A three-way reversing valve

Abstract

The utility model discloses a tee reversing valve, the valve body is equipped with the water inlet, first water outlet and second water outlet with its valve cavity intercommunication, the valve core subassembly is rotated and is arranged in the valve cavity through the pivot, and is connected electromagnet drive mechanism through connecting rod mechanism, and the connecting rod mechanism includes first connecting rod and second connecting rod, and the first end of first connecting rod is hinged with second connecting rod through the pin shaft, and the second end of first connecting rod is equipped with the mounting hole of regular polygon, is equipped with the cooperation part of adaptation on the pivot, and the inner wall of mounting hole is equipped with the semicircular recess of extension along the axial direction, and the outside of cooperation part is equipped with the semicircular convex rib of matching with it. The utility model, through the accurate cooperation of semicircular recess and semicircular convex rib realizes the positioning function, guarantees the positional accuracy between valve core and connecting rod in the assembly process, supports blind operation, and can complete the assembly without visual alignment, improves the assembly convenience and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of directional valve technology, specifically to a three-way directional valve. Background Technology

[0002] The three-way reversing valve in a washing machine is used to guide the incoming water to different functional branches to meet the water distribution needs of various working modes. For example, in a regular drum washing machine, the water path can be switched between the washing and rinsing stages; in a washer-dryer combo, the water path can be switched between washing and drying modes.

[0003] To improve valve response speed, Chinese utility model patent CN 206268567 U discloses a three-way solenoid valve. The valve body has a hollow structure with one inlet and two outlets. An internally mounted movable piston vane has a rotating shaft connected to a linkage mechanism. The linkage mechanism consists of a rotating rod and a connecting rod. One end of the rotating rod is connected to an electromagnet drive mechanism, and the other end is hinged to the connecting rod, which in turn connects to the rotating shaft of the piston vane. When the electromagnet drive mechanism is energized, it drives the rotating rod, transmitting power through the connecting rod to rotate the rotating shaft and piston vane, thereby closing one outlet while opening the other, completing the water circuit switching action.

[0004] However, in this design, the rotating shaft and connecting rod use a prism hole fit structure. Since the piston rotor is irregularly shaped, visual observation is required during assembly, and blind assembly often results in errors, reducing assembly efficiency. Utility Model Content

[0005] To address the aforementioned shortcomings, the technical problem to be solved by this utility model is to provide a three-way reversing valve to solve the problems of frequent errors and low assembly efficiency in the blind assembly of existing technologies.

[0006] Therefore, this application proposes a three-way reversing valve, including a valve body, a valve core assembly, and an electromagnet drive mechanism. The valve body is provided with an inlet, a first outlet, and a second outlet communicating with its valve cavity. The valve core assembly is rotatably disposed in the valve cavity. The valve core assembly is connected to the electromagnet drive mechanism through a linkage mechanism. The electromagnet drive mechanism drives the valve core assembly to rotate, selectively connecting the inlet with either the first outlet or the second outlet.

[0007] The valve core assembly includes a valve core, which is rotatably disposed within the valve cavity via a rotating shaft;

[0008] The linkage mechanism includes a first link and a second link. The first end of the first link is hinged to the first end of the second link via a pin. The second end of the first link is provided with a mounting hole, which is a regular polygonal hole. The rotating shaft is provided with a mating part that matches the mounting hole. The mating part is inserted into the mounting hole. The inner wall of the mounting hole is provided with a semi-circular groove extending along its axial direction. The outer surface of the mating part is provided with a matching semi-circular protrusion.

[0009] Based on the above technical solution, in the structural design of the valve core shaft and connecting rod mechanism, this utility model provides an axially extending semi-circular groove on the inner wall of the first connecting rod mounting hole, and correspondingly configures a matching semi-circular protrusion on the mating part of the valve core shaft. The precise fit between the semi-circular groove and the semi-circular protrusion achieves a positioning function, effectively ensuring the accuracy of the relative position between the valve core and the connecting rod during assembly. This structural design supports blind assembly, allowing the assembly of key components to be completed without visual alignment, significantly improving the convenience and efficiency of assembly.

[0010] In a preferred embodiment, one end of the valve body is open, the valve cover is fastened and fixed to the open end of the valve body, the rotating shaft passes through the valve cover and is connected to the first connecting rod, a sealing ring is provided between the rotating shaft and the valve cover, and the electromagnet drive mechanism is fixed on the valve cover.

[0011] Furthermore, the cross-section of the valve cavity is fan-shaped, the inlet is located on the arc surface of the valve cavity, and the first outlet and the second outlet are respectively located on the two sides of the valve cavity, which makes the switching path of the fluid in the valve cavity more reasonable, reduces flow resistance, and improves the switching response speed and flow stability.

[0012] In the above technical solution, preferably, a sealing gasket is provided on the mating surface between the valve cover and the valve body.

[0013] In the above technical solution, preferably, one end of the mounting hole is provided with an elastic buckle structure, and the corresponding end of the rotating shaft is provided with an annular groove. After the corresponding end of the rotating shaft passes through the mounting hole, the elastic buckle structure is engaged in the annular groove to achieve axial self-locking and fixation, thereby avoiding loosening caused by vibration during operation.

[0014] In the above technical solution, preferably, the protruding end of the pin is provided with an elastic hook. After the elastic hook passes through the first connecting rod, the elastic hook is locked on the outer surface of the first connecting rod, thereby realizing the quick locking of the pin and preventing it from falling off.

[0015] In the above technical solution, preferably, the elastic hook is shaped like a frustum, with the root diameter being larger than the pin diameter and the end diameter being smaller than the pin diameter, which facilitates insertion during assembly and forms a reverse limit by elastic recovery after being in place, thereby improving the connection firmness.

[0016] In the above technical solution, preferably, the elastic hook is composed of four circumferentially distributed independent locking blocks. Each locking block is triangular prism-shaped, with its bottom surface fixedly connected to the end of the pin shaft. There is a gap between adjacent locking blocks, so that each locking block has independent elastic deformation capability, which not only ensures smooth assembly, but also enhances the locking force.

[0017] In the above technical solution, preferably, the hinge hole on the first connecting rod that mates with the pin is an elongated hole structure, which allows for a certain degree of radial adjustment space, compensates for machining and assembly errors, alleviates stress concentration during the movement of the connecting rod mechanism, and extends its service life.

[0018] In the above technical solution, preferably, the cross-section of the valve core is an isosceles trapezoid, which matches the sector valve cavity, and can achieve a good sealing fit effect during rotation, ensuring that when the inlet is connected to any outlet, the other outlet is in a reliable closed state, preventing crossflow.

[0019] As can be seen from the above technical solution, the three-way reversing valve provided by this utility model has a valve core assembly connected to an electromagnet drive mechanism via a linkage mechanism. The electromagnet drive mechanism drives the valve core assembly to rotate, selectively connecting the inlet to either the first outlet or the second outlet. Specifically, the inner wall of the first linkage mounting hole in the linkage mechanism is provided with a semi-circular groove extending axially, and the mating part of the valve core shaft is correspondingly equipped with a matching semi-circular protrusion. The semi-circular groove and the semi-circular protrusion form an assembly positioning structure, effectively ensuring the accuracy of the assembly position, supporting blind assembly operations, and improving assembly efficiency. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments of this utility model or the prior art will be briefly introduced and explained below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the three-way reversing valve provided by this utility model;

[0022] Figure 2 for Figure 1 The diagram shows an exploded view of the three-way directional valve.

[0023] Figure 3 for Figure 1 The cross-sectional view of the three-way directional valve shown is shown.

[0024] Figure 4 This is a schematic diagram of the valve core assembly and connecting rod assembly assembled in this utility model;

[0025] Figure 5 for Figure 4 The diagram shows the assembly of the valve core assembly and the connecting rod assembly.

[0026] Figure 6 This is a schematic diagram of the telescopic rod of the connecting rod assembly and the electromagnet drive mechanism assembled in this utility model.

[0027] Figure 7 for Figure 6 Assembly diagram;

[0028] Figure 8 This is a schematic diagram of the connecting rod in this utility model;

[0029] Figure 9 This is a schematic diagram of the valve core structure in this utility model;

[0030] Figure 10 This is a schematic diagram of the assembly of the protective cover and the valve cover in this utility model;

[0031] Figure 11 This is a circuit diagram of the electromagnet drive mechanism in this utility model.

[0032] Figures 1-11 The correspondence between the parts is as follows:

[0033] Valve body 10, valve cover 20, sealing gasket 30, valve core assembly 40, connecting rod mechanism 50, electromagnet drive mechanism 60, protective cover 70;

[0034] Valve chamber 11, water inlet 12, first water outlet 13, second water outlet 14;

[0035] Hook 21;

[0036] Valve core 41, rotating shaft 42, sealing ring 43;

[0037] Fitting part 421, annular groove 422, semi-circular protrusion 423;

[0038] First link 51, second link 52, pin 53;

[0039] Mounting hole 511, elastic snap-fit ​​structure 512, semi-circular groove 513;

[0040] 531 elastic hook;

[0041] 71 locating hole, 72 support column. Detailed Implementation

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the embodiments described below are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0043] To provide a clearer explanation and description of the technical solution and implementation method of this utility model, several preferred specific embodiments for implementing the technical solution of this utility model are introduced below.

[0044] It should be noted that the directional terms such as "inner" and "outer", "front" and "back" and "left" and "right" in this article are based on the product's usage status. Obviously, the use of these directional terms does not limit the scope of protection of this solution.

[0045] like Figure 1 , Figure 2 , Figure 3 As shown, the present invention provides a three-way reversing valve, including a valve body 10, a valve core assembly 40, and an electromagnet drive mechanism 60.

[0046] The valve body 10 is provided with an inlet 12, a first outlet 13, and a second outlet 14 that communicate with its valve cavity 11. The valve cavity 11 has a fan-shaped cross-section. The inlet 12 is located on the arc surface of the valve cavity 11, and the first outlet 13 and the second outlet 14 are respectively located on two sides of the valve cavity 11, so that the fluid path is symmetrically distributed, which facilitates the switching of flow direction.

[0047] The valve cover 20 is snapped onto the open end of the valve body 10, and a sealing gasket 30 is provided on the mating surface between the two to ensure the sealing performance of the connection. In this embodiment, the valve cover 20 and the valve body 10 are detachably connected by a snap-fit ​​structure, which facilitates later maintenance and replacement of internal components.

[0048] A valve core assembly 40 is rotatably mounted inside the valve body 10. The valve core assembly 40 is connected to an electromagnet drive mechanism 60 via a linkage mechanism 50. The electromagnet drive mechanism 60 is fixedly mounted on the valve cover 20. The electromagnet drive mechanism 60 drives the valve core assembly 40 to rotate around a pivot, thereby selectively connecting the inlet 12 to either the first outlet 13 or the second outlet 14, thus switching the direction of media flow. After receiving an external control signal, the electromagnet drive mechanism 60 generates magnetic force to drive the telescopic shaft, which in turn drives the valve core assembly 40 to rotate to a preset position via the linkage mechanism 50, completing the reversing operation.

[0049] like Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 As shown, the valve core assembly 40 includes a valve core 41, which is rotatably mounted in the valve cavity 11 via a rotating shaft 42. The working surface of the valve core 41 is provided with a sealing gasket structure for sealing against the end faces of the first outlet 13 and the second outlet 14, improving sealing reliability. The first end of the rotating shaft 42 is rotatably mounted on the inner wall of the valve cavity 11, and the second end extends through the valve cover 20 and connects to the linkage mechanism 50. A sealing ring 43 is provided between the rotating shaft 42 and the protruding part of the valve cover 20 to prevent liquid leakage along the rotating shaft. The sealing ring 43 can be made of fluororubber O-rings, which have good temperature resistance and anti-aging properties.

[0050] The linkage mechanism 50 includes a first link 51 and a second link 52. The first end of the first link 51 is hinged to the first end of the second link 52 via a pin 53. The second end of the first link 51 has a mounting hole 511, which is a regular polygonal hole. In this embodiment, a regular pentagonal hole is used, but a regular hexagonal, regular quadrilateral, or other even-sided polygonal structure can also be used, as long as it can transmit torque and allow axial insertion and removal. The rotating shaft 42 has a mating part 421 that is adapted to the mounting hole 511. The mating part 421 is inserted into the mounting hole 511, forming a non-circular mating transmission structure, which can effectively transmit rotational torque and avoid slippage.

[0051] One end of the mounting hole 511 is provided with an elastic snap-fit ​​structure 512, and the corresponding end of the rotating shaft 42 is provided with an annular groove 422. When one end of the rotating shaft 42 is inserted into the mounting hole 511, the elastic snap-fit ​​structure 512 automatically engages in the annular groove 422, achieving axial limiting and preventing the rotating shaft 42 from disengaging from the first connecting rod 51 during operation. This structural design not only improves assembly efficiency but also enables quick and easy disassembly and assembly, facilitating maintenance and component replacement. Preferably, the elastic snap-fit ​​structure 512 is composed of several elastic arms, with the ends of each elastic arm converging towards the center to form a guide slope, facilitating compression deformation during insertion and springback locking after insertion.

[0052] Furthermore, the inner wall of the mounting hole 511 is provided with a semi-circular groove 513 extending along its axial direction, and the outer periphery of the mating part 421 is provided with a matching semi-circular protrusion 423. When blind assembly is performed, the semi-circular groove 513 and the semi-circular protrusion 423 guide and position each other, ensuring accurate alignment during each assembly, avoiding misalignment, and significantly improving assembly efficiency and reliability.

[0053] The protruding end of the pin 53 is equipped with an elastic hook 531. After the pin 53 passes through the hinge lug of the first connecting rod 51, the elastic hook 531 opens outward and locks onto the outer surface of the first connecting rod 51, preventing the pin 53 from falling off. This connection method simplifies the structure and improves overall reliability. The elastic hook 531 is generally frustoconical in shape, with a root diameter larger than the pin 53 diameter and an end diameter smaller than the pin 53 diameter. It consists of four circumferentially distributed independent locking blocks, each of which is triangular prism-shaped, with gaps between the blocks. Its bottom surface is fixedly connected to the end of the pin 53. This split elastic structure improves overall strength and reduces the risk of breakage. On the other hand, each locking block has a large centripetal deformation capacity, resulting in uniform force distribution during pressing, making installation easier. It also has good resilience to ensure a locking effect.

[0054] Furthermore, the hinge hole on the first connecting rod 51 that mates with the pin 53 is designed as an elongated hole structure, i.e., an elliptical hole or racetrack hole with a certain allowance along the length of the connecting rod. This design can absorb manufacturing errors and assembly clearances during the operation of the connecting rod mechanism 50, alleviate jamming caused by tolerance accumulation, improve the smoothness and flexibility of the mechanism's operation, and extend its service life.

[0055] In this application, the valve core 41 has an isosceles trapezoidal cross-section, with its two inclined sides corresponding to and fitting the inner end faces of the first outlet 13 and the second outlet 14, respectively. Compared to traditional rectangular cross-section valve cores, the isosceles trapezoidal structure can fit more tightly to the outlet end face after rotation into position, reducing leakage channels and significantly improving sealing performance.

[0056] A protective cover 70 is fixedly provided on the valve cover 20, covering the electromagnet drive mechanism 60 and the linkage mechanism 50, and playing a protective role.

[0057] like Figure 2 , Figure 10 As shown, the top surface of the valve cover 20 is provided with at least two elastic posts, and the ends of the elastic posts are provided with hooks 21. The corresponding side walls of the protective cover 70 are provided with locking holes 71. The inner surface of the top wall of the protective cover 70 is provided with support posts 72 at the positions corresponding to the elastic posts, and the upper part of the support posts 72 is sloping. When the protective cover 70 is installed, the sloping part of the support post 72 first contacts the elastic post, and generates radial compression during its continued downward pressing, causing the elastic post to undergo elastic deformation. When the protective cover 70 is assembled in place, the elastic post returns to its original shape, and the hooks 21 are inserted into the locking holes 71 to lock it, thereby firmly fixing the protective cover 70 to the valve cover 20 and effectively preventing the protective cover 70 from accidentally falling off.

[0058] In addition, such as Figure 11As shown, a varistor U is connected in parallel to the power input terminal of the electromagnet drive mechanism 60. When the input voltage exceeds the threshold, the varistor U quickly conducts to discharge transient overvoltage energy, thereby stabilizing the power supply performance of the electromagnet drive mechanism 60, providing effective surge protection, and avoiding damage to the control circuit and other sensitive electronic components caused by voltage spikes due to power grid fluctuations or external interference.

[0059] In summary, the three-way directional valve provided by this utility model has the following advantages compared with the prior art:

[0060] First, the inner wall of the mounting hole of the first connecting rod is provided with a semi-circular groove extending along its axial direction, and the mating part of the valve core shaft is provided with a matching semi-circular protrusion. The semi-circular groove and the semi-circular protrusion guide and position each other, which facilitates blind assembly operation and improves assembly efficiency.

[0061] Secondly, the first and second connecting rods are hinged together by a pin, and the extended end of the pin is provided with an elastic hook to form an anti-disengagement and limiting structure, which prevents the pin from axially disengaging during vibration or reciprocating motion, thereby improving overall reliability.

[0062] Third, the elastic latch is shaped like a frustum, with a root diameter larger than the pin diameter and an end diameter smaller than the pin diameter. It consists of four independent latching blocks evenly distributed circumferentially. Each latching block is triangular prism-shaped, with gaps between adjacent latching blocks. When the elastic structure is compressed, each latching block can independently contract centripetally, reducing insertion resistance and improving the overall strength of the structure. At the same time, it has good resilience and adaptive deformation capabilities, ensuring locking stability during long-term use.

[0063] Finally, it should be noted that the terms "comprising," "including," or any other variations thereof as used herein are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. This invention is not limited to the above-described preferred embodiments. Anyone should understand that structural changes made under the guidance of this invention, and any technical solutions that are the same as or similar to this invention, fall within the protection scope of this invention.

Claims

1. A three-way reversing valve, comprising a valve body, a valve core assembly, and an electromagnet drive mechanism, wherein the valve body is provided with an inlet, a first outlet, and a second outlet communicating with its valve cavity; the valve core assembly is rotatably disposed within the valve cavity; the valve core assembly is connected to the electromagnet drive mechanism via a linkage mechanism; the electromagnet drive mechanism drives the valve core assembly to rotate, selectively connecting the inlet to either the first outlet or the second outlet, characterized in that... The valve core assembly includes a valve core, which is rotatably disposed within the valve cavity via a rotating shaft; The linkage mechanism includes a first link and a second link. The first end of the first link is hinged to the first end of the second link via a pin. The second end of the first link is provided with a mounting hole, which is a regular polygonal hole. The rotating shaft is provided with a mating part that matches the mounting hole. The mating part is inserted into the mounting hole. The inner wall of the mounting hole is provided with a semi-circular groove extending along its axial direction. The outer surface of the mating part is provided with a matching semi-circular protrusion.

2. The three-way directional valve according to claim 1, characterized in that, One end of the valve body is open, and the valve cover is fastened and fixed to the open end of the valve body. The rotating shaft passes through the valve cover and is connected to the first connecting rod. A sealing ring is provided between the rotating shaft and the valve cover. The electromagnet drive mechanism is fixed on the valve cover.

3. The three-way directional valve according to claim 1, characterized in that, The valve cavity has a fan-shaped cross-section, the inlet is located on the arc surface of the valve cavity, and the first outlet and the second outlet are respectively located on two sides of the valve cavity.

4. The three-way directional valve according to claim 2, characterized in that, A sealing gasket is provided on the mating surface between the valve cover and the valve body.

5. The three-way directional valve according to claim 1, characterized in that, One end of the mounting hole is provided with an elastic buckle structure, and the corresponding end of the rotating shaft is provided with an annular groove. After the corresponding end of the rotating shaft passes through the mounting hole, the elastic buckle structure is engaged in the annular groove.

6. The three-way directional valve according to claim 1, characterized in that, The protruding end of the pin is provided with an elastic hook. After the elastic hook passes through the first connecting rod, it is engaged with the outer surface of the first connecting rod.

7. The three-way directional valve according to claim 6, characterized in that, The elastic hook is generally truncated cone-shaped, with a root diameter larger than the pin diameter and an end diameter smaller than the pin diameter.

8. The three-way directional valve according to claim 7, characterized in that, The elastic latch consists of four circumferentially distributed independent latch blocks. Each latch block is triangular prism-shaped, with its bottom surface fixedly connected to the end of the pin shaft, and a gap is provided between adjacent latch blocks.

9. The three-way directional valve according to claim 1, characterized in that, The hinge hole on the first connecting rod that mates with the pin is an elongated hole structure.

10. The three-way directional valve according to claim 1, characterized in that, The valve core has an isosceles trapezoidal cross-section.

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