Reservoir tank comprising bypass partition, and integrated thermal management system comprising same

Abstract

Disclosed is a reservoir tank comprising: a reservoir main body including an inner space in which cooling water circulates, an inlet through which the cooling water flows in, and an outlet through which the cooling water flows out; and a bypass partition which is disposed in the reservoir main body so as to divide the inlet from the outlet, and which allows a part of the cooling water flowing in through the inlet to make a detour to a valve device connected to the outlet.

Description

Reservoir tank including bypass bulkhead, and integrated thermal management system including same

[0001] The embodiments relate to a reservoir tank and an integrated thermal management system including the same, and more particularly, to a reservoir tank and an integrated thermal management system capable of improving gas-liquid separation performance for separating air from coolant by stabilizing the flow of coolant by reducing the flow rate of coolant passing through the interior of the reservoir tank.

[0002] Recently, due to environmental concerns surrounding internal combustion engine vehicles, electric vehicles and other eco-friendly vehicles are expanding in popularity. However, while conventional internal combustion engine vehicles can heat their interiors using waste heat from the engine, eliminating the need for separate heating energy, electric vehicles lack engines and therefore no heat source. Consequently, they must rely on separate energy sources for heating, resulting in lower fuel efficiency. This, in turn, reduces the driving range of electric vehicles, necessitating frequent recharging, and other inconveniences.

[0003] Meanwhile, electrification of vehicles has introduced new thermal management requirements not only for the interior but also for electrical components such as high-voltage batteries and motors. In other words, in electric vehicles, the interior, battery, and electrical components each have distinct climate control needs, necessitating technologies that address these needs independently while simultaneously integrating them to maximize energy savings. Accordingly, the concept of integrated vehicle thermal management is being proposed, aiming to independently manage the thermal management of each component while simultaneously integrating the overall vehicle thermal management to enhance thermal efficiency.

[0004] In order to perform integrated thermal management of these vehicles, it is necessary to integrate and modularize complex coolant lines and components. This requires a modularization concept that is simple to manufacture while modularizing multiple components and is also compact in terms of packaging.

[0005] Additionally, for electric vehicles, technology is required to improve driving range and interior heating and cooling performance by utilizing waste heat from components such as electrical components and batteries that generate heat to ensure energy efficiency.

[0006] The matters described as background technology above are only intended to enhance understanding of the background of the present invention, and should not be taken as an admission that they correspond to prior art already known to those skilled in the art.

[0007] The purpose of the embodiments of the present disclosure is to implement a reservoir tank and an integrated thermal management system that can achieve miniaturization by reducing the flow rate of coolant passing through the interior of the reservoir tank.

[0008] Additionally, embodiments of the present disclosure aim to implement a reservoir tank and integrated thermal management system that can improve air extraction performance and reduce noise and the size of the reservoir tank.

[0009] Additionally, embodiments of the present disclosure aim to implement a reservoir tank and integrated thermal management system that can increase the retention time of coolant by stabilizing the flow of coolant and reducing the flow rate of coolant.

[0010] The problems to be solved through the embodiments of the present disclosure are not limited to the problems described above, and problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the embodiments belong from this specification and the attached drawings.

[0011] In order to achieve the above object, the reservoir tank according to the present invention comprises: a reservoir body including an internal space in which coolant circulates, an inlet through which the coolant flows in, and an outlet through which the coolant flows out; and a bypass bulkhead arranged in the reservoir body to divide the inlet and the outlet, and bypassing a portion of the coolant flowing in through the inlet to a valve device connected to the outlet.

[0012] A cooling water line through which the cooling water flows is connected to the reservoir body, and a portion of the cooling water passing through the cooling water line can be introduced into the inlet by the bypass bulkhead, and the remaining portion can be bypassed by the valve device.

[0013] The bypass bulkhead may be arranged to extend from the inner space so as to protrude outwardly of the reservoir body and to cover at least a portion of the bypass flow path of the valve device connected to the inlet and the outlet.

[0014] The above bypass bulkhead may include a spiral shape formed along the circumferential direction of the inlet and the outlet, extending along the direction in which the inlet and the outlet extend.

[0015] The bypass bulkhead includes a first portion facing the valve device and a second portion facing the reservoir tank, and the first portion and the second portion may be arranged to be offset from each other.

[0016] The reservoir tank may further include a cap that seals the interior of the reservoir body and is separated from the reservoir body when the internal pressure of the reservoir body exceeds a preset pressure.

[0017] The above bypass baffle can be movably arranged to adjust the area covering the bypass path of the valve device connected to the inlet and outlet.

[0018] The above bypass bulkhead can be movably arranged to adjust the size of the inlet.

[0019] The above bypass bulkhead may include a guide surface having a curved surface to guide the flow of the coolant along the inlet.

[0020] The above bypass bulkhead may include a guide surface having a curved surface to guide the flow of the coolant along the outlet.

[0021] In order to achieve the above object, the reservoir tank according to the present invention comprises: a reservoir body including an internal space in which coolant circulates, an inlet for introducing the coolant, and an outlet for introducing the coolant, the inlet being located at a position spaced apart from the inlet; and a branch passage connected to the inlet of the reservoir body and the coolant line through which the coolant flows, respectively; A portion of the coolant passing through the coolant line flows into the inlet through the branch passage, and the remaining portion is bypassed by a valve device connected to the outlet.

[0022] An integrated thermal management system according to the present invention for achieving the above purpose includes: a reservoir tank; and a valve device connected to the reservoir tank and including a bypass path through which a portion of the cooling water is bypassed.

[0023] The bypass flow path may include a first portion connected to the inlet and blocked by the bypass bulkhead, a second portion connected to the outlet and partitioned from the first portion with the bypass bulkhead interposed therebetween, and a third portion connected to the first portion and the second portion so that the cooling water is bypassed to the valve device.

[0024] An integrated thermal management system according to the present invention for achieving the above object includes: a reservoir tank including an internal space through which cooling water circulates, an inlet for introducing the cooling water, and an outlet for introducing the cooling water; a valve device connected to the outlet of the reservoir tank; and a bypass valve for controlling the flow rate of the cooling water bypassed to the valve device.

[0025] The above bypass valve can control the flow rate of the cooling water bypassed to the valve device by controlling the area of ​​the bypass path connected to the outlet, the inlet, and the valve device.

[0026] The above bypass valve is rotatably arranged in one area of ​​the bypass path to adjust the area of ​​the bypass path.

[0027] The above bypass valve can be operated in a first mode to block the inlet of the reservoir tank.

[0028] The above bypass valve can operate in a second mode to block the flow of the cooling water flowing into the valve device.

[0029] The bypass valve may be operated in a third mode to allow a portion of the coolant to flow into the inlet while allowing the remainder of the coolant to bypass the valve device.

[0030] The reservoir tank and integrated thermal management system according to various embodiments of the present disclosure can achieve miniaturization, thereby reducing weight and reducing manufacturing costs.

[0031] Additionally, the reservoir tank and integrated thermal management system according to various embodiments of the present disclosure can improve usability by reducing the amount of noise generated and reducing the amount of air generated.

[0032] Additionally, the reservoir tank and integrated thermal management system according to various embodiments of the present disclosure can improve the gas-liquid separation performance for separating air from the coolant by increasing the time the coolant remains therein.

[0033] Additionally, the reservoir tank and integrated thermal management system according to various embodiments of the present disclosure can improve overall usability by reducing the possibility of component failure.

[0034] The effects of the embodiments are not limited to the effects described above, and effects not mentioned can be clearly understood by a person having ordinary skill in the art to which the embodiments belong from this specification and the attached drawings.

[0035] Figure 1 is a conceptual diagram of an integrated thermal management system according to one embodiment of the present invention.

[0036] FIG. 2 is a conceptual diagram illustrating the flow direction of coolant flowing between a reservoir tank and a valve device in the integrated thermal management system of FIG. 1.

[0037] FIG. 3 is a perspective view of an integrated thermal management system according to one embodiment of the present invention.

[0038] FIG. 4 is a side view of an integrated thermal management system according to one embodiment of the present invention.

[0039] FIG. 5 is a side cross-sectional view of an integrated thermal management system according to one embodiment of the present invention based on the VV cross-sectional line of FIG. 3.

[0040] FIG. 6 is a cross-sectional view of an integrated thermal management system according to one embodiment of the present invention taken along the VI-VI cross-sectional line of FIG. 3.

[0041] FIG. 7 is a cross-sectional view of an integrated thermal management system according to one embodiment of the present invention taken along the VII-VII cross-sectional line of FIG. 3.

[0042] FIG. 8 is an enlarged view of part A of FIG. 5 to explain a bypass bulkhead according to one embodiment of the present invention.

[0043] FIG. 9 is an enlarged view of part A of FIG. 5 to explain an example of a bypass bulkhead that controls the area of ​​the bypass euro.

[0044] FIG. 10 is an enlarged view of part B of FIG. 7 to illustrate another example of a bypass bulkhead that controls the area of ​​the inlet.

[0045] FIG. 11 is an enlarged view of part A of FIG. 5 to explain an example of a bypass bulkhead according to one embodiment of the present invention.

[0046] Fig. 12(a) is a drawing of the reservoir tank of Fig. 11 viewed from below, and Fig. 12(b) is a drawing of the reservoir tank of Fig. 11 viewed from above.

[0047] FIG. 13 is an enlarged view of part A of FIG. 5 to explain another example of a bypass bulkhead according to one embodiment of the present invention.

[0048] Figure 14 is a schematic cross-sectional view of an integrated thermal management module including a branch euro.

[0049] Figure 15 is a conceptual diagram of an integrated thermal management module including a bypass valve.

[0050] Figure 16 is a schematic diagram of an integrated thermal management module including a bypass valve operating in mode 1.

[0051] Figure 17 is a schematic diagram of an integrated thermal management module including a bypass valve operating in a second mode.

[0052] Figure 18 is a schematic diagram of an integrated thermal management module including a bypass valve operating in a third mode.

[0053] The terms used in the examples have been selected from widely used, current terms, taking into account the functions of the present invention. However, these terms may vary depending on the intentions of those skilled in the art, precedents, the emergence of new technologies, etc. Furthermore, in certain cases, terms may be arbitrarily selected by the applicant, in which case their meanings will be described in detail in the relevant description of the invention. Therefore, the terms used in the present invention should be defined based on their meaning and the overall content of the present invention, rather than simply their names.

[0054] Additionally, terms such as “-unit”, “-module”, etc. described in the specification mean a unit that processes at least one function or operation, which may be implemented as hardware or software, or a combination of hardware and software.

[0055] As used herein, when an expression such as "at least one" precedes an array of elements, it modifies the entire array of elements, not just each individual element. For example, the expression "at least one of a, b, and c" should be interpreted to include a, b, c, or a and b, a and c, b and c, or a and b and c.

[0056] In addition, in the drawings below, the thickness and size of each layer are exaggerated for convenience and clarity of explanation, and the same reference numerals in the drawings indicate the same elements. As used herein, the term "and / or" includes any one and all combinations of one or more of the listed items. In addition, the meaning of "connected" in this specification means not only when member A and member B are directly connected, but also when member C is interposed between member A and member B, so that member A and member B are indirectly connected.

[0057] The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting of the present disclosure. As used herein, the singular forms "a," "an," and "the" include plural forms unless the context clearly dictates otherwise. Furthermore, when used herein, the terms "comprises" and / or "comprising" specify the presence of stated features, numbers, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, numbers, operations, elements, components, and / or groups thereof.

[0058] Additionally, terms such as “-unit”, “-module”, etc. described in the specification mean a unit that processes at least one function or operation, which may be implemented as hardware or software, or a combination of hardware and software.

[0059] Although terms such as first, second, etc. are used herein to describe various elements, components, regions, layers, and / or portions, it is to be understood that these elements, components, regions, layers, and / or portions are not limited by these terms. These terms are only used to distinguish one element, component, region, layer, or portion from another. Accordingly, a first element, component, region, layer, or portion described below may also refer to a second element, component, region, layer, or portion without departing from the teachings of the present disclosure.

[0060] Spatial terms such as "lower," "below," "lower," "upper," and "above" may be used to facilitate understanding of one element or feature depicted in the drawings relative to another element or feature. These spatial terms are intended to facilitate understanding of the present disclosure in various process states or usage states and are not intended to limit the present disclosure. For example, if an element or feature in a drawing is flipped, an element or feature described as "lower" or "below" becomes "upper" or "above." Therefore, "below" encompasses "upper" or "below."

[0061] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the attached drawings.

[0062] FIG. 1 is a conceptual diagram of an integrated thermal management system according to one embodiment of the present invention, and FIG. 2 is a conceptual diagram illustrating the flow direction of coolant flowing between a reservoir tank and a valve device in the integrated thermal management system of FIG. 1. FIG. 3 is a perspective view of an integrated thermal management system according to one embodiment of the present invention, and FIG. 4 is a side view of an integrated thermal management system according to one embodiment of the present invention.

[0063] FIG. 5 is a side cross-sectional view of an integrated thermal management system according to an embodiment of the present invention taken along the VV cross-sectional line of FIG. 3, and FIG. 6 is a front cross-sectional view of an integrated thermal management system according to an embodiment of the present invention taken along the VI-VI cross-sectional line of FIG. 3. FIG. 7 is a plan cross-sectional view of an integrated thermal management system according to an embodiment of the present invention taken along the VII-VII cross-sectional line of FIG. 3, and FIG. 8 is an enlarged view of part A of FIG. 5 to explain a bypass bulkhead according to an embodiment of the present invention.

[0064] FIG. 9 is an enlarged view of part A of FIG. 5 to explain an example of a bypass bulkhead that controls the area of ​​a bypass urea, and FIG. 10 is an enlarged view of part B of FIG. 7 to explain another example of a bypass bulkhead that controls the area of ​​an inlet.

[0065] FIG. 11 is an enlarged view of part A of FIG. 5 to explain an example of a bypass bulkhead according to one embodiment of the present invention, FIG. 12(a) is a view of the reservoir tank of FIG. 11 as seen from below, FIG. 12(b) is a view of the reservoir tank of FIG. 11 as seen from above, and FIG. 13 is an enlarged view of part A of FIG. 5 to explain another example of a bypass bulkhead according to one embodiment of the present invention.

[0066] Figure 14 is a schematic cross-sectional view of an integrated thermal management module including a branch euro.

[0067] FIG. 15 is a conceptual diagram of an integrated thermal management module including a bypass valve, FIG. 16 is a conceptual diagram of an integrated thermal management module including a bypass valve operating in a first mode, FIG. 17 is a conceptual diagram of an integrated thermal management module including a bypass valve operating in a second mode, and FIG. 18 is a conceptual diagram of an integrated thermal management module including a bypass valve operating in a third mode.

[0068] Referring to FIG. 1, the integrated thermal management system (1) according to the present invention may include a valve device (100), a reservoir tank (200), a pump (300), and a chiller (400).

[0069] The valve device (100) can control the direction / flow / volume of the cooling water circulating through the integrated thermal management system (1) through the cooling water line (10). The cooling water circulating through the integrated thermal management system (1) through the cooling water line (10) can pass through the valve device (100). For example, the valve device (100) can be implemented as a 6-way valve or an 8-way valve, but the present embodiment is not limited thereto.

[0070] The valve device (100) is connected to the reservoir tank (200). In addition, the valve device (100) may be connected to a chiller (400), an automobile component (20), a heat exchanger (30), a battery (40), and a heater (50). For example, the coolant may cool the automobile component (20) by dissipating heat generated from the automobile component (20) (PE (Power Electric), motor, inverter, converter, etc.) through a radiator or by transferring the heat of the automobile component (20) to a coolant through the chiller (400). In addition, the coolant may indirectly cool the battery (40) by dissipating heat generated from the battery (40) through a battery radiator or by transferring the heat to a coolant through the chiller (400). The battery (40) may be connected to a heater (50). For example, the heater (50) is a water-heating heater for preheating the battery of an electric vehicle, and can be used for shortening the rapid charging time and for low-temperature battery output.

[0071] The reservoir tank (200) provides a space through which coolant can circulate. The interior of the reservoir tank (200) can be partitioned by at least one partition wall. Coolant introduced into the reservoir tank (200) can sequentially flow through the interior space of the reservoir tank (200) partitioned by at least one partition wall, and air contained in the coolant can be separated and move upward. That is, the coolant can be separated from the air as it flows through the interior of the reservoir tank (200). The coolant from which the air has been separated can flow to the valve device (100).

[0072] The reservoir tank (200) may be connected to a heat exchanger (30). As the cooling water passes through the heat exchanger (30), heat may be exchanged with the refrigerant of the heat exchanger (30), and as a result, the temperature of the cooling water may be lowered. The cooling water with the lowered temperature may be introduced into the reservoir tank (200) through the cooling water line (10). The cooling water introduced into the reservoir tank (200) may be introduced back into the valve device (100).

[0073] The pump (300) can generate driving force to allow coolant to flow within the integrated thermal management system (1) according to the present invention. The pump (300) can be connected to a valve device (100). Coolant introduced into the valve device (100) can flow to the battery (40) and / or automobile parts (20) through the coolant line (10) by the pump (300). In one embodiment, the integrated thermal management system (1) according to the present invention may include a plurality of pumps (300).

[0074] A chiller (400) may be connected to a valve device (100). The chiller (400) may be used to remove heat from cooling water circulating in a cooling water line (10). For example, the chiller (400) may be implemented with a vapor-compression or absorption refrigeration cycle. The cooling water cooled through the chiller (400) may be introduced into the valve device (100) and circulated in the cooling water line (10) of the integrated thermal management system (1).

[0075] In the past, there was a problem that the size of the entire thermal management system increased as multiple valve devices were configured inside the thermal management system for the circulation of coolant through the coolant line (10). However, according to the integrated thermal management system (1) according to the embodiment of the present invention, the structure of the integrated thermal management system (1) can be compact as the flow direction of coolant circulating through the components of the integrated thermal management system (1) is switched by one valve device (100). That is, the integrated thermal management system (1) according to the embodiment of the present invention can implement a compact structure and secure design freedom by configuring an integrated module with one valve device (100).

[0076] FIG. 2 is a conceptual diagram illustrating the flow direction of coolant flowing between a reservoir tank and a valve device in the integrated thermal management system of FIG. 1.

[0077] Referring to FIG. 2, an integrated thermal management system (1) according to one embodiment of the present invention may include a heat exchanger (30), a valve device (100), and a reservoir tank (200). At least one of the components of the integrated thermal management system (1) illustrated in FIG. 2 has been described in FIG. 1, and therefore, any redundant description thereof will be omitted below.

[0078] According to one embodiment of the present invention, a portion of the cooling water that has passed through the heat exchanger (30) may be bypassed directly to the valve device (100) without flowing into the reservoir tank (200). That is, a portion of the cooling water flowing into the reservoir tank (200) may flow directly to the valve device (100).

[0079] Conventionally, all of the cooling water that passed through the heat exchanger (30) flowed into the reservoir tank (200), and the cooling water that flowed into the reservoir tank (200) flowed back into the valve device (100). That is, conventionally, the structure was implemented such that all of the cooling water circulating through the integrated thermal management system (1) passed through the reservoir tank (200).

[0080] Accordingly, the amount of coolant flowing through the interior of the reservoir tank (200) has increased in the past, which has increased the amount of noise generated in the reservoir tank (200), and the amount of air generated inside the reservoir tank (200) due to the excessive amount of coolant has increased.

[0081] In addition, as the flow rate of the coolant passing through the interior of the reservoir tank (200) increases, the flow of the coolant flowing through the interior of the reservoir tank (200) becomes unstable. Due to the unstable flow rate of the coolant, the gas-liquid separation performance for separating air from the coolant inside the reservoir tank (200) may deteriorate. Accordingly, in the past, there was a problem in that the coolant without air separation circulated inside the thermal management system, causing noise in one component (e.g., a pump) and causing a failure of one component, thereby lowering the overall efficiency of the thermal management system.

[0082] According to one embodiment of the present invention, some of the coolant flowing into the reservoir tank (200) is bypassed to the valve device (100), so that the flow rate of the coolant passing through the interior of the reservoir tank (200) can be reduced compared to the prior art. Accordingly, the miniaturization of the reservoir tank (200) can be realized, thereby promoting weight reduction of the integrated thermal management system (1) and reducing manufacturing costs. In addition, the noise generated from the reservoir tank (200) can be reduced, and the amount of air generated inside the reservoir tank (200) can be reduced due to the reduced flow rate of the coolant.

[0083] Meanwhile, as the flow rate of the coolant passing through the interior of the reservoir tank (200) decreases, the possibility of the coolant flowing through the interior of the reservoir tank (200) becoming unstable can be reduced. Accordingly, the flow of the coolant flowing through the interior of the reservoir tank (200) is stabilized, and the flow rate of the coolant is reduced, so that the time that the coolant remains in the interior of the reservoir tank (200) can be increased. Accordingly, the gas-liquid separation performance for separating air from the coolant within the reservoir tank (200) can be improved. Accordingly, the possibility of noise generation in one component due to coolant from which air has not been separated circulating through the interior of the thermal management system can be reduced, and the possibility of a failure of one component can also be reduced. As a result, the overall efficiency of the integrated thermal management system (1) can be improved.

[0084] Hereinafter, the specific structure of an integrated thermal management system (1) according to one embodiment of the present invention will be described with reference to the attached drawings.

[0085] FIG. 3 is a perspective view of an integrated thermal management system according to one embodiment of the present invention, and FIG. 4 is a side view of an integrated thermal management system according to one embodiment of the present invention.

[0086] Referring to FIGS. 3 and 4, the integrated thermal management system (1) may include a valve device (100) and a reservoir tank (200). At least one of the components of the integrated thermal management system (1) illustrated in FIGS. 3 and 4 has been described above, and therefore, a redundant description thereof will be omitted below.

[0087] The valve device (100) may be connected to a reservoir tank (200). For example, the valve device (100) may be connected to the lower portion of the reservoir tank (200).

[0088] The reservoir tank (200) can be connected to a cooling water line (10). Cooling water introduced into the interior of the reservoir tank (200) through the cooling water line (10) can flow to the valve device (100) and circulate within the integrated thermal management system (1).

[0089] In the present disclosure, the reservoir tank (200) may be connected to the heat exchanger (30) illustrated in FIGS. 1 and 2 via a cooling water line (10), but is not limited thereto. For example, the reservoir tank (200) may be connected to a valve device (100) via a cooling water line (10). That is, cooling water flowing from the valve device (100) into the reservoir tank (200) via the cooling water line (10) may flow back to the valve device (100).

[0090] The reservoir tank (200) may include a cap (201).

[0091] The cap (201) can perform a function of sealing the interior of the reservoir tank (200). The cap (201) can perform a function of preventing the fluid in the interior space of the reservoir tank (200) from escaping to the outside of the reservoir tank (200).

[0092] In one embodiment, the cap (201) can be separated from the reservoir tank (200) when the pressure inside the reservoir tank (200) exceeds a preset pressure. Accordingly, the integrated thermal management system (1) according to one embodiment of the present invention can stabilize the internal pressure of the reservoir tank (200) by opening the cap (201) when the pressure inside the reservoir tank (200) exceeds a preset pressure. Accordingly, the usability stability of the integrated thermal management system (1) can be improved.

[0093] Hereinafter, the internal structure of the valve device (100) and the reservoir tank (200) will be described in detail with reference to the attached drawings.

[0094] FIG. 5 is a side cross-sectional view of an integrated thermal management system according to an embodiment of the present invention taken along the VV cross-sectional line of FIG. 3, FIG. 6 is a front cross-sectional view of an integrated thermal management system according to an embodiment of the present invention taken along the VI-VI cross-sectional line of FIG. 3, and FIG. 7 is a plan cross-sectional view of an integrated thermal management system according to an embodiment of the present invention taken along the VII-VII cross-sectional line of FIG. 3.

[0095] Referring to FIGS. 5 to 7, the integrated thermal management system (1) may include a valve device (100), a bypass path (125), and a reservoir tank (200). At least one of the components of the integrated thermal management system (1) illustrated in FIGS. 5 to 7 has been described above, and therefore, a redundant description thereof will be omitted below.

[0096] The bypass flow path (125) may be a part of a valve device (100) connected to a reservoir tank (200). That is, in the present disclosure, the bypass flow path (125) may be included in the integrated thermal management system (1) as a lower component of the valve device (100). However, the present disclosure is not limited thereto, and the bypass flow path (125) may be included in the integrated thermal management system (1) as a separate component from the valve device (100).

[0097] A portion of the coolant flowing through the bypass path (125) may flow to the reservoir tank (200) by the bypass bulkhead (230), and the remaining portion may be bypassed into the interior of the valve device (100). The bypass path (125) may be connected to each of the coolant line (10) and the reservoir tank (200).

[0098] The reservoir tank (200) may include a reservoir body (210), an internal bulkhead (220), and a bypass bulkhead (230).

[0099] The reservoir body (210) functions as the body of the reservoir tank (200), and an internal space (200c) in which cooling water circulates can be formed in the reservoir body (210). Cooling water introduced into the internal space (200c) can flow along the circumferential direction of the reservoir body (210).

[0100] The reservoir body (210) may be formed with an inlet (200a) and an outlet (200b) that communicate with the internal space (200c).

[0101] The inlet (200a) may be a space or hole through which coolant flows into the internal space (200c). The inlet (200a) may be connected to a bypass path (125) and a coolant line (10). The outlet (200b) may be a space or hole through which coolant flows out from the internal space (200c). The outlet (200b) may be connected to a valve device (100). The coolant flowing into the inlet (200a) may circulate along the circumferential direction of the internal space (200c) as indicated by the arrows in FIG. 7, and may be discharged from the reservoir tank (200) through the outlet (200b).

[0102] The inlet (200a) and outlet (200b) can be formed in one area of ​​the reservoir body (210) and can be spatially separated from each other by a bypass bulkhead (230).

[0103] An internal bulkhead (220) may be arranged in the internal space (200c). The internal space (200c) may be partitioned into multiple spaces by the internal bulkhead (220), and the coolant may flow through the internal space (200c) partitioned into multiple spaces. Air contained in the coolant may be separated from the coolant as it flows through the internal space (200c) partitioned into multiple spaces. A through hole (200d, illustrated in FIG. 5) for the coolant to pass through may be formed in the internal bulkhead (220).

[0104] A bypass bulkhead (230) may be placed in the reservoir body (210). As illustrated by the arrow in FIG. 5, the bypass bulkhead (230) may bypass a portion of the coolant flowing into the inlet (200a) to the valve device (100). That is, a portion of the coolant passing through the coolant line (10) may be introduced into the inlet (200a) by the bypass bulkhead (230), and the remaining portion may be bypassed to the valve device (100).

[0105] Accordingly, the flow rate of the coolant passing through the interior of the reservoir tank (200) can be reduced compared to the past. Therefore, the miniaturization of the reservoir tank (200) can be realized, the noise generated from the reservoir tank (200) can be reduced, and the amount of air generated inside the reservoir tank (200) can be reduced due to the reduced flow rate of the coolant.

[0106] In addition, as the flow rate of the coolant passing through the interior of the reservoir tank (200) decreases, the possibility of turbulence occurring, which causes the flow of the coolant flowing through the interior of the reservoir tank (200) to become unstable, can be reduced. Accordingly, the gas-liquid separation performance for separating air from the coolant within the reservoir tank (200) can be improved. Accordingly, the possibility of noise generation in one component due to the coolant from which air has not been separated circulating within the thermal management system can be reduced, and the possibility of a failure of one component can also be reduced. As a result, the overall efficiency of the integrated thermal management system (1) can be improved.

[0107] The bypass bulkhead (230) may be installed in the internal space (200c) of the reservoir body (210). The bypass bulkhead (230) may be installed in the internal space (200c) so as to extend along the direction in which coolant flows in through the inlet (200a) or the direction in which coolant flows out through the outlet (200b).

[0108] A bypass bulkhead (230) may be installed in the internal space (200c) to partition an inlet (200a) and an outlet (200b). In one embodiment, the inlet (200a) and the outlet (200b) may be formed together in one area of ​​the reservoir body (210), and the bypass bulkhead (230) may spatially partition the inlet (200a) and the outlet (200b) formed together in one area of ​​the reservoir body (210).

[0109] FIG. 8 is an enlarged view of portion A of FIG. 5 to explain a bypass bulkhead according to one embodiment of the present invention. At least one of the components of the integrated thermal management system illustrated in FIG. 8 has been described above, and therefore, a redundant description thereof will be omitted.

[0110] Referring to FIG. 8, the bypass bulkhead (230) may extend from the internal space (200c) so as to protrude outwardly from the reservoir body (210). Accordingly, a portion of the bypass bulkhead (230) (e.g., the lower portion of the bypass bulkhead (230)) may cover at least a portion of the bypass flow path (125). Accordingly, a portion of the cooling water passing through the bypass flow path (125) may flow to the inlet (200a) by being blocked by the bypass bulkhead (230), and the remaining portion may flow to the valve device (100) through an area not blocked by the bypass bulkhead (230).

[0111] The bypass urea (125) can be partitioned into a first portion (1251), a second portion (1252), and a third portion (1253) by a bypass bulkhead (230). The first portion (1251), the second portion (1252), and the third portion (1253) can be connected to each other.

[0112] The first portion (1251) may be a space of a bypass passage (125) blocked by a bypass bulkhead (230). The first portion (1251) may be connected to the inlet (200a) of the reservoir tank (200) and the cooling water line, respectively.

[0113] The second portion (1252) may be a space of the bypass path (125) blocked by the bypass bulkhead (230). The second portion (1252) and the first portion (1251) may be arranged with the bypass bulkhead (230) between them. The second portion (1252) may be connected to the outlet (200b) of the reservoir tank (200) and the inlet port (121) of the valve device (100), respectively.

[0114] The third portion (1253) may be a space of the bypass flow path (125) that is not blocked by the bypass bulkhead (230). The third portion (1253) may be connected to the cooling water line and the inlet port (121) of the valve device (100), respectively.

[0115] According to one embodiment of the present invention, a portion of the cooling water flowing into the bypass passage (125) may be blocked by the bypass bulkhead (230) as shown by the arrow in FIG. 8 and may flow through the first portion (1251) into the inlet (200a) of the reservoir tank (200).

[0116] At this time, the remainder of the cooling water that has flowed into the bypass passage (125) can flow into the inlet port (121) of the valve device (100) through the third portion (1253) that is not blocked by the bypass bulkhead (230), as shown by the arrow in FIG. 8.

[0117] Meanwhile, a portion of the cooling water flowing into the inlet (200a) of the reservoir tank (200) may flow through the internal space (200c) of the reservoir tank (200) to the outlet (200b) and then flow into the inlet port (121) of the valve device (100).

[0118] Below, various embodiments of the structure or shape of the bypass bulkhead (230) will be examined.

[0119] Fig. 9 is an enlarged view of portion A of Fig. 5 to illustrate an example of a bypass bulkhead that controls the area of ​​a bypass path. At least one of the components of the integrated thermal management system illustrated in Fig. 9 has been described above, and therefore, a redundant description thereof will be omitted.

[0120] Referring to FIG. 9, the bypass bulkhead (230) can be movably arranged to adjust the area covering the bypass flow path (125). In the present disclosure, the area covering the bypass flow path (125) is related to the space (S) between the end of the bypass bulkhead (230) and the inner surface of the bypass flow path (125), and as the area covering the bypass flow path (125) increases, the size of the space (S) can decrease. That is, as the area covering the bypass flow path (125) increases, the flow rate of the coolant flowing through the third portion (1253) can decrease.

[0121] For example, when the cooling load required in the integrated thermal management system increases, the bypass bulkhead (230) can reduce the area covering the bypass path (125). In this case, the bypass bulkhead (230) can move toward the reservoir tank (200). Accordingly, the size of the space (S) can increase, and as a result, the flow rate of the cooling water flowing into the inlet port (121) of the valve device (100) through the third portion (1253) can increase, and the flow rate of the cooling water flowing into the inlet (200a) through the first portion (1251) can decrease.

[0122] As another example, when the cooling load required by the integrated thermal management system is reduced or when the amount of air that needs to be separated from the coolant is large due to the coolant containing a large amount of air, the bypass baffle (230) may increase the area covering the bypass flow path (125). In this case, the bypass baffle (230) may move in a direction away from the reservoir tank (200). Accordingly, the size of the space (S) may be reduced, and as a result, the flow rate of the coolant flowing into the inlet (200a) through the first portion (1251) may be increased, and the flow rate of the coolant flowing into the inlet port (121) of the valve device (100) through the third portion (1253) may be reduced.

[0123] In this way, according to an embodiment of the present invention, the flow rate of the bypassed cooling water can be adjusted by moving the bypass bulkhead (230), so that convenience of use can be increased according to various use environments.

[0124] Although not shown, the bypass bulkhead (230) may be operated by a control unit that controls the operation of the integrated thermal management system. The control unit may be implemented as an array of multiple logic gates, or may be implemented as a combination of a general-purpose microprocessor and a memory storing a program executable by the microprocessor, but is not limited thereto.

[0125] Fig. 10 is an enlarged view of portion B of Fig. 7 to illustrate another example of a bypass bulkhead that controls the area of ​​an inlet. At least one of the components of the integrated thermal management system illustrated in Fig. 10 has been described above, and therefore, a redundant description thereof will be omitted.

[0126] Referring to FIG. 10, the bypass bulkhead (230) can be movably arranged to adjust the size of at least one of the inlet (200a) or the outlet (200b). In this case, when the size of the inlet (200a) increases, the flow rate of the coolant flowing into the internal space (200c) of the reservoir body (210) through the inlet (200a) can increase, and the flow rate of the coolant bypassed through the third portion can decrease.

[0127] For example, when the cooling load required by the integrated thermal management system increases, the bypass bulkhead (230) may be moved to reduce the size of the inlet port (200a). In this case, the bypass bulkhead (230) may be moved downward (e.g., toward the cooling water line) in FIG. 10. Accordingly, the flow rate of the cooling water flowing into the internal space (200c) of the reservoir body (210) may be reduced, and the flow rate of the cooling water flowing into the inlet port of the valve device (100) through the third portion may be increased.

[0128] As another example, when the cooling load required by the integrated thermal management system is reduced, or when the amount of air that needs to be separated from the coolant is large due to the coolant containing a large amount of air, the bypass baffle (230) can be moved to increase the size of the inlet port (200a). In this case, the bypass baffle (230) can be moved upward in FIG. 10 (e.g., toward the valve device). Accordingly, the flow rate of the coolant flowing into the internal space (200c) of the reservoir body (210) can be increased, and the flow rate of the coolant flowing into the inlet port of the valve device (100) through the third portion can be reduced.

[0129] In this way, according to an embodiment of the present invention, since the flow rate of the bypassed coolant can be adjusted by the movement of the bypass bulkhead (230), convenience in use according to various use environments can be increased. The direction of movement of the bypass bulkhead (230) illustrated in FIG. 10 may be a direction crossing the direction of movement of the bypass bulkhead (230) illustrated in FIG. 9.

[0130] Although not shown, the bypass bulkhead (230) may be operated by a control unit that controls the operation of the integrated thermal management system.

[0131] FIG. 11 is an enlarged view of part A of FIG. 5 to explain an example of a bypass bulkhead according to one embodiment of the present invention. FIG. 12(a) is a view of the reservoir tank of FIG. 11 as viewed from below, and FIG. 12(b) is a view of the reservoir tank of FIG. 11 as viewed from above.

[0132] At least one of the components of the integrated thermal management system illustrated in FIGS. 11 to 12(b) is identical or similar to at least one of the components of the integrated thermal management system illustrated in FIG. 8, and therefore, any redundant description thereof will be omitted below.

[0133] Referring to FIG. 11, the bypass bulkhead (230) may include a bulkhead body (231).

[0134] The bulkhead body (231) functions as the body of the bypass bulkhead (230) and can extend in a direction from the reservoir tank (200) toward the bypass path (125). At this time, the bulkhead body (231) can include a spiral shape formed along the circumferential direction of the inlet (200a) and the outlet (200b).

[0135] That is, as can be seen with reference to FIGS. 12(a) and 12(b), the first part (231a) of the bulkhead body (231) may not be arranged to overlap with the second part (231b) of the bulkhead body (231), but may be arranged to be misaligned. Accordingly, the fluidity of the cooling water flowing into the internal space (200c) of the reservoir tank (200) along a spiral shape through the inlet (200a) can be improved. In addition, the fluidity of the cooling water flowing out of the reservoir tank (200) along a spiral shape through the outlet (200b) can be improved. The first part (231a) of the bulkhead body (231) may be the lower part of the bypass bulkhead (230) facing the valve device (100), and the second part (231b) of the bulkhead body (231) may be the upper part of the bypass bulkhead (230) facing the reservoir tank (200).

[0136] In one embodiment of the present invention, the angle (a, shown in FIG. 12(b)) between the first part (231a) of the bulkhead body (231) and the second part (231b) of the bulkhead body (231) may be 20 degrees or more and 90 degrees or less.

[0137] FIG. 13 is an enlarged view of part A of FIG. 5 to explain another example of a bypass bulkhead according to one embodiment of the present invention.

[0138] At least one of the components of the integrated thermal management system illustrated in FIG. 13 is identical or similar to at least one of the components of the integrated thermal management system illustrated in FIG. 8, and therefore, any redundant description thereof will be omitted below.

[0139] The bypass bulkhead (230) may include a bulkhead body (231), a first induction member (232), and a second induction member (233).

[0140] The bulkhead body (231) functions as the body of the bypass bulkhead (230), and can extend along the direction in which the inlet (200a) and outlet (200b) extend.

[0141] The first induction member (232) may include a first induction surface (232a) to induce the flow of coolant along the inlet (200a). Accordingly, the coolant can easily flow along the inlet (200a) into the internal space (200c) of the reservoir tank (200) by utilizing the first induction surface (232a) utilizing the so-called Coanda effect. In the present disclosure, the Coanda effect may mean that the fluidity is improved along the curved surface while the fluid remains in close contact with the curved surface.

[0142] The first guide surface (232a) may include a curved surface that is bent toward the bulkhead body (231). The first guide member (232) may be connected to the bulkhead body (231) so as to face the inlet (200a). The first guide member (232) and the bulkhead body (231) may be formed integrally.

[0143] The second induction member (233) may include a second induction surface (233a) to induce the flow of coolant along the outlet (200b). Accordingly, the coolant can easily flow out from the internal space (200c) of the reservoir tank (200) along the outlet (200b) by utilizing the second induction surface (233a) utilizing the so-called Coanda effect.

[0144] The second guide surface (233a) may include a curved surface that is bent toward the bulkhead body (231). The second guide member (233) may be connected to the bulkhead body (231) so as to face the outlet (200b). The second guide member (233) and the bulkhead body (231) may be formed integrally.

[0145] Figure 14 is a schematic cross-sectional view of an integrated thermal management module including a branch euro.

[0146] Referring to FIG. 14, an integrated thermal management system (1) according to one embodiment of the present invention may include a valve device (100), a reservoir tank (200), and a branch flow path (250). At least one of the components of the integrated thermal management system (1) illustrated in FIG. 14 has been described above, and therefore, a redundant description thereof will be omitted below.

[0147] The branch flow path (250) can be connected to the inlet (200a) of the reservoir body (210) and the cooling water line (10), respectively. A portion of the cooling water passing through the cooling water line (10) can be introduced into the inlet (200a) through the branch flow path (250), and the remaining portion can be bypassed to the inlet port (121) of the valve device (100) connected to the outlet (200b).

[0148] Accordingly, even in the embodiment illustrated in FIG. 14, the flow rate of the cooling water passing through the interior of the reservoir tank (200) can be reduced compared to the prior art. Therefore, the miniaturization of the reservoir tank (200) can be realized, the size of the noise generated from the reservoir tank (200) can be reduced, and the amount of air generated inside the reservoir tank (200) can be reduced due to the reduction in the flow rate of the cooling water.

[0149] In addition, as the flow rate of the coolant passing through the interior of the reservoir tank (200) decreases, the possibility of turbulence occurring, which causes the flow of the coolant flowing through the interior of the reservoir tank (200) to become unstable, can be reduced. Accordingly, the gas-liquid separation performance for separating air from the coolant within the reservoir tank (200) can be improved. Accordingly, the possibility of noise generation in one component due to the coolant from which air has not been separated circulating within the thermal management system can be reduced, and the possibility of a failure of one component can also be reduced. As a result, the overall efficiency of the integrated thermal management system (1) can be improved.

[0150] In particular, the branch flow path (250) can also be used in a reservoir tank (200) in which the inlet (200a) and the outlet (200b) are spaced apart from each other. Therefore, in a reservoir tank (200) in which the inlet (200a) and the outlet (200b) are spaced apart from each other, simply installing the branch flow path (250) can achieve the effect of reducing the flow rate of the cooling water passing through the interior of the reservoir tank (200) without a bypass bulkhead (230).

[0151] The branch euro (250) may be included in the integrated thermal management system (1) as one module together with the reservoir tank (200), or may be included in the integrated thermal management system (1) as a separate module from the reservoir tank (200).

[0152] Figure 15 is a conceptual diagram of an integrated thermal management module including a bypass valve.

[0153] Referring to FIG. 15, an integrated thermal management system (1) according to one embodiment of the present invention may include a valve device (100), a reservoir tank (200), and a bypass valve (500). At least one of the components of the integrated thermal management system (1) illustrated in FIG. 15 has been described above, and therefore, a redundant description thereof will be omitted below.

[0154] The bypass valve (500) can control the flow rate of the coolant bypassed to the valve device (100). The bypass valve (500) can be installed in the bypass path (125). The bypass valve (500) can control the flow rate of the coolant bypassed to the valve device (100) by controlling the area (125S) of the bypass path (125). For example, the bypass valve (500) can increase the flow rate of the coolant bypassed to the valve device (100) by increasing the area (125S) of the bypass path (125). For another example, the bypass valve (500) can decrease the flow rate of the coolant bypassed to the valve device (100) by decreasing the area (125S) of the bypass path (125). Therefore, according to an embodiment of the present invention, the flow rate of cooling water flowing into the interior of the reservoir tank (200) can be controlled without a separate bypass bulkhead.

[0155] A bypass valve (500) may be installed in a bypass passage (125) adjacent to an inlet (200a). According to one embodiment, the bypass valve (500) may be rotatably positioned in a region of the bypass passage (125) to adjust an area (125S) of the bypass passage (125). The operation of the bypass valve (500) may be controlled by a control unit.

[0156] Hereinafter, the operating mode of the bypass valve (500) that controls the flow rate of the cooling water bypassed to the valve device (100) according to the usage environment of the integrated thermal management system (1) will be described with reference to FIGS. 16 to 18.

[0157] Figure 16 is a schematic diagram of an integrated thermal management module including a bypass valve operating in mode 1.

[0158] For example, when the cooling load required in the integrated thermal management system (1) increases, the bypass valve (500) may be operated in the first mode (M1) to block the inlet (200a) of the reservoir tank (200). In this case, the bypass valve (500) may rotate toward the inlet (200a) of the reservoir tank (200).

[0159] As a result, the flow rate of the coolant flowing into the inlet port (121) of the valve device (100) through the bypass path (125) can increase. For example, as illustrated in FIG. 16, the coolant flowing through the bypass path (125) can flow into the valve device (100) without passing through the inlet port (200a) and the outlet port (200b).

[0160] Figure 17 is a schematic diagram of an integrated thermal management module including a bypass valve operating in a second mode.

[0161] For example, when the cooling load required by the integrated thermal management system (1) is reduced or when the amount of air that needs to be separated from the cooling water is large due to the large amount of air contained in the cooling water, the bypass valve (500) may operate in a second mode (M2) that blocks the flow of cooling water flowing into the valve device (100). In this case, the bypass valve (500) may rotate toward the inlet port (121) of the valve device (100).

[0162] As a result, the flow rate of the coolant flowing through the bypass passage (125) to the inlet port (121) of the valve device (100) may be reduced. For example, as illustrated in FIG. 17, all of the coolant flowing through the bypass passage (125) may flow to the reservoir tank (200) and flow to the valve device (100) through the inlet (200a) and the outlet (200b).

[0163] Figure 18 is a schematic diagram of an integrated thermal management module including a bypass valve operating in a third mode.

[0164] The bypass valve (500) can operate in a third mode (M3) that operates between the first mode (M1) and the second mode (M2). In the third mode (M3), the bypass valve (500) can open a portion of the inlet (200a) and also open a portion of the bypass path (125).

[0165] Accordingly, the bypass valve (500) can allow a portion of the coolant to flow into the inlet (200a) while allowing the remainder of the coolant to be bypassed to the inlet port (121) of the valve device (100).

[0166] In this way, according to an embodiment of the present invention, the flow rate of the cooling water bypassed to the valve device (100) can be controlled through various operation modes of the bypass valve (500), so that convenience of use according to various use environments can be increased.

[0167] Any or all of the embodiments of the present disclosure described above are not mutually exclusive or distinct. Any or all of the embodiments of the present disclosure described above may have their respective components or functions combined or used together.

[0168] For example, it means that a configuration A described in a particular embodiment and / or drawing can be combined with a configuration B described in another embodiment and / or drawing. That is, even if a combination between configurations is not directly described, it means that a combination is possible, except in cases where a combination is described as impossible.

[0169] The above detailed description should not be construed as limiting in any respect and should be considered illustrative only. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are intended to be included within the scope of the present invention.

Claims

1. A reservoir body including an internal space through which coolant circulates, an inlet through which the coolant flows in, and an outlet through which the coolant flows out; and A reservoir tank including a bypass bulkhead arranged in the reservoir body to divide the inlet and the outlet, and bypassing a portion of the cooling water flowing into the inlet to a valve device connected to the outlet.

2. In paragraph 1, A coolant line through which the coolant flows is connected to the above reservoir body, A reservoir tank, wherein a portion of the coolant passing through the coolant line is introduced into the inlet by the bypass bulkhead, and the remaining portion is bypassed to the valve device.

3. In paragraph 1, A reservoir tank, wherein the bypass bulkhead extends from the internal space so as to protrude outwardly of the reservoir body and is arranged to cover at least a portion of the bypass path of the valve device connected to the inlet and the outlet.

4. In paragraph 1, A reservoir tank, wherein the bypass bulkhead includes a spiral shape formed along the circumferential direction of the inlet and the outlet, and extends along the direction in which the inlet and the outlet are extended.

5. In paragraph 1, The above bypass bulkhead comprises a first portion facing the valve device and a second portion facing the reservoir tank, A reservoir tank, wherein the first part and the second part are positioned misaligned from each other.

6. In paragraph 1, A reservoir tank further comprising a cap that seals the interior of the reservoir body and is separated from the reservoir body when the internal pressure of the reservoir body exceeds a preset pressure.

7. In paragraph 1, A reservoir tank, wherein the bypass baffle is movably arranged to adjust the area covered by the bypass path of the valve device connected to the inlet and outlet.

8. In paragraph 1, A reservoir tank, wherein the bypass bulkhead is movably arranged to adjust the size of the inlet.

9. In paragraph 1, A reservoir tank, wherein the bypass bulkhead includes a guide surface having a curved surface to guide the flow of the coolant along the inlet.

10. In paragraph 1, A reservoir tank, wherein the bypass bulkhead includes a guide surface having a curved surface to guide the flow of the coolant along the outlet.

11. A reservoir body including an internal space in which coolant circulates, an inlet into which the coolant flows in, and an outlet located at a location spaced from the inlet and through which the coolant flows out; and Including a branch flow path respectively connected to the inlet of the reservoir body and the cooling water line through which the cooling water flows; A reservoir tank, wherein a portion of the coolant passing through the coolant line flows into the inlet through the branch line, and the remaining portion is bypassed to a valve device connected to the outlet.

12. A reservoir tank according to any one of clauses 1 to 11; and An integrated thermal management system comprising a valve device connected to the reservoir tank and including a bypass path through which a portion of the coolant is bypassed.

13. In paragraph 12, An integrated thermal management system, wherein the bypass path comprises a first portion connected to the inlet and blocked by the bypass bulkhead, a second portion connected to the outlet and partitioned from the first portion with the bypass bulkhead interposed therebetween, and a third portion connected to the first portion and the second portion so that the cooling water is bypassed to the valve device.

14. A reservoir tank including an internal space through which coolant circulates, an inlet through which the coolant flows in, and an outlet through which the coolant flows out; a valve device connected to the outlet of the above reservoir tank; and An integrated thermal management system comprising a bypass valve for controlling the flow rate of the coolant bypassed to the valve device.

15. In paragraph 14, The above bypass valve is an integrated thermal management system that controls the flow rate of the cooling water bypassed to the valve device by controlling the area of ​​the bypass path connected to the outlet, the inlet, and the valve device.

16. In paragraph 15, An integrated thermal management system, wherein the bypass valve is rotatably positioned in an area of ​​the bypass path to control the area of ​​the bypass path.

17. In paragraph 14, An integrated thermal management system wherein the above bypass valve operates in a first mode to block the inlet of the above reservoir tank.

18. In paragraph 14, An integrated thermal management system, wherein the above bypass valve operates in a second mode to block the flow of coolant flowing into the valve device.

19. In paragraph 14, An integrated thermal management system wherein the bypass valve operates in a third mode to allow a portion of the coolant to flow into the inlet while allowing the remainder of the coolant to bypass the valve device.

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