JP2006336575A - Radiator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent reduction of cooling performance by preventing miniaturization of a heat radiating core and preventing reduction of amount of passing flow of cooling water into the heat radiating core. <P>SOLUTION: Each radiator tank 3, 5 on the upstream side and the downstream side are arranged on both sides of the heat radiating core 1. A partitioning member 17 having a cylindrical shape is provided in an upper part of the upstream side radiator tank 3 to introduce a part of cooling water introduced from a cooling water introducing pipe 15 into the upstream side radiator tank 3 into a gas-liquid separation space 25 in the partitioning member 17 through an inlet 19 of the gas-liquid separation space. As for cooling water after introduction, gas is separated from liquid in a process in which the cooling water flows downward while turning in the partitioning member 17, and liquid in the cooling water flows out into a cooling water distribution space 11 from a cooling water discharge port 17b in a lower part and flows into the heat radiating core 9 together with cooling water flowing into the cooling water distribution space 11 from an inlet 21 of the cooling water distribution space in the cooling water introducing pipe 15. Air after separation flows into an external cooling water storage tank 35 through an air vent pipe 33 in an upper part. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a radiator provided in a cooling system that draws heat from a heat source by passing a cooling medium and radiates heat to the outside air.

  As an example of a conventional radiator, for example, there is one described in Patent Document 1 below. In this structure, an upstream radiator tank and a downstream radiator tank are integrally provided on the left and right sides of the heat dissipating core, and a reservoir tank is integrally provided on the heat dissipating core.

The cooling water that has flowed into the upstream radiator tank described above flows into the heat radiating core, radiates heat, and then flows out of the radiator through the downstream radiator tank. Here, the air accumulated in the upper part of the upstream radiator tank passes through a hole provided in the shielding plate and escapes to the upper reservoir tank, whereby gas-liquid separation is performed.
JP 2002-38945 A

  In the conventional structure, the reservoir tank is integrated at the top of the heat dissipating core. However, when installing a radiator in a limited space such as the engine room of an automobile, the heat dissipating core must be made smaller by integrating the reservoir tank. As a result, there is a problem that the cooling performance is lowered. In addition, since the upper part of the upstream radiator tank communicates with the reservoir tank, a part of the cooling water flowing into the upstream radiator tank does not flow into the heat radiating core but flows into the reservoir tank and is not cooled. There is a problem that the cooling performance is lowered.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to prevent the heat dissipation core from being reduced in size and to prevent a decrease in the flow rate of the cooling medium to the heat dissipation core, thereby improving the cooling performance.

  The present invention provides a radiator provided in a cooling system that draws heat from a heat source by passing a cooling medium and dissipates heat to the outside air, and a heat dissipating core through which the cooling medium flows and a cooling medium inlet side of the heat dissipating core. An upstream radiator tank that communicates with a downstream radiator tank that communicates with a cooling medium outlet side of the heat dissipating core, and a cylindrical partition member is accommodated in the upstream radiator tank. A cooling medium inflow direction into the upstream radiator tank is formed by dividing the inside of the radiator tank into two spaces and introducing a cooling medium introduction port for introducing a part of the cooling medium flowing into the upstream radiator tank into the partition member. And the cooling medium introduced into the partition member is upstream of the outside of the partition member. The cooling medium discharge port that discharges into the radiator tank is opened at a position off the extended line in the cooling medium inflow direction to the upstream side radiator tank, and an external cooling medium storage installed outside is provided above the partition member. The main feature is the connection of the air vent piping connected to the tank.

  According to the present invention, a cylindrical partition member is accommodated in the upstream side radiator tank so as to have a gas-liquid separation function. Therefore, a reservoir tank for performing gas-liquid separation is separately integrated on the upper part of the heat radiating core. The external cooling medium storage tank that is separately provided does not need to have a gas-liquid separation function, and can simply be supplied with the cooling medium for the inflow of air into the system. Since there is no need to integrate the reservoir tank, the heat dissipation core can be enlarged and the cooling performance can be improved.

  In addition, the cooling medium passing through the cylindrical partition member having the gas-liquid separation function also flows from the upstream radiator tank to the heat radiating core after being discharged from the cooling medium discharge port, and thus flows into the upstream radiator tank. Since all the cooling medium passes through the heat radiating core, the flow rate of the cooling medium to the heat radiating core can be prevented from being lowered, and the cooling performance can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view in which a part of the radiator showing the first embodiment of the present invention is omitted. This radiator is a cooling system that draws heat from a heat source by passing cooling water as a cooling medium and dissipates heat to the outside air, for example, a cooling system for cooling a heat source such as an engine mounted on an automobile. It is installed in the front part of the vehicle. The direction indicated by the arrow FR in FIGS. 1 and 2 is the front side of the vehicle when the radiator is mounted on an automobile.

  This radiator is provided with a heat radiating core 1 at the center, and an upstream radiator tank 3 and a downstream radiator tank 5 are integrally provided on one of both sides in the vehicle width direction.

  The heat dissipating core 1 has a structure in which a plurality of flat tubes 7 and heat dissipating fins 9 are alternately stacked in the vertical direction, and the tube 7 includes the cooling water distribution space 11 in the upstream radiator tank 3 and the downstream radiator tank 5. The cooling water merge space 13 is communicated with each other.

  A cooling water introduction pipe 15 into which cooling water that has cooled a heat source such as an engine mounted on the vehicle flows is connected to the upper right corner of the rear surface 3a corresponding to the rear side of the upstream radiator tank 3 in the vehicle. ing. A cylindrical partition member 17 that divides the inside of the upstream radiator tank 3 into two spaces is disposed in the upstream radiator tank 3 in front of the cooling water introduction pipe 15 in the cooling water introduction direction. The partition member 17 is disposed in the upstream side radiator tank 3 at the upper portion of the corner on the right side of the vehicle on the front side of the vehicle.

  As shown in FIG. 2, which is a plan view of the main part of FIG. 1, the cooling water introduction pipe 15 described above is a gas-liquid separation space inlet as a cooling medium introduction port on the right side in the vehicle width direction (left-right direction in FIG. 2). 19 and a cooling water distribution space inlet 21 having a passage cross-sectional area larger than that of the gas-liquid separation space inlet 19 on the left side, are separated by a separation wall 23.

  The gas-liquid separation space inlet 19 formed by the separation wall 23 communicates with the gas-liquid separation space 25 in the partition member 17 through the opening 17a. That is, the separation wall 23 has an extension 27 on the partition member 17 side, the end of the extension 27 is connected to the partition member 17, and the gas-liquid separation space inlet 19 is connected to the gas-liquid in the partition member 17. A lower wall 29 is provided to connect the lower end of the separation wall 23 and the side surface 3 b on the right side in the vehicle width direction of the upstream radiator tank 3 so as to communicate with the separation space 25.

  In addition, the upper wall of the gas-liquid separation space inlet 19 and the side wall on the right side in the vehicle width direction in the upstream radiator tank 3 are constituted by the outer walls (upper surface 3c and side surface 3b) of the upstream radiator tank 3.

  The gas-liquid separation space inlet 19 formed as described above is open on the extended line in the cooling water inflow direction into the upstream radiator tank 3 and in the cylindrical tangential direction of the partition member 17. The cooling water flowing into the gas-liquid separation space 25 flows downward while swirling along the inner peripheral surface of the partition member 17 and is separated in the process.

  A cooling water discharge port 17b for discharging the cooling water introduced into the gas-liquid separation space 25 into the upstream radiator tank 3 outside the partition member 17 is provided at the vehicle width direction inner side on the front side of the vehicle below the partition member 17. Provided. The cooling water discharge port 17b is opened in the cylindrical tangential direction of the partition member 17 so as to flow out of the partition member 17 forward in the flow direction of the swirl flow in the partition member 17 described above.

  The partition member 17 has a bottom wall 17 c at the lower part, but the upper part is closed by the upper surface 3 c of the upstream radiator tank 3. In addition, you may provide an upper wall separately also about an upper part. A communication hole 31 is formed in the upper surface 3 c corresponding to the upper part of the partition member 17, and the communication hole 31 is connected to an external cooling water storage tank 35 via an air vent pipe 33.

  The external cooling water storage tank 35 stores cooling water. One end of a cooling water return pipe 37 is connected to the external cooling water storage tank 35, and the other end of the cooling water return pipe 37 includes this radiator. Connect to the cooling system.

  The external cooling water storage tank 35 is installed at an appropriate position in the engine room at a position that is higher in the vertical direction than the radiator.

  Next, the operation will be described. When cooling water that has cooled a heat source such as an engine (not shown) reaches the cooling water introduction pipe 15 and flows into the cooling water distribution space 11 in the upstream-side radiator tank 3 from one cooling water distribution space inlet 21 separated by the separation wall 23. The cooling water is distributed and flows into the tubes 7 arranged in the vertical direction and flows out into the cooling water merge space 13 in the downstream side radiator tank 5 on the opposite side.

  Here, when the cooling water flows through the tubes 7, the cooling water is radiated to the outside via the heat radiation fins 9 and cooled, and then is supplied from a cooling water discharge pipe 38 provided at the lower portion of the downstream radiator tank 5 to a heat source (not shown) After cooling toward the heat source to cool the heat source, the path back to the radiator is followed again.

  On the other hand, part of the cooling water reaching the cooling water introduction pipe 15 flows through the other gas-liquid separation space inlet 19 separated by the separation wall 23 and flows into the gas-liquid separation space 25 from the opening 17 a of the partition member 17. To do. At this time, the gas-liquid separation space inlet 19 is open in the cylindrical tangential direction of the partition member 17 on the extended line in the cooling water inflow direction to the upstream radiator tank 3, and therefore the gas-liquid in the partition member 17 The cooling water flowing into the separation space 25 flows downward while swirling along the inner peripheral surface of the partition member 17, and in the process, high-density water is transferred to the outer periphery of the gas-liquid separation space 25 by centrifugal force. The gathered and low-density air gathers in the center of the gas-liquid separation space 25 and is gas-liquid separated.

  The cooling water flowing while turning downward along the inner peripheral surface in the partition member 17 flows out from the lower cooling water discharge port 17b to the cooling water distribution space 11. At this time, the cooling water discharge port 17b is a lower part not subjected to the dynamic pressure of the cooling water flowing into the cooling water distribution space 11 from the cooling water distribution space inlet 21, and on the extended line in the cooling water inflow direction to the upstream side radiator tank 3. Accordingly, the cooling water is smoothly discharged into the cooling water distribution space 11, and the gas-liquid separation is efficiently performed by the generation of an effective swirling flow in the partition member 17.

  The cooling water flowing out from the cooling water discharge port 17b into the cooling water distribution space 11 flows into each tube 7 together with the cooling water flowing into the cooling water distribution space 11 in the upstream side radiator tank 3 from the cooling water distribution space inlet 21. To dissipate heat and cool.

  On the other hand, the air that has been gas-liquid separated in the gas-liquid separation space 25 flows into the external cooling water storage tank 35 from the upper central communication hole 31 through the air vent pipe 33. And when air flows into the external cooling water storage tank 35 from the upstream side radiator tank 3, the inside of the cooling system system becomes negative pressure, and by the action of this negative pressure, the cooling water in the external cooling water storage tank 35 is The air flows out into the cooling system.

  As described above, according to the present embodiment, the cylindrical partition member 17 is accommodated in the upstream radiator tank 3 to provide the gas-liquid separation function. Therefore, a reservoir tank for performing the gas-liquid separation is separately provided. The external cooling water storage tank 35 provided separately does not need to be provided integrally with the heat dissipating core 1 and does not need to have a gas-liquid separation function. Since it suffices to supply it to the system, the size can be reduced, and accordingly, the heat dissipating core 1 when installed in the engine room can be enlarged and the cooling performance can be increased because the reservoir tank does not need to be integrated.

  In addition, after the cooling water flowing into the gas-liquid separation space 25 in the cylindrical partition member 17 having a gas-liquid separation function is discharged from the cooling water discharge port 17 b, the cooling water is transferred from the upstream radiator tank 3 to the heat radiating core 1. Therefore, since all the cooling water flowing into the upstream radiator tank 3 passes through the heat radiating core 1, a decrease in the flow rate of the cooling water to the heat radiating core 1 can be prevented, and the cooling performance can be improved. .

  Furthermore, this embodiment can reduce the water flow resistance as compared to the case where a gas-liquid separator is installed in series with the radiator separately from the radiator, so that the cooling water (not shown) that circulates the cooling water in the system of the cooling system. The power of the water circulation pump can be reduced.

  Further, the gas-liquid separation space inlet 19 is provided in the upper part of the partition member 17, and the cooling water discharge port 17 b is provided in the lower part of the partition member 17, so that the cooling water after the gas-liquid separation flows downward. It efficiently flows out from the cooling water discharge port 17b into the cooling water distribution space 11.

  Furthermore, the cooling water discharge port 17b is divided so that the cooling water introduced from the gas-liquid separation space inlet 19 swirls within the cylindrical shape of the partition member 17 and flows out of the partition member 17 forward in the flow direction of the swirling flow. Since the 17 cylindrical openings are opened in the tangential direction, the cooling water in the gas-liquid separation space 25 efficiently flows out into the cooling water distribution space 11.

  Further, by arranging the cylindrical partition member 17 on the upper side of the upstream radiator tank 3, the air after gas-liquid separation in the gas-liquid separation space 25 is transferred to the external cooling water storage tank 35 through the air vent pipe 33. It can be released efficiently.

  FIG. 3 is a perspective view in which a part of the radiator showing the second embodiment of the present invention is omitted, and FIG. 4 is a plan view of the main part of FIG. In this embodiment, a downstream side heat radiation core 39 having the same structure as that of the heat radiation core 1 is provided on the vehicle front side of the heat radiation core 1, and a downstream side and a downstream side of the heat radiation core 1 opposite to the upstream radiator tank 3. The intermediate radiator tank 40 connects the upstream side of the heat radiating core 39. A most downstream side radiator tank 41 is provided on the downstream side of the downstream side heat radiation core 39 opposite to the intermediate radiator tank 40.

  A cooling water discharge pipe 45 for flowing cooling water toward a heat source (not shown) is connected to the upstream radiator tank 3 side on the vehicle rear side at the lower part of the most downstream radiator tank 41. The cooling water discharge pipe 45 is disposed in a notch 47 provided in the lower part of the upstream radiator tank 3 and extends toward the rear of the vehicle. In addition, the configuration in which a cylindrical partition member 17 is provided in the upstream radiator tank 3 to provide a gas-liquid separation function is the same as in the first embodiment.

  As shown in FIGS. 3 and 4, in the cooling system provided with the downstream heat radiating core 39 in addition to the heat radiating core 1, a cylindrical partition member 17 having a gas-liquid separation function is provided in the upstream radiator tank 3. Thus, the same effect as that of the cooling system according to the first embodiment can be obtained.

  FIG. 5 is a perspective view in which a part of a radiator showing a third embodiment of the present invention is omitted, and FIG. 6 is a plan view of a main part of FIG. In this embodiment, in the same manner as in the second embodiment shown in FIGS. 3 and 4, the downstream radiator core 39 is provided in addition to the radiator core 1, and the upstream radiator tank 3 is connected to the vehicle front side. The upstream radiator tank 3 and the most downstream radiator tank 41 are integrated through a single partition wall 49, whereby the upstream radiator tank 3 is integrated with the second radiator tank 41. It is formed larger than that of the embodiment.

  As the upstream radiator tank 3 is made larger than that of the second embodiment, the cylindrical partition member 17 installed therein is also made larger than that of the second embodiment. . Other configurations are the same as those of the second embodiment.

  Thus, in the third embodiment, by integrating the upstream radiator tank 3 and the most downstream radiator tank 41, the upstream radiator tank 3 is made larger, and the partition portion 17 is also enlarged accordingly. And since the volume of the gas-liquid separation space 25 is enlarged, a gas-liquid separation function can be improved compared with 2nd Embodiment.

  In the second embodiment and the third embodiment described above, the example in which two heat dissipating cores are provided in the vehicle front-rear direction is shown, but the present invention is not limited to this, and three or more heat dissipating cores are provided. The cooling water may be arranged in the vehicle front-rear direction so that the cooling water flows in series.

It is the perspective view which abbreviate | omitted a part of radiator which shows the 1st Embodiment of this invention. It is a top view of the principal part of FIG. It is the perspective view which abbreviate | omitted a part of radiator which shows the 2nd Embodiment of this invention. It is a top view of the principal part of FIG. It is the perspective view which abbreviate | omitted a part of radiator which shows the 3rd Embodiment of this invention. It is a top view of the principal part of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Radiation core 3 Upstream radiator tank 5 Downstream radiator tank 17 Cylindrical partition member 17b Cooling water discharge port (cooling medium discharge port)
19 Gas-liquid separation space inlet (cooling medium inlet)
33 Air venting pipe 35 External cooling water storage tank (external cooling medium storage tank)
39 Downstream heat radiation core 40 Intermediate radiator tank 41 Downstream radiator tank

Claims (6)

  In a radiator provided in a cooling system that draws heat from a heat source by passing a cooling medium and dissipates heat to the outside air, a heat dissipating core through which the cooling medium flows, and an upstream side communicating with the cooling medium inlet side of the heat dissipating core Each having a radiator tank and a downstream radiator tank communicating with the cooling medium outlet side of the heat dissipating core. A cylindrical partition member is accommodated in the upstream radiator tank, and the inside of the upstream radiator tank is accommodated. A cooling medium introduction port that divides into two spaces and introduces a part of the cooling medium flowing into the upstream radiator tank into the partition member on an extension line in the cooling medium inflow direction to the upstream radiator tank. The partition member is opened in a tangential direction of the cylindrical shape, and the cooling medium introduced into the partition member is disposed outside the upstream side radiator. The cooling medium discharge port for discharging into the tank is opened at a position deviated from the extended line in the cooling medium inflow direction to the upstream radiator tank, and an external cooling medium storage tank installed outside at the upper part of the partition member A radiator that is connected to a piping for venting air that communicates with the radiator.   The downstream radiator tank is provided with a downstream heat radiating core into which a cooling medium flows from the downstream radiator tank, and a most downstream radiator tank into which the cooling medium flows from the downstream heat radiating core is provided. The radiator according to claim 1, wherein the tank and the upstream radiator tank are integrated via a partition wall.   3. The radiator according to claim 1, wherein the cooling medium introduction port is provided at an upper portion of the partition member, and the cooling medium discharge port is provided at a lower portion of the partition member.   The cylindrical shape of the partition member is such that the cooling medium introduced from the cooling medium inlet through the cooling medium discharge port swirls within the cylindrical shape of the partition member and flows out of the partition member forward in the flow direction of the swirling flow. The radiator according to claim 3, wherein the radiator is opened in a tangential direction.   The radiator according to any one of claims 1 to 4, wherein the cylindrical partition member is disposed on an upper portion of the upstream radiator tank.   The cooling medium introduced into the partition member is separated into gas and liquid by a swirling flow that swirls within the cylindrical shape of the partition member, and the liquid content is separated from the cooling medium discharge port into the upstream radiator tank outside the partition member. 6. The radiator according to claim 4, wherein air is discharged to the external cooling medium storage tank through the air vent pipe.

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