Multi-way valve

Abstract

The invention discloses a multi-way valve, relates to the technical field of multi-way valves, and solves the problems of low optionality and low space utilization rate of a multi-way scheme in the prior art. The valve comprises a valve seat, a main valve cavity is formed in the valve seat, and a rotatable valve element is arranged in the main valve cavity. The upper layer of the valve element is provided with a plurality of upper-layer flow channels, and the lower layer is provided with lower-layer flow channels. A connecting cavity and a plurality of side valve cavities are sequentially formed in the valve seat in the circumferential direction. Two ports of the connecting cavity are respectively communicated with the main valve cavity at the corresponding positions of the upper-layer flow channel and the lower-layer flow channel; the upper ports of the side valve cavities are respectively communicated with the main valve cavity at the corresponding positions of the upper-layer runner, and the lower ports of the side valve cavities are communicated with an outer ring valve port formed in the valve seat; the valve seat is provided with a plurality of inner ring valve ports used for being communicated with the lower-layer flow channel. The upper-layer flow channels are used for communicating the corresponding side valve cavities or communicating the corresponding side valve cavities with the corresponding connecting cavities, and the corresponding communicating relation between the side valve cavities and the upper-layer flow channels, the corresponding communicating relation between the connecting cavities and the upper-layer flow channels and the corresponding communicating relation between the lower-layer flow channels and the inner ring valve port can be changed by rotating the valve element.

Description

Technical Field

[0001] The present invention relates to the technical field of multi-way valves, in particular to a multi-way valve. Background Art

[0002] Conventional new energy electric vehicle thermal management systems have numerous components in their water circuits, often requiring multiple conventional three-way and four-way valves to switch between modes. This is not only costly but also requires numerous pipe connections, leading to a higher risk of failure and increasing the complexity of the vehicle layout. Multi-way valves, with their compact structure, can replace multiple conventional water valves, reducing overall system costs, reducing the risk of failure, and simplifying vehicle layout.

[0003] Chinese invention patent publication number CN117146010A discloses a multi-way valve comprising a valve body having a mounting cavity and a plurality of flow passages located radially outward of the mounting cavity and spaced apart circumferentially along the mounting cavity. An end surface of the valve body at one axial end has a plurality of first flow passage openings and second flow passage openings, each communicating with the plurality of flow passage openings. A circumferential wall of the mounting cavity has a third flow passage opening, each communicating with the plurality of flow passage openings. A valve core is rotatably disposed within the mounting cavity. The valve core comprises a first core segment and a second core segment, the first core segment being disposed on a side of the second core segment near the first flow passage openings. The first core segment has a plurality of mutually unconnected first passages, each communicating with at least two of the first flow passage openings. The second core segment has a plurality of mutually unconnected second passages, each communicating with at least two of the third flow passage openings. This multi-way valve has high space utilization, low flow resistance, and a compact size.

[0004] However, in this solution, multiple flow channel cavities can only be connected one by one, and there are few optional connection options. If additional optional options are to be added, the volume needs to be expanded. This limitation makes it difficult to flexibly adapt to the complex and changing requirements of thermal management systems, and it is impossible to fully utilize the advantages of the multi-way valve. Summary of the Invention

[0005] In view of the deficiencies in the above-mentioned background technology, the present invention proposes a multi-way valve, which solves the problems of low selectivity and low space utilization of multi-way solutions in the prior art.

[0006] The technical solution of the present invention is implemented as follows: a multi-way valve comprises a valve seat, a main valve chamber disposed within the valve seat, and a rotatable valve core disposed within the main valve chamber. The upper layer of the valve core is provided with a plurality of upper flow channels, and the lower layer is provided with a lower flow channel. A connecting chamber and a plurality of side valve chambers are sequentially disposed circumferentially on the valve seat. The two ports of the connecting chamber communicate with the main valve chamber at positions corresponding to the upper and lower flow channels, respectively. The upper ports of the side valve chambers communicate with the main valve chamber at positions corresponding to the upper flow channels, respectively, while the lower ports communicate with outer valve ports provided on the valve seat. The valve seat is provided with a plurality of inner valve ports for communicating with the lower flow channels. The upper flow channels are used to connect corresponding side valve chambers to one another or to the connecting chamber. Rotating the valve core can change the corresponding connections between the side valve chambers and the upper flow channels, between the connecting chambers and the upper flow channels, and between the lower flow channels and the inner valve ports.

[0007] Preferably, at least one outlet connected to the lower layer flow channel is provided at the bottom of the valve core, and the setting position of the outlet corresponds to the inner ring valve port. The outlet is used to communicate with at least one inner ring valve port in a one-to-one or many-to-one or many-to-many form, and rotating the valve core can change the corresponding communication relationship between the outlet and the inner ring valve port.

[0008] Preferably, the lower flow channel is an annular groove formed on the side wall of the valve core, which corresponds to the connecting cavity and is connected to the outlet. This design allows the fluid to be flexibly connected between different positions of the valve core, increasing the diversity of the connection schemes of the multi-way valve.

[0009] Preferably, an open annular gasket is provided between the sidewall of the valve core and the inner sidewall of the main valve cavity. The opening of the open annular gasket corresponds to the connecting cavity, and the open annular gasket is provided with a plurality of through holes I corresponding to the upper ports of the side valve cavities. The open annular gasket not only provides a seal but also ensures orderly fluid flow through the cooperation between the opening and the connecting cavity.

[0010] Preferably, a sealing gasket is provided between the bottom of the valve core and the bottom of the main valve cavity, and a through hole II is provided on the sealing gasket corresponding to the inner valve port. The provision of the sealing gasket further enhances the sealing performance of the multi-way valve and prevents fluid leakage.

[0011] Preferably, a rib I and a rib groove I are provided between the outer wall of the open annular gasket and the inner wall of the main valve cavity. The rib I and the rib groove I cooperate to limit the position of the open annular gasket between the main valve cavity and the open annular gasket. This limiting structure ensures the stability of the open annular gasket during operation of the multi-way valve, preventing it from displacement or loosening.

[0012] Preferably, a rib II and a rib groove II are provided between the sealing gasket and the inner wall of the main valve cavity. The rib II and the rib groove II cooperate to limit the position of the open annular gasket between the main valve cavity and the sealing gasket. This design is also applicable to the sealing gasket, ensuring its stability and sealing performance inside the multi-way valve.

[0013] Preferably, the inner valve opening and the outer valve opening are both arranged in a concentric circular array on the bottom surface of the valve seat. This arrangement makes the multi-way valve structure more compact and improves space utilization.

[0014] Preferably, the main valve chamber has an open top, covered by a cover plate with a through-hole III. The upper end of the valve core extends through through-hole III, with a sealing ring positioned between through-hole III and the valve core. The cover plate and sealing ring further enhance the overall sealing performance of the multi-way valve, ensuring reliable fluid transmission between the internal chambers.

[0015] Beneficial effects of the present invention: By cleverly designing the upper and lower flow channels on the valve core, and by connecting the upper and lower flow channels with the connecting cavity, side valve cavity, outer valve port, and inner valve port on the valve seat, a variety of connection schemes can be achieved. Among them, the upper flow channel can connect the corresponding side valve cavities with the side valve cavities or between the side valve cavities and the connecting cavity, and the connection relationship between the lower flow channel and the inner valve port can also be changed by rotating the valve core to achieve switching between different flow channel matching schemes, thereby achieving conversion of different fluid channels. Compared with the defect of the multi-way valve in the prior art that has few optional connection schemes, the multi-way valve of the present invention greatly increases the possibility and flexibility of connection, can meet the diverse needs of fluid paths under different working conditions, and improves the versatility and practicality of the multi-way valve.

[0016] The valve core utilizes a layered flow channel arrangement, with multiple upper flow channels arranged in the upper layer and lower flow channels arranged in the lower layer. The valve seat chambers and valve ports are compactly and rationally arranged. This allows for the functional integration of multiple flow channels and interfaces within a limited space, eliminating the existing requirement for multiple conventional three-way and four-way valves to switch between modes. This effectively reduces the overall space occupied by the multi-way valve, improves space utilization, simplifies vehicle layout, and reduces system complexity. The compact design also helps reduce space usage, improves space utilization, and enhances the product's market competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 This is a schematic diagram of the external three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention; Figure 3Schematic diagram of the valve seat structure of the present invention; Figure 4 Schematic diagram of the cross-sectional structure of the valve seat of the present invention; Figure 5 This is a schematic diagram of the three-dimensional structure of the valve core of the present invention; Figure 6 This is a schematic diagram of the cross-sectional structure of the upper layer of the valve core of the present invention; Figure 7 This is a schematic diagram of the bottom structure of the valve core of the present invention; Figure 8 This is a schematic diagram of the structure of the open circular ring gasket of the present invention; Figure 9 This is a schematic diagram of the sealing gasket structure of the present invention; Figure 10 This is a cross-sectional schematic diagram of the present invention when the valve core is at a 0° position; Figure 11 This is a cross-sectional schematic diagram of the valve core of the present invention when the valve core is at a 45° angle; Figure 12 This is a cross-sectional schematic diagram of the present invention when the valve core is at a 90° position; Figure 13 This is a cross-sectional schematic diagram of the present invention when the valve core is at a 135° angle; Figure 14 This is a cross-sectional schematic diagram of the present invention when the valve core is at a 180° position; Figure 15 This is a cross-sectional schematic diagram of the valve core of the present invention when the valve core is at a 225° position; Figure 16 This is a cross-sectional schematic diagram of the valve core of the present invention when the valve core is at a 270° position; Figure 17 This is a cross-sectional schematic diagram of the valve core of the present invention when the valve core is at a 315° angle; Figure 18 This is a schematic diagram of the cross-sectional structure of the upper layer of the second valve core of the present invention; Figure 19 This is a schematic diagram of the cross-sectional structure of the upper layer of the third valve core of the present invention; Figure 20 This is a schematic diagram of the second arrangement of the valve core bottom outlet of the present invention; Figure 21 This is a schematic diagram of the third arrangement of the valve core bottom outlet of the present invention; Figure 22 This is a schematic diagram of the fourth arrangement of the valve core bottom outlet of the present invention; In the figure: 1: valve seat; 2: main valve chamber; 3: valve core; 4: upper flow channel; 5: lower flow channel; 6: connecting chamber; 7: side valve chamber; 8: outer valve port; 9: inner valve port; 11: outlet; 13: open ring gasket; 14: through hole I; 15: sealing gasket; 16: through hole II; 17: convex rib I; 18: convex rib groove I; 19: convex rib II; 20: cover plate; 21: through hole III; 22: sealing ring. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0020] like Figure 1 、 2 As shown in Figure 3, embodiment 1, a multi-way valve, includes a valve seat 1, a main valve chamber 2 is provided in the valve seat 1, and a rotatable valve core 3 is provided in the main valve chamber 2. The upper layer of the valve core 3 is provided with a plurality of upper-layer flow channels 4, and the lower layer is provided with a lower-layer flow channel 5. A connecting chamber 6 and a plurality of side valve chambers 7 are sequentially provided on the circumferential direction of the valve seat 1. The two ports of the connecting chamber 6 are connected to the main valve chamber 2 at the corresponding positions of the upper-layer flow channel 4 and the lower-layer flow channel 5, respectively, and in this embodiment, before and after the rotation of the valve core 3, the lower port of the connecting chamber 6 is always connected to the lower-layer flow channel. The upper ports of the side valve chamber 7 are respectively connected to the main valve chamber 2 at the corresponding positions of the upper-layer flow channel 4, and the lower ports are connected to the outer ring valve port 8 opened on the valve seat 1.

[0021] The valve seat 1 is provided with a plurality of inner valve ports 9 for communicating with the lower flow channel 5. The upper flow channel 4 is used to connect the corresponding side valve chambers 7 to each other or to connect the side valve chambers 7 to the connecting chamber 6. By rotating the valve core 3, the corresponding connection relationship between the side valve chamber 7 and the upper flow channel 4, between the connecting chamber 6 and the upper flow channel 4, and between the lower flow channel 5 and the inner valve ports 9 can be changed, thereby switching between different flow channel matching schemes. In actual use, when the flow channel matching relationship needs to be changed, the valve core 3 is controlled to rotate, so that the upper flow channel 4 on the valve core 3 changes its position relative to the connecting chamber 6 and side valve chamber 7 on the valve seat 1, and the lower flow channel 5 changes its position relative to the inner valve ports 9, thereby redistributing and switching the fluid channels to meet the fluid control requirements under different operating conditions.

[0022] Specifically in this embodiment, the valve core is in the form of a cylinder as a whole. Figure 4 、 5As shown, the main valve cavity is a cylindrical cavity. The side valve cavity 7 includes seven side valve cavities: side valve cavity I 71, side valve cavity II 72, side valve cavity III 73, side valve cavity IV 74, side valve cavity V 75, side valve cavity VI 76, and side valve cavity VII 77. The outer valve ports 8 include seven outer valve ports: Ia, IIb, IIIc, IVd, Ve, VIf, and VIIg, which are arranged on the valve seat 1 corresponding to the lower ends of the side valve cavities 7. The inner valve ports 9 include Ih, IIi, IIIj, and IVk, for a total of four inner valve ports. The four inner valve ports 9 and the seven outer valve ports 8 are arranged in a concentric circular array on the bottom surface of the valve seat 1. This layout makes the structure of the multi-way valve more compact and improves space utilization.

[0023] like Figure 5 、 6 As shown, the upper flow channel 4 and the lower flow channel 5 on the valve core 3 are arranged in layers, and the layout of the chambers and valve ports on the valve seat 1 is reasonable and compact. The functional integration of multiple flow channels and interfaces is achieved in a limited space. Specifically, in this embodiment, there are four upper flow channels 4, namely fluid channel I 41, fluid channel II 42, fluid channel III 43, and fluid channel IV 44. The four upper flow channels 4 are arranged in parallel with each other, which can achieve two-to-two connections between the corresponding side valve chambers 7 and the side valve chambers 7, and between the side valve chambers 7 and the connecting chambers 6. When the valve core 3 is rotated, the two-to-two connection relationship can be switched. In actual use, the multi-way valve can realize the selection of connection schemes between 11 pipelines, with high selectivity and high space utilization.

[0024] In addition, if Figure 7 As shown, at least one outlet 11 is provided at the bottom of the valve core 3 for connecting the lower layer flow channel 5 with the inner ring valve port 9. The setting position of the outlet 11 corresponds to the inner ring valve port 9. The outlet 11 is used to communicate with at least one inner ring valve port 9 in a one-to-one or many-to-one or many-to-many form, and rotating the valve core 3 can change the corresponding communication relationship between the outlet 11 and the inner ring valve port 9, thereby realizing switching between different flow channel matching schemes.

[0025] Specifically in this embodiment, the lower flow channel 5 is an annular groove formed in the sidewall of the valve core 3, which corresponds to the connecting cavity 6 and is connected to the outlet 11. This design allows the lower flow channel to communicate with the connecting cavity regardless of the position of the valve core 3, thereby increasing the diversity of the communication options of the multi-way valve.

[0026] In this embodiment, a solution of setting one outlet 11 can realize a single-way communication between one inner valve port 9 and one outer valve port 8. According to the arrangement in this embodiment, Figures 10 to 17 As shown, the valve core can achieve the following working modes of the flow channel matching scheme in different positions: The multi-way valve of the present invention realizes multiple connection schemes by cleverly designing the upper flow channel and the lower flow channel on the valve core, and cooperating with the connecting cavity, side valve cavity, outer ring valve port and inner ring valve port on the valve seat, thereby meeting the diverse needs of fluid paths under different working conditions, improving space utilization, reducing system complexity and cost, having good sealing performance and reliability, and can be widely used in fields such as thermal management systems of new energy electric vehicles.

[0027] Example 2, a multi-way valve, based on Example 1, as Figure 8 As shown, an open annular gasket 13 is disposed between the side wall of the valve core 3 and the inner wall of the main valve chamber 2. The opening of the open annular gasket 13 corresponds to the connecting chamber 6. The open annular gasket 13 is provided with a plurality of through holes I 14 corresponding to the upper ports of the side valve chambers 7. In this embodiment, the open annular gasket 13 has a substantially C-shaped structure, with the open ends of the open annular gasket 13 contacting the outer walls of the connecting chamber 6 on either side to form a seal. The open annular gasket 13 not only provides a seal but also ensures the orderly flow of fluid through the cooperation between the open end and the connecting chamber 6.

[0028] In addition, if Figure 9 As shown, a sealing gasket 15 is provided between the bottom of the valve core 3 and the bottom of the main valve chamber 2. The sealing gasket 15 is provided with a through hole II 16 corresponding to the inner valve port 9. The provision of the sealing gasket 15 further enhances the sealing performance of the multi-way valve and prevents fluid leakage.

[0029] As a further specific embodiment, a rib I 17 and a rib groove I 18 are provided between the outer wall of the open annular gasket 13 and the inner wall of the main valve chamber 2. The rib I 17 and the rib groove I 18 cooperate to limit the position of the open annular gasket 13 between the main valve chamber 2 and the open annular gasket 13. This limiting structure, formed by the rib I 17 and the rib groove I 18, ensures the stability of the open annular gasket 13 during operation of the multi-way valve, especially before and after rotation of the valve core 3, preventing displacement or loosening.

[0030] In addition, a rib II 19 and a rib groove II are provided between the sealing gasket 15 and the inner wall of the main valve cavity. The rib II 19 and rib groove II cooperate to limit the position of the open annular gasket 13 between the main valve cavity 2 and the sealing gasket 15. The coordinated design of the rib II 19 and rib groove II restricts the position of the sealing gasket 15, preventing it from rotating as the valve core 3 rotates. This maintains the corresponding connection between the through hole II 16 and the inner valve port 9, ensuring its stability and sealing performance within the multi-way valve.

[0031] Example 3, a multi-way valve, based on Example 2, the main valve chamber 2 is open at the top, and the opening is covered with a cover plate 20, and the cover plate 20 is provided with a through hole III 21. The upper end of the valve core 3 passes through the through hole III 21, and a sealing ring 22 is provided between the through hole III 21 and the valve core 3 to prevent fluid leakage. The provision of the cover plate 20 and the sealing ring 22 further enhances the overall sealing performance of the multi-way valve, ensuring the reliable transmission of fluid between the internal chambers. In this embodiment, the cover plate and the main valve chamber can be optionally connected by bolts to facilitate the installation and maintenance of the valve core, and a rubber seal is provided at the connection surface between the cover plate and the main valve chamber to meet the sealing requirements. In addition, as another optional option, welding is used to connect the valve core cover plate and the main valve chamber to improve the sealing performance and high-pressure resistance.

[0032] As a further optional implementation scheme, in actual use, in order to realize the rotation of the valve core, a driving motor is used for driving, and a gear is set at the outer end of the main shaft of the valve core 3. The gear on the output shaft of the driving motor is meshed with each other to form a gear pair to realize transmission, thereby achieving the purpose of using the driving motor to drive the valve core to rotate and switching between different flow channel schemes.

[0033] Example 4, a multi-way valve, based on Example 3, is different from Example 1 in that Figure 19 As shown, in this embodiment, a cross-shaped partition is provided in the middle of the valve core at the corresponding position of the upper flow channel. This cross-shaped partition divides the valve core into four circumferentially distributed fluid channels I 41, II 42, III 43, and IV 44. In actual use, fluid channels I 41, II 42, III 43, and IV 44 are used to connect adjacent side valve cavities or side valve cavities to the connecting cavity in pairs. Rotating the valve core can switch the connection between different adjacent side valve cavities or between adjacent side valve cavities and the connecting cavity, meeting actual usage requirements.

[0034] As another optional implementation, different from the above embodiment, if Figure 18 As shown, a T-shaped partition is provided in the middle of the valve core at the corresponding position of the upper flow channel, and a straight partition is provided on one side of the T-shaped partition. The T-shaped partition and the straight partition cooperate to separate the valve core into fluid channel I 41, fluid channel II 42, fluid channel III 43, and fluid channel IV 44, thereby realizing the connection between a pair of opposite side valve chambers or the side valve chamber and the connecting chamber, and at the same time realizing the connection between three pairs of adjacent side valve chambers and side valve chambers or between side valve chambers and connecting chambers in pairs.

[0035] As another optional embodiment, the outlet size on the valve core is half of the inner ring valve port 9. Before and after rotating 45°, the outlet can always be connected to the same inner ring valve port, and can only be connected to other inner ring valve ports after rotating 90°.

[0036] As another optional solution, multiple outlets can be provided, which can be opened on the bottom surface of the valve core in a distributed manner. Figure 20 、 21 As shown, if there are two optional settings, the lower layer flow channel can be connected to the two inner circle valve ports through the two outlets at the same time. Figure 22 As shown, if three outlets are optionally provided, the lower flow channel can be connected to the three inner valve ports simultaneously through the three outlets. By providing different numbers and positions of outlets, the goal of connecting one outer valve port to different numbers of inner valve ports in a one-to-many manner can be achieved, thus providing more connection solutions.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A multi-way valve, comprising a valve seat (1), wherein a main valve cavity (2) is provided in the valve seat (1), and a rotatable valve core (3) is provided in the main valve cavity (2), characterized in that: The upper layer of the valve core (3) is provided with a plurality of upper flow channels (4), the lower layer is provided with a lower flow channel (5), and the valve seat (1) is provided with a connecting cavity (6) and a plurality of side valve cavities (7) in sequence in the circumferential direction. The two ports of the connecting chamber (6) are respectively connected to the main valve chamber (2) at corresponding positions of the upper flow channel (4) and the lower flow channel (5); the upper ports of the side valve chamber (7) are respectively connected to the main valve chamber (2) at corresponding positions of the upper flow channel (4), and the lower ports are connected to the outer ring valve port (8) provided on the valve seat (1); the valve seat (1) is provided with a plurality of inner ring valve ports (9) for communicating with the lower flow channel (5); The upper flow channel (4) is used to connect the corresponding side valve chambers (7) to the side valve chambers (7) or between the side valve chambers (7) and the connecting chamber (6). By rotating the valve core (3), the corresponding communication relationship between the side valve chamber (7) and the upper flow channel (4), between the connecting chamber (6) and the upper flow channel (4), and between the lower flow channel (5) and the inner valve port (9) can be changed.

2. The multi-way valve according to claim 1, characterized in that: The bottom of the valve core (3) is provided with at least one outlet (11) communicating with the lower layer flow channel (5), and the setting position of the outlet (11) corresponds to the inner ring valve port (9). The outlet (11) is used to communicate with at least one inner ring valve port (9) in a one-to-one or many-to-one or many-to-many manner, and the corresponding communication relationship between the outlet (11) and the inner ring valve port (9) can be changed by rotating the valve core (3).

3. The multi-way valve according to claim 2, characterized in that: The lower flow channel (5) is an annular groove formed on the side wall of the valve core (3), the annular groove corresponding to the connecting cavity (6) and communicating with the outlet (11).

4. The multi-way valve according to claim 3, characterized in that: An open circular ring gasket (13) is provided between the side wall of the valve core (3) and the inner side wall of the main valve cavity (2), the opening of the open circular ring gasket (13) corresponding to the connecting cavity (6), and a plurality of through holes I (14) corresponding to the upper ports of the side valve cavity (7) are provided on the open circular ring gasket (13).

5. The multi-way valve according to claim 4, characterized in that: A sealing gasket (15) is provided between the bottom of the valve core (3) and the bottom of the main valve chamber (2), and a through hole II (16) corresponding to the inner ring valve port (9) is provided on the sealing gasket (15).

6. The multi-way valve according to claim 5, characterized in that: A convex rib I (17) and a convex rib groove I (18) are provided between the outer wall of the open circular ring gasket (13) and the inner wall of the main valve cavity (2). The convex rib I (17) and the convex rib groove I (18) cooperate to limit the position of the open circular ring gasket (13) between the main valve cavity (2) and the open circular ring gasket (13).

7. The multi-way valve according to claim 5, characterized in that: A convex rib II (19) and a convex rib groove II are provided between the sealing gasket (15) and the inner wall of the main valve cavity. The convex rib II (19) and the convex rib groove II cooperate to limit the position of the open circular ring gasket (13) between the main valve cavity (2) and the sealing gasket (15).

8. The multi-way valve according to any one of claims 1 to 7, characterized in that: The inner valve opening (9) and the outer valve opening (8) are both arranged in a concentric circular array on the bottom surface of the valve seat (1).

9. The multi-way valve according to claim 8, characterized in that: The main valve cavity (2) has an opening at the top, and a cover plate (20) covers the opening, and a through hole III (21) is provided on the cover plate (20).

10. The multi-way valve according to claim 9, characterized in that: A through hole III (21) is formed through the upper end of the valve core (3), and a sealing ring (22) is provided between the through hole III (21) and the valve core (3).

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