Three-way valve

Abstract

The utility model provides a three-way valve which comprises a valve body assembly, a first valve element and a second valve element. A stator part; the rotor part is provided with a first limit position and a second limit position which are oppositely arranged; the middle point between the upper end face and the lower end face of the stator part is defined as the middle position, when the rotor part is located at the first limiting position, the valve element assembly blocks the first valve port, the distance between the upper end face of the rotor part and the middle position in the axial direction is L1, and when the rotor part is located at the second limiting position, the valve element assembly blocks the second valve port, the distance between the lower end face of the rotor part and the middle position in the axial direction is L2, and L1-L2 is larger than or equal to-0.2 mm and smaller than or equal to 0.2 mm. According to the technical scheme, the problem that when the two valve ports of the three-way valve in the prior art are opened, driving force generated by cooperation of the stator component and the rotor component is different can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to three -way valve technical field, specifically, three -way valve. BACKGROUND

[0002] Among them, in the design, processing to electronic expansion valve, in order to ensure the driving force when opening valve reaches optimal value, rotor component is in lower limit position, rotor component is located in the middle position of stator component, when rotor component is in upper limit position, rotor component is away from the middle position of stator component, which will cause the driving force of rotor when initial closing to reduce greatly.

[0003] In the prior art, three -way valve usually also adopts the above design method, but three -way valve has A valve port and B valve port, A valve port is located above B valve port, if adopting rotor component and stator component position of traditional stepper motor, when B valve port opens, can ensure that the driving force is optimal value, but when A valve port opens, rotor component will be away from the middle position of stator component, and the driving force when A valve port opens will greatly reduce, and is far less than the driving force when B valve port opens, and even can cause A valve port to open normally. SUMMARY

[0004] The utility model provides a kind of three -way valve, to solve the problem that the driving force different that two valve ports in prior art three -way valve is generated when opening by stator component and rotor component cooperation.

[0005] The utility model provides a kind of three -way valve, three -way valve includes: valve body subassembly, valve body subassembly has valve cavity, first communication port, second communication port and third communication port, first communication port, second communication port and third communication port are communicated with valve cavity, first valve port and second valve port are provided in valve cavity, first valve port is located above second valve port;Stator component, stator component is set on the outside of valve body subassembly;Rotor component, rotor component is movably arranged in valve cavity along axial direction, rotor component is correspondingly set with stator component, rotor component has oppositely arranged first limit position and second limit position;Valve core subassembly, setting is in valve cavity, rotor component drives valve core subassembly and moves in valve cavity along axial direction, so that valve core subassembly blocks first valve port or second valve port, define the midpoint between the upper end surface and lower end surface of stator component as intermediate position, when rotor component is located in first limit position, valve core subassembly blocks first valve port, the distance between the upper end surface of rotor component and intermediate position in axial direction is L1, when rotor component is located in second limit position, valve core subassembly blocks second valve port, the distance between the lower end surface of rotor component and intermediate position in axial direction is L2, -0.2mm≤L1-L2≤0.2mm.

[0006] Further, when the rotor component is located at the first limit position, the upper end surface of the rotor component is located above the upper end surface of the stator component, and the distance between the upper end surface of the rotor component and the upper end surface of the stator component is H1; when the rotor component is located at the second limit position, the lower end surface of the rotor component is located below the lower end surface of the stator component, and the distance between the lower end surface of the rotor component and the lower end surface of the stator component is H2, -0.2mm≤H1-H2≤0.2mm.

[0007] Further, when the rotor component is located at the first limit position, the distance H1 between the upper end surface of the rotor component and the upper end surface of the stator component is less than 1.5mm; when the rotor component is located at the second limit position, the distance H2 between the lower end surface of the rotor component and the lower end surface of the stator component is less than 1.5mm.

[0008] Further, the three-way valve further comprises a nut assembly, the nut assembly is arranged in the valve cavity, and the nut assembly comprises: a connecting plate connected with the rotor component; a screw rod, one end of the screw rod is fixedly connected with the connecting plate; a nut body, the nut body is sleeved on the screw rod, the nut body is threadedly connected with the screw rod, and one end of the nut body is fixed on the valve body assembly; a first guide sleeve, one end of the first guide sleeve is movably connected with the other end of the screw rod; a transmission sleeve, one end of the transmission sleeve is connected with the other end of the first guide sleeve, and the other end of the transmission sleeve is used for abutting against the valve core assembly; and a first elastic member, the first elastic member is arranged in the first guide sleeve and is arranged between the screw rod and the transmission sleeve, and when the valve core assembly moves from the first limit position to the second limit position, the screw rod can move relative to the first guide sleeve to the direction of the second valve port and compress the first elastic member.

[0009] Further, when the rotor component is located at the second limit position, the compression amount H3 of the first elastic member is arranged between 0.15mm and 0.25mm.

[0010] Further, the valve core assembly comprises: a valve core ring, the valve core ring is movably arranged in the valve cavity, and the transmission sleeve is located in the valve core ring; a second elastic member, the second elastic member is arranged between the valve core ring and the transmission sleeve, one end of the second elastic member abuts against the transmission sleeve, and the other end of the second elastic member abuts against the valve core ring, and the second elastic member provides an acting force on the transmission sleeve in the direction of the first valve port; and a valve core body, one end of the valve core body is connected with the valve core ring, and the other end of the valve core body is located between the first valve port and the second valve port and is used for blocking the first valve port and the second valve port, and when the valve core assembly moves from the second limit position to the first limit position, the transmission sleeve can move relative to the valve core ring to the direction away from the first valve port and compress the second elastic member.

[0011] Further, when the rotor component is located at the first limit position, the compression amount H4 of the second elastic member is arranged between 0.15mm and 0.25mm.

[0012] Further, the bottom of the transmission sleeve has an annular protrusion, the valve core ring has a first hole section and a second hole section, the first hole section is arranged away from the first valve port relative to the second hole section, the inner diameter of the first hole section is smaller than the inner diameter of the second hole section, the first hole section and the second hole section have a stepped surface therebetween, the valve core body is fixedly connected with the second hole section, the annular protrusion is movably arranged between the stepped surface and the valve core body, the annular protrusion can abut against the stepped surface, and the stepped surface and the annular protrusion can limit the first limit position of the rotor component.

[0013] Further, the bottom of the nut body has a lower limit block, and the nut assembly further comprises a guide piece fixed on the connecting plate and a stop ring sleeved on the outer side of the nut body, the outer side wall of the nut body is provided with a spiral groove, the stop ring is slidably arranged in the spiral groove, the guide piece can drive the stop ring to move along the axial direction of the nut body, the stop ring can abut against the lower limit block, and the stop ring and the lower limit block limit the second limit position of the rotor component.

[0014] Further, the valve body assembly comprises a valve body structure having a valve cavity, a first valve seat fixed in the valve cavity, the first valve seat having a flow-through port and a first valve port in communication with each other, the flow-through port being arranged away from the second valve port relative to the first valve port, and the inner diameter of the flow-through port gradually decreasing along the direction close to the first valve port, and a second valve seat fixed in the valve cavity, the second valve seat being located below the first valve seat, the second valve seat having a second valve port and a third communication port.

[0015] According to the technical scheme of the utility model, the rotor component is movably arranged in the valve cavity of the valve body assembly, the rotor component can drive the valve core assembly to move through the nut assembly, the rotor component has a first limit position and a second limit position, when the rotor component is located at the first limit position, the valve core assembly blocks the first valve port, the second valve port and the third valve port are communicated, and the distance between the upper end surface of the rotor component and the middle position in the axial direction is L1, when the rotor component is located at the second limit position, the valve core assembly blocks the second valve port, the distance between the lower end surface of the rotor component and the middle position in the axial direction is L2, and the difference between L1 and L2 is set to be between 0 and 0.2 mm. In this way, when the valve core assembly blocks the first valve port and the second valve port, the transmission torque of the rotor component at the first limit position and the second limit position is the same or has a very small difference, so that the driving force generated by the cooperation of the stator component and the rotor component is the same or has a very small difference while ensuring that the driving force generated by the cooperation of the stator component and the rotor component meets the requirement of the on-off valve, and then the first valve port and the second valve port can be normally opened and closed, and the reliability of the opening and closing of the first valve port and the second valve port is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings accompanying the specification provide further understanding of the present application, the illustrative embodiments thereof, and constitute a part of the present application. The illustrative embodiments thereof, and their descriptions serve to explain the present application, but do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 A structure schematic view of the three-way valve provided by the present application is shown;

[0018] Figure 2 A structure schematic view of the valve core assembly plugging the first valve port provided by the present application is shown;

[0019] Figure 3 A structure schematic view of the valve core assembly plugging the second valve port provided by the present application is shown; Figure 2 A local enlarged view of B in the middle is shown;

[0020] Figure 4 A structure schematic view of the valve core assembly plugging the second valve port provided by the present application is shown;

[0021] Figure 5 A structure schematic view of the second valve seat provided by the present application is shown; Figure 4 A local enlarged view of A in the middle is shown;

[0022] Figure 6 A structure schematic view of the second valve seat provided by the present application is shown;

[0023] Figure 7 A structure schematic view of the valve core ring provided by the present application is shown;

[0024] Figure 8 A structure schematic view of the first valve seat provided by the present application is shown;

[0025] Figure 9 A sectional view of the three-way valve provided by the present application is shown;

[0026] Figure 10 A structure schematic view of the stop ring and the lower limit block abutting provided by the present application is shown;

[0027] Figure 11 A sectional view of the three-way valve provided by the present application is shown.

[0028] Among the above drawings, the following reference signs are included:

[0029] 10, valve body assembly; 101, valve cavity;

[0030] 11, valve body structure;

[0031] 111, shell;

[0032] 112, mounting body;

[0033] 113, valve body; 1131, first communication port; 1132, second communication port;

[0034] 114, second guide sleeve;

[0035] 12, first valve seat; 121, flow port; 122, first valve port;

[0036] 13, second valve seat; 131, second valve port; 132, third communication port;

[0037] 20, stator component;

[0038] 30, rotor component;

[0039] 40, nut assembly;

[0040] 41, connecting plate; 42, screw rod;

[0041] 43, nut body; 431, lower limit block;

[0042] 44, first guide sleeve;

[0043] 45, transmission sleeve; 451, annular protrusion;

[0044] 46, first elastic member; 47, guide piece; 48, stop ring; 491, bearing; 492, pad;

[0045] 50, valve core assembly;

[0046] 51, valve core ring; 511, first hole section; 512, second hole section; 513, stepped surface;

[0047] 52, second elastic member; 53, valve core body. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0049] As Figures 1 to 5As shown, the utility model embodiment provides a three -way valve, three -way valve includes valve body subassembly 10, stator part 20, rotor part 30, nut assembly 40 and valve core subassembly 50. Valve body subassembly 10 has valve cavity 101, first communication mouth 1131, second communication mouth 1132 and third communication mouth 132, first communication mouth 1131, second communication mouth 1132 and third communication mouth 132 all with valve cavity 101 communicate, be provided with first valve mouth 122 and second valve mouth 131 in valve cavity 101, and first valve mouth 122 is located the top of second valve mouth 131. Stator part 20 is set on the outside of valve body subassembly 10. Rotor part 30 is movably arranged in valve cavity 101 along the axial direction, and rotor part 30 is correspondingly arranged with stator part 20, and rotor part 30 has oppositely arranged first limit position and second limit position. Nut assembly 40 is arranged in valve cavity 101, and rotor part 30 is drivingly connected with one end of nut assembly 40. Valve core subassembly 50 is arranged in valve cavity 101, and valve core subassembly 50 is connected with the other end of nut assembly 40, and rotor part 30 drives valve core subassembly 50 to move in valve cavity 101 along the axial direction through nut assembly 40, so that valve core subassembly 50 blocks first valve mouth 122 or second valve mouth 131. The midpoint between the upper end face and the lower end face of stator part 20 is defined as the intermediate position, when rotor part 30 is located at the first limit position, valve core subassembly 50 blocks first valve mouth 122, and the distance between the upper end face of rotor part 30 and the intermediate position in the axial direction is L1, when rotor part 30 is located at the second limit position, valve core subassembly 50 blocks second valve mouth 131, and the distance between the lower end face of rotor part 30 and the intermediate position in the axial direction is L2, -0.2mm≤L1-L2≤0.2mm. As Figure 11 As shown, E is the upper end face of stator part 20, F is the lower end face of stator part 20, and the upper end face and the lower end face of stator part 20 are the end faces of the coil body of stator part 20 after removing the plastic package.

[0050] The rotor component 30 is movably arranged in the valve cavity 101 of the valve body assembly 10, the rotor component 30 can drive the valve core assembly 50 to move, and the rotor component 30 has a first limit position and a second limit position, when the rotor component 30 is located at the first limit position, the valve core assembly 50 blocks the first valve port 122, the second valve port 131 and the third valve port are communicated, and the distance between the upper end surface of the rotor component 30 and the middle position in the axial direction is L1, when the rotor component 30 is located at the second limit position, the valve core assembly 50 blocks the second valve port 131, the distance between the lower end surface of the rotor component 30 and the middle position in the axial direction is L2, and the difference between L1 and L2 is arranged to be between 0 and 0.2mm. In this way, when the valve core assembly 50 blocks the first valve port 122 and the second valve port 131, the transmission torque of the rotor component 30 at the first limit position and the second limit position is the same or has a very small difference, so that the driving force generated by the cooperation of the stator component 20 and the rotor component 30 meets the requirements of the on-off valve, and the driving force generated by the cooperation of the stator component 20 and the rotor component 30 is the same or has a very small difference, thereby enabling the first valve port 122 and the second valve port 131 to be normally opened, and improving the reliability of the opening and closing of the first valve port 122 and the second valve port 131.

[0051] Optionally, L1-L2 can be -0.2mm, 0 or 0.2mm. Preferably, L1-L2 is 0, but due to factors such as machining errors, L1-L2 can also be -0.2mm or 0.2mm.

[0052] As shown in Figure 1 and Figure 4 When the rotor component 30 is located at the first limit position, the upper end surface of the rotor component 30 is located above the upper end surface of the stator component 20, and the distance between the upper end surface of the rotor component 30 and the upper end surface of the stator component 20 is H1. When the rotor component 30 is located at the second limit position, the lower end surface of the rotor component 30 is located below the lower end surface of the stator component 20, and the distance between the lower end surface of the rotor component 30 and the lower end surface of the stator component 20 is H2, and -0.2mm≤H1-H2≤0.2mm. In this way, the volume of the stator component 20 can be reduced, thereby reducing the volume of the three-way valve, facilitating the installation and use of the three-way valve, and at the same time ensuring the driving effect of the rotor component 30 on the valve core assembly 50 and the normal movement of the valve core assembly 50.

[0053] Optionally, H1-H2 can be -0.2mm, 0 or 0.2mm. Preferably, H1-H2 is 0, but due to factors such as machining errors, H1-H2 can also be -0.2mm or 0.2mm.

[0054] Optionally, in other embodiments, the upper end surface of the rotor component 30 is below the upper end surface of the stator component 20 at the first limit position, and the lower end surface of the rotor component 30 is above the lower end surface of the stator component 20 at the second limit position; or the upper end surface of the rotor component 30 is above the upper end surface of the stator component 20 at the first limit position, and the lower end surface of the rotor component 30 is above the lower end surface of the stator component 20 at the second limit position; or the upper end surface of the rotor component 30 is below the upper end surface of the stator component 20 at the first limit position, and the lower end surface of the rotor component 30 is below the lower end surface of the stator component 20 at the second limit position. When the above embodiments are adopted, L1 and L2 also satisfy the requirement of -0.2mm≤L1-L2≤0.2mm.

[0055] As shown in Figure 2 , Figure 4 When the rotor component 30 is at the first limit position, the distance H1 between the upper end surface of the rotor component 30 and the upper end surface of the stator component 20 is less than 1.5mm. When the rotor component 30 is at the second limit position, the distance H2 between the lower end surface of the rotor component 30 and the lower end surface of the stator component 20 is less than 1.5mm. In this way, when the rotor component 30 is at the first limit position and the second limit position, the driving force generated by the cooperation between the rotor component 30 and the stator component 20 can meet the requirements of the on-off valve, avoiding the spool assembly 50 being unable to open and close the first valve port 122 and the second valve port 131, and further improving the reliability of the three-way valve in operation. Moreover, when the rotor component 30 approaches the first limit position and the second limit position, the distance between the stator component 20 and the rotor component 30 is small, the magnetic coupling efficiency is improved, and the energy required to drive the rotor component 30 is reduced, thereby reducing the operating energy consumption of the three-way valve.

[0056] Optionally, when the rotor component 30 is at the first limit position, the distance H1 between the upper end surface of the rotor component 30 and the upper end surface of the stator component 20 can be 0, 1mm or 1.5mm, and in the present application, the distance H1 between the upper end surface of the rotor component 30 and the upper end surface of the stator component 20 is 1mm; when the rotor component 30 is at the second limit position, the distance H2 between the lower end surface of the rotor component 30 and the lower end surface of the stator component 20 can be 0, 1mm or 1.5mm, and in the present application, the distance H1 between the lower end surface of the rotor component 30 and the lower end surface of the stator component 20 is 1mm.

[0057] As shown in Figure 1 , Figure 4 and Figure 5As shown, the three-way valve further comprises a nut assembly 40 arranged in the valve cavity 101, the nut assembly 40 comprising a connecting plate 41, a screw rod 42, a nut body 43, a first guide sleeve 44, a transmission sleeve 45 and a first elastic member 46. The connecting plate 41 is connected with the rotor component 30. One end of the screw rod 42 is fixedly connected with the connecting plate 41. The nut body 43 is sleeved on the screw rod 42, and the nut body 43 is threadedly connected with the screw rod 42. One end of the nut body 43 is fixed on the valve body assembly 10. The other end of the first guide sleeve 44 is movably connected with the other end of the screw rod 42. One end of the transmission sleeve 45 is connected with the other end of the first guide sleeve 44, and the other end of the transmission sleeve 45 is used to abut against the valve core assembly 50. The first elastic member 46 is arranged in the first guide sleeve 44, and the first elastic member 46 is arranged between the screw rod 42 and the transmission sleeve 45. When the valve core assembly 50 is moved from the first limit position to the second limit position, the screw rod 42 can be moved to the direction of the second valve port 131 relative to the first guide sleeve 44 and compress the first elastic member 46. In this way, the rotor component 30 drives the screw rod 42 to rotate through the connecting rod, so that the relative displacement between the nut body 43 and the screw rod 42 is generated, the nut body 43 can compress the first elastic member 46, the first elastic member 46 can drive the valve core assembly 50 to block the second valve port 131, and the first elastic member 46 can improve the pre-tightening force of the valve core assembly 50 to block the second valve port 131 through the transmission sleeve 45. By adopting the above structure, it can be ensured that the valve core assembly 50 can form stable contact with the second valve port 131 when the second valve port 131 is closed, so that the sealing performance is improved and fluid leakage is reduced.

[0058] As shown, Figure 5 When the rotor component 30 is located at the second limit position, the compression amount H3 of the first elastic member 46 is set to be between 0.15 mm and 0.25 mm. In this way, when the compression amount H3 of the first elastic member 46 is less than 0.15 mm, the pre-tightening force provided by the first elastic member 46 is small, the sealing performance between the valve core assembly 50 and the second valve port 131 is small, and fluid is prone to leakage; when the compression amount H3 of the first elastic member 46 is greater than 0.25 mm, the pre-tightening force provided by the first elastic member 46 is large, the driving force required to close the second valve port 131 is too large, and the cost is increased; therefore, the compression amount H3 of the first elastic member 46 is set to be between 0.15 mm and 0.25 mm, so that the sealing performance between the valve core assembly 50 and the second valve port 131 can be ensured, and the driving force required to close the second valve port 131 is not too large, so that the energy consumption cost is not too high.

[0059] Alternatively, the compression amount H3 of the first elastic member 46 can be set to 0.15 mm, 0.2 mm or 0.25 mm. In the present application, the compression amount H3 of the first elastic member 46 is 0.2 mm.

[0060] Specifically, since the first elastic member 46 is always in a stressed state after being assembled, the compression amount H3 is the difference between the maximum length and the minimum length of the first elastic member 46 after being assembled, rather than the difference between the minimum length of the first elastic member 46 and the length of the first elastic member 46 when not stressed. Moreover, when the spool assembly 50 first blocks the second valve port 131, the rotor component 30 has not yet reached the second limit position, and the rotor component 30 continues to move towards the second valve port 131, continuing to compress the first elastic member 46. The first elastic member 46 can provide the pre-tightening force of the spool assembly 50 blocking the second valve port 131 through the transmission sleeve 45 until the rotor component 30 moves to the second limit position, at which time the first elastic member 46 is at the minimum length.

[0061] Further, the nut assembly 40 further comprises a bearing 491 and a pad 492, the bearing 491 is sleeved on the outer side of the screw rod 42, the end of the screw rod 42 is fixedly provided with the pad 492, the first elastic member 46 is sleeved on the outer side of the pad 492, and the bearing 491 and the pad 492 are located in the first guide sleeve 44. When the spool assembly 50 is away from the second valve port 131, the bearing 491 abuts against the top end of the first guide sleeve 44, and when the spool assembly 50 blocks the second valve port 131, there is a gap between the bearing 491 and the top end of the first guide sleeve 44. The gap between the bearing 491 and the top end of the first guide sleeve 44 is the compression amount H3 of the first elastic member 46.

[0062] As Figure 2 and Figure 3As shown, the valve core assembly 50 includes a valve core ring 51, a second elastic element 52, and a valve core body 53. The valve core ring 51 is movably disposed within the valve cavity 101, and the transmission sleeve 45 is located within the valve core ring 51. The second elastic element 52 is disposed between the valve core ring 51 and the transmission sleeve 45, with one end of the second elastic element 52 abutting against the transmission sleeve 45 and the other end abutting against the valve core ring 51. The second elastic element 52 provides a force to the transmission sleeve 45 toward the first valve port 122. One end of the valve core body 53 is connected to the valve core ring, and the other end of the valve core body 53 is located between the first valve port 122 and the second valve port 131 and is used to seal the first valve port 122 and the second valve port 131. When the valve core assembly 50 moves from the second limit position to the first limit position, the transmission sleeve 45 can move relative to the valve core ring 51 in a direction away from the first valve port 122 and compress the second elastic element 52. With this configuration, the rotor component 30 sequentially drives the valve core body 53 to move axially via the screw 42, bearing 491, first guide sleeve 44, transmission sleeve 45, and valve core ring 51. When the valve core body 53 moves towards the first valve port 122, the transmission sleeve 45 can compress the second elastic element 52. The driving force of the second elastic element 52 is transmitted to the valve core body 53 through the valve core ring 51, thereby enabling the second elastic element 52 to provide the valve core body 53 with a pre-tightening force to seal the first valve port 122 through the valve core ring 51. This configuration ensures that the valve core body 53 can provide an appropriate pre-tightening force when sealing the first valve port 122, thereby enhancing the sealing performance of the first valve port 122 and reducing fluid leakage.

[0063] like Figure 3 As shown, when the rotor component 30 is in the first extreme position, the compression amount H4 of the second elastic element 52 is set between 0.15mm and 0.25mm. With this setting, when the compression amount H4 of the second elastic element 52 is less than 0.15mm, the preload force provided by the second elastic element 52 is small, resulting in poor sealing between the valve core body 53 and the first valve port 122, making fluid leakage very easy. When the compression amount H4 of the second elastic element 52 is greater than 0.25mm, the preload force provided by the second elastic element 52 is large, requiring excessive driving force to close the first valve port 122, increasing costs. Therefore, the compression amount H4 of the second elastic element 52 is set between 0.15mm and 0.25mm, which ensures both the sealing between the valve core body 53 and the first valve port 122 and prevents excessive driving force required to close the first valve port 122, thus avoiding excessive energy consumption costs.

[0064] Optionally, the compression amount H4 of the second elastic member 52 can be set to 0.15mm, 0.2mm or 0.25mm. In this application, the compression amount H4 of the second elastic member 52 is 0.2mm.

[0065] Specifically, since the second elastic member 52 is always in a stressed state after being assembled, the compression amount H4 is the difference between the maximum length and the minimum length of the second elastic member 52 after being assembled, rather than the difference between the minimum length of the second elastic member 52 and the length of the second elastic member 52 when not stressed. Moreover, when the spool assembly 50 initially blocks the first valve port 122, the rotor component 30 has not yet reached the first limit position, and the rotor component 30 continues to move away from the first valve port 122, continuously compressing the second elastic member 52. The second elastic member 52 can provide the pre-tightening force of the spool body 53 blocking the first valve port 122 through the spool ring 51 until the rotor component 30 moves to the first limit position, at which time the second elastic member 52 is at the minimum length.

[0066] As shown in Figure 7 the bottom of the transmission sleeve 45 has an annular protrusion 451, the spool ring 51 has a first hole section 511 and a second hole section 512, the first hole section 511 is arranged away from the first valve port 122 relative to the second hole section 512, the inner diameter of the first hole section 511 is smaller than that of the second hole section 512, and the first hole section 511 and the second hole section 512 have a stepped surface 513 therebetween. The spool body 53 is fixedly connected to the second hole section 512, the annular protrusion 451 is movably arranged between the stepped surface 513 and the spool body 53, the annular protrusion 451 can abut against the stepped surface 513, and the stepped surface 513 and the annular protrusion 451 cooperate to limit the first limit position of the rotor component 30. In this way, the cooperation of the annular protrusion 451 and the stepped surface 513 can accurately limit the first limit position of the rotor component 30, ensuring the position accuracy of the spool assembly 50 when blocking or opening the first valve port 122, and improving the accuracy and reliability of fluid control.

[0067] Specifically, in the present application, the second elastic member 52 is sleeved on the outside of the transmission sleeve 45, and the second elastic member 52 is arranged between the annular protrusion 451 and the stepped surface 513.

[0068] Further, when the spool body 53 initially blocks the first valve port 122, the annular protrusion 451 does not abut against the stepped surface 513, at which time the spool body 53 continues to move upward until the annular protrusion 451 abuts against the stepped surface 513, and the second elastic member 52 provides the pre-tightening force of the spool body 53 blocking the first valve port 122. Moreover, after the stator component 20 is powered off, the second elastic member 52 can also provide the pre-tightening force at all times due to the self-locking of the screw and nut assembly.

[0069] When the spool body 53 is away from the second valve port 131, the annular protrusion 451 abuts against the spool body 53, and when the spool body 53 blocks the second valve port 131, the annular protrusion 451 abuts against the stepped surface 513, at which time the interval between the annular protrusion 451 and the spool body 53 is the compression amount H4 of the second elastic member 52.

[0070] As shown in Figure 9 and Figure 10 , the bottom of the nut body 43 has a lower limit block 431. The nut assembly 40 further comprises a driving tab 47 and a stop ring 48. The driving tab 47 is fixed on the connecting plate 41. The stop ring 48 is sleeved on the outer side of the nut body 43, the outer side wall of the nut body 43 is provided with a spiral groove, the stop ring 48 is slidingly arranged in the spiral groove, the driving tab 47 can drive the stop ring 48 to move in the axial direction of the nut body 43, the stop ring 48 can abut against the lower limit block 431, and the stop ring 48 cooperates with the lower limit block 431 to limit the second limit position of the rotor component 30. In this way, the cooperation of the stop ring 48 and the lower limit block 431 can accurately limit the position of the rotor component 30 when reaching the second limit position, and this limiting mechanism ensures the accurate stop of the rotor component 30 during movement, thereby improving the control accuracy and reliability of the three-way valve.

[0071] Among them, the three-way valve is a double-valve port structure, and the pulse control pre-tightening force can only be applied to one valve port. In the present application, the second valve port 131 is used to pulse control the pre-tightening force, that is, the compression amount of the first elastic element is controlled by the stop ring 48 and the lower stop, and the first valve port 122 is used to limit the control of the pre-tightening force, that is, the compression amount of the second elastic element 52 is controlled by the stepped surface 513 stop of the transmission sleeve 45 and the valve core ring 51.

[0072] Further, in order to consider the universality of the rotor component 30 and avoid the pre-tightening spring force being too large or too small when the first valve port 122 is closed due to manufacturing and assembly errors, the upper valve port is not in contact with the stop ring 48 when the upper stop is closed, and the structure of the transmission sleeve 45 and the valve core sleeve limiting is used to realize the limitation of the spring compression amount, and at the same time, the lower stop is in contact with the stop ring 48 when the lower valve port is closed, and the pulse is guaranteed to ensure the spring pre-tightening force.

[0073] As shown in Figure 1 , Figure 6 and Figure 8As shown, the valve body assembly 10 includes a valve body structure 11, a first valve seat 12 and a second valve seat 13. The valve body structure 11 has a valve cavity 101. The first valve seat 12 is fixed in the valve cavity 101, and has a flow communication port 121 and a first valve port 122 which are in communication with each other, and the communication port is arranged away from the second valve port 131 relative to the first valve port 122, and the inner diameter of the communication port gradually decreases in the direction close to the first valve port 122. The second valve seat 13 is fixed in the valve cavity 101, and is arranged below the first valve seat 12, and the second valve seat 13 has a second valve port 131 and a third communication port 132. In this way, the gradually decreasing inner diameter of the communication port in the direction close to the first valve port 122 can ensure the smoothness of the fluid flowing in the communication port, and avoid the blockage of the fluid in the communication port. Moreover, the second valve seat 13 is provided with the second valve port 131 and the third communication port 132, which facilitates the machining of the second valve seat 13, and facilitates the communication of the third communication port 132 with the external pipe.

[0074] As shown, Figure 1 The valve body structure 11 includes a housing 111, a mounting body 112, a valve body 113 and a second guide sleeve 114. The stator component 20 is sleeved on the outer side of the housing 111, and the rotor component 30 is movably arranged in the housing 111. One end of the mounting body 112 is fixedly connected with the housing 111, and the nut body 43 is fixed on the mounting body 112. The mounting body 112 is provided with a through hole, and the first guide sleeve 44 is movably arranged in the through hole. The valve body 113 is fixedly connected with the other end of the mounting body 112, and the valve body 113 is provided with a first communication port 1131 and a second communication port 1132. The housing 111, the mounting body 112 and the valve body 113 have a valve cavity 101, and the first valve seat 12 and the second valve seat 13 are arranged in the valve body 113, and the second valve seat 13 is arranged away from the mounting body 112 relative to the first valve seat 12. The second guide sleeve 114 is fixed on the other end of the mounting body 112, and is arranged in the valve body 113. One end of the valve core assembly 50 is movably arranged in the second guide sleeve 114, i.e. the valve core ring 51 is movably arranged in the second guide sleeve 114. In this way, the first communication port 1131 and the second communication port 1132 on the valve body 113, and the combination of the housing 111, the mounting body 112 and the valve body 113 provide precise and efficient fluid path switching capability. This structure ensures that the fluid can be smoothly switched between different communication ports according to the preset path, and improves the flexibility and accuracy of fluid control.

[0075] Specifically, during the machining process, the first valve seat 12 and the second valve seat 13 are pressed and welded with the valve body 113.

[0076] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.

[0077] The relative arrangement of components and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the present application unless otherwise specifically stated. Also, it is to be understood that the dimensions of the various parts shown in the drawings are not necessarily to scale. Techniques, methods, and apparatus known to those of ordinary skill are not discussed in detail because they would be apparent in context, and should be considered as part of the present description. In all examples shown and discussed herein, any specific values are to be interpreted as merely illustrative and not limiting. Other examples of the example embodiments can therefore have different values. It is noted that like numbers and letters on the figures identify like parts throughout the disclosure, and thus, once an item is defined in one figure, it is not necessary to discuss it further in connection with other figures where it is not explicitly defined.

[0078] In the description of the present application, it is to be understood that the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship are usually based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the indicated device or element must have a particular orientation or be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0079] For purposes of the description hereinafter, spatial relative terms, such as "above", "below", "upper", "lower", and the like, can be used to describe the relative position of one element or feature to another as illustrated in the figures. It will be understood that the spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "up" other elements or features would then be oriented "below" or "down" the other elements or features. Thus, the exemplary term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. Well, the spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "up" other elements or features would then be oriented "below" or "down" the other elements or features. Thus, the exemplary term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0080] In addition, it needs to be explained that the use of "first", "second" and the like words to limit the parts, only for the convenience of the corresponding parts for the distinction, such as no other declaration, the above words have no special meaning, therefore can not be understood as the restriction of the scope of protection of the utility model.

[0081] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A three-way valve characterized by, The three-way valve comprises: A valve body assembly (10) having a valve cavity (101), a first communication port (1131), a second communication port (1132) and a third communication port (132), all of which communicate with the valve cavity (101), a first valve port (122) and a second valve port (131) are arranged in the valve cavity (101), the first valve port (122) is located above the second valve port (131); A stator component (20) sleeved on the outside of the valve body assembly (10); A rotor component (30) movably arranged in the valve cavity (101) in the axial direction, corresponding to the stator component (20), having a first limit position and a second limit position arranged oppositely; A valve core assembly (50) arranged in the valve cavity (101), driven by the rotor component (30) to move in the axial direction in the valve cavity (101) so as to block the first valve port (122) or the second valve port (131), defining a midpoint between the upper end face and the lower end face of the stator component (20) as an intermediate position, when the rotor component (30) is located at the first limit position, the valve core assembly (50) blocks the first valve port (122), the distance between the upper end face of the rotor component (30) and the intermediate position in the axial direction is L1, when the rotor component (30) is located at the second limit position, the valve core assembly (50) blocks the second valve port (131), the distance between the lower end face of the rotor component (30) and the intermediate position in the axial direction is L2, -0.2mm≤L1-L2≤0.2mm.

2. The tee valve of claim 1, wherein When the rotor component (30) is located at the first limit position, the upper end face of the rotor component (30) is located above the upper end face of the stator component (20), the distance between the upper end face of the rotor component (30) and the upper end face of the stator component (20) is H1; when the rotor component (30) is located at the second limit position, the lower end face of the rotor component (30) is located below the lower end face of the stator component (20), the distance between the lower end face of the rotor component (30) and the lower end face of the stator component (20) is H2, -0.2mm≤H1-H2≤0.2mm.

3. The tee valve of claim 1, wherein When the rotor component (30) is located at the first limit position, the distance H1 between the upper end face of the rotor component (30) and the upper end face of the stator component (20) is less than 1.5mm; when the rotor component (30) is located at the second limit position, the distance H2 between the lower end face of the rotor component (30) and the lower end face of the stator component (20) is less than 1.5mm.

4. The tee valve of claim 1, wherein The three-way valve further comprises a nut assembly (40) arranged in the valve cavity (101), the nut assembly (40) comprising: a connecting plate (41) connected with the rotor component (30); a screw rod (42) fixedly connected with the connecting plate (41) at one end; a nut body (43) sleeved on the screw rod (42), the nut body (43) being threadedly connected with the screw rod (42), and one end of the nut body (43) being fixed on the valve body assembly (10); a first guide sleeve (44) movably connected with the other end of the screw rod (42); a transmission sleeve (45) connected with the other end of the first guide sleeve (44) at one end, and the other end of the transmission sleeve (45) being used for abutting against the valve core assembly (50); a first elastic member (46) arranged in the first guide sleeve (44) and arranged between the screw rod (42) and the transmission sleeve (45), when the valve core assembly (50) is moved from the first limit position to the second limit position, the screw rod (42) can be moved relative to the first guide sleeve (44) to the direction of the second valve port (131) and compress the first elastic member (46).

5. The tee valve of claim 4, wherein When the rotor component (30) is located at the second limit position, the compression amount H3 of the first elastic member (46) is set to be between 0.15mm and 0.25mm.

6. The tee valve of claim 4, wherein The valve core assembly (50) comprises: a valve core ring (51) movably arranged in the valve cavity (101), the transmission sleeve (45) being located in the valve core ring (51); a second elastic member (52) arranged between the valve core ring (51) and the transmission sleeve (45), one end of the second elastic member (52) abutting against the transmission sleeve (45), and the other end of the second elastic member (52) abutting against the valve core ring (51), the second elastic member (52) providing a force to the transmission sleeve (45) in the direction of the first valve port (122); a valve core body (53) connected with the valve core ring (51) at one end, the other end of the valve core body (53) being located between the first valve port (122) and the second valve port (131) and used for blocking the first valve port (122) and the second valve port (131), when the valve core assembly (50) is moved from the second limit position to the first limit position, the transmission sleeve (45) can be moved relative to the valve core ring (51) in the direction away from the first valve port (122) and compress the second elastic member (52).

7. The three-way valve according to claim 6, characterized in that When the rotor component (30) is located at the first limit position, the compression amount H4 of the second elastic member (52) is set to be between 0.15mm and 0.25mm.

8. The tee valve of claim 6, wherein The bottom of the transmission sleeve (45) has an annular protrusion (451), the spool ring (51) has a first hole section (511) and a second hole section (512), the first hole section (511) is arranged away from the first valve port (122) relative to the second hole section (512), the inner diameter of the first hole section (511) is smaller than that of the second hole section (512), and the first hole section (511) and the second hole section (512) have a stepped surface (513) therebetween, the spool body (53) is fixedly connected with the second hole section (512), the annular protrusion (451) is movably arranged between the stepped surface (513) and the spool body (53), the annular protrusion (451) can abut against the stepped surface (513), and the stepped surface (513) and the annular protrusion (451) can limit the first limit position of the rotor component (30).

9. The tee valve of claim 4, wherein, The bottom of the nut body (43) has a lower limit block (431), and the nut assembly (40) further comprises: a guide piece (47) fixed on the connecting plate (41); a stop ring (48) sleeved on the outer side of the nut body (43), the outer side wall of the nut body (43) is provided with a spiral groove, the stop ring (48) is slidably arranged in the spiral groove, the guide piece (47) can drive the stop ring (48) to move along the axial direction of the nut body (43), the stop ring (48) can abut against the lower limit block (431), and the stop ring (48) and the lower limit block (431) limit the second limit position of the rotor component (30).

10. The tee valve of claim 1, wherein The valve body assembly (10) comprises: a valve body structure (11) having the valve cavity (101); a first valve seat (12) fixed in the valve cavity (101), the first valve seat (12) has a flow-through port (121) and the first valve port (122) in communication with each other, the flow-through port is arranged away from the second valve port (131) relative to the first valve port (122), and the inner diameter of the flow-through port gradually decreases in the direction close to the first valve port (122); a second valve seat (13) fixed in the valve cavity (101), the second valve seat (13) is located below the first valve seat (12), and the second valve seat (13) has the second valve port (131) and the third flow-through port (132).

Images