Reserve tank

Abstract

To provide a reserve tank capable of improving cooling performance.SOLUTION: A reserve tank 10 for reserving cooling water for a vehicle includes an approximately cylindrical gas-liquid separation part 11, an inflow port 12 provided in a side face of the gas-liquid separation part 11 for making the cooling water flow into the gas-liquid separation part, and an outflow port 13 provided in a bottom face of the gas-liquid separation part 11 for making the cooling water flow out of the gas-liquid separation part 11. A partition part 14 is provided in the gas-liquid separation part 11 for decoupling the cooling water flowing from the inflow port 12 to form a plurality of internal spaces S1, S2 in the gas-liquid separation part 11. A center position of the outflow port 13 deviates from a center position of each of swirl flows V1, V2 of the cooling water generated in the internal spaces S1, S2.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a reserve tank. [Background technology]

[0002] In the circulation path of the coolant that cools the internal combustion engine of a vehicle, a reserve tank is attached to the radiator that cools the coolant heated by the internal combustion engine to temporarily store the coolant. If the flow rate of the coolant is increased to improve the cooling performance, air bubbles generated in the circulation path may flow into the reserve tank or air bubbles may be generated in the reserve tank. If such air bubbles are circulated in the circulation path as they are, it will cause a decrease in cooling performance. Therefore, in order to improve the cooling performance, a technology has been developed to separate the coolant and air bubbles in the reserve tank.

[0003] For example, Patent Document 1 discloses a reserve tank capable of generating and removing air bubbles. In the reserve tank disclosed in Patent Document 1, a protrusion is provided inside the gas-liquid separation section so as to extend along the axis from the bottom wall of the gas-liquid separation section. In the reserve tank disclosed in Patent Document 1, a swirling flow is generated inside the gas-liquid separation section to centrifuge the air bubbles. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-169815 Summary of the Invention [Problem to be solved by the invention]

[0005] In the reserve tank disclosed in the above-mentioned Patent Document 1, when the flow rate is increased to improve the cooling performance, the flow rate of the swirling flow becomes faster from the inside to the outside. Therefore, the bottom of the swirling flow may come into contact with the tip of the protrusion, disturbing the swirling flow and generating air bubbles. In order to suppress this, it is effective to increase the capacity of the reserve tank and slow down the flow rate, but there is also a limit to the space inside the vehicle. Thus, the reserve tank disclosed in Patent Document 1 has room for improvement in terms of improving the cooling performance.

[0006] The present disclosure has been made in consideration of the above circumstances, and provides a reserve tank that can improve cooling performance. [Means for solving the problem]

[0007] The reserve tank according to the present disclosure comprises: A reserve tank for storing cooling water for a vehicle, A gas-liquid separation section having a substantially cylindrical shape; an inlet provided on a side surface of the gas-liquid separation unit for allowing cooling water to flow into the gas-liquid separation unit; an outlet provided on a bottom surface of the gas-liquid separation unit and through which cooling water flows out from inside the gas-liquid separation unit; a partition portion is provided inside the gas-liquid separation portion so as to divide the cooling water flowing in from the inlet, thereby forming a plurality of internal spaces in the gas-liquid separation portion; The center position of the outlet is a position offset from the center position of the swirling flow of cooling water generated in each internal space.

[0008] In the reserve tank according to the present disclosure, the cooling water from the inlet is divided, so that a swirling flow is generated while ensuring an appropriate flow rate, and the air bubbles can be separated in the gas-liquid separation section. Since the center position of the outlet is shifted from the center position of the swirling flow, the separated air bubbles can be prevented from flowing out of the outlet, thereby improving the cooling performance.

[0009] The partition may be provided so as to divide the cooling water flowing out from the outlet. With this configuration, the partition is disposed directly above the outlet, so that the center position of the outlet is shifted from the center position of the swirling flow, and separated bubbles can be prevented from flowing out from the outlet. This improves the cooling performance.

[0010] The partition may be provided so as to equally divide the cooling water flowing out from the outlet. With this configuration, the sizes of the outlets for the internal spaces of the gas-liquid separation unit are equal, so that the separated gas bubbles can be more effectively prevented from flowing out from the outlet. As a result, the cooling performance can be improved.

[0011] Furthermore, the partition may be provided so as to equally divide the cooling water flowing out from the inlet, and the center position of the outlet may be the same as the center of the gas-liquid separation section. With this configuration, the cooling water from the inlet flows equally into each internal space of the gas-liquid separation section, so that a swirling flow is generated while ensuring an appropriate flow rate, and the gas bubbles can be separated in the gas-liquid separation section. Since the size of the outlet for each internal space of the gas-liquid separation section is equal, the separated gas bubbles can be further prevented from flowing out from the outlet. Therefore, the cooling performance can be improved.

[0012] A shielding plate protruding upward from a bottom surface of the gas-liquid separation section may be provided between the inlet and the outlet. With this configuration, it is possible to prevent the cooling water that has flowed into the gas-liquid separation section from the inlet from flowing out directly from the outlet, thereby improving the cooling performance. Effect of the Invention

[0013] The present disclosure makes it possible to provide a reserve tank that enables improved cooling performance. [Brief description of the drawings]

[0014] [Figure 1] 1 is a plan view (xy plan view) of a reserve tank according to the first embodiment. [Diagram 2] 2 is a cross-sectional view (xz cross-sectional view) of the reserve tank according to the first embodiment. FIG. [Diagram 3] 2 is a cross-sectional view (yz cross-sectional view) of the reserve tank according to the first embodiment. FIG. [Figure 4] 13 is a plan view (xy plan view) of a reserve tank according to a modified example. FIG. [Diagram 5] 11 is a cross-sectional view (yz cross-sectional view) of a reserve tank according to a second embodiment. FIG. [Figure 6] 11 is a cross-sectional view (yz cross-sectional view) of a reserve tank according to a second embodiment. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, the present disclosure will be described through the embodiments of the invention, but the invention according to the claims is not limited to the following embodiments. In addition, all of the configurations described in the embodiments are not necessarily essential as means for solving the problems. For clarity of explanation, the following description and drawings are omitted and simplified as appropriate. In each drawing, the same elements are given the same reference numerals, and repeated explanations are omitted as necessary. Naturally, the right-handed xyz Cartesian coordinate system shown in the drawings is for the convenience of explaining the positional relationship of the components. Usually, the positive direction of the z axis is vertically upward, and the xy plane is a horizontal plane.

[0016] (Embodiment 1) <Reserve tank configuration> First, the reserve tank according to the first embodiment will be described with reference to Fig. 1 to Fig. 3. Fig. 1 is a plan view (xy plan view) of the reserve tank according to the first embodiment. Fig. 2 is a cross-sectional view (xz cross-sectional view) of the reserve tank according to the first embodiment. Fig. 3 is a cross-sectional view (yz cross-sectional view) of the reserve tank according to the first embodiment.

[0017] An overview of the reserve tank 10 shown in Figs. 1 to 3 will be described. The reserve tank 10 is used in a cooling system mounted on a vehicle. The cooling system cools various parts of the vehicle that are to be cooled, such as the internal combustion engine and auxiliary machinery, by circulating coolant. In the cooling system, coolant pumped by a water pump is supplied to the object to be cooled and cools the object. The coolant, which has become hot after passing through the object to be cooled, is cooled in a radiator and returns to the water pump, and is pumped out again by the water pump.

[0018] The reserve tank 10 is provided in such a cooling system at a position in the path through which the coolant circulates, for example, at a position upstream of a water pump. The reserve tank 10 stores the coolant for cooling objects of the vehicle. In the example shown in Figs. 1 to 3, the hatching indicates the coolant.

[0019] Next, each component of the reserve tank 10 will be described. As shown in Fig. 1, the reserve tank 10 includes a gas-liquid separator 11, an inlet 12, an outlet 13, and a partition 14. A hose (not shown), a radiator (not shown), a water pump (not shown), and an object to be cooled (not shown) are connected between the inlet 12 and the outlet 13 to form a flow path through which the coolant circulates. Hereinafter, the flow path (not shown) through which the coolant circulates is referred to as a circulation flow path.

[0020] The gas-liquid separation section 11 will now be described. As shown in Fig. 1 to Fig. 3, the gas-liquid separation section 11 has a substantially cylindrical shape. The gas-liquid separation section 11 is a container for temporarily storing the cooling water to be supplied and for separating air bubbles contained in the cooling water.

[0021] In the example shown in Fig. 1, the gas-liquid separation section 11 has an elliptical shape in the xy plane view. However, the gas-liquid separation section 11 is not limited to this shape, and may have any closed shape such as a circle. In other words, the substantially circular column refers to a columnar body consisting of two parallel planes that are roughly circular, including not only a perfect circle but also an ellipse or an oval, and a side surface connecting the two planes. A method for separating bubbles in the gas-liquid separation section 11 will be described later.

[0022] The inlet 12 will now be described. As shown in Figs. 1 and 3, the inlet 12 is provided on the side of the gas-liquid separation section, and allows the cooling water to flow into the gas-liquid separation section 11. As shown in Figs. 1 and 3, the inlet 12 indicates an opening provided on the side of the gas-liquid separation section. The reserve tank 10 is provided with an inlet connection port C12, and a hose is connected to the inlet connection port C12. A portion of the cooling water that does not pass through a radiator (not shown) flows into the gas-liquid separation section 11 through the inlet 12.

[0023] The outlet 13 will now be described. As shown in Figs. 1 to 3, the outlet 13 is provided on the bottom surface of the gas-liquid separation section, and allows the cooling water to flow out from inside the gas-liquid separation section. As shown in Figs. 2 and 3, the outlet 13 indicates an opening provided on the bottom surface of the gas-liquid separation section. The reserve tank 10 is provided with an outlet connection port C13, and a hose is connected to the outlet connection port C13. When a water pump (not shown) is operated, the cooling water stored in the gas-liquid separation section 11 is supplied to the object to be cooled through the outlet 13.

[0024] The partition unit 14 will now be described. As shown in Fig. 1 and Fig. 2, the partition unit 14 is provided inside the gas-liquid separation unit 11 so as to divide the cooling water flowing in from the inlet 12. As shown in Fig. 1, the partition unit 14 has a surface parallel to the y-axis, and is provided inside the gas-liquid separation unit 11 from the side of the gas-liquid separation unit 11 having the inlet 12 to the other side of the gas-liquid separation unit 11.

[0025] 1 and 2, the partition 14 is provided so as to equally divide the cooling water flowing in from the inlet 12. In the example shown in Fig. 1 and 2, two internal spaces S1 and S2 are formed in the gas-liquid separation section 11 by the partition 14. The volumes of the cooling water flowing in to the internal space S1 and the internal space S2 are equal.

[0026] 1 to 3, the partition 14 is provided so as to equally divide the cooling water flowing out from the outlet 13. More specifically, the partition 14 is provided directly above the outlet 13, and the center position of the outlet 13 is the same as the center of the gas-liquid separation section.

[0027] <Swirling flow> Next, the swirling flows generated in the gas-liquid separation section 11 will be described with reference to Figs. 1 to 3. In Figs. 1 to 3, the swirling flows V1 and V2 generated in the gas-liquid separation section 11 are shown by arrows. The swirling flows V1 and V2 are generated when the flow rate of the cooling water is increased to improve the cooling performance. As shown in Figs. 1 to 3, the flow speed of the swirling flows V1 and V2 increases from the inside to the outside of the swirling flows, so that the liquid level increases from the inside to the outside of the swirling flows. In other words, the swirling flows V1 and V2 have a shape with a concave center. In the example shown in Figs. 1 to 3, the centers of the swirling flows V1 and V2 change linearly, but they may have a mortar shape with a gentle slope.

[0028] In the swirling flows V1 and V2, air bubbles contained in the cooling water are centrifuged. The air bubbles contained in the cooling water are, for example, air bubbles contained in the cooling water that cannot be centrifuged in the gas-liquid separation section 11, are supplied from the outlet 13, and return directly to the inlet 12. As another example, the air bubbles contained in the cooling water are air bubbles generated in the circulation path.

[0029] 1 to 3, the centrifugal separation of the bubbles A in the swirling flows V1 and V2 will be described in more detail. Even if the flow rate of the cooling water is increased to improve the cooling performance, as shown in FIG. 1, the gas-liquid separation section 11 is provided with the partition section 14, so that the cooling water from the inlet 12 is equally divided. As a result, the cooling water flows equally into the internal spaces S1 and S2. As a result, the cooling water flows into the internal spaces S1 and S2 along the wall surface of the partition section 14, so that the swirling flows V1 and V2 are generated while maintaining an appropriate flow velocity.

[0030] 2 and 3, swirling flows V1 and V2 are formed in the internal spaces S1 and S2, and the cooling water in the internal spaces S1 and S2 flows toward the outside of the swirling flows V1 and V2, i.e., toward the side of the gas-liquid separation section 11, due to centrifugal force. On the other hand, air bubbles A contained in the cooling water are lighter than the cooling water and are therefore collected near the center of the swirling flows V1 and V2 of the cooling water. Air bubbles A reach the liquid levels WS1 and WS2 of the cooling water and are collected in the space above the gas-liquid separation section 11. Through this process, the air bubbles contained in the cooling water can be separated.

[0031] In other words, although the flow rate of the cooling water flowing into the reserve tank is increased, the cooling water is divided into each internal space by the partition 14, so that an appropriate flow rate can be ensured and air bubbles can be separated without changing the capacity of the reserve tank. In other words, in the reserve tank 10, the flow rate to each internal space can be reduced compared to a case where the partition 14 is not provided, so that air bubbles can be separated.

[0032] If the reserve tank is not provided with the partition section 14, it is necessary to increase the tank capacity and slow down the flow rate in order to separate the cooling water bubbles. On the other hand, in the reserve tank 10 according to the first embodiment, by providing the partition section 14, it is possible to reduce the capacity of the reserve tank compared to a case in which the partition section 14 is not provided. Therefore, it is possible to provide a reserve tank that is low cost, lightweight, and has excellent installation space efficiency.

[0033] Here, attention is paid to the center position of the outlet 13 and the center positions of the swirling flows V1, V2. As shown in Figs. 1 and 2, the partition 14 is provided directly above the outlet 13 so as to equally divide the cooling water flowing out from the outlet 13. Therefore, the center position of the outlet 13 is a position that is offset from the center positions of the swirling flows V1, V2 of the cooling water generated in each of the internal spaces S1, S2. That is, the size of the outlet 13 for each of the internal spaces S1, S2 of the gas-liquid separation section becomes equal, and the separated bubbles can be evenly suppressed from flowing out of the outlet 13 without being biased in each of the internal spaces S1, S2. Therefore, the cooling performance can be improved.

[0034] Moreover, when the flow rate of the cooling water is increased to further improve the cooling performance, the difference in flow velocity between the outer side and the inner side of the swirling flows V1, V2 becomes larger. In such a case, the height of the liquid levels WS1, WS2 of the cooling water becomes lower and the liquid level has a steeper gradient from the inner side of the swirling flow to the outer side of the swirling flow compared to Fig. 2 and Fig. 3. Even if the height of the liquid levels WS1, WS2 becomes lower, the center position of the outlet 13 is off the center position of the swirling flows V1, V2 of the cooling water generated in each internal space S1, S2, so that the separated bubbles can be prevented from flowing out of the outlet 13.

[0035] In other words, by providing a partition section 14 inside the gas-liquid separation section 11 and positioning the center position of the outlet 13 away from the center positions of the swirling flows V1, V2 of cooling water generated in each internal space S1, S2, the cooling performance can be further improved.

[0036] Here, the partition 14 may be provided with a communication port (not shown). The communication port (not shown) is a hole for adjusting the amount or liquid level of the cooling water in each of the internal spaces S1, S2 and the proportion of the space above the gas-liquid separation unit 11. As a result, the fluctuation of the liquid level in each of the internal spaces S1, S2 of the reserve tank becomes the same as that of a reserve tank without the partition 14. When the vehicle starts and stops, the flow rate is low, but the liquid level of the cooling water stored in the reserve tank 10 is likely to fluctuate due to forward / backward / left / right movements. In such a case, if the outlet 13 is provided near the side of the gas-liquid separation unit 11, there is a risk that air bubbles contained in the cooling water will flow out from the outlet 13 due to the influence of the liquid level fluctuation.

[0037] 1 to 3, providing outlet 13 at the center of gas-liquid separation unit 11 makes it less susceptible to the effects of liquid level fluctuations, and therefore can prevent air bubbles contained in the cooling water from flowing out from outlet 13. In other words, in reserve tank 10, separated air bubbles can be prevented from flowing out from outlet 13 not only when the flow rate of cooling water is increased, but also when the flow rate of cooling water is low.

[0038] <Modification> So far, an example of a reserve tank has been described in which the partition 14 is provided so as to equally divide the cooling water flowing out from the inlet 12, and further the partition 14 is provided so as to equally divide the cooling water flowing out from the outlet. However, the present invention is not limited to this, and the reserve tank may be one according to the following modified example. The reserve tank according to the modified example will be described with reference to FIG. 4. FIG. 4 is a plan view (xy plan view) of the reserve tank according to the modified example. In the reserve tanks 20, 30, and 40 according to the modified example shown in FIG. 4, the partition 14 is provided inside the gas-liquid separation section 11 so as to divide the cooling water flowing in from the inlet 12.

[0039] A reserve tank 20 according to a modified example shown in Fig. 4 will be described. In the reserve tank 20 shown in Fig. 4, the position of the outlet 13 and the position of the partition part 14 are different from those of the reserve tank 10 shown in Fig. 1. In addition, in the reserve tank 20, the size of the internal space S3 and the internal space S4 is different from those of the reserve tank 10 due to the different position of the partition part 14. Other configurations are the same as those of the reserve tank 10 shown in Fig. 1, so description thereof will be omitted.

[0040] 4, in the reserve tank 20, the partition 14 is provided inside the gas-liquid separation section 11 so as to divide the cooling water flowing in from the inlet 12. As shown in FIG. 4, in the gas-liquid separation section 11 of the reserve tank 20, internal spaces S3 and S4 are formed by the partition 14. The ratio of the internal space S3 to the interior of the gas-liquid separation section 11 and the ratio of the internal space S4 to the interior of the gas-liquid separation section 11 may be any ratio, as long as the partition 14 is provided so as to divide the cooling water flowing in from the inlet 12.

[0041] In the reserve tank 20 shown in Fig. 4, even if the flow rate of the cooling water is increased to improve the cooling performance, the cooling water from the inlet 12 is divided and flows into each of the internal spaces S3, S4. Therefore, in each of the internal spaces S3, S4, swirling flows V3, V4 are generated while ensuring an appropriate flow rate. In this way, even if the cooling water is not divided and flows into each internal space equally, an appropriate flow rate can be ensured, and air bubbles can be separated without changing the capacity of the reserve tank.

[0042] 1, in the reserve tank 20 shown in Fig. 4, the partition 14 is not provided directly above the outlet 13, but the center position of the outlet 13 is offset from the center positions of the swirling flows V3, V4 of the cooling water generated in each of the internal spaces S3, S4. In this way, even if the partition 14 is not provided so as to divide the cooling water flowing out from the outlet 13, as long as the center position of the outlet 13 is offset from the center positions of the swirling flows V3, V4, it is possible to suppress separated air bubbles from flowing out from the outlet 13, thereby improving the cooling performance.

[0043] Here, as in the reserve tank 30 shown in Fig. 4, the partition 14 may be provided inside the gas-liquid separation section 11 so as to separate the cooling water flowing in from the inlet 12, and the partition 14 may be provided so as to separate the cooling water flowing out from the outlet 13. As shown in Fig. 4, in the gas-liquid separation section 11 of the reserve tank 30, the partition 14 forms internal spaces S5 and S6. The partition 14 may be provided so that the ratio of the internal space S5 to the interior of the gas-liquid separation section 11 and the ratio of the internal space S6 to the interior of the gas-liquid separation section 11 are not limited, and the partition 14 may be provided so as to separate the cooling water flowing in from the inlet 12 and the cooling water flowing out from the outlet 13.

[0044] 4, when the flow rate of the cooling water is increased to improve the cooling performance, swirling flows V5, V6 are generated in the internal spaces S5, S6. The center position of the outlet 13 is a position that is offset from the center position of the swirling flows V5, V6 of the cooling water generated in the internal spaces S5, S6.

[0045] Even with such a configuration of the reserve tank 30, an appropriate flow rate can be ensured for each of the internal spaces S5, S6, and the air bubbles can be separated without changing the capacity of the reserve tank. Furthermore, since the center position of the outlet 13 is a position that is offset from the center positions of the swirling flows V5, V6 of the cooling water generated in each of the internal spaces S5, S6, the separated air bubbles can be prevented from flowing out of the outlet 13, and the cooling performance can be improved.

[0046] Of course, as in the reserve tank 40 shown in Figure 4, the partition section 14 may be provided inside the gas-liquid separation section 11 so as to divide the cooling water flowing in from the inlet 12, and the partition section 14 may be provided so as to equally divide the cooling water flowing out from the outlet 13.

[0047] In the reserve tank 40, the partition 14 forms internal spaces S7 and S8 in the gas-liquid separation section 11. In the reserve tank 40, swirling flows V7 and V8 are generated in the internal spaces S7 and S8, respectively. In the reserve tank 40, the configuration for separating air bubbles and the configuration for preventing the separated air bubbles from flowing out of the outlet 13 are similar to those of the reserve tanks 20 and 30, and therefore a description thereof will be omitted. Also, although the reserve tanks 20, 30 and 40 shown in FIG. 4 have one partition 14, a plurality of partitions may be provided.

[0048] In this way, in the reserve tank according to the modified example, the cooling water from the inlet is divided, so that a swirling flow is generated while maintaining an appropriate flow rate, and the air bubbles can be separated in the gas-liquid separator. Also, in the reserve tank according to the modified example, the center position of the outlet is shifted from the center position of the swirling flow, so that the separated air bubbles can be prevented from flowing out of the outlet, thereby improving the cooling performance.

[0049] (Embodiment 2) <Shielding plate> The reserve tank according to the second embodiment will be described with reference to Fig. 5. Fig. 5 is a cross-sectional view (yz cross-sectional view) of the reserve tank according to the second embodiment. In the reserve tank 50 according to the second embodiment, the gas-liquid separation section 11, the inlet 12, the outlet 13, and the partition section 14 are similar in configuration to the reserve tank 10 according to the first embodiment, and therefore description thereof will be omitted. Here, the shielding plate 51 will be described.

[0050] The shielding plate 51 is provided between the inlet 12 and the outlet 13 so as to protrude upward from the bottom surface of the gas-liquid separation section 11. The shielding plate 51 will be described in more detail with reference to FIG.

[0051] The shielding plate 51 is provided on the bottom surface of the gas-liquid separation unit 11 so as to block a straight line connecting a predetermined position of the inlet 12 and a predetermined position of the outlet 13. The predetermined position of the inlet 12 is any position of the inlet 12, and corresponds to position P1 in the example shown in FIG. 5. The predetermined position of the outlet 13 is any position of the outlet 13, and corresponds to position P2 in the example shown in FIG. 5. As shown in FIG. 5, the straight line connecting position P1 and position P2 is line L1, and the shielding plate 51 is provided on the bottom surface of the gas-liquid separation unit 11 so as to block line L1.

[0052] In this manner, by providing the shielding plate 51, it is possible to prevent the cooling water that has flowed into the gas-liquid separation section from the inlet 12 from flowing out directly from the outlet 13. In other words, even if the cooling water from the inlet 12 contains air bubbles, the shielding plate 51 causes the cooling water from the inlet 12 to flow into the gas-liquid separation section 11 so as to stagnate, and the air bubbles can be separated by the swirling flows V1 and V2. Then, the cooling water from which the air bubbles have been separated flows out from the outlet 13.

[0053] That is, in the reserve tank 50, the inclusion of air bubbles in the cooling water flowing out from the outlet 13 toward the circulation path and the object to be cooled can be suppressed, thereby improving the cooling performance.

[0054] <Shape of shielding plate> The shape of the shielding plate 51 is not limited to the example shown in Fig. 5, and may be any shape as long as it protrudes upward from the bottom surface of the gas-liquid separation section 11. The angle at which the shielding plate 51 protrudes upward may be any angle. In the example shown in Fig. 5, one shielding plate 51 is provided, but multiple shielding plates may be provided.

[0055] Another example of the shape of the shielding plate will be shown with reference to Fig. 6. Fig. 6 is a cross-sectional view (yz cross-sectional view) of a reserve tank according to embodiment 2. The reserve tank 60 shown in Fig. 6 is different from the reserve tank 50 shown in Fig. 5 in the shape of the shielding plate 51, but other configurations are similar, so description thereof will be omitted.

[0056] As shown in Fig. 6, the shielding plate 52 is provided between the inlet 12 and the outlet 13 and protrudes upward from the bottom surface of the gas-liquid separation unit 11. More specifically, as shown in Fig. 6, the shielding plate 52 has a shielding plate portion 52a and a shielding plate portion 52b. The shielding plate portion 52a is parallel to the z-axis, and the shielding plate portion 52b is parallel to the y-axis. In other words, the shielding plate 52 is provided on the bottom surface of the gas-liquid separation unit 11 between the inlet 12 and the outlet 13 so as to cover a part of the edge of the outlet 13.

[0057] Even if the shielding plate 52 has such a shape, the reserve tank 60 can prevent air bubbles from being contained in the cooling water flowing out from the outlet 13 toward the circulation path and the object to be cooled, thereby improving the cooling performance.

[0058] The present disclosure is not limited to the above-described embodiment, and may be modified as appropriate without departing from the spirit and scope of the present disclosure. [Explanation of symbols]

[0059] 10, 20, 30, 40, 50, 60 Reserve Tank 11 Gas-liquid separation section 12 Inlet 13 Outlet 14 Partition 51, 52 Shielding plate 52a, 52b shielding plate portion A bubble C12 inflow port C13 outflow port S1, S2, S3, S4, S5, S6, S7, S8 Internal Space V1, V2, V3, V4, V5, V6, V7, V8 swirl flow WS1, WS2 liquid level

Claims

1. A reserve tank for storing cooling water for a vehicle, A gas-liquid separation section having a substantially cylindrical shape; an inlet provided on a side surface of the gas-liquid separation unit for allowing cooling water to flow into the gas-liquid separation unit; an outlet provided on a bottom surface of the gas-liquid separation unit and through which cooling water flows out from inside the gas-liquid separation unit; a partition portion is provided inside the gas-liquid separation portion so as to divide the cooling water flowing in from the inlet, thereby forming a plurality of internal spaces in the gas-liquid separation portion; The center position of the outlet is a position offset from the center position of the swirling flow of cooling water generated in each internal space. Reserve tank.

2. The partition portion is provided so as to divide the cooling water flowing out from the outlet. The reserve tank according to claim 1.

3. The partition portion is provided so as to equally divide the cooling water flowing out from the outlet.

3. The reserve tank according to claim 1 or 2.

4. The partition portion is provided so as to equally divide the cooling water flowing out from the inlet, The center position of the outlet is the same as the center of the gas-liquid separation unit. The reserve tank according to claim 3.

5. A shielding plate protruding upward from a bottom surface of the gas-liquid separation unit is provided between the inlet and the outlet.

3. The reserve tank according to claim 1 or 2.

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