Valve element structure and multi-way valve

Abstract

The utility model provides a valve core structure and a multi-way valve, the valve core structure is rotatably arranged in a valve body of the multi-way valve and is provided with a plurality of circulation channels which are arranged at intervals, each circulation channel comprises a circulation cavity and a circulation port which is communicated with two ends of the circulation cavity, the force of fluid in part of the circulation cavity acting on the valve core structure is F1, the force of the fluid in the other part of the circulation cavity acting on the valve element structure is F2, and the F1 and the F2 are opposite in direction, so that the overall stress of the valve element structure is balanced. By the adoption of the scheme, the impact force of fluid passing through the valve element structure on the valve element structure is from top to bottom, stress balance of the valve element structure can be kept, and the problems that in the prior art, the directions of the fluid impact force borne by the valve element structure are the same, and the valve element structure is likely to move or be jacked up due to unbalanced stress are solved. And therefore, the internal stress balance of the valve core structure when the fluid flows through the valve core structure is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of multi-way valves, in particular to a valve core structure and a multi-way valve. Background Art

[0002] The multi-way valve in the prior art includes a valve body and a valve core. The fluid entering the valve body impacts the valve core. The impact force of the fluid causes the valve core to be subjected to unbalanced force. Under the force of the fluid, the valve core is prone to positional movement, which reduces the sealing performance between the valve core and the valve body. How to reduce the instability of the force on the valve core is a technical problem to be solved by this application. Utility Model Content

[0003] The utility model provides a valve core structure and a multi-way valve to solve the problem in the prior art that the valve core structure is subjected to fluid impact forces in the same direction and the valve core structure is easily moved or lifted, thereby causing the multi-way valve to easily leak internally.

[0004] In order to solve the above problems, according to one aspect of the utility model, the utility model provides a valve core structure, the valve core structure has a plurality of flow channels spaced apart from each other, the flow channels include a flow cavity and a flow port connected to both ends of the flow cavity, the force acting on the valve core structure by the fluid in part of the flow cavity is F1, and the force acting on the valve core structure by the fluid in another part of the flow cavity is F2, and the directions of F1 and F2 are opposite.

[0005] Furthermore, the flow openings of multiple flow channels are all located at the bottom of the valve core structure and distributed along the circumference of the valve core structure, the top of part of the flow cavity is the bottom wall of the cavity, and the bottom is an opening connected to the flow opening; the bottom of another part of the flow cavity is the bottom wall of the cavity where the flow opening is located, and the top is an opening; the fluid flowing through the part of the flow cavity with the bottom opening applies an upward thrust to the valve core structure, and the fluid flowing through the other part of the flow cavity with the top opening applies a downward pressure on the valve core structure.

[0006] Furthermore, the multiple circulation channels include a first circulation channel and a second circulation channel, the valve core structure has an inner cavity and an outer cavity spaced apart from each other, the circulation port of the first circulation channel and the circulation port of the second circulation channel are both arranged at the bottom of the valve core structure corresponding to the outer cavity, the circulation cavity of the first circulation channel is formed by the inner cavity and the outer cavity, the top of the inner cavity and the top of the outer cavity are both the bottom wall of the cavity of the circulation cavity, the bottom of the inner cavity is an opening, and the bottom of the outer cavity is opposite to the circulation port; the circulation cavity of the second circulation channel is formed by the outer cavity, the bottom of the outer cavity is the bottom wall of the cavity where the circulation port is located, and the top is an opening.

[0007] Furthermore, the valve core structure includes an inner cylinder, a middle cylinder, an outer cylinder and a plurality of radial partitions, the area between the inner cylinder and the middle cylinder forms an inner cavity, the area between the middle cylinder and the outer cylinder forms an outer cavity, the radial partitions are arranged between the middle cylinder and the outer cylinder along the circumferential direction of the valve core structure and divide the outer cavity into a plurality of sub-cavities with opposite opening directions, wherein the two sub-cavities of the flow cavity for forming the first flow channel are spaced in the circumferential direction of the valve core structure, the bottoms of the sub-cavities are opposite to the flow ports, the tops of the sub-cavities are the bottom walls of the cavity of the first flow channel; and the openings are upward, the sub-cavity of the flow cavity for forming the second flow channel is one and the top of the sub-cavity is open, and the bottom includes the bottom wall of the cavity between the two flow ports of the second flow channel.

[0008] Furthermore, the valve core structure also includes a top plate and a bottom plate. The top plate is arranged at the top openings of the outer cavity and the inner cavity, and the bottom plate is arranged at the bottom opening of the outer cavity. The radial partition plate is respectively connected to the top plate and the bottom plate at both ends along the axial direction of the valve core structure. Multiple flow ports are arranged on the bottom plate. The top plate forms the bottom wall of the flow cavity of the first flow channel, and the bottom plate is used to form the bottom wall of the flow cavity of the second flow channel.

[0009] Further, the first circulation channel and the second circulation channel are located at the same height of the valve core structure.

[0010] Furthermore, the valve core structure also has a plurality of weight-reducing cavities with top openings, and the weight-reducing cavities are arranged to avoid the flow cavity of the first flow channel and the flow cavity of the second flow channel.

[0011] According to another aspect of the utility model, a multi-way valve is provided, which includes a valve body, a valve core sealing gasket, an executive drive assembly and the above-mentioned valve core structure. The bottom of the valve body has a plurality of flow holes distributed along the circumferential direction. The valve core structure is arranged at the bottom of the cavity of the valve body. Any flow port corresponds to a flow hole. The valve core sealing gasket is arranged between the valve body and the valve core structure. The executive drive assembly is arranged on the valve body and is connected to the valve core structure to drive the valve core structure to rotate and adjust the flow condition of the multi-way valve.

[0012] Further, at least one top-opened flow cavity is communicated with the cavity of the valve body.

[0013] Furthermore, the inner cylinder of the valve core structure has a guide limit groove with an opening facing upward, and the driving shaft of the execution drive assembly is inserted into the guide limit groove and is clamped with the inner cylinder.

[0014] By applying the technical solution of the utility model, a valve core structure with a plurality of mutually spaced flow channels is provided, wherein the flow channel comprises a flow cavity and a flow port connected to both ends of the flow cavity, wherein the force exerted on the valve core structure by the fluid in part of the flow cavity is F1, and the force exerted on the valve core structure by the fluid in another part of the flow cavity is F2, and the directions of F1 and F2 are opposite.

[0015] By adopting this solution, the directions of the impact force of the fluid passing through the valve core structure on the valve core structure are upward and downward, which is beneficial to maintaining the force balance of the valve core structure, avoiding the situation in the prior art where the directions of the fluid impact forces on the valve core structure are the same and the valve core structure is easily subjected to unbalanced force, resulting in movement or lifting, which in turn leads to internal leakage in the multi-way valve, thereby achieving internal force balance inside the valve core structure when the fluid flows through it. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 A schematic structural diagram of a valve core structure provided by an embodiment of the utility model is shown;

[0018] Figure 2 Shows Figure 1 A schematic diagram of the structure of the valve core structure from another perspective;

[0019] Figure 3 Shows Figure 1 A bottom view of the valve core structure;

[0020] Figure 4 Shows Figure 1 A top view of the valve core structure;

[0021] Figure 5 A schematic structural diagram of a multi-way valve provided in another embodiment of the utility model is shown;

[0022] Figure 6 Shows Figure 5 A cross-sectional view of a multi-way valve;

[0023] Figure 7 Shows Figure 5 Bottom view of the multi-way valve.

[0024] The above drawings include the following reference numerals:

[0025] 10. Valve core structure; 101. First circulation channel; 1011. First circulation cavity; 1012. First circulation port; 102. Second circulation channel; 1021. Second circulation cavity; 1022. Second circulation port; 103. Weight reduction cavity; 11. Inner cylinder; 111. Guide limit groove; 12. Middle cylinder; 13. Outer cylinder; 14. Radial partition; 15. Top plate; 16. Bottom plate;

[0026] 20. valve body; 201. flow hole;

[0027] 30. Valve core sealing gasket;

[0028] 40. Execute drive assembly; 41. Drive shaft. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0030] like Figures 1 to 4 As shown, an embodiment of the utility model provides a valve core structure 10, which is rotatably arranged in the valve body 20 of the multi-way valve and has a plurality of mutually spaced flow channels, the flow channels include a flow cavity and a flow port connected to both ends of the flow cavity, the force acting on the valve core structure by the fluid in part of the flow cavity is F1, and the force acting on the valve core structure by the fluid in another part of the flow cavity is F2, and F1 is opposite to F2. Specifically, the flow ports of the plurality of flow channels are all located at the bottom of the valve core structure 10 and distributed along the circumference of the valve core structure 10, the top of part of the flow cavity is the cavity bottom wall, and the bottom is the opening connected to the flow port, that is, the opening faces downward. The bottom of another part of the flow cavity is the cavity bottom wall where the flow port is located, and the top is the opening, that is, the opening faces upward. The bottom wall of the part of the flow cavity with the opening facing downward is located above the opening of its flow cavity. The cavity bottom wall of the other part of the flow cavity with the opening facing upward is located below the opening of its flow cavity. That is, the cavity bottom walls of the two parts of the flow cavity are arranged opposite to the opening positions of their respective flow cavities in the axial direction of the valve core structure 10. The fluid flowing through the portion of the flow cavity opening downward exerts an upward thrust on the valve core structure 10 , and the fluid flowing through the other portion of the flow cavity opening upward exerts a downward pressure on the valve core structure 10 , so that the overall force of the valve core structure 10 is balanced.

[0031] In this embodiment, the bottom walls of the two parts of the flow channels are arranged in opposite positions relative to the openings of their respective flow cavities, so that the directions of the impact force of the fluid passing through the valve core structure 10 on the valve core structure 10 are upward and downward, which is beneficial to maintaining the force balance of the valve core structure, avoiding the situation in the prior art that the directions of the fluid impact forces on the valve core structure 10 are the same and the valve core structure 10 is easily unbalanced and moved or lifted, which further causes the multi-way valve to be prone to internal leakage, thereby achieving internal force balance inside the valve core structure 10 when the fluid flows through it.

[0032] like Figures 1 to 4As shown, the plurality of circulation channels include a first circulation channel 101 and a second circulation channel 102, the valve core structure 10 has an inner cavity and an outer cavity spaced apart from each other, the circulation opening of the first circulation channel 101 and the circulation opening of the second circulation channel 102 are both arranged at the bottom of the valve core structure 10 corresponding to the outer cavity, and the circulation cavity of the first circulation channel 101 is formed by the inner cavity and the outer cavity. The top of the inner cavity and the top of the outer cavity are both the cavity bottom wall of the circulation cavity, the bottom of the inner cavity is an opening, and the bottom of the outer cavity is directly opposite to the circulation opening. The circulation cavity of the second circulation channel 102 is formed by the outer cavity with an opening facing upward, the bottom of the outer cavity is the cavity bottom wall where the circulation opening is located, and the top is an opening.

[0033] In this embodiment, the first circulation channel 101 includes a first circulation cavity 1011 and two first circulation ports 1012 connected to the two ends of the first circulation cavity 1011, and the second circulation channel 102 includes a second circulation cavity 1021 and two second circulation ports 1022 connected to the two ends of the second circulation cavity 1021. The opening of the first circulation cavity 1011 is downward, and the opening of the second circulation cavity 1021 is upward. In this embodiment, the first circulation cavity 1011 is composed of an outer cavity and an inner cavity, and the second circulation cavity 1021 is only composed of an outer cavity, which is conducive to ensuring the spacing effect between the first circulation cavity 1011 and the second circulation cavity 1021 and the structural strength of the valve core structure 10, and is also conducive to the design of the reverse opening of the two circulation cavities. The first circulation channel 101 is a groove-shaped channel with the top as the bottom wall of the cavity and the bottom as a completely open channel. The impact force of the fluid in the first circulation channel 101 on the valve core structure 10 is always upward. The second circulation cavity 1021 is completely open at the top and has a groove-shaped channel on the bottom wall of the cavity. The impact force of the fluid in the second circulation cavity 1021 on the valve core structure 10 is always downward.

[0034] like Figures 1 to 4 As shown, the valve core structure 10 includes an inner cylinder 11, a middle cylinder 12, an outer cylinder 13 and a plurality of radial partitions 14. The area between the inner cylinder 11 and the middle cylinder 12 forms an inner cavity, and the area between the middle cylinder 12 and the outer cylinder 13 forms an outer cavity. The radial partitions 14 are arranged between the middle cylinder 12 and the outer cylinder 13 along the circumference of the valve core structure 10 and divide the outer cavity into a plurality of sub-cavities with opposite opening directions, wherein the two sub-cavities used to form the flow cavity of the first flow channel 101 are spaced in the circumference of the valve core structure 10, and the bottom of the sub-cavities are both opposite to the flow opening, and the top is the bottom wall of the cavity of the first flow channel 101. There is one sub-cavity used to form the flow cavity of the second flow channel 102, and the top of the sub-cavity is open, and the bottom includes the cavity bottom wall located between the two flow openings.

[0035] Such an arrangement facilitates the formation of the inner cavity, the outer cavity, and the multi-section sub-cavities of the outer cavity, and is also conducive to the formation of the first circulation cavity 1011 and the second circulation cavity 1021. Specifically, the valve core structure 10 in this embodiment is divided into a plurality of sectors at equal angles (40°) along the circumference, and the sub-cavity between any two adjacent radial partitions corresponds to at least one sector, wherein the two sub-cavities used to form the first circulation cavity 1011 in this embodiment correspond to one sector respectively, and one sector is arranged across the two sub-cavities, the inner cavity is an annular cavity, and the two sub-cavities are respectively connected to the inner cavity at different positions in the circumference, so as to connect the two sub-cavities through the inner cavity and form the first circulation cavity 1011 together; the sub-cavity used to form the second circulation cavity 1021 includes three consecutively adjacent sectors, and the three sectors are connected in sequence.

[0036] Furthermore, the valve core structure 10 also includes a top plate 15 and a bottom plate 16. The top plate 15 is arranged at the top openings of the outer cavity and the inner cavity, and the bottom plate 16 is arranged at the bottom opening of the outer cavity. The radial partition plate 14 is respectively connected to the top plate 15 and the bottom plate 16 at both ends along the axial direction of the valve core structure 10. Multiple flow ports are arranged on the bottom plate 16. The top plate 15 forms the bottom wall of the flow cavity of the first flow channel 101, and the bottom plate 16 is used to form the bottom wall of the flow cavity of the second flow channel 102. This arrangement facilitates the molding of the bottom walls of the first flow cavity 1011 and the second flow cavity 1021, and ensures the balanced impact effect of the fluid on the valve core structure 10 as a whole. Specifically, the top plate 15 in this embodiment forms the bottom wall of all the inner cavities and sub-cavities of the outer cavity that open downward, and the bottom plate 16 avoids the part of the multiple flow ports to form the bottom wall of all the sub-cavities of the outer cavity that open upward. Figures 1 to 4 As shown, the second circulation cavity 1021 (second circulation channel 102) is arranged across three fan-shaped areas, and a bottom plate 16 for forming the bottom wall of the cavity of the second circulation cavity 1021 is arranged at the bottom of the sub-cavity corresponding to the middle fan-shaped area, and the two second circulation ports 1022 of the second circulation channel 102 correspond to the two left and right fan-shaped areas respectively below the sub-cavities; the first circulation cavity 1011 (first circulation channel 101) is arranged across four fan-shaped areas, and a top plate 15 is arranged at the top of the four fan-shaped areas, a bottom plate 16 is arranged at the bottom of the sub-cavities corresponding to the two middle fan-shaped areas, and the two second circulation ports 1022 of the first circulation channel 101 correspond to the two second fan-shaped areas at the left and right ends respectively below the sub-cavities corresponding to the two second circulation ports 1022 of the first circulation channel 101.

[0037] In this embodiment, except for the sub-cavities used to form the first circulation cavity 1011 and the second circulation cavity 1021, the openings of the remaining sub-cavities are all upward and the bottom wall of the cavity is formed by the bottom plate 16. In this way, at most one side of any sector area on both sides of the axial direction of the valve core structure 10 is blocked by the top plate 15 or the bottom plate 16, which is conducive to achieving lightweight of the valve core structure 10.

[0038] In summary, the first circulation cavity 1011 of the first circulation channel 101 is a strip groove-shaped cavity formed by an inner cavity, two outer cavities opening downward and the top plate 15. The two first circulation ports 1012 communicating with the two ends of the first circulation cavity 1011 are arranged on the bottom plate 16 and are respectively communicated with the two outer cavities opening downward. The impact force of the fluid in the first circulation channel 101 on the valve core structure 10 acts on the top plate 15, and the impact force on the valve core structure 10 is always upward. The second circulation cavity 1021 of the second circulation channel 102 is a strip groove-shaped cavity formed by an outer cavity spanning three fan-shaped areas and opening upward and the bottom plate 16. The two second circulation ports 1022 communicating with the two ends of the second circulation cavity 1021 are both arranged on the bottom plate 16 and are respectively arranged corresponding to the two spaced fan-shaped areas used to form the second circulation cavity 1021. The impact force of the fluid in the second circulation channel 102 on the valve core structure 10 acts on the bottom plate 16, and the impact force on the valve core structure 10 is always downward.

[0039] In this embodiment, the first circulation channel 101 and the second circulation channel 102 are located at the same height of the valve core structure 10. This arrangement is conducive to miniaturization of the valve core structure 10 and avoids the situation where the valve core structure 10 needs to be multi-layered to design multiple circulation channels.

[0040] Preferably, the valve core structure 10 also has a plurality of weight-reducing cavities 103 with top openings, and the weight-reducing cavities 103 are arranged to avoid the flow cavity of the first flow channel 101 and the flow cavity of the second flow channel 102. Such an arrangement is conducive to achieving the lightweight of the valve core structure 10. Among them, the weight-reducing cavity 103 in this embodiment is the other sub-cavities except the sub-cavities used to form the first flow cavity 1011 and the second flow cavity 1021.

[0041] like Figures 5 to 7 As shown, another embodiment of the utility model provides a multi-way valve, which includes a valve body 20, a valve core sealing gasket 30, an actuator drive assembly 40 and the above-mentioned valve core structure 10. The bottom of the valve body 20 has a plurality of flow holes 201 distributed along the circumferential direction. The valve core structure 10 is arranged at the bottom of the cavity of the valve body 20. Any flow port corresponds to a flow hole 201. The valve core sealing gasket 30 is arranged between the valve body 20 and the valve core structure 10. The actuator drive assembly 40 is arranged on the valve body 20 and is driven and connected to the valve core structure 10 to drive the valve core structure 10 to rotate and adjust the flow condition of the multi-way valve.

[0042] In this embodiment, the valve core sealing gasket 30 is used to seal the valve body 20 and the valve core structure 10, so as to avoid leakage of fluid from the gap between the flow port and the flow hole, which may cause internal leakage of the multi-way valve. The valve core structure 10 is driven to rotate by the actuator drive assembly 40 and the correspondence between the multiple flow channels and the multiple flow holes 201 is adjusted to adjust the flow condition of the multi-way valve. Furthermore, the valve core structure 10 of this embodiment makes the impact force of the fluid passing through the valve core structure 10 on the valve core structure 10 have up and down directions, so as to achieve internal force balance inside the valve core structure 10 when the fluid flows through it.

[0043] Specifically, at least one of the circulation cavities with a top opening is connected to the cavity of the valve body 20, and the remaining circulation cavities are spaced from the cavity of the valve body 20. This arrangement is conducive to designing the internal balance channel of the valve core structure 10 according to actual conditions. In this embodiment, the opening of the second circulation cavity 1021 of the second circulation channel 102 is upward and connected to the cavity of the valve body 20. Since the opening of the sub-cavity used to form the second circulation cavity 1021 is upward, that is, there is no top plate 15 to stop the top of the second circulation cavity 1021, the fluid enters from one of the second circulation ports 1022 and moves upward to the second circulation cavity 1021. Since there is no stopper at the top of the second circulation cavity 1021, the upward flow of the fluid will not be stopped, and no force to push the valve core structure 10 as a whole will be generated. After that, the fluid will flow to another second circulation port 1022 and flow out from another second circulation port 1022 under the action of its own weight and the guiding action of the second circulation cavity 1021. During this process, the fluid in the second circulation chamber 1021 will generate downward pressure on the bottom wall (bottom plate 16) of the second circulation chamber 1021 located between the two second circulation ports 1022. This partial pressure will be balanced with the upward thrust on the valve core structure 10 as a whole generated by the first circulation channel 101. It can be understood that, in one embodiment, the first circulation channel 101 only generates a force to push the valve core structure 10 upward, and the second circulation channel 102 only generates a force to press the valve core structure 10 downward.

[0044] like Figure 2 and Figure 6 As shown, the inner cylinder 11 of the valve core structure 10 has a guide limit groove 111 with an opening facing upward, and the driving shaft 41 of the actuator drive assembly 40 is inserted into the guide limit groove 111 and is engaged with the inner cylinder 11. This arrangement ensures the coaxiality of the valve core structure 10 and the driving shaft 41 of the actuator drive assembly 40, and facilitates the rotation drive of the valve core structure 10.

[0045] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0046] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0047] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0048] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0049] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0050] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A valve core structure, characterized in that: The valve core structure has a plurality of flow channels spaced apart from each other, and the flow channels include a flow cavity and a flow port connected to both ends of the flow cavity. A force F1 is exerted on the valve core structure by the fluid in part of the flow cavity, and a force F2 is exerted on the valve core structure by the fluid in another part of the flow cavity, and the directions of F1 and F2 are opposite.

2. The valve core structure according to claim 1, characterized in that: The flow openings of the plurality of flow channels are all located at the bottom of the valve core structure and are distributed along the circumference of the valve core structure; the top of some of the flow cavities is the bottom wall of the cavity, and the bottom is an opening connected to the flow opening; the bottom of another part of the flow cavities is the bottom wall of the cavity where the flow opening is located, and the top is an opening; The fluid in the portion of the circulation chamber that flows through the bottom opening applies an upward thrust to the valve core structure, and the fluid in the other portion of the circulation chamber that flows through the top opening applies a downward pressure to the valve core structure.

3. The valve core structure according to claim 1, characterized in that: The plurality of circulation channels include a first circulation channel (101) and a second circulation channel (102); the valve core structure has an inner cavity and an outer cavity spaced apart from each other; the circulation opening of the first circulation channel (101) and the circulation opening of the second circulation channel (102) are both arranged at the bottom of the valve core structure corresponding to the outer cavity; the circulation cavity of the first circulation channel (101) is formed by the inner cavity and the outer cavity; the top of the inner cavity and the top of the outer cavity are both the cavity bottom wall of the circulation cavity; the bottom of the inner cavity is an opening; and the bottom of the outer cavity is directly opposite to the circulation opening; The flow cavity of the second flow channel (102) is formed by the outer cavity, the bottom of the outer cavity is the cavity bottom wall where the flow port is located, and the top is an opening.

4. The valve core structure according to claim 3, characterized in that: The valve core structure comprises an inner cylinder (11), a middle cylinder (12), an outer cylinder (13) and a plurality of radial partitions (14); the area between the inner cylinder (11) and the middle cylinder (12) forms the inner cavity; the area between the middle cylinder (12) and the outer cylinder (13) forms the outer cavity; the radial partitions (14) are arranged between the middle cylinder (12) and the outer cylinder (13) along the circumferential direction of the valve core structure and partition the outer cavity into a plurality of sub-cavities with opposite opening directions, wherein the two sub-cavities for forming the circulation cavity of the first circulation channel (101) are spaced in the circumferential direction of the valve core structure, the bottoms of the sub-cavities are opposite to the circulation ports, and the tops of the sub-cavities are the bottom walls of the cavity of the first circulation channel (101); the sub-cavity for forming the circulation cavity of the second circulation channel (102) is one, the top of the sub-cavity is open, and the bottom comprises the bottom wall of the cavity between the two circulation ports of the second circulation channel (102).

5. The valve core structure according to claim 4, characterized in that: The valve core structure also includes a top plate (15) and a bottom plate (16); the top plate (15) is arranged at the top openings of the outer cavity and the inner cavity; the bottom plate (16) is arranged at the bottom opening of the outer cavity; the radial partition plate (14) is respectively connected to the top plate (15) and the bottom plate (16) at both ends along the axial direction of the valve core structure; a plurality of flow ports are arranged on the bottom plate (16); the top plate (15) forms the bottom wall of the flow cavity of the first flow channel (101); and the bottom plate (16) is used to form the bottom wall of the flow cavity of the second flow channel (102).

6. The valve core structure according to claim 3, characterized in that: The first circulation channel (101) and the second circulation channel (102) are located at the same height of the valve core structure.

7. The valve core structure according to claim 3, characterized in that: The valve core structure also has a plurality of weight-reducing chambers (103) with top openings, and the weight-reducing chambers (103) are arranged to avoid the flow chamber of the first flow channel (101) and the flow chamber of the second flow channel (102).

8. A multi-way valve, characterized in that: The multi-way valve comprises a valve body (20), a valve core sealing gasket (30), an actuator drive assembly (40) and a valve core structure according to any one of claims 1 to 7, the bottom of the valve body (20) having a plurality of flow holes (201) distributed along the circumferential direction, the valve core structure being arranged at the bottom of the cavity of the valve body (20), any one of the flow ports corresponding to one of the flow holes (201), the valve core sealing gasket (30) being arranged between the valve body (20) and the valve core structure, the actuator drive assembly (40) being arranged on the valve body (20) and being drivenly connected to the valve core structure to drive the valve core structure to rotate and adjust the flow condition of the multi-way valve.

9. The multi-way valve according to claim 8, characterized in that: At least one of the flow chambers with an opening at the top is communicated with the cavity of the valve body (20).

10. The multi-way valve according to claim 8, characterized in that: The valve core structure is the valve core structure according to claim 4, and the inner cylinder (11) of the valve core structure has a guide limit groove (111) opening upward, and the driving shaft (41) of the execution drive assembly (40) is inserted into the guide limit groove (111) and is clamped with the inner cylinder (11).

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