Valve device

Abstract

Provided is a valve device capable of reducing pressure loss. A valve device (1) according to the present invention comprises: a housing (11) in which an inlet (11a) and an outlet (11b) for cooling liquid are formed; a cylindrical valve body (12) which is housed in the housing (11) and which switches the communication state between the inlet (11a) and the outlet (11b) by rotating in the housing (11); and a frame (17) which is attached to the inlet (11a) and serves as a flow path for supplying the coolant to the internal space of the valve body (12). The frame (17) has at least one rectifying section that guides the cooling liquid in a desired direction by bending the inflow direction of the cooling liquid with respect to the rotation axis of the valve body (12).

Description

Technical Field

[0001] The present invention relates to a valve device for releasing inflowing coolant into a desired flow path in a cooling circuit of a vehicle. Background Art

[0002] Conventionally, a vehicle cooling circuit (a circulation system for vehicle coolant) uses a valve device for distributing the inflowing coolant to various devices such as a heating heat exchanger, an oil cooler, and a radiator.

[0003] Patent Document 1 below discloses a flow control valve as an example of a valve device used in a cooling circuit of an automobile. The flow control valve distributes coolant supplied from a cylinder head side to a radiator or the like under pressure from a water pump and controls the flow rate.

[0004] Specifically, the flow control valve described in patent document 1 includes a valve body housing portion, a rotating shaft supported in the valve body housing portion so as to be axially rotatable, a valve body housed in the valve body housing portion and mounted on the rotating shaft so as to be rotatable as a whole, and an electric motor for rotationally driving the valve body (rotating shaft) as main components.

[0005] Three communication ports are protruding from the outer periphery of the valve body housing, connecting to piping such as a radiator and distributing coolant. The valve body, which rotates integrally with the shaft within the valve body housing, has an opening at one axial end, serving as an inlet for coolant flowing in from the cylinder head into the internal space, while the other end is sealed by an end wall. Furthermore, multiple valve holes, individually formed corresponding to the communication ports, are provided on the outer periphery of the valve body so that they appropriately overlap with the communication ports as the shaft rotates.

[0006] Specifically, each valve hole provided in the valve body is formed so that the communication state between the corresponding communication port and the internal space of the valve body is switched as the shaft rotates. As a result, the coolant introduced into the internal space of the valve body through the inlet is appropriately distributed according to the communication state between the communication port and the internal space of the valve body.

[0007] Prior art literature

[0008] Patent Literature

[0009] Patent Document 1: Japanese Patent Application Laid-Open No. 2015-59615 Summary of the Invention

[0010] Problems to be solved by the invention

[0011] As described above, in the conventional valve device (the flow control valve described in Patent Document 1), the coolant taken into the internal space of the valve body is distributed according to the communication state between the communication port and the internal space of the valve body.

[0012] However, coolant flowing into the valve assembly from the cylinder head flows linearly from one end of the valve body into the internal space. This inflowing coolant directly collides with the end wall at the other end of the valve body, creating turbulent flow within the internal space of the valve body while being distributed toward the various communication ports (such as those on the radiator piping side) formed on the outer periphery of the valve body housing. Specifically, conventional valve assemblies suffer from the problem of pressure loss caused by this turbulent flow within the internal space of the valve body, resulting in a reduction in the flow rate of coolant downstream.

[0013] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a valve device capable of reducing pressure loss.

[0014] Means of solving the problem

[0015] The valve device involved in the present invention includes: a housing, which is formed with an inlet and an outlet for a coolant; a cylindrical valve body, which is accommodated in the housing and switches the communication state between the inlet and the outlet by rotating about an axis in the housing; and a frame, which is mounted on the inlet, wherein the coolant flows into the internal space of the valve body through the frame, and the frame has one or more rectifying parts, which guide the flow direction of the coolant flowing in from the inlet toward a direction bent relative to the axis.

[0016] According to the above structure, the rectifying portion forms a lateral flow of the coolant in the inner space of the valve body. Thus, when the coolant flowing into the inner space from one end of the valve body flows out laterally from the valve hole of the valve body, turbulence in the inner space of the valve body can be suppressed.

[0017] Alternatively, the frame may include an annular frame portion mounted on the inlet and a cylindrical portion formed at the center of the frame portion, wherein one end of the rectifying portion is connected to the frame portion and the other end is connected to the cylindrical portion. Thus, when the rectifying portion is provided, it connects the frame portion and the cylindrical portion, thereby reinforcing the frame. In other words, the rectifying portion can have both rectifying and reinforcing functions.

[0018] In addition, the valve device involved in the present invention includes: a shell, which is formed with an inlet and an outlet for the coolant; and a cylindrical valve body, which is accommodated in the shell and switches the communication state between the inlet and the outlet by rotating around the axis in the shell. An inlet for taking the coolant into the internal space of the valve body is formed at one end along the axis of the valve body, and one or more rectifying parts are provided at the inlet, which guide the flow direction of the coolant flowing in from the inlet toward a direction bent relative to the axis.

[0019] According to the above structure, the rectifying portion forms a lateral flow of the coolant in the inner space of the valve body. Thus, when the coolant flowing into the inner space from one end of the valve body flows out laterally from the valve hole of the valve body, turbulence in the inner space of the valve body can be suppressed.

[0020] In addition, the rectifying portion may be arranged to be inclined relative to the axis. In this way, a lateral flow of the cooling liquid can be formed in the internal space of the valve body through the rectifying portion.

[0021] Alternatively, a plurality of flow straightening sections may be provided, all of which are inclined in the same direction. This allows the flow straightening sections to form a vortex-shaped water flow within the interior space of the valve body, thereby reliably forming a lateral flow of the coolant and more reliably reducing pressure loss.

[0022] Furthermore, the cooling liquid can also be formed into a vortex-shaped flow in the inner space of the valve body by the rectifying portion and flow toward the outflow port. In this way, the lateral flow of the cooling liquid can be reliably formed and the pressure loss can be more reliably reduced.

[0023] Effects of the Invention

[0024] According to the valve device according to the present invention, pressure loss can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a cross-sectional view of a valve device according to a first embodiment of the present invention.

[0026] Figure 2 Shown Figure 1 Frame of the valve device, (a) shows a front view of the appearance of the frame, (b) is a cross-sectional view of the frame shown in (a) along the line A'-A.

[0027] Figure 3 To schematically show Figure 1 1. A diagram illustrating the flow of coolant within a valve device.

[0028] Figure 4 It is a cross-sectional view of a valve device according to a second embodiment of the present invention.

[0029] Figure 5 To schematically show Figure 4 1. A diagram illustrating the flow of coolant within a valve device.

[0030] Figure 6 A perspective view showing a valve body of a valve device according to a third embodiment of the present invention. DETAILED DESCRIPTION

[0031] Below, embodiments of the valve device according to the present invention are described in detail based on the accompanying drawings. The present invention is not limited to these embodiments. In the specification and drawings of this application, elements that can be described similarly may be denoted by the same reference numerals to avoid redundant description.

[0032] <First embodiment>

[0033] Figure 1 1 is a cross-sectional view showing a valve device according to a first embodiment of the present invention. Figure 1 The upper side and the lower side in are simply referred to as “upper” and “lower”.

[0034] The valve device 1 of this embodiment is used in an automotive cooling circuit (coolant circulation system). This circuit comprises a cooling path, in which coolant flowing out of the engine (cylinder head side) returns to the engine (cylinder block side) via a radiator; and a bypass path, in which coolant flowing out of the engine returns to the engine without passing through (bypassing) the radiator. Furthermore, the valve device 1 controls the opening and closing of a valve hole formed in the valve body, thereby releasing coolant flowing in from the engine into the cooling path and the bypass path, respectively, and controlling the flow rate.

[0035] <Basic structure of the valve unit>

[0036] The valve device 1 of this embodiment includes a housing 11 having a coolant inlet 11a and multiple outlets 11b (11b1, 11b2); a valve body 12 housed within the interior of the housing 11 and rotatable about an axis (rotational axis); adapters 13 (131, 132) connected to the outlets 11b; and sealing members 14 (141, 142) for preventing leakage of coolant released toward the adapter 13 through valve holes 12f (12f1, 12f2) formed in the valve body 12. The valve device 1 appropriately releases coolant into the cooling path and bypass path by controlling the rotation of the valve body 12 based on instructions from a vehicle-mounted control unit (not shown).

[0037] The structure of the valve device 1 of this embodiment will be described in more detail below. In this embodiment, the direction along the axis serving as the rotation center of the valve body 12 is referred to as the "axial direction," the direction orthogonal to the axis is referred to as the "radial direction," and the direction around the axis is referred to as the "circumferential direction."

[0038] The housing 11 comprises a main body 11c, which defines an interior space for accommodating the valve body 12; and a bottomed cover 11d, which, between it and the upper surface of the main body 11c, forms a space for accommodating a speed reducer 15. The open end (peripheral edge) of the cover 11d is attached to the upper surface of the main body 11c to seal the interior space of the cover 11d. The speed reducer 15, housed in the space of the cover 11d, comprises multiple gears and functions to reduce the speed of rotation of a motor (not shown) operated by a control device and transmit the speed to the valve body 12.

[0039] Furthermore, in the housing 11, a cylindrical insertion portion 11e is provided above the main body portion 11c. When inserted, this insertion portion 11e rotatably supports the shaft 12a, which serves as the rotation axis of the valve body 12. A bearing 11f is provided on the inner periphery of the insertion portion 11e to rotatably support the upper portion of the shaft 12a.

[0040] Furthermore, in the housing 11, a substantially cylindrical outflow port 11b (11b1, 11b2) is provided on the outer periphery of the main body 11c to project radially outward. Figure 1 The outlets 11b1 and 11b2 are provided at different positions in the axial direction and the circumferential direction. Furthermore, cylindrical adapters 13 (131, 132) communicating with the cooling passage and the bypass passage are respectively inserted and fixed to the outlets 11b.

[0041] In addition, Figure 1 In the (sectional view), the outlets 11b are provided at two locations of the main body 11c, but the present invention is not limited thereto. The outlets 11b may be further formed at two locations according to the number and direction of the flow paths for releasing the coolant. Figure 1 Locations other than .

[0042] Furthermore, an inlet 11a is formed at the lower end of the housing 11. This inlet 11a communicates with the cylinder head and is used to draw coolant into the valve body 12. Furthermore, a frame 17 is attached to this inlet 11a, which supports the lower end of the shaft 12a via a cylindrical portion 17a formed in the center. Specifically, this frame 17 comprises an annular frame portion 17b attached to the housing 11 along the periphery of the inlet 11a; the cylindrical portion 17a formed in the center of the frame portion 17b; and three bridge portions 17c for frame strength reinforcement, connecting three locations (equally spaced) of the frame portion 17b to the cylindrical portion 17a. Coolant can flow into the housing 11 through this frame 17. Details of the frame 17 of this embodiment will be described later.

[0043] The valve body 12 comprises a shaft 12a, which functions as a rotating shaft, and a valve body 12b, which has an outer wall capable of switching between external communication states and is rotatably coupled to the shaft 12a. A gear, a component of the speed reducer 15, is integrally mounted on the shaft 12a. Consequently, when the gear rotates due to the motor's drive, the valve body 12 (shaft 12a, valve body 12b) rotates in conjunction with it.

[0044] Furthermore, in the valve body 12, a joint portion 12c is provided at the center of the valve main body 12b, which engages with the outer periphery of the shaft 12a while the shaft 12a penetrates the valve main body 12b. Furthermore, two valve portions are connected to the valve main body 12b, one above the other. These two valve portions are cylindrical, with openings at the top and bottom, and spherical outer walls. In this embodiment, the lower valve portion is referred to as the first valve portion 12b1, and the upper valve portion is referred to as the second valve portion 12b2.

[0045] The space between the shaft 12a and the insertion tube 11e of the housing 11 is sealed by a seal ring 12d. This prevents coolant in the main body 11c from flowing from the insertion tube 11e into the cover 11d. Furthermore, the lower opening of the first valve portion 12b1 functions as an inlet 12e, which draws coolant flowing in from the cylinder head via the frame 17 (inlet 11a) into the interior space of the valve body 12.

[0046] In addition, valve holes 12f1 and valve holes 12f2 are provided in the first valve portion 12b1 and the second valve portion 12b2, respectively. The valve hole 12f radially penetrates the thick walls of the first valve portion 12b1 and the second valve portion 12b2. If the valve body 12 rotates, the valve hole 12f overlaps with the opening of the sealing component 14, and the coolant flows out from the overlapping portion. In this way, each valve hole 12f is opened and closed by rotating in conjunction with the rotation of the valve body 12b and the shaft 12a, and the connection state between the inlet 11a and the outlet 11b (11b1, 11b2) is switched by this opening and closing action. That is, each valve hole 12f provided in the valve body 12 is formed to switch the connection state between the corresponding outlet 11b (11b1, 11b2) and the internal space of the valve body 12 as it rotates. Thus, the coolant taken into the internal space of the valve body 12 (first valve portion 12b1 and second valve portion 12b2) through the inlet 12e is released to the cooling path and the bypass path according to the opening and closing operation of each valve hole 12f, and its flow rate is controlled.

[0047] In addition, in this embodiment, as an example, the valve device 1 is described to release the coolant flowing in from the inlet 11a (via the frame 17) to the cooling path and the bypass path, but the connection structure of the flow path connected to the valve device 1 is not limited to this and can be appropriately changed according to the specifications of the automobile's cooling circuit (coolant circulation system).

[0048] In addition, in this embodiment, Figure 1 As shown, the sealing component 14 (141, 142) is pressed against the outer wall of the valve body 12 by the force of the coil spring, but it is not limited to this. As long as it can prevent the leakage of the coolant released to the adapter 13 side through the valve hole 12f of the valve body 12, it can also be achieved by other structures.

[0049] <Frame>

[0050] Next, the frame 17 will be described in detail. Figure 2 Shown Figure 1 Frame 17 of valve device 1, (a) shows a front view of the appearance of frame 17, (b) is a cross-sectional view of the frame 17 shown in (a) along line A'-A.

[0051] exist Figure 2 As described above, the frame 17 has: an annular frame portion 17b, which is mounted on the inner wall of the inlet 11a formed at the lower end of the valve device 1 (main body portion 11c); a cylindrical portion 17a, which is formed at the center of the frame portion 17b and supports the lower end of the shaft 12a serving as the rotation axis of the valve body 12; and three bridge portions 17c (17c1, 17c2, 17c3) for reinforcing the strength of the frame, which respectively connect three parts (equally spaced) of the frame portion 17b and the cylindrical portion 17a. Thus, the frame 17 can obtain the desired strength. The coolant can flow into the housing 11 through the frame 17. In addition, the position where one end of the bridge portion 17c is joined to the frame portion 17b is not limited to Figure 2 The three locations shown (equally spaced) may be two locations with equal intervals depending on the required strength, or four or more locations with equal intervals. Furthermore, as long as the desired strength can be obtained, the intervals may not be equal.

[0052] Furthermore, the frame 17 includes multiple flow straightening sections 17d (17d1, 17d2, 17d3). These straightening sections 17d (17d1, 17d2, 17d3) are positioned within the coolant flow path formed between the bridge sections 17c and guide the coolant flowing through this flow path in a desired direction. Specifically, one end of each flow straightening section 17d is connected to the frame section 17b, and the other end is connected to the cylindrical section 17a. Each flow straightening section 17d is shaped like a long, roughly flat plate and is tilted at a predetermined angle θ relative to the rotation axis of the valve body 12. This tilt guides the flow of coolant flowing into the interior of the valve body 12 through the frame 17 in the direction of the tilt of the flow straightening section 17d. In other words, the flow straightening section 17d functions as a guide, directing the water flow in a desired direction. In this embodiment, the tilt angle θ of the flow straightening section 17d is approximately 45 degrees, but this tilt angle θ can be set arbitrarily. Furthermore, the shape of the rectifying portion 17d is not limited to a flat plate. For example, the rectifying portion 17d may be a triangular prism having an inclined surface inclined at a predetermined angle θ relative to the rotation axis of the valve body 12. Furthermore, the rectifying portion 17d may have a through hole or slit that is curved or inclined relative to the rotation axis of the valve body 12.

[0053] In this embodiment, the coolant flowing in through the frame 17 is bent relative to the rotation axis of the valve body 12 by the rectifying portion 17d, forming a vortex-shaped water flow rotating around the rotation axis of the valve body 12 in the internal space of the valve body 12 and flowing toward each outflow port 11b1, 11b2.

[0054] This prevents turbulence from forming within the interior of the valve body 12, allowing the coolant to flow smoothly toward each outlet. This reduces pressure loss and prevents insufficient coolant flow on the downstream side. In other words, the valve device 1 can effectively release coolant to the cooling path and the bypass path.

[0055] Furthermore, by providing both the bridge portion 17c and the flow-straightening portion 17d, it is possible to further improve the frame strength of the frame 17. Alternatively, if the strength of the frame 17 can be ensured only by the flow-straightening portion 17d, the bridge portion 17c may be omitted.

[0056] Figure 3 To schematically show Figure 1 The flow of the coolant in the valve device 1 is explained. In this embodiment, the coolant flowing out of the cylinder head is Figure 3 The coolant flows into the inlet 11a in the direction of inflow. Then, it is guided by the rectifying portion 17d provided at the inlet 11a and flows in a curved manner relative to the rotation axis of the valve body 12. As a result, a horizontal flow of the coolant is formed in the internal space of the valve body 12. The valve hole 12f penetrates the valve body 12 in the radial direction (lateral direction), so that the coolant flows smoothly from the inlet 11a to the outlets 11b1 and 11b2, thereby suppressing the formation of turbulence in the internal space of the valve body 12. The coolant that has passed through the outlets 11b1 and 11b2 is supplied to the cooling path or the bypass path (refer to Figure 3 arrows A, B).

[0057] Furthermore, in this embodiment, the inclination angle θ of each rectifying portion 17d is the same. Thus, the inclination directions of the plurality of rectifying portions 17d are the same, so that a vortex-shaped water flow can be formed in the internal space of the valve body 12. Therefore, it is easy to form a horizontal flow of the coolant in the internal space of the valve body 12, and the pressure loss can be reliably reduced. In addition, the inclination angle θ can be changed for each rectifying portion 17d, and the inclination direction of each rectifying portion 17d can also be different. In addition, the number of rectifying portions 17d is not limited to Figure 2 Of the three shown, only at least one rectifying portion 17d is required.

[0058] Furthermore, in this embodiment, one end of each rectifying portion 17d is connected to the frame portion 17b, and the other end is connected to the cylindrical portion 17a. This arrangement of rectifying portions 17d radially on the frame 17 facilitates the formation of a transverse flow of the coolant within the interior of the valve body 12. Alternatively, both ends of the rectifying portion 17d may be connected to the frame portion. In this way, the shape, inclination, number, and arrangement of the rectifying portions 17d can be modified as appropriate to direct the coolant in a desired direction.

[0059] <Second embodiment>

[0060] In addition, the frame 17 can also be applied to a valve device with a fail-safe function in the same manner as the valve device 1. Figure 1 Elements similar to those described in the valve device 1 are denoted by the same reference numerals, and redundant description is omitted.

[0061] Figure 4 A cross-sectional view of a valve device according to a second embodiment is shown. Figure 4 In the valve device 1a shown, a substantially cylindrical outflow port 11b3 (11b) is provided on the outer periphery of the main body 11c so as to project radially outward. A cylindrical adapter 133 (13) communicating with the cooling path is fitted and fixed to the outflow port 11b3.

[0062] exist Figure 4 The illustrated valve device 1a is provided with a fail-safe component 30. This fail-safe component 30 connects the inlet 11a and outlet 11b3 when the valve body 12 cannot be driven due to a malfunction or when the coolant reaches a predetermined temperature. The fail-safe component 30 ensures a coolant supply path even when the valve body 12 cannot operate normally due to a malfunction or other reasons.

[0063] The fail-safe component 30 includes a thermal element 31 , a valve plate member 32 , and a coil spring 33 , and operates on the same principle as a wax pellet type thermostat or the like.

[0064] The main body 11c of the housing 11 further includes an element housing 34 for housing the thermal element 31 of the fail-safe component 30. Furthermore, a flow path 35 connected to the outlet 11b3 is formed above the element housing 34, which is closed by the valve plate 32 of the fail-safe component 30.

[0065] The element housing portion 34 has a large diameter housing space 34a below the valve plate member 32 and a gradually decreasing diameter portion 34b formed at the upper end of the element housing portion 34. The large diameter housing space 34a communicates with the inlet 11a via a valve body communication portion 34c.

[0066] In the fail-safe component 30, the valve plate member 32 is arranged to be pressed against the reduced diameter portion 34b by being biased toward the reduced diameter portion 34b by the coil spring 33. This prevents the coolant from passing from the large diameter accommodation space 34a to the flow path 35.

[0067] Thermistor 31 is filled with wax. When the temperature of the coolant within element housing 34 exceeds a predetermined temperature, the wax expands, causing rod 31a, located along the axis of thermosensitive element 31, to extend. This extension of rod 31a causes valve plate member 32, integrally mounted to rod 31a, to move downward against the bias of coil spring 33, allowing coolant within large-diameter housing space 34a to flow freely toward flow path 35. The predetermined temperature is set to a temperature at which inlet 11a and outlet 11b3 are preferably connected via fail-safe member 30.

[0068] In addition, in this embodiment, the coolant flowing through the frame 17 is Figure 2 The plurality of rectifying portions 17 d ( 17 d 1 , 17 d 2 , 17 d 3 ) shown form a vortex-shaped water flow (swirl flow), a portion of which is guided to the element housing portion 34 side (large-diameter housing space 34 a ).

[0069] Figure 5 To schematically show Figure 4 In this embodiment, the coolant flowing out of the cylinder head flows from the valve device 1a. Figure 5 The coolant enters the inlet 11a in the opposite direction. It is then guided by the rectifying portion 17d provided at the inlet 11a, flowing in a curved manner relative to the rotation axis of the valve body 12. This creates a transverse flow of coolant within the interior of the valve body 12. The element housing 34 is located on the lateral side of the valve body 12, allowing the coolant to flow smoothly from the inlet 11a to the element housing 34.

[0070] That is, according to Figure 4 as well as Figure 5 In the illustrated valve device 1a, coolant flowing from the inlet 11a into the main body 11c of the housing 11 flows smoothly through the rectifying portion toward the element housing 34, thereby improving the temperature sensing performance of the fail-safe component 30. Except for components related to the fail-safe component 30, components other than those related to the fail-safe component 30 are denoted by the same reference numerals, and redundant description thereof will be omitted.

[0071] <Third embodiment>

[0072] In addition, if Figure 6 As shown, the rectifying portion 17d can also be provided at the inlet 12e of the valve body 12. Figure 1 Components similar to those described in the valve device 1 are denoted by the same reference numerals, and redundant description is omitted.

[0073] The valve device of this embodiment (not shown) includes a housing 11 formed with a coolant inlet 11a and an outlet 11b (11b1, 11b2); and a cylindrical valve body 12 housed within the housing 11. The valve body 12 is rotated about an axis (rotational axis) within the housing 11 to switch the communication between the inlet 11a and the outlet 11b. An inlet 12e for introducing coolant into the interior of the valve body 12 is formed at one end along the rotational axis. This inlet 12e is provided with a flow straightening portion 17d (17d1, 17d2, 17d3) that directs the flow of coolant flowing from the inlet 11a in a direction curved relative to the rotational axis.

[0074] In this embodiment, the flow straightening portion 17d is arranged to be inclined relative to the rotation axis. Furthermore, multiple flow straightening portions 17d are provided, and all of the plurality of flow straightening portions 17d are inclined in the same direction. The resulting effects are as described above, but the shape, inclination, number, and arrangement of the flow straightening portions 17d can be modified as appropriate to direct the coolant in a desired direction. Furthermore, the valve body 12 having the flow straightening portion 17d can also be used in a valve device 1a equipped with a fail-safe component 30, as in the second embodiment.

[0075] Description of Reference Numerals

[0076] 1.1a valve device

[0077] 11 Housing

[0078] 11a Inlet

[0079] Outlets 11b, 11b1, 11b2, and 11b3

[0080] 11c Main body

[0081] 11d Cover

[0082] 11e Insert the barrel

[0083] 11f bearing

[0084] 12 Valve body

[0085] 12a shaft

[0086] 12b Valve body

[0087] 12b1 first valve part

[0088] 12b2 Second valve part

[0089] 12c Joint

[0090] 12d sealing ring

[0091] 12e import port

[0092] 12f, 12f1, 12f2 valve holes

[0093] 13, 131, 132, 133 adapters

[0094] 14, 141, 142 sealing components

[0095] 15 reducer

[0096] 17 Framework

[0097] 17a Cylindrical part

[0098] 17b Frame

[0099] 17c Bridge

[0100] 17d, 17d1, 17d2, 17d3 rectifier

[0101] 30 Fail-safe components

[0102] 31 Thermal element

[0103] 31a Rod

[0104] 32 Valve plate components

[0105] 33 Coil spring

[0106] 34 Component storage area

[0107] 34a Large diameter storage space

[0108] 34b Reduced diameter portion

[0109] 34c Valve body connecting part

[0110] 35 flow path

Claims

1. A valve device, characterized in that: include: The housing is formed with an inlet and an outlet for the coolant; A cylindrical valve body is housed in the housing and rotates about an axis in the housing to switch the communication state between the inlet and the outlet; and A frame, mounted on the inlet, wherein The coolant flows into the internal space of the valve body through the frame, The frame has one or more flow straightening portions that guide the flow direction of the coolant flowing in from the inlet toward a direction bent with respect to the axis.

2. The valve device according to claim 1, characterized in that The framework includes: an annular frame portion mounted on the inlet; and The cylindrical portion is formed in the center of the frame, wherein One end of the rectifying portion is connected to the frame portion, and the other end is connected to the cylindrical portion.

3. A valve device, characterized in that: include: The housing is formed with an inlet and an outlet for the coolant; as well as The cylindrical valve body is housed in the housing and rotates around the axis in the housing to switch the communication state between the inlet and the outlet. An inlet for taking coolant into the internal space of the valve body is formed at one end along the axis of the valve body. The inlet is provided with one or more flow straightening portions, which guide the flow direction of the coolant flowing in from the inlet in a direction bent with respect to the axis.

4. The valve device according to any one of claims 1 to 3, characterized in that The rectifying portion is provided so as to be inclined with respect to the axis.

5. The valve device according to claim 4, characterized in that A plurality of rectifying parts are provided, and all of the rectifying parts are inclined in the same direction.

6. The valve device according to claim 1 or 3, characterized in that The coolant passes through the rectifying portion, forming a vortex-shaped flow in the internal space of the valve body and flows toward the outflow port.

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