JPH0571679U - Intercooler - Google Patents

Abstract

(57) [Abstract] [Purpose] To reduce the noise generated in the intercooler that cools the high-temperature, high-pressure intake air supplied to the engine from the supercharger. [Composition] Intake inlet chamber 1 on both sides of water-cooled core 3
2 and the intake / outlet chamber 13 are provided, and at least one of the chambers is provided with flow distribution plates 16 and 17 to divide into small spaces 18 and 19. The intake air that enters through the intake inlet 14 or the intake air that exits through the intake outlet 15 undergoes a volume change limited by the small space 18 or 19, so the level of sound generated is low.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to an intercooler for intermediately cooling pressurized hot intake air sent from a supercharger to an engine.

[0002]

[Prior Art]

 In this type of intercooler, a water-cooled core for heat exchange is installed in the middle part of the case, as shown in, for example, Japanese Patent Laid-Open No. 207995/1988. Generally, an intake air outlet chamber is provided, and an intake air inlet and an intake air outlet are provided in this chamber. However, in the intake inlet chamber and the intake inlet, or between the intake outlet chamber and the intake outlet, the change in the cross-sectional area of the flow is remarkable, and a sudden change in the volume of the intake occurs here, generating noise. The noise on the entrance room side is particularly loud.

[0003]

[Problems to be solved by the device]

 An object of the present invention is to prevent the generation of noise due to the above-mentioned volume change and also to prevent the generation of noise due to the vibration of the case by improving the rigidity of the case.

[0004]

[Means for Solving the Problems]

 Means for solving the problems in the present invention is an intercooler in which an intake inlet chamber is connected to one side of a water-cooled heat exchange core and an intake outlet chamber is connected to the other side of the water-cooled heat exchange core. It is characterized in that a plurality of flow dividing plates are provided on at least one side in parallel with the intake air circulation direction.

[0005]

[Action]

 Due to the above means, the intake inlet chamber and the intake outlet chamber are divided into small spaces by the flow dividing plate, and the intake air expands or contracts in the range of each small space at the time of inflow or outflow, so that the volume changes in the large space. Even if the rate of change is the same, the noise level is low and the overall noise level is low. Further, the intake inlet chamber and the intake outlet chamber are reinforced by the flow dividing plate and are less likely to vibrate, and the generation of noise due to the vibration is prevented.

[0006]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 is an intercooler of the present invention, and reference numeral 2 is a case thereof, and as shown in FIG. 2, it has parallelogram-shaped planar end walls 2a and 2b and side walls 2c and 2d. As shown in FIG. 1 and FIG. 3, the heat exchange core 3 has a U-shaped hollow cooling water passage 5 having two legs separated by an intermediate separating portion 4, and a cooling water passage 5 in a direction orthogonal to the separating portion 4. A plurality of corrugated plate endothermic plates 6 having a top side are alternately stacked. A cooling water inlet chamber 7 is connected to one leg of each cooling water passage 5, and a cooling water outlet chamber 8 is connected to the other leg of each cooling water passage 5. The outlet pipe 10 is connected.

On both sides of the core, the distance from the side wall 2c or 2d is narrowed on the cooling water inlet chamber 7 side. An intake inlet chamber 12 having a substantially triangular shape and an intake outlet chamber 13 that widens on the cooling water outlet chamber 8 side are provided, and an intake inlet 14 and an intake outlet 15 are opened in the end walls 2a and 2b and are connected to an intake passage (not shown). It

Then, inside the intake inlet chamber 12 and the intake outlet chamber 13, three flow dividing plates 16, 17 are provided on the same plane as the intermediate cooling water passage 5 across the respective chambers 12, 13. Are arranged and welded to the inner surface of the case 2 at the welded portion W. Therefore, the intake inlet chamber 12 and the intake outlet chamber 13 are divided into four small spaces 18 and 19 by the flow distribution plates 16 and 17 extending in the intake air flow direction.

With the above-described configuration, the high-temperature, high-pressure intake air that flows in from the supercharger (not shown) is discharged from the intake inlet 14 toward the intake inlet chamber 12 and the core 3 having a large volume. Since the intake inlet chamber 12 is divided into the small spaces 18, 18, ..., The amount of change in energy due to the volume change is small, so the level of sound generated is low, and even if the sounds in each small space are combined, the level is relatively low. It will not be expensive. The sound level is also suppressed to a low level because it is divided into the small spaces 19, 19 ... Also on the intake outlet 15 side. Further, since the entire side walls 2c, 2d and part of the end walls 2a, 2b of the case 2 are reinforced by the flow distribution plates 16 and 17, vibration due to fluctuation of internal pressure is prevented and may be caused by the vibration. Noise is also prevented. FIG. 4 is a graph comparing the noise levels with and without the flow dividing plates 16 and 17, in which the horizontal axis represents the rotation speed of the supercharging pump and the vertical axis represents the noise level. Curve B shows that of the invention with the flow distributors 16,17. As is apparent from this graph, the noise level of the curve B is considerably lower than that of the curve A, and even if the rotation speed changes, the change in the volume is gentle and no unpleasant sound is produced.

Even if the flow dividing plate is provided only in one of the intake inlet chamber 12 and the intake outlet chamber 13, a corresponding noise reduction effect can be obtained. Further, the flow dividing plates 16 and 17 may be provided at intermediate positions without being placed on the same plane as the cooling water passage 5.

[0011]

[Effect of the device]

 INDUSTRIAL APPLICABILITY As described above, the present invention has an excellent effect that noise can be reduced by a simple means of providing a flow dividing plate in the intake inlet chamber or the intake outlet chamber.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of an embodiment of the present invention.

[FIG. 2] Similarly, a cross-sectional view

3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a graph showing a noise generation state.

[Explanation of sign]

 2 Case 3 Heat exchange core 12 Intake inlet chamber 13 Intake outlet chamber 14 Intake inlet 15 Intake outlet 16, 17 Flow distribution plate 18, 19 Small space

Claims (2)

[Scope of utility model registration request] 1. An intercooler in which an intake inlet chamber is connected to one side of a water-cooled heat exchange core and an intake outlet chamber is connected to the other side of the water-cooled heat exchange core. An intercooler characterized in that a plurality of flow dividing plates are provided parallel to the flow direction. 2. The intercooler according to claim 1, wherein the intake inlet chamber and the intake outlet chamber have a configuration in which the width is gradually reduced from the intake inlet side or the intake outlet side toward the other side.