JP2005265347A - Heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat exchanger capable of firmly connecting and fixing between both tanks, preventing cracking of connection parts of the tanks and both end parts of a heat radiation tube, applying a reinforcement member without disturbing the flow of the outside air, and preventing the impairing of the heat exchanging efficiency, and the generation of noise and vibration. <P>SOLUTION: The plurality of flat heat radiation tubes 12 are arranged in parallel with each other, one end part of each heat radiation tube 12 is connected to an inlet-side tank 13, and the other end part is connected to an outlet side tank 14. The reinforcement member 23 is hung and fixed between side end parts of the inlet-side tank 13 and the outlet-side tank 14 at a position outside of a flowing area of the outside air flow supplied in heat exchanging. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a heat exchanger such as an intercooler mounted on a turbocharger vehicle, for example.

  Generally, in a heat exchanger such as this type of intercooler, a plurality of flat heat dissipating tubes are juxtaposed, and one end of each heat dissipating tube is connected and fixed to the inner plate of the inlet side tank by brazing or the like. The other end is connected and fixed to the inner plate of the outlet side tank by brazing or the like. Then, after fluid such as air to be heat exchanged is led from the inlet side tank to each heat radiating tube and exchanged heat with the outside air, it is distributed from the outlet side tank to a required location such as an engine cylinder. Yes.

  However, such a heat exchanger such as an intercooler is usually mounted on the upper part of the engine via a bracket or the like in an engine room of a vehicle such as an automobile. For this reason, there has been a problem that vibrations generated during operation of the engine are directly transmitted to the heat exchanger, and cracks are likely to occur at the brazed portions between both ends of the heat radiating tube and the inner plates of both tanks. In particular, since the vibration is intense in a diesel engine, such a problem has been noticeable.

In order to cope with such a problem, for example, a heat exchanger having a reinforcing structure as disclosed in Patent Document 1 has been proposed. That is, in this conventional configuration, a pair of reinforcing bars are installed and fixed between the front and rear surfaces of the intermediate portion in the longitudinal direction of the inlet side tank and the outlet side tank so as to be positioned at the center portion in the direction in which the heat radiating tubes are juxtaposed. Has been. The two reinforcing tanks connect the two tanks, and as a result, the heat radiation tube is prevented from being deformed, and cracks are prevented from occurring at the brazed portions between both ends of the heat radiation tubes and the inner plates of the two tanks. It is like that.
JP-A-9-126683

  However, in this conventional heat exchanger, a pair of reinforcing bars are disposed on both front and rear surfaces of the central portion in the direction of juxtaposition of the heat dissipating tubes, and are located with the heat dissipating tube interposed therebetween. It is located on the upstream side and downstream side of the external airflow passing through the periphery of the heat radiating tube in the vicinity of the heat radiating tube. Therefore, these reinforcing bars become an obstacle to the flow of cooling outside air that passes between the plurality of heat radiating tubes, reducing the efficiency of heat exchange, and in some cases, the reinforcing bars interfere with the flow of outside air. There was a problem of generating vibration and noise.

  The present invention has been made paying attention to such problems existing in the prior art. Its purpose is to firmly bond and fix both tanks, and to prevent cracks and the like from occurring at the connecting portion between these tanks and both ends of the heat radiating tube. An object of the present invention is to provide a heat exchanger that can prevent a decrease in heat exchange efficiency and generation of noise and vibration without causing a hindrance to the flow of outside air.

  In order to achieve the above object, the invention described in claim 1 is provided with a plurality of flat heat radiation tubes arranged in parallel, one end of each of the heat radiation tubes being an inlet side tank, and the other end being an outlet. In the heat exchanger that is connected to each side tank, heat exchanged from the inlet side tank to each heat radiating tube and exchanges heat with the outside air, and then delivered from the outlet side tank to the required location. The reinforcing member is constructed and fixed between the side end portions of the inlet side tank and the outlet side tank at a position deviated from the flow area of the external airflow used for replacement.

  The invention according to claim 2 is characterized in that, in the invention according to claim 1, the inlet side tank and the outlet side tank have boss portions, and the reinforcing member is installed and fixed between the boss portions. To do.

  The invention according to claim 3 is the invention according to claim 2, wherein the reinforcing member is made of a metal plate, and the metal plate is provided with reinforcing means for increasing the second moment of section. And

The invention according to claim 4 is the invention according to claim 3, wherein the metal plate is arranged so that the metal plate is parallel to the heat radiating tube.
The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the invention is used as an intercooler of an engine having a turbocharger.

(Function)
In this invention, it is possible to firmly connect and fix the inlet tank and the outlet side tank by the reinforcing member. Therefore, it is possible to prevent a crack or the like from being generated at the connecting portion between both tanks and both end portions of the heat radiating tube due to vibration generated during engine operation. In addition, since the reinforcing member is located at a position outside the flow area of the external airflow, there is no possibility that the reinforcing member becomes an obstacle to the flow of the external air passing between the heat radiating tubes. Therefore, it can suppress that a reinforcement member interferes with external airflow, causes the fall of heat exchange efficiency, or generate | occur | produces a noise and a vibration.

  Further, if the reinforcing member is provided with reinforcing means for increasing the moment of inertia of the cross section, it is not necessary to use a metal plate having a large plate thickness or a wide metal plate as the reinforcing member. Accordingly, it is possible to achieve weight reduction and a sufficient reinforcing effect.

  In addition, if the plate thickness direction of the reinforcing member is parallel to the plate thickness direction of the heat radiating tube, the overall size can be avoided and it can be mounted without problems in a narrow space in the engine room. Become.

  As described above, according to the present invention, the two tanks can be firmly coupled and fixed, and cracks and the like can be prevented from being generated at the connecting portions between these tanks and both ends of the heat radiating tube. In addition, there is no possibility that the reinforcing member becomes an obstacle to the flow of outside air, and it is possible to suppress a decrease in heat exchange efficiency and generation of noise and vibration.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 3, the heat exchanger 11 of this embodiment includes a plurality of flat heat radiation tubes 12 arranged in parallel in the front-rear direction at predetermined intervals, and a group of these heat radiation tubes 12. The inlet side tank 13 is connected and fixed to one end, and the outlet side tank 14 is connected and fixed to the other end of the heat radiation tube 12 group. Here, the external airflow used for heat exchange flows in a direction indicated by an arrow P in FIG.

  As shown in FIG. 4, the inlet side tank 13 includes an elongated box-shaped tank body 15 formed so as to open toward the inside by an aluminum die-cast or injection-molded synthetic resin, and an opening of the tank body 15. It is comprised from the inner side board 17 which consists of aluminum die-casting fixed by crimping to the edge via the seal ring 16. FIG. An inlet 15 a for introducing a fluid such as air is formed inside the tank body 15.

  The outlet side tank 14 has an elongated box-shaped tank main body 18 formed so as to open inward with an aluminum die-cast or injection-molded synthetic resin, and a seal ring 19 at the opening edge of the tank main body 18. It is comprised from the inner side board 20 which consists of aluminum die-casting fixed by crimping via. On the outside of the tank body 18, an outlet 18 a for leading fluid such as air from the inside is formed.

  A plurality of insertion holes 17a are formed at predetermined intervals in the inner plate 17 of the inlet side tank 13, and one end portion of each heat radiating tube 12 is inserted into the insertion holes 17a and fixed by brazing. Has been. Similarly, a plurality of insertion holes 20a are formed at predetermined intervals in the inner plate 20 of the outlet side tank 14, and the other end portions of the respective heat radiation tubes 12 are inserted into the insertion holes 20a. It is connected and fixed by.

  As shown in FIGS. 1 to 4, aluminum is provided between the front side end (the right side in FIG. 1) and the rear side end (the left side in FIG. 1) between the inlet side tank 13 and the outlet side tank 14. A connecting plate 21 made of a metal plate or the like is installed and fixed by brazing both end portions thereof to the caulking portions 17b and 20b of the inner plates 17 and 20 of both tanks 13 and 14, respectively. Between the connecting plates 21 and the heat radiating tubes 12 located at the outer end portions, and between the adjacent heat radiating tubes 12, plane wave-shaped heat radiating fins 22 are interposed.

  As shown in FIGS. 1, 2, 4, and 5, the front side of the inlet side tank 13 and the outlet side tank 14 (FIG. 1) at a position outside the basin of the external airflow used for the heat exchange. A reinforcing member 23 made of a metal plate such as aluminum is installed and fixed between the side end portions on the right side), and the plate thickness direction thereof is the same as the plate thickness direction of each heat radiating tube 12. The heat dissipating tube 12 is disposed in parallel. That is, bosses 24 and 25 are formed on the outer surfaces of the front end portions of the tank bodies 15 and 18 of both tanks 13 and 14, and two nuts 26 and 27 are embedded in the bosses 24 and 25, respectively. ing. In addition, a pair of insertion holes 23 d are formed at both ends of the reinforcing member 23. The pair of bolts 28 and 29 are screwed into the nuts 26 and 27 through the insertion holes 23d, so that the reinforcing member 23 is installed between the boss portions 24 and 25. Are fixed to tank bodies 15 and 18 of both tanks 13 and 14.

  Further, bent portions 23a and 23b are formed at right and left side edges of the reinforcing member 23 at right angles in opposite directions, and at the center portion along the longitudinal direction of the reinforcing member 23. A pair of extended reinforcing portions 23c are curved. These bent portions 23a, 23b and the reinforcing portion 23c constitute a reinforcing means for increasing the moment of inertia of the cross section.

  As shown in FIGS. 1 to 3, a pair of brackets 30 and 31 are attached to both ends of the lower surface of the tank body 15 in the inlet side tank 13 using bolts (not shown). Further, one bracket 32 is attached to the front end of the lower surface of the tank body 18 of the outlet side tank 14. A buffer member 33 including a buffer material such as rubber is interposed between at least one of the base end portion and the tip end portion of each bracket 30, 31, 32. Then, by fixing the end portions of these brackets 30 to 32 to the upper portion of the engine 35 with bolts 34, the heat exchanger 11 is mounted and supported on the engine 35 via the brackets 30 to 32 and the buffer member 33 at three points. It has come to be.

  As shown in FIGS. 1 and 3, a support arm 36 is brazed and fixed at one end on a bracket 31 located on the rear end side of the inlet side tank 13, and the other end is bolted out by a bolt 37. The tank 14 is fixed to the rear end of the lower surface of the tank main body 18. Thereby, the weight of the rear end portion side of the outlet side tank 14 not provided with the bracket is supported in a stable state by the bracket 31 on the rear end portion side of the inlet side tank 13 via the support arm 36. It has become.

And the heat exchanger 11 comprised as mentioned above is used as an intercooler of the engine which has a turbocharger.
Next, the operation of the heat exchanger 11 configured as described above will be described.

  When the engine 35 is operated, outside air flows through the plurality of heat radiation tubes 12 (in the direction of arrow P in FIG. 2). Then, air compressed by a turbine (not shown) is introduced into the inlet side tank 13 from the inlet 15a, guided into each heat radiation tube 12, and cooled by heat exchange with the outside air. Thereafter, the cooled air is led out from the outlet 18a of the outlet side tank 14 and distributed in a cylinder of an engine (not shown).

  By the way, the vibration of the engine 35 is directly transmitted to the heat exchanger 11 mounted on the engine 35. However, in this heat exchanger 11, a reinforcing member 23 is installed between the side end portions of the inlet side tank 13 and the outlet side tank 14, and the tanks 13 and 14 are firmly coupled and fixed by the reinforcing member 23. ing. For this reason, even if the engine 35 is a diesel engine and vibration is large, there is a possibility that a crack may occur in the brazed portion between the inner plates 17 and 20 of both tanks 13 and 14 and both ends of the heat radiating tube 12. Can be prevented.

  Further, the reinforcing member 23 is made of a metal plate, bent portions 23a and 23b are formed at both upper and lower side edges, and a pair of reinforcing portions 23c are formed at the central portion, so that the secondary moment is increased. ing. For this reason, it is not necessary to use a thick metal plate or a wide metal plate as the reinforcing member 23. Therefore, a sufficient reinforcing effect can be exhibited without substantially impairing weight reduction.

  Moreover, since the thickness direction of the reinforcing member 23 is parallel to the thickness direction of the heat radiating tube 12, the overall size can be avoided, and the heat exchanger 11 is installed in a narrow space in the engine room. Can be installed without problems.

  Further, in this heat exchanger 11, the reinforcing member 23 is installed between the side end portions of the tanks 13 and 14 at a position outside the flow area of the external airflow used for heat exchange. For this reason, the reinforcing member 23 does not exist in the flow of the outside air passing between the heat radiating tubes 12, and there is no possibility that the flow of the outside air becomes an obstacle. Therefore, it is possible to suppress the reinforcing member 23 from interfering with the external air flow and causing a decrease in heat exchange efficiency, or generating noise and vibration.

(Example of change)
In addition, this embodiment can also be changed and embodied as follows.
-The reinforcing member 23 is installed and fixed between the rear end portions of the tank bodies 15 and 18 of the tanks 13 and 14.

A pair of reinforcing members 23 are installed and fixed between the front and rear side end portions of the tank bodies 15 and 18 of the tanks 13 and 14.
・ Change the structure of the reinforcing means to increase the moment of inertia of the cross section. For example, the number of the reinforcing portions 23c is changed, or the pair of bent portions 23a and 23b are bent in the same direction.

The top view which shows the heat exchanger of one Embodiment. The front view which fractures | ruptures and shows a part of heat exchanger of FIG. The rear view of the heat exchanger. The fragmentary sectional view which expands and shows a part of the heat exchanger. The fragmentary perspective view which shows the reinforcement member of the same heat exchanger.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Heat exchanger, 12 ... Radiation tube, 13 ... Inlet side tank, 14 ... Outlet side tank, 15, 18 ... Tank main body, 17, 20 ... Inner plate, 23 ... Reinforcing member, 23a ... Folding as reinforcing means Curved part, 23c ... Reinforcing part as reinforcing means, 24, 25 ... Boss part, 26, 27 ... Nut, 28, 29 ... Bolt, 35 ... Engine.

Claims (5)

A plurality of flat heat dissipating tubes are juxtaposed, and one end of each heat dissipating tube is connected to the inlet side tank and the other end is connected to the outlet side tank. In the heat exchanger that is guided to the heat radiating tube and exchanges heat with the outside air, and then is distributed from the outlet side tank to the required location, the position is outside the basin of the external air flow used for the heat exchange, and the inlet A heat exchanger in which a reinforcing member is installed and fixed between side end portions of a side tank and an outlet side tank. The heat exchanger according to claim 1, wherein the inlet side tank and the outlet side tank have boss portions, and the reinforcing member is installed and fixed between the boss portions. 3. The heat exchanger according to claim 2, wherein the reinforcing member is made of a metal plate, and reinforcing means for increasing the second moment of section is formed on the metal plate. The heat exchanger according to claim 3, wherein the metal plate is disposed so that the metal plate is parallel to the heat radiating tube. The heat exchanger according to any one of claims 1 to 4, wherein the heat exchanger is used as an intercooler of an engine having a turbocharger.

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