JP2016161141A - Thin pipe support structure of tank for heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a support structure in which a bracket is brazed to a tank, and can be attached without generating heat strain during brazing, in a thin pipe support structure supporting a thin pipe inserted into the tank for a heat exchanger.SOLUTION: A bracket 3 is brazed on the outer surface of a tank 1 for a heat exchanger. In the bracket 3, a support part 4 of a thin pipe 2 is projected. The thine pipe 2 is inserted into a thin pipe insertion hole 5 of a support bracket 4 with a gap.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a support structure for a thin tube having a diameter of about 4 mm as an example, which is mainly inserted into a tank of a charge air cooler.

In an intake system of an engine with a supercharger, a charge air cooler is disposed downstream of the supercharger, thereby cooling the compressed air, increasing the intake air density, and improving the combustion efficiency of the engine.
In the charge air cooler used for this purpose, one end of a thin tube (for example, an outer diameter of about 4 mm) for sucking out oil liquefied by cooling the blow-by gas contained in the charge air is inserted, and the insertion portion The brazing is fixed. The end of the oil suction hose is fitted to the other end of the narrow tube.
Thus, when a thin tube is attached to the tank of the heat exchanger, the thin tube is easily deformed during transportation and other purposes. In order to prevent this, a support structure for preventing the bending of the thin tube is necessary.

In the heat exchanger of Patent Document 1 below, a bracket is fitted on the tank, and the pipe is supported by the bracket.
Similarly, the L-shaped thin tube 2 protruding from the heat exchanger tank 1 is brazed and fixed to the support plate 18 fixed to the bottom surface of the heat exchanger tank 1 to prevent the thin tube 2 from bending. Is possible.

Utility Model Registration No. 2542957

The piping support structure described in Patent Document 1 is to attach a bracket to the outer periphery of a tank made of a pipe material using its elastic deformation. Therefore, it is applied to a special tank shape and cannot be attached to the bottom surface of other tanks.
In addition, the support plate 18 shown in FIG. 7 can be attached to the bottom surface of the tank or the like, but when brazing, thermal distortion occurs in the joint due to the difference in thermal expansion between the thin tube 2 and the support plate 18, The reliability of brazing may be impaired.

  Accordingly, an object of the present invention is to provide a highly reliable support structure in which thermal distortion does not occur between the thin tube 2 and the support portion 4 in the structure in which the thin tube 2 is supported by brazing the bracket to the tank. .

According to the first aspect of the present invention, in the supporting structure of the thin tube (2), one end is inserted into the metal heat exchanger tank (1) and the insertion portion is brazed.
When brazing the narrow tube (2), the bracket (3) is brazed to the outer surface of the heat exchanger tank (1),
The bracket (3) is provided with a support portion (4) projecting perpendicularly to the direction in which the narrow tube (2) is disposed,
A narrow tube insertion hole (5) is provided in the support portion (4),
It is a thin tube support structure for a heat exchanger tank through which the thin tube (2) is inserted into the thin tube insertion hole (5) with a gap on the outer periphery thereof.

The invention according to claim 2 is the thin tube support structure for a heat exchanger tank according to claim 1,
The bracket (3) is a thin tube support structure for a heat exchanger tank that is joined in surface contact with the outer surface of the heat exchanger tank (1).

The invention according to claim 3 is the thin tube support structure for a heat exchanger tank according to claim 2,
The bracket (3) is a thin tube support structure for a heat exchanger tank serving as a mounting seat for the heat exchanger.

The invention according to claim 4 is the thin tube support structure for a heat exchanger tank according to claim 1 or 2,
The end of the hose is fitted on the end of the thin tube (2),
It is a thin tube support structure for a heat exchanger tank configured so that an end surface of the hose can be positioned on a support surface of the bracket (3).

The invention according to claim 5 is the thin tube support structure for a heat exchanger tank according to any one of claims 2 to 4,
The bracket (3) is bent into a substantially L-shaped longitudinal section, and the L-shaped rising surface and a plane perpendicular thereto are joined to the outer periphery of the heat exchanger tank (1). This is a thin tube support structure of a tank.

The thin tube support structure for a heat exchanger tank according to the present invention is such that the thin tube 2 is inserted into the thin tube insertion hole 5 of the bracket 3 with a gap.
Therefore, even if an external force is applied to the thin tube 2, it is possible to prevent the thin tube 2 from being supported and deformed by the lip of the thin tube insertion hole 6. Further, since the narrow tube 2 is inserted into the narrow tube insertion hole with a gap, even if a difference in extension occurs between the thin tube 2 and the bracket 3, the respective brazing can be performed accurately.
As described in claim 2, when the bracket 3 is joined in surface contact with the outer surface of the tank 1, since the tank of the joint is reinforced, the pressure strength of the tank against the internal pressure is improved, Tank deformation is suppressed.

When the bracket 3 is a mounting seat for the heat exchanger as described in claim 3, the single tube 3 supports the thin tube 2, reinforces the heat exchanger tank 1, and supports the heat exchanger. Can also serve.
When the end face of the hose can be positioned on the support surface of the bracket 3 as described in claim 4, the hose can be easily and accurately attached.

  When the bracket 3 is bent into a substantially L-shaped longitudinal section and the L-shaped rising surface and a plane perpendicular to the bracket 3 are joined to the outer periphery of the tank, the bracket 3 3 can be firmly fixed to the two planes of the tank, and the outer periphery of the tank 1 can be reinforced by the bracket 3.

The perspective view of the thin tube support structure of the tank for heat exchangers of this invention. The principal part perspective view of the support structure. The elevation view seen from the back side of the structure. The same side view. The elevation in the back side. The elevation view in the front side. The support structure compared with the thin tube support structure of this invention.

Next, embodiments of the invention will be described with reference to the drawings.
FIG. 1 is a perspective view of a thin tube support structure for a heat exchanger tank of the present invention. This structure is applied to a charge air cooler arranged downstream of a supercharger in an intake system of an engine with a supercharger. In this heat exchanger, the cores 11 are formed by alternately arranging the fins 12 and the tubes 13, and both ends of each tube 13 are inserted and fixed in the heat exchanger tank 1.

  The heat exchanger tank 1 includes a tank body 1a and a header plate 10, and a tube 13 is inserted into a tube insertion hole of the header plate 10, and the insertion portion is brazed and fixed. Then, heat exchanger tanks 1 are arranged at both ends of the core 11, and in this example, high-temperature charge air is supplied from the inlet pipe of the right heat exchanger tank 1 to each tube 13, which is the left heat exchanger tank. Outflow from 1 pipe. Then, cooling air is supplied to the outer surface of each tube 13 and the fin 12 side, and heat exchange is performed between the charge air and the cooling air.

  A bracket 3 is joined to the outer surface of the lower end of the heat exchanger tank 1. As shown in FIGS. 2 to 4, the bracket 3 has a rising surface 3 a and a flat surface 3 b bent in a substantially L shape. And the trapezoid part protrudes in the plane 3b, and it contacts the lower surface of the tank 1 for heat exchangers. At the same time, the rising surface 3a comes into contact with the side surface of the heat exchanger tank 1, and the respective contact portions are integrally brazed and fixed.

  And the protrusion 20 which protrudes below is provided between the raising surface 3a and the plane 3b, and the fastening hole 15 is drilled there. Further, an opening 16 is formed at the center of the rising surface 3a, and a small hole 17 is formed in the rising surface 3a and the flat surface 3b. Moreover, the edge part of the plane 3b protrudes from the tank 1 for heat exchangers, and is bent in the L shape below, and forms the support part 4 there. A narrow tube insertion hole 5 is formed in the support portion 4. The diameter of the thin tube insertion hole 5 is larger than the outer diameter of the thin tube 2. An annular bulging portion 2a is formed at the tip of the thin tube 2, and the diameter of the thin tube insertion hole 5 is slightly larger than the outer diameter of the annular bulging portion 2a.

  As for this bracket 3, the plane 3b is contact | abutted by the bottom face of the tank 1 for heat exchangers, and the standing surface 3a is contact | abutted by the side surface of the tank 1 for heat exchangers. At this time, the end of the L-shaped narrow tube 2 is inserted into the narrow tube insertion hole 5 of the bracket 3, and the insertion portion is held in a loosely fitted state. The bracket 3 is temporarily fixed to the bottom surface and the side surface of the heat exchanger tank 1 through a small hole 17 provided in the rising surface 3a and the flat surface 3b by means such as a rivet. Then, the parts are assembled as shown in FIG. 1, and the parts are integrally brazed and fixed.

  In FIG. 2, the opening 16 improves the brazing around the brazing between the rising surface 3 a and the side surface of the heat exchanger tank 1. And, since the thin tube 2 is brazed in a state where it is loosely fitted in the thin tube insertion hole 5 of the bracket 3, even if a difference in elongation occurs between the bracket 3 and the thin tube 2, thermal distortion occurs between them. There is nothing to do.

The heat exchanger is fixed to the vehicle body frame by a fastener (not shown) that is aligned with the fastening hole 15 of the protrusion 20 of the bracket 3 thus formed.
Then, a hose 9 made of a rubber material is fitted into the end portion of the thin tube 2, and is fastened to the thin tube 2 by a clamp (not shown) at a position where the tip approaches or contacts the support portion 4 of the bracket 3.

  Therefore, as shown in FIG. 4, the thin tube 2 is supported in a loosely fitted state in the thin tube insertion hole 5 of the support portion 4 of the bracket 3. Further, the rising surface 3a and the flat surface 3b of the bracket 3 are brazed to the side surface and the flat surface of the heat exchanger tank 1 to form a reinforcing structure. Furthermore, the heat exchanger is supported and fixed with the protrusion 20 protruding from the lower surface of the bracket 3 as a mounting seat.

  In addition, although the said Example demonstrated the support structure of the thin tube in a charge air cooler, it cannot be overemphasized that this invention can be utilized as a support structure of the thin tube of another heat exchanger.

DESCRIPTION OF SYMBOLS 1 Heat exchanger tank 1a Tank main body 2 Narrow tube 2a Expansion part 3 Bracket
3a Startup surface
3b Plane 4 Supporting part 5 Capillary insertion hole

9 Hose
10 Header plate
11 core
12 fins
13 tubes
15 Fastening hole
16 opening
17 Small hole
18 Support plate
20 protrusion

Claims (5)

In the support structure of the thin tube (2) where one end is inserted into the metal heat exchanger tank (1) and the insertion part is brazed,
When brazing the narrow tube (2), the bracket (3) is brazed to the outer surface of the heat exchanger tank (1),
The bracket (3) is provided with a support portion (4) projecting perpendicularly to the direction in which the narrow tube (2) is disposed,
A narrow tube insertion hole (5) is provided in the support portion (4),
A thin tube support structure for a heat exchanger tank, through which the thin tube (2) is inserted into the thin tube insertion hole (5) with a gap on the outer periphery thereof. In the thin tube support structure for a heat exchanger tank according to claim 1,
A heat exchanger tank thin tube support structure in which the bracket (3) is joined in surface contact with the outer surface of the heat exchanger tank (1). In the thin tube support structure for a heat exchanger tank according to claim 2,
A thin tube support structure for a heat exchanger tank, wherein the bracket (3) serves as a mounting seat for the heat exchanger. In the thin tube support structure for a heat exchanger tank according to claim 1 or 2,
The end of the hose is fitted on the end of the thin tube (2),
A thin tube support structure for a heat exchanger tank configured such that an end surface of the hose can be positioned on a support surface of the bracket (3). In the thin tube support structure for a heat exchanger tank according to any one of claims 2 to 4,
The bracket (3) is bent into a substantially L-shaped vertical cross section, and the L-shaped rising surface and a plane perpendicular thereto are joined to the outer periphery of the heat exchanger tank (1). Tubule support structure.

Images