Two-position three-way valve

Abstract

The utility model discloses a two-position three-way valve which comprises a shell, a first valve element and a second valve element, the shell comprises a lower shell, a first cavity is formed in the lower shell, an anti-rotation groove is formed in the inner wall of the first cavity, and the anti-rotation groove extends in the axial direction of the shell; the valve element is arranged in the first cavity and can move in the axial direction of the shell, and an anti-rotation convex lug matched with the anti-rotation groove is arranged on the peripheral wall of the valve element. According to the two-position three-way valve, the anti-rotation groove is formed in the inner wall of the first cavity and extends in the axial direction of the shell, the valve element is arranged in the first cavity and can move in the axial direction of the shell, and the anti-rotation convex lug matched with the anti-rotation groove is arranged on the peripheral wall of the valve element, so that the valve element can be prevented from rotating relative to the lower shell; the situation that the valve element is stuck in the rotating process is avoided, it is guaranteed that the valve element can move in the axial direction of the shell, and therefore the two-position three-way valve is prevented from losing efficacy, the reliability and stability of the two-position three-way valve are guaranteed, and the service life of the two-position three-way valve is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigerant control elements, in particular to a two-position three-way valve. Background Art

[0002] With the rapid development of the automotive industry, vehicles are increasingly equipped with more devices and functions. Valves, as the medium connecting multiple flow paths, are becoming increasingly important in the automotive manufacturing process. Existing two-position, three-way valves often suffer from problems with the fit between the valve seat and the valve core, resulting in low reliability and prone to failure. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a two-position, three-way valve that prevents the valve core from rotating relative to the lower housing, ensuring that the valve core can move axially along the housing, thus preventing failure of the two-position, three-way valve, ensuring reliability and stability, and extending service life.

[0004] According to an embodiment of the present utility model, a two-position three-way valve includes: a shell, the shell includes a lower shell, the lower shell has a first cavity, the inner wall of the first cavity has an anti-rotation groove, and the anti-rotation groove extends along the axial direction of the shell; a valve core, the valve core is arranged in the first cavity and is movable along the axial direction of the shell, and the outer peripheral wall of the valve core has an anti-rotation lug that cooperates with the anti-rotation groove.

[0005] The cam is secured in place and has an axial stop that prevents the valve from rotating relative to the lower housing, thereby preventing the valve from becoming stuck during rotation and ensuring that the valve is movable along the axial direction of the housing. This prevents failure of the two-position three-way valve, ensures the reliability and stability of the two-position three-way valve, and extends the service life of the two-position three-way valve.

[0006] In addition, the two-position three-way valve according to the present invention may also have the following additional technical features:

[0007] In some embodiments, the anti-rotation lugs are multiple and spaced apart along the circumferential direction of the valve core, and the anti-rotation grooves are multiple and correspond one-to-one to the multiple anti-rotation lugs.

[0008] In some embodiments, the shell further includes an upper shell, the upper shell and the lower shell are arranged and connected along the axial direction of the shell, the upper shell has a second cavity, and the two-position three-way valve further includes: a drive assembly, at least part of which is disposed in the second cavity and connected to the valve core, for driving the valve core to move along the axial direction of the shell.

[0009] In some embodiments, a step portion is provided on the inner peripheral wall of the first cavity, and the end surface of the anti-rotation lug facing away from the upper shell is suitable for abutting against the step portion.

[0010] In some embodiments, an annular protrusion extending along the circumferential direction of the valve core is provided on the outer peripheral wall of the valve core, the anti-rotation lug is provided on the outer peripheral wall of the annular protrusion, and the end surface of the annular protrusion facing away from the upper shell is suitable for abutting against the step portion.

[0011] In some embodiments, a protrusion is provided on the end surface of the valve core facing the upper shell, and the protrusion is suitable for abutting against the end surface of the upper shell facing the lower shell.

[0012] In some embodiments, the valve core has a balancing flow channel extending along the axial direction of the shell, and both ends of the balancing flow channel along the axial direction of the shell are open. The drive assembly includes a screw, which extends along the axial direction of the shell. The screw has a mating section, which is inserted into the balancing flow channel and is threadedly connected to the balancing flow channel. Along the length direction of the screw, the cross-section of the mating section is arched or open ring-shaped.

[0013] In some embodiments, the first cavity includes a first sub-cavity and a second sub-cavity, and the first sub-cavity and the second sub-cavity are arranged along the axial direction of the shell, and the lower shell has a connecting hole, a first valve port and a second valve port connected to the first sub-cavity, and the connecting hole is arranged on the peripheral wall of the lower shell, and the first valve port and the second valve port are respectively arranged at the axial ends of the first sub-cavity, and the anti-rotation groove is arranged on the inner wall of the second sub-cavity. The valve core has a sealing section and a guide section, and the sealing section extends into the first sub-cavity through the first valve port to block the first valve port or the second valve port. The guide section is located on the side of the sealing section away from the second valve port and is arranged in the second sub-cavity, and the anti-rotation lug is arranged on the outer peripheral wall of the guide section.

[0014] In some embodiments, a first sealing ring is provided on the sealing section. When the sealing section blocks the first valve port, the first sealing ring is located between the sealing section and the inner circumferential wall of the first valve port. When the sealing section blocks the second valve port, the first sealing ring is located between the sealing section and the inner circumferential wall of the second valve port; and / or, a second sealing ring is provided between the inner circumferential wall of the second sub-cavity and the outer circumferential wall of the guide section.

[0015] In some embodiments, the outer diameter of the guide section is S1, the outer diameter of the sealing section is S2, and the following conditions are satisfied: S1=S2; and / or, a plurality of third sealing rings are provided on the outer sleeve of the lower shell body, and the plurality of third sealing rings are spaced apart in the axial direction of the shell body. In the direction from the first valve port to the second valve port, the outer diameter of the lower shell body gradually decreases, and the outer diameters of the plurality of third sealing rings gradually decrease.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 This is a right side view of a two-position three-way valve according to an embodiment of the present utility model;

[0019] Figure 2 is a cross-sectional view of a two-position three-way valve according to an embodiment of the present utility model;

[0020] Figure 3 This is a cross-sectional view of the housing and part of the drive assembly of a two-position three-way valve according to an embodiment of the present utility model;

[0021] Figure 4 1 is a perspective view of a valve core of a two-position three-way valve according to an embodiment of the present utility model;

[0022] Figure 5 This is a front view of a valve core of a two-position three-way valve according to an embodiment of the present utility model;

[0023] Figure 6 1 is a cross-sectional view of a valve core of a two-position three-way valve according to an embodiment of the present utility model;

[0024] Figure 7 It is a three-dimensional diagram of a screw of a two-position three-way valve according to an embodiment of the present utility model.

[0025] Reference numerals:

[0026] 100. Two-position three-way valve;

[0027] 1. Housing; 11. Lower housing; 111. Anti-rotation groove; 112. Step; 113. Communication hole; 114. First valve port; 115. Second valve port; 116. Second communication hole; 117. Guide; 12. Upper housing; 121. Sleeve; 122. Bearing seat; 13. First cavity; 131. First sub-cavity; 132. Second sub-cavity; 133. Third sub-cavity; 134. Fourth sub-cavity; 14. Second cavity; 15. Third sealing ring; 151. First sub-sealing ring; 152. Second sub-sealing ring; 153. Third sub-sealing ring;

[0028] 2. Valve core; 21. Sealing section; 211. First sealing ring; 212. Groove; 22. Guide section; 221. Anti-rotation lug; 222. Annular protrusion; 223. Protrusion; 224. Second sealing ring; 23. Connecting section; 24. Balancing channel;

[0029] 3. Drive assembly; 31. Screw; 311. Matching section; 32. Coil component; 33. Rotor component; 34. Bearing; 35. Guide. DETAILED DESCRIPTION

[0030] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to 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 invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0033] In this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0034] The following describes a two-position three-way valve 100 according to an embodiment of the present invention with reference to the accompanying drawings.

[0035] like Figure 2 As shown, the two-position three-way valve 100 according to the embodiment of the present invention includes a housing 1 and a valve core 2 .

[0036] Specifically, refer to the attached Figure 1 and attached Figure 2 As shown, the housing 1 can protect the internal structure of the two-position three-way valve 100, which is beneficial to prolonging the service life of the two-position three-way valve 100. The housing 1 includes a lower housing 11, and the lower housing 11 has a first cavity 13. The inner wall of the first cavity 13 has an anti-rotation groove 111. The anti-rotation groove 111 is along the axial direction of the housing 1 (refer to the attached Figure 2 The valve core 2 is arranged in the first cavity 13 and is movable along the axial direction of the shell 1. The outer peripheral wall of the valve core 2 is provided with an anti-rotation lug 221 that cooperates with the anti-rotation groove 111. The valve core 2 is movable along the axial direction of the shell 1 to adjust the position of the valve core 2 in the first cavity 13, thereby realizing flow regulation and distribution, realizing rich flow path change functions of the two-position three-way valve 100, and setting custom modes to meet different needs of users and improve user experience.

[0037] It can be understood that by providing an anti-rotation lug 221 on the outer peripheral wall of the valve core 2, the anti-rotation lug 221 cooperates with the anti-rotation groove 111 on the inner wall of the first cavity 13, so as to prevent the valve core 2 from rotating relative to the lower shell 11, thereby ensuring that the valve core 2 can only move along the axial direction of the shell 1 and cannot rotate, preventing the valve core 2 from getting stuck during the rotation process, and preventing the valve core 2 from not moving along the axial direction of the shell 1 due to rotation, thereby avoiding failure of the two-position three-way valve 100, ensuring the reliability and stability of the two-position three-way valve 100, and extending the service life of the two-position three-way valve 100.

[0038] Existing new energy systems typically use electromagnetic stop valves or three-way electric ball valves to switch refrigerant flow paths. When using electromagnetic stop valves, two are often required. These valves typically consist of a coil (solenoid) and an armature valve core. The valve controls the armature's engagement and disengagement by switching the coil, thereby blocking and opening the valve port. This allows one to open and the other to close, or vice versa, switching the refrigerant flow path. However, due to the inherent characteristics of electromagnetic stop valves, two valves must be used in combination to achieve flow switching, limiting their application scenarios and posing challenges such as large layout space and heavy weight.

[0039] When using a three-way electric ball valve, it typically consists of a driver, a reduction gear, a transmission mechanism, and a ball valve. The driver (stepper motor)'s stator coil receives pulse signals from a controller to drive the rotor's magnetic ring for rotation. The reduction gear amplifies the torque, and the transmission mechanism transmits the force to the ball valve, thereby rotating the valve core and switching between refrigerant flow paths. However, in highly integrated products, existing electric ball valves require a large torque to operate properly due to structural limitations inherent in the valve itself. As the valve port size increases, the required driving torque also increases, requiring a larger drive coil or a larger reduction ratio, significantly increasing the cost. The built-in reduction gear is often a planetary gear set composed of micro-gears. Large-diameter ball valves require high torque to rotate, which increases the lifespan and reliability of the micro-gears. The ball valve's inherently straight flow path is linear, making linear flow control impossible. The ball valve itself is large and heavy, making it difficult to install and use in the vehicle.

[0040] Compared with the electromagnetic stop valve and three-way electric ball valve used in the prior art, the two-position three-way valve 100 of the utility model does not need to be used in combination, can relatively reduce the occupied space, reduce the weight, realize the miniaturization and lightweight of the two-position three-way valve 100, reduce production costs, expand the use scenarios of the two-position three-way valve 100, and facilitate the assembly of the two-position three-way valve 100.

[0041] According to the two-position three-way valve 100 of the embodiment of the present invention, an anti-rotation groove 111 is provided on the inner wall of the first cavity 13, and the anti-rotation groove 111 extends along the axial direction of the shell 1. The valve core 2 is arranged in the first cavity 13 and is movable along the axial direction of the shell 1. The outer peripheral wall of the valve core 2 is provided with an anti-rotation lug 221 that cooperates with the anti-rotation groove 111, which can prevent the valve core 2 from rotating relative to the lower shell 11, avoid the valve core 2 from getting stuck during the rotation process, and ensure that the valve core 2 can move along the axial direction of the shell 1, thereby avoiding failure of the two-position three-way valve 100, ensuring the reliability and stability of the two-position three-way valve 100, and extending the service life of the two-position three-way valve 100.

[0042] In some embodiments of the present invention, Figure 3 and attached Figure 4 As shown, there are multiple anti-rotation lugs 221 spaced apart along the circumference of the valve core 2, and multiple anti-rotation grooves 111 corresponding one-to-one to the multiple anti-rotation lugs 221. The valve core 2 can be limited at multiple locations spaced apart along the circumference of the valve core 2, preventing the valve core 2 from rotating relative to the lower housing 11 and ensuring that the valve core 2 can move axially along the housing 1, thereby preventing failure of the two-position three-way valve 100, ensuring the reliability and stability of the two-position three-way valve 100, and extending the service life of the two-position three-way valve 100. For example, there can be two, three, four, five, or six anti-rotation lugs 221 spaced apart along the circumference of the valve core 2, and there can be two, three, four, five, or six anti-rotation grooves 111 corresponding one-to-one to the multiple anti-rotation lugs 221.

[0043] In a specific example, see the attached Figure 2 and attached Figure 4 As shown, the anti-rotation lugs 221 are two spaced apart along the circumferential direction of the valve core 2, and the two anti-rotation lugs 221 are located on opposite sides of the valve core 2. The anti-rotation grooves 111 are two one-to-one corresponding to the two anti-rotation lugs 221, which can limit the valve core 2 from two places spaced apart in the circumferential direction of the valve core 2, further preventing the valve core 2 from rotating relative to the lower shell 11, ensuring that the valve core 2 can move along the axial direction of the shell 1, avoiding failure of the two-position three-way valve 100, ensuring the reliability and stability of the two-position three-way valve 100, and extending the service life of the two-position three-way valve 100.

[0044] In some embodiments of the present invention, Figure 2 and attached Figure 3 As shown, the shell 1 also includes an upper shell 12, which is arranged and connected to the lower shell 11 along the axial direction of the shell 1, and the upper shell 12 has a second cavity 14. The two-position three-way valve 100 also includes a drive assembly 3, at least part of which is arranged in the second cavity 14 and connected to the valve core 2, and is used to drive the valve core 2 to move along the axial direction of the shell 1. Under the drive of the drive assembly 3, the valve core 2 is movable along the axial direction of the shell 1 to adjust the position of the valve core 2 in the first cavity 13 to achieve flow regulation and distribution, thereby realizing rich flow channel change functions of the two-position three-way valve 100, and custom modes can be set to meet different needs of users and improve user experience.

[0045] It should be noted that, refer to the attached Figure 2 and attached Figure 3As shown, the upper shell 12 includes a sleeve 121 and a bearing seat 122 arranged and connected along the axial direction of the shell 1. The bearing seat 122 is located on the side of the sleeve 121 facing the lower shell 11. The bearing seat 122 is welded to the lower shell 11. By designing the bearing seat 122 and the lower shell 11 as separate parts, the production and processing of the anti-rotation groove 111 of the lower shell 11 can be facilitated, thereby reducing the difficulty of production and processing of the shell 1. In addition, since an anti-rotation groove 111 is provided on the inner wall of the first cavity 13, the anti-rotation groove 111 is located at the end of the lower shell 11 facing the bearing seat 122, and the end of the anti-rotation groove 111 facing the bearing seat 122 is open, and the outer peripheral wall of the valve core 2 is provided with an anti-rotation lug 221 that cooperates with the anti-rotation groove 111, the valve core 2 can be first installed into the first cavity 13 from the end of the lower shell 11 facing the upper shell 12, and then the bearing seat 122 is connected to the lower shell 11, which facilitates the installation of the valve core 2 into the first cavity 13 and ensures the normal assembly of the two-position three-way valve 100.

[0046] In a further embodiment of the present invention, refer to the attached Figure 2 As shown, combined with reference Figure 3 and Figure 6 The inner peripheral wall of the first cavity 13 is provided with a step portion 112, and the end surface of the anti-rotation lug 221 facing away from the upper shell body 12 is suitable for abutting against the step portion 112. The setting of the step portion 112 can limit the valve core 2. When the end surface of the anti-rotation lug 221 facing away from the upper shell body 12 abuts against the step portion 112, the cooperation between the anti-rotation lug 221 and the step portion 112 can limit the valve core 2 from continuing to move in the direction away from the upper shell body 12, thereby preventing the valve core 2 from escaping from the first cavity 13, thereby ensuring the effectiveness and reliability of the two-position three-way valve 100.

[0047] In a further embodiment of the present invention, referring to the attached Figure 4 As shown, combined with reference Figure 3 The outer peripheral wall of the valve core 2 is provided with an annular protrusion 222 extending along the circumferential direction of the valve core 2, and the anti-rotation lug 221 is provided on the outer peripheral wall of the annular protrusion 222. The end surface of the annular protrusion 222 facing away from the upper shell body 12 is suitable for abutting against the step portion 112. The setting of the annular protrusion 222 can strengthen the structural strength of the anti-rotation lug 221, ensure the cooperation between the anti-rotation lug 221 and the anti-rotation groove 111, and can increase the abutment area between the valve core 2 and the step portion 112, thereby ensuring the effectiveness of the step portion 112 in limiting the valve core 2, further preventing the valve core 2 from continuing to move in the direction away from the upper shell body 12, and preventing the valve core 2 from escaping from the first cavity 13, thereby ensuring the effectiveness and reliability of the two-position three-way valve 100.

[0048] In a further embodiment of the present invention, refer to the attached Figure 4 and attached Figure 5 As shown, combined with the reference Figure 2A protrusion 223 is provided on the end surface of the valve core 2 facing the upper shell 12, and the protrusion 223 is suitable for abutting against the end surface of the upper shell 12 facing the lower shell 11. When the protrusion 223 abuts against the end surface of the upper shell 12 facing the lower shell 11, the valve core 2 stops moving toward the upper shell 12, thereby limiting the valve core 2 and restricting the valve core 2 from continuing to move toward the direction close to the upper shell 12, thereby preventing the valve core 2 from escaping from the first cavity 13, and ensuring the effectiveness and reliability of the two-position three-way valve 100. It can be understood that by providing a protrusion 223 on the end face of the valve core 2 facing the upper shell 12, the protrusion 223 can be offset against the end face of the upper shell 12 facing the lower shell 11, but the rest of the valve core 2 will not contact the end face of the upper shell 12 facing the lower shell 11, which can reduce the contact area between the valve core 2 and the upper shell 12, reduce the friction between the valve core 2 and the upper shell 12, ensure the reliability and stability of the valve core 2 and the shell 1, and extend the service life of the two-position three-way valve 100.

[0049] It should be noted that the protrusion 223 can be an annular or open annular shape extending along the circumferential direction of the valve core 2, or can be a plurality of small protrusions on the end surface of the valve core 2 facing the upper shell 12, which is not limited here. Figure 4 As shown, the protrusion 223 is arranged on the end face of the annular protrusion 222 facing the upper shell 12, and the protrusion 223 is a ring extending along the circumferential direction of the valve core 2. The annular protrusion 223 can reduce the contact area between the valve core 2 and the upper shell 12 while ensuring the symmetry of the relative two sides of the protrusion 223 in the radial direction as much as possible, thereby ensuring the protrusion 223 and the end face of the upper shell 12 facing the lower shell 11. It avoids uneven force in the circumferential direction of the valve core 2, ensures the effective cooperation between the valve core 2 and the shell 1, and ensures the stability of the two-position three-way valve 100.

[0050] In some embodiments of the present invention, Figure 2 and attached Figure 3 As shown, the first cavity 13 includes a first sub-cavity 131 and a second sub-cavity 132, and the first sub-cavity 131 and the second sub-cavity 132 are arranged along the axial direction of the shell 1. A second sealing ring 224 is provided between the inner peripheral wall of the second sub-cavity 132 and the outer peripheral wall of the valve core 2. The setting of the second sealing ring 224 can separate the second sub-cavity 132 into a third sub-cavity 133 and a fourth sub-cavity 134 arranged in the axial direction of the shell 1. The third sub-cavity 133 is always connected to the second cavity 14, and the fourth sub-cavity 134 is located on the side of the third sub-cavity 133 facing the second valve port 115.

[0051] In a further embodiment of the present invention, refer to the attached Figure 2 and attached Figure 6As shown, the valve core 2 has a balancing flow channel 24 extending axially along the housing 1. Both ends of the balancing flow channel 24 along the axial direction of the housing 1 are open. The medium enters the balancing flow channel 24 from the end facing away from the upper housing 12 and flows along the balancing flow channel 24 to the third sub-cavity 133. Specifically, the bearing seat 122 is provided with a balancing hole extending axially through the housing 1. The medium can flow from the third sub-cavity 133 to the second cavity 14 through the balancing hole. This ensures that the air pressure in the second cavity 14 and the air pressure in the third sub-cavity 133 are consistent with the air pressure on the side of the valve core 2 facing away from the second cavity 14. This ensures that the pressure is always balanced during the switching process of the valve core 2, avoiding affecting the normal movement of the valve core 2 along the axial direction of the housing 1. For example, the medium can be a refrigerant.

[0052] Further, refer to the attached Figure 2 and attached Figure 7 As shown, the drive assembly 3 includes a screw 31, which extends along the axial direction of the housing 1. The screw 31 has a matching section 311, which is arranged in the balance flow channel 24 and is threadedly connected to the balance flow channel 24. Figure 2 (See direction a shown in the figure), the cross-section of the mating section 311 is arched or open annular, allowing a certain gap between the mating section 311 and the inner circumferential wall of the balancing flow channel 24 to allow the medium in the balancing flow channel 24 to flow to the third sub-cavity 133. This further ensures that the air pressure in the second cavity 14 and the air pressure in the third sub-cavity 133 are consistent with the air pressure on the side of the valve core 2 facing away from the second cavity 14, ensuring that the valve core 2 is always in a pressure balance state during the switching process, thereby avoiding affecting the normal movement of the valve core 2 along the axial direction of the housing 1. It should be noted that the open annular structure refers to an annular structure that is not completely closed.

[0053] Further, see the attached Figure 2 As shown, the drive assembly 3 also includes a coil component 32, a rotor component 33, a bearing 34 and a guide member 35. The coil component 32 is sleeved outside the sleeve 121, and the rotor component 33 is arranged inside the sleeve 121. The coil component 32 and the rotor component 33 are arranged opposite to each other. The coil component 32 is used to drive the rotor component 33 to rotate. The guide member 35 is fixed in the rotor component 33. The screw 31 is inserted into the guide member 35 and the length direction (refer to the attached Figure 2 One end of the screw 31 (in the direction a shown in the figure) is welded to the guide member 35, so that the rotor component 33, the guide member 35 and the screw 31 rotate synchronously to prevent the screw 31 from deflecting during the rotation process. The end of the screw 31 away from the guide member 35 is threadedly connected to the valve core 2. The bearing 34 is provided on the bearing seat 122 and is located between the outer peripheral wall of the screw 31 and the inner peripheral wall of the bearing seat 122 to ensure the normal rotation of the screw 31.

[0054] It is understandable that if Figure 2As shown, when the coil component 32 is energized, the coil component 32 drives the rotor component 33 to rotate. Since the screw 31 is fixedly connected to the rotor component 33, the rotor component 33 drives the screw 31 to rotate together. The screw 31 and the valve core 2 are threaded together to form a thread pair. However, the valve core 2 cannot rotate with the screw 31 due to the presence of the anti-rotation lug 221, so that the valve core 2 can only move along the axial direction of the housing 1 according to the threaded fit and cannot rotate.

[0055] Since the screw 31 is fixedly connected to the rotor component 33, the rotor component 33 drives the screw 31 to rotate together, and the screw 31 and the valve core 2 are threadedly matched to form a thread pair. The valve core 2 cannot rotate with the screw 31 due to the presence of the anti-rotation lug 221, so that the valve core 2 can only move along the axial direction of the housing 1 according to the thread match and cannot rotate, preventing the valve core 2 from being stuck due to excessive friction between the threads, avoiding the valve core 2 and the screw 31 from rotating in place without achieving axial displacement, and avoiding failure of the two-position three-way valve 100.

[0056] It should be noted that, in the prior art, the valve core is often limited by the cooperation of a slip ring and a spring, and the rotor component needs to move along the axial direction of the shell while rotating. The utility model can achieve the limiting effect on the valve core 2 by abutting against the end face of the upper shell 12 facing the lower shell 11 by the protrusion 223, so that the rotor component 33 does not need to move along the axial direction of the shell 1, so there is no need to leave space in the shell 1 for the rotor component 33 to move along the axial direction of the shell 1, thereby reducing the overall height of the two-position three-way valve 100, which is conducive to the miniaturization of the two-position three-way valve 100. In addition, because the design of the slip ring and the spring is eliminated, the noise problem caused by the slip ring on the spring stop is solved, the noise of the two-position three-way valve 100 during use is reduced, and the problem of the spring being broken due to excessive force is avoided, thereby relatively extending the service life of the two-position three-way valve 100.

[0057] In some embodiments of the present invention, Figure 2 and attached Figure 3As shown, the first cavity 13 includes a first sub-cavity 131 and a second sub-cavity 132, which are arranged along the axial direction of the shell 1, and the lower shell 11 has a communicating hole 113, a first valve port 114 and a second valve port 115 connected to the first sub-cavity 131. The communicating hole 113 is provided on the peripheral wall of the lower shell 11, and the first valve port 114 and the second valve port 115 are respectively provided at the axial ends of the first sub-cavity 131. The anti-rotation groove 111 is provided on the inner wall of the second sub-cavity 132. The valve core 2 has a sealing section 21 and a guide section 22. The sealing section 21 extends into the first sub-cavity 131 through the first valve port 114 to block the first valve port 114 or the second valve port 115. The guide section 22 is located on the side of the sealing section 21 away from the second valve port 115 and is provided in the second sub-cavity 132. The anti-rotation lug 221 is provided on the outer peripheral wall of the guide section 22.

[0058] It is understandable that, under the drive of the drive assembly 3, the valve core 2 can move along the axial direction of the housing 1. When the sealing section 21 blocks the first valve port 114, as shown in FIG. Figure 2 As shown, the communicating hole 113 and the second valve port 115 are connected, and the medium flows from one of the communicating hole 113 and the second valve port 115 into the first sub-cavity 131, and flows from the first sub-cavity 131 to the other of the communicating hole 113 and the second valve port 115; when the sealing section 21 blocks the second valve port 115, the communicating hole 113 and the first valve port 114 are connected, and the medium flows from one of the communicating hole 113 and the first valve port 114 into the first sub-cavity 131, and flows from the first sub-cavity 131 to the communicating hole 113 and the first valve port 115. 4; when the sealing section 21 blocks neither the first valve port 114 nor the second valve port 115, the communicating hole 113, the first valve port 114 and the second valve port 115 are connected to each other, and the position of the sealing section 21 in the first sub-cavity 131 can be adjusted to change the opening of the first valve port 114 and the second valve port 115, thereby realizing flow regulation and distribution, thereby realizing rich flow channel change functions of the two-position three-way valve 100, and setting custom modes to meet different needs of users and improve user experience.

[0059] It should be noted that, refer to the attached Figure 2 and attached Figure 3As shown, the lower shell 11 also has a second communicating hole 116, which is provided on the peripheral wall of the lower shell 11. The second communicating hole 116 is located on the side of the first communicating hole 113 close to the upper shell 12 and on the side of the guide section 22 facing the second valve port 115. The second communicating hole 116 is connected to the fourth sub-cavity 134 of the second sub-cavity 132. When the sealing section 21 does not block the first valve port 114, the second communicating hole 116, the communicating hole 113 and the first valve port 114 are connected to each other. The medium can flow into the first sub-cavity 131 from the communicating hole 113, enter the fourth sub-cavity 134 through the first valve port 114, and finally flow out from the second communicating hole 116; the medium can also flow into the fourth sub-cavity 134 from the second communicating hole 116, enter the first sub-cavity 131 through the first valve port 114, and finally flow out from the communicating hole 113.

[0060] In a further embodiment of the present invention, refer to the attached Figure 2 and attached Figure 4 As shown, a first sealing ring 211 is sleeved on the sealing section 21. When the sealing section 21 blocks the first valve port 114, the first sealing ring 211 is located between the sealing section 21 and the inner peripheral wall of the first valve port 114, which can prevent the medium from flowing out of the first valve port 114 through the gap between the sealing section 21 and the inner peripheral wall of the first valve port 114, thereby ensuring the effectiveness of the sealing section 21 in blocking the first valve port 114 and ensuring the reliability and stability of the two-position three-way valve 100. When the sealing section 21 blocks the second valve port 115, the first sealing ring 211 is located between the sealing section 21 and the inner peripheral wall of the second valve port 115, which can prevent the medium from flowing out of the second valve port 115 through the gap between the sealing section 21 and the inner peripheral wall of the second valve port 115, thereby ensuring the effectiveness of the sealing section 21 in blocking the second valve port 115 and ensuring the reliability and stability of the two-position three-way valve 100.

[0061] In a further embodiment of the present invention, referring to the attached Figure 6As shown, a groove 212 is provided on the outer peripheral wall of the sealing section 21, and the groove 212 extends along the circumferential direction of the sealing section 21. The first sealing ring 211 is generally located in the groove 212. The groove 212 can position the first sealing ring 211 to prevent the first sealing ring 211 from moving along the axial direction of the housing 1. When the sealing section 21 blocks the first valve port 114, the first sealing ring 211 is located between the sealing section 21 and the inner circumferential wall of the first valve port 114 and has an interference fit with the inner circumferential wall of the first valve port 114, which can prevent the medium from flowing out of the two-position three-way valve 100 from the first valve port 114 through the gap between the sealing section 21 and the inner circumferential wall of the first valve port 114, thereby ensuring the effectiveness of the sealing section 21 in blocking the first valve port 114 and ensuring the reliability and stability of the two-position three-way valve 100; when the sealing section 21 blocks the second valve port 115, the first sealing ring 211 is located between the sealing section 21 and the inner circumferential wall of the second valve port 115 and has an interference fit with the inner circumferential wall of the second valve port 115, thereby preventing the medium from flowing out of the two-position three-way valve 100 from the second valve port 115 through the gap between the sealing section 21 and the inner circumferential wall of the second valve port 115, thereby ensuring the effectiveness of the sealing section 21 in blocking the second valve port 115 and ensuring the reliability and stability of the two-position three-way valve 100.

[0062] Further, refer to the attached Figure 6 As shown, the first sealing ring 211 is a non-O-ring. Driven by the drive assembly 3, the valve core 2 moves along the axial direction of the housing 1, so that the sealing section 21 blocks the first valve port 114 or the second valve port 115. If the first sealing ring were an O-ring, it would be easily squeezed or rotated, causing the first sealing ring to wear easily. However, a non-O-ring can reduce the friction between the valve core 2 and the lower housing 11, reduce the wear of the valve core 2 and the lower housing 11, reduce the maintenance cost of the two-position three-way valve 100, and thus extend the service life of the two-position three-way valve 100. It should be noted that the first sealing ring 211 being a non-O-ring means that the first sealing ring 211 is not an O-ring. The first sealing ring 211 can be a special-shaped sealing ring, such as a rectangular sealing ring, a K-shaped sealing ring, or an X-shaped sealing ring, to prevent the first sealing ring 211 from rolling within the groove 212.

[0063] It should be noted that in the prior art, two first sealing rings are usually provided on the outer sleeve of the sealing section. When one first sealing ring is used to seal the first valve port or the second valve port, the other first sealing ring is in a state of being surrounded by a medium. These media are usually in a state of high temperature and high pressure or other extreme environments, which can easily cause aging of the surrounded first sealing ring and affect the service life of the first sealing ring. Moreover, even if the medium is in a non-extreme state of normal temperature and pressure, it can easily cause aging of the first sealing ring due to long-term erosion and immersion.

[0064] A first sealing ring 211 is sleeved on the sealing section 21 of the utility model. The first sealing ring 211 can be used to seal the first valve port 114 and the second valve port 115. Compared with the prior art using two first sealing rings, the use of the first sealing ring 211 can be reduced, the size of the sealing section 21 in the axial direction of the shell 1 can be relatively reduced, the production cost of the two-position three-way valve 100 can be reduced, and the aging of the first sealing ring 211 caused by the medium can be reduced, thereby relatively extending the service life of the first sealing ring 211.

[0065] Further, refer to the attached Figure 2 and attached Figure 4 As shown, a second sealing ring 224 is provided between the inner peripheral wall of the second sub-cavity 132 and the outer peripheral wall of the guide section 22. The second sealing ring 224 can separate the second sub-cavity 132 into two parts in the axial direction of the housing 1 (see attached Figure 2 The third sub-cavity 133 and the fourth sub-cavity 134 are arranged in the direction a shown in the figure, and the third sub-cavity 133 is always connected to the second cavity 14. The fourth sub-cavity 134 is located on the side of the third sub-cavity 133 facing the second valve port 115, which can prevent the medium in the fourth sub-cavity 134 from flowing from the gap between the outer peripheral wall of the guide section 22 and the inner peripheral wall of the second sub-cavity 132 to the third sub-cavity 133, thereby ensuring the sealing effectiveness of the two-position three-way valve 100, and can reduce the friction between the valve core 2 and the lower shell 11 to a certain extent, reduce the wear of the valve core 2 and the lower shell 11, reduce the maintenance cost of the two-position three-way valve 100, and thus extend the service life of the two-position three-way valve 100.

[0066] The third sub-cavity 133 is located on the upper side of the second sealing ring 224 of the second sub-cavity 132 ( Figure 2 The third sub-cavity 133 is always connected to the second cavity 14, and the fourth sub-cavity 134 is the second sub-cavity 132 located on the lower side of the second sealing ring 224 ( Figure 2 The portion of the second sealing ring 224 (shown facing the second valve port 115) within the second sub-cavity 132, and the proportions of the third sub-cavity 133 and the fourth sub-cavity 134, are determined by the vertical position of the second sealing ring 224. When the sealing segment 21 seals the first valve port 114, the first sub-cavity 131 and the fourth sub-cavity 134 are not connected. When the sealing segment 21 does not seal the second valve port 115, the first sub-cavity 131 and the fourth sub-cavity 134 are connected.

[0067] In a further embodiment of the present invention, refer to the attached Figure 5As shown, the outer diameter of the guide section 22 is S1, the outer diameter of the sealing section 21 is S2, and it satisfies: S1=S2, which can facilitate the normal installation of the valve core 2, reduce the installation difficulty of the valve core 2, reduce the assembly difficulty of the two-position three-way valve 100, and ensure the pressure balance on both sides of the valve core 2 along the axial direction of the shell 1, ensuring that the valve core 2 can be moved along the axial direction of the shell 1.

[0068] It should be noted that if Figure 2 and Figure 5 As shown, the valve core 2 also includes a connecting section 23, and the two ends of the connecting section 23 along the axial direction of the shell 1 are respectively connected to the guide section 22 and the sealing section 21, and the guide section 22, the connecting section 23 and the sealing section 21 are arranged in sequence in the axial direction of the shell 1. The outer diameter of the connecting section 23 is S6, S6<S1=S2. It can be understood that when the sealing section 21 blocks the second valve port 115, part of the connecting section 23 is arranged opposite to the first valve port 114. By limiting S6<S1=S2, it can be ensured that the medium flows between the connecting section 23 and the inner circumferential wall of the first valve port 114, thereby avoiding the connecting section 23 blocking the first valve port 114 and affecting the normal circulation of the medium in the two-position three-way valve 100, thereby ensuring the reliability and stability of the two-position three-way valve 100.

[0069] Further, refer to the attached Figure 2 and attached Figure 3 As shown, the part of the lower shell 11 that cooperates with the guide section 22 is the guide part 117, the inner diameter of the guide part 117 is S3, the inner diameter of the first valve port 114 is S4, and the inner diameter of the second valve port 115 is S5, and it satisfies: S3=S4=S5=S1=S2, which can ensure that during the switching of the valve core 2, the interior of the two-position three-way valve 100 is always in a pressure balance state, reduce the influence of the valve core 2 due to the pressure difference, ensure the effectiveness and reliability of the movement of the valve core 2, and ensure the effectiveness of the sealing section 21 in blocking the first valve port 114 and the second valve port 115.

[0070] Preferably, a tolerance of 5% is allowed between S3, S4 and S5. For example, during the production and processing, on the basis of ensuring a tolerance of 5%, S5 is made slightly larger than S4, and S4 is slightly larger than S3. This can reduce the difficulty of the sealing section 21 in sealing the first valve port 114 and the second valve port 115, ensure that the sealing section 21 seals the first valve port 114 and the second valve port 115, avoid radial deviation of the sealing section 21 and cause sealing failure, and ensure the operation reliability of the two-position three-way valve 100.

[0071] Preferably, if S3=S4=S5, S2 can be made slightly smaller than S1 within a tolerance range of 5%, thereby reducing the difficulty of installing the valve core 2 into the lower shell 11. While ensuring pressure balance, the production and processing standards of the lower shell 11 can be lowered, the production and processing difficulty of the lower shell 11 can be reduced, and the assembly of the two-position three-way valve 100 can be facilitated.

[0072] Further, see the attached Figure 3 As shown, the lower housing 11 is provided with a plurality of third sealing rings 15, which are spaced apart in the axial direction of the housing 1 and arranged in the direction from the first valve port 114 to the second valve port 115 (see attached Figure 2 In the direction a shown in the figure, the outer diameter of the lower shell 11 gradually decreases, and the outer diameters of the multiple third sealing rings 15 gradually decrease, which can facilitate the assembly of the lower shell 11 to the desired position, avoid damage to the assembly position due to skewness during the assembly process, and avoid affecting the seal.

[0073] For example, see the attached Figure 2 and attached Figure 3 As shown, the lower shell 11 is covered with three third sealing rings 15, and the three third sealing rings 15 are spaced apart in the axial direction of the shell 1. In the direction from the first valve port 114 to the second valve port 115, the three third sealing rings 15 are sequentially a first sub-sealing ring 151, a second sub-sealing ring 152 and a third sub-sealing ring 153. The first sub-sealing ring 151 is sleeved on the outer peripheral wall of the lower shell 11 at a position relative to the first valve port 114, the second sub-sealing ring 152 is sleeved on the outer peripheral wall of the lower shell 11 at a position relative to the second valve port 115, and the third sub-sealing ring 153 is sleeved on the outer peripheral wall of the guide portion 117. The outer diameter of the position where the first sub-sealing ring 151 of the shell 11 is provided is S7, the outer diameter of the position where the second sub-sealing ring 152 of the lower shell 11 is provided is S8, and the outer diameter of the position where the third sub-sealing ring 153 of the guide portion 117 is provided is S9, S9≥S7≥S8. Correspondingly, the outer diameters of the first sub-sealing ring 151, the second sub-sealing ring 152 and the third sub-sealing ring 153 also decrease successively, which can divide the area outside the lower shell 11 into four independent cavities, prevent the medium from escaping to other chambers, ensure the sealing of the lower shell 11, and prevent the medium from escaping to the outside to avoid pollution to the environment.

[0074] Other structures and operations of the two-position three-way valve 100 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0075] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0076] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A two-position three-way valve, characterized in that: include: A housing (1), the housing (1) comprising a lower housing (11), a first cavity (13) being provided in the lower housing (11), an anti-rotation groove (111) being provided on an inner wall of the first cavity (13), the anti-rotation groove (111) extending along the axial direction of the housing (1); A valve core (2) is provided in the first cavity (13) and is movable along the axial direction of the housing (1); an anti-rotation lug (221) is provided on the outer peripheral wall of the valve core (2) and is matched with the anti-rotation groove (111).

2. The two-position three-way valve according to claim 1, characterized in that: The anti-rotation lugs (221) are multiple and spaced apart along the circumferential direction of the valve core (2), and the anti-rotation grooves (111) are multiple and correspond one-to-one to the multiple anti-rotation lugs (221).

3. The two-position three-way valve according to claim 1, characterized in that: The housing (1) further comprises an upper housing (12), wherein the upper housing (12) and the lower housing (11) are arranged and connected along the axial direction of the housing (1), and the upper housing (12) has a second cavity (14). The two-position three-way valve (100) further comprises: A drive assembly (3), at least part of which is disposed in the second cavity (14) and connected to the valve core (2), and is used to drive the valve core (2) to move along the axial direction of the housing (1).

4. The two-position three-way valve according to claim 3, characterized in that: The inner peripheral wall of the first cavity (13) is provided with a step portion (112), and the end surface of the anti-rotation lug (221) facing away from the upper shell (12) is suitable for abutting against the step portion (112).

5. The two-position three-way valve according to claim 4, characterized in that: An annular protrusion (222) extending in the circumferential direction of the valve core (2) is provided on the outer peripheral wall of the valve core (2); the anti-rotation lug (221) is provided on the outer peripheral wall of the annular protrusion (222); and the end surface of the annular protrusion (222) facing away from the upper shell (12) is suitable for abutting against the step portion (112).

6. The two-position three-way valve according to claim 3, characterized in that: A protrusion (223) is provided on the end surface of the valve core (2) facing the upper shell (12), and the protrusion (223) is suitable for abutting against the end surface of the upper shell (12) facing the lower shell (11).

7. The two-position three-way valve according to claim 3, characterized in that: The valve core (2) has a balancing flow channel (24) extending in the axial direction of the housing (1), and both ends of the balancing flow channel (24) in the axial direction of the housing (1) are open. The drive assembly (3) comprises a screw (31), the screw (31) extending in the axial direction of the housing (1), the screw (31) having a fitting section (311), the fitting section (311) passing through the balancing flow channel (24) and being threadedly connected to the balancing flow channel (24), and the cross section of the fitting section (311) along the length direction of the screw (31) being arcuate or open ring-shaped.

8. The two-position three-way valve according to claim 1, characterized in that: The first cavity (13) includes a first sub-cavity (131) and a second sub-cavity (132), the first sub-cavity (131) and the second sub-cavity (132) being arranged along the axial direction of the shell (1), the lower shell (11) having a communicating hole (113) communicating with the first sub-cavity (131), a first valve port (114) and a second valve port (115), the communicating hole (113) being provided on the peripheral wall of the lower shell (11), the first valve port (114) and the second valve port (115) being provided at the axial ends of the first sub-cavity (131), respectively, and the anti-rotation groove (111) being provided on the inner wall of the second sub-cavity (132). The valve core (2) comprises a sealing section (21) and a guide section (22); the sealing section (21) extends into the first sub-cavity (131) through the first valve port (114) to block the first valve port (114) or the second valve port (115); the guide section (22) is located on a side of the sealing section (21) facing away from the second valve port (115) and is arranged in the second sub-cavity (132); the anti-rotation lug (221) is arranged on the outer peripheral wall of the guide section (22).

9. The two-position three-way valve according to claim 8, characterized in that: A first sealing ring (211) is sleeved on the sealing section (21); when the sealing section (21) blocks the first valve opening (114), the first sealing ring (211) is located between the sealing section (21) and the inner peripheral wall of the first valve opening (114); and when the sealing section (21) blocks the second valve opening (115), the first sealing ring (211) is located between the sealing section (21) and the inner peripheral wall of the second valve opening (115); And / or, a second sealing ring (224) is provided between the inner peripheral wall of the second sub-cavity (132) and the outer peripheral wall of the guide section (22).

10. The two-position three-way valve according to claim 8, characterized in that: The outer diameter of the guide section (22) is S1, the outer diameter of the sealing section (21) is S2, and the following conditions are satisfied: S1 = S2; And / or, the outer shell of the lower shell (11) is provided with a plurality of third sealing rings (15), and the plurality of third sealing rings (15) are arranged at intervals in the axial direction of the shell (1), and in the direction from the first valve port (114) to the second valve port (115), the outer diameter of the lower shell (11) gradually decreases, and the outer diameters of the plurality of third sealing rings (15) gradually decrease.

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