WO2008123603A1

WO2008123603A1 - Heat exchange device

Info

Publication number: WO2008123603A1
Application number: PCT/JP2008/056738
Authority: WO
Inventors: Haruhiko Watanabe; Sumio Susa; Masaki Harada
Original assignee: Denso Corporation
Priority date: 2007-03-30
Filing date: 2008-03-28
Publication date: 2008-10-16
Also published as: JP2008249252A

Abstract

A heat exchange device in which heat exchangers are sequentially connected through header tanks. Each heat exchanger has, as a core section, tubes in which fluid flows and wavy fins that are placed between the tubes. The header tanks each have a core plate section, at which tubes of each heat exchanger are joined at portions near their ends, and the header tanks connect the core plate sections together so that the core plate sections are in intimate contact with and fixed to each other. The end sides of the tubes are open to a closed space in each header tank.

Description

Heat exchanger

Technical field

The present invention relates to a heat exchange device. Light

Background art

Conventionally, in order to form a heat exchange device (for example, an intercooler), a plurality of heat exchangers (intercooler I.C. single unit) are connected in series via a pipe P. Yes (see Figure 9 and Figure 10).

In this case, for example, a radiator used for an engine of a large construction machine should be able to withstand severe use conditions such as severe vibrations and shocks. In order to be able to be easily repaired by replacement, a composite heat exchange device formed by connecting small heat exchange devices in series or in parallel is often used.

For example, as shown in Japanese Utility Model Publication No. 6 3-3 0 7 70, both upper and lower heat exchangers arranged in series are provided with protrusions that can be superposed on each other, and both protrusions are provided on the polymerization surface. There are bolts and nuts that communicate with the sub-tanks, and both sub-tanks are combined, and both sub-tanks are fixed to a reinforcing rod that is integrated with both main tanks by appropriate means.

By the way, the pressure loss of the supercharged air, which is one of the performance indicators of the heat exchanger of the intercooler, is generally considered to be divided as follows:

Δ P g total = Δ P g pipe + Δ P g tube + Δ P g core {where AP g total is the pressure loss of the entire cooler, Δ P g pipe is the pipe pressure loss (expansion and contraction, Friction), AP g tube: Tube inlet / outlet pressure loss (expansion / shrinkage), AP g core: Core loss (tube internal friction)}

Therefore, when connecting each intercooler I.C., when connected as shown in Fig. 9, there are three pipe parts P (Δ P g pipe) that cause pressure loss, two pipe inlets and outlets (AP g tube), There is one core part, and there are two pipe parts p (Δ P g pipe) as the places where pressure loss occurs in a single air cooler IC (see Fig. 10). Since there is one outlet (AP g tube) and one core part, the one connected in series as shown in Fig. 9 has an overall pressure loss (AP g It can be seen that (total) becomes high.

The present invention has been proposed to improve such a problem, and it is possible to reduce the pressure loss of the supercharged air, while at the same time strengthening the structure by increasing the rigidity at the time of connection, making it earthquake resistant. An object of the present invention is to provide a heat exchange device that improves the quality of the heat exchanger. Disclosure of the invention

According to the present invention, there is provided a heat exchange device configured by sequentially connecting a plurality of heat exchangers via a header tank. The heat exchanger includes, as a core portion, a plurality of tubes through which fluid flows, and these The header tank is provided with a core plate portion in which the vicinity of a plurality of tube ends are joined to each other in each heat exchanger, and the core plate portion is provided with a corrugated fin interposed between the tubes. A heat exchange device is provided in which a plurality of tube end portions are open to a sealed space in a header tank formed by a core plate portion, and are configured to be firmly fixed to each other and connected. The

According to one aspect of the present invention, adjacent to each other in the header tank. In the heat exchanger, a plurality of tubes are connected so as to be able to flow with each other.

One aspect of the present invention is characterized in that a fin is interposed in the tube.

According to one aspect of the present invention, a header tank between adjacent heat exchangers is configured to be attached to a vehicle body.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Brief Description of Drawings

FIG. 1 is a configuration explanatory view showing a first embodiment in a heat exchange device according to the present invention.

FIG. 2 is a side view of the heat exchange device shown in FIG.

FIG. 3 is a cross-sectional view taken along line AA shown in FIG.

FIG. 4 is a cross-sectional explanatory view of a connecting portion according to the second embodiment of the heat exchange device according to the present invention.

FIG. 5 is a schematic exploded perspective view showing the connection configuration of the connection points shown in FIG.

FIG. 6 is a cross-sectional explanatory view of a connecting portion according to the third embodiment of the heat exchange device according to the present invention.

FIG. 7 is a configuration explanatory view showing a fourth embodiment of the heat exchange device according to the present invention.

FIG. 8 is a side view of the heat exchange device shown in FIG.

FIG. 9 is a schematic configuration explanatory diagram showing an example of an assembly configuration of a conventional heat exchange device.

FIG. 10 is an explanatory diagram of a schematic configuration of a single heat exchanger. BEST MODE FOR CARRYING OUT THE INVENTION

(First embodiment)

1 and 2 schematically show a heat exchange device 10 according to the present invention. This heat exchange device 10 is an intercooler, and is configured by connecting a plurality (two in this case) of heat exchangers 10 u to each other via a header tank 11.

The heat exchanger 10 u 'is substantially composed of a plurality of flat tubes 1 3 having a cross-sectional shape in which cooling water circulates as a fluid as a core portion 1 2, and a tube between these tubes 1 3. 1 Corrugated fins 14 joined to the outer surface of 3 to increase the heat transfer area with the air, and the respective heat exchangers l O u are located at both longitudinal ends of the tube 13 The header tank 1 1 communicates with each tube 1 3. The header tank 11 includes a core plate portion 1 1 a in which the vicinity of the ends of the plurality of tubes 1 3 in each heat exchanger 10 u are joined to each other. It is configured to be liquid-tight in area, for example, connected via a mating edge lie fixed by brazing.

In that case, each of the heat exchangers 10 u is open to the sealed space in the header tank 11, which is composed of the core plate portion 1 1 a, at the end of the tubes 1 3 (FIG. 3). See).

In addition, in the heat exchange device 10 composed of these two heat exchangers 10 u, in the figure, the upper introduction tank section 15 includes a cooling water inlet pipe 1 6 and a lower discharge tank section 1 7. The outlet pipe 1 8 is provided. According to the above connection configuration, the location where pressure loss occurs is the two locations of the cooling water inlet pipe 1 6 and outlet pipe 1 8 (AP g pipe), the core As the inlet / outlet pressure loss to tube 1 3 in section 1 2 (Δ P g tube), the pressure loss in the core part 1 2 is one (Δ P g core), and at least the pressure loss is suppressed compared to the in-cooler with the connected configuration shown in FIG. Can do. -In addition, by combining two heat exchangers 10 u through the header tank 11, at least two heat exchangers compared to a single heat exchanger (intercooler) of the same size Exchanger 1 0 Header dunk located in the middle of u 1 1 Increased rigidity and improved earthquake resistance depending on the joint location

(Second embodiment)

The heat exchange apparatus 10 according to the present invention can also be configured as shown in FIG.

In this heat exchange device 10, two heat exchangers l O u are connected to each other, and a plurality of tubes 13 in adjacent heat exchangers 10 u are circulated in the header tank 11. It is configured to be connected as possible.

In other words, a plurality of tubes 13 in adjacent heat exchangers 10 u are directly connected by connecting pipes 19, respectively. Note that fins f may be interposed in the tube 13 as shown in FIG.

As a result, the tubes 13 were directly connected to each other, so that the pressure loss shown in the first embodiment caused an inlet / outlet pressure loss to the tube 13 in the core portion 1 2 (AP g tube). Therefore, pressure loss can be reduced.

Note that the configuration in which the fin f is interposed in the tube 13 is disadvantageous in terms of pressure loss, but the fluid flows through the tube 13 in contact with the fin f. Can be promoted. (Third embodiment)

The heat exchanging device 10 according to the present invention can also be configured as shown in FIG.

In the heat exchange device 10 in this case, the header tank 11 connecting the adjacent heat exchangers 10 u is fixed to an appropriate fixing member in the vehicle body.

In this case, the supporting auxiliary member 20 is sandwiched between the mating edges 1 le, which are the contact surfaces of the header tanks 1 1 in both heat exchangers 10 u, by the first tightening poles 2 1. The support auxiliary member 20 is fixed to the appropriate fixing member 22 of the vehicle body by the second tightening port 2 3.

According to the heat exchange apparatus 10 as described above, since the rigidity and strength are improved by connecting the heat exchangers l O u through the header tank 11, the header tank 11 is used. By fixing to the vehicle body side, it is possible to secure a strength that can sufficiently withstand vibrations and shocks during driving transmitted from the vehicle body.

(Fourth embodiment)

The heat exchanging device 10 according to the present invention can also be configured as shown in FIGS.

As described above, in the first to third embodiments, an example in which two heat exchangers l O u are connected has been described. Of course, three heat exchangers 10 u may be combined. Good.

In this case, the pressure loss occurs at two locations (AP g pipe) of the cooling water inlet pipe 16 and outlet pipe 18, and the inlet / outlet pressure loss to the tube 1 3 at the core portion 1 3 1 point (AP g core) as pressure loss in the location (AP g tube) and core 1 2 As described above, the present invention eliminates the pipe connecting the heat exchangers 10 u and connects the heat exchangers 10 u to each other via the header tank 11 1. Since the strength is improved and the pipe connecting the heat exchanger 10 u is eliminated, the pressure loss can be reduced, and high efficiency is ensured even if three heat exchangers l O u are connected. can do.

Claims

1. A heat exchange device constructed by sequentially connecting a plurality of heat exchangers via a header tank,

The heat exchanger includes, as a core part, a plurality of tubes through which a fluid flows, and a wavy fin interposed between the tubes,

Contract

The header tank includes a core plate portion in which the vicinity of a plurality of tube ends in each heat exchanger is joined to each other, and the core plate portions are connected to each other while being firmly fixed to each other.

The heat exchanger according to claim 1, wherein the plurality of tube end portions are opened and surrounded by a sealed space in a header tank constituted by a core plate portion.

2. The heat exchanger according to claim 1, wherein a plurality of tubes in adjacent heat exchangers are connected to each other so as to be able to directly flow in the header tank.

3. The heat exchange device according to claim 1 or 2, wherein a fin is interposed in the tube.

4. The heat exchange device according to claim 1 or 2, wherein a header tank between adjacent heat exchangers is attached to the vehicle body.