Three-way valve, thermal management system of vehicle and vehicle

Abstract

The three-way valve comprises a valve shell, a valve element and a valve controller, a valve cavity and a flow channel set are formed in the valve shell, at least three flow channels for fluid to pass through are formed in the flow channel set, the flow channels can be used for the fluid to enter or flow out of the valve cavity, and the valve element is arranged in the valve cavity and can axially rotate relative to the valve shell so as to communicate or shield the flow channels. The valve controller is connected with the valve element and can control the valve element to rotate so that various different circulation states can be formed between the valve element and the flow channel set. According to the three-way valve, by rotating the valve element, the relative position of the valve element and the valve shell is changed, so that different circulation states are formed between the flow channels of the three-way valve, and the requirements of different circulation modes are met.

Description

Technical Field

[0001] The present application relates to the technical field of water circulation heat exchange for vehicles, and in particular to a three-way valve, a thermal management system for a vehicle, and a vehicle. Background Art

[0002] The water circuit is the heat source medium and heat source for vehicle thermal management. The heat generated by the combustion of the hybrid vehicle engine, the heat generated by the three-electric system and the need for cooling, as well as the heating needs of the passenger compartment need to be balanced through the water circuit, thereby effectively utilizing heat, reducing the energy consumption of the entire vehicle, and reducing environmental pollution.

[0003] At present, the three-way valve used in the vehicle's water circulation system generally adopts a fixed interface mode to reduce flow resistance. The water inlet or outlet mode of the interface cannot be changed, the fluid flow cannot be distributed between two interfaces, and the three interfaces cannot be cut off at the same time, which may cause energy loss in some cases.

[0004] It can be seen that the existing technology still needs to be improved and enhanced. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the present application is to provide a three-way valve, a thermal management system of a vehicle and a vehicle, aiming to achieve multiple flow modes through the three-way valve.

[0006] In order to achieve the above objectives, this application adopts the following technical solutions:

[0007] On one hand, the present application discloses a three-way valve, including a valve housing, a valve core and a valve controller; the valve housing is formed with a valve cavity and a flow channel group, the flow channel group is provided with at least three flow channels for fluid to pass through, and the flow channels can be used for fluid to enter or flow out of the valve cavity; the valve core is arranged in the valve cavity, and can rotate axially relative to the valve housing to connect or block the flow channel; the valve controller can control the rotation of the valve core to form a variety of different flow states between the valve core and the flow channel group. With the rotation of the valve core, different flow states can be formed between the valve housing and the valve core, reducing the use of the valve body and reducing the product cost, and the three-way valve can also realize the cutting off of each flow channel. When it is applied to the vehicle thermal management system, it can reduce energy consumption and improve the utilization rate of heat.

[0008] In some embodiments of the present application, a first opening is provided at one end of the flow channel facing the valve cavity, and the valve core can intercept the first opening, so that when the valve core rotates, the valve core can form different interception areas with the first opening. By rotating the valve core, the valve core can form different blocking areas for the first opening, thereby changing the flow rate of the flow channel, which is simple to operate and can be applied to different circulation modes.

[0009] In some embodiments of the present application, a plurality of baffles are disposed on the valve core, and the baffles are disposed corresponding to the first opening, and can intercept the first opening, so that when the valve core rotates, the baffles can form different interception areas with the first opening. The baffles are disposed corresponding to the first opening, and when the valve core rotates, the relative positions of the baffles and the first opening will change, thereby changing the shielding area of ​​the baffles on the first opening, so that different interception areas are formed between the baffles and the first opening, and adapting to a variety of different flow modes.

[0010] In some embodiments of the present application, the valve core can be rotated to fully or partially connect at least three of the flow channels, so that the fluid can enter the valve cavity from one of the flow channels and be discharged from the valve cavity from at least two of the flow channels, and rotating the valve core can adjust the flow rate of the fluid entering the flow channels, so that the flow rate of the fluid flowing out of different flow channels can be adjusted according to usage, with high flexibility.

[0011] In some embodiments of the present application, the valve core can be rotated to fully or partially connect the two flow channels, so that the fluid can enter the valve cavity from one of the two flow channels and be discharged from the valve cavity from the other flow channel. This is suitable for occasions where only one flow channel is needed to flow out the fluid, avoiding the waste of fluid caused by the circulation of multiple flow channels.

[0012] In some embodiments of the present application, the valve core can be rotated to completely block the flow channel group to short-circuit the three-way valve. In this way, when all flow channels need to be closed, no additional valves need to be set.

[0013] In some embodiments of the present application, the flow channel group includes a first flow channel, a second flow channel and a third flow channel, and the first flow channel, the second flow channel and the third flow channel are arranged at intervals along the circumference of the valve housing; the valve core includes an axially extending first baffle, a second baffle and a third baffle, and the first baffle, the second baffle and the third baffle are arranged at intervals along the circumference of the valve core, and the lengths of the first flow channel, the second flow channel and the third flow channel along the circumference of the valve core are respectively smaller than the one with the smallest width among the first baffle, the second baffle and the third baffle, so that the first baffle, the second baffle and the third baffle can respectively achieve complete blocking of the first flow channel, the second flow channel and the third flow channel.

[0014] In some embodiments of the present application, the distance between any two adjacent ones of the first flow channel, the second flow channel, and the third flow channel is greater than the one with the largest width among the first baffle, the second baffle, and the third baffle, so that the first baffle, the second baffle, and the third baffle can be rotated respectively to be completely misaligned with the first opening of the flow channel without blocking the first opening.

[0015] In some embodiments of the present application, the valve core also includes a first end cover and a second end cover, the first end cover and the second end cover are coaxially arranged, the first end cover is connected to the valve controller, and the second end cover is cooperatively connected to the valve housing on a side away from the first end cover; the first baffle, the second baffle and the third baffle are arranged between the first end cover and the second end cover, the widths of the first baffle, the second baffle and the third baffle along the radial circumference of the valve core are different, and the distances between adjacent two of the first baffle, the second baffle and the third baffle are different, so that when the valve core rotates, it can partially block the first flow channel, the second flow channel or the third flow channel, thereby realizing the distribution of fluid flow between two different flow channels.

[0016] In some embodiments of the present application, the first flow channel, the second flow channel and the third flow channel are evenly arranged along the circumference of the valve housing, and the first flow channel, the second flow channel and the third flow channel are of the same size, so that when the valve controller drives the valve body to rotate in coordination with the first flow channel, the second flow channel and the third flow channel, it is easier to calculate the rotation distance of the valve body and simplify the control program. In addition, the first flow channel, the second flow channel and the third flow channel are of the same size, which is more conducive to allocating the flow between the two channels.

[0017] In some embodiments of the present application, an axial body portion is provided on the side of the first end cover away from the second end cover, and circumferentially distributed gear teeth are provided on the axial body portion. The axial body portion is engaged with the valve controller through the gear teeth, which can improve the transmission precision between the valve controller and the valve core, thereby improving the accuracy of flow control of the three-way valve.

[0018] In some embodiments of the present application, a bearing portion extending away from the first end cover is formed on the side of the second end cover away from the first end cover, and the bearing portion is connected to the bottom of the valve housing, and the bearing portion and the valve housing are coaxially arranged, thereby reducing the contact area between the bottom of the valve core and the valve housing, reducing the friction generated by the rotation of the valve core, and ensuring that the valve core can stably rotate relative to the valve housing.

[0019] In some embodiments of the present application, the three-way valve further includes a valve housing cover, the valve housing cover is connected to the side of the valve core close to the first end cover to close the valve cavity, the shaft body passes through the valve housing cover and is connected to the valve controller, a first limit block is provided on the side of the valve housing cover facing the first end cover, and a second limit block is provided on the side of the first end cover facing the valve housing cover, and the first limit block and the second limit block can limit each other in the same circumferential direction to limit the rotation angle of the valve core. The limiting structure formed by the first limit block and the second limit block allows the valve core to form a maximum rotatable angle, so that the rotation angle of the valve core can be accurately controlled when different connection modes between the valve core and the valve housing are realized.

[0020] In some embodiments of the present application, the first flow channel, the second flow channel and the third flow channel are respectively arranged in sequence along the peripheral wall of the valve housing, and the first flow channel, the second flow channel and the third flow channel respectively include a first opening and a second opening, the first opening is arranged on the inner wall of the valve housing and is arranged toward the valve cavity, and the second opening is arranged at the bottom of the valve housing to facilitate the adjustment of the distribution of the fluid in different flow channels.

[0021] In some embodiments of the present application, a first through hole is formed between the first baffle and the second baffle, a second through hole is formed between the second baffle and the third baffle, and a third through hole is formed between the third baffle and the first baffle; the three-way valve also includes a sealing gasket, which is arranged between the valve housing and the valve core, and a fourth through hole, a fifth through hole and a sixth through hole are arranged on the sealing gasket, and the fourth through hole, the fifth through hole and the sixth through hole are arranged one-to-one with the first through hole, the second through hole and the third through hole, respectively. The sealing gasket can reduce the rigid friction between the valve housing and the valve core, and improve the service life of the three-way valve. The arrangement of the fourth through hole, the fifth through hole and the sixth through hole ensures that the sealing gasket will not affect the liquid outlet channel formed between the valve core and the valve housing.

[0022] In some embodiments of the present application, a positioning opening is provided on the sealing gasket, and a positioning block is provided on the valve housing. The positioning opening is correspondingly connected to the positioning block to ensure the stability of the relative position between the valve housing and the sealing gasket, and to avoid displacement of the sealing gasket and obstruction of the first flow channel, the second flow channel and the third flow channel on the valve housing.

[0023] In some embodiments of the present application, the width of the positioning opening located on the inner side of the sealing gasket is smaller than its width located on the outer side of the sealing gasket; the width of the positioning block close to the inner side of the sealing gasket is smaller than its width close to the outer side of the sealing gasket, thereby further improving the connection stability between the sealing gasket and the valve housing.

[0024] In some embodiments of the present application, the sealing gasket includes a first sealing ring and a second sealing ring, the second sealing ring is sleeved on the outer side of the first sealing ring, flanges are respectively provided at both axial ends of the first sealing ring, and both axial ends of the second sealing ring are respectively limited between the flanges at both axial ends of the first sealing ring to ensure the connection stability and integrity between the first sealing ring and the second sealing ring.

[0025] On the other hand, the present application also provides a thermal management system for a vehicle, the thermal management system comprising a thermal management control unit, a connecting pipeline and a three-way valve as described in any one of the above items, the three-way valve being arranged on the connecting pipeline and electrically connected to the thermal management control unit. The three-way valve can switch the position of the valve core according to the mode requirements issued by the thermal management control unit to form different liquid outlet channels, thereby improving the heat utilization efficiency of the vehicle.

[0026] The present application also provides a vehicle, comprising a vehicle body and the thermal management system as described above, wherein the thermal management system is arranged on the vehicle body. The vehicle can achieve different thermal management mode requirements under different driving modes through the thermal management system.

[0027] Beneficial effects:

[0028] The three-way valve provided in the present application forms a valve cavity and a flow channel group on the valve housing, the flow channel group is provided with three flow channels for fluid to pass through, the flow channels can be used for fluid to enter or flow out of the valve cavity, and the valve core is arranged in the valve cavity and connected to the valve controller. The valve controller can control the axial rotation of the valve core relative to the valve housing, change the relative position of the valve housing and the valve core, thereby changing the flow area of ​​the flow channel toward one end of the valve cavity, so that different flow states can be formed between the flow channels of the three-way valve without adding an additional valve body, so as to adapt to different flow mode requirements.

[0029] The thermal management system of the vehicle provided in the present application can switch the position of the valve core according to the mode requirements issued by the thermal management control unit to form different liquid outlet channels and improve the heat utilization efficiency of the vehicle.

[0030] The vehicle provided in the present application can achieve the heat exchange requirements of different driving modes through the above-mentioned thermal management system, thereby improving the heat utilization efficiency of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic structural diagram of a three-way valve provided in one embodiment of the present application.

[0032] Figure 2 A schematic structural diagram of a one-way valve provided in another embodiment of the present application.

[0033] Figure 3 for Figure 2Cross-sectional view along the G-G direction.

[0034] Figure 4 for Figure 2 Cross-sectional view along the F-F direction.

[0035] Figure 5 A schematic structural diagram of a valve housing provided in one embodiment of the present application.

[0036] Figure 6 A schematic structural diagram of a valve housing provided in another embodiment of the present application.

[0037] Figure 7 A schematic diagram of the structure of a sealing gasket provided in one embodiment of the present application.

[0038] Figure 8 A schematic diagram of the structure of a valve core provided in one embodiment of the present application.

[0039] Fig. 9 A schematic structural diagram of a valve housing cover provided in one embodiment of the present application.

[0040] Fig.10 A schematic diagram of the connection structure between the valve core and the valve housing cover provided in one embodiment of the present application.

[0041] Explanation of the main component symbols: 1. Valve housing; 11. Valve cavity; 12. First flow channel; 13. Second flow channel; 14. Third flow channel; 12a / 13a / 14a, First opening; 12b / 13b / 14b, Second opening; 15. Positioning block; 2. Valve core; 21. First baffle plate; 22. Second baffle plate; 23. Third baffle plate; 24. First end cover; 241. Shaft body; 2411. Gear teeth; 242. Second limit block; 25. Second end cover; 251. Bearing; 26. First through hole; 27. Second through hole; 28. Third through hole; 3. Valve controller; 4. Valve housing cover; 41. First limit block; 5. Sealing gasket; 5a. First sealing ring; 5a1. Flange; 5b. Second sealing ring; 51. Fourth through hole; 52. Fifth through hole; 53. Sixth through hole; 54. Positioning opening. DETAILED DESCRIPTION

[0042] The present application provides a three-way valve, a thermal management system for a vehicle, and a vehicle. To make the purpose, technical solution, and effect of the present application clearer and more specific, the present application is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0043] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, and a specific orientation structure and operation, and therefore, cannot be understood as a limitation on the present application. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0044] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0045] Whether it is a fuel vehicle, a hybrid vehicle or a pure electric vehicle, thermal management affects the vehicle's energy consumption and environmental performance, and is receiving increasing attention.

[0046] The present application provides a vehicle, including a vehicle body and a thermal management system arranged on the vehicle body. A three-way valve is arranged on the cooling circuit of the thermal management system. The three-way valve can achieve connectivity between any two circuits and can also achieve blocking of each passage, thereby avoiding unnecessary heat loss and achieving energy-saving effect.

[0047] For details, please refer to Figures 1 to 4 The three-way valve includes a valve housing 1, a valve core 2 and a valve controller 3.

[0048] The valve housing 1 and the valve core 2 are made of injection-molded polyamide material, which has excellent mechanical properties, so that the three-way valve has high strength and hardness, and good wear resistance, which can improve the service life of the three-way valve to a certain extent.

[0049] The valve housing 1 is formed with a cylindrical shell and a seat body connected to the bottom of the shell. The shell is hollow to form a valve cavity 11. The shell is also provided with a flow channel group, which is provided with at least three flow channels for fluid to pass through. The fluid can enter or flow out of the valve cavity 11 through the flow channels.

[0050] The valve core 2 is disposed in the valve cavity 11 and can rotate axially relative to the valve housing 1 to connect or block the flow passage.

[0051] One axial end of the valve core 2 protrudes from the valve housing 1 and engages with the valve controller 3. The valve controller 3 can control the valve core 2 to rotate in the valve cavity 11 so that a variety of different flow states are formed between the valve core 2 and the flow channel group. In the above, as the valve core 2 rotates, the relative position between the valve housing 1 and the valve core 2 changes, so that the blocking area of ​​the valve core 2 on different flow channels changes, thereby changing the different flow modes of the three-way valve. It is highly flexible and can adapt to different flow state requirements. When the three-way valve is applied to the vehicle thermal management system, it can switch to the corresponding flow state according to the heat exchange requirements of different usage modes, reduce energy consumption, and improve heat utilization.

[0052] In some embodiments, a first opening 12a / 13a / 14a is provided at one end of the flow channel toward the valve cavity 11, and the outer wall of the valve core 2 can intercept the first opening 12a / 13a / 14a, so that when the valve core 2 rotates, the valve core 2 can form different interception areas with the first opening 12a / 13a / 14a, thereby changing the flow rate of the fluid passing through the flow channel, and the operation is simple. Specifically, the valve core 2 can rotate to completely block the first opening 12a / 13a / 14a, or the valve core 2 can rotate to partially block the first opening 12a / 13a / 14a, or the valve core 2 can rotate to completely misalign with the first opening 12a / 13a / 14a, so that the first opening 12a / 13a / 14a is completely open toward one end of the valve cavity 11.

[0053] Multiple baffles can be provided on the valve core 2, and the number of the baffles can correspond to the first opening. The baffles can intercept the first opening 12a / 13a / 14a, so that when the valve core 2 rotates, different interception areas can be formed between the baffles and the first opening 12a / 13a / 14a, thereby changing the flow rate of the fluid in each flow channel.

[0054] The valve core 2 can be rotated to fully connect at least three flow channels; or, the valve core 2 can be rotated to partially connect at least three flow channels, for example, the valve core 2 can fully connect one flow channel, and partially connect two flow channels, and for another example, the valve core 2 can partially connect one flow channel, and fully connect two flow channels; at this time, the fluid can enter the valve cavity 11 from one of the flow channels, and be discharged from the valve cavity 11 from the remaining at least two connected flow channels, and the flow channels used for the fluid to enter the valve cavity 11 and to be discharged from the valve cavity 11 can be limited to the corresponding flow channels according to actual usage. Furthermore, rotating the valve core 2 can adjust the flow rate of the fluid entering the flow channel, so that the flow rate of the fluid flowing out of different flow channels can be adjusted according to the usage, with high flexibility.

[0055] The valve core 2 can also be rotated to fully connect the two flow channels, or the valve core 2 can be rotated to partially connect the two flow channels. At this time, the fluid can enter the valve cavity 11 from one of the two connected flow channels, and discharge the valve cavity 11 from the other, that is, a liquid inlet channel and a liquid outlet channel are formed in the three-way valve, which is suitable for use in occasions where fluid diversion is not required, avoiding the waste of fluid caused by the formation of multiple liquid outlet channels. Rotating the valve core 2 can change the blocking area of ​​the flow channel by the baffle, thereby adjusting the flow rate of the flow channel. For example, when the valve core 2 fully connects the two flow channels, if it is necessary to reduce the flow rate of the liquid outlet channel, the valve core 2 can be rotated so that the baffle corresponding to the channel for discharging the fluid partially blocks the channel. The larger the blocking area, the smaller the flow rate of the fluid entering the flow channel.

[0056] The valve core 2 can also be rotated to completely block all flow channels. At this time, the three-way valve is short-circuited, so that all flow channels can be closed without the help of other valve bodies, reducing the use of valve bodies and simplifying the flow path structure.

[0057] In one embodiment, the flow channel group includes a first flow channel 12, a second flow channel 13 and a third flow channel 14, and the first flow channel 12, the second flow channel 13 and the third flow channel 14 are arranged at intervals along the circumference of the valve housing 1, and the valve core 2 includes an axially extended first baffle 21, a second baffle 22, and a third baffle 23, and the first baffle 21, the second baffle 22, and the third baffle 23 are arranged at intervals along the circumference of the valve core 2. The lengths of the first flow channel 12, the second flow channel 13 and the third flow channel 14 along the circumference of the valve core 2 are respectively smaller than the one with the smallest width among the first baffle 21, the second baffle 22, and the third baffle 23. Here, the width directions of the first baffle 21, the second baffle 22, and the third baffle 23 are consistent with the directions of the corresponding flow channels along the circumference of the valve core 2, so as to ensure that the first baffle, the second baffle and the third baffle can be rotated in the rotation direction to completely block the first flow channel 12, the second flow channel 13 and the third flow channel 14.

[0058] The distance between any two adjacent ones of the first flow channel 12, the second flow channel 13 and the third flow channel 14 is greater than the largest one of the first baffle 21, the second baffle 22 and the third baffle 23, so that the first baffle 21, the second baffle 22 and the third baffle 23 can all rotate to a position between two adjacent flow channels, completely misaligned with the flow channels, and not blocking the flow channels. At this time, all flow channels are in a connected state.

[0059] When any one of the first flow channel 12 , the second flow channel 13 and the third flow channel 14 is completely blocked, a liquid outlet channel can be formed between the other two and the valve core 2 .

[0060] When the fluid can all pass through the first flow channel 12, the second flow channel 13 and the third flow channel 14, a liquid inlet channel and two liquid outlet channels for distributing the flow rate can be formed between the first flow channel 12, the second flow channel 13 and the third flow channel 14 and the valve core 2. At this time, the first flow channel 12, the second flow channel 13 and the third flow channel 14 may not be blocked, or one of the first flow channel 12, the second flow channel 13 and the third flow channel 14 may be partially blocked, and the other two may not be blocked, or two of the first flow channel 12, the second flow channel 13 and the third flow channel 14 may be partially blocked, and the remaining one may not be blocked.

[0061] When any two of the first flow channel 12 , the second flow channel 13 and the third flow channel 14 are completely blocked or all three are completely blocked, the valve core 2 is disconnected from the valve housing 1 and no liquid outlet channel can be formed.

[0062] like Figure 3 and Figure 8 As shown, the valve core 2 also includes a first end cover 24 and a second end cover 25, which are coaxially arranged to ensure the stability of the rotation of the valve core 2; the first end cover 24 is connected to the valve controller 3, and the second end cover 25 is cooperatively connected to the valve housing 1 on a side away from the first end cover 24; the first baffle 21, the second baffle 22 and the third baffle 23 are arranged between the first end cover 24 and the second end cover 25, and the circumferential widths of the circumference formed by the first baffle 21, the second baffle 22 and the third baffle 23 along the radial direction of the valve core 2 are different, and the distances between the adjacent two of the first baffle 21, the second baffle 22 and the third baffle 23 are different. At least one of the first baffle 21, the second baffle 22 and the third baffle 23 is arranged on any semicircle of the circumferential surface formed by the three, and the other is arranged on the remaining semicircle. When the valve core 2 rotates, the first baffle 21, the second baffle 22 and the third baffle 23 can partially block the first flow channel 12, the second flow channel 13 or the third flow channel 14, so as to realize the distribution of the fluid flow between two different liquid outlet channels, and also enable the first baffle 21, the second baffle 22 and the third baffle 23 to completely block two of the first flow channel 12, the second flow channel 13 and the third flow channel 14. It is worth noting that the size of the first opening 12a / 13a / 14a of the first flow channel 12, the second flow channel 13 and the third flow channel 14 is smaller than the one with the middle width among the first baffle 21, the second baffle 22 and the third baffle 23, and the latter is smaller than the one with the smallest width among the first baffle 21, the second baffle 22 and the third baffle 23, so as to ensure that the first flow channel 12, the second flow channel 13 and the third flow channel 14 can be completely blocked.

[0063] like Figure 4As shown, the first flow channel 12, the second flow channel 13 and the third flow channel 14 are evenly arranged along the circumference of the valve housing 1, and the first flow channel 12, the second flow channel 13 and the third flow channel 14 are of the same size, so that when the valve controller 3 drives the valve body to rotate in coordination with the first flow channel 13 and the third flow channel 14, it is easier to calculate the rotation distance of the valve body and simplify the control program. In addition, the first flow channel 12, the second flow channel 13 and the third flow channel 14 are of the same size, which is more conducive to allocating the flow between the two channels.

[0064] like Figure 8 As shown, a shaft portion 241 is provided on the side of the first end cover 24 away from the second end cover 25, and circumferentially distributed gear teeth 2411 are provided on the shaft portion 241. The valve controller 3 includes a controller housing, and a motor, a transmission gear, a control chip, etc. arranged in the controller housing. The motor is connected to the shaft portion 241 of the first end cover 24 through the transmission gear. The gears have high traditional precision and high transmission efficiency, which can improve the transmission precision between the valve controller 3 and the valve core 2, thereby improving the accuracy of flow control of the three-way valve.

[0065] like Figure 3 and Fig.10 As shown, a bearing portion 251 extending away from the first end cover 24 is formed on the side of the second end cover 25 away from the first end cover 24, and the bearing portion 251 is connected to the bottom of the valve housing 1, and the bearing portion 251 and the valve housing 1 are coaxially arranged, thereby reducing the contact area between the bottom of the valve core 2 and the valve housing 1, reducing the friction force generated by the rotation of the valve core 2, and ensuring that the valve core 2 can stably rotate relative to the valve housing 1.

[0066] like Figure 3 , Fig. 9 and Fig.10 As shown, the three-way valve also includes a valve housing cover 4, which is connected to the side of the valve core 2 close to the first end cover 24 to close the valve cavity 11; in this embodiment, the valve housing cover 4 is connected to the valve housing 1 by screws, which is stable and easy to disassemble, so as to facilitate the maintenance of the valve body. The shaft body 241 passes through the valve housing cover 4 and is connected to the valve controller 3. The valve housing cover 4 is provided with a first limit block 41 on the side facing the first end cover 24, and the first end cover 24 is provided with a second limit block 242 on the side facing the valve housing cover 4. The first limit block 41 and the second limit block 242 can limit each other in the same circumferential direction to limit the rotation angle of the valve core 2. The limiting structure formed by the first limiting block 41 and the second limiting block 242 enables the valve core 2 to form a maximum rotatable angle and can specify the forward direction (towards the maximum stroke direction) or reverse direction (towards the starting position) of the valve body rotation, so that when realizing different connection modes between the valve core 2 and the valve housing 1, the rotation angle of the valve core 2 can be accurately controlled so that the valve core 2 can stay in the appropriate position.

[0067] like Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown, the first flow channel 12, the second flow channel 13 and the third flow channel 14 are respectively arranged in sequence along the peripheral wall of the valve housing 1, and the first flow channel 12, the second flow channel 13 and the third flow channel 14 respectively include a first opening 12a / 13a / 14a and a second opening 12b / 13b / 14b, the first opening 12a / 13a / 14a is arranged on the inner wall of the valve housing 1 and is arranged toward the valve cavity 11, and the second opening 12b / 13b / 14b is arranged at the bottom of the valve housing 1, so as to facilitate the adjustment of the distribution of the fluid in different liquid outlet channels.

[0068] like Figure 4 , Figure 7 and Figure 8 As shown, a first through hole 26 is formed between the first baffle 21 and the second baffle 22, a second through hole 27 is formed between the second baffle 22 and the third baffle 23, and a third through hole 28 is formed between the third baffle 23 and the first baffle 21; the three-way valve also includes a sealing gasket 5, which is arranged between the valve housing 1 and the valve core 2, and is provided with a fourth through hole 51, a fifth through hole 52 and a sixth through hole 53, which are arranged one-to-one with the first through hole 26, the second through hole 27 and the third through hole 28 respectively. The sealing gasket 5 can reduce the rigid friction between the valve housing 1 and the valve core 2, improve the service life of the three-way valve, and can also improve the connection sealing between the valve housing 1 and the valve core 2. The arrangement of the fourth through hole 51, the fifth through hole 52 and the sixth through hole 53 ensures that the sealing gasket 5 will not affect the liquid outlet channel formed between the valve core 2 and the valve housing 1.

[0069] like Figure 7 As shown, a positioning opening 54 is provided on the sealing gasket 5, and the positioning opening 54 extends along the axial direction of the sealing gasket 5. A positioning block 15 is provided on the valve housing 1, and the positioning opening 54 is correspondingly connected to the positioning block 15. The side wall of the positioning block 15 abuts against the two side walls of the positioning opening 54, so that the sealing gasket 5 will not shift in the circumferential direction, thereby ensuring the stability of the relative position between the valve housing 1 and the sealing gasket 5 and avoiding the sealing gasket 5 from shifting and blocking the first flow channel 12, the second flow channel 13 and the third flow channel 14 on the valve housing 1.

[0070] like Figure 5 and Figure 7As shown, the width of the positioning opening 54 on the inner side of the sealing gasket 5 is smaller than the width on the outer side of the sealing gasket 5; the two side walls of the positioning opening 54 form a guide structure, so that the positioning block 15 can be quickly inserted into the positioning opening 54, and the rapid positioning between the sealing gasket 5 and the valve housing 1 is achieved. The width of the positioning block 15 close to the inner side of the sealing gasket 5 is smaller than the width close to the outer side of the sealing gasket 5, corresponding to the two side walls of the positioning opening 54, so that the side walls of the positioning block 15 can abut against the two side walls of the positioning opening 54, further improving the connection stability between the sealing gasket 5 and the valve housing 1.

[0071] like Figure 7 As shown, the sealing gasket 5 includes a first sealing ring 5a and a second sealing ring 5b. The second sealing ring 5b is sleeved on the outer side of the first sealing ring 5a. The first sealing ring is provided with flanges 5a1 at both axial ends. The second sealing ring 5b is limited between the flanges 5a1 at both axial ends of the first sealing ring 5a. The two axial side walls of the first sealing ring 5a formed at the positioning opening 54 protrude toward the outside and can be limited in the circumferential direction relative to the second sealing ring 5b to ensure the connection stability and integrity between the first sealing ring 5a and the second sealing ring 5b.

[0072] In some embodiments of the present application, the first sealing ring 5a is a rubber part, which can be tightly connected to the valve core 2 to improve the tightness of the connection between the valve core 2 and the valve housing 1; the second sealing ring 5b is a polytetrafluoroethylene part, which has a certain strength and improves the mechanical strength of the sealing ring. In addition, it can also produce a good lubrication effect between the inner wall of the valve housing 1.

[0073] On the other hand, the present application also provides a control method for a three-way valve. The three-way valve has the above structure, which will not be described in detail here. The three-way valve is applied to a thermal management system of a vehicle and is electrically connected to a thermal management control unit of the vehicle. The control method includes:

[0074] The three-way valve performs a self-test on power on, controls the valve core 2 to rotate, confirms the maximum stroke position Pmax of the valve core 2, and then rotates the valve core 2 back to the initial position Pmin;

[0075] The valve controller 3 controls the valve core 2 to rotate, obtains the time T1 required for the valve core 2 to rotate from the initial position Pmin to the maximum stroke position Pmax, and the time T2 required for the valve core 2 to rotate from the maximum stroke position Pmax to the initial position Pmin, and calculates the average value T of T1 and T2;

[0076] Receive a mode request from the vehicle thermal management control unit, and obtain the current position Pp, target position Pt, and target flow ratio Ri of the valve core 2;

[0077] If the current position Pp is not equal to the target position Pt, the difference dP between the target position and the current position is calculated, and the time Ti required for the valve core 2 to rotate to the target position is calculated by the difference dP between the target position and the current position, the maximum stroke position Pmax of the valve core 2, the initial position Pmin of the valve core 2, and the average maximum stroke time T; the valve core 2 is controlled to rotate to the target position. It is worth noting that the rotation speed of the valve core 2 remains unchanged during the rotation process.

[0078] The control method obtains the rotation information of the valve core 2 by calculation and controls the rotation time of the valve core 2, so that the valve core 2 can reach different target positions, form different liquid outlet channels, realize various thermal management requirements of the vehicle, and improve the thermal efficiency of the vehicle. In addition, the control method is relatively simple and easy to control.

[0079] Specifically, the three-way valve includes 7 opening modes, among which mode 1, mode 2 and mode 3 can form one liquid outlet flow channel, mode 4, mode 5 and mode 6 can form two liquid outlet flow channels, and the flow distribution can be achieved between the two liquid outlet flow channels; mode 7 can achieve short-circuit of the three-way valve to reduce heat loss. Specifically, the connection conditions of each mode are as follows:

[0080] Mode 1, the first flow channel 12 and the second flow channel 13 are connected, and the third flow channel 14 is short-circuited;

[0081] Mode 2, the second flow channel 13 and the third flow channel 14 are connected, and the first flow channel 12 is short-circuited;

[0082] Mode three, the first flow channel 12 and the third flow channel 14 are connected, and the second flow channel 13 is short-circuited;

[0083] Mode 4: the first flow channel 12 is a liquid inlet channel, the second flow channel 13 and the third flow channel 14 are liquid outlet channels, and the flow ratio Ri between the second flow channel 13 and the third flow channel 14 is between [0.05, 0.9];

[0084] Mode 5, the second flow channel 13 is a liquid inlet channel, the first flow channel 12 and the third flow channel 14 are liquid outlet channels, and the flow ratio Ri between the first flow channel 12 and the third flow channel 14 is between [0.05, 0.9];

[0085] Mode 6, the third flow channel 14 is a liquid inlet channel, the first flow channel 12 and the second flow channel 13 are liquid outlet channels, and the flow ratio between the first flow channel 12 and the second flow channel 13 is between [0.05, 0.9];

[0086] Mode seven, the first flow channel 12, the second flow channel 13 and the third flow channel 14 are all short-circuited.

[0087] In the above, the valve core 2 can be rotated to different positions to form different liquid outlet channels with the valve housing 1 to meet the needs of more different driving modes.

[0088] Exemplarily, the valve body is set at an initial position as a theoretical zero point, and at this time, the first flow channel 12, the second flow channel 13 and the third flow channel 14 are all in a connected state;

[0089] If it is necessary to switch to mode 1, the valve core Pt1 can be rotated to connect the first flow channel 12 and the second flow channel 13 and short-circuit the third flow channel 14.

[0090] If it is necessary to switch to the second mode, the valve core 2 can be rotated to the Pt2 stroke, so that the second flow channel 13 and the third flow channel 14 are connected and the first flow channel 12 is short-circuited.

[0091] If it is necessary to switch to mode three, the valve core 2 can be rotated to the Pt3 stroke, so that the first flow channel 12 and the third flow channel 14 are connected and the second flow channel 13 is short-circuited.

[0092] If it is necessary to switch to mode 4, the valve core 2 can be rotated first to block the second flow channel 13, and then the valve core 2 can be continued to be rotated to adjust the connection cross-sectional area of ​​the second flow channel 13 and the third flow channel 14 according to the flow ratio between the second flow channel 13 and the third flow channel 14.

[0093] If it is necessary to switch to mode five, the valve core 2 can be rotated first to block the first flow channel 12 , and then the valve core 2 can be continued to be rotated to adjust the connection cross-sectional area of ​​the first flow channel 12 and the third flow channel 14 according to the flow ratio between the first flow channel 12 and the third flow channel 14 .

[0094] If it is necessary to switch to mode six, the valve core 2 can be rotated first to block the second flow channel 13, and then the valve core 2 can be further rotated to adjust the connection cross-sectional area of ​​the first flow channel 12 and the second flow channel 13 according to the flow ratio between the first flow channel 12 and the second flow channel 13.

[0095] If it is necessary to switch to mode seven, the second flow channel 13 and the third flow channel 14 are blocked to achieve short circuit of all flow channels.

[0096] When the required opening mode of the three-way valve is mode 1, mode 2 or mode 3, the rotation time of the valve core 2 is Ti=a*dP / (Pmax-Pmin)*T; the valve core 2 can reach the target position after rotating Ti×Si distance, where Si is the rotation speed of the valve core 2.

[0097] When the required opening mode of the three-way valve is mode four, mode five or mode six, and Ri=0.5, the rotation time of the valve core 2 is Ti=a*dP / (Pmax-Pmin)*T; the valve core 2 can reach the target position after rotating the distance Ti×Si, where Si is the rotation speed of the valve core 2.

[0098] When the required opening mode of the three-way valve is mode four, mode five or mode six, and Ri<0.5, the rotation time of the valve core 2 is Ti=a*dP / (Pmax-Pmin)*T / 10; the valve core 2 can reach the target position after rotating the distance Ti×Si, where Si is the rotation speed of the valve core 2.

[0099] When the required opening mode of the three-way valve is mode four, mode five or mode six, and Ri>0.5, the rotation time of the valve core 2 is Ti=a*dP / (Pmax-Pmin)*T / 10; the valve core 2 can reach the target position after rotating the distance Ti×Si, where Si is the rotation speed of the valve core 2.

[0100] When the opening mode required by the three-way valve is mode seven, the rotation time of the valve core 2 is Ti=a*dP / (Pmax-Pmin)*T; the valve core 2 can reach the target position after rotating Ti×Si distance, where Si is the rotation speed of the valve core 2.

[0101] In the above, a is the time coefficient, and the value of a ranges from 0.1 to 0.5.

[0102] On the other hand, the present application also provides a vehicle thermal management system, which includes an engine water jacket, a water pump, a heater assembly, a temperature sensor, a thermal management control unit, connecting pipes and any of the above three-way valves. The thermal management unit is electrically connected to the water pump, the heater assembly, the temperature sensor and the three-way valve, respectively. The engine water jacket, the water pump, the heater assembly and the three-way valve are connected by connecting pipes to form a circulating cooling circuit. The three-way valve can switch the position of the valve core 2 according to the mode requirements issued by the thermal management control unit to form different liquid outlet channels, thereby improving the heat utilization efficiency of the vehicle.

[0103] In summary, the present application sets a rotatable valve core 2 on the valve cavity 11 formed in the valve housing 1, and sets a first baffle 21, a second baffle 22 and a third baffle 23 on the valve core 2 at circumferential intervals. The first baffle 21, the second baffle 22 and the third baffle 23 can form a partial block, a complete block or no blockage with the first channel, the second channel and the third channel on the valve housing 1, so that any two interconnected liquid outlet channels can be formed between the valve housing 1 and the valve core 2, or only one liquid outlet channel can be formed, or a blocked state can be achieved, which is suitable for more different heat exchange modes and improves the utilization rate of heat in the thermal management system. When the three-way valve is in a blocked state, it can reduce heat loss and reduce energy consumption.

[0104] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and application concept of the present application, and all these changes or substitutions should fall within the protection scope of the claims attached to the present application.

Claims

1. A three-way valve, characterized in that: include: A valve housing is formed with a valve cavity and a flow channel group, wherein the flow channel group is provided with at least three flow channels for fluid to pass through, and the flow channels can be used for the fluid to enter or flow out of the valve cavity; A valve core is disposed in the valve cavity and can rotate axially relative to the valve housing to connect or block the flow channel; The valve controller is connected to the valve core and can control the rotation of the valve core so as to form a plurality of different flow states between the valve core and the flow channel group.

2. The three-way valve according to claim 1, characterized in that: A first opening is provided at one end of the flow channel facing the valve cavity, and the valve core can intercept the first opening, so that when the valve core rotates, the valve core and the first opening can form different interception areas.

3. The three-way valve according to claim 2, characterized in that: The valve core is provided with a plurality of baffles, which are arranged corresponding to the first opening and can intercept the first opening, so that when the valve core rotates, the baffles can form different interception areas with the first opening.

4. The three-way valve according to claim 2, characterized in that: The valve core can be rotated to fully or partially connect at least three of the flow channels, so that the fluid can enter the valve cavity from one of the flow channels and be discharged from the valve cavity from at least two of the flow channels, and rotating the valve core can adjust the flow rate of the fluid entering the flow channels.

5. The three-way valve according to claim 2, characterized in that: The valve core can be rotated to fully or partially connect the two flow passages, so that the fluid can enter the valve cavity from one of the two flow passages and be discharged from the valve cavity from the other flow passage.

6. The three-way valve according to claim 2, characterized in that: The valve core can be rotated to completely block the flow channel group so as to short-circuit the three-way valve.

7. The three-way valve according to any one of claims 1 to 6, characterized in that: The flow channel group includes a first flow channel, a second flow channel and a third flow channel, and the first flow channel, the second flow channel and the third flow channel are arranged at intervals along the circumferential direction of the valve housing; The valve core includes an axially extending first baffle, a second baffle and a third baffle, the first baffle, the second baffle and the third baffle are arranged at intervals along the circumference of the valve core, and the lengths of the first flow channel, the second flow channel and the third flow channel along the circumference of the valve core are respectively smaller than the one with the smallest width among the first baffle, the second baffle and the third baffle.

8. The three-way valve according to claim 7, characterized in that: A distance between two adjacent ones of the first flow channel, the second flow channel and the third flow channel is greater than the one with the largest width among the first baffle plate, the second baffle plate and the third baffle plate.

9. The three-way valve according to claim 8, characterized in that: The valve core also includes: A first end cover and a second end cover, wherein the first end cover and the second end cover are coaxially arranged, the first end cover is connected to the valve controller, and a side of the second end cover away from the first end cover is cooperatively connected to the valve housing; The first baffle, the second baffle and the third baffle are arranged between the first end cover and the second end cover, the widths of the first baffle, the second baffle and the third baffle along the radial circumference of the valve core are different, and the distances between two adjacent ones of the first baffle, the second baffle and the third baffle are different.

10. The three-way valve according to claim 9, characterized in that: The first flow channel, the second flow channel and the third flow channel are evenly arranged along the circumference of the valve housing, and the first flow channel, the second flow channel and the third flow channel have the same size.

11. The three-way valve according to claim 9, characterized in that: A shaft body is provided on a side of the first end cover away from the second end cover, and gear teeth distributed circumferentially are provided on the shaft body. The shaft body is meshed with the valve controller through the gear teeth.

12. The three-way valve according to claim 11, characterized in that: A bearing portion extending away from the first end cover is formed on a side of the second end cover away from the first end cover, the bearing portion is connected to the bottom of the valve housing, and the bearing portion and the valve housing are coaxially arranged.

13. The three-way valve according to claim 11, characterized in that: The three-way valve also includes a valve housing cover, which is connected to a side of the valve core close to the first end cover to close the valve cavity. The shaft portion passes through the valve housing cover and is connected to the valve controller. A first limit block is provided on the side of the valve housing cover facing the first end cover, and a second limit block is provided on the side of the first end cover facing the valve housing cover. The first limit block and the second limit block can limit each other in the same circumferential direction to limit the rotation angle of the valve core.

14. The three-way valve according to claim 7, characterized in that: The first flow channel, the second flow channel and the third flow channel are respectively arranged in sequence along the peripheral wall of the valve housing, and the first flow channel, the second flow channel and the third flow channel respectively include a first opening and a second opening, the first opening is arranged on the inner wall of the valve housing and is arranged toward the valve cavity, and the second opening is arranged at the bottom of the valve housing.

15. The three-way valve according to claim 7, characterized in that: A first via hole is formed between the first baffle plate and the second baffle plate, a second via hole is formed between the second baffle plate and the third baffle plate, and a third via hole is formed between the third baffle plate and the first baffle plate; The three-way valve also includes a sealing gasket, which is arranged between the valve housing and the valve core. The sealing gasket is provided with a fourth through hole, a fifth through hole and a sixth through hole, and the fourth through hole, the fifth through hole and the sixth through hole are respectively arranged in a one-to-one correspondence with the first through hole, the second through hole and the third through hole.

16. The three-way valve according to claim 15, characterized in that: The sealing gasket is provided with a positioning opening, the valve housing is provided with a positioning block, and the positioning opening is correspondingly connected to the positioning block.

17. The three-way valve according to claim 16, characterized in that: The width of the positioning opening at the inner side of the sealing gasket is smaller than the width thereof at the outer side of the sealing gasket; the width of the positioning block close to the inner side of the sealing gasket is smaller than the width thereof close to the outer side of the sealing gasket.

18. The three-way valve according to claim 17, characterized in that: The sealing gasket includes a first sealing ring and a second sealing ring, the second sealing ring is sleeved on the outer side of the first sealing ring, flanges are respectively provided at both axial ends of the first sealing ring, and both axial ends of the second sealing ring are respectively limited between the flanges at both axial ends of the first sealing ring.

19. A thermal management system for a vehicle, characterized in that: The thermal management system comprises a thermal management control unit, a connecting pipeline, and the three-way valve according to any one of claims 1 to 18, wherein the three-way valve is arranged on the connecting pipeline and is electrically connected to the thermal management control unit.

20. A vehicle, characterized in that: It comprises a vehicle body, and the thermal management system as claimed in claim 19, wherein the thermal management system is arranged on the vehicle body.

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