JPH0320500Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an aftercooler for a turbocharger of an internal combustion engine.

Turbocharging has come to be installed in internal combustion engines such as automobiles, but since the intake air of the engine becomes high in temperature due to turbocharging and tends to reduce charging efficiency, aftercoolers are used to cool this air. Conventional aftercoolers are ordinary shell-and-tube heat exchangers that simply absorb, conduct, and dissipate heat through heat transfer, so they require a relatively large surface area and are large and heavy. It's easy to become. In particular, requiring a large contact area on the side of the fluid to be cooled leads to a complicated intake air flow path and increased resistance.

This invention is intended to solve the above-mentioned problems, and provides an aftercooler that has high performance and can be miniaturized.

The structure of this invention is to apply high-temperature air to the evaporation section of the heat pipe to rapidly remove heat, and the heat pipe is rotatable with multilayer heat absorption fins and heat radiation fins attached to the evaporation section and condensation section. This creates an air flow between each fin to increase heat exchange efficiency, and the blades and protrusions attached to the heat dissipation fins increase the air volume in the heat dissipation section to improve the above effect. The heat exchange efficiency is increased by increasing the amount of heat absorbed by the blades and by increasing the rotational speed of the rotor. The rotational power is provided by the intake air itself sent out from the turbocharger, eliminating the need for any other power.

To explain this by way of an example, in FIG. 1, air taken into an internal combustion engine 1 is purified by an air cleaner 2, compressed by a compressor 4 of a turbocharger 3, heated to a high temperature, and sent out through an air pipe 5 to an aftercooler 6 of this invention. The air is then cooled and reaches the intake pipe 7 of the engine, where it becomes combustion air. In the figure, 8 is an exhaust turbine of the turbocharger 3. An example of the aftercooler of this invention, which is assembled as shown in FIG. 1, is shown in FIGS. 2 and 3. In the figure, the aftercooler 6 has a plurality of heat pipes 11 arranged parallel to a shaft 10 supported by a bearing 9, and has an annular shape having a central opening 13 by interconnecting condensing parts 12 forming the upper part of each heat pipe. Plate-shaped heat dissipation fin 1
A plurality of heat pipes 4 are stacked at appropriate intervals and attached at right angles to the heat pipe 11. heat pipe 11
The evaporation section 15 has a central opening 16 which connects these.
A plurality of annular heat-absorbing fins 17 are attached to the heat pipe 11 in multiple layers at right angles to each other.

If necessary, a part of the heat dissipation fin 14 may be provided with the parts shown in FIG.
As shown in FIG. 5, a shaft 10 is attached to the edge of the central opening 13.
A plurality of blades 1 with an inclination angle α and a twist angle β
3a is attached.

Further, if necessary, blades 18 extending in the radial direction and standing upright in parallel to the axis 10 are provided on the outer peripheral edge of all or part of the heat absorbing fins 17. Further, all or part of the heat absorbing fins 17 and the heat dissipating fins 14 are provided with plate-like radial projections 19 and 20 as shown in FIGS. 8, 9, 10, and 11. The protrusion 19 is a plate-like fin with a slit cut into a claw shape, and the protrusion 20 is a plate-like portion provided with a raised convex.

A circular partition plate 21 is provided between the evaporating section 15 and the condensing section 12, with the heat pipe 11 inserted thereinto, to partition the two sections.

The rotor 22 having the above structure has its evaporator 15 and heat absorption fins 17 housed in a cylindrical air chamber 23, and a bearing 9 is fixed to the air chamber 23 and rotatably disposed therein. The cylindrical wall of the air chamber 23 has an air inlet hole 24 tangentially connected to the air pipe 5 (FIG. 1), and one end has an air outlet hole 25 connected to the air intake pipe 7 of the engine. Equipped with
The other end face is provided with a circular opening 26. The peripheral edge of the circular opening 26 and the partition plate 21 of the rotor 22 are slidable via a packing 27 on the peripheral edge of the circular opening 26.

The aftercooler of this invention having the above structure operates as follows. That is, when the engine 1 is operated, the intake air is purified by the air cleaner, becomes high pressure and high temperature by the compressor 4 of the turbocharger 3, passes through the air pipe 5, enters the air chamber 23 from the air inlet hole 24 of the aftercooler 6, is cooled, and enters the air outlet hole. 25, it reaches the air intake pipe 7 of the engine and is sent to the engine 1 as combustion air. Aftercooler 6
The air entering the air chamber 23 touches the heat absorption fins 17 and the evaporation part 15 of the heat pipe 11 and loses heat, but at this time, the blades 18 or protrusions 19, 20 attached to the heat absorption fins 17 promote heat absorption. . The airflow collides with the heat pipe while flowing from the air inlet hole 24 at the periphery of the air chamber to the air outlet hole 25 at the center and comes into contact with the heat absorption fins, so that the wind force becomes the rotational force of the rotor 22. rotates. In this case, the blades 18 attached to the outer periphery of the heat-absorbing fins 17 or the protrusions 19 and 20 attached to the plate-shaped portion act to collide airflow and strengthen the rotational force, so that the rotor 22 rotates faster. Moreover, if the air inlet hole 24 is provided in the tangential direction, even more effective rotational force can be generated. Inside the heat pipe, the absorbed heat is transferred from the evaporating section 15 to the condensing section 12 and radiated, but since the heat pipe 11 and the heat dissipating fins 14 are rotated by the rotational force mentioned above, they are always in contact with the flow of cooling air. Therefore, the heat dissipation effect is significant. Since the laminated heat dissipation fins 14 having a central opening are rotating, the cooling air in contact with the heat dissipation fins 14 is given a centrifugal force between the layers of each heat dissipation fin and is discharged in the radial direction, resulting in fresh air. It will flow freely through the central opening. Such air flow is controlled by the blades 13a or protrusions 19, 20 attached to the heat dissipation fins.
, which increases air flow rate and improves heat dissipation effect. Note that the partition plate 21 is the air chamber 23.
The rotor 22 is rotatable and the air chamber 23 forms part of the wall of the clean air intake passage from the air cleaner 2 to the air intake pipe 7 of the engine. There is.

The turbocharger aftercooler of this invention operates as described above. The structure has a plurality of heat pipes rotatably arranged around an axis, and the evaporation part of the heat pipe is placed in the passage of the air to be cooled. It is not necessary to set up a complicated large heat transfer area in the passage, and moreover, many heat pipes can be arranged together, so the size can be reduced. Furthermore, since the heat pipe and the heat absorption/radiation fins attached to it are rotated by the speed of the air to be cooled without using any other power, an electric blower fan can be installed like a general air-cooled heat exchanger, A sufficient amount of air can be obtained in the heat radiating section without providing a water circulation pump unlike a water-cooled heat exchanger. Therefore, this idea is a small and lightweight aftercooler with high heat exchange efficiency.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the mounting relationship of the turbocharger aftercooler of this invention, FIG. 2 is a perspective view of one embodiment of the turbocharger aftercooler of this invention, and FIG. 3 is a longitudinal sectional view thereof. Fourth
The figure is a partial side view showing the radiation fin and the blade attached thereto, and FIG. 5 is a plan view thereof. Figure 6 is a partial plan view showing the blades on the outer periphery of the heat-absorbing fin;
The figure is a side view thereof. Figure 8 is a partial plan view showing the claw-like protrusions of the heat absorption fin and the heat radiation fin;
Figures A and B are its side views. FIG. 10 is a partial plan view showing a convex projection which is another embodiment of the projection of the heat absorption fin and the heat radiation fin, and FIG. 11 is a side view thereof. 3...Turbo charger, 6...Aftercooler, 10...Shaft, 11...Heat pipe, 14...
...Radiation fin, 13a...Radiation fin blade, 1
7... Endothermic fin, 18... Endothermic fin blade,
19...nail-like process, 20...convex process, 21...
Partition plate, 23... air chamber, 24... air inlet hole,
25...Air outlet hole.

Claims (1)

[Claims for Utility Model Registration] (1) A plurality of heat pipes are arranged in parallel around a freely rotatable shaft supported by a bearing, and a central opening is provided in the condensing section at one end of the heat pipes. The heat pipes are connected to each other, and a plurality of plate-shaped heat dissipation fins perpendicular to the heat pipes are stacked and attached, and the evaporation section at the other end of the heat pipes is provided with a central opening, and the heat pipes are connected to each other. A plurality of perpendicular plate-shaped heat absorption fins are stacked and attached to the heat pipe, and a circular partition plate that is inserted into each heat pipe is attached between the evaporation section and the condensation section, and each of the above members is fixed integrally. to form a rotor, and an air inlet hole is formed in the cylindrical wall surface, and an air outlet hole is formed in the center of one end surface.
and an air chamber having a circular opening is provided at the center of the other end face, the evaporation part of the rotor is accommodated in the air chamber, and the peripheral edges of both the partition plate and the circular opening of the air chamber are slidably in contact with each other. Aftercooler for turbocharger. (2) The aftercooler for a turbocharger according to claim 1, wherein the central opening edge of a portion of the heat dissipation fin is shaped like an axial flow vane. (3) The aftercooler for a turbocharger according to claim 1, which is provided with rotating blades that receive tangential wind pressure on a part or all of the outer peripheral edge of the heat-absorbing fins. (4) The aftercooler for a turbocharger according to claim 1, which has a plurality of radial protrusions on all or part of the plate-like portions of the heat radiation fins and the heat absorption fins.