Multi-way switching valve

Abstract

The application provides a multi-way switching valve, comprising a switching assembly and a driving assembly, the switching assembly comprising a main body structure, a flow guide structure and a valve core structure; the main body structure has a first flow passage inside, and the flow guide structure is arranged in the first flow passage; the valve core structure is rotatably arranged on the main body structure, and the driving assembly is drivingly connected with the valve core structure and used for driving the valve core structure to rotate; wherein the flow guide structure has a stop structure, the stop structure is used for limiting the rotation range of the driving assembly and / or the valve core structure, and the stop structure is made of non-metallic material. By arranging the stop structure made of non-metallic material, the rotation of the valve core structure made of metal material is limited, the collision noise between the valve core structure and the stop structure is effectively reduced, and the overall noise during the working process of the multi-way switching valve is effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and more specifically, to a multi-way switching valve. Background Technology

[0002] Currently, the switching between heating and cooling modes in air conditioning systems is mainly achieved through a four-way valve.

[0003] The four-way valve in the prior art typically includes a valve body with a main flow channel and three branch flow channels. The high-pressure inlet of the main flow channel is connected to the high-pressure outlet of the compressor. The three branch flow channels have a low-pressure outlet, an evaporator outlet, and a condenser outlet, respectively. The condenser outlet is connected to the condenser, the evaporator outlet is connected to the evaporator, and the low-pressure outlet is connected to the low-pressure inlet of the compressor. When the air conditioner needs to switch between cooling and heating modes, the four-way valve can achieve the connection between the main flow channel and a certain branch flow channel by rotating the valve core in the valve body, thereby realizing the reversing operation.

[0004] However, in existing four-way valves, the limiting structure on the valve body used to limit the rotation range of the valve core is usually integrally formed with the valve body. Since the valve body needs to withstand the pressure of the internal high-pressure heat exchange medium, it usually needs to be made of high-strength metal. This causes the metal valve core to collide with the metal limiting structure when rotating and limiting, resulting in a lot of noise during the operation of the four-way valve. Summary of the Invention

[0005] This invention provides a multi-way switching valve to at least solve the problem of excessive noise in the valve core of the existing four-way valve during operation.

[0006] To address the aforementioned problems, this invention provides a multi-way switching valve, comprising: a switching component and a driving component. The switching component includes a main body structure, a flow guiding structure, and a valve core structure. The main body structure has a first flow cavity inside, and the flow guiding structure is disposed within the first flow cavity. The valve core structure is rotatably disposed on the main body structure, and the driving component is drivenly connected to the valve core structure for driving the valve core structure to rotate. The flow guiding structure has a stop structure, which limits the rotation range of the driving component and / or the valve core structure. The stop structure is made of a non-metallic material.

[0007] Furthermore, the main structure has a stop groove, at least a portion of the stop structure is located in the stop groove; a portion of the drive assembly and / or valve core structure extends into the stop groove, and this portion is limited and engaged with the stop structure.

[0008] Furthermore, the main structure includes an upper valve cover and a valve body; the valve body has a first flow cavity and a second flow cavity inside; the first flow cavity is used for the flow of low-pressure heat exchange medium, and the second flow cavity is used for the flow of high-pressure heat exchange medium; the upper valve cover is fixedly installed at one end of the valve body in the axial direction to seal the first flow cavity; the connection end between the drive assembly and the valve core structure is the drive end, the drive end is located at the upper valve cover, and there is a channel between the valve core structure and the upper valve cover that communicates with the interior of the drive end, through which the low-pressure heat exchange medium in the first flow cavity enters the drive assembly.

[0009] Furthermore, the upper valve cover has a stop groove that extends through the upper valve cover along its axial direction; the drive assembly includes an output wheel structure located at the drive end and connected to the valve core structure; wherein a portion of the output wheel structure extends into the stop groove and engages with the stop structure to limit the rotation range of the valve core structure.

[0010] Furthermore, the output wheel structure has a stop boss at the end facing the valve core structure, a portion of which extends into the stop groove; the stop structure includes at least two spaced-apart stop protrusions, with the stop boss located between the two stop protrusions; the two stop protrusions are located in the stop groove and respectively engage with the stop boss to limit the rotation range of the output wheel structure, and the circumferential spacing angle of the two stop protrusions corresponds to the rotation angle range of the output wheel structure.

[0011] Furthermore, a stop protrusion arranged at two intervals constitutes a stop group, and there are at least two stop groups, which are arranged at intervals along the circumference of the flow guide structure; there are at least two stop grooves, which are arranged at intervals along the circumference of the upper valve cover, and at least a portion of the stop grooves corresponds to and engages with at least two stop groups; there are at least two stop bosses, which are arranged at intervals along the circumference of the output wheel structure, and at least two stop bosses correspond to and engage with at least two stop groups.

[0012] Furthermore, the multi-port switching valve also includes a valve island, which has a first port, a second port, a third port, and a fourth port; a first flow chamber is connected to the first port; wherein, the flow guiding structure has a flow guiding channel inside for guiding flow, and the valve core structure has a switching channel inside, which is connected to the flow guiding channel; when the stop boss abuts against a stop protrusion, one end of the switching channel is connected to the first port and the other end is connected to the third port; when the stop boss abuts against another stop protrusion, one end of the switching channel is connected to the first port and the other end is connected to the fourth port.

[0013] Furthermore, the drive assembly also includes a drive motor and a speed regulating gear structure. The drive motor is connected to the speed regulating gear structure. The output wheel structure has a cavity inside, and the inner wall of the cavity has annularly arranged gear teeth. The speed regulating gear structure meshes with the gear teeth. The drive motor drives the speed regulating gear structure to rotate, and the speed regulating gear structure drives the output wheel structure and the valve core structure to rotate through the gear teeth. The end of the output wheel structure facing the speed regulating gear structure has an opening that communicates with the cavity. At least a portion of the speed regulating gear structure enters the cavity through the opening. The end of the output wheel structure away from the opening is connected to the valve core structure. And / or, the output wheel structure has a mating hole. At least a portion of the connection end between the valve core structure and the output wheel structure is inserted into the mating hole and is limited to fit against the inner wall of the mating hole. The inner wall of the mating hole has at least one plane, which is used to limit the relative fixation of the valve core structure and the output wheel structure.

[0014] Furthermore, there is a first gap between the valve core structure and the flow guiding structure, and a second gap between the valve core structure and the inner wall of the mating hole. The first gap and the second gap are connected to form a first balance channel; and / or, the first flow cavity is connected to the cavity of the output wheel structure through the stop groove to form a second balance channel; the low-pressure heat exchange medium in the first flow cavity enters the cavity through the first balance channel and / or the second balance channel.

[0015] Furthermore, the upper valve cover also has a through hole that extends through the upper valve cover along its axial direction and is spaced apart from the stop groove; one end of the valve core structure passes through the through hole and is driven to connect with the drive assembly, and the valve core structure is limited to the through hole.

[0016] Furthermore, the multi-port switching valve also includes a valve island, which has an installation cavity inside. The valve island has a first port, a second port, a third port, and a fourth port. The first port and the second port are disposed on the side wall of the valve island and are spaced apart along the axial direction of the valve island. The third port and the fourth port are disposed on the bottom wall of the valve island. The valve body is disposed in the installation cavity. The first flow cavity is connected to the first port, and the second flow cavity is connected to the second port.

[0017] Furthermore, the first port is connected to the low-pressure inlet of the compressor for the flow of the heat exchange medium, the second port is connected to the high-pressure outlet of the compressor for the flow of the heat exchange medium, the third port is connected to the condenser, and the fourth port is connected to the evaporator. The flow guiding structure has a flow guiding channel inside for guiding the flow, and the valve core structure has a switching channel inside. One end of the switching channel is connected to the first port through the flow guiding channel, and the other end can be selectively connected to the third or fourth port by the rotation of the valve core structure to control the flow path of the heat exchange medium.

[0018] Furthermore, the flow guiding structure is made of non-metallic material, and the stop structure is integrally formed with the flow guiding structure; and / or, the stop groove is an arc-shaped groove that extends circumferentially along the main structure; and / or, the inner wall of the stop groove is matched with the stop structure to limit the flow guiding structure and the main structure to be relatively fixed.

[0019] Furthermore, the main structure has a stop groove, and the stop structure extends through the stop groove along the axial direction of the main structure. The extended portion is used to limit the rotation range of the drive assembly and / or valve core structure.

[0020] Furthermore, the flow guiding structure has a flow guiding channel inside for guiding flow; the valve core structure has a switching channel inside, which is connected to the flow guiding channel; the main structure has a stop groove, at least a part of the stop structure is located in the stop groove, and the stop structure is limited and matched with the inner wall of the stop groove so that the flow guiding structure and the main structure are relatively fixed.

[0021] Furthermore, the flow guiding structure has a constraint groove, and the bottom wall of the first flow cavity along the axial direction of the main structure has a constraint hole; the multi-way switching valve also includes a constraint member, one end of which passes through the constraint groove and is connected to the constraint hole, and the outer periphery of the constraint member is limited to the inner wall of the constraint groove. The constraint member is used to restrict the rotation of the flow guiding structure or to fix the flow guiding structure relative to the main structure.

[0022] Furthermore, the flow guiding structure has a constraint groove, and the inner wall of the first flow cavity has a constraint protrusion, at least a portion of which extends into the constraint groove and engages with the constraint groove to limit the rotation of the flow guiding structure; or, the flow guiding structure has a constraint protrusion, and the inner wall of the first flow cavity has a constraint groove, at least a portion of which extends into the constraint groove and engages with the constraint groove to limit the rotation of the flow guiding structure.

[0023] Furthermore, when the constraint protrusion is disposed on the inner wall of the first flow cavity, the constraint protrusion extends axially along the main structure; and / or, when the constraint protrusion is disposed on the flow guiding structure, the constraint protrusion extends axially along the flow guiding structure; and / or, there are multiple constraint protrusions, which are spaced apart on the inner wall of the flow guiding structure and / or the first flow cavity; there are multiple constraint grooves, and at least a portion of the multiple constraint protrusions corresponds and cooperates with each other.

[0024] Furthermore, the flow guiding structure has a flow guiding channel inside for guiding flow, and the valve core structure has a switching channel inside, which is connected to the flow guiding channel; the flow guiding structure has a through hole, which passes through the flow guiding structure along the axial direction of the flow guiding structure and is connected to the flow guiding channel; the valve core structure passes through the through hole and is slidably limited to the inner wall of the through hole; the connecting end of the switching channel and the flow guiding channel is located inside the through hole; the central axis of the through hole is perpendicular to the central axis of the flow guiding channel.

[0025] Applying the technical solution of this invention, this invention provides a multi-way switching valve, comprising: a switching component and a driving component. The switching component includes a main body structure, a flow guiding structure, and a valve core structure. The main body structure has a first flow cavity inside, and the flow guiding structure is disposed within the first flow cavity. The valve core structure is rotatably disposed on the main body structure, and the driving component is drivenly connected to the valve core structure for driving the valve core structure to rotate. The flow guiding structure has a stop structure, which is used to limit the rotation range of the driving component and / or the valve core structure. The stop structure is made of a non-metallic material.

[0026] This invention incorporates a stop structure within the flow guide structure. This stop structure limits the rotation range of the drive assembly and / or the valve core structure. Made of non-metallic material, the stop structure effectively limits the rotation of the metallic valve core structure while simultaneously reducing collision noise between the valve core and the stop structure, thus significantly reducing the overall noise during the operation of the multi-way switching valve. Furthermore, by incorporating the stop structure, when the main structure is made of a high-strength metallic material, the stop structure can be made of non-metallic material and machined separately from the main structure. This ensures that the main structure has sufficient strength to withstand the pressure requirements of the internal heat exchange medium while also facilitating the machining of both the flow guide and the stop structure. The flow guide structure achieves efficient connectivity between the internal switching channel and the external outlet of the valve core structure using a simple design, effectively reducing the flow resistance between the switching channel and the external outlet, thereby significantly improving the overall flow efficiency of the heat exchange medium. This invention is simple in structure, low in cost, easy to assemble and maintain, and suitable for large-scale application. Attached Figure Description

[0027] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0028] Figure 1 This diagram shows a partial internal structure schematic of a multi-way switching valve provided in an embodiment of the present invention.

[0029] Figure 2 This diagram shows a partial internal structure of a multi-way switching valve according to another embodiment of the present invention.

[0030] Figure 3 It shows Figure 2 A partial structural diagram;

[0031] Figure 4 A partial structural schematic diagram of the switching component provided in an embodiment of the present invention is shown;

[0032] Figure 5A partial structural schematic diagram of the switching component provided in an embodiment of the present invention is shown from a top view.

[0033] Figure 6 A schematic diagram of the external structure of the flow guiding structure provided in an embodiment of the present invention is shown;

[0034] Figure 7 A schematic diagram of the external structure of the upper valve cover provided in an embodiment of the present invention is shown;

[0035] Figure 8 A schematic diagram of the external structure of the output wheel structure provided in an embodiment of the present invention is shown;

[0036] Figure 9 This diagram shows the external structure of the output wheel structure provided in an embodiment of the present invention at another angle;

[0037] Figure 10 A schematic diagram of the valve body provided in an embodiment of the present invention is shown;

[0038] Figure 11 A schematic diagram of the valve body provided in an embodiment of the present invention at another angle is shown;

[0039] Figure 12 A schematic diagram of the external structure of the lower valve seat provided in an embodiment of the present invention is shown;

[0040] Figure 13 A schematic diagram of the external structure of the valve core structure provided in an embodiment of the present invention is shown;

[0041] Figure 14 A schematic diagram of the internal structure of the valve core structure provided in an embodiment of the present invention is shown;

[0042] Figure 15 A schematic diagram of the external structure of a multi-port switching valve provided in an embodiment of the present invention is shown;

[0043] The above figures include the following reference numerals:

[0044] 10. Valve island; 11. Mounting cavity; 12. First port; 13. Second port; 14. Third port; 15. Fourth port;

[0045] 20. Switching component; 23. Main structure; 231. First flow chamber; 2312. Constraint hole; 232. Second flow chamber; 233. Upper valve cover; 2332. Through hole; 234. Valve body; 235. Lower valve seat; 24. Valve core structure; 241. Switching channel; 25. Flow guiding structure; 251. Flow guiding channel; 252. Through hole; 253. Constraint groove;

[0046] 80. Drive assembly; 81. Drive motor; 82. Output wheel structure; 821. Cavity; 822. Gear teeth; 823. Mating hole; 824. Stop boss;

[0047] 110. Stop structure; 1101. Stop protrusion; 120. Stop groove. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] like Figures 1 to 15 As shown, an embodiment of the present invention provides a multi-way switching valve, including: a switching component 20 and a driving component 80. The switching component 20 includes a main body structure 23, a flow guiding structure 25, and a valve core structure 24. The main body structure 23 has a first flow cavity 231 inside, and the flow guiding structure 25 is disposed in the first flow cavity 231. The valve core structure 24 is rotatably disposed on the main body structure 23, and the driving component 80 is drivenly connected to the valve core structure 24 for driving the valve core structure 24 to rotate. The flow guiding structure 25 has a stop structure 110, which is used to limit the rotation range of the driving component 80 and / or the valve core structure 24. The stop structure 110 is made of non-metallic material.

[0050] This invention incorporates a stop structure 110 on the flow guide structure 25. The stop structure 110 limits the rotation range of the drive assembly 80 and / or the valve core structure 24. Furthermore, the stop structure 110 is made of a non-metallic material. This effectively limits the rotation of the metallic valve core structure 24 while simultaneously reducing the collision noise between the valve core structure 24 and the stop structure 110, thereby significantly reducing the overall noise during the operation of the multi-way switching valve. By including the stop structure 110, even when the main structure 23 is made of a high-strength metallic material, the stop structure 110 can be made of a non-metallic material to maintain its position relative to the main structure. The structures 23 are processed and formed separately, which not only ensures that the main structure 23 has a certain strength to meet the pressure requirements of the heat exchange medium flowing inside, but also makes the flow guiding structure 25 and the stop structure 110 easy to process and form. By setting the flow guiding structure 25, the switching channel 241 inside the valve core structure 24 and the external outlet are efficiently connected with the external outlet with a simple structure, which effectively reduces the flow resistance between the switching channel 241 and the external outlet, and thus effectively improves the overall flow efficiency of the heat exchange medium. The present invention has a simple structure and low cost, is easy to assemble and maintain, and is suitable for large-scale promotion and use.

[0051] It should be noted that in one specific embodiment of the present invention, the stop structure 110 and the flow guide structure 25 are integrally formed and made of plastic material. This not only reduces the weight of the multi-way switching valve and lowers the production cost, but also facilitates integral processing and molding.

[0052] In another specific embodiment of the present invention, the stop structure 110 may also be provided on the main body structure 23, the main body structure 23 is made of metal material, and the stop structure 110 is made of plastic material or rubber material.

[0053] like Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the main structure 23 has a stop groove 120, and at least a portion of the stop structure 110 is located in the stop groove 120; a portion of the drive assembly 80 and / or the valve core structure 24 extends into the stop groove 120, and this portion is limited and engaged with the stop structure 110.

[0054] By cooperating with the stop structure 110 and the stop groove 120 on the main structure 23, precise control of the rotation range of the valve core structure 24 is achieved, while avoiding direct collision between metal parts and further reducing noise. In actual use, the multi-way switching valve not only has low noise when switching the flow path, but also the switching action is more precise and stable. This technical solution can significantly improve the system's response speed and reliability, reduce maintenance costs, and has significant economic benefits and market competitiveness.

[0055] Alternatively, the stop structure 110 is located on the flow guide structure 25; the main body structure 23 has a stop groove 120, the stop structure 110 extends through the stop groove 120 along the axial direction of the main body structure 23, and the extended portion is used to limit the rotation range of the drive assembly 80 and / or the valve core structure 24.

[0056] like Figure 4 , Figure 7 , Figure 10 , Figure 11 and Figure 12 As shown, the main structure 23 includes an upper valve cover 233 and a valve body 234; the valve body 234 has a first flow chamber 231 and a second flow chamber 232 inside; the first flow chamber 231 is used for the flow of low-pressure heat exchange medium, and the second flow chamber 232 is used for the flow of high-pressure heat exchange medium; the upper valve cover 233 is fixedly installed at one end of the valve body 234 in the axial direction to seal the first flow chamber 231; the connection end between the drive assembly 80 and the valve core structure 24 is the drive end, the drive end is located at the upper valve cover 233, and there is a channel between the valve core structure 24 and the upper valve cover 233 that communicates with the inside of the drive end, through which the low-pressure heat exchange medium in the first flow chamber 231 enters the drive assembly 80.

[0057] The above design eliminates the need for a sealing ring between the upper valve cover 233 and the valve core structure 24. By optimizing the connection position between the drive assembly 80 and the valve core structure 24, direct contact between the high-pressure heat exchange medium and the drive assembly 80 is avoided, thus eliminating the need for an additional sealing ring to isolate the high-pressure medium, simplifying the structure, and reducing costs. In practical applications, this design reduces the assembly difficulty and production costs of the multi-way switching valve, while also lowering the rotational resistance of the valve core structure 24, improving operational reliability and stability. Specific applications include automotive air conditioning systems, residential air conditioning systems, and industrial refrigeration systems. Particularly in situations where high-pressure media can easily affect the drive assembly 80, such as high-temperature and high-pressure heat pump systems, this technical solution can significantly improve the long-term operating performance and economic efficiency of the equipment.

[0058] Additionally, it should be noted that the terms "high pressure" and "low pressure" in the definition of high-pressure heat exchange medium and low-pressure heat exchange medium in this invention are relative concepts, meaning that the pressure of the heat exchange medium flowing in the first flow chamber 231 is lower than the pressure of the heat exchange medium flowing in the second flow chamber 232. Of course, under normal circumstances, the temperature of the heat exchange medium flowing in the first flow chamber 231 is also lower than the temperature of the heat exchange medium flowing in the second flow chamber 232.

[0059] In a specific embodiment of the present invention, the main structure 23 includes an upper valve cover 233, a valve body 234, and a lower valve seat 235; the valve body 234 has a first flow cavity 231 and a second flow cavity 232 inside; the upper valve cover 233 is fixedly disposed at one end of the valve body 234 in the axial direction for sealing the first flow cavity 231; the lower valve seat 235 is fixedly disposed at the other end of the valve body 234 in the axial direction for sealing the second flow cavity 232; the connection end between the drive assembly 80 and the valve core structure 24 is the drive end, the drive end is located at the upper valve cover 233, and there is no sealing ring between the upper valve cover 233 and the valve core structure 24.

[0060] like Figure 4 , Figure 5 and Figure 7 As shown, the upper valve cover 233 has a stop groove 120, which extends through the upper valve cover 233 along its axial direction; the drive assembly 80 includes an output wheel structure 82, which is located at the drive end and connected to the valve core structure 24; wherein, a portion of the output wheel structure 82 extends into the stop groove 120, and this portion is matched with the stop structure 110 to limit the rotation range of the valve core structure 24.

[0061] By using the limiting cooperation between the stop structure 110 and the output wheel structure 82, precise control of the rotation range of the valve core structure 24 is achieved, while avoiding direct contact between metal parts, reducing wear and noise. In actual use, the multi-way switching valve not only operates precisely when switching flow paths, but also has low noise and minimal wear, extending the service life of the equipment.

[0062] In one specific embodiment of the present invention, the upper valve cover 233 has a stop groove 120, which extends through the upper valve cover 233 along the axial direction of the upper valve cover 233; the drive assembly 80 includes an output wheel structure 82, which is located at the drive end and connected to the valve core structure 24; wherein, the stop structure 110 extends through the stop groove 120 and engages with the output wheel structure 82 to limit the rotation range of the valve core structure 24.

[0063] In another specific embodiment of the present invention, the drive assembly 80 includes a drive motor 81, a speed regulating gear structure, and an output wheel structure 82. The drive motor 81 is connected to the speed regulating gear structure. The output wheel structure 82 has a cavity 821 inside, and the inner wall of the cavity 821 has annularly arranged gear teeth 822. At least a portion of the speed regulating gear structure is disposed in the cavity 821 and meshes with the gear teeth 822. The output wheel structure 82 is connected to the valve core structure 24. The drive motor 81 drives the speed regulating gear structure to rotate, and the speed regulating gear structure drives the output wheel structure 82 and the valve core structure 24 to rotate through the gear teeth 822. The stop structure 110 extends through the stop groove 120 and engages with the output wheel structure 82 to limit the rotation range of the valve core structure 24.

[0064] like Figure 1 , Figure 8 and Figure 9 As shown, the output wheel structure 82 has a stop boss 824 at one end facing the valve core structure 24, and a portion of the stop boss 824 extends into the stop groove 120; the stop structure 110 includes at least two spaced stop protrusions 1101, and the stop boss 824 is located between the two stop protrusions 1101; the two stop protrusions 1101 are located in the stop groove 120 and respectively cooperate with the stop boss 824 to limit the rotation range of the output wheel structure 82, and the circumferential spacing angle of the two stop protrusions 1101 corresponds to the rotation angle range of the output wheel structure 82.

[0065] By limiting the stop protrusion 1101 and the stop boss 824, precise control of the rotation range of the output wheel structure 82 is achieved, ensuring the accuracy and stability of the valve core structure 24 when switching the flow path. In actual use, the multi-way switching valve operates more precisely and the switching process is more stable when switching the flow path, reducing system failures caused by inaccurate switching. The above technical solution can significantly improve the control accuracy and reliability of the equipment, reduce the system failure rate, and improve the overall operating efficiency.

[0066] In one specific embodiment of the present invention, the output wheel structure 82 has a stop boss 824 at one end facing the valve core structure 24. The stop structure 110 includes at least two spaced stop protrusions 1101, and the stop boss 824 is located between the two stop protrusions 1101. The two stop protrusions 1101 extend through the stop groove 120 and respectively engage with the stop boss 824 to limit the rotation range of the output wheel structure 82. The circumferential spacing angle of the two stop protrusions 1101 corresponds to the rotation angle range of the output wheel structure 82.

[0067] like Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 9 As shown, two spaced-apart stop protrusions 1101 constitute a stop group, and there are at least two stop groups, which are spaced apart circumferentially along the guide structure 25; there are at least two stop grooves 120, which are spaced apart circumferentially along the upper valve cover 233, and at least a portion of the stop grooves 120 corresponds to at least two stop groups; there are at least two stop bosses 824, which are spaced apart circumferentially along the output wheel structure 82, and at least two stop bosses 824 correspond to at least two stop groups.

[0068] By cooperating with multiple stop groups and stop grooves 120, more reliable limiting of the rotation range of the valve core structure 24 and the output wheel structure 82 is achieved, improving the reliability and stability of the limiting. In actual use, the multi-way switching valve provides more reliable limiting and a more stable switching process when switching flow paths, reducing system failures caused by limiting failure.

[0069] like Figure 2 , Figure 13 , Figure 14 and Figure 15 As shown, the multi-port switching valve also includes a valve island 10, which has a first port 12, a second port 13, a third port 14, and a fourth port 15; the first flow chamber 231 is connected to the first port 12; wherein, the flow guiding structure 25 has a flow guiding channel 251 for guiding flow inside, and the valve core structure 24 has a switching channel 241 inside, which is connected to the flow guiding channel 251; when the stop boss 824 abuts against a stop protrusion 1101, one end of the switching channel 241 is connected to the first port 12, and the other end is connected to the third port 14; when the stop boss 824 abuts against another stop protrusion 1101, one end of the switching channel 241 is connected to the first port 12, and the other end is connected to the fourth port 15.

[0070] The switching channel 241 inside the valve core structure 24 is connected to the flow guiding channel 251 inside the flow guiding structure 25, thus enabling the switching of the heat exchange medium flow path. Simultaneously, the stop structure 110 limits the rotation range of the valve core structure 24, ensuring the accuracy and stability of the flow path switching. In practical use, this makes the multi-way switching valve more precise and stable when switching flow paths, reducing system failures caused by inaccurate switching.

[0071] like Figure 1 , Figure 2 , Figure 3 , Figure 8 and Figure 9As shown, the drive assembly 80 also includes a drive motor 81 and a speed regulating gear structure. The drive motor 81 is connected to the speed regulating gear structure. The output wheel structure 82 has a cavity 821 inside, and the inner wall of the cavity 821 has annularly arranged gear teeth 822. The speed regulating gear structure meshes with the gear teeth 822. The drive motor 81 drives the speed regulating gear structure to rotate, and the speed regulating gear structure drives the output wheel structure 82 and the valve core structure 24 to rotate through the gear teeth 822. The end of the output wheel structure 82 facing the speed regulating gear structure has an opening, which is connected to the speed regulating gear structure. The cavity 821 is connected, and at least a portion of the speed regulating gear structure enters the cavity 821 through the opening. The end of the output wheel structure 82 away from the opening is connected to the valve core structure 24; and / or, the output wheel structure 82 has a mating hole 823, and at least a portion of the connection end of the valve core structure 24 and the output wheel structure 82 is inserted into the mating hole 823 and is limited to fit with the inner wall of the mating hole 823. The inner wall of the mating hole 823 has at least one plane, which is used to limit the relative fixation of the valve core structure 24 and the output wheel structure 82.

[0072] The drive motor 81 drives the speed-regulating gear structure, which in turn drives the output wheel structure 82 and the valve core structure 24 to rotate, thus switching the flow path of the heat exchange medium. Simultaneously, the inner wall of the mating hole 823 engages with the valve core structure 24 to ensure its stability during rotation, preventing inaccurate flow path switching due to unstable rotation. This technical solution significantly improves the control precision and reliability of the valve core structure 24's rotation drive, reduces the system failure rate, and enhances overall operating efficiency.

[0073] like Figure 1 , Figure 2 and Figure 3 As shown, there is a first gap between the valve core structure 24 and the flow guide structure 25, and a second gap between the valve core structure 24 and the inner wall of the mating hole 823. The first gap and the second gap are connected to form a first balance channel; and / or, the first flow cavity 231 is connected to the cavity 821 of the output wheel structure 82 through the stop groove 120 to form a second balance channel; the low-pressure heat exchange medium in the first flow cavity 231 enters the cavity 821 through the first balance channel and / or the second balance channel.

[0074] By setting up the first and second balancing channels, the pressure at both ends of the valve core structure 24 is balanced, reducing the resistance of the valve core structure 24 during rotation, thereby reducing the load on the drive assembly 80 and extending the service life of the equipment. This design makes the multi-way switching valve operate more smoothly and stably when switching flow paths, reducing additional wear on the drive assembly 80 and extending the service life of the equipment.

[0075] like Figure 4 and Figure 7As shown, the upper valve cover 233 also has a through hole 2332, which passes through the upper valve cover 233 along the axial direction of the upper valve cover 233 and is spaced apart from the stop groove 120; one end of the valve core structure 24 passes through the through hole 2332 and is driven to connect with the drive assembly 80, and the valve core structure 24 and the through hole 2332 are matched for limiting.

[0076] The through hole 2332 simplifies the connection between the valve core structure 24 and the drive assembly 80. Simultaneously, the limiting mechanism ensures the stability of the valve core structure 24 during rotation, preventing inaccurate flow path switching due to unstable rotation. This design makes the multi-way switching valve more precise and stable when switching flow paths, reducing system malfunctions caused by inaccurate switching. Furthermore, this design facilitates quick assembly and disassembly of the valve core structure 24 from the upper valve cover 233 and the drive assembly 80.

[0077] like Figure 2 and Figure 15 As shown, the multi-port switching valve also includes a valve island 10, which has an installation cavity 11 inside. The valve island 10 has a first port 12, a second port 13, a third port 14, and a fourth port 15. The first port 12 and the second port 13 are disposed on the side wall of the valve island 10 and are spaced apart along the axial direction of the valve island 10. The third port 14 and the fourth port 15 are disposed on the bottom wall of the valve island 10. The valve body 234 is disposed in the installation cavity 11. The first flow cavity 231 is connected to the first port 12, and the second flow cavity 232 is connected to the second port 13.

[0078] In the multi-port switching valve of the present invention, the valve island 10 serves as the core support structure of the entire valve. Its internal design includes an installation cavity 11 for accommodating and fixing the main structure 23 and other related components, thereby achieving the compactness and stability of the valve's internal structure. The valve island 10 has a first port 12 and a second port 13 on its side wall, which are arranged at intervals along the axial direction of the valve island. The third port 14 and the fourth port 15 are located on the bottom wall of the valve island 10. The ingenuity of this design lies in the fact that it not only optimizes the spatial layout of the valve and ensures that the heat exchange medium can smoothly enter and exit, but also facilitates the subsequent sealing of the first port 12 and the second port 13 respectively.

[0079] Specifically, the first port 12 is connected to the low-pressure inlet of the compressor for the flow of heat exchange medium, the second port 13 is connected to the high-pressure outlet of the compressor for the flow of heat exchange medium, the third port 14 is connected to the condenser, and the fourth port 15 is connected to the evaporator. The flow guiding structure 25 has a flow guiding channel 251 for guiding the flow, and the valve core structure 24 has a switching channel 241. One end of the switching channel 241 is connected to the first port 12 through the flow guiding channel 251, and the other end can be selectively connected to the third port 14 or the fourth port 15 through the rotation of the valve core structure 24 to control the flow path of the heat exchange medium.

[0080] This configuration optimizes the flow path of the heat exchange medium, improving the efficiency and accuracy of valve switching. By controlling the flow direction of the heat exchange medium, it can quickly respond to the switching needs of cooling and heating modes, providing an efficient and reliable fluid path switching mechanism for automotive air conditioning and refrigeration systems.

[0081] like Figure 7 As shown, the flow guiding structure 25 is made of non-metallic material, and the stop structure 110 is integrally formed with the flow guiding structure 25; and / or, the stop groove 120 is an arc-shaped groove and extends along the circumference of the main structure 23; and / or, the inner wall of the stop groove 120 is matched with the stop structure 110 to limit the flow guiding structure 25 and the main structure 23 to be relatively fixed.

[0082] The use of non-metallic materials reduces the noise level of the device during operation, improves the smoothness of operation and user comfort; the one-piece molded stop structure not only enhances the stability of the structure, but also simplifies the production process, reduces manufacturing costs, and ensures precise control of the rotation range of the valve core structure and drive components.

[0083] Specifically, such as Figure 1 , Figure 4 and Figure 5 As shown, the flow guiding structure 25 has a flow guiding channel 251 inside for guiding flow; the valve core structure 24 has a switching channel 241 inside, which is connected to the flow guiding channel 251; the main body structure 23 has a stop groove 120, at least a part of the stop structure 110 is located in the stop groove 120, and the stop structure 110 is limited to the inner wall of the stop groove so that the flow guiding structure 25 and the main body structure 23 are relatively fixed.

[0084] With the above settings, not only can reliable flow guidance of the heat exchange medium in the switching channel 241 be achieved with a simple structure, but reliable fixation between the flow guiding structure 25 and the main structure 23 can also be achieved through the cooperation of the stop structure 110 and the stop groove 120.

[0085] Specifically, such as Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, the main structure 23 includes an upper valve cover 233 and a valve body 234; the valve body 234 has a first flow chamber 231 and a second flow chamber 232 inside; the first flow chamber 231 is used for the flow of low-pressure heat exchange medium, and the second flow chamber 232 is used for the flow of high-pressure heat exchange medium; one end of the upper valve cover 233 is inserted into the first flow chamber 231 and is limited to the inner wall of the first flow chamber 231; the upper valve cover 233 has a stop groove 120; the stop structure 110 includes at least two spaced stop protrusions 1101, the two stop protrusions 1101 are located in the stop groove 120 and are respectively limited to the inner walls at both ends of the stop groove 120, so that the flow guiding structure 25 is relatively fixed to the upper valve cover 233.

[0086] By setting two stop protrusions 1101 located in the stop groove 120 and respectively engaging with the inner walls at both ends of the stop groove 120, the relative fixation of the flow guide structure 25 and the upper valve cover 233 is achieved, and the rotation range of the valve core structure 24 is reliably constrained.

[0087] like Figure 2 and Figure 15 As shown, in a specific embodiment of the present invention, the multi-port switching valve further includes a valve island 10; the valve island 10 has a first port 12, a second port 13, a third port 14 and a fourth port 15, the first port 12 is used for flowing low-pressure heat exchange medium, and the second port 13 is used for flowing high-pressure heat exchange medium; the flow guiding structure 25 has a flow guiding channel 251 inside for guiding flow, and the flow guiding channel 251 is connected to the first port 12; the valve core structure 24 is used to switch one of the first port 12 and the second port 13 to be connected to one of the third port 14 and the fourth port 15; wherein, the connection end between the drive assembly 80 and the valve core structure 24 is the drive end, and the drive end is located at the end of the main structure 23 near the first port 12.

[0088] By positioning the connection end between the drive assembly 80 and the valve core structure 24 at the end of the main structure 23 near the first port 12, the high-pressure heat exchange medium is prevented from entering the drive assembly 80, thus avoiding any adverse effects of the high-pressure heat exchange medium on the magnetism of the motor rotor and stator. This allows the drive assembly 80 to operate stably, thereby ensuring the operational stability of the four-way valve. Furthermore, by facilitating the flow of the low-pressure heat exchange medium through the first port 12 and positioning the connection end between the drive assembly 80 and the valve core structure 24 near the first port 12, the characteristic that the low-pressure heat exchange medium does not adversely affect the magnetism of the motor rotor and stator in the drive assembly 80 is cleverly utilized, ensuring a stable connection between the drive assembly 80 and the valve core structure 24. The connection end does not require additional sealing rings. Compared with the existing technology that uses multiple sealing rings to seal the valve core, this invention significantly reduces the number of sealing rings on the outer circumference of the valve core structure 24, thereby significantly reducing the resistance when the valve core structure 24 rotates, reducing the load torque and additional wear when the drive assembly 80 drives the valve core structure 24 to rotate, and thus improving the service life and operational reliability of the multi-way switching valve. By optimizing the position of the connection end between the drive assembly 80 and the valve core structure 24, this invention simplifies the number of sealing rings, not only reducing the number of parts, but also reducing the overall rotational resistance, making the switching action of the multi-way switching valve more reliable and smooth.

[0089] Specifically, the first flow cavity 231 is connected to the interior of the drive end to form a balance channel, and the low-pressure heat exchange medium flowing in the first port 12 enters the drive assembly 80 through the balance channel.

[0090] By setting the first flow cavity 231 to be connected to the inside of the drive end to form a balance channel, the low-pressure heat exchange medium can enter the drive assembly 80 through the balance channel to balance the internal and external pressures, thereby avoiding the influence of the high-pressure medium on the magnetism of the motor rotor and stator, ensuring the long-term working stability and reliability of the drive assembly 80, enabling the multi-way switching valve to operate stably and reducing valve maintenance costs.

[0091] In one specific embodiment of the present invention, there is a first gap between the valve core structure 24 and the flow guiding structure 25, and a second gap between the driving end and the valve core structure 24. The first gap and the second gap are connected to form part of the balance channel.

[0092] By setting the first gap, the motion interference of the flow guiding structure 25 to the valve core structure 24 is avoided, and the low-pressure heat exchange medium can enter the drive assembly 80 through the balance channel.

[0093] like Figure 6 and Figure 10As shown, the flow guiding structure 25 has a constraint groove 253, and the first flow cavity 231 has a constraint hole 2312 on the bottom wall along the axial direction of the main structure 23. The multi-way switching valve also includes a constraint member, one end of which passes through the constraint groove 253 and is connected to the constraint hole 2312. The outer periphery of the constraint member is limited and matched with the inner wall of the constraint groove 253. The constraint member is used to restrict the rotation of the flow guiding structure 25 or to fix the flow guiding structure 25 relative to the main structure 23.

[0094] By setting the constraint groove 253, constraint hole 2312 and constraint component in combination, the stability and positioning accuracy between the flow guide structure 25 and the main structure 23 are enhanced, unnecessary rotation of the flow guide structure 25 is avoided, thereby reducing wear inside the valve and improving the valve's operating efficiency and reliability.

[0095] Optionally, the flow guiding structure 25 has a constraint groove 253, and the inner wall of the first flow cavity 231 has a constraint protrusion. At least a portion of the constraint protrusion extends into the constraint groove 253 and is matched with the constraint groove 253 to limit the rotation of the flow guiding structure 25; or, the flow guiding structure 25 has a constraint protrusion, and the inner wall of the first flow cavity 231 has a constraint groove 253. At least a portion of the constraint protrusion extends into the constraint groove 253 and is matched with the constraint groove 253 to limit the rotation of the flow guiding structure 25.

[0096] By setting a constraint protrusion to cooperate with the constraint groove 253, a reliable limit of the flow guiding structure 25 is achieved with a simple structure. It also simplifies the internal structural design of the valve, improves assembly efficiency, enhances the stability of the flow guiding structure 25, and avoids fluid leakage and reduced flow efficiency caused by structural loosening.

[0097] Specifically, when the constraint protrusion is disposed on the inner wall of the first flow cavity 231, the constraint protrusion extends axially along the main structure 23; and / or, when the constraint protrusion is disposed on the flow guiding structure 25, the constraint protrusion extends axially along the flow guiding structure 25; and / or, there are multiple constraint protrusions, which are spaced apart on the inner wall of the flow guiding structure 25 and / or the first flow cavity 231; there are multiple constraint grooves 253, and at least a portion of the multiple constraint protrusions corresponds and cooperates with each other.

[0098] This design effectively optimizes the structural layout of the constraint protrusions and constraint grooves 253, further improving the stability and reliability of the internal structure of the multi-way switching valve.

[0099] like Figure 1 , Figure 4 , Figure 5 and Figure 6As shown, the flow guiding structure 25 has a flow guiding channel 251 inside for guiding flow, and the valve core structure 24 has a switching channel 241 inside, which is connected to the flow guiding channel 251; the flow guiding structure 25 has a through hole 252, which passes through the flow guiding structure 25 along the axial direction of the flow guiding structure 25 and is connected to the flow guiding channel 251; the valve core structure 24 passes through the through hole 252 and is slidably limited to the inner wall of the through hole 252; the connecting end of the switching channel 241 and the flow guiding channel 251 is located inside the through hole 252; the central axis of the through hole 252 is perpendicular to the central axis of the flow guiding channel 251.

[0100] The above design optimizes the flow path of the heat exchange medium, reduces the resistance of fluid flow, and improves the response speed and switching efficiency of the multi-way switching valve. At the same time, it ensures the precise alignment between the valve core structure 24 and the flow guide structure 25, improves the control accuracy and operational reliability of the valve, and provides the system with fast and accurate fluid path control.

[0101] The specific working process and principle of one embodiment of the present invention will now be described in detail as follows:

[0102] During operation, the multi-way switching valve primarily switches the flow path of the heat exchange medium by rotating the valve core structure 24, thereby switching between cooling and heating modes. The specific steps are as follows:

[0103] Cooling mode switching: When cooling mode is required, the drive motor 81 starts, which drives the speed regulating gear structure to rotate. Then, through the meshing of the gear teeth 822 with the cavity 821 inside the output wheel structure 82, the output wheel structure 82 and the valve core structure 24 are driven to rotate. The stop boss 824 of the output wheel structure 82 contacts the stop protrusion 1101, limiting the rotation range of the valve core structure 24. When the stop boss 824 abuts against one of the stop protrusions 1101, one end of the switching channel 241 inside the valve core structure 24 is connected to the first port 12, and the other end is connected to the third port 14, so that the low-pressure heat exchange medium flows out from the first port 12. During this process, the heat exchange medium flows through the second flow chamber 232 and the first flow chamber 231. Due to the sealing effect of the upper valve cover 233 and the lower valve seat 235, the isolation and sealing of the flow path are ensured. The mating hole 823 of the output wheel structure 82 is matched with the valve core structure 24, ensuring the relative fixation of the valve core structure 24 and the output wheel structure 82, thereby achieving precise fluid path control.

[0104] Heating mode switching: In heating mode, the drive motor 81 drives the output wheel structure 82 and the valve core structure 24 to another limit position. At this time, the stop boss 824 abuts against another stop protrusion 1101. One end of the switching channel 241 is still connected to the first port 12, but the other end is connected to the fourth port 15. Similarly, through the sealing effect of the upper valve cover 233 and the lower valve seat 235, as well as the limiting cooperation between the output wheel structure 82 and the valve core structure 24, the switching and control of the fluid path are realized.

[0105] In order to reduce the noise of the valve core structure 24, the present invention sets the stop structure 110 to be made of non-metallic material, so that when the stop structure 110 comes into contact with the metal output wheel structure 82 and the valve core structure 24, the collision noise is greatly reduced, thereby reducing the overall noise during the operation of the multi-way switching valve.

[0106] To improve the reliability of the drive motor 81, the flow paths of the drive motor 81 and the high-pressure heat exchange medium are separated, avoiding the influence of the high-pressure heat exchange medium on the motor, improving the stability of the drive assembly 80, and thus improving the reliability of the multi-way switching valve. At the same time, it also reduces the number of sealing rings at the connection between the valve core structure 24 and the drive assembly 80, reduces rotational resistance, reduces the load torque and additional wear of the motor, and extends the service life of the multi-way switching valve.

[0107] To optimize the fluid path, a flow guiding structure 25 is provided, whose internal flow guiding channel 251 is connected to the switching channel 241 inside the valve core structure 24, which simplifies fluid path control, reduces fluid resistance, and improves heat exchange efficiency.

[0108] To balance the pressure, a balancing channel is formed by the through hole 2332 on the upper valve cover 233, the gap between the valve core structure 24 and the flow guide structure 25, and the gap between the valve core structure 24 and the output wheel structure 82. This channel is used to introduce the low-pressure heat exchange medium into the drive assembly 80, which not only balances the pressure inside and outside the drive assembly 80, but also avoids the adverse effects of the high-temperature and high-pressure heat exchange medium on the drive assembly 80.

[0109] To simplify the structure and reduce costs, this invention simplifies the structure of the multi-way switching valve by optimizing the design and reducing the number of sealing rings, thereby reducing assembly difficulty and maintenance costs. At the same time, the non-metallic stop structure 110 reduces processing costs, thus improving the overall market competitiveness of the product.

[0110] Therefore, the multi-way switching valve provided by this invention effectively solves the problems of noise, reliability, and fluid resistance in the prior art through optimized structural design and material selection, improving the overall performance and service life of the multi-way switching valve, reducing maintenance costs, and exhibiting significant economic benefits and market competitiveness. The multi-way switching valve proposed in this invention has a simple structure and reliable operation, making it suitable for use in various applications requiring frequent switching of flow paths, such as automotive air conditioning systems and refrigeration systems, significantly improving system response speed and reliability. Furthermore, by reducing the use of sealing rings, equipment maintenance costs and failure rates are also reduced, resulting in higher economic benefits for the multi-way switching valve of this application during long-term operation.

[0111] In summary, this invention provides a multi-way switching valve. By incorporating a stop structure 110 on the flow guide structure 25, the stop structure 110 limits the rotation range of the drive assembly 80 and / or the valve core structure 24. Furthermore, the stop structure 110 is made of a non-metallic material, effectively limiting the rotation of the metallic valve core structure 24 while simultaneously reducing the collision noise between the valve core structure 24 and the stop structure 110, thereby effectively reducing the overall noise during the operation of the multi-way switching valve. By including the stop structure 110, even when the main structure 23 is made of a high-strength metallic material, the stop structure 110 can... The main structure 23 is made of non-metallic material and processed separately, which ensures that the main structure 23 has a certain strength to meet the pressure requirements of the heat exchange medium flowing inside, and makes the flow guiding structure 25 and the stop structure 110 easy to process and form. By setting the flow guiding structure 25, the switching channel 241 inside the valve core structure 24 and the external outlet are efficiently connected with the external outlet with a simple structure, which effectively reduces the flow resistance between the switching channel 241 and the external outlet, thereby effectively improving the overall flow efficiency of the heat exchange medium. The present invention has a simple structure and low cost, is easy to assemble and maintain, and is suitable for large-scale promotion and use.

[0112] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0113] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0114] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0115] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, and the spatial relative descriptions used herein will be interpreted accordingly.

[0116] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0117] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A multi-port switching valve, characterized in that, include: The switching component (20) and the driving component (80) are provided. The switching component (20) includes a main structure (23), a flow guide structure (25), and a valve core structure (24). The main structure (23) has a first flow cavity (231) inside, and the flow guide structure (25) is disposed in the first flow cavity (231). The valve core structure (24) is rotatably disposed on the main structure (23), and the driving component (80) is drivenly connected to the valve core structure (24) to drive the valve core structure (24) to rotate. The flow guide structure (25) has a stop structure (110) to limit the rotation range of the driving component (80) and / or the valve core structure (24). The stop structure (110) is made of non-metallic material.

2. The multi-port switching valve according to claim 1, characterized in that, The main structure (23) has a stop groove (120), at least a portion of the stop structure (110) is located in the stop groove (120); a portion of the drive assembly (80) and / or the valve core structure (24) extends into the stop groove (120), and the portion is in a limiting fit with the stop structure (110).

3. The multi-port switching valve according to claim 2, characterized in that, The main structure (23) includes an upper valve cover (233) and a valve body (234); the valve body (234) has a first flow chamber (231) and a second flow chamber (232) inside; the first flow chamber (231) is used to flow low-pressure heat exchange medium, and the second flow chamber (232) is used to flow high-pressure heat exchange medium; the upper valve cover (233) is fixedly disposed at one end of the valve body (234) in the axial direction and is used to seal the first flow chamber (231); the connection end between the drive assembly (80) and the valve core structure (24) is the drive end, the drive end is located at the upper valve cover (233), and there is a channel between the valve core structure (24) and the upper valve cover (233) communicating with the interior of the drive end, through which the low-pressure heat exchange medium in the first flow chamber (231) enters the drive assembly (80).

4. The multi-port switching valve according to claim 3, characterized in that, The upper valve cover (233) has the stop groove (120), which extends through the upper valve cover (233) along the axial direction of the upper valve cover (233); the drive assembly (80) includes an output wheel structure (82), which is located at the drive end and connected to the valve core structure (24); wherein a portion of the output wheel structure (82) extends into the stop groove (120), and this portion is matched with the stop structure (110) to limit the rotation range of the valve core structure (24).

5. The multi-port switching valve according to claim 4, characterized in that, The output wheel structure (82) has a stop boss (824) at one end facing the valve core structure (24), a portion of which extends into the stop groove (120). The stop structure (110) includes at least two spaced stop protrusions (1101), with the stop boss (824) located between the two stop protrusions (1101). The two stop protrusions (1101) are located within the stop groove (120) and respectively engage with the stop boss (824) to limit the rotation range of the output wheel structure (82). The circumferential spacing angle of the two stop protrusions (1101) corresponds to the rotation angle range of the output wheel structure (82).

6. The multi-port switching valve according to claim 5, characterized in that, Two spaced-apart stop protrusions (1101) constitute a stop group, and there are at least two stop groups, which are spaced apart circumferentially along the flow guide structure (25); there are at least two stop grooves (120), which are spaced apart circumferentially along the upper valve cover (233), and at least a portion of the stop grooves (120) corresponds to at least two stop groups; there are at least two stop bosses (824), which are spaced apart circumferentially along the output wheel structure (82), and at least two stop bosses (824) correspond to at least two stop groups.

7. The multi-port switching valve according to claim 5, characterized in that, The multi-port switching valve further includes a valve island (10), which has a first port (12), a second port (13), a third port (14), and a fourth port (15); the first flow cavity (231) is connected to the first port (12); wherein, the flow guiding structure (25) has a flow guiding channel (251) for guiding flow inside, and the valve core structure (24) has a switching channel (241) inside, which is connected to the flow guiding channel (251); when the stop boss (824) abuts against one of the stop protrusions (1101), one end of the switching channel (241) is connected to the first port (12), and the other end is connected to the third port (14); when the stop boss (824) abuts against another of the stop protrusions (1101), one end of the switching channel (241) is connected to the first port (12), and the other end is connected to the fourth port (15).

8. The multi-port switching valve according to claim 4, characterized in that, The drive assembly (80) further includes a drive motor (81) and a speed regulating gear structure. The drive motor (81) is connected to the speed regulating gear structure. The output wheel structure (82) has a cavity (821) inside. The inner wall of the cavity (821) has annularly arranged gear teeth (822). The speed regulating gear structure meshes with the gear teeth (822). The drive motor (81) drives the speed regulating gear structure to rotate. The speed regulating gear structure drives the output wheel structure (82) and the valve core structure (24) to rotate through the gear teeth (822). The output wheel structure (82) has an opening at one end facing the speed regulating gear structure. The opening is connected to the output wheel structure (82) and the speed regulating gear structure (24). The cavity (821) is connected, and at least a portion of the speed regulating gear structure enters the cavity (821) through the opening. The end of the output wheel structure (82) away from the opening is connected to the valve core structure (24); and / or, the output wheel structure (82) has a mating hole (823), and at least a portion of the connection end of the valve core structure (24) and the output wheel structure (82) is inserted into the mating hole (823) and is limited to fit with the inner wall of the mating hole (823). The inner wall of the mating hole (823) has at least one plane, which is used to limit the relative fixation of the valve core structure (24) and the output wheel structure (82).

9. The multi-port switching valve according to claim 8, characterized in that, There is a first gap between the valve core structure (24) and the flow guiding structure (25), and there is a second gap between the valve core structure (24) and the inner wall of the mating hole (823). The first gap and the second gap are connected to form a first balance channel. And / or, the first flow cavity (231) is connected to the cavity (821) of the output wheel structure (82) through the stop groove (120) to form a second balance channel; The low-pressure heat exchange medium in the first flow cavity (231) enters the cavity (821) through the first balance channel and / or the second balance channel.

10. The multi-port switching valve according to claim 4, characterized in that, The upper valve cover (233) also has a through hole (2332), which passes through the upper valve cover (233) along the axial direction and is spaced apart from the stop groove (120); one end of the valve core structure (24) passes through the through hole (2332) and is driven to connect with the drive assembly (80), and the valve core structure (24) is limited to the through hole (2332).

11. The multi-port switching valve according to claim 3, characterized in that, The multi-port switching valve further includes a valve island (10), which has an installation cavity (11) inside. The valve island (10) has a first port (12), a second port (13), a third port (14), and a fourth port (15). The first port (12) and the second port (13) are disposed on the side wall of the valve island (10) and are spaced apart along the axial direction of the valve island (10). The third port (14) and the fourth port (15) are disposed on the bottom wall of the valve island (10). The valve body (234) is disposed in the installation cavity (11). The first flow cavity (231) is connected to the first port (12), and the second flow cavity (232) is connected to the second port (13).

12. The multi-port switching valve according to claim 11, characterized in that, The first port (12) is connected to the low-pressure inlet of the compressor for the flow of heat exchange medium, and the second port (13) is connected to the high-pressure outlet of the compressor for the flow of heat exchange medium; the third port (14) is connected to the condenser, and the fourth port (15) is connected to the evaporator; wherein, the flow guiding structure (25) has a flow guiding channel (251) for guiding flow inside, and the valve core structure (24) has a switching channel (241) inside. One end of the switching channel (241) is connected to the first port (12) through the flow guiding channel (251), and the other end can be selectively connected to the third port (14) or the fourth port (15) through the rotation of the valve core structure (24) to control the flow path of the heat exchange medium.

13. The multi-port switching valve according to claim 2, characterized in that, The flow guiding structure (25) is made of non-metallic material, and the stop structure (110) is integrally formed with the flow guiding structure (25); And / or, the stop groove (120) is an arc-shaped groove and extends circumferentially along the main structure (23); And / or, the inner wall of the stop groove (120) is matched with the stop structure (110) to limit the flow guide structure (25) and the main structure (23) to be relatively fixed.

14. The multi-port switching valve according to claim 1, characterized in that, The main structure (23) has a stop groove (120), and the stop structure (110) extends through the stop groove (120) along the axial direction of the main structure (23). The extended portion is used to limit the rotation range of the drive assembly (80) and / or the valve core structure (24).

15. The multi-port switching valve according to claim 1, characterized in that, The flow guiding structure (25) has a flow guiding channel (251) inside for guiding flow; the valve core structure (24) has a switching channel (241) inside, and the switching channel (241) is connected to the flow guiding channel (251); the main body structure (23) has a stop groove (120), at least a part of the stop structure (110) is located in the stop groove (120), and the stop structure (110) is limited to the inner wall of the stop groove so that the flow guiding structure (25) and the main body structure (23) are relatively fixed.

16. The multi-port switching valve according to claim 1, characterized in that, The flow guiding structure (25) has a constraint groove (253), and the first flow cavity (231) has a constraint hole (2312) on the bottom wall along the axial direction of the main structure (23). The multi-way switching valve also includes a constraint member, one end of which passes through the constraint groove (253) and is connected to the constraint hole (2312). The outer periphery of the constraint member is limited to the inner wall of the constraint groove (253). The constraint member is used to restrict the rotation of the flow guiding structure (25) or to fix the flow guiding structure (25) relative to the main structure (23).

17. The multi-port switching valve according to claim 1, characterized in that, The flow guiding structure (25) has a constraint groove (253), and the inner wall of the first flow cavity (231) has a constraint protrusion. At least a portion of the constraint protrusion extends into the constraint groove (253) and is matched with the constraint groove (253) to limit the rotation of the flow guiding structure (25). Alternatively, the flow guiding structure (25) has a constraint protrusion, and the inner wall of the first flow cavity (231) has a constraint groove (253). At least a portion of the constraint protrusion extends into the constraint groove (253) and is matched with the constraint groove (253) to limit the rotation of the flow guiding structure (25).

18. The multi-port switching valve according to claim 17, characterized in that, When the constraint protrusion is disposed on the inner wall of the first flow cavity (231), the constraint protrusion extends axially along the main structure (23); and / or, when the constraint protrusion is disposed on the flow guiding structure (25), the constraint protrusion extends axially along the flow guiding structure (25); and / or, there are multiple constraint protrusions, and the multiple constraint protrusions are spaced apart on the inner wall of the flow guiding structure (25) and / or the first flow cavity (231); there are multiple constraint grooves (253), and the multiple constraint protrusions correspond one-to-one with at least a portion of the multiple constraint grooves (253).

19. The multi-port switching valve according to claim 1, characterized in that, The flow guiding structure (25) has a flow guiding channel (251) inside for guiding flow, and the valve core structure (24) has a switching channel (241) inside, which is connected to the flow guiding channel (251); the flow guiding structure (25) has a through hole (252), which passes through the flow guiding structure (25) along the axial direction of the flow guiding structure (25) and is connected to the flow guiding channel (251); the valve core structure (24) passes through the through hole (252) and is slidably limited to the inner wall of the through hole (252); the connecting end of the switching channel (241) and the flow guiding channel (251) is located inside the through hole (252); the central axis of the through hole (252) is perpendicular to the central axis of the flow guiding channel (251).

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