A four-way valve sealing structure and an electric four-way valve

Abstract

The application relates to a four-way valve sealing structure and an electric four-way valve, and relates to the field of multi-way valve sealing equipment. The four-way valve sealing structure comprises an inner part, an end cover and an outer part. The outer part is arranged on the outer side of the inner part and supports the inner part on the end cover. The outer part comprises a pushing part for pushing the inner part to move and a supporting part for supporting the pushing part to move on the end cover. When the inner part partially covers the hole, the pushing part can be supported on the end cover through the supporting part, so that the axis of the inner part and the axis of the hole are arranged in parallel. The four-way valve sealing structure and the electric four-way valve provided by the application have the effect of reducing the suspension and inclination of the sealing ring during rotation.

Description

Technical Field

[0001] This application relates to the field of multi-way valve sealing equipment, and more particularly to a four-way valve sealing structure and an electric four-way valve. Background Technology

[0002] In air conditioning systems, four-way valves primarily function as switches between cooling and heating modes. A four-way valve is a fluid-guided valve, and its basic structure consists of two main parts:

[0003] 1. Valve body, with four ports, which are respectively connected to the compressor's exhaust pipe (D port), suction pipe (S port), indoor heat exchanger (E port), and outdoor heat exchanger (C port).

[0004] 2. Valve core: Located inside the valve body, the rotation of the valve core regulates the connection of the four ports of the valve body.

[0005] High-pressure refrigerant from the compressor flows in through port D and out through port C (D to C), heading towards the condenser. Low-pressure gaseous refrigerant from the evaporator flows in through port E and out through port S (E to S), returning to the compressor. When a mode switch is required, the valve core rotates a certain angle, changing the connection state to (D to E) and (C to S).

[0006] Regarding the aforementioned technologies, the inventors believe that currently, in order to seal the gap between the valve core and the end cap during movement, a sealing assembly is generally installed between the valve core and the end cap. The bottom end of the sealing assembly is generally sealed by a sealing ring against the end cap, but the sealing ring is difficult to install inside the sealing assembly. Utility Model Content

[0007] Therefore, it is necessary to provide a four-way valve sealing structure and an electric four-way valve that facilitates the installation of the sealing ring on the sealing assembly.

[0008] To solve the above-mentioned technical problems, this application provides the following technical solution:

[0009] A four-way valve sealing structure includes:

[0010] The internal component and the external component are separately arranged, and a mounting groove is provided between the internal component and the external component;

[0011] A sealing ring is installed in the mounting groove for limiting the movement of the inner component and the outer component. The bottom end of the sealing ring extends from the bottom ends of the inner component and the outer component.

[0012] It is understandable that the relatively separate internal and external components allow the sealing ring to be installed between them. This is achieved by slotting the internal component near the external component relative to the sealing ring, and slotting the external component near the internal component relative to the sealing ring. This facilitates the installation of the sealing ring.

[0013] In one embodiment, the outer component is sleeved on the outside of the inner component. The outer component includes a pushing part for moving the inner component and a supporting part for supporting the pushing part. When the inner component partially covers the channel on the end cap, the pushing part can be supported on the end cap by the supporting part so that the axis of the inner component and the axis of the channel remain parallel.

[0014] In one embodiment, the support includes two sets of support cantilever groups arranged opposite to each other, the two sets of support cantilever groups being symmetrical about the line connecting the center of the inner component and the axis of rotation of the inner component.

[0015] In one embodiment, the support portion and the pushing portion are independent components arranged separately, and the support portion and the pushing portion are fixedly connected relative to each other.

[0016] In one embodiment,

[0017] The support cantilever assembly includes a first cantilever and a second cantilever. The first cantilever has a first contact point that abuts against the end cap, and the second cantilever has a second contact point that abuts against the end cap.

[0018] The internal component is arranged in a circular shape, and the line connecting the first contact point and the second contact point is tangent to the outer circle of the internal component.

[0019] Alternatively, the line connecting the first contact point and the second contact point is located outside the outer circle of the inner component.

[0020] In one embodiment, the first cantilever has a first mounting hole relative to the first contact point, and a first support pin passes through the first mounting hole; the second cantilever has a second mounting hole relative to the second contact point, and a second support pin passes through the second mounting hole; the bottom end of the first support pin extends from the first cantilever and abuts against the end cap to form a first contact point, and the bottom end of the second support pin extends from the second cantilever and abuts against the end cap to form a second contact point.

[0021] In one embodiment, the first cantilever is fixedly connected to a first support pin cover plate above the first support pin, and the second cantilever is fixedly connected to a second support pin cover plate above the second support pin; the first mounting hole includes a first through hole and a first limiting hole that are in relative communication, the diameter of the first limiting hole is larger than the diameter of the first through hole, a first step is formed between the first limiting hole and the first through hole, and the head of the first support pin is limited between the first step and the first support pin cover plate; the second mounting hole includes a second through hole and a second limiting hole that are in relative communication, the diameter of the second limiting hole is larger than the diameter of the second through hole, a second step is formed between the second limiting hole and the second through hole, and the head of the second support pin is limited between the second step and the second support pin cover plate.

[0022] In one embodiment, two opposing sets of second cantilevers abut against the sidewalls of the valve core rotation shaft and rotate relative to each other, with the contact points of the opposing second cantilevers and the valve core rotation shaft located on both sides of the line connecting the center of the inner component and the axis of rotation of the inner component.

[0023] In one embodiment, the internal component includes a sealing mounting ring fixed to the sealing mounting ring, the bottom wall of the sealing ring abutting against the side wall of the end cap.

[0024] In one embodiment, the side wall of the sealing mounting ring is provided with a mounting groove, and the inner side wall of the pushing part is fixedly connected to a limiting ring. The inner wall of the mounting groove away from the end cover and the top wall of the limiting ring both abut against the sealing ring and limit the axial movement of the sealing ring.

[0025] In one embodiment, the sealing ring is provided with an expansion gap spaced between its radially outer sidewall and the inner sidewall of the pusher; or the sealing ring is provided with an expansion gap spaced between its radially inner sidewall and the outer sidewall of the inner component.

[0026] In one embodiment, the outer component has a first groove and the inner component has a second groove. When the inner component and the outer component are fixed, the first groove and the second groove form an injection molding groove, and a sealing ring formed by injection molding is present in the injection molding groove.

[0027] In one embodiment, the electric four-way valve further includes a valve core, with the inner component (1) sleeved on one end of the valve core.

[0028] This application also provides the following technical solutions:

[0029] An electric four-way valve includes a four-way valve sealing structure as described above.

[0030] Compared with the prior art, a four-way valve sealing structure sets up relatively separate internal and external parts, so that the sealing ring is installed between the internal and external parts. By slotting the internal part relative to the sealing ring on the side closer to the external part, and slotting the external part relative to the sealing ring on the side closer to the internal part, the sealing ring can be easily installed between the internal and external parts, thus facilitating the installation of the sealing ring. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the overall structure of a four-way valve sealing structure in an embodiment of this application.

[0033] Figure 2 This is an exploded view of a four-way valve sealing structure in an embodiment of this application.

[0034] Figure 3 This is a cross-sectional view of a sealing ring with a "T" shaped cross-section in one embodiment of a four-way valve sealing structure.

[0035] Figure 4 This is a cross-sectional view of the sealing ring of a four-way valve sealing structure in an embodiment of this application, which has an "L" shaped cross-section.

[0036] Figure 5 This is a schematic diagram of the expansion gap at the sealing ring position of a four-way valve sealing structure in an embodiment of this application.

[0037] Figure 6 This is a schematic diagram of the external component of a four-way valve sealing structure according to an embodiment of this application.

[0038] The component labels are as follows:

[0039] 1. Internal components; 11. Sealing ring; 111. Mounting groove; 112. Second groove; 12. Sealing ring; 121. First sealing part; 122. Second sealing part; 2. End cap; 21. Channel; 3. External components; 31. Limiting ring; 32. Pushing part; 33. Supporting part; 331. Support cantilever assembly; 332. First cantilever; 3321. First mounting hole; 3322. First support pin; 3323. First support pin cover plate; 333. Second cantilever; 3331. Second mounting hole; 3332. Second support pin; 3333. Second support pin cover plate; 334. First groove; 4. Expansion gap; 5. Injection groove. Detailed Implementation

[0040] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0041] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0042] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0043] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0044] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0045] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0046] This application discloses a sealing structure for a four-way valve. (Refer to...) Figure 1 , Figure 2 A four-way valve sealing structure includes an inner component 1, which is disposed on an end cap 2 and is slidably connected to the top wall of the end cap 2. The inner component 1 is used to seal the connection of the internal flow channel of the valve core, thereby reducing the outflow of the medium located inside the flow channel from the flow channel of the valve core after switching the flow channel.

[0047] An outer component 3 is provided on the outside of the inner component 1. The outer component 3 is used to support the inner component 1 on the end cover 2, thereby reducing the tilting caused by the inner component 1 partially falling into the hole 21 of the end cover 2 during the movement of the inner component 1 on the end cover 2, and further reducing the sealing failure or even damage caused by the tilting and suspension of the inner component 1.

[0048] In some embodiments, the internal component 1 includes a sealing mounting ring 11. The sealing mounting ring 11 has an annular structure, and its diameter is not less than the diameter of the channel 21 on the end cap 2. This allows the sealing mounting ring 11 to be stably positioned outside the channel 21 after being moved into place, and the sealing ring 12 inside the sealing mounting ring 11 seals the medium inside the channel 21. When the sealing mounting ring 11 is aligned with the opening on the end cap 2, the medium inside the valve core flow channel can enter the corresponding channel 21 on the end cap 2 through the sealing mounting ring 11.

[0049] Reference Figure 2 , Figure 3A mounting groove 111 is provided on the bottom wall of the sealing mounting ring 11. The bottom end of the mounting groove 111 is in communication with the outside. A sealing ring 12 is installed inside the mounting groove 111. The shape of the sealing ring 12 can be adapted to different sealing mounting ring shapes. The sealing ring 12 is coaxially arranged with the sealing mounting ring 11, and the bottom end of the sealing ring 12 extends out from the inside of the mounting groove 111, so that the bottom end of the sealing ring 12 can abut against and slide relative to the upper side wall of the end cover 2. Through the sealing ring 12 extending from the inside of the mounting groove 111, the communication between the flow channel inside the valve core and the hole 21 on the end cover 2 can be sealed, reducing the leakage of the medium inside the flow channel of the valve core caused by the rotation of the valve core.

[0050] In some embodiments, to prevent the sealing ring 12 from being squeezed out by high-pressure gas during use, a limiting ring 31 is coaxially provided on the bottom wall of the outer component 3, and the limiting ring 31 is fixedly connected to the outer component 3. A cavity is formed by a gap between the top wall of the limiting ring 31 and the bottom of the mounting groove 111, and the side wall of the sealing ring 12 extends into the cavity. That is, the radial width of the sealing ring 12 at the position opposite to the cavity is greater than the radial width of the bottom end of the sealing ring 12, so that the sealing ring 12 can be engaged inside the mounting groove 111, reducing the possibility of the sealing ring 12 falling off during use.

[0051] Reference Figures 3-5 In a specific embodiment, the cavity formed by the outer component 3, the limiting ring 31, and the sealing mounting ring 11 can be an "L" shaped structure, and the sealing ring 12 is an "L" shaped structure with the same shape as the cavity. In another specific embodiment, the cavity formed by the outer component 3, the limiting ring 31, and the sealing mounting ring 11 can be a "T" shaped structure, and the sealing ring 12 is a "T" shaped structure with the same shape as the cavity.

[0052] Among them, the "L"-shaped structure can better install the sealing ring 12 inside the cavity, and the "T"-shaped structure can provide better support and higher extrusion resistance.

[0053] Therefore, the sealing ring 12 includes a vertically arranged first sealing part 121 and a horizontally arranged second sealing part 122 located at the top of the first sealing part 121. The first sealing part 121 and the second sealing part 122 are fixedly connected. The first sealing part 121 extends from the bottom end of the sealing mounting ring 11. A limiting groove for engaging the limiting ring 31 is formed between the first sealing part 121 and the second sealing part 122, so that the limiting ring 31 can be engaged inside the limiting groove. The cooperation between the limiting ring 31 and the limiting groove reduces the possibility of the sealing ring 12 falling off.

[0054] In other embodiments, a method of metal welding followed by integral injection molding can also be used. Since there are no gaps within the injection-molded metal ring, the plastic needs to be modified to ensure a consistent coefficient of thermal expansion, thus preventing cracking. The outer component 3 has a first groove 334 on the side near the inner component 1, and the inner component 1 has a second groove 112 on the side near the outer component 3. The first groove 334 and the second groove 112 are positioned opposite each other. When the outer component 3 and the inner component 1 are relatively fixed, the first groove 334 and the second groove 112 communicate to form an injection molding groove 5. In a specific embodiment, the injection molding groove 5 has a "T"-shaped structure, and a sealing ring is formed inside the injection molding groove 5 through injection molding.

[0055] The top wall of the sealing ring 12 fits tightly against the bottom of the mounting groove 111, and the bottom wall of the second sealing part 122 of the sealing ring 12 abuts against the top wall of the limiting ring 31. A gap is left between the outer circumferential sidewall of the second sealing part 122 of the sealing ring 12 and the sidewall of the outer component 3 to form an expansion gap 4 for thermal expansion and contraction. In other embodiments, the sealing ring 12 is provided with an expansion gap 4 at intervals between its radial inner sidewall and the outer sidewall of the inner component 1.

[0056] Reference Figure 2 , Figure 6 The outer component 3 includes a pushing part 32 located outside the sealing mounting ring 11 and a supporting part 33 for supporting the movement of the pushing part 32. The pushing part 32 is sleeved on the outside of the sealing mounting ring 11 and is used to drive the sealing mounting ring 11 to move circumferentially. The supporting part 33 is fixed to the outside of the pushing part 32, and the bottom end of the supporting part 33 abuts against and is relatively slidably connected to the top wall of the end cover 2. The supporting part 33 provides stable support for the pushing part 32, and the pushing part 32 is supported on the end cover 2 by the supporting part 33, so that the axis of the inner component 1 and the axis of the channel 21 remain parallel, so that the supporting part 33 will not fall into the channel 21 on the end cover 2 during movement, thereby avoiding the situation of tilting and suspension during movement.

[0057] In some embodiments, the pushing part 32 has an annular structure and is sleeved on the outer side of the sealing mounting ring 11, and the pushing part 32 is fixedly connected to the outer side wall of the sealing mounting ring 11. The limiting ring 31 is fixedly installed on the bottom of the inner side wall of the pushing part 32, and the bottom wall of the limiting ring 31 is flush with the bottom wall of the pushing part 32.

[0058] In some embodiments, the support portion 33 is used to provide stable support for the movement of the push portion 32 on the end cover 2, reducing the possibility that the push portion 32 will partially fall into the interior of the channel 21 and become tilted or suspended during the movement of the push portion 32 on the end cover 2.

[0059] In some embodiments, the support portion 33 and the push portion 32 are integrally formed to enhance the connection strength between the support portion 33 and the push portion 32, and facilitate the synchronous movement of the support portion 33 and the push portion 32.

[0060] In other embodiments, the support part 33 and the push part 32 are separate structures, and the support part 33 and the push part 32 are separately molded parts. By welding the support part 33 and the push part 32 to form a fixed structure, the position of the push part 32 on the support part 33 or other connection forms can be selected for installation according to different needs.

[0061] In a specific embodiment, the support portion 33 may include at least one support cantilever. As the support cantilever moves with the push portion 32, it is at least partially positioned on the end cover 2. The support cantilever provides the foundation for supporting the movement of the push portion 32 on the end cover 2. The support cantilever is fixedly connected to the push portion 32, and its bottom end is slidably connected to the cover plate. During the movement of the push portion 32, the support cantilever remains in contact with the top wall of the end cover 2, thus providing stable support to the push portion 32.

[0062] In another embodiment, the support portion 33 may further include two sets of support cantilever groups 331 arranged opposite to each other. The ends of the support cantilever groups 331 are fixedly connected to the outer side wall of the push portion 32. The two sets of support cantilever groups 331 are symmetrically arranged with respect to the line AB connecting the center point A of the sealing ring 12 and the axis B of the rotation direction of the sealing ring 12.

[0063] The support cantilever assembly 331 includes a first cantilever 332 and a second cantilever 333. The first cantilever 332 extends from the pusher 32 toward the outer circumference, and the second cantilever 333 extends from the pusher 32 toward the valve core rotation center. The bottom end of the first cantilever 332 forms a first contact point with the cover plate for contact support, and the bottom end of the second cantilever 333 forms a second contact point with the cover plate for contact support. The line connecting the first contact point and the second contact point is located outside the sealing ring 12. In a specific embodiment, the line connecting the first contact point and the second contact point is tangent to the outer circle of the sealing ring 12.

[0064] The movement trajectory of the first contact point on the end cap 2 is offset from that of the hole 21 on the end cap 2, so that the movement of the first contact point on the end cap 2 can be stably supported by the end cap 2. Thus, the movement of the entire internal component 1 on the end cap 2 can be supported by the first contact point and the second contact point on the end cap 2, reducing the situation where some contact points fall into the hole 21 of the end cap 2 and become tilted and suspended during the movement.

[0065] In some embodiments, a first mounting hole 3321 is vertically provided at the position of the first cantilever 332 relative to the first contact point. The first mounting hole 3321 completely penetrates the side wall of the first cantilever 332, and a first support pin 3322 is provided inside the first mounting hole 3321. The bottom end of the first support pin 3322 extends from the bottom wall of the first cantilever 332, and the bottom wall of the first support pin 3322 abuts against and is relatively slidably connected to the top wall of the end cap 2. The first cantilever 332 is supported by the first support pin 3322.

[0066] The first cantilever 332 is provided with a first support pin cover plate 3323 above the first support pin 3322. The first support pin cover plate 3323 is used to enclose the first support pin 3322 inside the first mounting hole 3321, and the first support pin cover plate 3323 is fixedly connected to the first cantilever 332 to enclose the top wall of the first mounting hole 3321.

[0067] In some embodiments, a second mounting hole 3331 is vertically provided at the position of the second cantilever 333 relative to the second contact point. The second mounting hole 3331 completely penetrates the side wall of the second cantilever 333, and a second support pin 3332 is provided inside the second mounting hole 3331. The bottom end of the second support pin 3332 extends from the bottom wall of the second cantilever 333, and the bottom wall of the second support pin 3332 abuts against and is relatively slidably connected to the top wall of the end cap 2. The second cantilever 333 is supported by the second support pin 3332.

[0068] The second cantilever 333 is provided with a second support pin cover plate 3333 above the second support pin 3332. The second support pin cover plate 3333 is used to enclose the second support pin 3332 inside the second mounting hole 3331, and the second support pin cover plate 3333 is fixedly connected to the second cantilever 333 to enclose the top wall of the second mounting hole 3331.

[0069] Reference Figure 3 , Figure 4 In a specific embodiment, to prevent the first support pin 3322 and the second support pin 3332 from being squeezed out by high-pressure gas during use, the first mounting hole 3321 can be designed as a variable-diameter hole, with the top diameter of the first mounting hole 3321 being larger than the bottom diameter, forming a "T"-shaped structure. The shape of the first support pin 3322 inside the first mounting hole 3321 is also adapted to the shape of the first mounting hole 3321. Similarly, the second mounting hole 3331 can be designed as a variable-diameter hole, with the top diameter of the second mounting hole 3331 being larger than the bottom diameter, forming a "T"-shaped structure. The shape of the second support pin 3332 inside the second mounting hole 3331 is also adapted to the shape of the second mounting hole 3331.

[0070] Therefore, the first mounting hole 3321 includes a first through hole and a first limiting hole that are relatively connected. The first limiting hole is located above the first through hole, and the diameter of the first limiting hole is larger than the diameter of the first through hole. The first limiting hole and the first through hole form a "T"-shaped hole. The second mounting hole 3331 includes a second through hole and a second limiting hole that are relatively connected. The second limiting hole is located above the second through hole, and the diameter of the second limiting hole is larger than the diameter of the second through hole. The second limiting hole and the second through hole form a "T"-shaped hole.

[0071] In a specific embodiment, the outer component 3 includes a metal part and an injection molded part, which are fixedly connected to each other. The metal part may be a support part 33 and a push part 32, and the injection molded part may be a first support pin 3322 and a second support pin 3332 located at the first contact point and the second contact point.

[0072] To prevent the sealing ring 12 from rotating during movement, the opposing second cantilever 333 abuts against and rotates relative to the valve core. The contact points of the two opposing second cantilever 333 with the valve core are located on opposite sides of line AB connecting the center A of the sealing ring 12 and the axis B in the direction of rotation of the sealing ring 12. This allows the opposing second cantilever 333 to clamp the sidewall of the valve core, restricting the rotation of the sealing ring 12.

[0073] In a specific embodiment, the line connecting the two contact points of the opposing second cantilever 333 and the valve core is arranged along the radial direction of the valve core rotation axis. A gap is left between two adjacent second cantilever 333 to form a chamber. The chamber is used to engage with the outside of the valve core rotation axis, and the valve core rotation axis is engaged and rotated by the opposing two second cantilever 333, so that the internal component 1 can rotate along the central axis of the valve core rotation axis.

[0074] Furthermore, this application provides an electric four-way valve, including the four-way valve sealing structure mentioned above. The electric four-way valve includes a valve core located above the end cover 2. The valve core includes a first medium port and a second medium port, which are connected relative to each other. The valve core rotates relative to the end cover 2, and the rotation center axis of the valve core is coaxial with the rotation center axis of the inner component 1. The inner component 1 and the sealing ring 12 located below the inner component 1 move synchronously with the rotation of the valve core, so that the inner component 1 and the sealing ring 12 located below the inner component 1 can synchronously seal the gap between the valve core and the end cover 2. A drive structure for driving the valve core to rotate is provided above the valve core. The drive structure drives the valve core to rotate above the end cover 2 to switch the flow channel. A valve body is also provided outside the valve core. The valve body covers and encloses the entire structure, and the valve body is fixedly connected to the end cover 2, enclosing the internal structure inside the valve body and the end cover 2.

[0075] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0076] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A sealing structure for a four-way valve, characterized in that, Including: The inner component (1) and the outer component (3) are separately arranged, and a mounting groove (111) is formed between the inner component (1) and the outer component (3). A sealing ring (12) is installed in the mounting groove (111) and the bottom end of the sealing ring (12) extends from the bottom ends of the inner component (1) and the outer component (3).

2. The four-way valve sealing structure according to claim 1, characterized in that, The outer component (3) is sleeved on the outside of the inner component (1). The outer component (3) includes a pushing part (32) for moving the inner component (1) and a supporting part (33) for supporting the pushing part (32). When the inner component (1) partially covers the hole (21) on the end cap (2), the pushing part (32) can be supported on the end cap (2) by the supporting part (33) so that the axis of the inner component (1) and the axis of the hole (21) remain parallel.

3. The four-way valve sealing structure according to claim 2, characterized in that, The support part (33) includes two sets of support cantilever groups (331) arranged opposite to each other. The two sets of support cantilever groups (331) are symmetrical about the line connecting the center of the inner part (1) and the axis of rotation of the inner part (1).

4. The four-way valve sealing structure according to claim 2, characterized in that, The support part (33) and the push part (32) are independent components arranged separately, and the support part (33) and the push part (32) are fixedly connected to each other.

5. The four-way valve sealing structure according to claim 3, characterized in that, The support cantilever assembly (331) includes a first cantilever (332) and a second cantilever (333). The first cantilever (332) is provided with a first contact point that abuts against the end cap (2), and the second cantilever (333) is provided with a second contact point that abuts against the end cap (2). The inner component (1) is arranged in a circular shape, and the line connecting the first contact point and the second contact point is tangent to the outer circle of the inner component (1). Alternatively, the line connecting the first contact point and the second contact point is located outside the outer circle of the inner component (1).

6. The four-way valve sealing structure according to claim 5, characterized in that, The first cantilever (332) has a first mounting hole (3321) relative to the first contact point, and a first support pin (3322) passes through the first mounting hole (3321). The second cantilever (333) has a second mounting hole (3331) relative to the second contact point, and a second support pin (3332) passes through the second mounting hole (3331). The bottom end of the first support pin (3322) extends from the first cantilever (332) and abuts against the end cap (2) to form the first contact point. The bottom end of the second support pin (3332) extends from the second cantilever (333) and abuts against the end cap (2) to form the second contact point.

7. The four-way valve sealing structure according to claim 6, characterized in that, The first cantilever (332) is fixedly connected to the first support pin (3322) with a first support pin cover plate (3323), and the second cantilever (333) is fixedly connected to the second support pin (3332) with a second support pin cover plate (3333). The first mounting hole (3321) includes a first through hole and a first limiting hole that are relatively connected. The diameter of the first limiting hole is larger than the diameter of the first through hole. A first step is formed between the first limiting hole and the first through hole. The head of the first support pin (3322) is limited between the first step and the first support pin cover plate (3323). The second mounting hole (3331) includes a second through hole and a second limiting hole that are relatively connected. The diameter of the second limiting hole is larger than the diameter of the second through hole. A second step is formed between the second limiting hole and the second through hole. The head of the second support pin (3332) is limited between the second step and the second support pin cover plate (3333).

8. The four-way valve sealing structure according to claim 5, characterized in that, The two sets of second cantilever arms (333) abut against the side wall of the valve core rotation shaft and rotate relative to each other. The contact points of the two cantilever arms (333) and the valve core rotation shaft are respectively located on both sides of the line connecting the center of the inner component (1) and the axis of rotation of the inner component (1).

9. The four-way valve sealing structure according to claim 2, characterized in that, The internal component (1) includes a sealing mounting ring (11), and the sealing ring (12) is fixed on the sealing mounting ring (11). The bottom wall of the sealing ring (12) abuts against the side wall of the end cap (2).

10. The four-way valve sealing structure according to claim 9, characterized in that, The side wall of the sealing mounting ring (11) is provided with a mounting groove (111), and the inner side wall of the pushing part (32) is fixedly connected with a limiting ring (31). The inner wall of the mounting groove (111) away from the end cover (2) and the top wall of the limiting ring (31) abut against the sealing ring (12) and limit the axial movement of the sealing ring (12).

11. The four-way valve sealing structure according to claim 9, characterized in that, An expansion gap (4) is formed between the sealing ring (12) and the inner wall of the pusher (32) along the radial outer sidewall; or an expansion gap (4) is formed between the sealing ring (12) and the outer wall of the inner component (1) along the radial inner sidewall.

12. The four-way valve sealing structure according to claim 1, characterized in that, The outer component (3) has a first groove (334), and the inner component (1) has a second groove (112). When the inner component (1) and the outer component (3) are fixed, the first groove (334) and the second groove (112) form an injection molding groove (5), and the injection molding groove (5) contains a sealing ring (12) formed by injection molding.

13. An electric four-way valve, characterized in that, The electric four-way valve includes a four-way valve sealing structure as described in any one of claims 1-12, and further includes a valve core, wherein the inner component (1) is sleeved on one end of the valve core.

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