Valve devices and vehicles

Abstract

This invention discloses a valve device and a vehicle. The valve device includes: a valve housing with a valve port inside; a valve stem that selectively reciprocates along the axial direction of the valve housing; and a valve core that drives the valve stem. The valve core has end face sealing portions and side face sealing portions spaced apart along the axial direction of the valve housing. By having the valve core with end face sealing portions and side face sealing portions spaced apart along the axial direction of the valve housing, and the end face sealing portions selectively opening and closing the valve port, the side face sealing portions and end face sealing portions can sequentially contact or separate from the inner wall of the valve housing during the axial movement of the valve core driven by the valve stem. This not only enables multi-stage opening and closing control of the valve port but also allows for precise control of fluid flow by adjusting the position of the side face sealing portions. Furthermore, it integrates switching and regulating functions, simplifies the overall structure of the valve device, and improves the response speed and control accuracy of the valve device to fluid flow.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a valve device and a vehicle. Background Technology

[0002] With the development of technology and the improvement of people's living standards, vehicles have become an indispensable means of transportation in daily life. Modern vehicles are generally equipped with valve devices to precisely control the on / off state and flow rate of fluids such as coolant, brake fluid, and air conditioning refrigerant, so as to ensure the efficient and stable operation of the power system, thermal management system, and safety system.

[0003] In related technologies, traditional valves typically only have a single on / off function or limited throttling regulation capability. Moreover, the on / off function and the flow regulation function are often implemented by different components. This separate design not only makes it difficult to meet the requirements of high-precision flow control and fast dynamic response, but also results in low system integration, complex structure, high cost, and limits the response speed and control accuracy of the whole vehicle fluid control system. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of the present invention is to provide a valve device with a more reliable structure, which integrates switching and regulating functions, simplifies the overall structure of the valve device, and improves the response speed and control accuracy of the valve device to fluid flow.

[0005] The present invention further proposes a vehicle.

[0006] According to the valve device of the present invention, there are: a valve housing having a valve port disposed therein; a valve stem disposed therein and selectively reciprocating along the axial direction of the valve housing; and a valve core disposed therein and drivingly cooperating with the valve stem, the valve core having an end face sealing portion and a side face sealing portion spaced apart from each other along the axial direction of the valve housing, the end face sealing portion selectively opening and closing the valve port, and the side face sealing portion selectively opening and closing the valve port.

[0007] Therefore, by having the valve core with end face sealing parts and side sealing parts spaced apart along the axial direction of the valve body, the end face sealing parts selectively open and close the valve port, and the side sealing parts selectively open and close the valve port. In this way, during the axial movement of the valve core driven by the valve stem, the side sealing parts and end face sealing parts can sequentially contact or separate from the inner wall of the valve body. This not only enables multi-stage opening and closing control of the valve port, but also allows for precise control of fluid flow by adjusting the position of the side sealing parts. Thus, the switching function and the regulating function are integrated into one, simplifying the overall structure of the valve device and improving the response speed and control accuracy of the valve device to fluid flow.

[0008] In some examples of the present invention, the side sealing part is a side sealing head, which selectively extends into the valve port and abuts against the inner side of the valve port to selectively close the valve port.

[0009] In some examples of the present invention, the end face sealing part is an end face sealing boss, which protrudes outward relative to the side sealing head, and the end face sealing boss selectively abuts against the outer end face of the valve port to close the valve port.

[0010] In some examples of the present invention, the side sealing head is provided with flow guiding slopes on both sides along the axial direction of the valve housing.

[0011] In some examples of the invention, the valve device further includes an elastic element connected between the valve housing and the valve core.

[0012] In some examples of the present invention, a sleeve is provided inside the valve housing, the valve core is movably disposed inside the sleeve and at least partially and selectively extends out of the sleeve, the inner diameter of the sleeve is set to D1, the outer diameter of the side sealing part is set to D2, and D1 and D2 satisfy the relationship: D1=D2.

[0013] In some examples of the present invention, there are two valve ports, namely a first valve port and a second valve port, which are spaced apart in the axial direction of the valve housing. There are two valve cores, namely a first valve core and a second valve core. The first valve core has a first end face sealing portion and a first side face sealing portion spaced apart from each other. The first end face sealing portion selectively opens and closes the first valve port, and the first side face sealing portion selectively opens and closes the first valve port. The second valve core has a second end face sealing portion and a second side face sealing portion spaced apart from each other. The second end face sealing portion selectively opens and closes the second valve port, and the second side face sealing portion selectively opens and closes the second valve port.

[0014] In some examples of the present invention, the valve stem passes through one of the first valve core and the second valve core and has a push block at its end, the push block being located between the first valve core and the second valve core, the push block selectively pushing the first valve core or the second valve core to move axially in the valve housing.

[0015] In some examples of the present invention, the valve housing includes a main housing and a valve seat, the valve seat includes a main body section and an inclined section, the main housing is at least partially fitted outside the main body section, the inclined section is disposed at the end of the main body section and is inclined relative to the main body section, the inclined section forms an acute angle with the main housing, and the inclined section has a second valve port.

[0016] A vehicle according to an embodiment of the present invention includes the valve device described above.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is an exploded view of a valve device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of a valve device according to an embodiment of the present invention; Figure 3 This is a cross-sectional view of the valve device according to an embodiment of the present invention along the AA direction; Figure 4 This is a partial cross-sectional view of the valve device according to an embodiment of the present invention along the AA direction; Figure 5 This is a flow rate curve diagram of a valve device according to an embodiment of the present invention; Figure 6 This is a partial cross-sectional view of the valve device according to an embodiment of the present invention along the AA direction; Figure 7 This is a flow rate curve diagram of a valve device according to an embodiment of the present invention; Figure 8 This is a partial cross-sectional view of the valve device according to an embodiment of the present invention along the AA direction; Figure 9 This is a flow rate curve diagram of a valve device according to an embodiment of the present invention; Figure 10 This is a partial cross-sectional view of the valve device according to an embodiment of the present invention along the AA direction; Figure 11 This is a flow rate curve diagram of a valve device according to an embodiment of the present invention; Figure 12 This is a partial cross-sectional view of the valve device according to an embodiment of the present invention along the AA direction; Figure 13 This is a flow rate curve diagram of a valve device according to an embodiment of the present invention; Figure 14 This is a partial cross-sectional view of the valve device according to an embodiment of the present invention along the AA direction; Figure 15 This is a flow rate curve diagram of a valve device according to an embodiment of the present invention; Figure 16 This is a partial cross-sectional view of the valve device according to an embodiment of the present invention along the AA direction; Figure 17This is a flow rate curve diagram of a valve device according to an embodiment of the present invention; Figure 18 This is a partial cross-sectional view of the valve device according to an embodiment of the present invention along the AA direction; Figure 19 This is a flow rate curve diagram of a valve device according to an embodiment of the present invention; Figure 20 This is a partial cross-sectional view of the valve device according to an embodiment of the present invention along the AA direction; Figure 21 This is a partial cross-sectional view of the valve device according to an embodiment of the present invention along the AA direction; Figure 22 This is a flow rate curve diagram of a valve device according to an embodiment of the present invention; Figure 23 This is a schematic diagram of the first valve core according to an embodiment of the present invention; Figure 24 This is a schematic diagram of the second valve core according to an embodiment of the present invention.

[0019] Figure label: 100. Valve device; 10. Valve housing; 101. Sleeve; 102. Main housing; 103. Valve seat; 1031. Main body section; 1032. Inclined section; 20. Valve stem; 201. Push block; 30. Valve core; 301. End face sealing part; 302. Side sealing part; 3021. Flow guide slope; 303. First valve core; 3031. First end face sealing part; 3032. First side sealing part; 304. Second valve core; 3041. Second end face sealing part; 3042. Second side sealing part; 40. Valve port; 401. First valve port; 402. Second valve port; 50. Elastic element; 501. First elastic element; 502. Second elastic element; 601. First interface; 602. Second interface; 603. Third interface; 70. Drive unit; 701. Rotor assembly; 702. Nut assembly; 703. Screw assembly. Detailed Implementation

[0020] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0021] The following is for reference. Figures 1-24 A valve device 100 according to an embodiment of the present invention is described, which can be applied to a vehicle.

[0022] Combination Figures 1-19As shown, the valve device 100 according to the present invention may mainly include: a valve housing 10, a valve stem 20, and a valve core 30. The valve housing 10 has a valve port 40; the valve stem 20 is disposed within the valve housing 10 and selectively reciprocates along the axial direction of the valve housing 10; the valve core 30 is disposed within the valve housing 10 and drivesly engages with the valve stem 20. The valve core 30 has an end face sealing portion 301 and a side face sealing portion 302 spaced apart along the axial direction of the valve housing 10. The end face sealing portion 301 selectively opens and closes the valve port 40, and the side face sealing portion 302 selectively opens and closes the valve port 40.

[0023] Specifically, a valve port 40 is provided inside the valve housing 10, through which the internal chamber of the valve housing 10 can be connected to the external pipeline, thereby controlling the inflow and outflow of fluid relative to the valve device 100.

[0024] Furthermore, the valve stem 20 is movably disposed within the valve housing 10 and is connected to the drive device 70 for transmission. Under the drive of the drive device 70, the valve stem 20 can reciprocate linearly along the axial direction of the valve housing 10.

[0025] Furthermore, the valve core 30 is disposed within the valve housing 10 and is drivenly engaged with the valve stem 20. The valve core 30 has an end face sealing portion 301 and a side sealing portion 302 spaced apart along the axial direction of the valve housing 10. The end face sealing portion 301 selectively opens and closes the valve port 40, and the side sealing portion 302 selectively opens and closes the valve port 40. Specifically, the valve stem 20 can transmit the driving force from the drive device 70 to the valve core 30, causing the valve core 30 to reciprocate linearly along the axial direction of the valve housing 10. During this process, the end face sealing portion 301 and the side sealing portion 302 will sequentially contact or separate from the inner wall of the valve housing 10, thereby causing the valve port 40 to alternately experience a process of closing, throttling, closing, and throttling during the movement of the valve core 30, realizing two opening and closing controls of the valve port 40.

[0026] Moreover, as the valve core 30 moves in the same direction, the side sealing part 302 will gradually align with or offset from the corresponding valve port 40 in the valve housing 10. When the valve port 40 is open, by controlling the axial displacement of the valve core 30, the flow cross-sectional area between the side sealing part 302 and the valve port 40 can be changed, thereby achieving precise control and linear regulation of the fluid flow rate.

[0027] Therefore, by having the valve core 30 have end face sealing portions 301 and side sealing portions 302 spaced apart from each other along the axial direction of the valve housing 10, the end face sealing portions 301 selectively open and close the valve port 40, and the side sealing portions 302 selectively open and close the valve port 40. In this way, during the axial movement of the valve core 30 driven by the valve stem 20, the side sealing portions 302 and the end face sealing portions 301 can sequentially contact or separate from the inner wall of the valve housing 10. This not only enables multi-stage opening and closing control of the valve port 40, but also allows for precise control of the fluid flow rate by adjusting the position of the side sealing portions 302. Thus, the switching function and the regulating function are integrated into one, simplifying the overall structure of the valve device 100 and improving the response speed and control accuracy of the valve device 100 to the fluid flow rate.

[0028] In some embodiments of the present invention, the valve device 100 includes a first interface 601, a second interface 602, and a third interface 603, and a first valve port 401 is disposed between the first interface 601 and the second interface 602, and a second valve port 402 is disposed between the second interface 602 and the third interface 603.

[0029] Combination Figure 1 , Figure 3 and Figure 20 As shown, the side sealing part 302 is a side sealing head. The side sealing head selectively extends into the valve port 40 and abuts against the inner side of the valve port 40 to selectively close the valve port 40. Specifically, during the axial movement of the valve core 30 along the valve body 10, when the side sealing head enters the predetermined position of the valve port 40, the outer peripheral surface of the side sealing head will form a tightly fitting sealing pair with the inner sidewall of the corresponding valve port 40. This can effectively block the fluid passage by using radial contact force to achieve fluid cutoff.

[0030] Combination Figure 1 , Figure 3 and Figure 20 As shown, the end face sealing part 301 is an end face sealing boss. The end face sealing boss protrudes outward from the side sealing head. The end face sealing boss selectively abuts against the outer end face of the valve port 40 to close the valve port 40. Specifically, during the axial movement of the valve core 30 along the valve body 10, when the end face sealing boss enters the predetermined position of the valve port 40, the end face sealing boss will form a tight sealing pair with the sealing end face at the corresponding valve port 40. In this way, the axial contact force can be used to effectively block the fluid passage and achieve fluid cutoff.

[0031] Furthermore, providing an additional end face seal in addition to the side seal can improve the overall sealing performance and safety redundancy of the valve device 100.

[0032] In some embodiments of the present invention, the inner sidewall of the valve housing 10 is provided with a mating boss, the side sealing part 302 is fitted with the side of the mating boss in the radial direction to achieve sealing, and the end face sealing part 301 is abutted with the end face of the mating boss in the axial direction to achieve sealing.

[0033] Combination Figure 20 As shown, the side sealing head is provided with flow guiding slopes 3021 on both sides of the valve body 10 along the axial direction. Specifically, when fluid passes through the side sealing head, the flow guiding slopes 3021 on both sides of the side sealing head along the axial direction of the valve body 10 can guide the fluid to smoothly turn and pass through, effectively reducing the local resistance loss when the fluid passes through the side sealing head, suppressing the generation of eddies and turbulence, and reducing the erosion of the side sealing head and valve body by high-speed fluid, thereby improving the flow efficiency of the valve device 100, reducing the operating noise of the valve device 100, and extending the service life of the valve device 100.

[0034] Combination Figure 1 , Figure 3 and Figure 20 As shown, the valve device 100 also includes an elastic element 50, which is connected between the valve housing 10 and the valve core 30. Specifically, one end of the elastic element 50 is connected to the valve housing 10, and the other end is connected to the valve core 30. When the valve core 30 does not move synchronously with the valve stem 20 or is not driven by the valve stem 20, the elastic element 50 is compressed. In this way, the restoring force of the elastic element 50 can be used to make the end face sealing part 301 of the valve core 30 tightly abut against the inner wall of the valve housing 10, thereby providing an axial sealing force to close the corresponding valve port 40.

[0035] In addition, the elastic element 50 can also provide a buffering effect during the movement of the valve core 30, making the movement of the valve core 30 more stable.

[0036] In some embodiments of the present invention, the elastic element 50 includes a first elastic element 501 and a second elastic element 502, wherein the first elastic element 501 is connected between the valve housing 10 and the first valve core 303, and the second elastic element 502 is connected between the valve housing 10 and the second valve core 304.

[0037] Combination Figure 1 , Figure 3 and Figure 4As shown, a sleeve 101 is provided inside the outer casing. The valve core 30 is movably disposed within the sleeve 101 and at least partially and selectively extends out of the sleeve 101. The inner diameter of the sleeve 101 is set as D1, and the outer diameter of the side sealing part 302 is set as D2. D1 and D2 satisfy the relationship: D1=D2. Specifically, the inner diameter D1 of the sleeve 101 is made equal to the outer diameter D2 of the side sealing part 302. This ensures that the side sealing part 302 of the valve core 30 can fit tightly against the inner wall of the valve housing 10, while reducing the overall radial dimension of the valve core 30. This reduces the effective area of ​​the valve core 30 subjected to differential pressure, reduces damage to the valve core 30 during movement, and extends the service life of the valve device 100. At the same time, the valve core 30 is movably disposed within the sleeve 101 and at least partially and selectively extends out of the sleeve 101. This allows the inner wall of the sleeve 101 to provide guidance for the valve core 30, making the movement of the valve core 30 more stable and accurate.

[0038] It should be noted that in some specific embodiments of the present invention, the inner diameter D1 of the sleeve 101 and the outer diameter D2 of the side sealing part 302 may not be completely equal due to the existence of errors or structural requirements.

[0039] Combination Figure 1 , Figure 3 , Figure 23 and Figure 24 As shown, there are two valve ports 40, namely a first valve port 401 and a second valve port 402. The first valve port 401 and the second valve port 402 are spaced apart in the axial direction of the valve housing 10. There are two valve cores 30, namely a first valve core 303 and a second valve core 304. The first valve core 303 has a first end face sealing part 3031 and a first side face sealing part 3032 that are spaced apart from each other. The first end face sealing part 3031 selectively opens and closes the first valve port 401, and the first side face sealing part 3032 selectively opens and closes the first valve port 401. The second valve core 304 has a second end face sealing part 3041 and a second side face sealing part 3042 that are spaced apart from each other. The second end face sealing part 3041 selectively opens and closes the second valve port 402, and the second side face sealing part 3042 selectively opens and closes the second valve port 402.

[0040] Specifically, the first valve core 303 and the second valve core 304 share the same valve stem 20, and elastic elements 50 are correspondingly provided between the first valve core 303 and the second valve core 304 and the valve housing 10. When the valve device 100 drives the first valve core 303 to move upward through the valve stem 20, the opening size of the first valve port 401 can be adjusted by adjusting the distance between the first valve core 303 and the first valve port 401. At this time, the second valve core 304 remains in contact with the inner side of the second valve port 402 under the action of the second elastic element 502, so that the second valve port 402 is in a closed state. In this way, the opening size of the first valve port 401 can be freely controlled without affecting the opening size of the second valve port 402.

[0041] Similarly, when the valve device 100 drives the second valve core 304 to move downward through the valve stem 20, the opening size of the second valve port 402 can be adjusted by adjusting the distance between the second valve core 304 and the second valve port 402. At this time, the first valve core 303 remains in contact with the inner side of the first valve port 401 under the action of the first elastic member 501, so that the first valve port 401 is in the closed state. In this way, the opening size of the second valve port 402 can be freely controlled without affecting the opening size of the first valve port 401.

[0042] Furthermore, when neither the first valve core 303 nor the second valve core 304 is driven by the valve stem 20, both the first valve core 303 and the second valve core 304 can be in a closed state only under the action of the corresponding elastic element 50.

[0043] Moreover, the end face sealing part 301 and the side sealing part 302 on each valve core 30 structure can enable the flow curve of the corresponding valve port 40 to meet the needs of more modes. This not only enables the switching of different flow channels, but also allows the flow rate of the fluid to be adjusted without affecting the flow rate of other flow channels. The structure is simple and reduces the cost of parts.

[0044] Combination Figure 1 and Figure 3 As shown, the valve stem 20 passes through one of the first valve core 303 and the second valve core 304 and is provided with a push block 201 at its end. The push block 201 is located between the first valve core 303 and the second valve core 304. The push block 201 selectively pushes the first valve core 303 or the second valve core 304 to move axially in the valve housing 10.

[0045] Specifically, in some embodiments of the present invention, the first valve core 303 is disposed above the second valve core 304, and the push block 201 is disposed at the end of the valve stem 20. After the valve stem 20 passes through the first valve core 303, the push block 201 at the end of the valve stem 20 can selectively abut against the second valve core 304. When the push block 201 separates from the first valve core 303 and abuts against the second valve core 304, the first valve core 303, under the action of the first elastic member 501, causes the first end face sealing portion 3031 to abut against the inner wall of the valve housing 10 in the axial direction. The push block 201 can change the axial position of the second valve core 304 by axial movement, thereby adjusting the opening size of the second valve port 402. When the push block 201 separates from the second valve core 304 and moves upward to abut against the first valve core 303, the second valve core 304, under the action of the second elastic member 502, causes the second end face sealing part 3041 to abut against the inner side wall of the valve body 10 in the axial direction. The push block 201 can change the axial position of the first valve core 303 by axial movement, thereby adjusting the opening size of the first valve port 401.

[0046] Furthermore, combined Figure 21 and Figure 22 As shown, by changing the axial dimension of the push block 201, the step size of the switching between the first valve core 303 and the second valve core 304 can be changed. If the axial dimension is further increased, the flow curves of the two sets of first valve core 303 and second valve core 304 can be made to overlap, that is, the push block 201 is always in contact with the first valve core 303 and the second valve core 304 at the same time. Therefore, the axial dimension of the push block 201 can be changed according to the requirements, thereby changing the degree of overlap of the two sets of flow curves of first valve core 303 and second valve core 304, and realizing the corresponding functional requirements, such as realizing the functions of fully opening and fully closing of the first valve core and the second valve core, as well as their independent or related flow control. It should be noted that when the axial dimension of the push block 201 increases to a certain size, it is impossible to simultaneously close the first valve port 401 and the second valve port 402 through the first end face sealing part 3031 and the second end face sealing part 3041. However, the simultaneous closure of the first valve port 401 and the second valve port 402 can be achieved through the second end face sealing part 3041 and the first side sealing part 3032.

[0047] In some embodiments of the present invention, there is a gap between the first valve core 303 and the valve stem 20 to balance the pressure difference inside and outside the sleeve 101 and reduce the driving force required for the valve stem 20.

[0048] In some embodiments of the present invention, the first valve core 303 and the second valve core 304 are provided with an internal central channel along the axial direction. The push block 201 is provided with a groove on each of its upper and lower sides along the axial direction. When the push block 201 contacts the first valve core 303 or the second valve core 304 and moves, the fluid flowing into the valve device 100 from the second interface 602 will flow into the internal central channel of the first valve core 303 or the second valve core 304 along the groove on the push block 201. This makes the pressure at the upper and lower ends of the first valve core 303 or the second valve core 304 remain balanced when it moves, thereby reducing the driving force required for the valve stem 20 and the wear of the components.

[0049] In some embodiments of the present invention, sealing elements such as sealing rings are provided between the mating surfaces of the first valve core 303 and the second valve core 304 and the corresponding sleeve 101, for isolating each working chamber in the valve device, so as to prevent the fluid flowing in from the interface of the valve device 100 from flowing into other chambers through the internal central channel and causing leakage when the first valve port 401 and the second valve port 402 are not opened.

[0050] Combination Figure 1 , Figure 3 and Figure 20 As shown, the valve housing 10 includes a main housing 102 and a valve seat 103. The valve seat 103 includes a main body section 1031 and an inclined section 1032. The main housing 102 is at least partially fitted on the outside of the main body section 1031. The inclined section 1032 is disposed at the end of the main body section 1031 and is inclined relative to the main body section 1031. An acute angle is formed between the inclined section 1032 and the main housing 102. The inclined section 1032 has a second valve port 402.

[0051] Specifically, the valve seat 103 can cooperate with the second valve core 304 to achieve a seal. An inclined section 1032 is provided at the end of the main body section 1031, and an acute angle is formed between the inclined section 1032 and the main housing 102. This not only reduces the contact area between the main housing 102 and the valve seat 103, reducing the assembly resistance between the main housing 102 and the valve seat 103, but also reduces the assembly difficulty during the assembly process of the valve seat 103 and the main housing 102 through the guiding effect of the inclined surface. Moreover, the inclined section 1032 can also guide the fluid flowing into the valve device 100 and prevent throttling at the inclined section 1032. This ensures that the upward movement of the valve seat 103 will not affect the flow of fluid at the second interface 602, thereby reducing the overall height of the valve device 100 and reducing the manufacturing cost of the valve device 100.

[0052] In some embodiments of the present invention, the main body segment 1031 and the inclined segment 1032 are integrally formed structural components.

[0053] Combination Figures 4-19As shown, in an embodiment of the present invention, during operation, the valve stem 20 reciprocates up and down along the axial direction, thereby driving the first valve core 303 and the second valve core 304 to also reciprocate up and down along the axial direction. (Setting) Figure 4 In the initial state of the valve device 100, the valve stem 20 is in contact with the second valve core 304 and is at its lowest point. At this time, the second valve port 402 is open and its opening degree is at its maximum. Under the pre-tightening force provided by the compressed first elastic element 501, the first end face sealing part 3031 of the first valve core 303 abuts against the end face of the inner wall of the valve housing 10, so that the first valve port 401 is closed. At this time, the first valve port 401 is closed, and the second valve port 402 is open and at its maximum opening degree. Figure 5 The leftmost point of the curve.

[0054] Furthermore, such as Figures 4-7 As shown, the valve stem 20 moves upward, and the second elastic element 502 is compressed between the second valve core 304 and the valve seat 103. The preload force exerted by the second elastic element 502 on the second valve core 304 will push the second valve core 304, so that as the valve stem 20 gradually moves upward, the second valve core 304 tightly adheres to the pushing block 201 of the valve stem 20 and moves upward. At this time, as the distance 'a' between the second valve core 304 and the second valve port 402 gradually decreases, the opening of the second valve port 402 gradually decreases. In this state, the opening of the second valve port 402 can be precisely controlled by controlling the axial position of the valve stem 20. The valve stem 20 continues to move upward until the second valve port 402 is closed. At this time, the second side sealing part 3042 of the second valve core 304 adheres to the inner wall of the valve housing 10 to seal the second valve port 402. The sealing position of the inner wall of the valve housing 10 can be sealed by a sealing ring or other sealing methods.

[0055] Furthermore, such as Figure 8 and Figure 9 As shown, the valve stem 20 continues to move upward. When the second side sealing part 3042 of the second valve core 304 is no longer in contact with the inner wall of the valve housing 10, the second valve port 402 opens and the opening gradually increases. At this time, the throttling area of ​​the second valve port 402 depends on the area with the smaller opening. The throttling area in the first half is related to the annular area formed by distance b, and the opening gradually increases. When the annular area formed by b and the annular area formed by distance c are equal, the throttling area is related to the annular area formed by distance c. During this process, distance c remains unchanged, that is, the throttling area remains unchanged, and distance d gradually decreases. When the annular area formed by distance d and the annular area formed by distance c are equal, the throttling area depends on the annular area where distance d is located and continues to decrease until distance d is zero. That is, the corresponding flow rate first increases, then remains constant, and then decreases to zero. At this time, the second valve core 304 and the second valve port 402 are in contact again. Figure 10 and Figure 11 As shown.

[0056] Furthermore, such as Figure 12 and Figure 13 As shown, the valve stem 20 continues to move upward. Since the first valve core 303 and the second valve core 304 are both subjected to the pre-tightening force of the elastic element 50 and the limiting effect at the first valve port 401 and the second valve port 402, the movement of the valve stem 20 will not cause any valve core 30 to move. During this process, both valve ports 40 are in the closed state, and the flow curve is 0.

[0057] Furthermore, such as Figure 14 and Figure 16 As shown, the valve stem 20 continues to move upward. When the push block 201 contacts the first valve core 303, it will drive the first valve core 303 to overcome the preload of the first elastic element 501 and move upward together, causing the first valve port 401 to open. At this time, the second valve port 402 is in the closed state. The first valve port 401 gradually opens. The throttling area at this time is similarly related to the section with smaller distance between the two ends. The throttling area of ​​the first half is related to the annular area formed by distance e, and the opening gradually increases. When the annular area formed by distance e and the annular area formed by distance f are equal, the throttling area is related to the annular area formed by distance f. During this process, distance f remains unchanged, that is, the throttling area remains unchanged. Distance g gradually decreases. When the annular area formed by distance g and the annular area formed by distance f are equal, the throttling area depends on the annular area where distance g is located and continues to decrease until the first valve port 401 is closed. At this time, the first side sealing part 3032 of the first valve core 303 is attached to the inner wall of the valve body 10 to seal the first valve port 401. Figure 15 and Figure 17 As shown, the corresponding curve also increases first, then remains constant, and then decreases to zero.

[0058] Furthermore, such as Figure 18 and Figure 19 As shown, the valve stem 20 continues to move upward, causing the first valve core 303 to continue to move upward. When the first side sealing part 3032 of the first valve core 303 is no longer in contact with the inner wall of the valve body 10, the first valve port 401 opens again and the opening degree gradually increases.

[0059] Thus, by controlling the different positions of the valve stem 20 in the axial direction, flow control of different valve ports 40 can be achieved.

[0060] Combination Figure 1 and Figure 3As shown, the valve device 100 also includes a drive device 70, which includes a rotor assembly 701, a nut assembly 702, and a screw assembly 703. The nut assembly 702 is fixedly disposed relative to the valve housing 10. The screw assembly 703 is screwed to the nut assembly 702. The rotor assembly 701 is driven to be connected to the screw assembly 703 and drives the screw assembly 703 to rotate relative to the nut assembly 702. The upper end of the valve stem 20 cooperates with the screw assembly 703. The axial movement of the screw assembly 703 drives the valve stem 20 to move axially. The valve stem 20 further drives the first valve core 303 and / or the second valve core 304 to move axially, thereby realizing the adjustment of the opening size of the first valve port 401 and the second valve port 402.

[0061] The vehicle according to the present invention may mainly include: the valve device 100 described above.

[0062] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0063] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0064] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A valve device, characterized in that, include: Valve housing (10), wherein a valve port (40) is provided inside the valve housing (10); Valve stem (20), which is disposed within the valve housing (10) and selectively reciprocates along the axial direction of the valve housing (10); The valve core (30) is disposed inside the valve housing (10) and is in drive cooperation with the valve stem (20). The valve core (30) has an end face sealing portion (301) and a side sealing portion (302) spaced apart from each other along the axial direction of the valve housing (10). The end face sealing portion (301) selectively opens and closes the valve port (40), and the side sealing portion (302) selectively opens and closes the valve port (40).

2. The valve device according to claim 1, characterized in that, The side sealing part (302) is a side sealing head, which selectively extends into the valve port (40) and abuts against the inner side of the valve port (40) to selectively close the valve port (40).

3. The valve device according to claim 2, characterized in that, The end face sealing part (301) is an end face sealing boss. The end face sealing boss protrudes outward relative to the side sealing head. The end face sealing boss selectively abuts against the outer end face of the valve port (40) to close the valve port (40).

4. The valve device according to claim 2, characterized in that, The side sealing head is provided with flow guiding slopes (3021) on both sides along the axial direction of the valve body (10).

5. The valve device according to claim 1, characterized in that, It also includes an elastic element (50) connected between the valve housing (10) and the valve core (30).

6. The valve device according to claim 1, characterized in that, A sleeve (101) is provided inside the valve housing (10). The valve core (30) is movably disposed inside the sleeve (101) and extends at least partially and selectively from the sleeve (101). The inner diameter of the sleeve (101) is set as D1, and the outer diameter of the side sealing part (302) is set as D2. D1 and D2 satisfy the relationship: D1=D2.

7. The valve device according to claim 1, characterized in that, The valve ports (40) are two in number, namely a first valve port (401) and a second valve port (402). The first valve port (401) and the second valve port (402) are spaced apart in the axial direction of the valve housing (10). The valve cores (30) are two in number, namely a first valve core (303) and a second valve core (304). The first valve core (303) has a first end face sealing part (3031) and a first side face sealing part (3032) spaced apart from each other. The first end face sealing part (3031) selectively opens and closes the first valve port (401), and the first side face sealing part (3032) selectively opens and closes the first valve port (401). The second valve core (304) has a second end face sealing portion (3041) and a second side face sealing portion (3042) spaced apart from each other. The second end face sealing portion (3041) selectively opens and closes the second valve port (402), and the second side face sealing portion (3042) selectively opens and closes the second valve port (402).

8. The valve device according to claim 7, characterized in that, The valve stem (20) passes through one of the first valve core (303) and the second valve core (304) and has a push block (201) at its end. The push block (201) is located between the first valve core (303) and the second valve core (304). The push block (201) selectively pushes the first valve core (303) or the second valve core (304) to move axially in the valve housing (10).

9. The valve device according to claim 7, characterized in that, The valve housing (10) includes a main housing (102) and a valve seat (103). The valve seat (103) includes a main body section (1031) and an inclined section (1032). The main housing (102) is at least partially fitted on the outside of the main body section (1031). The inclined section (1032) is disposed at the end of the main body section (1031) and is inclined relative to the main body section (1031). An acute angle is formed between the inclined section (1032) and the main housing (102). The inclined section (1032) has a second valve port (402).

10. A vehicle, characterized in that, include: The valve device according to any one of claims 1-9.

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