Stop structure and multi-way valve with same

Abstract

The utility model provides a backstop structure and a multi-way valve with the same, the backstop structure is arranged between a valve core and a valve body of the multi-way valve, the backstop structure comprises a limiting column, when the valve core rotates, the limiting column can abut against the side wall of the valve core so as to limit the rotation range of the valve core, the limiting column is provided with a buffering part, and the buffering part is arranged on the limiting column. The buffering part is used for buffering the valve element contact limiting column. By means of the technical scheme, the problem that in the prior art, noise is likely to be generated in the switching process of a multi-way valve can be solved.

Description

Technical Field

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

[0002] At present, a multi-way valve is usually set in the air-conditioning system to realize the switching of the refrigerant channel. The multi-way valve usually includes a valve body and a valve core. The valve body is provided with multiple communication ports. The valve core is rotatably arranged in the valve body. The valve core has a circulation channel. By rotating the valve core, the circulation channel is connected with the multiple communication ports, thereby realizing the switching of the cooling and heating modes of the multi-way valve. In the prior art, in order to prevent the valve core from rotating excessively, a limit structure is usually set between the valve core and the valve body to limit the rotation range of the valve core. However, the rotation speed of the valve core is relatively fast. When the valve core cooperates with the limit structure, it is easy to generate noise, which reduces the user experience. Utility Model Content

[0003] The utility model provides a stopper structure and a multi-way valve with the same, so as to solve the problem that the multi-way valve in the prior art easily generates noise during the switching process.

[0004] One aspect of the utility model provides a stop structure, which is arranged between the valve core and the valve body of a multi-way valve. The stop structure includes: a limit column, when the valve core rotates, the limit column can abut against the side wall of the valve core to limit the rotation range of the valve core, and the limit column is provided with a buffer part, which is used to buffer the contact of the valve core with the limit column.

[0005] By applying the technical solution of the present invention, during the rotation of the valve core, the limit post can limit the rotation range of the valve core to prevent the valve core from excessive rotation. During the rotation, the side wall of the valve core will first contact the buffer part for buffering, and then contact the limit post to stop rotation. In this way, the impact on the valve core when it contacts the limit post during rotation can be reduced. Compared with the hard contact between the valve core and the limit structure in the traditional technical solution, the technical solution provided by the present application can reduce the mechanical noise generated by the collision between the limit post and the valve core, thereby improving the user experience.

[0006] Furthermore, the buffering part includes an elastic ring, and at least a part of the elastic ring protrudes from the outer side wall of the limiting column. Through the above arrangement, the elastic ring can buffer the rotation of the valve core to achieve a noise reduction effect.

[0007] Furthermore, a mounting groove is provided in an annular manner on the side wall of the limiting column, and the elastic ring is arranged in the mounting groove. Through the above arrangement, the elastic ring can be limited to prevent the elastic ring from falling off.

[0008] Furthermore, the ratio of the depth of the installation groove to the thickness of the elastic ring in the radial direction is between 0.7 and 0.8. Through the above arrangement, the noise reduction effect of the elastic ring can be ensured while ensuring the valve core to achieve a fast switching function.

[0009] Furthermore, a plurality of elastic rings are provided, and the plurality of elastic rings are arranged at intervals along the axial direction of the limiting column. Through the above arrangement, the plurality of elastic rings can be used to buffer the rotation of the valve core at the same time, so as to improve the buffering effect of the buffer part.

[0010] Furthermore, when the limiting column abuts against the valve core, the length of the portion of the limiting column in contact with the valve core in the axial direction is L, 1.5mm≤L≤4mm. Through the above arrangement, the stable rotation of the valve core can be ensured, and the stability of the installation of the limiting column can be ensured.

[0011] According to another aspect of the utility model, a multi-way valve is provided, the multi-way valve comprising: a valve body, having a connecting cavity, an inlet and an outlet, and a connecting port, the connecting port having a plurality of connecting ports, the plurality of connecting ports being arranged in annular intervals on the valve body, and the plurality of connecting ports being connected to the connecting cavity, the inlet and the outlet being connected to the connecting cavity; a valve core being rotatably arranged in the connecting cavity, the center of the plurality of connecting ports being arranged in annular manner being on the rotation axis of the valve core, the valve core having a circulation channel, the first end of the circulation channel being located on the rotation axis of the valve core and connected to the inlet and the outlet, the second end of the circulation channel being selectively connected to the connecting port; a stop structure being arranged on the valve body to limit the rotation of the valve core, the stop structure being the above-mentioned stop structure. Through the above-mentioned arrangement, the limit column can limit the rotation range of the valve core, prevent the valve core from rotating excessively, causing the second end of the circulation channel to be unable to face the connecting port and causing refrigerant leakage, and by arranging a buffer portion on the limit column, the impact of the valve core when it contacts the limit column during rotation can be reduced, and the mechanical noise generated by the collision between the limit column and the valve core can be reduced.

[0012] Furthermore, the valve body includes a valve seat and an end cover, the end cover and the valve seat form a connecting cavity, the valve seat is provided with a connecting port on one side facing the end cover, the valve seat is provided with a plug-in slot on one side with the connecting port, the limiting column of the stop structure is inserted in the plug-in slot, and the limiting column and the plug-in slot are interference fit. Through the above arrangement, the stability of the installation of the limiting column can be ensured, and the valve core is prevented from rotating too fast to impact the limiting column and cause the limiting column to fall off.

[0013] Furthermore, the limiting column has a body section and a plug-in section connected to each other, the plug-in section is inserted in the plug-in slot, the diameter of the body section is larger than the diameter of the plug-in section, and there is a stepped surface between the plug-in section and the body section. When the limiting column is inserted in the plug-in slot, the stepped surface abuts against the surface of the valve seat having the connecting opening. Through the above arrangement, the limiting column can be prevented from shaking under the impact of the valve core, ensuring the stability of the limiting column fixed on the valve seat.

[0014] Furthermore, the limiting column has a balancing hole which is arranged through the limiting column. Through the above arrangement, the pressure between the limiting column and the valve body can be balanced, and the stability of the installation of the limiting column can be improved.

[0015] Furthermore, at least two limit posts are provided in the stop structure, and the two limit posts respectively limit the forward and reverse rotation of the valve core. Through the above arrangement, the limit post can stop the valve core, prevent the valve core from excessively rotating when switching between the first connecting port and the second connecting port, ensure that the valve core can be switched into place, reduce the noise of the valve core after switching into place, and improve the user experience. 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 structural cross-sectional view of a multi-way valve provided by the utility model is shown;

[0018] Figure 2 The installation diagram of the limit column provided by the utility model is shown;

[0019] Figure 3 The schematic diagram of the structure of the limit column provided by the utility model is shown;

[0020] Figure 4 A cross-sectional view of a limiting column provided by the utility model is shown;

[0021] Figure 5 A schematic diagram showing the structure of the multi-way valve provided by the utility model in which the flow channel is connected to the first communication port;

[0022] Figure 6 A structural schematic diagram showing another perspective of the multi-way valve provided by the utility model being connected to the flow channel and the first communication port;

[0023] Figure 7 A schematic diagram showing the structure of the multi-way valve provided by the utility model, in which the flow channel switches between the first communication port and the second communication port;

[0024] Figure 8 A schematic diagram showing the structure in which the flow channel of the multi-way valve provided by the utility model is connected to the second communication port;

[0025] Fig. 9 A structural schematic diagram showing another perspective of the communication between the flow channel of the multi-way valve provided by the utility model and the second communication port.

[0026] The above drawings include the following reference numerals:

[0027] 10. Valve body; 101. Valve seat; 102. End cover;

[0028] 11. Communication cavity; 12. Entrance and exit;

[0029] 13, communication port; 131, first communication port; 132, second communication port; 133, third communication port;

[0030] 20, valve core; 201, protruding portion; 202, rotating portion; 21, circulation channel;

[0031] 30. Limiting column; 31. Elastic ring; 32. Mounting groove; 33. Balancing hole; 34. Main body section; 35. Plug-in section. DETAILED DESCRIPTION

[0032] 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.

[0033] like Figures 1 to 4 As shown, an embodiment of the utility model provides a stop structure, which is arranged between the valve core 20 and the valve body 10 of the multi-way valve. The stop structure includes: a limit column 30. When the valve core 20 rotates, the limit column 30 can abut against the side wall of the valve core 20 to limit the rotation range of the valve core 20. The limit column 30 is provided with a buffer portion, and the buffer portion is used to buffer the contact of the valve core 20 with the limit column 30.

[0034] By applying the technical solution of the present invention, during the rotation of the valve core 20, the limit column 30 can limit the rotation range of the valve core 20 to prevent the valve core 20 from excessive rotation. During the rotation, the side wall of the valve core 20 will first contact the buffer part for buffering, and then contact the limit column 30 to stop rotation. In this way, the impact on the valve core 20 when it contacts the limit column 30 during rotation can be reduced. Compared with the hard contact between the valve core 20 and the limit structure in the traditional technical solution, the technical solution provided by the present application can reduce the mechanical noise generated by the collision between the limit column 30 and the valve core 20, thereby improving the user experience.

[0035] In a specific embodiment of the present application, the buffer portion includes an elastic ring 31, and at least a portion of the elastic ring 31 is arranged to protrude from the outer wall of the limiting column 30. Through the above arrangement, when the valve core 20 is in the process of rotating and is about to contact the limiting column 30, the side wall of the valve core 20 will first contact the elastic ring 31 protruding from the outer wall of the limiting column 30, and then contact the limiting column 30. The force of the rotation of the valve core 20 will compress the elastic ring 31, causing the elastic ring 31 to deform, so that the elastic ring 31 can buffer the rotation of the valve core 20 to achieve the effect of noise reduction.

[0036] Reference Figure 3 and Figure 4 As shown, a mounting groove 32 is provided in an annular manner on the side wall of the limiting column 30, and the elastic ring 31 is provided in the mounting groove 32. By providing the elastic ring 31 in the mounting groove 32, the displacement of the elastic ring 31 can be limited in the axial direction, so that the elastic ring 31 can be stably fixed on the limiting column 30, and the elastic ring 31 is prevented from being displaced or even falling off when impacted.

[0037] In the present application, the ratio of the depth of the mounting groove 32 to the thickness of the elastic ring 31 along the radial direction is between 0.7 and 0.8. When the ratio of the depth of the mounting groove 32 to the thickness of the elastic ring 31 along the radial direction is less than 0.7, the ratio of the depth of the mounting groove 32 to the thickness of the elastic ring 31 along the radial direction is too small, that is, the compressibility of the elastic ring 31 is too small. When the valve core 20 contacts the elastic ring 31, the deformation amount that the elastic ring 31 can produce to buffer the valve core 20 is too small, and the kinetic energy of the valve core 20 cannot be well absorbed. The valve core 20 may still hit the limit column 30 at a higher speed, generating a large noise; when the ratio of the depth of the mounting groove 32 to the thickness of the elastic ring 31 along the radial direction is greater than 0.8, the depth of the mounting groove 32 is too small. The ratio of the depth of the mounting groove 32 to the thickness of the elastic ring 31 in the radial direction is too large, that is, the compressible amount of the elastic ring 31 is too large, and the time from the valve core 20 starting to contact the elastic ring 31 to the side wall of the limit column 30 during the rotation process is relatively long, which is not conducive to the rapid rotation of the valve core 20, that is, it is not conducive to the rapid switching of the cooling and heating modes of the multi-way valve, and affects the use effect of the multi-way valve. In this application, by setting the ratio of the depth of the mounting groove 32 to the thickness of the elastic ring 31 in the radial direction to between 0.7 and 0.8, the noise reduction effect of the elastic ring 31 can be ensured while ensuring that the valve core 20 can achieve rapid switching. Specifically, the ratio of the depth of the mounting groove 32 to the thickness of the elastic ring 31 in the radial direction can be set to 0.7, 0.75 or 0.8.

[0038] Furthermore, a plurality of elastic rings 31 are provided, and the plurality of elastic rings 31 are arranged at intervals along the axial direction of the limiting column 30. Through the above arrangement, the plurality of elastic rings 31 can be used to buffer the rotation of the valve core 20 at the same time, so as to improve the buffering effect of the buffer part, reduce the mechanical noise generated by the multi-way valve when switching between the cooling and heating modes, and improve the use effect of the user.

[0039] In another specific embodiment of the present application, the buffer portion includes an elastic sleeve, which is arranged on the limit column 30 and covers the side wall of the limit column 30 that can contact the valve core 20. By setting the elastic sleeve, the buffer area of ​​the buffer portion can be further increased, and the buffering effect can be improved. In addition, the elastic sleeve can produce flexible contact with the side wall of the valve core 20, further reducing the noise of the valve core 20 when it impacts the limit column 30.

[0040] In another specific embodiment of the present application, the limiting column 30 is made of elastic material to provide a buffering effect on the valve core 20 as much as possible.

[0041] Specifically, when the limiting post 30 is in contact with the valve core 20, the length of the portion of the limiting post 30 in contact with the valve core 20 in the axial direction is L, 1.5mm≤L≤4mm. When L<1.5mm, the length of the portion of the limiting post 30 in contact with the valve core 20 in the axial direction is too small, and the limiting post 30 is easy to generate a deflection force on the rotation of the valve core 20, affecting the rotation of the valve core 20 or even causing damage to the valve core 20; when L>4mm, the length of the portion of the limiting post 30 in contact with the valve core 20 in the axial direction is too large, and the force arm of the valve core 20 in contact with the limiting post 30 is too long, and the limiting post is easy to break or even fall off, affecting the performance of the limiting post 30. In this application, by setting the length of the portion of the limiting post 30 in contact with the valve core 20 in the axial direction to be between 1.5mm and 4mm, the stable rotation of the valve core 20 can be ensured, and the stability of the installation of the limiting post 30 can be ensured. Specifically, L can be set to 1.5 mm, 2 mm, 3 mm or 4 mm.

[0042] According to another embodiment of the utility model, a multi-way valve is provided, which includes a valve body 10, a valve core 20 and a stopper structure. The valve body 10 has a connecting cavity 11, an inlet and outlet 12 and a connecting port 13. There are multiple connecting ports 13, which are arranged on the valve body 10 in annular intervals, and the multiple connecting ports 13 are all connected to the connecting cavity 11, and the inlet and outlet 12 are connected to the connecting cavity 11. The valve core 20 is rotatably arranged in the connecting cavity 11, and the center of the circle of the multiple connecting ports 13 arranged in annular manner is on the rotation axis of the valve core 20. The valve core 20 has a circulation channel 21, and the first end of the circulation channel 21 is located on the rotation axis of the valve core 20 and is connected to the inlet and outlet 12, and the second end of the circulation channel 21 can be selectively connected to the connecting port 13. The stopper structure is arranged on the valve body 10 to limit the rotation of the valve core 20, and the stopper structure is the above-mentioned stopper structure.

[0043] Through the above arrangement, the valve core 20 can rotate in the connecting cavity 11, so that the second end of the circulation channel 21 can be selectively connected to the connecting port 13, thereby realizing the reversal of the multi-way valve. During the rotation of the valve core 20, the limit column 30 can limit the rotation range of the valve core 20 to prevent the valve core 20 from rotating excessively, causing the second end of the circulation channel 21 to be unable to face the connecting port 13 and causing refrigerant leakage. By setting a buffer portion on the limit column 30, the side wall of the valve core 20 will first contact the buffer portion for buffering during the rotation process, and then contact the limit column 30 and stop rotating. In this way, the impact on the valve core 20 when it contacts the limit column 30 during the rotation process can be reduced, and the mechanical noise generated by the collision between the limit column 30 and the valve core 20 can be reduced, thereby improving the user experience.

[0044] Specifically, the side of the valve core 20 communicating with the inlet and outlet 12 has a rotating portion 202, and the side of the valve core 20 cooperating with the circulation channel has a protruding portion 201. Because the center of the circular arrangement of the plurality of communication ports 13 is on the rotation axis of the valve core 20, the axis of the second end of the circulation channel 21 does not coincide with the rotation axis of the valve core 20. The protruding portion 201 of the valve core 20 has a partial circulation channel 21 inside, and the rotation radius of the protruding portion 201 is greater than the rotation radius of the rotating portion 202. The limiting column 30 can be used to adjust the protruding portion 201. 01 plays a stop role; when the side wall of the valve core 20 abuts against the limit column 30, due to the fast rotation speed of the valve core 20, the limit column 30 will have a greater impact with the valve core 20 and generate noise. The valve core 20 has a flow channel 21 inside, and the cavity structure will also increase the noise when the valve core 20 is impacted. The buffering effect of the buffer part on the valve core 20 can also reduce the impact of the valve core 20 on the flow channel 21, reduce the disturbance of the refrigerant in the flow channel 21, and further reduce the noise caused by the disturbance of the refrigerant.

[0045] In a specific embodiment of the present application, the limiting column 30 of the stop structure is arranged on the surface of the valve seat 101 having the communication port 13, and is an integrally formed structure with the valve seat 101. Through the above arrangement, the stability of the limiting column 30 can be ensured, and the valve core 20 is prevented from rotating too fast to impact the limiting column 30 and cause the limiting column 30 to fall off, affecting the fixation of the limiting column 30, and improving the stability of the installation of the limiting column 30.

[0046] In a specific embodiment of the present application, the valve body 10 includes a valve seat 101 and an end cover 102, the end cover 102 and the valve seat 101 form a connecting cavity 11, the valve seat 101 is provided with a connecting port 13 on one side facing the end cover 102, the valve seat 101 is provided with a plug-in slot on one side having the connecting port 13, the limiting column 30 is inserted in the plug-in slot, and the limiting column 30 and the plug-in slot are interference fit. By setting the fixing mode of the limiting column 30 to a plug-in mode, the installation and removal of the limiting column 30 can be facilitated, and by setting the limiting column 30 to have an interference fit with the plug-in slot, the stability of the connection between the limiting column 30 and the valve seat 101 can also be improved.

[0047] Furthermore, after the limiting column 30 is inserted into the insertion groove, the limiting column 30 and the valve seat 101 may be welded together by welding to further improve the connection strength between the limiting column 30 and the valve seat 101 .

[0048] In the present application, the limit post 30 has a balancing hole 33 that is set through. During the use of the multi-way valve, high-pressure refrigerant or low-pressure refrigerant will be introduced into the communication chamber 11. When the high-pressure refrigerant is introduced into the communication chamber 11, the high-pressure refrigerant is easy to enter the fitting between the limit post 30 and the valve body 10, causing the limit post 30 to axially shift, or even causing the limit post 30 to fall off. By setting the balancing hole 33, the pressure between the limit post 30 and the valve body 10 can be balanced, and the stability of the installation of the limit post 30 can be improved.

[0049] Specifically in the present application, the limiting column 30 has a body section 34 and a plug section 35 connected to each other, the plug section 35 is inserted in the plug slot, the diameter of the body section 34 is larger than the diameter of the plug section 35, and there is a stepped surface between the plug section 35 and the body section 34. When the limiting column 30 is inserted in the plug slot, the stepped surface abuts against the surface of the valve seat 101 having the connecting port 13. Through the above arrangement, the limiting column 30 can be prevented from shaking under the impact of the valve core 20, causing the connection between the limiting column 30 and the valve seat 101 to fail, and further ensure the stability of the limiting column 30 fixed on the valve seat 101.

[0050] Specifically, in the present application, at least two limit posts 30 of the stop structure are provided, and the two limit posts 30 respectively limit the forward and reverse rotation of the valve core 20. Through the above arrangement, the limit posts 30 can limit the movement of the valve core 20 during the switching process of the multi-way valve cooling and heating modes, so as to reduce the mechanical noise of the multi-way valve during the switching process.

[0051] Specifically in the present application, the communication port 13 includes a first communication port 131, a second communication port 132 and a third communication port 133 which are arranged in sequence, and the limiting posts 30 are arranged on both sides of the third communication port 133. The limiting posts 30 cooperate with the valve core 20 to enable the valve core 20 to rotate between the first communication port 131 and the second communication port 132. The first section of the circulation channel 21 is connected to one of the first communication port 131 and the second communication port 132, and the third communication port 133 is connected to the other of the first communication port 131 and the second communication port 132 through the communication cavity 11, and the limiting posts 30 are arranged on both sides of the third communication port 133. The specific process of the multi-way valve when switching is as follows: Figure 5 and Figure 6 As shown, at this time, the second end of the circulation channel 21 is connected to the first communication port 131, the first communication port 131 is connected to the inlet and outlet 12 through the circulation channel 21, and the second communication port 132 is connected to the third communication port 133 through the communication cavity 11. When the valve core 20 rotates counterclockwise, as shown in FIG. Figure 7 As shown, the second end of the circulation channel 21 begins to pass through the first communication port 131 and the second communication port 132, and the valve core 20 continues to rotate, and the second end of the circulation channel 21 is connected to the second communication port 132. Figure 8 and Fig. 9 As shown, at this time, the second communication port 132 is connected to the inlet and outlet 12 through the circulation channel 21, and the first communication port 131 is connected to the third communication port 133 through the communication cavity 11, so that the valve body is switched. By arranging the limit posts 30 on both sides of the third communication port 133, the valve core 20 can be stopped to prevent the valve core 20 from excessively rotating when switching between the first communication port 131 and the second communication port 132, so as to ensure that the valve core 20 can be switched into place. At the same time, by arranging the buffer part on the limit posts 30, the impact on the valve core 20 during the rotation process can be reduced, the noise of the multi-way valve during the switching process can be reduced, and the user's experience can be guaranteed.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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 stop structure, It is characterized in that The stop structure is arranged between a valve core (20) and a valve body (10) of a multi-way valve, and the stop structure comprises: A limit column (30), when the valve core (20) rotates, the limit column (30) can abut against the side wall of the valve core (20) to limit the rotation range of the valve core (20), and the limit column (30) has a buffer portion, which is used to buffer the contact of the valve core (20) with the limit column (30).

2. The stop structure according to claim 1, It is characterized in that The buffer portion comprises an elastic ring (31), and at least a portion of the elastic ring (31) is arranged to protrude from the outer side wall of the limiting column (30).

3. The stop structure according to claim 2, It is characterized in that A mounting groove (32) is provided in an annular shape on the side wall of the limiting column (30), and the elastic ring (31) is arranged in the mounting groove (32).

4. The stop structure according to claim 3, It is characterized in that The ratio of the depth of the installation groove (32) to the thickness of the elastic ring (31) along the radial direction is between 0.7 and 0.

8.

5. The stop structure according to claim 2, It is characterized in that A plurality of the elastic rings (31) are provided, and the plurality of the elastic rings (31) are arranged at intervals along the axial direction of the limiting column (30).

6. The stop structure according to claim 1, It is characterized in that When the limiting column (30) is in contact with the valve core (20), the length of the portion of the limiting column (30) in contact with the valve core (20) in the axial direction is L, and 1.5 mm ≤ L ≤ 4 mm.

7. A multi-way valve, It is characterized in that The multi-way valve comprises: A valve body (10) having a communication cavity (11), an inlet and outlet (12) and a communication port (13), wherein the communication port (13) is provided in plurality, the plurality of communication ports (13) are arranged in annular intervals on the valve body (10), and the plurality of communication ports (13) are all in communication with the communication cavity (11), and the inlet and outlet (12) is in communication with the communication cavity (11); A valve core (20) is rotatably arranged in the communication cavity (11); the center of the plurality of communication ports (13) arranged in an annular manner is on the rotation axis of the valve core (20); the valve core (20) has a circulation channel (21); a first end of the circulation channel (21) is located on the rotation axis of the valve core (20) and is in communication with the inlet and outlet (12); and a second end of the circulation channel (21) can be selectively in communication with the communication port (13); A stop structure is provided on the valve body (10) to limit the rotation of the valve core (20), and the stop structure is the stop structure according to any one of claims 1 to 6.

8. The multi-way valve according to claim 7, It is characterized in that The valve body (10) comprises a valve seat (101) and an end cover (102), wherein the end cover (102) and the valve seat (101) form the connecting cavity (11), the valve seat (101) is provided with the connecting port (13) on one side facing the end cover (102), the valve seat (101) is provided with a plug-in groove on one side having the connecting port (13), the limiting column (30) of the stop structure is inserted into the plug-in groove, and the limiting column (30) is interference fit with the plug-in groove.

9. The multi-way valve according to claim 8, It is characterized in that The limiting column (30) has a balancing hole (33) extending therethrough.

10. The multi-way valve according to claim 8, It is characterized in that The limiting column (30) comprises a main body section (34) and an inserting section (35) which are connected to each other. The inserting section (35) is inserted in the inserting groove. The diameter of the main body section (34) is larger than the diameter of the inserting section (35). A stepped surface is provided between the inserting section (35) and the main body section (34). When the limiting column (30) is inserted in the inserting groove, the stepped surface abuts against a surface of the valve seat (101) having the connecting port (13).

11. The multi-way valve according to claim 7, It is characterized in that At least two limiting columns (30) of the stop structure are provided, and the two limiting columns (30) respectively limit the forward and reverse rotation of the valve core (20).

Images