JP6038437B2 - Oil cooler for vehicles - Google Patents

Description

  The present invention relates to a vehicle heat exchanger that performs heat exchange between a first liquid and a second liquid, and in particular, the heat exchange efficiency between the first liquid and the second liquid in the vehicle heat exchanger is conventionally increased. It is related to the technology to increase in comparison.

  As shown in Patent Documents 1 to 3, for example, as shown in Patent Documents 1 to 3, a first inflow port through which a first liquid flows in, a first outflow port through which the first liquid flows out, and a second liquid are included in one type of vehicle heat exchanger. A second inflow port that flows in and a second outflow port from which the second liquid flows out; and a plurality of layered first heat exchange chambers that directly communicate with the first inflow port and the first outflow port, respectively. A plurality of layered second heats stacked between the first heat exchange chambers adjacent to the plurality of first heat exchange chambers and directly communicating with the second inlet and the second outlet, respectively. Some have an exchange chamber and perform heat exchange between the first liquid and the second liquid. For example, an oil cooler 100 that cools hydraulic oil (ATF: hereinafter referred to as oil) used in an automatic transmission as shown in FIG.

  In FIG. 6, the oil cooler 100 includes a first inlet 100a into which the oil flows in, a first outlet 100b through which the oil flows out, and a second inlet 100c into which cooling water for cooling the oil flows. And a second outlet 100d through which the cooling water flows out, a plurality of layered first heat exchange chambers (not shown) that directly communicate with the first inlet 100a and the first outlet 100b, respectively. In the state adjacent to the first heat exchange chamber, a plurality of layered first layers (not shown) are stacked between the first heat exchange chambers and directly communicate with the second inlet 100c and the second outlet 100d, respectively. 2 heat exchange chambers, for example, the heat of the oil is transmitted to the cooling water to cool the oil. In FIG. 6, the one-dot chain line arrow virtually indicates the flow of the oil that flows in from the first outlet 100 b in the first heat exchange chamber in the oil cooler 100 when the oil that has flowed in from the first inlet 100 a. The arrow of the two-dot chain line virtually shows the flow of the cooling water flowing out from the second outlet 100d in the second heat exchange chamber in the oil cooler 100 when the cooling water introduced from the second inlet 100c flows. ing.

  An arrow A shown in FIG. 6 indicates the upper side of the vehicle, that is, the upper side in the vertical direction when the oil cooler 100 is mounted on the vehicle. In the oil cooler 100, when the oil cooler 100 is mounted on the vehicle, the first inflow port 100a is arranged on the upper side in the vertical direction from the first outflow port 100b, and the second inflow port 100c is from the second outflow port 100d. It is arranged on the upper side in the vertical direction.

JP 2009-52849 A Japanese Patent Laid-Open No. 06-341786 Japanese Patent Laid-Open No. 06-272558

  By the way, in the oil cooler 100 as described above, bubbles may be mixed in the oil flowing in from the first inlet 100a and the cooling water flowing in from the second inlet 100c. In this case, when the oil flowing in from the first inlet 100a in the first heat exchange chamber in the oil cooler 100 flows out of the first outlet 100b, bubbles mixed in the oil are changed to the first heat exchange chamber. 1 In the heat exchange chamber, the oil tends to float upward as opposed to the oil flow flowing downward in the vertical direction, so that bubbles mixed in the oil are sufficiently removed from the first outlet 100b in the oil flow. Not discharged. Also, in the second heat exchange chamber in the oil cooler 100, since the second inlet 100c is arranged on the upper side in the vertical direction from the second outlet 100d, bubbles mixed in the cooling water as described above. Is not sufficiently discharged from the second outlet 100d by the flow of the cooling water.

  For this reason, residual bubbles 110 that have not been discharged from the first outlet 100b and the second outlet 100d into the first heat exchange chamber and the second heat exchange chamber in the oil cooler 100 are transferred to the first heat exchange chamber and the second heat exchange chamber. There is a drawback that the heat exchange area in the room is substantially reduced and the heat exchange efficiency between the oil in the oil cooler 100 and the cooling water is lowered. In FIG. 6, the dashed-dotted ellipse virtually shows the residual bubbles 110a remaining in the first heat exchange chamber, and the alternate long and two short dashes line ellipse virtually shows the residual bubbles 110b remaining in the second heat exchange chamber. It shows.

  The present invention has been made against the background of the above circumstances. The object of the present invention is to suitably discharge bubbles from the first outlet and the second outlet to suppress a decrease in heat exchange efficiency. An object of the present invention is to provide a vehicular heat exchanger.

To achieve this object, the gist of the present invention is that: (a) a first inlet into which oil is introduced, a first outlet from which the oil flows out, and a second stream into which cooling water is introduced. An inlet and a second outlet from which cooling water flows out; a plurality of layered first heat exchange chambers directly communicating with the first inlet and the first outlet, respectively; and a plurality of first heats A plurality of layered second heat exchange chambers stacked between the first heat exchange chambers adjacent to the exchange chamber and directly communicating with the second inflow port and the second outflow port, respectively, An oil cooler for a vehicle that exchanges heat between oil and the cooling water , (b) the first heat exchange chamber and the second heat exchange chamber are arranged along a vertical direction, and (c) The first outlet is disposed above the first inlet, and (d) the second outlet is a front (E) the first outlet and the second outlet are provided on the vehicle upper side, and (f) the first inlet and the second inlet are: It is to be provided on the vehicle lower side.

According to the vehicle oil cooler of the present invention, (b) the first heat exchange chamber and the second heat exchange chamber are arranged along the vertical direction, and (c) the first outlet is the first outlet. (D) the second outlet is located above the second inlet, and (e) the first outlet and the second outlet are located above the vehicle. (F) The first inflow port and the second inflow port are provided on the vehicle lower side. Therefore, when the oil that has flowed in from the first inflow port in the first heat exchange chamber flows out of the first outflow port, bubbles that are mixed in the oil are in the upper part in the first heat exchange chamber. since lifted to the side, the bubble of the oil is discharged from suitably the first outlet port with the flow of the oil. In addition, when the cooling water that has flowed in from the second inflow port in the second heat exchange chamber flows out of the second outflow port, bubbles mixed in the cooling water are generated in the second heat exchange chamber. since lifted to the upper side, the bubble of the cooling water is discharged from the suitably the second outlet with the flow of the cooling water. As a result, air bubbles can be suitably discharged from the first outlet and the second outlet, so that residual bubbles remaining in the first heat exchange chamber and the second heat exchange chamber are reduced as compared with the prior art, A decrease in exchange efficiency can be suppressed.

It is an example of the block diagram explaining schematic structure of the cooling system mounted in the vehicle. It is the enlarged view to which the oil cooler shown in FIG. 1 was expanded. FIG. 3 is a side view of the oil cooler of FIG. 2 as viewed from the direction of the arrow III, and a cooling water inflow pipe that allows cooling water to flow into the oil cooler of FIG. It is the figure which abbreviate | omitted the water outflow pipe. FIG. 3 is a side view of the oil cooler of FIG. 2 as viewed from the direction of the arrow IV, and an oil inflow pipe that allows oil to flow into the oil cooler of FIG. FIG. It is a figure explaining the oil cooler of another Example, and is a figure corresponding to FIG. It is a figure explaining the problem of the conventional oil cooler.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following embodiments, the drawings are appropriately simplified or modified for easy understanding, and the dimensional ratios, shapes, and the like of the respective parts are not necessarily drawn accurately.

  FIG. 1 is a block diagram illustrating a schematic configuration of a cooling system 12 mounted on a vehicle 10. In FIG. 1, the cooling system 12 includes, for example, a radiator 14, a thermostat 16, a water pump 18, a heater core 20, and an oil cooler (vehicle heat exchanger) 22. 1 indicates the flow of the cooling water (second liquid) W, and the broken arrow indicates the hydraulic oil (ATF: hereinafter referred to as oil (first liquid) O) used in the automatic transmission 24. The flow is shown.

  The radiator 14 receives the cooling water W for the engine 26 flowing out from the outlet 26a of the water jacket of the engine 26 mounted on the vehicle 10 from the inlet 14a, cools the cooling water W by heat exchange with the outside air, and after cooling The cooling water W is discharged from the outlet 14 b to the inlet 16 a of the thermostat 16.

  The thermostat 16 closes the valve on the inlet 16a side of the thermostat 16 until, for example, the cooling water W reaches a predetermined temperature or higher, thereby preventing the cooling water W from flowing from the inlet 16a to the outlet 16b. On the other hand, the thermostat 16 opens the valve on the inlet 16a side, for example, when the cooling water W reaches a predetermined temperature or higher, allows the cooling water W to flow from the inlet 16a to the outlet 16b, and outputs the cooling water W to the outlet. It flows out from 16b to the water pump 18. Further, the thermostat 16 receives the cooling water W flowing through the bypass passage 26b of the water jacket of the engine 26 from the inlet 16c, and causes the cooling water W to flow out from the outlet 16b to the water pump 18. Further, the thermostat 16 receives the cooling water W via the heater core 20 from the inlet 16d, and causes the cooling water W to flow out from the outlet 16b to the water pump 18.

  The water pump 18 is connected to the engine 26, for example, and sucks the cooling water W through the radiator 14 and the thermostat 16, and supplies the cooling water W to the water jacket and the oil cooler 22 of the engine 26. Circulate.

  The heater core 20 receives the cooling water W flowing out from the outlet 26c of the water jacket of the engine 26, exchanges heat between the cooling water W and the air, and generates hot air.

  The oil cooler 22 is a round oil cooler as shown in FIGS. 1 and 2, and includes an oil inflow pipe 28 through which oil O flowing out from the automatic transmission 24 flows into the oil cooler 22, and the oil inflow pipe 28. The oil outflow pipe 30 that flows out the oil O that has flowed into the oil cooler 22 from the oil cooler 22 and the cooling water flow that flows the cooling water W that flows out from the outlet 26c of the water jacket of the engine 26 into the oil cooler 22 An inlet pipe 32, and a cooling water outlet pipe 34 that allows the cooling water W that has flowed into the oil cooler 22 from the cooling water inlet pipe 32 to flow out of the oil cooler 22, and the oil O introduced into the oil cooler 22; Heat is exchanged with the cooling water W. In the oil cooler 22, for example, during the warm-up of the automatic transmission 24, heat is transmitted from the coolant W warmed by the engine 26 to the oil O, and the oil O is warmed early, whereby the automatic transmission 24. Warm-up is promoted and fuel consumption is improved. On the other hand, after the warm-up, heat is transmitted from the oil O warmed by the automatic transmission 24 to the cooling water W, the oil O is cooled, and the automatic transmission 24 is cooled.

  As shown in FIGS. 3 and 4, the oil cooler 22 includes a cylindrical core body 36 in which an oil inflow pipe 28, an oil outflow pipe 30, a cooling water inflow pipe 32, and a cooling water outflow pipe 34 are attached in a liquid-tight manner. And a disk-shaped base plate 38 fixed to the automatic transmission 24 for fixing the core body 36 to the automatic transmission 24 in a fixed position.

  As shown in FIGS. 3 and 4, the core main body 36 includes a first inflow port 28 a formed in the oil inflow pipe 28 and a first flow formed in the oil outflow pipe 30 in the core main body 36. A plurality of laminar first heat exchange chambers 40 communicating directly with the outlet 30a, a second inlet 32a formed in the cooling water inflow pipe 32, and a second outlet formed in the cooling water outflow pipe 34 A plurality of layered second heat exchange chambers 42 that communicate directly with 34a are alternately formed in the stacking direction. 3 and 4 indicate a part of a flat plate-like wall portion 36a formed in the core body 36 to form the first heat exchange chamber 40 and the second heat exchange chamber 42. It is. As shown in FIGS. 3 and 4, the diameter B2 of the second outlet 34a is larger than the diameter B1 of the first outlet 30a.

  The arrow C1 shown in FIGS. 2 to 4 indicates the upper side of the vehicle, that is, the upper side in the vertical direction when the oil cooler 22 is mounted on the vehicle. As shown in FIGS. 3 and 4, in the oil cooler 22, the first heat exchange chamber 40 and the second heat exchange chamber 42 are arranged along the vertical direction, that is, parallel to the vertical direction, The 1 outflow port 30a is arrange | positioned above the 1st inflow port 28a, and the 2nd outflow port 34a is arrange | positioned above the 2nd inflow port 32a.

  As shown in FIG. 3, a first hose 44 made of, for example, synthetic rubber that can be elastically deformed is fitted into the oil inflow pipe 28 and the oil outflow pipe 30, and is fixed by a position fixing belt 46. Further, the oil O that has flowed out of the first heat exchange chamber 40 of the oil cooler 22 is sent into the automatic transmission 24 through the first hose 44, and the oil O that has been fitted into the oil outflow pipe 30. The diameter D1 of the hole 44a of the 1 hose 44 is larger than the diameter B1 of the first outlet 30a.

  As shown in FIG. 4, a second hose 48 made of, for example, synthetic rubber that can be elastically deformed is fitted into the cooling water inflow pipe 32 and the cooling water outflow pipe 34, and is fixed by a position fixing belt 50. The cooling water W that has flowed out of the second heat exchange chamber 42 of the oil cooler 22 is sent to the inlet 16d of the thermostat 16 via the second hose 48, and is fitted to the cooling water outflow pipe 34. The diameter D2 of the hole 48a of the second hose 48 is larger than the diameter B2 of the second outlet 34a.

  Here, in the oil cooler 22, the state in the 1st heat exchange chamber 40 and the 2nd heat exchange chamber 42 in case the bubble is mixed in the oil O and the cooling water W is demonstrated using FIG. 2 thru | or FIG. To do. 2 to 4, a dashed-dotted arrow O1 virtually indicates the flow of the oil O flowing out from the first outlet 30a in the first heat exchange chamber 40 when the oil O introduced from the first inlet 28a flows. An arrow W1 indicated by a two-dot chain line virtually indicates the flow of the cooling water W flowing out from the second outlet 34a in the second heat exchange chamber 42 by the cooling water W flowing in from the second inlet 32a. is there.

  As shown in FIGS. 2 and 3, when the oil O that has flowed in from the first inflow port 28 a in the first heat exchange chamber 40 flows out from the first outflow port 30 a, the oil O in the first heat exchange chamber 40 Flows toward the upper side in the first heat exchange chamber 40, and bubbles mixed in the oil O also float to the upper side in the first heat exchange chamber 40. The bubbles in O are suitably discharged from the first outlet 30a, and the remaining bubbles remaining in the first heat exchange chamber 40 are reduced as compared with the conventional oil cooler. Moreover, the dashed-dotted ellipse shown in FIG. 2 virtually shows the bubble 52 that has floated to the upper side of the first heat exchange chamber 40 along with the flow of the oil O.

  Similarly, when the cooling water W that has flowed in from the second inflow port 32a in the second heat exchange chamber 42 flows out from the second outflow port 34a, the cooling water W in the second heat exchange chamber 42 becomes its second. The air bubbles flowing toward the upper side in the heat exchange chamber 42 and the bubbles mixed in the cooling water W also float to the upper side in the second heat exchange chamber 42, so that the inside of the cooling water W together with the flow of the cooling water W Are suitably discharged from the second outlet 34a, and the residual bubbles remaining in the second heat exchange chamber 42 are reduced as compared with the conventional oil cooler. In addition, the two-dot chain ellipse shown in FIG. 2 virtually indicates the bubbles 54 that have floated to the upper side of the second heat exchange chamber 42 along with the flow of the cooling water W.

  As described above, according to the oil cooler 22 of the present embodiment, the first heat exchange chamber 40 and the second heat exchange chamber 42 are arranged along the vertical direction, and the first outlet 30a is the first inlet. The second outflow port 34a is disposed on the upper side from the second inflow port 32a. Therefore, when the oil O that has flowed in from the first inflow port 28a in the first heat exchange chamber 40 flows out of the first outflow port 30a, bubbles mixed in the oil O are mixed in the first heat exchange chamber 40. Therefore, the bubbles 52 of the oil O are preferably discharged from the first outlet 30a together with the flow of the oil O. In addition, when the cooling water W that has flowed in from the second inlet 32a in the second heat exchange chamber 42 flows out of the second outlet 34a, bubbles mixed in the cooling water W are converted into the second heat exchange chamber. Since it floats upward in 42, the bubble 54 of the cooling water W is suitably discharged | emitted from the 2nd outflow port 34a with the flow of the cooling water W. Accordingly, the bubbles 52 and 54 can be suitably discharged from the first outlet 30a and the second outlet 34a, so that the remaining bubbles remaining in the first heat exchange chamber 40 and the second heat exchange chamber 42 are reduced as compared with the conventional case. And the fall of heat exchange efficiency can be controlled.

  Further, according to the oil cooler 22 of the present embodiment, the oil hose pipe 30 is fitted with the first hose 44 that sends the oil O that has flowed out from the plurality of first heat exchange chambers 40 into the automatic transmission 24. The diameter D1 of the hole 44a of the first hose 44 is larger than the diameter B1 of the first outlet 30a. For this reason, the air bubbles 52 mixed in the oil O discharged from the first outlet 30 a are preferably sent to the outside through the first hose 44 without remaining in the oil outlet pipe 30.

  Further, according to the oil cooler 22 of the present embodiment, the cooling water outlet pipe 34 is fitted with the second hose 48 that sends the cooling water W that has flowed out from the plurality of second heat exchange chambers 42 to the inlet 16d of the thermostat 16. The diameter D2 of the hole 48a of the second hose 48 is larger than the diameter B2 of the second outlet 34a. For this reason, the air bubbles 54 mixed in the cooling water W discharged from the second outlet 34 a are preferably sent to the outside via the second hose 48 without remaining in the cooling water outflow pipe 34.

  Further, according to the oil cooler 22 of the present embodiment, the diameter B2 of the second outlet 34a is larger than the diameter B1 of the first outlet 30a. For this reason, in the 1st heat exchange chamber 40, it can remain in the 1st heat exchange chamber 40 so that the bubble 52 mixed in the oil O may not go into the automatic transmission 24.

  Another embodiment of the present invention will be described. In the following other embodiments, portions common to the embodiments are denoted by the same reference numerals and description thereof is omitted.

  The oil cooler 60 of the present embodiment is substantially the same as the oil cooler 22 of the first embodiment except for the other points, unlike the round oil cooler 22 of the first embodiment, in that the oil cooler 60 is a square oil cooler. It is. FIG. 5 is a front view of the oil cooler 60 attached to the automatic transmission 24 and corresponds to FIG. 2 of the first embodiment.

  An arrow C2 shown in FIG. 5 indicates the upper side of the vehicle, that is, the upper side in the vertical direction when the oil cooler 60 is mounted on the vehicle. In the oil cooler 60, like the oil cooler 22 of the first embodiment, the first heat exchange chamber 40 and the second heat exchange chamber 42 are arranged along the vertical direction, that is, parallel to the vertical direction. The 1 outflow port 30a is arrange | positioned above the 1st inflow port 28a, and the 2nd outflow port 34a is arrange | positioned above the 2nd inflow port 32a.

  In the oil cooler 60 configured as described above, even if bubbles are mixed in the oil O and the cooling water W, the bubbles 52 mixed in the oil O are the same as in the oil cooler 22 of the first embodiment. In the second heat exchange chamber 42, the bubbles 54 are preferably discharged from the first outlet 30 a together with the flow of the oil O and float in the upper side in the first heat exchange chamber 40, and are mixed in the cooling water W. It floats up and is suitably discharged | emitted from the 2nd outflow port 34a with the flow of the cooling water W. For this reason, according to this square oil cooler 60, substantially the same effect as the oil cooler 22 of the first embodiment can be obtained.

  As mentioned above, although the Example of this invention was described based on drawing, this invention is applied also in another aspect.

  For example, although the oil coolers 22 and 60 of the present embodiment are round and square oil coolers, the oil coolers 22 and 60 of the present embodiment can be adapted to various shapes.

  In addition, the oil coolers 22 and 60 of the present embodiment are hydraulic oil (ATF) heat exchangers used in the automatic transmission 24 that performs heat exchange between the oil O and the cooling water W. The present invention can be applied to any stacked heat exchanger for a vehicle that can exchange heat between the first liquid and the second liquid. For example, a stacked vehicle heat exchanger in which the first liquid is cooling water (or engine oil) and the second liquid is engine oil (or cooling water) may be used.

  Although not illustrated one by one, the present invention can be implemented in variously modified and improved modes based on the knowledge of those skilled in the art.

22, 60: Oil cooler (vehicle heat exchanger)
28a: 1st inflow port 30a: 1st outflow port 32a: 2nd inflow port 34a: 2nd outflow port 40: 1st heat exchange chamber 42: 2nd heat exchange chamber O: Oil (1st liquid)
W: Cooling water (second liquid)

Claims (1)

A first inlet through which oil flows in and a first outlet through which the oil flows out;
A second inlet through which cooling water flows in and a second outlet through which the cooling water flows out;
A plurality of layered first heat exchange chambers directly communicating with the first inlet and the first outlet, respectively;
A plurality of layered second heat exchange layers stacked between the first heat exchange chambers adjacent to the plurality of first heat exchange chambers and directly communicating with the second inflow port and the second outflow port, respectively. A vehicle oil cooler that exchanges heat between the oil and the cooling water ,
The first heat exchange chamber and the second heat exchange chamber are arranged along the vertical direction,
The first outlet is disposed on the upper side of the first inlet,
The second outlet is disposed on the upper side of the second inlet,
The first outlet and the second outlet are provided on the vehicle upper side,
The vehicle oil cooler, wherein the first inlet and the second inlet are provided on a vehicle lower side.

Images