JPH0452428Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to, for example, an integrated oil cooler and a radiator for cooling engine cooling water.

[Prior art]

Conventionally, in order to integrate, for example, an engine coolant cooling radiator and an air conditioning heat exchanger, a proposal has been made in which a tank is provided with a partition, as shown in FIG. 3.
That is, a large number of tubes 3 are arranged parallel to each other between a pair of vertically spaced tanks 13, 13, and both ends thereof penetrate the tube plate 2 of the tank 13, and the penetrating portions are fixed by brazing. At the same time, a corrugated fin 10 is brought into contact between the adjacent tubes 3, and the contact portion is brazed and fixed.
Partitions 14, 14 are provided at matching positions in the respective tanks 13, 13, and engine cooling water flows in from the inlet pipe 15 on the right side of the partition 14 of the upper tank 13, and the engine cooling water flows in from the inlet pipe 15 on the left side.
Let engine oil flow in from 6. Then, engine oil is passed through the tubes 3 on the left side of the partition 14, and engine cooling water is passed on the right side, and the outlet pipes 1 of the tank 13 on the bottom side are made to flow.
7 and 18 separately.

[Problem to be solved]

However, such a conventional structure has problems with reliability, especially in the brazed portion of the partition 14, and
It is troublesome to inspect the reliability of the brazing by a pressure test or the like. Furthermore, when a leak occurs in the brazed portion, it is difficult to repair it.

[Means for solving problems]

Therefore, the purpose of the present invention is to provide a radiator with a tank structure that allows for easy pressure testing of each heat exchange medium in a radiator having two tanks, as well as easy repair and inspection. It is as follows.

That is, the end portions of a large number of tubes 3 are passed through a tube plate 2 having an annular groove 1 formed on its periphery, and the penetrating portions are brazed and fixed in a fluid-tight manner. The ends of only some of the tubes 3 are communicated with the sub-tank 5, and the communicating portions are brazed and fixed in a fluid-tight manner. A sub-pipe section 4 for circulating the second heat exchange medium is provided protruding from the outer surface of the sub-tank 5. Furthermore, the hem 7 of the main tank 8 is connected to the groove 1 of the tube plate 2.
The fitting part is fixed liquid-tightly. At the same time, the first heat exchange medium is circulated through the main tank 8, and
The structure is such that airflow flows through the outer surface of the tube 3.

〔Example〕

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

FIG. 1 is a schematic perspective view showing the main parts of the present radiator structure, and FIG. 2 is a schematic cross-sectional view of the same. The radiator of this embodiment has a main tank 8 made of so-called synthetic resin, and a sub-tank 5 made of metal is provided inside the main tank 8. That is, the ends of the flat tubes 3 are passed through the tube insertion holes of the tube plate 2 which are vertically spaced apart, and the corrugated fins 10 are disposed between the tubes 3 . This tube plate 2 has an annular groove 1 formed at its periphery. In addition, tube plate 2
The outer surface of the tube 3 is previously clad with a brazing filler metal. Among the large number of tubes 3 passing through the tube plate 2, in this embodiment, the tip of the tube on the front row side or a portion of the tube 3 is inserted into the tube insertion hole of the sub tank 5. Such work is performed on a pair of upper and lower tube plates, and the whole is held with a suitable jig and inserted into a high-temperature furnace. Then, the brazing material on the surfaces of the tube 3 and tube plate 2 is melted, and the respective contact portions are brazed and fixed. Then, a structure as shown in FIG. 1 is obtained. In this state, a pressure test was performed on the brazed portion between the sub tank 5 and the tube 3, and then the hem 7 of the main tank 8 was fitted around the outer periphery of the tube plate 2 via the O-ring 6 as shown in FIG. wear. and,
A sub pipe part 4 of a sub tank 5 is liquid-tightly penetrated into a main tank 8 via a packing 9. In this embodiment, the tube plate 2 is made of aluminum or its alloy plate, and the edge of the groove 1 is connected to the skirt 7.
By caulking, the space between the main tank 8 and the tube plate 2 is made liquid-tight. and,
Engine cooling water 19 is made to flow in through the main pipe section 12 protruding from the main tank 8, and is made to flow out from the main pipe section 12 of the main tank 8 on the lower side through each tube 3. Further, the oil 20 flows into the secondary pipe portion 4 of the upper secondary tank 5 and flows out from the secondary pipe portion 4 of the lower secondary tank 5 via the respective tubes 3.
An air flow 21 is circulated in the direction of the arrow by a fan or the like, and heat exchange is performed between the air flow 21, oil 20, and engine cooling water 19, respectively.

[Modified example]

It should be noted that the present invention is of course not limited to the above-mentioned embodiments; for example, the main tank 8 may be constructed of a metal plate, and its skirt portion 7 may be fixed to the circumferential edge of the tube plate 2 by brazing. In this case, the groove 1 formed on the outer periphery of the tube plate 2 has a relatively narrow groove width. The penetrating portion of the sub pipe portion 4 penetrating the main tank 8 can be fixed liquid-tightly by brazing. Furthermore, in the embodiment shown in FIG.
The penetrating portion between the main tank 8 made of synthetic resin and the sub pipe portion 4 may be fixed liquid-tightly with an adhesive.

[Effect of idea]

The radiator structure of the present invention has the above configuration and has the following effects.

The radiator structure of the present invention has a second tank in the sub tank 5.
While the heat exchange medium flows, the first heat exchange medium also flows to the main tank 8 which is covered with the outer side of the main tank 8. Therefore, in a system that allows two different heat exchange media to flow simultaneously and perform heat exchange with the air stream, it is possible to easily conduct a pressure test, especially of the secondary tank 5 for flowing the second heat exchange medium. That is, unlike the tank structure of this type of conventional radiator, there is no partition inside the tank, so we first conducted a pressure resistance test, especially of the brazed portion between the sub tank 5 and the tube 3, in the absence of the main tank 8. can be done. Of course, the main tank 8 can also be subjected to a pressure test even if the main tank 8 is damaged outwardly. Therefore, a highly reliable composite radiator can be provided, and the radiator can be easily manufactured and mass-produced.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of the main parts of the radiator of the present invention.
FIG. 2 is a schematic vertical cross-sectional view of the same, and FIG. 3 is a vertical cross-sectional view of essential parts of a conventional radiator. 1...Groove portion, 2...Tube plate, 3...
Tube, 4...Sub-pipe section, 5...Sub-tank,
6... O-ring, 7... Hem, 8... Main tank,
9... Patsukin, 10... Colgate Finn, 1
1...Brazing part, 12...Main pipe part, 13...
... Tank, 14 ... Partition, 15, 16 ... Inlet pipe, 17, 18 ... Outlet pipe, 19 ... Engine cooling water, 20 ... Oil, 21 ... Air flow.

Claims (1)

[Claims for Utility Model Registration] (1) A tube plate 2 having an annular groove 1 formed on its periphery, and a large number of tube plates 2 whose ends are penetrated and the penetrating portions are liquid-tightly brazed. The tubes 3 and the end portions of only some of the tubes 3 communicate with each other, and the communicating portions are liquid-tightly brazed and fixed, and a sub-pipe portion 4 for second heat exchange medium circulation is provided on the outer surface. The sub-tank 5 protrudes from the sub-tank 5, and the sub-pipe part 4 penetrates the sub-tank 5 in a liquid-tight manner and covers the outside of the sub-tank 5, and the hem part 7 fits in the groove part 1 in a liquid-tight manner. a fixed main tank 8;
A radiator configured such that a heat exchange medium flows therethrough and an airflow flows around the outer surface of the tube 3. (2) The main tank 8 is made of a synthetic resin molded body,
The radiator according to claim 1, wherein the skirt portion 7 is fitted into the groove portion 1 via an O-ring 6, and the outer periphery of the groove portion 1 is fastened and fixed by caulking.