JP2005155967A - Heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat exchanger with no dispersion of dimensional accuracy, and favorable assemblability of respective heat exchanger bodies. <P>SOLUTION: A plurality of heat exchanger bodies comprising a core part with alternately juxtaposed tubes and fins, and upper header pipes 9 and 13 communicated with both ends of the tubes of the core part are arranged in the heat exchanger, and the header pipes 9 and 13 of the heat exchanger bodies are connected via a tubular member 31. It is comprised by prismatically forming end parts 40 and 40 of the tubular member 31, and providing a cross sectionally rectangular attachment part 44 engaging with the end part 40 of the tubular member 31 on a sub tank case 41 of the upper header pipes 9 and 13. By fitting the end part 40 of the tubular member 31 in the attachment part 44, the upper header pipes 9 and 13 of the heat exchanger bodies are connected by the tubular member 31. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a heat exchanger, and more particularly to a heat exchanger in which a plurality of heat exchanger bodies formed in a planar shape are connected to each other via a tubular member.

  Conventionally, flat heat exchangers such as radiators and condensers have been the mainstream. The radiator is mounted on an automobile and cools the engine, and the condenser cools the gas refrigerant of the air conditioner with outside air (see, for example, Patent Document 1). On the other hand, in recent years, so-called polyhedral heat exchangers having a substantially L-shape or U-shape in plan view have been developed from the viewpoint of labor saving and low noise.

  FIG. 8 is a perspective view showing the heat exchanger 101 formed in a substantially U shape in plan view, and FIG. 9 is an exploded perspective view of the heat exchanger 101 in FIG.

  The heat exchanger 101 includes a first heat exchanger main body 103 disposed in the front part of the vehicle, a second heat exchanger main body 105 disposed on the left and right sides of the first heat exchanger main body 103, and a first heat exchanger main body 103. 3 is formed in a substantially U shape. In addition, the heat exchanger 101 has a larger front surface area of the core portion 109 than the planar heat exchanger, and the cooling air passage area for heat exchange is increased, so that the cooling performance is improved. effective.

Upper and lower header pipes 103a, 105a, 107a and lower header pipes 103b, 105b, 107b are respectively arranged above and below each heat exchanger body 103, 105, 107. Are connected via a connecting member. These connecting members include an engaging member 103c provided on the first heat exchanger main body 103 side, and engaged members 105c and 107c provided on the second and third heat exchanger main bodies 105 and 107 side. The heat exchanger bodies are connected to each other by coupling the engaging member 103c to the engaged members 105c and 107c.
JP 2002-107094 A

  However, in the conventional heat exchanger, since the heat exchanger main bodies are coupled to each other through a connecting member composed of the engaging member 103c and the engaged members 105c and 107c, the sealing performance between the header pipes is However, this is not always good, and there is a possibility that the heat exchange medium leaks at the connecting portion.

  In addition, when heat distortion occurs in the heat exchanger main body due to heating after brazing, the dimensional accuracy of each heat exchanger main body varies, so the engaging member 103c is replaced with the engaged members 105c and 107c. There is a possibility that the assembling property at the time of assembling may be lowered.

  Therefore, an object of the present invention is to provide a heat exchanger in which the sealing performance at the connecting portion between the header pipes is good and the assembling property of the connecting portion is good.

  In order to achieve the above object, a heat exchanger according to claim 1 includes a core portion in which tubes and fins in which a heat exchange medium flows are alternately arranged and communicated with both ends of the tube of the core portion. A plurality of heat exchanger bodies, each of which includes a header pipe portion, and a heat exchanger body in which the header pipe portions of the heat exchanger bodies are connected to each other via a tubular member. An attachment portion having a substantially rectangular cross section that engages with the end portion of the tubular member is provided on the header pipe portion side while being formed in a cylindrical shape, and the end portion of the tubular member is provided on the attachment portion of the heat exchanger body. The header pipe portions of the heat exchanger main body are connected to each other through a tubular member.

  A heat exchanger according to a second aspect is the heat exchanger according to the first aspect, wherein a main body portion located between both end portions of the tubular member is formed in a cylindrical shape. .

  A heat exchanger according to claim 3 is the heat exchanger according to claim 1 or 2, wherein two heat exchanger main bodies are provided and arranged in an L shape in a plan view. The header pipe parts of the heat exchanger main body are connected to each other through a bent tubular member.

  A heat exchanger according to claim 4 is the heat exchanger according to claim 1 or 2, wherein three heat exchanger bodies are provided and arranged in a U-shape in plan view. The header pipe parts of the heat exchanger main body are connected to each other through a bent tubular member.

  According to the heat exchanger according to claim 1, the end of the tubular member is formed in a rectangular tube shape, and the attachment having a substantially rectangular cross section engaging the end of the tubular member on the header pipe portion side Since the portion is provided, the end portion of the tubular member and the header pipe portion abut on each other in a planar manner, and the brazing accuracy is improved. In addition, regarding the positioning of the tubular member in the circumferential direction, because the flat surface of the end portion of the rectangular tube abuts the header pipe, the vertical and horizontal positioning can be reliably performed, and the tubular member does not rotate, The vibration resistance and durability of the heat exchanger are improved. Furthermore, since the header pipes are connected to each other without using a block-shaped connecting member as in the prior art, the sealing performance of the connecting portion is improved, and there is no possibility that the heat exchange medium leaks from the connecting portion.

  According to the heat exchanger described in claim 2, since the main body located between both ends of the tubular member is formed in a cylindrical shape, a so-called polyhedral structure having a substantially L-shape or U-shape in plan view. When producing this heat exchanger, the tubular member can be reliably bent and deformed at a predetermined angle.

  According to the heat exchanger described in claim 3, since the two heat exchanger bodies are arranged in an L shape in plan view and connected via a tubular member, the heat exchanger having an L-shaped polyhedral structure is provided. Can be created efficiently.

  According to the heat exchanger described in claim 4, since the three heat exchanger bodies are arranged in a U shape in plan view and connected via a tubular member, a heat exchanger having a U-shaped polyhedral structure is provided. Can be created efficiently.

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

  FIG. 1 is a perspective view showing a heat exchanger 1 according to an embodiment of the present invention.

  The heat exchanger 1 includes a first heat exchanger body 3 disposed along the vehicle width direction on the vehicle front side, and a second heat exchange disposed on the left side of the first heat exchanger body 3. It consists of a main body 5 and a third heat exchanger main body 7 arranged on the right side of the first heat exchanger main body 3.

  The first heat exchanger body 3 includes an upper header pipe 9 disposed at an upper portion, a lower header pipe 15 disposed at a lower portion, and a plurality of tubes that vertically connect the upper header pipe 9 and the lower header pipe 15. The plurality of tubes 19 are brazed via fins 21 formed in a wave shape. Moreover, the core part 22 is comprised by these tubes 19 and the fins 21. FIG. Note that a connection pipe 23 is attached to the center of the upper header pipe 9 of the first heat exchanger body 3 so as to extend forward of the vehicle.

  2 is an enlarged perspective view showing the vicinity of the upper header pipe 9 of FIG. 1, and FIG. 3 is a plan view of FIG. As shown in these drawings, the upper header pipe 9 includes a diversion sub-tank 25 disposed on the upper side and a main tank 27 disposed on the lower side of the diversion sub-tank 25. Further, the end of the main tank 27 is sealed by a side plate 29, and the diversion sub-tanks 25 are connected to each other via a tubular member 31 bent substantially at a right angle as shown in FIG.

  Specifically, as shown in FIG. 4, which is an exploded perspective view of FIG. 2, the main tank 27 is configured by fitting a main tank case 35 from the upper side to the inner side of the lower main tank plate 33. The opening end edges of the main tank plate 33 and the main tank case 35 are sealed by the side plate 29 as described above. A plurality of insertion holes 37 are formed in the bottom surface of the main tank plate 33 and communicate with the tube 19 (see FIG. 1).

  In addition, a plurality of flow holes 39 having a substantially rectangular shape in plan view are provided on the upper surface of the main tank case 35, and the cross-section is substantially U-shaped from the upper surface of the main tank case 35 so as to cover the flow holes 39. The formed sub tank case 41 is attached, and the attachment portion 44 provided at the end of the sub tank case 41 is connected via the tubular member 31.

  Both end portions 40, 40 of the tubular member 31 are formed in a rectangular tube shape having a substantially rectangular cross section, and are formed in a shape that fits inside the sub tank case 41. Moreover, the main-body part 42 located between the both ends 40 and 40 of the tubular member 31 is formed in the cylindrical shape with a circular cross section. Accordingly, the heat exchange medium in the diversion sub-tank 25 flows into the main tank 27 through the flow hole 39 formed in the main tank case 35 and enters the tube 19 through the insertion hole 37 formed in the main tank plate 33. Be sent.

  Further, as shown in FIG. 5, the end portion of the tubular member 31 is joined to the upper surface of the main tank case 35, and the attachment portion 44 of the sub tank case 41 is joined to the end portion. Yes. As described above, the end portion 40 of the tubular member 31 is formed in a rectangular shape in cross section, and is composed of the upper surface 47, the bottom surface 49, and the four side surfaces 51 and 53. On the other hand, the attachment portion 44 of the sub tank case 41 is also formed in a substantially U-shaped cross section from the upper surface 55 and both side surfaces 57 and 59.

  A procedure for producing the heat exchanger 1 having the above-described configuration will be briefly described.

  First, three heat exchanger bodies formed in a planar shape, that is, a first heat exchanger body 3, a second heat exchanger body 5, and a third heat exchanger body 7 (see FIG. 1) are mutually connected. They are arranged on the same plane with a gap.

  Next, as shown in FIG. 4, the end portions of the upper header pipe 9 on the first heat exchanger body side and the upper header pipe 13 on the third heat exchanger body side are connected to each other via a cylindrical tubular member 31. As a result, the planar heat exchanger 1 is assembled. 4 is an exploded perspective view of the completed heat exchanger 1, and the tubular member 31 is shown in a bent state. However, at the time of assembling the heat exchanger body, the tubular member 31 is in the longitudinal direction. It is formed in a straight line.

  And after brazing the said planar heat exchanger 1, it accommodates in the inside of the furnace 43 shown in FIG. 6, and the heating process of the heat exchanger 1 is performed. As shown in FIG. 6, since the heat exchanger 1 after brazing is formed in a substantially straight line shape in plan view, a large number of heat exchangers 1 can be accommodated in the furnace 43 if they are stacked vertically. Can do. For example, in the case of FIG. 6, eight heat exchangers 1 can be accommodated.

  After that, the tubular member 31 of the heat exchanger 1 that has undergone the heating step is bent.

  FIG. 7 is a schematic view showing a state where the tubular member 31 in the heat exchanger 1 according to the embodiment of the present invention is bent. As shown in this figure, the bending jig 45 is formed in a columnar shape having a circular cross section, the side surface of the bending jig 45 is pressed against the side portion of the tubular member 31, and the tubular member 31 is bent in this state. By bending along the side surface of the jig 45, the tubular member 31 can be bent and deformed to a predetermined angle.

  The flow of the heat exchange medium in the heat exchanger 1 will be described.

  As shown in FIG. 1, the heat exchange medium M that has flowed into the upper header pipe 9 of the first heat exchanger body 3 from the connection pipe 23 circulates in the upper header pipe 9 on the left and right sides, and flows through the tubes 19. Flows to the lower header pipe 15 below. Further, after flowing into the upper header pipes 11 and 13 of the left and right second and third heat exchanger bodies 5 and 7 through the tubular member 31, they flow into the lower header pipe 17 through the tube 19.

  According to the heat exchanger 1 having the above-described configuration, as described with reference to FIG. 5, the end portion 40 of the tubular member 31 is formed in a rectangular tube shape, and the attachment portion 44 of the header pipe is formed in a substantially rectangular shape in cross section. The side plate for closing the edge of the sub tank case 41 is not necessary.

  The present invention is not limited to the above-described embodiments, and various changes and modifications can be made based on the technical idea of the present invention.

  For example, as shown in FIG. 4, the flow hole 39 of the main tank case 35 is formed in a substantially rectangular shape in plan view, but the flow hole may be circular or elliptical.

It is a perspective view which shows the heat exchanger by embodiment of this invention. It is a perspective view which expands and shows the A section of FIG. FIG. 3 is a plan view of FIG. 2. FIG. 3 is an exploded perspective view showing an upper header pipe of FIG. 2. It is an expanded sectional view by the BB line of FIG. It is the schematic which shows the state which accommodated the heat exchanger by embodiment of this invention in the furnace. It is the schematic which shows the state which has bent the tubular member in the heat exchanger by embodiment of this invention. It is a perspective view which shows the conventional heat exchanger. It is a disassembled perspective view of the heat exchanger of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Heat exchanger 3 ... 1st heat exchanger main body (heat exchanger main body)
5 ... 2nd heat exchanger body (heat exchanger body)
7 ... Third heat exchanger body (heat exchanger body)
9-13 ... Upper header pipe (header pipe section)
15, 17 ... Lower header pipe (header pipe section)
DESCRIPTION OF SYMBOLS 19 ... Tube 21 ... Fin 31 ... Tubular member 40 ... End part 42 ... Main-body part 44 ... Mounting part

Claims (4)

A core portion (22) in which tubes (19) and fins (21) through which a heat exchange medium (M) flows are alternately arranged, and a header communicating with both ends of the tube (19) of the core portion (22) A plurality of heat exchanger bodies (3, 5, 7) composed of pipe portions (9, 11, 13, 15, 17) are arranged, and header pipe portions (3, 5, 7) of these heat exchanger bodies (3, 5, 7) 9, 11, 13, 15, 17) connected via a tubular member (31),
The end (40) of the tubular member (31) is formed in a rectangular tube shape, while the end (40) of the tubular member (31) is formed on the header pipe portion (9, 11, 13, 15, 17) side. ) Is provided with a mounting portion (44) having a substantially rectangular cross section.
By fitting the end portions (40) of the tubular member (31) into these attachment portions (44), the header pipe portions (9, 11, 13, 15) of the heat exchanger body (3, 5, 7) are connected. , 17) are connected via a tubular member (31).   The heat exchanger according to claim 1, wherein the main body (42) located between both ends (40, 40) of the tubular member (31) is formed in a cylindrical shape.   A tubular member (31) in which the two heat exchanger main bodies are provided and the header pipe portions (9, 11, 13, 15, 17) of the heat exchanger main bodies are bent in a state where these heat exchanger main bodies are arranged in an L shape in plan view. The heat exchanger according to claim 1 or 2, wherein the heat exchanger is connected via a).   In the state where three heat exchanger bodies (3, 5, 7) are provided and arranged in a U shape in plan view, the header pipe portions (9, 11) of the heat exchanger bodies (3, 5, 7) are arranged. The heat exchanger according to claim 1, wherein the heat exchanger is connected through a bent tubular member (31).

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