Valve core assembly, multi-way valve and valve core assembly machining method

Abstract

A valve core assembly, a multi-way valve and a valve core assembly machining method. The valve core assembly comprises a valve core base, a valve core body, and a driving shaft which are independent of one another and are sequentially connected; the valve core base is provided with a first flow channel; the valve core body is provided with a second flow channel; the first flow channel is communicated with a first end of the second flow channel; the end of the first flow channel away from the second flow channel is communicated with an inlet / outlet of a valve body assembly, and a second end of the second flow channel is communicated with communication ports of the valve body assembly; and the valve core assembly can rotate under the driving of the driving shaft to drive the end of the second flow channel to switch between multiple communication ports. The valve core assembly machining method can solve the problem of existing valve core assemblies being not easy to machining.

Description

Valve core assembly, multi-way valve, and processing method of valve core assembly

[0001] This application claims priority to the patent application filed with the State Intellectual Property Office of China on January 11, 2024, with application number 2024100457171, and with the invention name “Valve core assembly, multi-way valve and processing method of valve core assembly”, as well as priority to the patent application filed with the State Intellectual Property Office of China on March 15, 2024, with application number 2024205167306, and with the invention name “Multi-way valve”. Technical Field

[0002] The present application relates to the technical field of control valves, and in particular to a valve core assembly, a multi-way valve, and a method for processing the valve core assembly. Background Art

[0003] At present, a multi-way valve usually includes a valve core and a valve body assembly. The valve body assembly is provided with an inlet and outlet and multiple connecting ports. The valve core is rotatably arranged in the cavity of the valve body assembly. The valve core has a circulation channel. One end of the circulation channel is connected to the inlet and outlet, and the other end of the circulation channel can be selectively connected to one of the multiple connecting ports. The circulation channel is connected to different connecting ports through the rotation of the valve core, thereby realizing the switching of the cooling and heating modes of the multi-way valve.

[0004] In the prior art, the valve core is usually processed as a whole. Due to the complex structure of the valve core, its processing technology is complex and the valve core is not easy to process. At the same time, when processing the circulation channel, the tool needs to penetrate deep into the valve core, and the structure of the circulation channel is relatively complex, which can easily cause the tool to break. Summary of the Invention

[0005] The present application provides a valve core assembly, a multi-way valve, and a method for processing the valve core assembly to solve the problem in the prior art that valve cores are difficult to process.

[0006] According to one aspect of the present application, a valve core assembly is provided, which includes a valve core seat, a valve core body and a drive shaft that are independent of each other. The valve core seat, the valve core body and the drive shaft are connected in sequence. The valve core seat has a first flow channel, and the valve core body has a second flow channel. The first flow channel and the first end of the second flow channel are connected to each other. The end of the first flow channel away from the second flow channel is used to communicate with the inlet and outlet of the valve body assembly, and the second end of the second flow channel is used to communicate with the connecting port of the valve body assembly. The valve core assembly can be rotated by the drive shaft to drive the end of the second flow channel to switch between multiple connecting ports.

[0007] By applying the technical solution of the present application, by configuring the valve core assembly as a valve core seat, valve core body, and drive shaft that are independent and sequentially connected, it is possible to facilitate the separate processing of the valve core seat, valve core body, and drive shaft, thereby reducing the difficulty of processing the valve core assembly. When processing the first and second flow channels, the valve core seat and valve core body can be turned separately, reducing the difficulty of processing in a machining center. During turning, the tool does not need to extend too far into the first and second flow channels, making the tool less likely to break, while also ensuring the processing accuracy of the valve core assembly. In addition, the valve core seat and valve core body can also be formed by injection molding, and the first and second flow channels do not need to be turned after injection molding, thereby avoiding tool breakage during turning.

[0008] Furthermore, the second flow channel extends through both ends of the valve core body, and the inner wall of the second flow channel smoothly transitions from the second end of the second flow channel to the first end of the second flow channel. This arrangement allows the second flow channel to buffer and guide the refrigerant fluid, reducing the pressure drop of the valve core body to the refrigerant fluid and minimizing energy loss of the refrigerant fluid as it passes through the valve core assembly.

[0009] Furthermore, the flow area of ​​the first end is larger than the flow area of ​​the second end. Through the above arrangement, the first end can be prevented from throttling the refrigerant fluid, thereby ensuring the flow efficiency of the refrigerant fluid when passing through the valve core assembly.

[0010] Furthermore, the axis of the first flow channel coincides with the rotational axis of the valve core assembly, and the center of the second end of the second flow channel is not on the axis of the first flow channel. With this arrangement, the second end of the second flow channel can match the position of different communication ports during the rotation of the valve core assembly, thereby achieving the reversing function of the valve core assembly.

[0011] Furthermore, the first flow channel has a straight section and a tapered section that are interconnected. The tapered section is located on the side of the first flow channel that is adjacent to the second flow channel. The diameter of the tapered section gradually decreases from the second flow channel toward the first flow channel, and the size of the tapered section on the side adjacent to the second flow channel matches the size of the first end of the second flow channel. Through this arrangement, the tapered section can provide a transitional effect for the refrigerant fluid entering the first flow channel, reducing the pressure loss of the fluid as it passes through the first flow channel, further ensuring the circulation of the refrigerant fluid within the valve core assembly.

[0012] Furthermore, the cone angle of the conical section is α, wherein 20°≤α≤40°. Through the above arrangement, the conical section can further improve the circulation effect of the refrigerant fluid in the conical section while ensuring the effect of reducing the pressure loss of the refrigerant fluid.

[0013] Furthermore, the valve core body has a first mounting hole at one end away from the valve core seat, into which the drive shaft is inserted, and the valve core body has a second mounting hole at one end away from the drive shaft, into which the valve core seat is inserted, with the axis of the first mounting hole coinciding with the axis of the second mounting hole. This arrangement facilitates the processing and forming of the first and second mounting holes, allowing the first and second mounting holes to be processed by simply clamping the valve core body once, thereby improving processing efficiency.

[0014] Furthermore, the drive shaft is interference-fitted with the first mounting hole, and the drive shaft is welded to the valve core body. The valve core seat is interference-fitted with the second mounting hole, and the valve core seat is welded to the valve core body. Through the above arrangement, the drive shaft and valve core seat can be securely fixed to the valve core body, preventing refrigerant fluid from leaking from the first mounting hole or the second mounting hole, ensuring the airtightness of the valve core assembly, reducing the possibility of refrigerant fluid leakage, and thus ensuring the effectiveness of the valve core assembly.

[0015] Furthermore, the valve core body is made of metal and is formed by injection molding. Through the above arrangement, the impact resistance of the valve core assembly can be guaranteed, and the processing accuracy of the valve core body can also be guaranteed.

[0016] According to another aspect of the present application, a multi-way valve is provided, which includes: a drive assembly; a valve body assembly, the valve body assembly having a connecting cavity, an inlet and outlet, and a plurality of connecting ports, the plurality of connecting ports being arranged at annular intervals on the valve body assembly, and the plurality of connecting ports being connected to the connecting cavity, and the inlet and outlet being connected to the connecting cavity; a valve core assembly, the valve core assembly being the above-mentioned valve core assembly, the valve core assembly being rotatably arranged in the connecting cavity, the centers of the plurality of connecting ports being arranged in annular patterns are on the rotation axis of the valve core assembly, an end of the first flow channel away from the second flow channel is located on the rotation axis of the valve core assembly and is connected to the inlet and outlet, an end of the second flow channel away from the first flow channel can be selectively connected to the connecting port, and the drive assembly is drivingly connected to the drive shaft to drive the valve core assembly to rotate in the connecting cavity.

[0017] By applying the technical solution of the present application, the valve core assembly can rotate in the connecting cavity under the drive of the driving assembly, so that the end of the second flow channel rotates and switches between multiple connecting ports, and connects with multiple different connecting ports, thereby realizing the reversing function of the multi-way valve. In the present application, by setting the valve core assembly as a valve core seat, valve core body and drive shaft that are independent of each other and connected in sequence, it is possible to facilitate the separate processing of the valve core seat, valve core body and drive shaft, reducing the processing difficulty of the valve core assembly. During turning, the tool does not need to extend too much into the first flow channel and the second flow channel, and the tool is not easy to break. At the same time, the processing accuracy of the valve core assembly can also be guaranteed. In addition, the valve core seat and the valve core body can also be formed by injection molding. After the first flow channel and the second flow channel are injection molded, they do not need to be turned, thereby avoiding the tool breakage during turning.

[0018] Furthermore, the driving assembly has a driving end and a guide chamber, part of the guide chamber is arranged on the driving end, and the driving assembly also has a deceleration mechanism, which is connected to the guide chamber; the driving shaft of the valve core assembly is driven and connected to the driving assembly, and the driving shaft has a communicating hole set through it, one end of the communicating hole is connected to the guide chamber, and the other end of the communicating hole is connected to the second flow channel of the valve core assembly, and a filtering structure is provided at the communicating hole.

[0019] Furthermore, the filtering structure is arranged at an end of the communicating hole away from the diversion cavity.

[0020] Furthermore, the filtering structure includes a filter screen and a fixing member, and the fixing member is used to limit the filter screen in the communicating hole.

[0021] Furthermore, the connecting hole has a stepped installation section and a limiting section, the installation section and the limiting section are connected to each other, the inner diameter of the installation section is smaller than the inner diameter of the limiting section, the filter is arranged in the installation section, and the fixing part includes a gasket, which is arranged in the limiting section, and the inner diameter of the gasket is smaller than the diameter of the filter to limit the filter in the connecting hole.

[0022] Furthermore, the communicating hole also has a flow section, which is arranged on a side of the installation section away from the limiting section. The inner diameter of the flow section is smaller than the diameter of the filter screen to limit the displacement of the filter screen toward the flow section.

[0023] Furthermore, the fixing member and / or the filter screen are interference-pressed into the communicating hole.

[0024] Furthermore, the filter screen is a cylindrical structure, and has an open end and a closed end that are arranged opposite to each other, the end surface of the closed end is arc-shaped, and the open end is arranged toward the driving assembly.

[0025] According to another aspect of the present application, a method for processing a valve core assembly is provided. The valve core assembly is the above-mentioned valve core assembly, and the processing method includes: step one, processing the valve core seat, the valve core body and the drive shaft respectively; step two, fixing the valve core seat and the drive shaft respectively on the valve core body.

[0026] By applying the technical solution of the present application, during the processing of the valve core assembly, the valve core seat, the valve core body and the drive shaft are processed separately, and then the valve core seat and the drive shaft are fixed to the valve core body respectively. This can reduce the overall processing difficulty of the valve core assembly, simplify the process of integrated processing of the valve core assembly, improve processing efficiency, and ensure the processing effect of the valve core assembly.

[0027] Furthermore, processing the valve core body in step 1 specifically includes injection molding the valve core body using a metal material. This arrangement ensures the impact resistance of the valve core assembly and prevents the valve core body from significantly deforming under the impact of the refrigerant fluid. Using the injection molding process to process the valve core body also ensures the processing accuracy of the valve core body and improves the processing efficiency of the valve core body.

[0028] Furthermore, after the valve core body is processed by metal material injection molding, step one also includes: fixing the valve core body after injection molding on a fixture, and processing the first mounting hole and the second mounting hole at one time; step two specifically includes: inserting the drive shaft into the first mounting hole, inserting the valve core seat into the second mounting hole, and welding the drive shaft and the valve core seat to the valve core body respectively. Through the above arrangement, the coaxiality of the first mounting hole and the second mounting hole can be guaranteed, the valve core assembly can be prevented from shaking during rotation, and the stability of the valve core assembly rotation can be guaranteed. The drive shaft and the valve core seat can also be reliably fixed on the valve core body, preventing the refrigerant fluid from leaking from the first mounting hole or the second mounting hole, ensuring the airtightness of the valve core assembly, and reducing the possibility of refrigerant fluid leakage, thereby ensuring the use effect of the valve core assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings that constitute part of this application are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0030] FIG1 shows a cross-sectional view of a valve core assembly according to an embodiment of the present application;

[0031] FIG2 shows a schematic structural diagram of a valve core assembly according to an embodiment of the present application;

[0032] FIG3 shows a cross-sectional view of a valve core seat provided according to an embodiment of the present application;

[0033] FIG4 shows a cross-sectional view of a valve core body according to an embodiment of the present application;

[0034] FIG5 shows a cross-sectional view of a multi-way valve provided according to the first embodiment of the present application;

[0035] FIG6 shows a schematic structural diagram of a multi-way valve provided in a second embodiment of the present application;

[0036] FIG7 shows a schematic structural diagram of a valve core assembly provided in a second embodiment of the present application;

[0037] FIG8 shows a schematic structural diagram of a drive shaft according to a second embodiment of the present application.

[0038] Among them, the above-mentioned drawings include the following figure marks: 10, valve core seat; 11, first flow channel; 111, straight section; 112, tapered section; 20, valve core body; 21, second flow channel; 211, first end; 212, second end; 22, first mounting hole; 23, second mounting hole; 30, drive shaft; 31, connecting hole; 311, mounting section; 312, limiting section; 313, flow section; 40, valve body assembly; 41, connecting chamber; 42, inlet and outlet; 43, connecting port; 50, drive assembly; 51, guide chamber; 52, deceleration mechanism; 60, filter structure; 61, filter screen; 62, fixing part. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0040] As shown in Figures 1 and 2, an embodiment of the present application provides a valve core assembly, which includes a valve core seat 10, a valve core body 20 and a drive shaft 30 that are independent of each other. The valve core seat 10, the valve core body 20 and the drive shaft 30 are connected in sequence to form a valve core assembly. The valve core seat 10 has a first flow channel 11, and the valve core body 20 has a second flow channel 21. The first flow channel 11 and the first end 211 of the second flow channel 21 are connected to each other. The end of the first flow channel 11 away from the second flow channel 21 is used to communicate with the inlet and outlet 42 of the valve body assembly 40, and the second end 212 of the second flow channel 21 is used to communicate with the connecting port 43 of the valve body assembly 40. The valve core assembly can be rotated by the drive shaft 30 to drive the end of the second flow channel 21 to switch between multiple connecting ports 43.

[0041] By applying the technical solution of the present application, the first flow channel 11 of the valve core seat 10 and the second flow channel 21 of the valve core body 20 are interconnected to form a circulation channel, and the circulation channel can be used for the circulation of refrigerant fluid. The end of the first flow channel 11 away from the second flow channel 21 is used to communicate with the inlet and outlet 42 of the valve body assembly 40. The valve core assembly rotates through the drive shaft 30 to drive the end of the second flow channel 21 to rotate between multiple connecting ports 43, thereby realizing the reversing function of the circulation channel. In the present application, by setting the valve core assembly as the valve core seat 10, the valve core body 20 and the drive shaft 30 that are independent of each other and connected in sequence, it is possible to facilitate the separate processing of the valve core seat 10, the valve core body 20 and the drive shaft 30, thereby reducing the processing difficulty of the valve core assembly. During turning, the tool does not need to extend too far into the first flow channel 11 and the second flow channel 21, and the tool is not easy to break. At the same time, the processing accuracy of the valve core assembly can also be guaranteed. Furthermore, the valve core seat 10 and the valve core body 20 can also be formed by injection molding. The first flow channel 11 and the second flow channel 21 do not need to be turned after injection molding, thereby avoiding tool breakage during turning.

[0042] Furthermore, the second flow channel 21 runs through both ends of the valve core body 20, and the inner wall of the second flow channel 21 is formed by a smooth transition from the second end 212 of the second flow channel 21 to the first end 211 of the second flow channel 21. Specifically, in the present application, the smooth transition means that the second flow channel 21 does not have a turning angle greater than or equal to 90° along the flow direction. Specifically, the second flow channel 21 can be set as an inclined flow channel to facilitate the processing of the second flow channel 21. Through the above-mentioned arrangement, the pressure loss of the valve core body 20 to the refrigerant fluid can be reduced. When the refrigerant fluid flows from the second end 212 of the second flow channel 21 to the first end 211 of the second flow channel 21, the inner wall with a smooth transition can better guide the flow of the refrigerant fluid, play a buffering role on the refrigerant fluid, reduce the energy loss of the refrigerant fluid when passing through the valve core assembly, and improve the circulation efficiency of the refrigerant fluid.

[0043] In a specific embodiment of the present application, the refrigerant fluid flows in the valve core body 20 from the second end 212 to the first end 211. At this time, the flow area of ​​the first end 211 is larger than the flow area of ​​the second end 212. Through the above arrangement, it is possible to prevent the first end 211 from throttling the refrigerant fluid, thereby ensuring the flow efficiency of the refrigerant fluid when passing through the valve core assembly.

[0044] In another specific embodiment of the present application, the valve core body 20 is made of metal and is formed by injection molding. By using metal to make the valve core body 20, the impact resistance of the valve core assembly can be guaranteed, and the valve core body can be prevented from undergoing significant deformation under the impact of the refrigerant fluid. Using the injection molding process to process the valve core body 20 can also ensure the processing accuracy of the valve core body 20 and improve the processing efficiency of the valve core body 20. Furthermore, in the injection molding process, the second flow channel 21 can be processed by an oblique core pulling method. By setting the flow area of ​​the first end 211 to be larger than the flow area at the second end 212, it can also facilitate mold demolding, so that the mold can be normally withdrawn from the direction of the first end 211.

[0045] Specifically, the axis of the first flow channel 11 coincides with the rotational axis of the valve core assembly, while the center of the second end 212 of the second flow channel 21 is not on the axis of the first flow channel 11. This arrangement creates a certain angle between the second flow channel 21 and the rotational axis of the valve core assembly. As the valve core assembly rotates, the second end 212 of the second flow channel 21 can align with the position of different communication ports 43, achieving the reversing function of the valve core assembly.

[0046] Furthermore, the first flow channel 11 has a straight section 111 and a tapered section 112 that are interconnected. The tapered section 112 is located on the side of the first flow channel 11 close to the second flow channel 21. The diameter of the tapered section 112 gradually decreases from the second flow channel 21 to the first flow channel 11. The size of the tapered section 112 close to the second flow channel 21 is adapted to the size of the first end 211 of the second flow channel 21. Through the above-mentioned setting, the size of the first end 211 of the second flow channel 21 is adapted to the size of the tapered section 112 on the side close to the second flow channel 21, which can prevent the refrigerant fluid from passing through the second flow channel 21 into the first flow channel 11. The structure of the first flow channel 11 hinders the circulation of the refrigerant fluid, thereby ensuring the circulation efficiency of the refrigerant fluid. At the same time, because the diameter of the tapered section 112 gradually decreases from the second flow channel 21 to the first flow channel 11, the flow area at the first end 211 of the second flow channel 21 is larger than the flow area of ​​the straight section 111. Because the end of the first flow channel 11 away from the second flow channel 21 is used to communicate with the inlet and outlet 42 of the valve body assembly, this can prevent the first end 211 of the second flow channel 21 from throttling the refrigerant fluid that has not yet passed through the inlet and outlet 42 in advance, and by setting the tapered section 112, the pressure loss of the fluid when passing through the first flow channel 11 can also be reduced, further ensuring the circulation effect of the refrigerant fluid in the valve core assembly.

[0047] As shown in reference figure 3, the cone angle of the conical section 112 is α, wherein 20°≤α≤40°. When α is less than 20°, the cone angle of the conical section 112 is too small, and the effect of reducing the pressure loss of the refrigerant fluid in the first flow channel 11 is poor; when α is greater than 40°, the cone angle of the conical section 112 is too large, and the refrigerant fluid is prone to generate vortices in the conical section 112, reducing the circulation rate of the refrigerant fluid. By setting 20°≤α≤40°, it is possible to ensure the pressure loss reduction effect of the conical section 112 while improving the circulation effect of the refrigerant fluid in the conical section 112. Specifically, α can be 20°, 25°, 30°, 35° or 40°.

[0048] As shown in FIG4 , the end of the valve core body 20 away from the valve core seat 10 has a first mounting hole 22, and the drive shaft 30 is inserted into the first mounting hole 22. The end of the valve core body 20 away from the drive shaft 30 has a second mounting hole 23, and the valve core seat 10 is inserted into the second mounting hole 23. The axis of the first mounting hole 22 coincides with the axis of the second mounting hole 23. Through the above arrangement, the axis of the first mounting hole 22 coincides with the axis of the second mounting hole 23, which can facilitate the processing and forming of the first mounting hole 22 and the second mounting hole 23. The processing of the first mounting hole 22 and the second mounting hole 23 can be completed by clamping the valve core body 20 only once. At the same time, the coaxiality of the first mounting hole 22 and the second mounting hole 23 can be ensured, preventing the valve core assembly from shaking during rotation and ensuring the stability of the valve core assembly.

[0049] In the present application, the drive shaft 30 is interference-fitted with the first mounting hole 22, and the drive shaft 30 is welded to the valve core body 20. The valve core seat 10 is interference-fitted with the second mounting hole 23, and the valve core seat 10 is welded to the valve core body 20. Through the above arrangement, the drive shaft 30 and the valve core seat 10 can be reliably fixed to the valve core body 20, preventing the refrigerant fluid from leaking from the first mounting hole 22 or the second mounting hole 23, ensuring the airtightness of the valve core assembly, reducing the possibility of refrigerant fluid leakage, and thus ensuring the use effect of the valve core assembly.

[0050] Referring to FIG5 , a first embodiment of the present application provides a multi-way valve, comprising a drive assembly 50, a valve body assembly 40, and a valve core assembly. The valve body assembly 40 comprises a communication chamber 41, an inlet and outlet 42, and a plurality of communication ports 43. The plurality of communication ports 43 are annularly spaced on the valve body assembly 40, and the plurality of communication ports 43 are all in communication with the communication chamber 41, while the inlet and outlet 42 are in communication with the communication chamber 41. The valve core assembly is the aforementioned valve core assembly, rotatably disposed within the communication chamber 41. The plurality of communication ports 43 are annularly disposed with the center of the circle on the rotation axis of the valve core assembly. The end of the first flow channel 11 away from the second flow channel 21 is located on the rotation axis of the valve core assembly and is in communication with the inlet and outlet 42. The end of the second flow channel 21 away from the first flow channel 11 can selectively be in communication with the communication ports 43. The drive assembly 50 is drivably connected to the drive shaft 30 to drive the valve core assembly to rotate within the communication chamber 41.

[0051] By applying the technical solution of the present application, the valve core assembly can rotate in the connecting cavity 41 under the drive of the drive assembly 50, so that the end of the second flow channel 21 can rotate and switch between multiple connecting ports 43, and connect with multiple different connecting ports 43, thereby realizing the reversing function of the multi-way valve. In the present application, by setting the valve core assembly as a valve core seat 10, a valve core body 20 and a drive shaft 30 that are independent of each other and connected in sequence, it is possible to facilitate the separate processing of the valve core seat 10, the valve core body 20 and the drive shaft 30, thereby reducing the processing difficulty of the valve core assembly. During turning, the tool does not need to extend too much into the first flow channel 11 and the second flow channel 21, and the tool is not easy to break. At the same time, the processing accuracy of the valve core assembly can also be guaranteed. In addition, the valve core seat 10 and the valve core body 20 can also be formed by injection molding. After the first flow channel 11 and the second flow channel 21 are injection molded, they do not need to be turned, thereby avoiding the tool breakage during turning.

[0052] Referring to Figure 6, in the second embodiment provided by the present application, the drive assembly 50 has a drive end and a diversion chamber 51, a portion of the diversion chamber 51 being provided through the drive end. The drive assembly 50 also has a reduction mechanism 52, which is in communication with the diversion chamber 51. The drive shaft 30 of the valve core assembly is drivingly connected to the drive assembly 50. The drive shaft 30 has a connecting hole 31 extending therethrough. One end of the connecting hole 31 is in communication with the diversion chamber 51, and the other end of the connecting hole 31 is in communication with the second flow channel 21 of the valve core assembly. A filter structure 60 is provided at the connecting hole 31. Through the above-mentioned setting, low-temperature refrigerant can be introduced into the valve core assembly to form a low-temperature refrigerant flow path. The connecting hole 31 set on the drive shaft 30 guides the low-temperature refrigerant into the guide cavity 51, so as to cool the drive assembly 50 through the refrigerant with a lower temperature, thereby reducing the magnetic loss of the drive assembly 50. By setting a filtering structure 60 at the connecting hole 31, solid impurities in the refrigerant can be filtered out, preventing solid impurities from entering the guide cavity 51 and affecting the transmission of the speed reduction mechanism 52, thereby preventing the speed reduction mechanism 52 from being affected by the solid impurities and getting stuck, thereby ensuring the service life and stability of the multi-way valve.

[0053] Specifically in this application, the reduction mechanism 52 can be set in the form of a planetary gear set to increase the torque of the drive assembly 50 and output the increased torque to the valve core assembly, so as to achieve rapid rotation of the valve core assembly, thereby achieving rapid switching of the cooling and heating modes of the multi-way valve.

[0054] Furthermore, a filter structure 60 is provided at one end of the communicating hole 31 away from the diversion cavity 51. During long-term use of the multi-way valve, solid impurities in the refrigerant are filtered through the filter structure 60 and deposited on the filter structure 60. This arrangement can prevent a large amount of solid impurities from being deposited inside the communicating hole 31 and affecting the flow of the refrigerant in the communicating hole 31, thereby ensuring the diversion effect of the communicating hole 31.

[0055] Specifically, the filter structure 60 includes a filter screen 61 and a fixing member 62. The fixing member 62 is used to limit the position of the filter screen 61 within the communication hole 31. By providing the fixing member 62 to limit the displacement of the filter screen 61, the filter screen 61 is prevented from falling off when impacted by fluid or external shaking, thereby ensuring the stability of the filter screen 61 during use.

[0056] As shown in Figures 7 and 8, the communication hole 31 includes a stepped mounting section 311 and a retaining section 312. The mounting section 311 and the retaining section 312 are interconnected. The inner diameter of the mounting section 311 is smaller than that of the retaining section 312. The filter screen 61 is disposed within the mounting section 311. The fixing member 62 includes a gasket disposed within the retaining section 312. The gasket's inner diameter is smaller than that of the filter screen 61, thereby retaining the filter screen 61 within the communication hole 31. By configuring the mounting section 311 and the retaining section 312 as stepped sections, the gasket is positioned by the stepped surface formed between the mounting section 311 and the retaining section 312, ensuring that the gasket remains in place. The gasket acts as a retaining mechanism for the filter screen 61, preventing it from falling out of the mounting section 311 into the first flow channel 11 due to impact or gravity, thereby ensuring the stability of the valve core assembly during use.

[0057] Furthermore, the communication hole 31 further includes a flow section 313, which is located on the side of the mounting section 311 away from the limiting section 312. The inner diameter of the flow section 313 is smaller than the diameter of the filter 61 to limit the displacement of the filter 61 toward the flow section 313. This arrangement also forms a stepped structure between the flow section 313 and the mounting section 311, preventing the filter 61 from being impacted by the refrigerant and moving toward the flow guide cavity 51 as the refrigerant moves, further enhancing the stability of the filter 61 installed in the communication hole 31.

[0058] Optionally, in the present application, the fixing part is interference fit in the connecting hole 31. The interference fit installation method can facilitate the installation of the fixing part, and the interference fit installation method can ensure the stability of the fixing part installed in the connecting hole 31, preventing the fixing part from falling off. At the same time, after the filter structure 60 is clogged with dirt, the fixing part can be removed, and then the filter structure 60 can be removed to clean the filter, thereby improving the maintenance performance of the valve core assembly.

[0059] It is understandable that in the present application, the fixing member may also be riveted into the connecting hole 31 , or the fixing member may be welded to the drive shaft 30 , so as to further enhance the stability of the connection between the fixing member and the drive shaft 30 .

[0060] Optionally, in the present application, the filter screen 61 is press-fitted into the communicating hole 31. This arrangement ensures the stability of the filter screen 61 within the communicating hole 31, preventing the filter screen 61 from being unevenly impacted by the fluid and deflecting within the communicating hole 31, thereby creating a gap between the side wall of the filter screen 61 and the inner wall of the communicating hole 31, causing some fluid to pass directly into the guide cavity 51 without being filtered by the filter screen 61, thereby ensuring the performance of the filter structure 60.

[0061] Optionally, in the present application, the fixing member and the filter screen 61 are both interference-pressed into the communicating hole 31 , thereby further improving the stability of the filter screen 61 and the fixing member installed in the communicating hole 31 .

[0062] Furthermore, the filter screen 61 is a cylindrical structure having an open end and a closed end oppositely disposed. The closed end has an arc-shaped end surface, and the open end is disposed toward the drive assembly 50. The valve core assembly is relatively small, and the diameter of the communication hole 31 is also relatively small. Through this arrangement, the closed end of the cylindrical filter screen 61 can increase the filtration area of ​​the filter screen 61 compared to a traditional flat filter screen, thereby improving the filtration effect of the filter screen 61.

[0063] Another embodiment of the present application provides a method for processing a valve core assembly, which is the above-mentioned valve core assembly. The processing method includes: step one, processing the valve core seat 10, the valve core body 20 and the drive shaft 30 respectively; step two, fixing the valve core seat 10 and the drive shaft 30 on the valve core body 20 respectively.

[0064] By applying the technical solution of the present application, during the processing of the valve core assembly, the valve core seat 10, the valve core body 20 and the drive shaft 30 are processed separately, and then the valve core seat 10 and the drive shaft 30 are fixed on the valve core body 20 respectively. This can reduce the overall processing difficulty of the valve core assembly, reduce the possibility of tool collision accidents during the processing, simplify the process of integrated processing of the valve core assembly, improve processing efficiency, and ensure the processing effect of the valve core assembly.

[0065] Furthermore, processing the valve core body 20 in step 1 specifically includes injection molding the valve core body 20 using a metal material. Through the above arrangement, by using a metal material to manufacture the valve core body 20, the impact resistance of the valve core assembly can be ensured, and the valve core body can be prevented from generating significant deformation under the impact of the refrigerant fluid. Using the injection molding process to process the valve core body 20 can also ensure the processing accuracy of the valve core body 20, thereby improving the processing efficiency of the valve core body 20.

[0066] Specifically, after the valve core body 20 is injection molded using metal material, step one further includes: securing the injection-molded valve core body 20 to a fixture and simultaneously machining the first mounting hole 22 and the second mounting hole 23. Step two specifically includes: inserting the drive shaft 30 into the first mounting hole 22, inserting the valve core seat 10 into the second mounting hole 23, and welding the drive shaft 30 and valve core seat 10 to the valve core body 20, respectively. Through the above-mentioned arrangement, in step one, the first mounting hole 22 and the second mounting hole 23 are processed at one time, which can ensure the coaxiality of the first mounting hole 22 and the second mounting hole 23, prevent the valve core assembly from shaking during rotation, and ensure the stability of the rotation of the valve core assembly; in step two, the drive shaft 30 and the valve core seat 10 are respectively welded and fixed to the valve core body 20, which can reliably fix the drive shaft 30 and the valve core seat 10 on the valve core body 20, prevent the refrigerant fluid from leaking from the first mounting hole 22 or the second mounting hole 23, ensure the airtightness of the valve core assembly, reduce the possibility of refrigerant fluid leakage, and thus ensure the use effect of the valve core assembly.

[0067] 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, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0068] Unless otherwise specified, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application. Meanwhile, 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 actual proportional relationships. Technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods 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 can have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0069] In the description of this application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application 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. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0070] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. 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 figures. For example, if the device in the 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.

[0071] 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. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0072] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A spool assembly, characterized in that, The spool assembly includes a spool seat (10), a spool body (20), and a drive shaft (30) that are independent of each other. The spool seat (10), the spool body (20), and the drive shaft (30) are connected in sequence. The spool seat (10) has a first flow passage (11), the spool body (20) has a second flow passage (21), a first end (211) of the first flow passage (11) communicates with a first end (211) of the second flow passage (21). One end of the first flow passage (11) away from the second flow passage (21) is used to communicate with an inlet / outlet (42) of the valve body assembly (40), and a second end (212) of the second flow passage (21) is used to communicate with a communication port (43) of the valve body assembly (40). The spool assembly can rotate through the drive shaft (30) to drive the end of the second flow passage (21) to switch between multiple communication ports (43).

2. The spool assembly according to claim 1, characterized in that The second flow passage (21) penetrates through both ends of the spool body (20), and the inner wall of the second flow passage (21) is formed by smooth transition in the direction from the second end (212) of the second flow passage (21) to the first end (211) of the second flow passage (21).

3. The spool assembly according to claim 2, wherein, The flow area of the first end (211) is larger than the flow area at the second end (212).

4. The spool assembly according to claim 1, characterized in that, The axis of the first flow passage (11) coincides with the rotation axis of the spool assembly, and the center of the second end (212) of the second flow passage (21) is not on the axis of the first flow passage (11).

5. The spool assembly according to claim 1, wherein The first flow passage (11) has a straight section (111) and a tapered section (112) that communicate with each other. The tapered section (112) is located on the side of the first flow passage (11) close to the second flow passage (21). The diameter of the tapered section (112) gradually decreases in the direction from the second flow passage (21) to the first flow passage (11), and the size of the tapered section (112) on the side close to the second flow passage (21) is adapted to the size of the first end (211) of the second flow passage (21).

6. The spool assembly according to claim 5, characterized in that, The cone angle of the tapered section (112) is α, where 20° ≤ α ≤ 40°.

7. The spool assembly according to claim 1, characterized in that, One end of the spool body (20) away from the spool seat (10) has a first mounting hole (22), the drive shaft (30) is inserted into the first mounting hole (22), one end of the spool body (20) away from the drive shaft (30) has a second mounting hole (23), the spool seat (10) is inserted into the second mounting hole (23), and the axis of the first mounting hole (22) coincides with the axis of the second mounting hole (23).

8. The spool assembly according to claim 7, wherein, The drive shaft (30) is in interference fit with the first mounting hole (22), and the drive shaft (30) is welded to the spool body (20). The spool seat (10) is in interference fit with the second mounting hole (23), and the spool seat (10) is welded to the spool body (20).

9. The spool assembly according to claim 1, wherein The spool body (20) is made of a metal material and is formed by an injection molding process.

10. A multi-way valve, characterized in that, The multi-way valve includes: A drive assembly (50); Valve body assembly (40), the valve body assembly (40) having a communication cavity (41), an inlet / outlet (42), and a plurality of communication ports (43), the plurality of communication ports (43) being annularly spaced on the valve body assembly (40), and the plurality of communication ports (43) all communicating with the communication cavity (41), the inlet / outlet (42) communicating with the communication cavity (41); A spool assembly, the spool assembly being the spool assembly according to any one of claims 1 to 9, the spool assembly being rotatably disposed in the communication cavity (41), the centers of the annular arrangement of the plurality of communication ports (43) being on the axis of rotation of the spool assembly, one end of the first flow channel (11) away from the second flow channel (21) being on the axis of rotation of the spool assembly and communicating with the inlet / outlet (42), and one end of the second flow channel (21) away from the first flow channel (11) being selectively communicable with the communication port (43), the drive assembly (50) being drivingly connected to the drive shaft (30) to drive the spool assembly to rotate in the communication cavity (41).

11. The multi-way valve according to claim 10, characterized in that The drive assembly (50) has a drive end and a diversion cavity (51), a part of the diversion cavity (51) being disposed through the drive end, the drive assembly (50) further having a reduction mechanism (52), the reduction mechanism (52) communicating with the diversion cavity (51); The drive shaft (30) of the spool assembly is drivingly connected to the drive assembly (50), the drive shaft (30) having a through communication hole (31), one end of the communication hole (31) communicating with the diversion cavity (51), the other end of the communication hole (31) communicating with the second flow channel (21) of the spool assembly, and a filtering structure (60) being provided at the communication hole (31).

12. The multi-way valve according to claim 11, characterized in that, The filtering structure (60) is provided at one end of the communication hole (31) away from the diversion cavity (51).

13. The multi-way valve according to claim 11, characterized in that, The filtering structure (60) includes a filter screen (61) and a fixing member (62), the fixing member (62) being used for limiting the filter screen (61) in the communication hole (31).

14. The multi-way valve according to claim 13, characterized in that, The communication hole (31) has a stepped installation section (311) and a limiting section (312), the installation section (311) and the limiting section (312) being in communication with each other, the inner diameter of the installation section (311) being smaller than the inner diameter of the limiting section (312), the filter screen (61) being disposed in the installation section (311), the fixing member (62) including a washer, the washer being disposed in the limiting section (312), the inner diameter of the washer being smaller than the diameter of the filter screen (61) to limit the filter screen (61) in the communication hole (31).

15. The multi-way valve according to claim 14, characterized in that, The communication hole (31) further has a flow-through section (313), the flow-through section (313) being disposed on a side of the installation section (311) away from the limiting section (312), the inner diameter of the flow-through section (313) being smaller than the diameter of the filter screen (61) to limit the displacement of the filter screen (61) towards the flow-through section (313).

16. The multi-way valve according to claim 13, wherein, The fixing member (62), and / or, the filter screen (61) is press-fitted into the communication hole (31) with an interference fit.

17. The multi-way valve according to claim 13, characterized in that, The filter screen (61) is of a cylindrical structure. The filter screen (61) has an open end and a closed end which are oppositely arranged. The end face of the closed end is arc-shaped, and the open end faces the driving assembly (50).

18. A processing method for a valve core assembly, characterized in that, The spool assembly is the spool assembly according to any one of claims 1 to 9, and the processing method includes: Step 1, respectively process the spool seat (10), the spool body (20) and the driving shaft (30); Step 2, respectively fix the spool seat (10) and the driving shaft (30) on the spool body (20).

19. The processing method according to claim 18, characterized in that, In the processing of the spool body (20) in Step 1, specifically, the spool body (20) is processed by injection molding with a metal material.

20. The processing method according to claim 19, wherein After the spool body (20) is processed by injection molding with a metal material, Step 1 further includes: fixing the injection-molded spool body (20) on a fixture, and processing the first mounting hole (22) and the second mounting hole (23) at one time; Step 2 specifically includes: inserting the driving shaft (30) into the first mounting hole (22), inserting the spool seat (10) into the second mounting hole (23), and welding and fixing the driving shaft (30) and the spool seat (10) to the spool body (20) respectively.

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