Temperature management device

Abstract

A temperature management device for managing the temperature of a temperature management object having a first management object and a second management object by circulating a fluid, the temperature management device comprising: a first pump for conveying a fluid having a first temperature heated by the temperature management object; a second pump that conveys a fluid at a second temperature lower than the first temperature; a first flow path that guides the fluid W having the first temperature conveyed by the first pump to a first management object; a second flow path through which a fluid having a second temperature conveyed by the second pump flows; and a switching flow path which is connected to the first flow path and the second flow path and which switches the temperature of the fluid to be guided to the second management object, and through which the fluid at the first temperature or a fluid at a third temperature obtained by mixing the fluid at the first temperature and the fluid at the second temperature flows.

Description

Technical Field

[0001] The present disclosure relates to temperature management devices. Background Art

[0002] Various technologies for managing the temperature of an internal combustion engine and the like are disclosed. For example, Patent Document 1 discloses a cooling control system comprising: a radiator connected to the engine via a first circulation passage for dissipating heat from cooling water (coolant) flowing in the first circulation passage; and a heater core connected to the engine via a second circulation passage for dissipating heat from cooling water flowing in the second circulation passage. The first circulation passage comprises an outflow passage connecting a cooling water outflow portion provided at an upper portion (cylinder head) of the engine with an inflow portion of the radiator, and an inflow passage connecting the outflow portion of the radiator with a cooling water inflow portion of a lower portion (cylinder block) of the engine. The second circulation passage comprises an outflow passage connecting a cooling water outflow portion provided at an upper portion (cylinder head) of the engine with an inflow portion of the heater core, and an inflow passage connecting the outflow portion of the heater core with an inflow passage of the first circulation passage.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2011-169273 Summary of the Invention

[0006] Problems to be solved by the invention

[0007] When the engine is driven, the temperature of the cylinder head is higher than that of the cylinder block. That is, the temperature changes in different ways in the cylinder head and the cylinder block. Therefore, it is expected that the cylinder head and the cylinder block can be temperature-managed independently. However, in the cooling control system disclosed in Patent Document 1, only a first circulation passage is connected to the cooling water inlet portion where the cooling water flows into the engine, and only the cooling water (cooling water of one temperature) circulating in the first circulation passage flows into the engine. In other words, the cylinder block and the cylinder head manage their temperatures only by using the cooling water flowing into the cooling water inlet portion, and it is impossible to manage the temperatures of the cylinder head and the cylinder block independently. There is room for improvement in the temperature management of temperature-managed objects such as engines.

[0008] The present disclosure has been made in view of the above-mentioned problems, and an object of the present disclosure is to provide a temperature management device capable of managing the temperature of a temperature-managed object in more detail.

[0009] Means used to solve problems

[0010] The temperature management device of the present disclosure is characterized in that the temperature of a temperature-managed object having a first management object and a second management object is managed by circulating a fluid, wherein the device comprises: a first pump for delivering a fluid having a first temperature that is heated by the temperature-managed object; a second pump for delivering a fluid having a second temperature that is lower than the first temperature; a first flow path for guiding the fluid having the first temperature delivered by the first pump toward the first management object; a second flow path for flowing the fluid having the second temperature delivered by the second pump; and a switching flow path connected to the first flow path and the second flow path for switching the temperature of the fluid directed toward the second management object, wherein the fluid having the first temperature or a fluid having a third temperature formed by a mixture of the fluid having the first temperature and the fluid having the second temperature flows through the switching flow path.

[0011] According to this structure, a first flow path, which directs a fluid at a first temperature toward a first managed object, and a switching flow path, which directs a fluid at a second managed object, are separately provided. This allows independent temperature management of the first and second managed objects. Furthermore, by flowing a fluid at the first temperature, or a fluid at a third temperature formed by mixing a fluid at the first temperature with a fluid at the second temperature, through the switching flow path, the temperature of the fluid flowing through the switching flow path can be switched. This allows for more detailed temperature management of the temperature-managed object. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a diagram showing an outline of a temperature management device according to an embodiment.

[0013] Figure 2 It is a diagram showing the configuration of a temperature management unit according to the embodiment.

[0014] Figure 3 It is a diagram showing the configuration of a temperature management unit according to the embodiment.

[0015] Figure 4 It is a diagram showing a switching flow path and its surrounding structure according to the embodiment.

[0016] Figure 5 It is a diagram showing a switching flow path and its surrounding structure according to the embodiment.

[0017] Figure 6 It is a diagram schematically showing a cross section of a switching flow path and its vicinity according to an embodiment.

[0018] Figure 7 It is a diagram showing the structure of a guide flow path according to the embodiment.

[0019] Figure 8 It is a diagram showing a temperature sensor unit according to an embodiment.

[0020] Figure 9 It is a diagram showing the configuration of a merging guide flow path and a temperature sensor according to an embodiment.

[0021] Figure 10 It is a diagram showing a configuration near a switching flow path according to another embodiment.

[0022] Figure 11 It is an enlarged view showing the structure near the switching flow path according to another embodiment. DETAILED DESCRIPTION

[0023] Hereinafter, a temperature management device according to an embodiment of the present disclosure will be described with reference to the accompanying drawings. However, the present disclosure is not limited to the following embodiment, and various modifications are possible without departing from the spirit and scope of the present disclosure.

[0024] Temperature management device

[0025] First, refer to Figure 1 The outline of the temperature management device 100 will be described. Figure 1 As shown, the temperature management device 100 is mounted on a vehicle V such as an automobile. The temperature management device 100 manages the temperature of an engine E (an example of a temperature management target) as an internal combustion engine mounted on the vehicle V.

[0026] In this embodiment, the temperature management device 100 operates in two modes. Specifically, the temperature management device 100 operates in a first mode to increase the temperature of the engine E (warm-up), or in a second mode to bring the temperature of the engine E to a target temperature. Hereinafter, the first mode will be referred to as the "warm-up mode," and the second mode will be referred to as the "temperature adjustment mode."

[0027] The temperature management device 100 includes a temperature management unit 10 that manages the temperature of the engine E and a control unit 20 that controls the operation of the temperature management unit 10 .

[0028] 〔Temperature Management Department〕

[0029] Figure 2 and Figure 3 1 is a diagram showing the structure of the temperature management unit 10. In detail, Figure 2 The temperature management unit 10 in the warm-up mode is shown. Figure 3 The temperature management unit 10 in the temperature adjustment mode is shown.

[0030] like Figure 2 and Figure 3As shown, the temperature management unit 10 manages the temperature of the engine E by circulating cooling water W (an example of fluid). The cooling water W is a cooling fluid such as long-life coolant (LLC).

[0031] The temperature management unit 10 includes a fluid flow path 1 through which coolant W flows, used to manage the temperature of the engine E; a radiator 2 that cools (lowers) the coolant W; a pump 3 that circulates the coolant W through the fluid flow path 1; and a temperature sensor 4 (an example of a sensor) that acquires (measures) the temperature of the coolant W. The radiator 2, pump 3, temperature sensor 4, and engine E are connected via the fluid flow path 1 through which the coolant W flows. Hereinafter, the downstream side of the flow direction of the coolant W flowing through the fluid flow path 1 will be referred to as the "downstream side," and the upstream side will be referred to as the "upstream side."

[0032] Engine E includes a cylinder block EB (an example of a first managed object) and a cylinder head EH (an example of a second managed object). Cylinder block EB is equipped with pistons that generate power using heat energy generated by the combustion of fuel. Cylinder head EH is equipped with intake ports for intake and exhaust ports for exhaust. Cylinder head EH and cylinder block EB form a combustion chamber. When engine E is driven, fuel combustion in the combustion chamber generates heat. When engine E is driven, cylinder head EH generates a higher temperature than cylinder block EB.

[0033] The engine E is provided with an engine inlet E1 for allowing cooling water W to flow from the fluid flow path 1 into the engine E, and an engine outlet E2 for allowing cooling water W to flow out of the engine E to the fluid flow path 1. The engine inlet E1 includes a first engine inlet E11 connected to the cylinder block EB and a second engine inlet E12 connected to the cylinder head EH.

[0034] The cooling water W that flows into the cylinder block EB through the first engine inlet E11 flows from the cylinder block EB to the cylinder head EH through the engine internal flow path EL formed inside the engine E. The cooling water W that has flowed into the cylinder head EH flows out through the engine outlet E2 to the fluid flow path 1. Furthermore, the cooling water W that has flowed into the cylinder head EH through the second engine inlet E12 flows out through the engine outlet E2 to the fluid flow path 1.

[0035] The radiator 2 is a heat exchanger that cools the cooling water W by exchanging heat between air or the like and the cooling water W.

[0036] The pump 3 circulates the cooling water W in the fluid flow path 1 by delivering the cooling water W. In this embodiment, the pump 3 is an electric water pump including an electric motor (not shown) and an impeller (not shown) driven by the power from the electric motor. The pressure (discharge rate) of the pump 3 is determined by referring to Figure 1 The control unit 20 described above controls the operation of the electric motor (the rotation speed of the impeller) to change.

[0037] The pump 3 includes a first pump 31 that delivers coolant W at a first temperature after being heated by the engine E, and a second pump 32 that delivers coolant W at a second temperature after being cooled by the radiator 2. The first temperature is, for example, 90°C to 95°C, and the second temperature is, for example, 0°C to 40°C (equivalent to the outside air). Because the second temperature is lower than the first temperature, the first temperature will sometimes be referred to as "high temperature" and the second temperature as "low temperature" below.

[0038] The temperature sensor 4 measures the temperature of the cooling water W and outputs information indicating the measured temperature. The control unit 20 controls the operation (pressure) of the pump 3 based on the information indicating the temperature of the cooling water W and the calorific value of the engine E output from the temperature sensor 4. The control unit 20 also obtains the calorific value of the engine E based on information indicating the engine E's rotational speed, the engine E's load factor, and the like.

[0039] The fluid flow path 1 includes a high-temperature flow path 11 (an example of a first flow path) for flowing cooling water W at a first temperature (high temperature), a low-temperature flow path 12 (an example of a second flow path) for flowing cooling water W at a second temperature (low temperature) cooled by the radiator 2, a switching flow path 13 for switching the temperature of the flowing cooling water W, and a guide flow path 14 for guiding the cooling water W to the temperature sensor 4. Figure 2 and Figure 3 In order to distinguish the temperatures of the cooling water W, the first temperature of the cooling water W is indicated by a dotted line, and the second temperature of the cooling water W is indicated by a dashed line. Furthermore, the third temperature (mixed temperature) of the cooling water W obtained by mixing the first temperature of the cooling water W and the second temperature of the cooling water W is indicated by a double-dashed line (see FIG. Figure 3 ).

[0040] A first pump 31 is connected to the high-temperature flow path 11. The high-temperature flow path 11 guides the cooling water W at a first temperature, which is delivered by the first pump 31, to the cylinder block EB. The high-temperature flow path 11 includes: a first high-temperature flow path 111 connected to the engine E (engine outlet E2) on the upstream side and to the first pump 31 on the downstream side; a second high-temperature flow path 112 connected to the first pump 31 on the upstream side and to the switching flow path 13 on the downstream side; a third high-temperature flow path 113 connected to the switching flow path 13 on the upstream side and to the cylinder block EB of the engine E (first engine inlet E11) on the downstream side; and a fourth high-temperature flow path 114 connected to the first high-temperature flow path 111 on the upstream side and to the radiator 2 on the downstream side.

[0041] Specifically, the first high-temperature flow path 111 guides the cooling water W from the engine E to the first pump 31, the second high-temperature flow path 112 guides the cooling water W from the first pump 31 to the switching flow path 13. The third high-temperature flow path 113 guides the cooling water W from the switching flow path 13 to the cylinder block EB, and the fourth high-temperature flow path 114 guides the cooling water W branching from the first high-temperature flow path 111 to the radiator 2.

[0042] A second pump 32 is connected to the low-temperature flow path 12. Cooling water W at a second temperature, delivered by the second pump 32, flows through the low-temperature flow path 12. The low-temperature flow path 12 includes a first low-temperature flow path 121, which is connected to the radiator 2 on its upstream side and to the second pump 32 on its downstream side; and a second low-temperature flow path 122, which is connected to the second pump 32 on its upstream side and to the switching flow path 13 on its downstream side. In other words, the first low-temperature flow path 121 directs the cooling water W from the radiator 2 to the second pump 32, while the second low-temperature flow path 122 directs the cooling water W from the second pump 32 to the switching flow path 13.

[0043] Switching flow path 13 is connected to second high-temperature flow path 112, third high-temperature flow path 113, low-temperature flow path 12 (second low-temperature flow path 122), and cylinder head EH (second engine inlet E12). Switching flow path 13 switches the temperature of the flowing cooling water W (cooling water W directed to cylinder head EH) according to the operating mode of temperature management device 100.

[0044] In detail, Figure 2 In the warm-up mode shown, the cooling water W at the first temperature flows in the switching flow path 13. Figure 3 In the temperature adjustment mode shown, cooling water W at a third temperature, which is a mixture of cooling water W at a first temperature and cooling water W at a second temperature, flows through the switching flow path 13 . That is, cooling water W at the first temperature or cooling water W at the third temperature flows through the switching flow path 13 .

[0045] [Structure near the switching flow path]

[0046] Next, refer to Figures 4 to 6 The switching flow path 13 and its vicinity will be described. Figure 4 and Figure 5 1 is a diagram showing the switching flow path 13 and its vicinity. Figure 6 1 is a diagram schematically showing a cross section of the switching flow path 13 and its vicinity cut in the horizontal direction. Figure 4 and Figure 5 The direction from top to bottom in is equivalent to the direction along the vertical direction.

[0047] like Figure 4 and Figure 5As shown, the switching flow path 13 extends in a horizontal direction perpendicular to the vertical direction. The third high temperature flow path 113 connected to the switching flow path 13 extends upwardly at an angle with the switching flow path 13 as the base end (see also Figure 5 ).

[0048] The second low-temperature flow path 122 is connected to a portion of the switching flow path 13 that is downstream of the connection portion P1 with the second high-temperature flow path 112. The second low-temperature flow path 122 extends in the vertical direction and is connected to the switching flow path 13 perpendicular to the direction in which the switching flow path 13 extends. Thus, cooling water W (cooling water W with a relatively low dynamic pressure among the high-temperature cooling water W flowing into the switching flow path 13) other than the mainstream of the first-temperature cooling water W flowing from the second high-temperature flow path 112 into the switching flow path 13 is opposed by the second-temperature cooling water W flowing in the second low-temperature flow path 122, thereby suppressing the first-temperature cooling water W from flowing into the second low-temperature flow path 122.

[0049] In addition, if Figure 4 As shown, the second low-temperature flow path 122 is connected to the switching flow path 13 from the vertically lower side. Specifically, the temperature management device 100 is arranged (vertically) in the vehicle V such that the second high-temperature flow path 112 is connected to the switching flow path 13 from the vertically lower side. Consequently, gravity acts on the second-temperature coolant W flowing through the second low-temperature flow path 122, suppressing the flow of the second-temperature coolant W into the switching flow path 13, the second high-temperature flow path 112, and the third high-temperature flow path 113, which are located above the second low-temperature flow path 122. Furthermore, the difference in specific gravity between the first-temperature coolant W and the second-temperature coolant W can also suppress the flow of the first-temperature coolant W into the second low-temperature flow path 122.

[0050] The second high-temperature flow path 112 includes a flow rate adjusting portion 112 a on the upstream side of the connection portion P 1 . The flow rate adjusting portion 112 a is inclined so that the upper portion thereof approaches the switching flow path 13 .

[0051] like Figure 6 As shown, the flow rate adjusting portion 112 a includes a first wall surface H1 located on a side where the third high-temperature flow path 113 extends when viewed in the vertical direction, and a second wall surface H2 opposite to the first wall surface H1 .

[0052] When viewed in the vertical direction, the first wall surface H1 extends parallel to the direction in which the switching flow path 13 extends, i.e., the flow direction of the cooling water W. The second wall surface H2 is configured so that, when viewed in the vertical direction, the upstream side (the side farther from the connection portion P1) is closer to the first wall surface H1, and the downstream side (the side closer to the connection portion P1) is farther away from the first wall surface H1. Hereinafter, the portion where the second wall surface H2 is closer to the first wall surface H1 (the portion comprising the first wall surface H1 and the second wall surface H2) is referred to as the "contracted portion 112b," and the portion where the second wall surface H2 is farther from the first wall surface H1 (the portion comprising the first wall surface H1 and the second wall surface H2) is referred to as the "expanded portion 112c."

[0053] The narrowing portion 112b is located upstream of the connecting portion P1 (the expanding portion 112c). The narrowing portion 112b is configured to reduce the cross-sectional area of ​​the flow path through which the cooling water W flows (hereinafter referred to as the "flow path cross-sectional area") relative to the upstream side of the narrowing portion 112b of the second high-temperature flow path 112 (the portion immediately upstream of the narrowing portion 112b), thereby increasing the flow rate of the portion of the cooling water W flowing into the switching flow path 13. Specifically, the narrowing portion 112b is configured to increase the flow rate of the portion of the cooling water W flowing into the switching flow path 13 and the portion of the cooling water W flowing in the second high-temperature flow path 112 that flows on the first wall surface H1 (the third high-temperature flow path 113). This increase in the flow rate of the cooling water W pushes the second-temperature cooling water W in the switching flow path 13 toward the side opposite the third high-temperature flow path 113, thereby suppressing the flow of the second-temperature cooling water W into the third high-temperature flow path 113. That is, the narrowing portion 112 b constitutes a shutoff mechanism capable of shutting off the flow of the cooling water W at the second temperature into the high-temperature flow path 11 .

[0054] The expansion portion 112c is located downstream of the reduction portion 112b and upstream of the connection portion P1. The expansion portion 112c is configured so that the cross-sectional area of ​​the flow path through which the cooling water W flows is larger than that of the reduction portion 112b. The expansion portion 112c is configured so that the cooling water W that has passed through the expansion portion 112c expands radially when flowing into the switching flow path 13, colliding with the third wall surface H3 constituting the switching flow path 13 and swirling. Specifically, the expansion portion 112c is configured so that at least a portion of the cooling water W that flows into the switching flow path 13, other than the cooling water W with an increased flow rate, and the cooling water W that flows on the side of the second wall surface H2 (opposite to the third high-temperature flow path 113), collides with the third wall surface H3 constituting the switching flow path 13 and swirls. In other words, the expansion portion 112c and the third wall surface H3 constituting the switching flow path 13 constitute a swirl generating portion that causes the cooling water W to swirl. Furthermore, the cooling water W swirls around the extending direction of the switching flow path 13 as an axis.

[0055] 〔Guiding flow path〕

[0056] Next, refer to Figures 2 and 3 as well as Figures 7 and 8 The structure of the guide flow path 14 will be described. Figure 7 14 is a diagram showing the structure of the guide flow path 14. In detail, Figure 7 The switching flow path 13 is extended in a horizontal direction and is viewed from the opposite side in a direction perpendicular to the direction in which the switching flow path 13 extends. Figure 4 The switching flow path 13 and its vicinity are shown. Figure 8 1 is a diagram showing a temperature sensor unit U in which the guide flow path 14 and the temperature sensor 4 are integrated.

[0057] like Figure 2 and Figure 3 As shown, the guide flow path 14 is provided at a position downstream of the second pump 32. The guide flow path 14 includes: a first guide flow path 141 connected to the switching flow path 13; a second guide flow path 142 connected to the second low-temperature flow path 122; a confluent guide flow path 143 where the first guide flow path 141 and the second guide flow path 142 merge; and a reflux guide flow path 144 connected between the second pump 32 and the radiator 2 (the first low-temperature flow path 121). In addition, Figure 2 and Figure 3 In order to avoid complication of the figure, the first guide flow path 141 is connected to the switching flow path 13 at a position Q1 upstream of the portion connected to the second high-temperature flow path 112. However, in reality, Figure 7 As shown, the first guide flow path 141 is connected to the switching flow path 13 at a position Q2 downstream of a portion of the switching flow path 13 connected to the second high-temperature flow path 112 .

[0058] The temperature sensor 4 is disposed in the merging guide flow path 143. The temperature sensor 4 acquires the temperature of the cooling water W flowing in the merging guide flow path 143 and outputs information indicating the temperature.

[0059] like Figure 7 and Figure 8 As shown, the guide flow path 14 is formed by a groove S formed in the first wall G1 and the second wall G2 and a cover C covering the groove S (see Figure 8 ). The cover C covers the groove S, thereby forming a first guide flow path 141, a second guide flow path 142, a merging guide flow path 143, and a return guide flow path 144. The first wall G1 forms the high-temperature flow path 11, the low-temperature flow path 12, and the switching flow path 13. The second wall G2 protrudes from the first wall G1. Specifically, the second wall G2 includes a first extension portion G3 extending in the direction in which the switching flow path 13 extends, and a second extension portion G4 extending in a direction orthogonal to the first extension portion G3.

[0060] like Figure 7 and Figure 8As shown, the temperature sensor 4 includes a temperature sensing portion 41 disposed between the groove S (the groove S formed in the first extension portion G3 of the second wall G2) that constitutes the converging guide flow path 143 and the cover C (inserted into the groove S). The temperature sensing portion 41 is the portion of the temperature sensor 4 that measures the temperature of the cooling water W.

[0061] In addition, if Figure 7 As shown, the length of the first guide flow path 141 is configured to be the same as the length of the second guide flow path 142. Furthermore, the length of the first guide flow path 141 is the length between the first guide flow inlet 14H1, the inlet for the cooling water W of the first guide flow path 141, and the connection point P2. The length of the second guide flow path 142 is the length between the second guide flow inlet 14H2, the inlet for the cooling water W of the second guide flow path 142, and the connection point P2. Furthermore, the connection point P2 indicates the location where the first guide flow inlet 14H1 and the second guide flow inlet 14H2 connect to the merging guide flow path 143, that is, the location where the first guide flow inlet 14H1 and the second guide flow inlet 14H2 merge.

[0062] Furthermore, the flow path cross-sectional areas of the first and second guide inlets 14H1, 14H2 are smaller than those on the upstream side of the first and second guide inlets 14H1, 14H2 (the areas immediately upstream of the first and second guide inlets 14H1, 14H2). In other words, the first and second guide inlets 14H1, 14H2 are configured to increase the pressure loss of the cooling water W. The sizes of the first and second guide inlets 14H1, 14H2 are set so that the difference between the first and second pressure differences is negligible. Specifically, the sizes of the first and second guide inlets 14H1, 14H2 are set small enough so that the difference between the first and second pressure differences is negligible (the shape (orifice shape) in which the flow path cross-sectional areas are smaller than those immediately upstream of the first and second guide inlets 14H1, 14H2). The first pressure difference is the difference in pressure between the cooling water W at the first guide inlet 14H1 and the guide outlet 14H3, and the second pressure difference is the difference in pressure between the cooling water W at the second guide inlet 14H2 and the guide outlet 14H3. Furthermore, the guide flow outlet 14H3 is the outlet for the cooling water W from the guide flow path 14. In this embodiment, the flow path cross-sectional areas of the first guide flow path 141, the second guide flow path 142, the merging guide flow path 143, and the return flow guide flow path 144 are constant and equal. Furthermore, the flow path cross-sectional area of ​​the first guide flow path 141 is equal to that of the first guide inlet 14H1, the flow path cross-sectional area of ​​the second guide flow path 142 is equal to that of the second guide inlet 14H2, and the flow path cross-sectional area of ​​the return flow guide flow path 144 is equal to that of the guide flow outlet 14H3.

[0063] The first guide inlet 14H1 is also set to a size that can suppress a decrease in the warm-up (temperature-raising) performance of the engine E due to a decrease in the supply of the first-temperature coolant W to the engine E caused by the coolant W at the first temperature flowing into the guide flow path 14 .

[0064] Furthermore, the first guide inlet 14H1 and the second guide inlet 14H2 are also secured to such an extent that they will not be clogged even if the cooling water W contains foreign matter.

[0065] Furthermore, the first guide inlet 14H1 and the second guide inlet 14H2 are also set to a size that ensures that the flow rate of the cooling water W that can be measured by the temperature sensor 4 is greater than the lower limit value (a flow rate that depends on the performance of the temperature sensor 4 and is the minimum value of the flow rate of the cooling water W that can measure the temperature of the cooling water W). The lower limit value of the flow rate of the cooling water W that can be measured by the temperature sensor 4 is, for example, 0.2 L / min.

[0066] Figure 9 14 is a diagram showing the structure of the converging guide flow path 143 and the temperature sensor 4. In detail, Figure 9 143 is a diagram showing a cross section of the confluent guide flow path 143 cut along the flow direction of the cooling water W. Figure 9 As shown, the temperature sensing portion 41 of the temperature sensor 4 includes a rectangular temperature sensing surface 41S that senses the temperature of the cooling water W. In this embodiment, the temperature sensing surface 41S is arranged to extend along the flow direction of the cooling water W.

[0067] The merging guide flow path 143 includes a protrusion 143t that projects toward the temperature sensor 4. The protrusion 143t is provided on the inner wall 143s of the merging guide flow path 143, surrounding the temperature sensor 4. When viewing the temperature sensing surface 41S from a direction perpendicular to the inner wall 143s, the protrusion 143t has a fan-shaped shape (a fan-shaped shape with a central angle of 90 degrees or approximately 90 degrees) with the upstream side being an arc.

[0068] The projection 143 t causes the cooling water W flowing along the inner wall 143 s constituting the merging guide flow path 143 to collide with, ie, come into contact with, the temperature sensor 4 .

[0069] In this embodiment, 32 protrusions 143t are provided. Eight of the 32 protrusions 143t are provided along the circumference of the inner wall 143s that constitutes the converging guide flow path 143. Four rows are arranged along the flow direction of the cooling water W, and the protrusions 143t are staggered when viewed in the flow direction. The eight protrusions 143t located on the most upstream side (the first row) are arranged so that their downstream ends coincide with the upstream end of the temperature sensor 4 (temperature sensing portion 41). The remaining three rows of protrusions 143t on the downstream side are arranged at predetermined intervals. Specifically, the protrusions 143t in the fourth row (the eight located on the most downstream side) of the protrusions 143t are arranged so that their downstream ends coincide with the downstream end of the temperature sensing portion 41 in the flow direction. The remaining two rows are arranged at equal intervals from the first and fourth rows.

[0070] [Control Department]

[0071] Figure 1 The control unit 20 shown is an engine control unit (ECU) and includes a processor such as a CPU (Central Processing Unit) and a storage area such as a semiconductor memory. The control unit 20 controls the operation of each unit (pump 3) of the temperature management device 100 by executing a control program stored in the storage area. Figure 2 The control of the pump 3 is switched between the warm-up mode and the temperature adjustment mode described.

[0072] Specifically, in the warm-up mode, the control unit 20 controls the pressure (discharge rate) of the first pump 31 and the pressure (discharge rate) of the second pump 32 so that the interface F between the cooling water W at the first temperature (the cooling water W flowing in the switching flow path 13) and the cooling water W at the second temperature (the cooling water W flowing in the second low-temperature flow path 122) is formed at a position between the first guide inlet 14H1 and the second guide inlet 14H2 (the middle point) (refer to FIG. Figure 7 Hereinafter, as the formation position of the interface F, the target position (in this embodiment, the midpoint between the first guide inlet 14H1 and the second guide inlet 14H2) is referred to as a "target position."

[0073] The control unit 20 determines whether the temperature indicated by the information output from the temperature sensor 4 (hereinafter referred to as “acquired temperature”) is higher than the average temperature of the first and second temperatures, and controls the pressure of the pump 3 based on the determination result.

[0074] For example, when the control unit 20 determines that the acquired temperature is higher than the average temperature, that is, the position where the interface F is formed is on the upstream side (low-temperature flow path 12 (second low-temperature flow path 122) side) of the target position, the pressure of the second pump 32 is increased. On the other hand, if it is determined that the acquired temperature is lower than the average temperature, that is, the position where the interface F is formed is on the downstream side (switching flow path 13 side) of the target position, the pressure of the second pump 32 is reduced. In addition, when the control unit 20 determines that the acquired temperature is equal to the average temperature, that is, when it is determined that the position where the interface F is formed is the target position, the pressure of the second pump 32 is not changed. In addition, even in the case of the vehicle V (refer to Figure 1 ) is tilted forward, backward, left, and right, the control unit 20 also controls the operation of the pump 3 in such a way that the interface F is not formed inside the second high-temperature flow path 112 and the third high-temperature flow path 113, and the second guide inlet 14H2 is set at a position lower than the position where the interface F is formed (refer to Figure 7 ).

[0075] By forming an interface F between the first guide inlet 14H1 and the second guide inlet 14H2, the cooling water W at the second temperature is prevented from flowing into the second high-temperature flow path 112 and the third high-temperature flow path 113. In other words, the control unit 20, the first pump 31, and the second pump 32 constitute a shutoff mechanism capable of shutting off the flow of the cooling water W at the second temperature into the high-temperature flow path 11.

[0076] Furthermore, since the interface F is formed between the first guide inlet 14H1 and the second guide inlet 14H2 , only the cooling water W at the first temperature flows into the engine E via the first engine inlet E11 and the second engine inlet E12 . As a result, the engine E can be warmed up efficiently.

[0077] On the other hand, in the temperature adjustment mode, the controller 20 controls the pressures of the first pump 31 and the second pump 32 so that the cooling water W at the first temperature and the cooling water W at the second temperature are mixed in the switching flow path 13. Specifically, the controller 20 controls the pressures of the first pump 31 and the second pump 32 so that the cooling water W at the third temperature, which is a mixture of the cooling water W at the first temperature and the cooling water W at the second temperature, flows into the switching flow path 13. By controlling the pressures of the pumps 3 as described above, the cooling water W at the third temperature flows into the first guide flow path 141, and the cooling water W at the second temperature flows into the second guide flow path 142.

[0078] The control unit 20 controls the operation of the pump 3 by, for example, referring to pump control information (pump map) indicating information related to the control of the pump 3. The pump control information is pre-created by, for example, the designer of the temperature management device 100 and stored in a storage area of ​​the control unit 20. The pump control information is, for example, information indicating the correlation between the calorific value of the engine E, the first target temperature of the cooling water W flowing into the cylinder head EH, and the target temperature of the cooling water W flowing out of the engine outlet E2 of the engine E (hereinafter referred to as the "second target temperature"). The second target temperature is, for example, 95 degrees Celsius. The control unit 20 refers to the pump control information and obtains the first target temperature based on the second target temperature and the calorific value of the engine E.

[0079] The control unit 20 may also determine whether the third temperature is higher than the first target temperature, which is the target temperature of the cooling water W flowing into the cylinder head EH, and control the pressure (driving force) of the pump 3 based on the determination result. The third temperature is obtained based on the information indicating the temperature output by the temperature sensor 4 and the information indicating the second temperature (the temperature of the cooling water W flowing out of the radiator 2).

[0080] If the control unit 20 determines that the third temperature is higher than the first target temperature, it increases the pressure of the second pump 32. On the other hand, if the control unit 20 determines that the third temperature is lower than the first target temperature, it reduces the pressure of the second pump 32. Consequently, the cooling water W, whose temperature has been adjusted to the first target temperature, flows from the second engine inlet E12 into the cylinder head EH via the switching flow path 13. Furthermore, if the control unit 20 determines that the third temperature is equal to the first target temperature, it does not change the pressure of the second pump 32.

[0081] [Effects of the Implementation Method]

[0082] As described above, according to this embodiment, the high-temperature flow path 11 (third high-temperature flow path 113) that guides high-temperature (first-temperature) cooling water W to the cylinder block EB and the switching flow path 13 that guides it to the cylinder head EH are separately provided. This allows independent temperature management of the cylinder block EB and the cylinder head EH. Furthermore, in warm-up mode and temperature adjustment mode, the first-temperature cooling water W or the third-temperature cooling water W, a mixture of the first-temperature cooling water W and the second-temperature cooling water W, flows through the switching flow path 13. In other words, the temperature of the cooling water W flowing through the switching flow path 13 can also be switched. This allows for more precise temperature management of the engine E.

[0083] In addition, according to this embodiment, the low-temperature flow path 12 (second low-temperature flow path 122) is connected to the switching flow path 13 from the lower side in the vertical direction perpendicular to the horizontal direction, so it is easy to control (suppress) the flow of cooling water W flowing in the low-temperature flow path 12 into the switching flow path 13. Figure 2 ), the temperature of the cooling water W guided to the cylinder head EH via the switching flow path 13 is easily managed (maintaining the temperature of the cooling water W at the first temperature), enabling more detailed management of the temperature of the cylinder head EH. Furthermore, in the warm-up mode, the cooling water W at the first temperature flowing through the cylinder head EH can be prevented from flowing into the low-temperature flow path 12 (second low-temperature flow path 122), thereby preventing a decrease in warm-up performance.

[0084] Furthermore, according to this embodiment, the flow of the cooling water W flowing in the low-temperature flow path 12 into the high-temperature flow path 11 can be shut off by the reduction portion 112b, the control unit 20, the first pump 31, and the second pump 32 serving as the shutoff mechanism. This facilitates temperature management of the cooling water W directed to the cylinder block EB (maintaining the temperature of the cooling water W at the first temperature), enabling more precise temperature management of the cylinder block EB.

[0085] Furthermore, according to this embodiment, the narrowing portion 112b is configured to increase the flow velocity of the portion of the cooling water W flowing into the switching flow path 13 and the portion of the cooling water W flowing in the second high-temperature flow path 112 that flows on the first wall surface H1 (third high-temperature flow path 113). This increased flow velocity of the cooling water W is used to suppress the flow of the cooling water W at the second temperature into the third high-temperature flow path 113 in the switching flow path 13. As a result, the temperature of the cooling water W directed to the cylinder block EB is facilitated (maintaining the temperature of the cooling water W at the first temperature), enabling more precise temperature management of the cylinder block EB.

[0086] Furthermore, according to this embodiment, the expanded portion 112c is configured so that the cooling water W flowing into the switching flow path 13 collides with the third wall surface H3 constituting the switching flow path 13 and swirls. This effectively mixes the cooling water W at the first temperature with the cooling water W at the second temperature, thereby achieving a uniform temperature distribution of the cooling water W flowing through the switching flow path 13. Consequently, in the temperature adjustment mode, the temperature of the cooling water W at the third temperature flowing from the switching flow path 13 via the first guide flow path 141 into the merging guide flow path 143 is maintained constant. As a result, the temperature of the cooling water W (the third temperature) acquired by the temperature sensor 4 becomes more accurate.

[0087] Furthermore, according to this embodiment, the length of the first guide flow path 141 is configured to be the same as the length of the second guide flow path 142. This allows the flow rate of the cooling water W flowing through the first guide flow path 141 to be equal to the flow rate of the cooling water W flowing through the second guide flow path 142. Consequently, the temperature sensor 4 disposed in the merging guide flow path 143 can obtain the average value of the temperature of the cooling water W flowing through the first guide flow path 141 and the temperature of the cooling water W flowing through the second guide flow path 142. As a result, the temperature of the cooling water W flowing through the first guide flow path 141 and the temperature of the cooling water W flowing through the second guide flow path 142 can be more accurately obtained. Consequently, the temperature of the engine E can be more precisely managed.

[0088] Furthermore, according to this embodiment, the first guide inlet 14H1 and the second guide inlet 14H2 are configured so that the cross-sectional area of ​​the flow paths of the first guide inlet 14H1 and the second guide inlet 14H2 is reduced, that is, the pressure loss of the cooling water W is increased. Therefore, the flow rate of the cooling water W flowing into the first guide flow path 141 and the flow rate of the cooling water W flowing into the second guide flow path 142, which merge into the guide flow path 143, can be made equal. In particular, by setting the sizes of the first guide inlet 14H1 and the second guide flow path 14H2 to a size that is small enough to negligibly affect the difference between the first and second pressure differences, the flow rates of the cooling water W flowing through the first guide flow path 141 and the second guide flow path 142 can be made equal.

[0089] The cooling water W is heated by contact with the temperature sensor 4 and heat exchange with the temperature sensor 4. Therefore, if the merging guide flow path 143 is not provided with the protrusion 143t, the cooling water W that has been heated by heat exchange with the temperature sensor 4 will flow along the temperature sensor 4 (temperature sensing portion 41), and the temperature of the cooling water W measured by the temperature sensor 4 may become inaccurate. However, according to this embodiment, the cooling water W that has not undergone heat exchange with the temperature sensor 4 (fresh cooling water W) is guided to the protrusion 143t and comes into contact with the temperature sensor 4. Furthermore, at the same time, the cooling water W that has been heated by heat exchange with the temperature sensor 4 is squeezed away from the temperature sensor 4 (temperature sensing portion 41). This increases the amount of heat transfer between the temperature sensor 4 and the cooling water W. As a result, even if the flow rate of the cooling water W flowing through the merging guide flow path 143 is at the lower limit of the flow rate that the temperature sensor 4 can measure (the measurement that depends on the performance of the temperature sensor 4 can be performed), the temperature of the cooling water W can still be accurately measured.

[0090] Furthermore, according to this embodiment, since the guide flow path 14 is composed of the groove S and the cover C covering the groove S, the guide flow path 14 and the temperature sensor 4 can be simply configured. Furthermore, since the temperature sensor 4 only needs to be arranged between the groove S and the cover C, the temperature sensor 4 can be easily assembled.

[0091] Furthermore, according to this embodiment, the controller 20 controls the operation of the first pump 31 and the second pump 32 in warm-up mode so that the interface F between the cooling water W at the first temperature and the cooling water W at the second temperature is formed between the first guide inlet 14H1 and the second guide inlet 14H2. This allows for more accurate acquisition of the temperature of the cooling water W. Consequently, the temperature of the engine E can be more precisely managed.

[0092] [Other Implementation Methods]

[0093] The present disclosure may be configured as follows other than the above-described embodiment (portions having the same functions as those in the embodiment are denoted by the same reference numerals and signs as those in the embodiment).

[0094] (1) For example, Figure 10 As shown, the second high-temperature flow path 112 may also include a branch portion 112B, and the branch portion 112B is connected to the switching flow path 13. The branch portion 112B is inclined upward as it approaches the switching flow path 13. As a result, it is possible to suppress the cooling water W at the first temperature from flowing into the second low-temperature flow path 122, and it is possible to suppress the reduction in the warm-up performance of the engine E. In addition, Figure 10 The direction from top to bottom in is equivalent to the direction along the vertical direction.

[0095] In addition, if Figure 11 As shown, in order to more efficiently stir the cooling water W flowing into the switching flow path 13, a baffle 112J and a stirring portion 112K for improving the stirring performance of the cooling water W in the stirring tank 112T may be provided inside the second high-temperature flow path 112 (branch portion 112B). The stirring portion 112K may also be provided at Figure 6 The flow rate adjustment unit 112a is described.

[0096] (2) In this embodiment, the case where the cooling water W through the temperature sensor 4 flows back between the radiator 2 and the second pump 32 is described, but the cooling water W through the temperature sensor 4 can also flow back to a position in the first high-temperature flow path 111 that is upstream of the first pump 31 and downstream of the branch point with the fourth high-temperature flow path 114.

[0097] (3) In this embodiment, the engine E is described as an example of a temperature management target, but the temperature management target is not limited to the engine E. The temperature management target may be, for example, a rechargeable battery such as a nickel-metal hydride battery or a lithium-ion battery, or a fuel cell that generates electricity through a chemical reaction.

[0098] (4) In this embodiment, cooling water W is used as an example of the fluid. However, the fluid may be a fluid other than cooling water W, such as insulating oils such as paraffin, or refrigerants such as hydrofluorocarbons (HFCs) and hydrofluoroolefins (HFOs).

[0099] (5) In this embodiment, the switching flow path 13 is described as extending horizontally. However, the switching flow path 13 may not extend horizontally, and may be inclined relative to the horizontal direction, for example. Furthermore, the second low-temperature flow path 122 is not limited to being connected to the switching flow path 13 from the vertically lower side, and may be connected to the switching flow path 13 from an oblique downward direction, for example.

[0100] (6) The second high-temperature flow path 112 may omit the contraction portion 112b, and the shutoff mechanism may be configured only by controlling the pump 3. In addition, the second high-temperature flow path 112 may omit the expansion portion 112c.

[0101] (7) The first guide flow path 141 and the second guide flow path 142 only need to be configured so that the flow rate of the cooling water W flowing therein is equal, and they do not need to be configured to have the same length. Furthermore, the sizes of the first guide inlet 14H1 and the second guide inlet 14H2 also only need to be configured so that the flow rate of the cooling water W flowing therein is equal, and the flow path cross-sectional area does not need to be smaller than that upstream of the first guide inlet 14H1 and the second guide inlet 14H2.

[0102] (8) In this embodiment, the case where 32 protrusions 143t are provided is described, but the number of protrusions 143t can be appropriately changed. Specifically, the number of protrusions 143t provided in the circumferential direction is not limited to 8, but may be 4, 6, etc., and the number of protrusions 143t provided in the flow direction is not limited to four rows, but may be six rows, eight rows, etc. In addition, the eight protrusions 143t located on the most upstream side may not be provided so that their downstream ends coincide with the upstream end of the temperature sensor 4 (temperature sensing portion 41). In addition, the downstream end of the protrusion 143t located on the most downstream side (the fourth row) may not coincide with the downstream end of the temperature sensing portion 41. Furthermore, the eight protrusions 143t may not be provided at equal intervals along the flow direction. Alternatively, the protrusions 143t may be omitted from the confluence guide flow path 143. In addition, the shape of the temperature sensing surface 41S is not limited to a rectangular shape. The shape of the temperature sensing surface 41S may be, for example, an elliptical shape, a circular shape, a fan shape, etc.

[0103] (9) In the present embodiment, the guide flow path 14 is composed of the groove S and the cover C. However, the guide flow path 14 may be composed of a cylindrical pipe or the like, and the temperature sensor 4 may be arranged (inserted) inside the pipe.

[0104] (10) In the present embodiment, in the warm-up mode, the control unit 20 controls the position of the interface F to the target position by adjusting the pressure of the second pump 32. However, the control unit 20 may also control the position of the interface F to the target position by changing the pressure of the first pump 31. Alternatively, the position of the interface F may be controlled to the target position by changing both the pressure of the first pump 31 and the pressure of the second pump 32. Similarly, in the temperature adjustment mode, only the pressure of the first pump 31 may be changed, or both the pressure of the first pump 31 and the pressure of the second pump 32 may be changed, so that the cooling water W at the first temperature and the cooling water W at the second temperature are mixed in the switching flow path 13.

[0105] (11) In this embodiment, the flow path cross-sectional areas of the first guide flow path 141, the second guide flow path 142, the merging guide flow path 143, and the return flow guide flow path 144 are described as being constant and equal to each other. However, the flow path cross-sectional areas of the first guide flow path 141, the second guide flow path 142, the merging guide flow path 143, and the return flow guide flow path 144 may not be constant or may not be equal to each other. However, it is preferable that the flow path cross-sectional area of ​​the first guide flow path 141 and the flow path cross-sectional area of ​​the second guide flow path 142 are constant and equal to each other. In addition, the flow path area of ​​the first guide flow path 141 may be different from that of the first guide inlet 14H1, the flow path area of ​​the second guide flow path 142 may be different from that of the second guide inlet 14H2, and the flow path area of ​​the return flow guide flow path 144 may be different from that of the guide outlet 14H3.

[0106] In the above-mentioned embodiment, the following configurations are conceivable.

[0107] (1) The temperature management device 100 according to the present disclosure is characterized in that it manages the temperature of an engine E having a cylinder block EB (a first management target) and a cylinder head EH (a second management target) by circulating a fluid W. The temperature management device 100 includes: a first pump 31 for delivering the fluid W at a first temperature heated by the engine E; a second pump 32 for delivering the fluid W at a second temperature lower than the first temperature; a high-temperature flow path 11 (first flow path) for guiding the fluid W at the first temperature delivered by the first pump 31 to the cylinder block EB (the first management target); a low-temperature flow path 12 (second flow path) for allowing the fluid W at the second temperature delivered by the second pump 32 to flow; and a switching flow path 13 connected to the high-temperature flow path 11 (first flow path) and the low-temperature flow path 12 (second flow path) for switching the temperature of the fluid W directed to the cylinder head EH (the second management target), wherein the fluid W at the first temperature or the fluid W at a third temperature obtained by mixing the fluid W at the first temperature and the fluid W at the second temperature flows through the switching flow path 13.

[0108] According to this configuration, the high-temperature flow path 11 (first flow path) that guides the fluid W at the first temperature to the cylinder block EB (the first managed target) and the switching flow path 13 that guides the fluid W to the cylinder head EH (the second managed target) are separately provided. This allows independent temperature management of the cylinder block EB (the first managed target) and the cylinder head EH (the second managed target). Furthermore, the temperature of the fluid W flowing in the switching flow path 13 can be switched by flowing the fluid W at the first temperature or a fluid W at a third temperature, a mixture of the fluid W at the first temperature and the fluid W at the second temperature. This allows for more precise temperature management of the engine E.

[0109] (2) In the temperature management device 100 described in (1), the switching flow path 13 may extend in the horizontal direction, and the low-temperature flow path 12 (second flow path) may be connected to the switching flow path 13 from the lower side in the vertical direction perpendicular to the horizontal direction.

[0110] According to this configuration, the low-temperature flow path 12 (second flow path) is connected to the switching flow path 13 from the lower side in the vertical direction perpendicular to the horizontal direction. This makes it easier to control (inhibit) the flow of fluid W flowing in the low-temperature flow path 12 (second flow path) into the switching flow path 13. This facilitates temperature management of the fluid W guided to the cylinder head EH (the second managed object) via the switching flow path 13, enabling more detailed temperature management of the cylinder head EH (the second managed object).

[0111] (3) The temperature management device 100 described in (1) or (2) may further include a reduction portion 112b (blocking mechanism) capable of blocking the flow of the second temperature fluid W into the high temperature flow path 11 (first flow path).

[0112] According to this configuration, the fluid W flowing in the low-temperature flow path 12 (second flow path) can be shut off from flowing into the high-temperature flow path 11 (first flow path) by the narrowing portion 112b (shutoff mechanism). This facilitates temperature management (maintaining the fluid W at a high temperature) of the fluid W directed to the cylinder block EB (the first managed object), enabling more precise temperature management of the cylinder block EB (the first managed object).

[0113] (4) In the temperature management device 100 described in (3), the high-temperature flow path 11 (first flow path) may have a reduction portion 112b, which is provided at a position upstream of the connection portion P1 with the switching flow path 13 in the flow direction of the fluid W, and the flow path cross-sectional area is reduced compared to the upstream side, and the reduction portion 112b constitutes a shutoff mechanism, which can shut off the flow of the second temperature fluid W into the high-temperature flow path 11 (first flow path) by increasing the flow rate of the first temperature fluid W flowing into the switching flow path 13.

[0114] According to this configuration, the reduction portion 112b is configured to increase the flow velocity of the fluid W flowing into the switching flow path 13. This increased flow velocity of the fluid W is used to suppress the flow of the fluid W flowing in the low-temperature flow path 12 (second flow path) into the high-temperature flow path 11 (first flow path). As a result, the simple configuration of the reduction portion 112b facilitates temperature management of the fluid W directed to the cylinder block EB (the first managed object), enabling more precise temperature management of the cylinder block EB (the first managed object).

[0115] (5) In the temperature management device 100 described in (4), the high-temperature flow path 11 (first flow path) may have an expansion portion 112c having a flow path cross-sectional area larger than the reduction portion 112b at a position downstream of the reduction portion 112b and upstream of the switching flow path 13, and the expansion portion 112c is configured so that the fluid W flowing into the switching flow path 13 collides with the third wall surface H3 (wall surface) constituting the switching flow path 13 and swirls.

[0116] According to this structure, the expansion portion 112c is configured so that the fluid W flowing into the switching flow path 13 collides with the third wall surface H3 (wall surface) constituting the switching flow path 13 and swirls, so that the fluid W at the first temperature and the fluid W at the second temperature are well mixed, and the temperature distribution of the fluid W flowing in the switching flow path 13 can be made uniform.

[0117] (6) In any one of (1) to (5), the temperature management device 100 may further include: a temperature sensor 4 (sensor) for obtaining the temperature of the fluid W; and a guide flow path 14 for guiding the fluid W to the temperature sensor 4 (sensor), the guide flow path 14 including: a first guide flow path 141 connected to the switching flow path 13; a second guide flow path 142 connected to the low-temperature flow path 12 (second flow path); and a merging guide flow path 143 for merging the first guide flow path 141 and the second guide flow path 142, and provided with the temperature sensor 4 (sensor), and the length of the first guide flow path 141 is configured to be the same as the length of the second guide flow path 142.

[0118] This configuration allows the flow rate of the fluid W flowing through the first guide flow path 141 to be equalized to the flow rate of the fluid W flowing through the second guide flow path 142. Consequently, the temperature sensor 4 (sensor) disposed in the merging guide flow path 143 can obtain the average value of the temperature of the fluid W flowing through the first guide flow path 141 and the temperature of the fluid W flowing through the second guide flow path 142. As a result, the temperature of the fluid W flowing through the first guide flow path 141 and the temperature of the fluid W flowing through the second guide flow path 142 can be more accurately obtained. Consequently, the temperature of the engine E can be more precisely managed.

[0119] (7) In the temperature management device 100 described in (6), the inlet of the fluid W of the first guide flow path 141, i.e., the first guide flow inlet 14H1, and the inlet of the fluid W of the second guide flow path 142, i.e., the second guide flow inlet 14H2, may have a smaller flow path cross-sectional area than the upstream side of the first guide flow inlet 14H1 and the second guide flow inlet 14H2.

[0120] According to this configuration, the first guide inlet 14H1 and the second guide inlet 14H2 are configured so that their flow path cross-sectional areas are reduced, that is, so that the pressure loss of the fluid W is increased. Therefore, the pressure difference between the fluid W flowing in the first guide flow path 141 and the fluid W flowing in the second guide flow path 142 is negligibly small, and the flow rate of the first guide flow path 141 and the flow rate of the second guide flow path 142 flowing into the merging guide flow path 143 can be made equal.

[0121] (8) In the temperature management device 100 described in (6) or (7), the merging guide flow path 143 may include a protrusion 143 t that protrudes toward the temperature sensor 4 (sensor) disposed in the merging guide flow path 143 .

[0122] According to this structure, fluid W (fresh fluid W) that has not yet undergone heat exchange with temperature sensor 4 (sensor) is guided by protrusion 143t into contact with temperature sensor 4 (sensor). Simultaneously, fluid W, which has been heated through heat exchange with temperature sensor 4 (sensor), is squeezed away from temperature sensor 4 (sensor). This increases the amount of heat transfer between temperature sensor 4 (sensor) and fluid W. As a result, even when the flow rate of fluid W flowing in confluent guide channel 143 is at the lower limit of the flow rate that temperature sensor 4 (sensor) can measure, the temperature of fluid W can still be accurately measured.

[0123] (9) In the temperature management device 100 described in any one of (6) to (8), the guide flow path 14 may be composed of a groove S and a cover C, the groove S being formed in a first wall G1 constituting the high-temperature flow path 11 (first flow path), the low-temperature flow path 12 (second flow path) and the switching flow path 13, and a second wall G2 protruding from the first wall G1, the cover C covering the groove S, and the temperature sensor 4 (sensor) being arranged between the groove S and the cover C.

[0124] According to this structure, since the guide flow path 14 is composed of the groove S formed in the wall and the cover C covering the groove S, the guide flow path 14 and the temperature sensor 4 (sensor) can be simply configured. In addition, since the temperature sensor 4 (sensor) only needs to be arranged between the groove S and the cover C, the temperature sensor 4 (sensor) can be easily assembled.

[0125] (10) The temperature management device 100 described in (7) may also include: a control unit 20 that controls the operation of the first pump 31 and the second pump 32, and the control unit 20 controls the operation of the first pump 31 and the second pump 32 so that the interface F between the fluid W at the first temperature and the fluid W at the second temperature is formed between the first guide inlet 14H1 and the second guide inlet 14H2.

[0126] According to this configuration, since the interface F between the fluid W at the first temperature and the fluid W at the second temperature is formed between the first guide inlet 14H1 and the second guide inlet 14H2 , the temperature of the fluid W can be more accurately acquired. As a result, the temperature of the engine E can be managed more precisely.

[0127] Industrial applicability

[0128] The present disclosure can be utilized in a temperature management device.

[0129] Description of Reference Signs

[0130] 3: Pump, 4: Temperature sensor (sensor), 11: High-temperature flow path (first flow path), 12: Low-temperature flow path (second flow path), 13: Switching flow path, 14: Guide flow path, 14H1: First guide flow inlet, 14H2: Second guide flow inlet, 20: Control unit, 31: First pump, 32: Second pump, 100: Temperature management device, 112b: Reduction portion, 112c: Expansion portion, 141: First guide flow path, 142: Second guide flow path, 143: Merging guide flow path, 143t: Boss, C: Cover, E: Engine (temperature management target), EB: Cylinder block (first management target), EH: Cylinder head (second management target), F: Interface, G1: First wall, G2: Second wall, H3: Third wall (wall surface), P1: Connecting portion, S: Groove, W: Cooling water (fluid).

Claims

1. A temperature management device for managing the temperature of a temperature management object having a first management object and a second management object by circulating a fluid, wherein: have: a first pump for delivering a fluid at a first temperature that is heated by the temperature-managed object; a second pump for delivering fluid at a second temperature lower than the first temperature; a first flow path for guiding the fluid at the first temperature delivered by the first pump toward the first managed object; a second flow path through which the fluid at the second temperature delivered by the second pump flows; and Switching the flow path to connect the first flow path and the second flow path, switching the temperature of the fluid guided to the second management object, The fluid at the first temperature or the fluid at a third temperature obtained by mixing the fluid at the first temperature and the fluid at the second temperature flows through the switching flow path.

2. The temperature management device according to claim 1, wherein The switching flow path extends in the horizontal direction, The second flow path is connected to the switching flow path from a lower side in a vertical direction perpendicular to the horizontal direction.

3. The temperature management device according to claim 1 or 2, wherein: Also features: The shutoff mechanism can shut off the flow of the fluid at the second temperature into the first flow path.

4. The temperature management device according to claim 3, wherein: The first flow path has a reduction portion, the reduction portion is provided upstream of a connection portion with the switching flow path in the flow direction of the fluid, and the flow path cross-sectional area is reduced compared to the upstream side. The reduction portion constitutes the shutoff mechanism capable of shutting off the inflow of the fluid at the second temperature into the first flow path by increasing the flow rate of the fluid at the first temperature flowing into the switching flow path.

5. The temperature management device according to claim 4, wherein: The first flow path includes an expansion portion having a larger flow path cross-sectional area than the contraction portion, located downstream of the contraction portion and upstream of the switching flow path. The expansion portion is configured so that the fluid flowing into the switching flow path collides with a wall surface constituting the switching flow path and swirls.

6. The temperature management device according to claim 1 or 2, wherein: Also features: a sensor for acquiring the temperature of the fluid; as well as A flow path is provided to guide the fluid to the sensor. The guiding flow path has: a first guide flow path connected to the switching flow path; a second guide flow path connected to the second flow path; as well as The merging guide flow path merges the first guide flow path and the second guide flow path, and is provided with the sensor. The length of the first guide flow path is configured to be the same as the length of the second guide flow path.

7. The temperature management device according to claim 6, wherein: The first guide inlet as the fluid inlet of the first guide flow path and the second guide inlet as the fluid inlet of the second guide flow path have smaller flow path cross-sectional areas than those on the upstream side of the first guide inlet and the second guide inlet.

8. The temperature management device according to claim 6, wherein: The merging guide flow path includes a protrusion that protrudes toward the sensor disposed in the merging guide flow path.

9. The temperature management device according to claim 6, wherein: The guide flow path is composed of a groove and a cover, the groove is formed in a first wall constituting the first flow path, the second flow path, and the switching flow path, and a second wall protruding from the first wall, and the cover covers the groove. The sensor is disposed between the groove and the cover.

10. The temperature management device according to claim 7, wherein: Also features: a control unit for controlling the operation of the first pump and the second pump; The control unit controls operations of the first pump and the second pump so that an interface between the fluid at the first temperature and the fluid at the second temperature is formed between the first guide inlet and the second guide inlet.

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