JPH025890B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an engine cooling heat exchanger that uses a part of it as an intercooler.

[Prior art and its problems]

Conventionally, a heat exchanger for engine cooling and an intercooler for cooling charge air have been provided separately. Therefore, the area occupied by both of them becomes large, and their installation is troublesome.
Furthermore, each requires a separate water pump, which requires additional space.

[Object and structure of the invention]

Therefore, an object of the present invention is to provide an integrated heat exchanger in which a part of the engine cooling heat exchanger is used as an intercooler, and the structure thereof is as follows.

That is, in this heat exchanger, the heat exchanger core 3 has a large number of tubes 1 arranged in parallel to each other and a large number of fins 2 arranged in contact with each other between the tubes 1 and 1. Both ends of each tube 1 are watertightly connected to a pair of tanks 4 and 5. Then, while the engine cooling water 10 flows within the tube 1,
The configuration is such that gas flows through the outer surface of the tube 1 and the fins 2.

Here, the feature of the present invention is that the outer surface side of the heat exchanger core 3 is divided into an intercooler core part 6 and an engine cooling core part 7, and the boundary between the two core parts 6 and 7 is airtight. to be isolated. The front and back sides of the intercooler core section 6 are connected to the hem portions of the pair of charge air tanks 8 and 9, respectively. The engine cooling core portion 7 is configured to allow a cooling air flow 14 to flow therethrough.

Therefore, according to the present invention, a part of the engine cooling heat exchanger can be used as an intercooler, and an engine cooling heat exchanger having an integrated intercooler can be provided.

[Embodiments of the invention]

Next, embodiments of the present invention will be described based on the drawings.

FIG. 1 is a schematic perspective view of the heat exchanger of the present invention,
FIG. 2 is an exploded perspective view of the main part.

In this embodiment, a pair of cooling water circulation tanks 4 and 5 are provided spaced apart laterally, and a large number of tubes 1 are communicated between them in parallel.
A large number of fins 2 are brazed and fixed in contact between each tube 1, 1. A heat exchanger core 3 is constituted by an assembly of the tubes 1 and fins 2.

Here, the feature of the present invention is that, as shown in FIG. 2, on the tube outer surface side of the heat exchanger core 3, partition walls 11 and partition walls 12 are provided parallel to the tube 1 and spaced apart from each other. The partition walls 11 and 12 are, for example, made of relatively thick plates. An intercooler core part 6 is formed between the partition wall 11 and the partition wall 12, and an engine cooling core part 7 is formed above the partition wall 11.
form. Both core portions 6 and 7 are airtightly separated by this partition wall 11 as a boundary. The hem portions of charge air tanks 8 and 9 are airtightly attached to the periphery of the intercooler core portion 6 on its front and back sides, respectively. The two charge air tanks 8, 9 can be attached as shown in FIG. 4, for example. That is, the metal fitting 18 and the locking part 1
Both tanks 8 and 9 can be detachably attached to the intercooler core section 6 via the intercooler core section 7. This metal fitting 18 is formed like a fastening buckle for a travel trunk, ski boots, etc., and one end thereof is swingably attached to the air tank 9 side. and,
In this embodiment, a metal fitting 18 and a locking portion 17 are provided at one end and the other end in the longitudinal direction of the charge air tanks 8 and 9, respectively.

Incidentally, a plurality of cooling fins 16 may be formed protrudingly on the outer surface of the charge air tank 8 as shown in FIG. Cooling fin part 16 of this embodiment
are provided parallel to each other along the longitudinal direction of the outer surface of the charge air tank 8, so that the airflow that collides with the charge air tank 8 flows along the cooling fins 16. Therefore, the airflow that has reached a relatively high temperature after colliding with the charge air tank 8 does not flow to the engine cooling core section 7 side.

[Action of the invention]

Next, the operation of this heat exchanger will be explained.

First, in Figure 1, the charge air tank 8
The inlet side of the pump is connected to a supercharger (not shown).
At the same time, the outlet side of the charge air tank 9 is communicated with the air supply side of the internal combustion engine. Thus, the charge air 13 from the supercharger is transferred from one charge air tank 8 to the intercooler core part 6.
(Fig. 2) and is supplied to the engine from the other charge air tank 9. Charge air 13 is cooled by the cooling water flowing through tube 1 of intercooler core 6 while passing through intercooler core 6, and is supplied to an engine (not shown). Also, engine cooling water flows in from the inlet pipe 21 of the tank 4,
Outlet pipe 22 through each tube and tank 5
The water then flows back into the engine and is used as engine cooling water and circulated. During this time, engine cooling water 1
0 is cooled by a cooling air flow 14 that flows from the front side to the back side of the engine cooling core section 7.

Next, when the engine cooling water 10 is particularly high temperature, the cooling performance of the charge air 13 itself decreases. Therefore, in the embodiment shown in FIG. 6, the tanks 4 and 5 are provided with valves 19 and 20, respectively, which can be opened and closed.
Then, a rise in water temperature is detected by a thermosensor, and valves 19 and 20 are closed as shown by solid lines. Then, the engine cooling water 10 becomes 3 as shown by the arrow.
During the pass, it makes a U-turn inside the tanks 5 and 4, and is cooled during that time. The cooled engine cooling water 10 then flows to each tube of the intercooler core section 6. Thereby,
Charge air can be effectively cooled. Note that when the cooling water temperature is relatively low, the valve 19
The valve 20 is opened as shown by the chain line, and all the engine cooling water 10 is directly transferred from the tank 4 to the tank 5.
It is distributed as a pass. Since the cooling water temperature is sufficiently low at this time, the temperature of the charge air can also be lowered to a predetermined temperature.

[Modified example]

FIG. 5 shows a partition wall 11 formed at the boundary between the intercooler core section 6 and the engine cooling core section 7.
This is another embodiment, in which a partition wall 11 is inserted in place of the corrugated fins that should be inserted between adjacent tubes 1, 1.

Note that the present invention is of course not limited to the above embodiment, and for example, plate-type fins may be used instead of the corrugated-type fins 2. Further, in this embodiment, the tanks 4 and 5 are vertically spaced apart from each other, but they may be spaced apart from each other in the vertical direction. Also, in Fig. 6, valve 19 and valve 2
It is also possible to use a computer to control the opening and closing of 0 to increase the response speed.

〔Effect of the invention〕

The cooling heat exchanger of the present invention has the above configuration and has the following effects.

(1) In this heat exchanger, one heat exchanger core 3 has an intercooler core part 6 and an engine cooling core part 7.
A pair of charge air tanks 8,
Since the respective skirt portions of the heat exchanger 9 are connected to each other, an integrated intercooler can be obtained by using a part of the engine cooling heat exchanger. As a result, the heat exchanger including both can be made compact, and the space occupied by them can be reduced, contributing to the reduction in size and weight of automobiles. At the same time, since both are integrated, it is easy to install them within the engine room as a whole.

(2) Since the tanks 4 and 5 through which the cooling water flows can be shared by the intercooler core parts 6 and 7, there is no need for a separate intercooler tank and its pump as in the past.

(3) Furthermore, since the boundary between the intercooler core section 6 and the engine cooling core section is airtightly isolated, the charge air 13 will not leak to the engine cooling core section 7 side.

(4) Furthermore, this heat exchanger has an extremely simple structure in which it is separated into an intercooler core part 6 and an engine cooling core part 7, and charge air tanks 8 and 9 are provided in the intercooler core part 6. Since an integrated heat exchanger having an intercooler can be provided, it is easy to manufacture and can be provided at low cost.

[Brief explanation of drawings]

Fig. 1 is a schematic perspective view of the heat exchanger of the present invention, Fig. 2 is an assembled perspective view of the main parts thereof, and Fig. 3 shows another embodiment of the charge air tank 8 used in the heat exchanger of the present invention. A perspective view, FIG. 4 is an installation explanatory diagram for attaching charge air tanks 8 and 9 to tank 4,
FIG. 5 shows another embodiment of the partition wall 11 that separates the intercooler core section 6 and the engine cooling core section 7, and FIG. 6 shows a heat exchanger used when the engine cooling water 10 is at a relatively high temperature. Other Examples. 1...tube, 2...fin, 3...heat exchanger core, 4...tank, 5...tank, 6...core part for intercooler, 7... core part for engine cooling, 8...char Air tank, 9... Charge air tank, 10... Engine cooling water, 1
1, 12... Bulkhead, 13... Charge air, 1
4...Cooling air flow, 15...Puttight, 16...
... Cooling fin part, 17 ... Locking part, 18 ... Metal fitting, 19, 20 ... Valve, 21 ... Inlet pipe, 2
2...Exit pipe.

Claims (1)

[Claims] 1. A heat exchanger core 3 having a large number of tubes 1 arranged parallel to each other and a large number of fins 2 arranged in contact between each tube 1, 1, and both ends of each tube 1 being watertight. An engine cooling heat exchanger having a pair of communicating tanks 4 and 5, in which engine cooling water 10 flows through each tube 1, and gas flows through the outer surface of the tube 1 and the fin 2, The outer surface side of the heat exchanger core 3 is divided into an intercooler core part 6 and an engine cooling core part 7, and the boundary between the two core parts 6 and 7 is airtightly separated. A pair of charge air tanks 8 and 9 are connected to the front and back sides of the engine, respectively, and the hem portions of the pair of charge air tanks 8 and 9 are communicated with each other, and a cooling air flow 14 is made to flow through the engine cooling core portion 7. Engine cooling heat exchanger with body type intercooler.