JP2006125708A - Connection structure for heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce installation space, to reduce costs, and to improve operation efficiency. <P>SOLUTION: The connection structure for the heat exchanger is for serially connecting a plurality of heat exchangers 21 and 22 provided with tanks 28, 29, 30 and 31 in end parts of cores 25 and 26. It is characterized by that it is composed such that a communication hole 42 is bored in an end face of each tank 28, 29, 30 and 31, a packing 43 is airtightly provided along a circumferential rim part of the communication hole 42, the packings 43 are connected by closely contacting them to each other, and the tanks 28, 29, 30, and 31 are communicated with each other via the communication holes 42. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a heat exchanger connection structure for connecting in parallel a plurality of heat exchangers each having a tank provided at an end portion of a core including tubes and fins.

  In the field of using large heat exchangers, such as construction machines, there are cases where a manufacturing request for a large heat exchanger that requires a large amount of heat radiation that exceeds the maximum size that can be manufactured alone may be received. However, since many such production requests cannot be expected in quantity, every time we receive a request, we make capital investments in core assembly machines, press parts, etc., and manufacture heat exchangers with the required heat dissipation. It is uneconomical. Therefore, usually, the heat exchanger of the size which can be manufactured with existing facilities is connected by connecting in parallel.

  FIG. 5 is a conventional example showing a connection structure of such a heat exchanger, and this connection structure is provided at both ends of the cores 3 and 4 of the two first and second heat exchangers 1 and 2, respectively. The provided first and second upper tanks 5, 6 and the first and second lower tanks 7, 8 are connected by U-shaped molding hoses 9, 10, respectively, to connect the two heat exchangers 1, 2. is there.

  In this case, the cooling water flowing into the first upper tank 5 from the inlet 11 flows into the second upper tank 6 through the molding hose 9, and passes through the fins 14 between the tubes 12 in the cores 3 and 4, respectively. After being cooled by air, it flows out from the outlet 14 through the first lower tank 7, the forming hose 10, and the second lower tank 8. (Note that the applicant did not know prior art documents related to the present invention because he invented based on the publicly known / public prior art.)

  However, in the connection structure of the conventional heat exchanger described above, the molded hoses 9 and 10 are used to connect the heat exchangers 1 and 2, so the front side or the rear side of the heat exchangers 1 and 2. A space for installing the molded hoses 9, 10 is required. Therefore, there is a problem that it is difficult to install in a narrow space such as an engine room of a vehicle.

  In addition, there is a problem in that the number of parts for connecting the heat exchangers 1 and 2 such as the molded hoses 9 and 10 increases, and these parts increase the manufacturing cost.

  Further, since the passage resistance of the fluid is increased in the molded hoses 9 and 10, there is a problem that the fluid conveyance power is increased and it is difficult to improve the operation efficiency.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a heat exchanger connection structure that can reduce installation space, reduce costs, and improve operating efficiency. .

  The present invention relates to a heat exchanger connecting structure for connecting in parallel a plurality of heat exchangers each having a tank at an end of a core, and a communication hole is formed in an end surface of each tank, and the communication Packing is provided in an airtight manner along the peripheral edge of the hole, the packing is connected by bringing the packings into close contact with each other, and the tanks are communicated with each other through the communication hole. Features.

  Preferably, each of the tanks includes a tank body having openings at both ends, and a cover plate that closes the openings of the tank body, and the communication holes and packings are provided on the cover plate, The outer peripheral part of the said cover plate protrudes outside from the said tank main body, and it is good to be comprised so that it can connect by fastening the outer peripheral parts of each said cover plate with a fixing tool.

  Moreover, the said packing may be provided with the latching groove part which can be latched in the peripheral part of the said communicating hole, and the contact part which can contact | adhere to the packing of the other party heat exchanger to connect.

  Furthermore, a collar made of a hard material may be provided along the packing.

  According to the present invention, there is no need for a space for installing parts for communicating between the tanks around the heat exchanger, and the space can be saved. Therefore, the heat exchanger is installed in a narrow space such as an engine room of a vehicle. Can be easily installed.

  Further, since the tanks are connected via packing, the number of parts and man-hours can be reduced, and the manufacturing cost can be reduced.

  Furthermore, the tanks are communicated with each other through the communication holes, and the fluid passage resistance can be kept low, so that the fluid conveyance power can be reduced and the operation efficiency can be improved. Various excellent effects can be obtained.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Here, FIG. 1 is a front view showing the connection structure of the heat exchanger according to the present embodiment, FIG. 2 is a cross-sectional view showing a connection portion of the connection structure of the heat exchanger, and FIG. 3 shows the packing in the present embodiment. FIG. 4 is a cross-sectional view showing a collar in the present embodiment. In the following description, the case where the present invention is applied to an aluminum radiator for construction machinery will be described as an example.

  In the present embodiment, the first heat exchanger 21 and the second heat exchanger 22 can be connected in parallel, and a plurality of the first heat exchanger 21 and the second heat exchanger 22 are provided in parallel. A first core 25 and a second core 26 in which fins 24 are interposed between the formed tubes 23; a core support 27 fixed to both sides of the first core 25 and the second core 26; The first upper tank 28, the second upper tank 29, the first lower tank 30, and the second lower tank 31 provided at both ends of the second core 26 are mainly configured.

  The first and second upper tanks 28, 29 and the first and second lower tanks 30, 31 are tubular bodies that are fitted to the header plate 32 connected to both ends of the tube 23 and the header plate 32, respectively. The tank body 33 has a long and narrow shape, and the cover plates 35 and 36 are capable of closing the openings 34 at both ends of the tank body 33.

  The header plate 31 has a shape in which both side edges of the flat plate portion 37 are bent toward the tank body 33, and a plurality of slit-like tube connection holes (not shown) are formed in the flat plate portion 37 by burring. The end portions of the tubes 23 can be fitted into these tube connection holes. Further, at both ends of the tank body 33, lid plate mounting holes 38 are formed so as to be parallel to the connection holes, and the lid plates 35 and 36 can be fitted into the lid plate mounting holes 38. It has become.

  Out of the cover plates 35 and 36, the outer peripheral portion 39 of the cover plate 35 on the heat exchanger side to be connected protrudes outward from the tank body 33 in a bowl shape, and a fixing tool mounting hole ( (Not shown) is perforated. And while inserting fixtures, such as a volt | bolt 40, into each fixture attachment hole of the 1st and 2nd heat exchangers 21 and 22 connected, elastic materials, such as a synthetic rubber 41, are interposed between each outer peripheral part 39. By doing so, each outer peripheral part 39 can be fastened now reliably. The lid plate 35 is provided with a circular communication hole 42, and the communication hole 42 is provided with a rubber packing 43 along the peripheral edge thereof.

  The packing 43 has an annular shape, and, as best shown in FIG. 3, a hooking groove 44 formed on one outer peripheral end and an abutment formed on the other outer peripheral end. And a collar mounting groove 46 formed between the latching groove portion 44 and the contact portion 45. A guide portion 47 is formed to be inclined at the front end side from the latching groove portion 44, and a projecting portion 48 having a semicircular cross-sectional shape is formed along the latching groove portion 44 at the center side from the latching groove portion 44. Has been.

  A collar 49 is fitted in the collar mounting groove 46 of the packing 43, and the collar 49 is made of a hard material such as metal and has a flat cylindrical shape as best shown in FIG. The inner peripheral both ends are chamfered. Thus, the strength of the packing 43 can be increased by attaching the collar 49 made of a hard material to the packing 43.

  Next, a procedure for manufacturing the aluminum radiator according to the present embodiment will be described.

  First, the both ends of the tube 23 are fitted into the tube connection holes of the header plate 32, the fins 24 are interposed between the tubes 23, the first core 25 is assembled, and the cores are formed on both sides of the first core 25. A support 27 is attached. Next, the tank main body 33 is fitted to the header plate 32, and the lid plates 35 and 36 are fitted to the lid plate mounting holes 38 and assembled to the tank main body 33 to assemble the first heat exchanger 21. And the 1st heat exchanger 21 assembled in this way is integrally brazed in a joining location in a furnace, and the 1st heat exchanger 21 is manufactured. Also, the second heat exchanger 22 is manufactured in the same procedure as that for the first heat exchanger 21.

  Next, in the first heat exchanger 21 and the second heat exchanger 22 manufactured as described above, the latching groove 44 of the packing 43 is latched at the peripheral edge of the communication hole 42 formed in the cover plate 35. The packing 43 is attached to the lid plate 35. At this time, since the guide portion 47 is formed on the packing 43 so as to be inclined, the mounting work of the packing 43 on the cover plate 35 can be performed easily and smoothly. Further, at this time, since the protruding portion 48 of the packing 43 comes into contact with the outer surface of the lid plate 35, the packing 43 is airtightly attached to the lid plate 35, and there is a possibility that the cooling water in the tank leaks from the mounting location of the packing 43 Absent.

  Next, the contact portions 45 of the packings 43 attached to the cover plates 35 of the first heat exchanger 21 and the second heat exchanger 22 are brought into close contact with each other, and the outer peripheral portions 39 of the cover plate 35 are connected to each other. The bolts 40 are inserted into the fixture mounting holes, and the synthetic rubber 41 is interposed between the outer peripheral portions 39 to fasten the outer peripheral portions 39 to each other. Thereby, the 1st heat exchanger 21 and the 2nd heat exchanger 22 are connected reliably, the 1st upper tank 28 and the 2nd upper tank 29, and the 1st lower tank 30 and the 2nd lower tank 31 are each communicating holes, respectively. The communication state is established via 42.

  In such a configuration, the cooling water that has flowed into the first upper tank 28 from the cooling water inlet 50 installed in the first upper tank 28 flows into the second upper tank 29 through the communication hole 42, and each tube After flowing through the inside 23, it flows out from the cooling water discharge port 51 through the first lower tank 30, the communication hole 42, and the second lower tank 31. During this time, the cooling water is cooled to a desired state by exchanging heat with the cooling air passing through the fins 24 between the tubes 23 in the first core 25 and the second core 26.

  In addition, the shape of the packing 43 in the above-described embodiment is merely an example, and is not intended to be limited to this, and various changes can be made.

  Further, the mounting position of the collar 49 with respect to the packing 43 may not be the outer peripheral side of the packing 43 as described above, but may be the inner peripheral side thereof. Further, it is not always necessary to attach the collar 49 to the packing 43. In this case, it goes without saying that the collar mounting groove 46 need not be formed in the packing 43.

  Furthermore, in the above-described embodiment, the case where the present invention is applied to an aluminum radiator for construction machinery has been described. However, this is merely an example, and the present invention can be used for heat exchange of other applications or other materials. It can also be applied to vessels.

It is a front view which shows the connection structure of the heat exchanger which concerns on embodiment of this invention. It is sectional drawing which shows the connection part of the connection structure of the heat exchanger which concerns on embodiment of this invention. It is sectional drawing which shows the packing in the connection structure of the heat exchanger which concerns on embodiment of this invention. It is sectional drawing which shows the color | collar in the connection structure of the heat exchanger which concerns on embodiment of this invention. It is a perspective view which shows a prior art example.

Explanation of symbols

21 1st heat exchanger 22 2nd heat exchanger 25 1st core 26 2nd core 28 1st upper tank 29 2nd upper tank 30 1st lower tank 31 2nd lower tank 33 Tank main body 34 Opening part 35 Cover plate 36 Cover plate 39 Outer circumference Part 40 Bolt 42 Communication hole 43 Packing 44 Retaining groove part 45 Contact part 49 Collar

Claims (4)

A heat exchanger connection structure for connecting in parallel a plurality of heat exchangers each having a tank at an end of a core,
A communication hole is formed in an end surface of each tank, and a packing is provided in an airtight manner along a peripheral edge portion of the communication hole. The packing is connected by bringing the packings into close contact with each other. A connection structure for a heat exchanger, wherein the tanks are configured to communicate with each other. Each tank includes a tank body having openings at both ends, and a cover plate that closes the opening of the tank body, the communication hole and packing are provided in the cover plate, and the outer periphery of the cover plate The heat exchanger connection structure according to claim 1, wherein the portion protrudes outward from the tank main body and can be connected by fastening outer peripheral portions of the lid plates with a fixture. The said packing is provided with the latching groove part which can be latched to the peripheral part of the said communicating hole, and the contact part which can contact | adhere to the packing of the heat exchanger of the other party to connect. Connection structure of heat exchanger. The connection structure for a heat exchanger according to claim 3, wherein a collar made of a hard material is provided along the packing.

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