to distribute the flowing heat transfer fluid to the heat transfer lines 20.

[0032] The flow of the heat transfer fluid through the heat exchanger 1 is described below with reference to Fig. 7 described. Fig. Figure 7 shows the flow of the heat transfer fluid, represented by arrows. The heat transfer fluid distributed from the heat exchanger manifold 500 to the heat transfer lines 20 flows, after heat exchange, into the main flow path Mf in the heat exchanger manifold 100, as indicated by arrow Y1. Part of the heat transfer fluid in the main flow path Mf flows into the connecting pipe 130, as indicated by arrow Y2, and the remainder flows through the bypass opening 110a into the bypass flow path Bf, as indicated by arrow Y3. The heat transfer fluid in the bypass flow path Bf flows through the through-openings 130a into the connecting pipe 130, as indicated by arrow Y4. The heat transfer fluid in the connecting pipe 130 flows out of the connecting pipe 130, as indicated by arrow Y5.

[0033] As described above, the bypass flow path Bf, which does not include the heat transfer lines 20, can reduce the pressure drop within the heat exchanger manifold 100 and increase the return of refrigeration oil used in a compressor (not shown). Furthermore, the heat exchanger manifold 500, which also includes the bypass flow path Bf, allows the heat transfer fluid to flow uniformly into the main flow path Mf, thereby reducing fluctuations in the flow velocity of the heat transfer fluid flowing through the heat transfer lines 20.

[0034] The following describes a method for manufacturing the second collector element 120, which is encompassed by the heat exchanger collector. First, a plate 200 for manufacturing the second collector element 120 is cut from a flat plate made of an aluminum alloy, and the connecting recesses 120a of Fig. 8A are formed by stamping. Subsequently, as in Fig. As shown in Figure 8A, the cut plate 200 is placed on a (not shown) die and punched in a direction perpendicular to a main surface 200a with a punch 300, which is shaped to create a flat oblong hole with a curved side surface. This creates a through-hole 250 in the plate 200, as shown in Figure 8A. Fig. 8B shown. As in Fig. 8B and Fig. As shown in Figure 8C, each through-hole 250 is a shallow oblong hole with flat walls 250a and curved walls 250b. The flat walls 250a and the curved walls 250b of each through-hole 250 formed in this way extend perpendicular to the main surface 200a of the plate 200. The through-holes 250 are formed by the manufacturing process described below. Fig. The 5 shown insertion openings 50 are reshaped.

[0035] As in Fig. As shown in Figure 9A, the plate 200 with the through-openings 250 is bent such that it has a semicircular section 221 with a semicircular cross-section. The circumferential direction of the semicircular section 221 is aligned with the longitudinal direction of the through-opening 250 when the plate 200 is bent. The bent plate 200 extends straight in a direction perpendicular to the side of Fig. 9A, without being bent / curved.

[0036] The curved walls 250b, which are perpendicular to the main surface 200a before the plate 200 is bent, remain essentially perpendicular to the main surface 200a after the plate 200 has been bent, without substantially changing the angle to the main surface 200a. As in Fig. As shown in Figure 9A, the curved walls 250b are inclined inwards after the bending of the plate 200, without extending parallel to the X-direction, and narrow the passage opening 250. As described above, the plate 200 is not bent in the direction perpendicular to the side of Fig. 9A bent. After the plate was bent 200, the lines run in Fig. The flat walls shown in 9A are therefore parallel to the X direction.

[0037] The curved plate is then 200, as in Fig. As shown in Figure 9A, a die (not shown) is placed on a die. A punch 301 with a curved side surface is then moved parallel to the X-direction to shave the curved walls 250b. The punch 301 used for shaving is longer than the one shown in Figure 9A by the length corresponding to the amount of shaving required on both sides of the curved walls 250b. Fig. 8A shows the punch 300, which is used to produce the through-holes 250. As in Fig. As shown in Figure 9B, the punched sections 210 are removed from the second collector element 120 to form the curved walls 50b parallel to the X-direction. In this way, the opening walls of the inlet openings 50 in the second collector element 120 are parallel to the X-direction over their entire circumference. These operations produce the second collector element 120.

[0038] As in Fig. As shown in Figure 10, the inlet openings 50 in the second collector element 120 receive the heat transfer lines 20. The second collector element 120, which receives the heat transfer lines 20, is then heated in a (not shown) heating furnace. This melts the brazing alloy from the brazing alloy layer of the second collector element 120, and the heat transfer lines 20 are connected to the second collector element 120 by brazing. Effects

[0039] In the foregoing embodiment, the opening wall of each insertion opening 50 extends in the curved semicircular section 121 over its entire circumference along the associated heat transfer line 20, or more precisely along the direction in which the heat transfer line 20 is guided through it. As shown in Fig. As shown in Figure 10, the connection length L between the second collector element 120 and the semi-cylindrical sections 20b of the heat transfer line 20 is therefore greater than the plate thickness t of the second collector element 120. The greater connection length L can increase the connection strength between the second collector element 120 and the heat transfer line 20 and thus increase the compressive strength.

[0040] As in Fig. As shown in Figure 10, the distance between the opening wall of each insertion opening 50 and the outer surface of the corresponding heat transfer line 20 is constant over the connection length L. This allows a cooled and hardened brazing alloy to be uniformly distributed between the opening wall of each insertion opening 50 and the outer surface of the associated heat transfer line 20. This improves the quality of the brazing and increases the strength of the connection, thereby increasing its compressive strength.

[0041] As in Fig. As shown in Figure 10, the distance between the opening wall of each insertion opening 50 and the outer surface of the associated heat transfer line 20 is short over the connection length L, so that the amount of solder used can be reduced. This reduces the erosion that can result from excessive use of solder and thus improves the quality of the solder joint.

[0042] The longer punch 301 is used to recut the two ends of each insertion opening 50 in the U-shaped second collector element 120. Both ends of each insertion opening 50 can be recut in a single punching operation using the punch 301, thus simplifying the manufacturing process. The through-holes 250 are pre-formed in the plate 200, reducing the amount of material removed by recutting with the punch 301. Consequently, the second collector element 120, with its U-shaped cross-section, is less prone to deformation and can therefore be precisely fitted to the first collector element 110. Design 2

[0043] The following describes embodiment 2. As in Fig. As shown in Figure 11, a second collector element 320 has insertion openings 350, which correspond to the profile of the one shown in Fig. The two illustrated heat transfer lines 20 correspond. Each inlet opening 350 is a flat elongated hole. Each inlet opening 350 has a pair of flat walls 350a that correspond to the rectangular prismatic section 20a of the associated in Fig. 2 shown facing / opposite the heat transfer line 20, and a pair of curved walls 350b which face the semi-cylindrical sections 20b of the in Fig. 2 are facing / opposite the heat transfer line 20 shown.

[0044] As in Fig. As shown in Figure 12A, the flat walls 350a extend along the corresponding heat transfer line 20, which is received in the inlet opening 350. The flat walls 350a run parallel to the X-direction in which the heat transfer line 20 passes. As shown in Fig. As shown in Figure 12B, the curved walls 350b extend along the associated heat transfer line 20, which is received in the inlet opening 350. The curved walls 350b run parallel to the X-direction in which the heat transfer lines 20 are routed.

[0045] As in Fig. As shown in Figure 11, an outer surface 320a of the second collector element 320 has a cross-sectional surface 360 ​​along the edge of each insertion opening 350. As shown in Fig. 12A and Fig. As shown in Figure 12B, the cut surface 360 ​​connects the opening wall of each inlet opening 350 to the outer surface 320a of the second collector element 320. The opening wall of the inlet opening 350 comprises the flat walls 350a and the curved walls 350b. The cut surface 360 ​​is inclined to enlarge the inlet opening 350 towards the outer surface 320a of the second collector element 320.

[0046] The following describes a method for producing the cut surface 360 ​​in the second collector element 320. The connection recesses 120a and the through-openings 250 in the plate 200 for the second collector element 320 are formed in the same way as in the preceding embodiments, as shown in Fig. 8B is shown. Subsequently, the edge of each through-opening 250 is in a surface of the in Fig. The plate 200 shown in Figure 8B is machined with a tool having a slanted surface to be chamfered. The surface of the plate 200 faces the surface on which the connecting recesses 120a are formed. The plate 200 is then bent, and the surface with the chamfered edge of each through-hole 250 faces outwards. Finally, the punch 301, as shown in Figure 8B, is used to machine the plate 200. Fig. The process shown in Figure 9B is performed parallel to the X-direction to recut the curved walls 250b. Using the preceding processes, the cut surface 360 ​​at the edge of each insertion opening 350 can be formed as shown in the Fig. 12A and Fig. 12B is shown.

[0047] Although the edge of each insertion opening 350 is chamfered before bending the plate 200 in the preceding example, the edge can also be chamfered after bending the plate 200. In this case, the edge of each through opening 250 is chamfered after the plate 200 has been bent with the connecting recesses 120a and the through openings 250, and the edge of each through opening 250 is finally removed by recutting.

[0048] In embodiment 2, the cut surface 360 ​​is inclined to enlarge the insertion opening 350 towards the outer surface 320a of the second collector element 320. Thus, each heat transfer line 20 that comes into contact with the cut surface 360 ​​is displaced along the corresponding cut surface 360 ​​to be inserted through the insertion opening 350. In this way, each heat transfer line 20 can be easily inserted into the corresponding insertion opening 350, which facilitates assembly.

[0049] Additionally, the space between the cut surface 360 ​​and the heat transfer line 20 received in the insertion opening 350 can serve as a brazing trap to collect any solder that overflows from the connection section. This structure can prevent the solder from overflowing from the connection section between the second collector element 320 and the heat transfer line 20. embodiment 3

[0050] As in Fig. As shown in Figure 13A, in embodiment 3 a second collector element 420 comprises flanges 460 at both longitudinal ends of an insertion opening 450. The second collector element 420 differs from the second collector element 120 of embodiment 1, which does not have such flanges. The flanges 460 project into the interior of the second collector element 420.

[0051] A method for producing the second collector element 420 of embodiment 3 is now described. As in Fig. As shown in Figure 8B, the connecting recesses 120a and the through-openings 250 for the second collector element 420 are first formed in the plate 200, and the plate 200 is then formed as in Fig. 9A shows the bent shape. These processes are the same as those in embodiment 1. Subsequently, as shown in Fig. As shown in Figure 13B, punch 302 is moved in the X direction to burr the curved walls 250b at both ends of each passage opening 250. In this way, as shown in Fig. 13A shows curved walls 450b running parallel to the X direction, and the flanges 460 extending in the X direction project into the interior of the second collector element 420.

[0052] In embodiment 3, the connection length L1 at the connection between the second collector element 420 and the semi-cylindrical sections 20b of each heat transfer line 20 is greater than the plate thickness t of the second collector element 420, as shown in Fig. Figure 13A shows that, in addition to the connection length L1, a connection length L2 is provided, which corresponds to the longitudinal length of the flanges 460 at both ends of the insertion opening 450. This structure can increase the connection strength between the second collector element 420 and the heat transfer line 20, thus improving the pressure resistance.

[0053] The disclosure is not limited to the foregoing embodiments and may be amended or modified in various ways. In the foregoing embodiments, as described in Fig. Figure 8A shows the through-openings 250 formed before the plate 200 is bent, but the through-openings 250 can also be formed after the plate 200 has been bent. As shown in Fig. As shown in Figure 14A, each through-opening 250 can be formed by means of a punch 303, which presses the plate 200 with the connecting recesses 120a in several directions. In this state, without moving the plate 200, the punch 303 is rotated during each pressing operation to form the through-opening 250 in several steps. In another case, the U-shaped plate 200 is rotated and moved during each pressing operation without rotating the punch 303 to form the through-opening 250 in several steps. In this way, the Fig. The through-opening 250 shown in Figure 14B is formed in the U-shaped plate 200. The punch 301 is then inserted as shown in Figure 14B. Fig. 14B, shown, moved parallel to the X-direction to trim the curved walls 250b at both ends of each through-opening 250. This enables the production of the in Fig. 9B shown second collector element 120 including the curved walls 50b parallel to the X direction.

[0054] The in Fig. The die 303 shown in 14A for forming the through-holes 250 is narrower than the one in Fig. Figure 8A shows a punch 300 for forming the through-holes 250 in the flat plate 200. This reduces the deformation of the U-shaped bent plate 200.

[0055] Each heat transfer line 20 connected to the heat exchanger collectors 100 and 500 can have a cross-section other than a flat one. For example, a heat transfer line with a circular, square, or triangular cross-section can be connected to the heat exchanger collectors 100 and 500.

[0056] The second collector element 120 is formed from a coated material, including an aluminum plate covered with solder, and the heat transfer lines 20 are connected by means of the solder melted from the second collector element 120. However, the heat transfer lines 20 can be connected in any way. For example, the second collector element 120 and the heat transfer lines 20 can be soldered using a brazing paste or brazing wire.

[0057] The structure of the connecting section between the first collector element 110 and the second collector element 120 is an example, and the connecting section can have a different structure. For example, the two ends of the first collector element 110 and the two ends of the second collector element 120 can be butt-joined.

[0058] In the foregoing embodiments, the heat exchanger collector 100 and the heat exchanger collector 500, as a pair of tubes, have the same basic structure, but they may have different basic structures.

[0059] As above with reference to Fig. As described in 13A, the flanges 460 are formed by drawing them through so that they protrude into the interior of the second collector element 420, but alternatively the flanges can also protrude outwards from the second collector element 420.

[0060] The ends of each through-hole 250 can be recut parallel to the X-direction in a manner other than that described above, selected from known processing methods, and the cut surfaces 360 can be formed on the edges of each insertion opening 350 in a manner other than that described above, selected from known processing methods. For example, the ends of each through-hole 250 can be filed so that they run parallel to the X-direction. The cut surface 360 ​​can be formed by filing the edge of each insertion opening 350 or by cutting the corner. The insertion openings 50 can be produced by laser processing of the U-shaped plate 200. This forms the insertion openings, each defined by the opening wall extending along the heat transfer line 20 in the U-shaped plate 200.

[0061] In the embodiments described above, the insertion openings 50 are formed in the semicircular section 121 in the second collector element 120, which has a semicircular cross-section. In some embodiments, the insertion openings 50 may be formed in a section with a different cross-section. For example, the insertion openings 50 may be formed in an arc-shaped section in the second collector element 120 or in a projection with a rounded end.

[0062] In the embodiments described above, the components of the heat exchanger 1, such as the heat exchanger manifold 100 and the heat transfer lines 20, are made of aluminum. In some embodiments, the components can be made of another metal, such as stainless steel, steel, or copper.

[0063] The foregoing describes some exemplary embodiments for illustrative purposes. Although specific embodiments were presented in the preceding discussion, the person skilled in the art will recognize that changes in form and detail can be made without departing from the general idea and scope of the invention. Accordingly, the description and the drawings are to be understood in an illustrative rather than a limiting sense. This detailed description is therefore not to be understood in a limiting sense, and the scope of protection of the invention is defined only by the appended claims, together with the full range of equivalents to which these claims entitle.

[0064] This application claims the rights of Japanese patent application No. JP 2020 - 061 786 A, which was filed on March 31, 2020, and the entire disclosure of which is incorporated herein by reference. Reference symbol list 1 heat exchanger 20 Heat transfer line 20a rectangular prismatic section 20b semi-cylindrical section 20c Circulation opening 30 Radiation rib 30a Through opening 50 insertion opening 50a flat wall 50b curved wall 100 heat exchanger collectors 110 first collector element 110a Bypass opening 111 first pipe 111a Passage opening 111b Connecting pipe connector 112 pipe limiters 112a Connecting pipe insertion opening 113 Connecting section 120 second collector element 120a Connection return 121 semicircular section 122 flat section 130 connecting pipe 130a Through opening 140 cap 141 first lead 142 second lead 150 second pipe 200 plates 200a main area 210 punched section 221 semicircular section 250 Through opening 250a flat wall 250b curved wall 300, 301, 302, 303 stamps 320 second collector element 320a Outdoor area 350 insertion opening 350a flat wall 350b curved wall 360° cut surface 420 second collector element 450 insertion opening 450b curved wall 460 flange 500 heat exchanger collectors 510 first collector element 520 second collector element 540 cap 550 insertion opening QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] JP 4533374

[0004] JP 2020061786 A

[0064]

Claims

[1] Heat exchanger header, comprising: a first collector element comprising a first tube and a tube restrictor, wherein the first tube comprises a bypass flow path for a heat transfer medium to circulate through the bypass flow path, wherein the tube restrictor is part of a second tube comprising a main flow path for the heat transfer medium to circulate through the main flow path; and a second collector element connected to the tube restrictor, to limit the second pipe together with the pipe limiter, whereby the second collector element comprises a curved section with an insertion opening for receiving a heat transfer line, and the insertion opening has an opening wall which extends over the entire circumference of the opening wall along the heat transfer line accommodated in the insertion opening. [2] The heat exchanger header according to claim 1, wherein the opening wall of the introduction opening extends over the entire circumference parallel to a direction along which the heat transfer pipe is passed. [3] The heat exchanger header according to claim 1 or 2, wherein the insertion opening has a beveled edge on an outer surface of the second header element. [4] Heat exchanger collector according to one of claims 1 to 3, wherein the insertion opening is a slot whose longitudinal direction is parallel to a circumferential direction of the second tube, and the bent portion has flanges at both ends of the insertion opening in the longitudinal direction, which extend in a direction along which the heat transfer line is passed. [5] A heat exchanger header according to any one of claims 1 to 4, wherein the second header element has an inner surface connected to the tube restrictor, and the inner surface has a recess that receives an edge of the tube restrictor along the main flow path. [6] Heat exchanger, comprising: the heat exchanger header according to one of claims 1 to 5; the heat transfer line passing through the inlet opening and connected to the main flow path; and a fin attached to the heat transfer line. [7] Heat exchanger according to claim 6, wherein the heat transfer line passing through the inlet opening is connected to the heat exchanger collector, and a length of a connecting portion between the opening wall of the introduction opening and an outer surface of the heat transfer line along the heat transfer line is greater than a plate thickness of the second collector element at both ends of the introduction opening in the circumferential direction of the second tube. [8] The heat exchanger according to claim 6 or 7, wherein at both ends of the introduction opening in a circumferential direction of the second tube, a distance between the opening wall of the introduction opening and an outer surface of the heat transfer pipe is constant in a direction in which the heat transfer pipe extends. [9] A method for manufacturing a heat exchanger header, the method comprising: Forming an insertion opening for receiving a heat transfer line in a second collector element; Bending the second collector element with the insertion opening; machining a portion of an opening wall of the insertion opening that is not parallel to a direction in which the heat transfer line is passed through so that it becomes parallel to the direction in which the heat transfer line is passed through; and Connecting a first collector element to the second collector element having the machined opening wall to form a flow path for a heat transfer medium to circulate through the flow path. [10] A method for manufacturing a heat exchanger header, the method comprising: Bending a second collector element; Forming an insertion opening in the bent second collector element to accommodate a heat transfer line, in several steps; machining a portion of an opening wall of the insertion opening that is not parallel to a direction in which the heat transfer line is passed through so that it becomes parallel to the direction along which the heat transfer line is passed through; and Connecting a first collector element to the second collector element having the machined opening wall to form a flow path for a heat transfer medium to circulate through the flow path. [11] A method according to claim 9 or 10, wherein the machining of the opening wall comprises re-cutting the portion which is not parallel to the direction in which the heat transfer line is passed. [12] A method according to claim 9 or 10, wherein the machining of the opening wall comprises drawing through to form a flange in the direction in which the heat transfer line is passed through. [13] A method according to any one of claims 9 to 12, wherein the machining on the opening wall shapes the opening wall to extend over the entire circumference of the opening wall parallel to the direction in which the heat transfer line is passed. [14] Method according to one of claims 9 to 13, further comprising: Forming a recess on the second collector element in a longitudinal direction of the second collector element, wherein bending the second collector element places the recess on an inner surface of the bent second collector element, and connecting the first collector element to the second collector element comprises temporarily securing the first collector element to the second collector element by fitting an edge of the first collector element into the recess. [15] A method for producing a heat exchanger, the method comprising: the steps included in the method according to any one of claims 9 to 14; Attaching the heat transfer line through a through hole in a fin; Attaching the heat transfer line through the insertion opening in the second collector element and connecting the heat transfer line to the flow path so that the heat transfer medium circulates through the flow path; and Heating the second header element, the heat transfer line, and the fin assembled to interconnect the second header element, the heat transfer line, and the fin. [16] The method according to claim 15, wherein a length of a connecting portion between the opening wall of the introduction opening and an outer surface of the heat transfer line along the heat transfer line is larger than a plate thickness of the second header member at both ends of the introduction opening in a circumferential direction of the second header member. [17] The method according to claim 15 or 16, wherein at both ends of the introduction opening in a circumferential direction of the second collector member, a distance between the opening wall of the introduction opening and an outer surface of the heat transfer line is constant in a direction along which the heat transfer line extends.