Multi-way valve

Abstract

The utility model provides a multi-way valve, which comprises a driving device, a control device and a control device, the driving device is provided with a driving assembly and a speed reduction assembly, the driving assembly is in driving connection with the speed reduction assembly, and the speed reduction assembly is provided with a speed reduction output part; the valve body assembly is provided with a mounting cavity and a communicating cavity, and the speed reduction output part is rotatably arranged in the mounting cavity; the valve element assembly is rotatably arranged in the communicating cavity, the valve element assembly is in driving connection with the speed reduction output part, and the valve element assembly can be driven by the driving device to achieve runner switching of the multi-way valve; and a limiting structure is arranged between the speed reduction output part and the mounting cavity so as to limit the rotation range of the speed reduction output part in the mounting cavity. According to the technical scheme, the problem that a valve element of a multi-way valve in the prior art is prone to excessive rotation can be solved.

Description

Technical Field

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

[0002] At present, multi-way valves are often used in air-conditioning systems to control the switching of cooling and heating modes of air-conditioning systems. Existing multi-way valves usually include a driving device, a valve body and a valve core. The driving device drives the valve core to rotate in the valve body so that the valve core is connected to different system pipelines to achieve the switching of the flow channel. However, in the existing technical solutions, when the driving device drives the valve core to rotate, the valve core is prone to excessive rotation, resulting in a deviation in the matching between the valve core and the flow channel, reducing the matching area between the valve core and the flow channel, and even causing refrigerant leakage, which seriously affects the use of the multi-way valve. Utility Model Content

[0003] The utility model provides a multi-way valve to solve the problem that the valve core of the multi-way valve in the prior art is prone to excessive rotation.

[0004] The utility model provides a multi-way valve, which comprises: a driving device, having a driving component and a reduction component, the driving component is drivingly connected to the reduction component, and the reduction component has a reduction output part; a valve body component, having an installation cavity and a connecting cavity, and the reduction output part is rotatably arranged in the installation cavity; a valve core component, which is rotatably arranged in the connecting cavity, the valve core component is drivingly connected to the reduction output part, and the valve core component can realize flow channel switching of the multi-way valve under the drive of the driving device; wherein a limiting structure is arranged between the reduction output part and the installation cavity to limit the rotation range of the reduction output part in the installation cavity.

[0005] By applying the technical solution of the utility model, the multi-way valve includes a driving device, a valve body assembly and a valve core assembly. The reduction assembly of the driving device can amplify the torque of the driving assembly, so that the valve core assembly can overcome the friction torque and load torque during rotation, thereby improving the driving effect of the driving device, realizing rapid rotation of the valve core assembly, and further realizing rapid switching of the cooling and heating modes of the multi-way valve; at the same time, by providing a limiting structure between the reduction output part driven and connected to the valve core assembly and the mounting cavity, the rotation range of the reduction output part in the mounting cavity can be limited, thereby limiting the rotation range of the valve core assembly in the connecting cavity, preventing the valve core assembly from rotating excessively, and ensuring that the valve core assembly can be correctly and accurately connected to different flow channels, so as to prevent the valve core assembly from being unable to align when cooperating with different flow channels, ensuring the sealing performance of the valve core assembly and the valve body assembly, and improving the circulation effect of the refrigerant fluid in the multi-way valve.

[0006] Furthermore, the limiting structure includes: a limiting column, which is arranged on one side of the speed reduction output part close to the installation cavity; a limiting groove, which is arranged at the bottom of the installation cavity, and the limiting column is movably arranged in the limiting groove, and the extension direction of the limiting groove is adapted to the movement path of the limiting column. Through the above arrangement, the two ends of the limiting groove can limit the movement of the limiting column, thereby realizing the limitation of the speed reduction output part and preventing the valve core assembly from excessive rotation.

[0007] Furthermore, two limiting posts and two limiting grooves are provided, the limiting posts and the limiting grooves are provided one by one, and the two limiting posts are symmetrically provided along the axis of the deceleration assembly. Through the above arrangement, it is possible to prevent the deceleration assembly from generating a deflection force during the rotation process.

[0008] Furthermore, the reduction assembly includes a reduction wheel group and an output shaft, a plug hole is provided on the side of the reduction wheel group facing the valve core assembly, one end of the output shaft is plugged into the plug hole, the other end of the output shaft is connected to the valve core assembly, and the limit column is provided on the reduction wheel group. Through the above arrangement, the connection and installation of the reduction assembly and the valve core can be facilitated.

[0009] Furthermore, the reduction gear set comprises a sun gear, a planetary gear and an output gear, the sun gear is drivingly connected to the driving assembly, a plurality of planetary gears are provided, the plurality of planetary gears are respectively meshed with the sun gear, the output gear comprises an internal gear structure, the internal gear structure and the output shaft are respectively provided on both sides of the output gear, the internal gear structure is rotatably sleeved on the outer sides of the plurality of planetary gears, the outer teeth of the plurality of planetary gears are meshed with the internal gear structure, the output gear forms a reduction output part, the plug-in hole is provided on the output gear, the reduction output part is drivingly connected to the valve core assembly through the output shaft, and the limit column is provided on the output gear. Through the above-mentioned arrangement, the rotation range of the output gear can be limited by the limit column, thereby preventing the excessive rotation of the reduction output part.

[0010] Furthermore, the limiting column and the output wheel are integrally formed by powder metallurgy or injection molding. Through the above arrangement, the risk of the limiting column falling off after long-term use can be reduced.

[0011] Furthermore, the reduction wheel set has a limiting boss on one side facing the output shaft, and the limiting boss is arranged around the outer periphery of the plug hole, and the reduction wheel set abuts against the bottom of the installation cavity through the limiting boss. Through the above arrangement, the limiting boss can reduce the contact area between the output wheel and the bottom surface of the installation cavity, thereby reducing the friction on the output wheel.

[0012] Furthermore, there is a stop structure between the output shaft and the reduction wheel set, and the stop structure is used to limit the relative rotation of the output shaft to the reduction wheel set. Through the above arrangement, the limit structure can limit the relative rotation of the output shaft and the reduction wheel set, ensuring the accuracy of the response action of the valve core assembly.

[0013] Furthermore, the inner wall of the plug hole has a section, the output shaft has a connecting section, and the inner wall shape of the plug hole is adapted to the outer peripheral shape of the connecting section to form a rotation-stopping structure. Through the above arrangement, the synchronous rotation of the output shaft and the reduction assembly can be ensured, and the stability of the multi-way valve operation can be ensured.

[0014] Furthermore, a plug-in slot is provided on the output shaft, and the valve core assembly has a drive shaft, and the drive shaft and the plug-in slot are matched in the circumferential upper limit to limit the rotation of the drive shaft relative to the output shaft. Through the above arrangement, the synchronous rotation between the valve core assembly and the output shaft can be ensured, and the valve core assembly can be further prevented from excessive rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] 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:

[0016] Figure 1 A cross-sectional view of a multi-way valve provided by the utility model is shown;

[0017] Figure 2 The schematic diagram of the structure of the speed reduction output part provided by the utility model is shown;

[0018] Figure 3 A top view of the valve seat provided by the utility model is shown;

[0019] Figure 4 A cross-sectional view of the valve seat provided by the utility model is shown;

[0020] Figure 5 The front view of the speed reduction output part provided by the utility model is shown;

[0021] Figure 6 A schematic diagram showing the angles through which the valve core assembly provided by the utility model rotates;

[0022] Figure 7 A schematic diagram showing the rotation angle of the limit column valve core assembly provided by the utility model;

[0023] Figure 8 The schematic diagram of the structure of the output wheel provided by the utility model is shown;

[0024] Fig. 9 The schematic diagram of the structure of the output shaft provided by the utility model is shown.

[0025] The above drawings include the following reference numerals:

[0026] 10. Driving device; 11. Driving assembly; 12. Speed ​​reduction assembly;

[0027] 121, reduction wheel set; 1211, sun wheel; 1212, planetary wheel; 1213, output wheel;

[0028] 122, output shaft; 1221, connecting section; 1222, plug-in slot;

[0029] 123, plug-in hole; 124, limiting boss; 125, section;

[0030] 20. Valve body assembly; 201. Valve seat; 202. Valve cover; 21. Installation cavity; 22. Communication cavity; 23. Communication port; 231. First communication port; 232. Second communication port; 233. Third communication port; 24. Inlet and outlet;

[0031] 30. valve core assembly; 31. drive shaft; 32. circulation channel;

[0032] 41. Limiting column; 42. Limiting groove. DETAILED DESCRIPTION

[0033] 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.

[0034] like Figures 1 to 5 As shown, an embodiment of the utility model provides a multi-way valve, which includes a driving device 10, a valve body assembly 20 and a valve core assembly 30. The driving device 10 has a driving assembly 11 and a reduction assembly 12, the driving assembly 11 is drivingly connected to the reduction assembly 12, and the reduction assembly 12 has a reduction output portion. The valve body assembly 20 has an installation cavity 21 and a connecting cavity 22, and the reduction output portion is rotatably arranged in the installation cavity 21. The valve core assembly 30 is rotatably arranged in the connecting cavity 22, and the valve core assembly 30 is drivingly connected to the reduction output portion, and the valve core assembly 30 can realize the flow channel switching of the multi-way valve under the drive of the driving device 10. A limiting structure is arranged between the reduction output portion and the installation cavity 21 to limit the rotation range of the reduction output portion in the installation cavity 21.

[0035] By applying the technical solution of the utility model, the multi-way valve includes a drive device 10, a valve body assembly 20 and a valve core assembly 30. The reduction assembly 12 of the drive device 10 can amplify the torque of the drive assembly 11, so that the valve core assembly 30 can overcome the friction torque and load torque during the rotation process, thereby improving the driving effect of the drive device 10, realizing the rapid rotation of the valve core assembly 30, and then realizing the rapid switching of the cooling and heating modes of the multi-way valve; at the same time, by providing a limiting structure between the reduction output part driven and connected to the valve core assembly 30 and the mounting cavity 21, the rotation range of the reduction output part in the mounting cavity 21 can be limited, thereby limiting the rotation range of the valve core assembly 30 in the connecting cavity 22, preventing the valve core assembly 30 from rotating excessively, ensuring that the valve core assembly 30 can be correctly and accurately connected with different flow channels, so as to prevent the valve core assembly 30 from being unable to align when cooperating with different flow channels, ensuring the sealing performance of the valve core assembly 30 and the valve body assembly 20, and improving the circulation effect of the refrigerant fluid in the multi-way valve.

[0036] Specifically in the present application, the valve body assembly 20 includes a valve seat 201 and a valve cover 202 . The valve seat 201 has an installation cavity 21 . The valve seat 201 and the valve cover 202 together form a connecting cavity 22 to facilitate the installation of the valve core assembly 30 .

[0037] Specifically in the present application, the valve body assembly 20 also has a connecting port 23 and an inlet and outlet 24. There are multiple connecting ports 23, and the multiple connecting ports 23 are arranged on the valve body assembly 20 at annular intervals. The multiple connecting ports 23 are all connected to the connecting cavity 22, and the inlet and outlet 24 are also connected to the connecting cavity 22. The valve core assembly 30 has a circulation channel 32, one end of the circulation channel 32 is located on the rotation axis of the valve core assembly 30 and is connected to the inlet and outlet 24, and the other end of the circulation channel 32 can be selectively connected to the connecting port 23. When it is necessary to switch the flow channel, the valve core assembly 30 can be driven by the driving device 10 to rotate between the multiple connecting ports 23, so that the circulation channel 32 is connected to different connecting ports 23, thereby realizing the switching of the heating and cooling modes.

[0038] In a specific embodiment of the present application, the limiting structure includes a limiting column 41 and a limiting groove 42. The limiting column 41 is arranged on a side of the speed reduction output part close to the installation cavity 21, the limiting groove 42 is arranged at the bottom of the installation cavity 21, the limiting column 41 is movably arranged in the limiting groove 42, and the extension direction of the limiting groove 42 is adapted to the moving path of the limiting column 41. Through the above arrangement, when the speed reduction output part drives the valve core assembly 30 to rotate, the limiting column 41 will also rotate with the speed reduction output part and move along the limiting groove 42. The two ends of the limiting groove 42 can stop the movement of the limiting column 41, thereby realizing the limitation of the speed reduction output part, preventing the valve core assembly 30 from excessive rotation, ensuring that the circulation channel 32 can accurately correspond to the connecting port 23, and ensuring the normal circulation of the refrigerant fluid.

[0039] Reference Figure 6 and Figure 7 As shown, the multi-way valve is provided with three communication ports in this embodiment, specifically, the first communication port 231, the second communication port 232 and the third communication port 233. The valve body assembly 20 is provided with a first refrigerant channel, a second refrigerant channel and a third refrigerant channel, one end of the first refrigerant channel is located on the side wall of the valve body assembly 20, and the other end of the first refrigerant channel forms the first communication port 231, one end of the second refrigerant channel and one end of the third refrigerant channel are both provided on the side wall of the valve body assembly 20, the other end of the second refrigerant channel forms the second communication port 232, and the other end of the third refrigerant channel forms the third communication port 233. The third refrigerant channel can be passed through a low-temperature refrigerant or a high-temperature refrigerant. When the high-temperature refrigerant is passed through the third refrigerant channel, the connecting cavity 22 is connected to the third connecting port 233, and the high-temperature refrigerant is also passed through the connecting cavity 22. At this time, the refrigerant passed through the inlet and outlet 24 is the low-temperature refrigerant, and the refrigerant passed through the circulation channel 32 connected to the inlet and outlet 24 is also the low-temperature refrigerant. When the circulation channel 32 is connected to the first connecting port 231, the low-temperature refrigerant flows out from the first connecting port 231, and the high-temperature refrigerant flows out from the second connecting port 232. In this way, the connection of the refrigerant flow channels can be achieved; when the driving device 10 drives the valve core assembly 30 to rotate, so that the circulation channel 32 is connected to the second connecting port 232, the refrigerant passed through the second refrigerant flow channel is the low-temperature refrigerant, and the high-temperature refrigerant will enter the first refrigerant flow channel through the first connecting port 231, and the flow channel switching can be completed. Specifically, Figure 6 As shown, α is the angle of rotation of the valve core assembly 30 during the rotation process, as shown in FIG. Figure 7 As shown, β is the angle at which the limiting column 41 rotates along with the speed reduction output portion, and α and β are matched to prevent the valve core assembly 30 from excessively rotating, thereby ensuring the limiting effect of the limiting groove 42 .

[0040] In a specific embodiment of the present application, two limiting posts 41 and two limiting grooves 42 are provided, and the limiting posts 41 and the limiting grooves 42 are provided one by one, and the two limiting posts 41 are symmetrically provided along the axis of the reduction assembly 12. Through the above arrangement, the two limiting posts 41 can balance the rotational torque of the reduction assembly 12, prevent the reduction assembly 12 from generating a deflection force during the rotation process, ensure the stable rotation of the reduction assembly 12, reduce the wear of the reduction assembly 12 during the rotation process, and increase the service life of the reduction assembly 12.

[0041] Reference Figure 8 and Fig. 9As shown, in a specific embodiment of the present application, the reduction assembly 12 includes a reduction wheel group 121 and an output shaft 122. The reduction wheel group 121 is provided with a plug hole 123 on the side facing the valve core assembly 30. One end of the output shaft 122 is plugged into the plug hole 123, and the other end of the output shaft 122 is drivingly connected to the valve core assembly 30. The limit column 41 is provided on the reduction wheel group 121. Such a configuration can facilitate the connection and installation of the reduction assembly 12 and the valve core assembly 30.

[0042] Specifically, the reduction wheel group 121 has a sun gear 1211, a planetary gear 1212 and an output wheel 1213. The sun gear 1211 is drivingly connected to the driving assembly 11. A plurality of planetary gears 1212 are provided, and the plurality of planetary gears 1212 are respectively meshed with the sun gear 1211. The output wheel 1213 has an internal gear structure. The internal gear structure and the output shaft 122 are respectively arranged on both sides of the output wheel 1213. The internal gear structure is rotatably sleeved on the outer sides of the plurality of planetary gears 1212. The outer teeth of the plurality of planetary gears 1212 are meshed with the internal gear structure. The output wheel 1213 forms a reduction output part. The plug-in hole 123 is arranged on the output wheel 1213. The reduction output part is drivingly connected to the valve core assembly 30 through the output shaft 122. The limiting column 41 is arranged on the output wheel 1213. Through the above-mentioned arrangement, the sun gear 1211 can transmit the torque of the drive component 11 to the output wheel 1213 through multiple planetary gears 1212, thereby increasing the driving torque of the drive component 11 and realizing rapid switching of the valve core component 30, thereby realizing rapid switching of the cooling and heating modes of the multi-way valve. By setting a limit column 41 on the output wheel 1213, the rotation range of the output wheel 1213 can be limited by the limit column 41, thereby preventing excessive rotation of the deceleration output part.

[0043] Specifically in the present application, the limiting column 41 and the output wheel 1213 are integrally formed by powder metallurgy or injection molding. Through the above arrangement, the integrity and structural performance of the output wheel 1213 can be improved, and the risk of the limiting column 41 falling off after long-term use can be reduced.

[0044] Furthermore, the reduction wheel assembly 121 has a limiting boss 124 on one side facing the output shaft 122, and the limiting boss 124 is arranged around the outer periphery of the plug hole 123, and the reduction wheel assembly 121 abuts against the bottom of the installation cavity 21 through the limiting boss 124. Through the above arrangement, when the reduction assembly 12 is installed in the installation cavity 21, the limiting boss 124 can reduce the contact area between the output wheel 1213 and the bottom surface of the installation cavity 21, reduce the friction of the output wheel 1213, and increase the service life of the output wheel 1213.

[0045] In another embodiment of the present application, a stop structure is provided between the output shaft 122 and the reduction wheel assembly 121, and the stop structure is used to limit the rotation of the output shaft 122 relative to the reduction wheel assembly 121. Through the above arrangement, the limit structure can limit the relative rotation of the output shaft 122 and the reduction wheel assembly 121, so that the output shaft 122 and the reduction wheel assembly 121 can ensure synchronous rotation, thereby limiting the rotation range of the valve core assembly 30 connected to the reduction assembly 12, and ensuring the accuracy of the response action of the valve core assembly 30.

[0046] Specifically, the inner wall of the plug hole 123 has a cut surface 125, and the output shaft 122 has a connecting section 1221. The inner wall shape of the plug hole 123 is adapted to the outer peripheral shape of the connecting section 1221 to form a rotation-stopping structure. Through the above arrangement, the cut surface 125 cooperates with the connecting section 1221 to ensure the synchronous rotation of the output shaft 122 and the reduction assembly 12, ensure the stability of the multi-way valve operation, and improve the response speed of the multi-way valve when switching between cooling and heating modes.

[0047] Furthermore, the output shaft 122 is provided with a plug-in groove 1222, and the valve core assembly 30 has a drive shaft 31, and the drive shaft 31 cooperates with the plug-in groove 1222 in the circumferential upper limit to limit the rotation of the drive shaft 31 relative to the output shaft 122. Through the above arrangement, the synchronous rotation between the valve core assembly 30 and the output shaft 122 can be ensured, the stable connection between the valve core assembly 30 and the reduction assembly 12 can be ensured, the response accuracy of the valve core assembly 30 to the reduction assembly 12 can be improved, and the valve core assembly 30 can be further prevented from excessive rotation, and the matching effect of the valve core assembly 30 and the valve body assembly 20 can be ensured.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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 multi-way valve, characterized in that: The multi-way valve comprises: A driving device (10) comprises a driving component (11) and a reduction component (12), wherein the driving component (11) is drivingly connected to the reduction component (12), and the reduction component (12) comprises a reduction output portion; A valve body assembly (20) having a mounting cavity (21) and a communicating cavity (22), wherein the speed reduction output portion is rotatably disposed in the mounting cavity (21); A valve core assembly (30) is rotatably disposed in the communication chamber (22), the valve core assembly (30) being drivingly connected to the speed reduction output portion, and the valve core assembly (30) can realize flow channel switching of the multi-way valve under the drive of the drive device (10); Wherein, a limiting structure is provided between the deceleration output part and the mounting cavity (21) so as to limit the rotation range of the deceleration output part in the mounting cavity (21).

2. The multi-way valve according to claim 1, characterized in that: The limiting structure comprises: A limiting column (41), the limiting column (41) being arranged on a side of the speed reduction output portion close to the mounting cavity (21); A limiting groove (42), wherein the limiting groove (42) is arranged at the bottom of the installation cavity (21), the limiting column (41) is movably arranged in the limiting groove (42), and the extension direction of the limiting groove (42) is adapted to the moving path of the limiting column (41).

3. The multi-way valve according to claim 2, characterized in that: Two of the limiting columns (41) and the limiting grooves (42) are provided, the limiting columns (41) and the limiting grooves (42) are provided in one-to-one correspondence, and the two limiting columns (41) are symmetrically provided along the axis of the deceleration assembly (12).

4. The multi-way valve according to claim 2, characterized in that: The reduction assembly (12) comprises a reduction wheel group (121) and an output shaft (122); a plug hole (123) is provided on the side of the reduction wheel group (121) facing the valve core assembly (30); one end of the output shaft (122) is plugged into the plug hole (123); the other end of the output shaft (122) is drivingly connected to the valve core assembly (30); and the limit column (41) is provided on the reduction wheel group (121).

5. The multi-way valve according to claim 4, characterized in that: The reduction gear set (121) comprises a sun gear (1211), a planetary gear (1212) and an output gear (1213); the sun gear (1211) is drivingly connected to the drive assembly (11); a plurality of planetary gears (1212) are provided, and the plurality of planetary gears (1212) are respectively meshed with the sun gear (1211); the output gear (1213) comprises an internal gear structure, and the internal gear structure and the output shaft (122) are respectively provided on the output gear (1213). ), the internal gear structure is rotatably mounted on the outer sides of the plurality of planetary gears (1212), the outer teeth of the plurality of planetary gears (1212) are meshed with the internal gear structure, the output wheel (1213) forms the reduction output portion, the plug-in hole (123) is arranged on the output wheel (1213), the reduction output portion is drivingly connected to the valve core assembly (30) through the output shaft (122), and the limit column (41) is arranged on the output wheel (1213).

6. The multi-way valve according to claim 5, characterized in that: The limiting column (41) and the output wheel (1213) are integrally formed by powder metallurgy or injection molding.

7. The multi-way valve according to claim 4, characterized in that: The reduction wheel assembly (121) has a limiting boss (124) on one side facing the output shaft (122), and the limiting boss (124) is arranged around the outer periphery of the plug hole (123). The reduction wheel assembly (121) abuts against the bottom of the installation cavity (21) via the limiting boss (124).

8. The multi-way valve according to claim 4, characterized in that: A rotation-stopping structure is provided between the output shaft (122) and the reduction wheel set (121), and the rotation-stopping structure is used to limit the output shaft (122) from rotating relative to the reduction wheel set (121).

9. The multi-way valve according to claim 8, characterized in that: The inner wall of the plug hole (123) has a cut surface (125), the output shaft (122) has a connecting section (1221), and the shape of the inner wall of the plug hole (123) is matched with the outer peripheral shape of the connecting section (1221) to form the anti-rotation structure.

10. The multi-way valve according to claim 4, characterized in that: The output shaft (122) is provided with a plug-in groove (1222), and the valve core assembly (30) has a drive shaft (31). The drive shaft (31) and the plug-in groove (1222) are matched in a circumferential upper limit position to limit the rotation of the drive shaft (31) relative to the output shaft (122).

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