JPH0229430Y2 - - Google Patents

Description

[Detailed description of the invention] Application industry field This invention relates to the improvement of heat exchangers such as cooling oil used for cooling vehicle-mounted transformers, etc.
This invention relates to an oil cooling heat exchanger that has a smaller header tank, lowers the height of the heat exchanger, is smaller and lighter, and is easier to install on vehicles, etc.

BACKGROUND ART A transformer mounted on a train or the like is normally installed vertically under the floor of the vehicle, and an oil cooling heat exchanger used for cooling the transformer is also attached thereto.
Therefore, under the vehicle floor, where there is only limited space,
There are strict restrictions on the height dimension of oil cooling heat exchangers, making it difficult to install and arrange them.

Conventionally, as shown in FIGS. 5 and 6, a header tank 2 is provided on the entire upper and lower surfaces of the heat exchange core 1, and mounting legs 3 are attached to the header tank 2, and the vehicle 4
It was placed on a support beam 6 suspended horizontally from a transformer 5 placed under the floor. Therefore, the downward dimension of the heat exchange core 1 is large, and when there is a demand for a larger cooling capacity, various dimensional problems have arisen, such as an increase in the size of the main body and a mounting method. In addition, 7 in the drawing is an air duct.

Further, in conventional oil-cooled heat exchangers, header tanks were provided on the entire upper and lower surfaces of the heat exchange core, which caused problems in terms of weight as well, since the amount of oil contained therein was large. It is also conceivable to reduce the size of the header tank and provide a distributor fin within the heat exchange core, but this is impractical due to the large pressure loss when the cooling oil passes through it.

Purpose of the invention This invention reduces the height of oil cooling heat exchangers for vehicle-mounted transformers, etc., and reduces the amount of oil in the header tank without reducing the cooling capacity. The aim is to create an oil cooling heat exchanger that is compact and lightweight, and eliminates restrictions on dimensions and installation methods when installing it under the floor of a vehicle.

Structure of the device This device is a heat exchanger in which tube plates and fins are stacked, oil passages flowing vertically and air passages passing horizontally are arranged alternately, and header tanks are installed at the upper and lower ends. In the container, a spacer bar is placed at the upper and lower ends between the tube plates in the air passage, and the spacer bar has a passage structure that is completely opened in the stacking direction, and the tube plate has an oil passage hole that communicates with the oil passage on the surface that contacts and faces the spacer bar. This is a heat exchanger for cooling oil, characterized in that at least one header tank is disposed in series with only the opening provided on the outward surface of the spacer bar.

More specifically, this invention consists of stacking tube plates and fins, and alternately arranging oil passages that flow down vertically and air passages that pass horizontally, and between the plates of the air passages. The spacer bars held at the upper and lower ends are made into passages that are fully open in the stacking direction, and oil passage holes are also provided in the relevant portion of the tube plate that comes into contact with the spacer bars, and oil passage holes are provided in the small openings provided on the outward end faces of the spacer bars. The header tank is connected, and the cooling oil is introduced into the oil passage through a spacer bar in the air passage, and the cooling oil flows out.The header tank is simply introduced and functions as an outflow passage, making the header tank smaller and lowering the height of the heat exchanger. This oil cooling heat exchanger is characterized by being lightweight by reducing the amount of cooling oil built into it.

The oil-cooling heat exchanger according to this invention can be used not only for the above-mentioned vehicle-mounted transformers, but also for various devices by taking advantage of its small height, small size, and light weight. Applicable to cooling coolant liquid, etc., and heat exchange.

DISCLOSURE BASED ON DRAWINGS OF THE INVENTION FIG. 1 is an explanatory perspective view showing the configuration of an oil cooling heat exchanger according to the invention, and FIG. 2 is an exploded perspective view showing the assembled configuration. FIG. 3 is a partial vertical cross-sectional view of FIG. 1, FIG. 4A is a vertical side view of the oil passage, and FIG. 4B is a vertical side view of the air passage.

The heat exchange core 10 has a structure in which air passages 13 through which air passes in a horizontal direction and oil passages 14 through which cooling oil flows down in a vertical direction are alternately stacked, and header tanks 11 and 12 are installed on the upper and lower surfaces thereof. It is.

First, the air passage 13 is formed by sandwiching a corrugated fin 15 with a vertical corrugation direction between tube plates 17 with spacer bars 16 arranged at the upper and lower ends.

The oil passage 14 is formed by sandwiching serrated fins 18 with the corrugation direction horizontally arranged between tube plates 17 with spacer bars 19 arranged on all sides. However, at the upper and lower ends of the passage fins, straight fins 18a are used at the portions of the air passage 13 facing the spacer bars 16 due to strength issues during use.

The spacer bar 16 of the air passage 13 is completely open in the stacking direction, and has an oil inlet and an oil inlet in the center of the outward surface.
In the case of the lower side, an oil outlet is provided, and here it is formed by bending a narrow plate.

Further, a plurality of oil passage holes 17a are formed in the tube plate 17 in a portion facing the side opening of the spacer bar 16.

When assembling, the required number of corrugated fins 15, spacer bars 16, tube plates 17, serrated fins 18, straight fins 18a, space bars 19, and tube plates 17 are arranged in this order, and they are brazed between the two end plates 20. They are integrated to form a heat exchange core 10.

Header tanks 11 and 12 are arranged on the upper and lower surfaces of the heat exchange core 10 so as to be connected to and continuous with the oil inlet and oil outlet of the air passage 13 which is dotted with openings in the stacking direction in the central part. has been done.

With the above configuration, when the heated cooling oil from the transformer flows into the upper header tank 11, it first flows from the header tank 11 into each oil inlet of the spacer bar 16 in the air passage 13, and then flows into each spacer bar 16. Enter, and then tube plate 1
7 through the oil passage hole 17a, the adjacent oil passage 1
The oil flows into the serrated fins 18 through both sides of the straight fins 18a in the oil passageway 14, and while flowing down the oil passageway 14, exchanges heat with the air passing through the air passageway 13.
The cooled oil flows through the oil passage 14, the oil passage hole 17a of the tube plate 17, and the air passage 1.
The oil is discharged through the spacer bar 16 of No. 3, the oil outlet, and the lower header tank 12, and then introduced into the transformer again.

In addition, the position and number of header tanks can be set arbitrarily depending on the dimensions under the vehicle floor and restrictions on the installation method, in addition to the one in the center of the example, and the spacer bar can also be set in any of the configurations in addition to the configuration in the example. It may be formed by a manufacturing method, or a vertical reinforcing column or the like may be inserted into the passage.

Effects of the invention As mentioned above, the oil cooling heat exchanger according to this invention utilizes the spacer bar on the air passage side as a distribution and gathering passage, so the header tank functions simply as a passage to the spacer bar, and the header tank is made smaller. By lowering the height of the heat exchanger and reducing the amount of oil built into it, weight reduction can be achieved.

In addition, since the height and width of the header tank in the heat exchange core can be reduced, for example, as shown by the imaginary line in FIG. 1, mounting legs to the support beam can be provided near the header tank within its height.
It has the advantage that it can be easily installed within the limited dimensions under the floor of a vehicle, or it can be directly installed on the transformer using a mounting angle member or the like.

[Brief explanation of the drawing]

FIG. 1 is an explanatory perspective view showing the structure of the oil cooling heat exchanger according to this invention, and FIG. 2 is an exploded perspective view showing the assembled structure. 3 is a partially vertical front view of FIG. 1, FIG. 4A is a vertical side view of the oil passage, and FIG. 4B is a vertical side view of the air passage. FIGS. 5 and 6 are a front view and a side view of a conventional oil cooling heat exchanger. 10... Heat exchange core, 11, 12... Header tank, 13... Air passage, 14... Oil passage, 1
5... Corrugated fin, 16, 19... Spacer bar, 17... Tube plate, 17a...
...Oil passage hole, 18... Serate fin, 18a...
...Straight fin, 20...end plate.

Claims (1)

[Scope of utility model registration request] In a heat exchanger in which tube plates and fins are stacked, oil passages flowing vertically and air passages passing horizontally are arranged alternately, and header tanks are installed at the upper and lower ends, the tubes in the air passage are A spacer bar with a passage structure that is placed at the upper and lower ends between the plates and is fully open in the stacking direction is sandwiched between tube plates that have an oil passage hole that communicates with the oil passage on the surface that abuts and faces the spacer bar. A heat exchanger for cooling oil, characterized in that at least one header tank is disposed in series only with an opening provided on an outward surface of the spacer bar.