Electric valve

Abstract

Provided in the present application is an electric valve. The electric valve comprises: a driving device, wherein the driving device comprises a driving assembly and a speed reduction assembly, the driving assembly being in driving connection with the speed reduction assembly, the speed reduction assembly having a housing, the housing forming an accommodating cavity, and a speed reduction gear set being provided in the accommodating cavity; a valve body assembly, which has a mounting cavity and a communication cavity, with the driving device being disposed in the mounting cavity; and a valve core assembly, which has a circulation channel, wherein the circulation channel is configured for the circulation of a refrigerant. The valve core assembly has a driving shaft; the driving shaft is in driving connection with the speed reduction assembly; the driving shaft has a circulation hole running therethrough, with one end of the circulation hole being in communication with the mounting cavity, and the other end of the circulation hole being in communication with the circulation channel; and an impurity flow channel is provided between the speed reduction assembly and the valve body assembly, the impurity flow channel respectively communicates with the accommodating cavity and the circulation hole, and impurities in the accommodating cavity can enter the circulation channel through the impurity flow channel. The technical solution of the present application can solve the problem in the prior art that waste chips are prone to being accumulated in a speed reduction assembly.

Description

Electric valve

[0001] This application claims priority to the patent application filed with the State Intellectual Property Office of China on March 15, 2024, with application number 202410303085.4 and invention name “Electric Valve”, as well as priority to the patent application filed with the State Intellectual Property Office of China on March 15, 2024, with application number 202420516676.5 and invention name “Multi-way Valve”. Technical Field

[0002] The present application relates to the technical field of control valves, and in particular to an electric valve. Background Art

[0003] At present, electric valves are often used to switch the cooling and heating modes in air-conditioning systems. Electric valves usually include a driving device, a valve body and a valve core. The driving device drives the valve core to rotate in the valve body to achieve the switching of the flow channel. The driving device includes a driving component and a reduction component. The reduction component is used to amplify the torque of the driving component to achieve the switching of the cooling and heating modes.

[0004] However, the reduction assembly in the prior art is usually composed of a gear structure, which is prone to wear during rotation. The waste generated by the wear is easily accumulated inside the gear structure, affecting the service life of the gear structure. The generation of waste will also increase the wear of the gear structure, further reducing the service life of the gear structure. The waste will also affect the reliability of the gear structure's meshing action and even cause the gear structure to get stuck. Summary of the Invention

[0005] The present application provides an electric valve to solve the problem of waste chips easily accumulating inside the deceleration component in the prior art.

[0006] The present application provides an electric valve, which includes: a driving device, including a driving component and a reduction component, the driving component is driven and connected to the reduction component, the reduction component has a shell, the shell forms a accommodating chamber, and a reduction wheel group is arranged in the accommodating chamber; a valve body component has an installation chamber and a connecting chamber, and the driving device is arranged in the installation chamber; a valve core component is arranged in the connecting chamber, the valve core component has a circulation channel, the circulation channel is used for circulating refrigerant, the valve core component has a driving shaft, the driving shaft is driven and connected to the reduction component, the driving shaft has a circulation hole set through it, one end of the circulation hole is connected to the installation chamber, and the other end of the circulation hole is connected to the circulation channel; wherein, an impurity flow channel is provided between the reduction component and the valve body assembly, the impurity flow channel is respectively connected to the accommodating chamber and the circulation hole, and impurities in the accommodating chamber can enter the circulation channel through the impurity flow channel.

[0007] By applying the technical solution of the present application, a reduction assembly is provided between the drive assembly and the valve core assembly, which can amplify the torque of the drive assembly, overcome the friction of the valve core assembly during rotation, and improve the switching efficiency of the electric valve. By providing an impurity flow channel between the reduction assembly and the valve body assembly, a discharge path can be provided for impurities formed during the rotation of the reduction wheel group in the accommodating cavity, so that the impurities can flow to the circulation channel through the impurity flow channel, and the impurities are discharged from the electric valve along with the refrigerant fluid, thereby preventing impurities from accumulating in the accommodating cavity and affecting the transmission and engagement of the reduction wheel group, thereby improving the service life of the reduction wheel group and ensuring the use effect of the electric valve.

[0008] Furthermore, the housing is provided with a balancing channel, the drive assembly having a rotating chamber, and a drive component disposed within the rotating chamber. One end of the balancing channel communicates with the accommodating chamber, and the other end of the balancing channel communicates with the rotating chamber, thereby balancing the pressure within the circulation channel and the impurity flow channel. This arrangement balances the pressure within the rotating chamber, the accommodating chamber, and the circulation channel, allowing impurities to flow naturally into the circulation channel under the action of gravity, ensuring the effective circulation of impurities within the impurity flow channel.

[0009] Furthermore, the reduction assembly further comprises an output shaft, which is disposed on the reduction wheel assembly and is drivingly connected to the drive shaft. The output shaft has a first communication hole, one end of which is connected to the circulation hole, and the other end of which is connected to the accommodating cavity. Through the above arrangement, a driving connection between the reduction assembly and the drive shaft can be achieved.

[0010] Furthermore, the reduction wheel assembly includes an output wheel, which includes a base plate and an internal gear. The internal gear and the output shaft are disposed on opposite sides of the base plate. The internal gear is rotatably disposed within the accommodating chamber. The output shaft is drivingly connected to the output wheel. A second connecting hole is disposed on a side wall of the output shaft, and a third connecting hole is disposed on the base plate. The first connecting hole, the second connecting hole, and the third connecting hole are sequentially connected to form an impurity flow channel. Through this arrangement, waste chips within the accommodating chamber can enter the second connecting hole through the third connecting hole, and then enter the circulation hole through the first connecting hole, and be discharged with the refrigerant fluid.

[0011] Furthermore, the reduction gear set also includes a sun gear, planetary gears, a fixed gear, a first connecting plate, and a second connecting plate. The sun gear is connected to the driving assembly, and there are multiple planetary gears, each of which is meshed with the sun gear. The fixed gear is fixedly arranged and sleeved on the outside of the multiple planetary gears. The external teeth of the multiple planetary gears are meshed with the internal teeth of the fixed gear. One end of the multiple planetary gears close to the driving assembly is rotatably connected to the first connecting plate, and the other end of the multiple planetary gears is rotatably connected to the second connecting plate. The internal gear is sleeved on the outside of the multiple planetary gears, and the external teeth of the multiple planetary gears are meshed with the internal gear. Through the above arrangement, the waste chips generated by the multiple planetary gears during the rotation of the reduction gear set can fall into the third connecting hole, thereby realizing the discharge of the waste chips and improving the service life of the reduction gear set.

[0012] Furthermore, there is a gap between the bottom plate and the bottom of the installation cavity, and the second communication hole and the third communication hole are connected through the gap. Through the above arrangement, the second communication hole and the third communication hole can be connected, and the friction between the bottom plate and the installation cavity can be reduced.

[0013] Furthermore, a plurality of second communicating holes are provided, the plurality of second communicating holes being annularly spaced apart on the side wall of the output shaft; and / or a plurality of third communicating holes are provided, the plurality of third communicating holes being annularly spaced apart on the bottom plate. These arrangements increase the flow area of ​​the impurity flow channel, allowing impurities to be better discharged from the receiving chamber, further preventing the accumulation of waste chips within the receiving chamber.

[0014] Furthermore, the bottom plate has a socket, the output shaft is inserted into the socket, and a rotation-stopping structure is provided between the socket and the side wall of the output shaft, the rotation-stopping structure is used to limit the output shaft from rotating relative to the reduction gear set. Through the above arrangement, the synchronous rotation of the output shaft and the bottom plate can be ensured.

[0015] Furthermore, the inner wall of the socket has a section, the output shaft has a connecting section, and the shape of the inner wall of the socket matches the outer shape of the connecting section to form a rotation-stop structure. Through the above arrangement, the section and the connecting section cooperate to ensure the stability of the electric valve operation.

[0016] Furthermore, the reduction wheel assembly has a limiting boss on the side facing the output shaft, and the limiting boss is arranged around the outer periphery of the socket. Through the above arrangement, the limiting boss can increase the matching area between the connecting section and the socket, and enhance the limiting effect of the anti-rotation structure.

[0017] Furthermore, the limiting boss has a flow groove, which is connected to the second communication hole and the interval respectively. Through the above arrangement, the limiting boss can be prevented from blocking the impurity flow channel, ensuring that the impurities can flow normally.

[0018] Furthermore, a plug-in slot is provided on the output shaft, and the drive shaft and the plug-in slot are matched in a circumferential upper limit position to limit the rotation of the drive shaft relative to the output shaft.

[0019] Furthermore, a limiting structure is provided between the deceleration assembly and the mounting cavity, and the limiting structure is used to limit the rotation range of the deceleration assembly. Through the above arrangement, the rotation range of the valve core assembly connected to the deceleration assembly can be limited to prevent the valve core assembly from excessive rotation.

[0020] Furthermore, a limiting post is provided on one side of the deceleration assembly toward the bottom of the installation cavity, and a limiting groove is provided at the bottom of the installation cavity, in which the limiting post is provided. Through the above arrangement, both ends of the limiting groove can limit the movement of the limiting post.

[0021] Furthermore, the reduction wheel group includes an output wheel, the reduction assembly is driven and connected to the valve core assembly through the output wheel, the limit column is arranged on the output wheel, and the limit column and the output wheel are integrally formed by powder metallurgy or injection molding.

[0022] Furthermore, an isolation boss is provided around the periphery of the limiting groove, and the isolation boss extends toward the direction of the deceleration assembly. Through the above arrangement, the isolation boss can prevent impurities in the gap between the deceleration assembly and the bottom of the installation cavity from entering the limiting groove.

[0023] Furthermore, the valve body assembly has a mounting hole, with a connecting cavity and a mounting cavity disposed at either end of the mounting hole. The valve core assembly is inserted into the mounting hole and connected to the output shaft. A bearing is disposed between the outer wall of the output shaft and the inner wall of the mounting hole. This arrangement reduces friction loss between the output shaft, lowers energy loss in the drive assembly, and improves the transmission efficiency of the electric valve.

[0024] Furthermore, a washer is disposed within the mounting hole, positioned on the side of the bearing away from the limiting boss. The washer cooperates with the outer ring of the bearing to provide a lower limit for the bearing, while the limiting boss cooperates with the inner ring of the bearing to provide an upper limit for the bearing. This arrangement provides axial positioning for the bearing and also creates a gap between the bottom plate and the bottom of the mounting cavity, thereby ensuring that waste chips can flow out of the impurity flow channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] 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:

[0026] FIG1 shows a cross-sectional view of the electric valve provided by the present application;

[0027] FIG2 shows a partial enlarged view of point A in FIG1 ;

[0028] FIG3 shows a schematic structural diagram of a housing provided in this application;

[0029] FIG4 shows a cross-sectional view of the housing provided by the present application;

[0030] FIG5 shows a schematic structural diagram of the output wheel provided by the present application;

[0031] FIG6 shows a cross-sectional view of the output wheel provided by the present application;

[0032] FIG7 shows a schematic structural diagram of the output shaft provided by the present application;

[0033] FIG8 shows a cross-sectional view of the output shaft provided by the present application;

[0034] FIG9 shows a schematic structural diagram of the assembly of the output shaft and the output wheel provided by the present application;

[0035] FIG10 shows a schematic structural diagram of the valve seat provided in this application;

[0036] FIG11 shows a cross-sectional view of the valve seat provided in the present application.

[0037] The above drawings include the following reference numerals: 100, impurity flow channel; 101, first communicating hole; 102, second communicating hole; 103, third communicating hole; 200, balancing channel; 10, driving device; 11, driving assembly; 111, rotating chamber; 112, driving component; 12, reduction assembly; 121, housing; 122, reduction gear set; 1221, sun gear; 1222, planetary gear; 1223, fixed gear; 1224, output gear; 12241, bottom plate; 12242, internal gear; 12243, socket; 12244, cross section; 1225, first connecting plate; 1226, second connecting plate; 123, output shaft; 1231, connecting section; 1232, plug-in slot; 124, limiting boss; 1241, circulation slot; 125, limiting column; 20. Valve body assembly; 201. Valve seat; 202. Valve cover; 21. Mounting cavity; 211. Limiting groove; 212. Isolation boss; 22. Connecting cavity; 23. Inlet and outlet; 24. Connecting port; 25. Mounting hole; 251. First hole section; 252. Second hole section; 26. Bearing; 27. Gasket; 30. Valve core assembly; 31. Circulation channel; 32. Drive shaft; 321. Circulation hole. DETAILED DESCRIPTION

[0038] 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.

[0039] As shown in Figures 1 and 2, an embodiment of the present application provides an electric valve, which includes a drive device 10, a valve body assembly 20, and a valve core assembly 30. The drive device 10 includes a drive assembly 11 and a reduction assembly 12, and the drive assembly 11 is driven and connected to the reduction assembly 12. The reduction assembly 12 has a housing 121, and the housing 121 forms a receiving cavity, and a reduction wheel assembly 122 is provided in the receiving cavity. The valve body assembly 20 has an installation cavity 21 and a connecting cavity 22, and the drive device 10 is arranged in the installation cavity 21. The valve core assembly 30 is arranged in the connecting cavity 22, and the valve core assembly 30 has a circulation channel 31, and the circulation channel 31 is used to circulate refrigerant. The valve core assembly 30 has a drive shaft 32, and the drive shaft 32 is driven and connected to the reduction assembly 12. The drive shaft 32 has a circulation hole 321 provided therethrough, and one end of the circulation hole 321 is connected to the installation cavity 21, and the other end of the circulation hole 321 is connected to the circulation channel 31. There is an impurity flow channel 100 between the deceleration assembly 12 and the valve body assembly 20 . The impurity flow channel 100 is communicated with the accommodating cavity and the circulation hole 321 respectively. Impurities in the accommodating cavity can enter the circulation channel 31 through the impurity flow channel 100 .

[0040] By applying the technical solution of the present application, a reduction assembly 12 is provided between the drive assembly 11 and the valve core assembly 30, which can amplify the torque of the drive assembly 11, overcome the friction of the valve core assembly 30 during rotation, and improve the switching efficiency of the electric valve. By providing an impurity flow channel 100 between the reduction assembly 12 and the valve body assembly 20, a discharge path can be provided for impurities formed during the rotation of the reduction wheel group 122 in the accommodating cavity, so that the impurities can flow to the circulation channel 31 through the impurity flow channel 100, and the impurities are discharged from the electric valve along with the refrigerant fluid, thereby preventing impurities from accumulating in the accommodating cavity and affecting the transmission and engagement of the reduction wheel group 122, thereby improving the service life of the reduction wheel group 122 and ensuring the use effect of the electric valve.

[0041] It is worth noting that the electric valve structure provided in this application can be used in a valve structure with a reducer, such as an electric electric valve, an electric ball valve, etc.

[0042] Specifically in the present application, the valve body assembly 20 also has an inlet and outlet 23 and a connecting port 24. There are multiple connecting ports 24, and the multiple connecting ports 24 are arranged in an annular manner on the valve body assembly. The multiple connecting ports 24 are all connected to the connecting cavity 22. The inlet and outlet 23 are connected to the connecting cavity 22. One end of the circulation channel 31 is located on the rotation axis of the valve core assembly 30 and is connected to the inlet and outlet 23. The other end of the circulation channel 31 can be selectively connected to the connecting port 24. When the driving assembly 11 drives the valve core assembly 30 to rotate in the connecting cavity 22, the circulation channel 31 can be selectively connected to one of the multiple connecting ports 24. Low-temperature refrigerant can be introduced into the circulation channel 31 to form a low-temperature flow path, and high-temperature refrigerant can be introduced into the connecting cavity 22 to form a high-temperature refrigerant flow path. When the circulation channel 31 rotates and switches between the multiple connecting ports 24, the switching of the cooling and heating modes can be realized.

[0043] 3 and 4 , a balancing channel 200 is provided on the housing 121, the drive assembly 11 has a rotating chamber 111, a drive component 112 is provided in the rotating chamber 111, one end of the balancing channel 200 is connected to the accommodating chamber, and the other end of the balancing channel 200 is connected to the rotating chamber 111 to balance the pressure in the circulation channel 31 and the impurity flow channel 100. Through the above arrangement, after entering the circulation hole 321, the refrigerant fluid can enter the rotating chamber 111 through the balancing channel 200, cool the drive component 112, reduce the magnetic loss of the drive component 112, and further improve the service life of the drive device 10. At the same time, it can also balance the pressure in the rotating chamber 111, the accommodating chamber and the circulation channel 31, so that impurities can naturally flow to the circulation channel 31 under the action of gravity, ensuring the circulation effect of impurities in the impurity flow channel 100.

[0044] 1 to 8 , the reduction assembly 12 further includes an output shaft 123, which is disposed on the reduction wheel assembly 122 and is drivingly connected to the drive shaft 32. The output shaft 123 has a first connecting hole 101, one end of which is connected to the circulation hole 321, and the other end of the first connecting hole 101 is connected to the accommodating chamber. This arrangement enables a driving connection between the reduction assembly 12 and the drive shaft 32, and allows impurities in the accommodating chamber to flow into the circulation hole 321 through the first connecting hole 101.

[0045] In a specific embodiment of the present application, the drive shaft 32 and the output shaft 123 are plug-fitted, and a stop structure or a fixed structure can be set between the drive shaft 32 and the output shaft 123 to ensure the stability of the connection between the drive shaft 32 and the output shaft 123, to ensure that the drive shaft 32 and the output shaft 123 can rotate synchronously, and to improve the response speed of the electric valve when switching between cooling and heating modes.

[0046] Specifically, in the present application, the reduction wheel assembly 122 includes an output wheel 1224, which includes a base plate 12241 and an internal gear 12242. The internal gear 12242 and the output shaft 123 are arranged on opposite sides of the base plate 12241. The internal gear 12242 is rotatably arranged in the accommodating chamber. The output shaft 123 is drivingly connected to the output wheel 1224. A second connecting hole 102 is provided on the side wall of the output shaft 123, and a third connecting hole 103 is provided on the base plate 12241. The first connecting hole 101, the second connecting hole 102, and the third connecting hole 103 are sequentially connected to form an impurity flow channel 100. Through the above arrangement, waste chips generated during the rotation of the reduction wheel assembly 122 can enter the second connecting hole 102 through the third connecting hole 103, and then enter the circulation hole 321 through the first connecting hole 101, so as to discharge the waste chips and prevent the waste chips from accumulating in the accommodating chamber.

[0047] Furthermore, the reduction gear set 122 also includes a sun gear 1221, planetary gears 1222, a fixed gear 1223, a first connecting plate 1225 and a second connecting plate 1226. The sun gear 1221 is driven and connected to the drive assembly 11. A plurality of planetary gears 1222 are provided, and the plurality of planetary gears 1222 are respectively engaged with the sun gear 1221. The fixed gear 1223 is fixedly provided and sleeved on the outer sides of the plurality of planetary gears 1222. The outer teeth of the plurality of planetary gears 1222 are engaged with the inner teeth of the fixed gear 1223. One end of the plurality of planetary gears 1222 close to the drive assembly 11 is rotatably connected to the first connecting plate 1225, and the other end of the plurality of planetary gears 1222 is rotatably connected to the second connecting plate 1226. The internal gear 12242 is sleeved on the outer sides of the plurality of planetary gears 1222, and the outer teeth of the plurality of planetary gears 1222 are engaged with the internal gear 12242. Through the above-mentioned arrangement, the sun gear 1221, the planetary gear 1222, the fixed gear 1223, the output gear 1224, the first connecting plate 1225 and the second connecting plate 1226 can cooperate with each other to amplify the torque from the drive assembly 11, and output the torque to the drive shaft 32 through the output gear 1224. When the multiple planetary gears 1222 cooperate with the sun gear 1221, the fixed gear 1223 and the internal gear 12242, the waste chips generated can fall into the third connecting hole 103 through the gaps between the multiple planetary gears 1222, thereby improving the service life of the reduction gear set 122.

[0048] Furthermore, a gap is defined between the bottom plate 12241 and the bottom of the mounting cavity 21, and the second connecting hole 102 and the third connecting hole 103 are connected via the gap. This arrangement allows waste debris to fall into the gap between the bottom plate 12241 and the bottom of the mounting cavity 21 and then enter the second connecting hole 102 as the bottom plate 12241 rotates, thereby connecting the impurity flow channel 100. This also reduces friction between the bottom plate 12241 and the accommodating cavity, minimizing the impact of waste debris on the rotation of the reduction gear assembly 122.

[0049] In some feasible embodiments of the present application, a diversion structure is provided between the bottom of the installation cavity 21 and the second connecting hole 102 , so that waste chips can better enter the second connecting hole 102 , preventing waste chips from being deposited at the bottom of the installation cavity 21 , thereby ensuring the use effect of the reduction wheel group 122 .

[0050] Specifically, the guide structure can be a guide groove, which is arranged at the bottom of the installation cavity 21, one end of the guide groove is connected to the second connecting hole 102, and the other end of the guide groove can be arranged at the bottom of the installation cavity 21 and corresponding to the third connecting hole 103.

[0051] Specifically, the diversion structure can also be set as a diversion slope, or a diversion hole, etc., as long as the diversion effect on impurities can be achieved.

[0052] In one embodiment of the present application, a plurality of second connecting holes 102 are provided, and the plurality of second connecting holes 102 are arranged on the side wall of the output shaft 123 at annular intervals, so as to increase the flow area of ​​the impurity flow channel 100 and improve the effect of the impurity flow channel 100 in discharging waste chips.

[0053] In another embodiment of the present application, a plurality of third connecting holes 103 are provided, and the plurality of third connecting holes 103 are arranged in a ring-shaped interval on the bottom plate 12241. This can enhance the effect of the third connecting holes 103 in collecting waste generated by the reduction wheel group 122, and further prevent the accumulation of waste in the accommodating cavity.

[0054] In another embodiment of the present application, a plurality of second communication holes 102 and a plurality of third communication holes 103 are provided. The plurality of second communication holes 102 are provided at annular intervals on the side wall of the output shaft 123, and the plurality of third communication holes 103 are provided at annular intervals on the bottom plate 12241. This arrangement increases the flow area of ​​the impurity flow channel 100, allowing impurities to be better discharged from the accommodating cavity. It also reduces the probability of impurity flow channel 100 becoming clogged, thereby ensuring the flow efficiency of the impurity flow channel 100.

[0055] 5 to 9 , the bottom plate 12241 has a socket 12243, into which the output shaft 123 is inserted. A stop structure is provided between the socket 12243 and the sidewall of the output shaft 123, which is used to limit the rotation of the output shaft 123 relative to the reduction gear assembly 122. This arrangement ensures that relative rotation between the output shaft 123 and the bottom plate 12241 does not occur during the rotation of the output wheel 1224, thereby improving the stability of the connection between the output shaft 123 and the bottom plate 12241, achieving a reliable connection between the reduction gear assembly 122 and the drive shaft 32, ensuring that the drive shaft 32 and the reduction gear assembly 122 can rotate synchronously, and improving the response speed of the electric valve when switching between cooling and heating modes.

[0056] Furthermore, the inner wall of socket 12243 has a cut surface 12244, and output shaft 123 has a connecting section 1231. The inner wall of socket 12243 and the outer periphery of connecting section 1231 are shaped to form a rotation-stop structure. This arrangement ensures that output shaft 123 and base plate 12241 rotate synchronously, ensuring the stability of the electric valve operation.

[0057] In one embodiment of the present application, the reduction gear assembly 122 has a limiting boss 124 on the side facing the output shaft 123. The limiting boss 124 is disposed around the outer circumference of the insertion hole 12243. This configuration increases the mating area between the connecting section 1231 and the insertion hole 12243, further improving the mating effect between the cut surface 12244 and the insertion hole 12243, and further enhancing the limiting effect of the anti-rotation structure.

[0058] Specifically, the limiting boss 124 has a flow groove 1241, which is connected to the second communication hole 102 and the gap. Through the above arrangement, the flow groove 1241 can achieve communication between the second communication hole 102 and the gap between the bottom plate 12241 and the bottom of the installation cavity 21, preventing the limiting boss 124 from blocking the impurity flow channel 100, ensuring that impurities can flow normally.

[0059] Specifically, as shown in FIG8 , the output shaft 123 is provided with a plug-in slot 1232, and the drive shaft 32 cooperates with the plug-in slot 1232 at a circumferential upper limit position to limit the rotation of the drive shaft 32 relative to the output shaft 123. This arrangement ensures synchronous rotation between the valve core assembly 30 and the output shaft 123, ensures a stable connection between the valve core assembly 30 and the reduction assembly 12, improves the response accuracy of the valve core assembly 30 to the reduction assembly 12, further prevents excessive rotation of the valve core assembly 30, and ensures the effective cooperation between the valve core assembly 30 and the valve body assembly 20.

[0060] In the present application, the valve body assembly 20 includes a valve seat 201 and a valve cover 202 , and the valve seat 201 and the valve cover 202 together form a communicating cavity 22 to facilitate installation and removal of the valve core assembly 30 .

[0061] 9 and 10 , a limiting structure is provided between the reduction assembly 12 and the mounting cavity 21. The limiting structure is used to limit the rotation range of the reduction assembly 12. Through the above arrangement, the limiting structure can limit the rotation range of the reduction assembly 12, thereby limiting the rotation range of the valve core assembly 30 connected to the reduction assembly 12, preventing the valve core assembly 30 from rotating excessively and causing a gap between the flow channel 31 and the communication port 24, thereby reducing the probability of internal leakage of the electric valve and ensuring the effectiveness of the electric valve.

[0062] Specifically, a limiting post 125 is provided on one side of the reduction assembly 12 facing the bottom of the mounting cavity 21. The bottom of the mounting cavity 21 has a limiting groove 211. The limiting post 125 is disposed within the limiting groove 211. The cross-sectional shape of the limiting groove 211 is adapted to the rotational range of the limiting post 125. With this arrangement, the limiting post 125 moves within the limiting groove 211, and the two ends of the limiting groove 211 can limit the movement of the limiting post 125, thereby preventing excessive rotation of the reduction assembly 12.

[0063] In a specific embodiment of the present application, two limiting posts 125 and two limiting slots 211 are provided, and the limiting posts 125 and the limiting slots 211 are provided in a one-to-one correspondence. The two limiting posts 125 are symmetrically arranged along the axis of the reduction assembly 12. Through the above arrangement, the two limiting posts 125 can balance the rotational torque of the reduction assembly 12, prevent the reduction assembly 12 from generating a deflection force during the rotation process, ensure the stable rotation of the reduction assembly 12, reduce the wear of the reduction assembly 12 during the rotation process, and increase the service life of the reduction assembly 12.

[0064] Furthermore, the reduction wheel assembly 122 includes an output wheel 1224, through which the reduction assembly 12 is drivenly connected to the valve core assembly 30. A limiting post 125 is provided on the output wheel 1224. The limiting post 125 and the output wheel 1224 are integrally formed by powder metallurgy or injection molding. This arrangement improves the integrity and structural performance of the output wheel 1224 and reduces the risk of the limiting post 125 falling off after long-term use.

[0065] In another specific embodiment of the present application, an isolation boss 212 is provided in an annular shape around the periphery of the limiting groove 211, and the isolation boss 212 extends toward the direction of the reduction assembly 12. Through such a configuration, the isolation boss 212 can prevent impurities in the gap between the reduction assembly 12 and the bottom of the mounting cavity 21 from entering the limiting groove 211, thereby preventing inaccurate positioning of the limiting post 125 and ensuring the effective fit between the limiting post 125 and the limiting groove 211.

[0066] In the present application, the valve body assembly 20 has a mounting hole 25, with the communicating cavity 22 and the mounting cavity 21 respectively disposed at opposite ends of the mounting hole 25. The valve core assembly 30 is disposed within the mounting hole 25 and connected to the output shaft 123. A bearing 26 is disposed between the outer wall of the output shaft 123 and the inner wall of the mounting hole 25. The provision of the bearing 26 converts the sliding friction between the output shaft 123 and the inner wall of the mounting hole 25 into rolling friction, thereby reducing frictional loss between the output shaft 123, lowering energy loss of the drive assembly 11, and improving the transmission efficiency of the electric valve.

[0067] Furthermore, a washer 27 is disposed within the mounting hole 25. The washer 27 is positioned on the side of the bearing 26 away from the limiting boss 124. The washer 27 cooperates with the outer ring of the bearing 26 to limit the lower position of the bearing 26, while the limiting boss 124 cooperates with the inner ring of the bearing 26 to limit the upper position of the bearing 26. Through this arrangement, the washer 27 cooperates with the limiting boss 124 to axially limit the bearing 26, preventing the bearing 26 from falling off and ensuring the effective use of the bearing 26. At the same time, the cooperation between the limiting boss 124 and the bearing 26 also enables the bottom plate 12241 to be away from the bottom of the mounting cavity 21, thereby forming a gap between the bottom plate 12241 and the bottom of the mounting cavity 21, thereby ensuring that the impurity flow channel 100 can flow freely.

[0068] Specifically as shown in Figure 11, the mounting hole 25 includes a first hole section 251 and a second hole section 252 that are connected to each other. The first hole section 251 is arranged close to the mounting cavity 21. The inner diameter of the first hole section 251 is larger than the inner diameter of the second hole section 252. A step surface is formed between the first hole section 251 and the second hole section 252. The end of the washer 27 away from the bearing 26 abuts against the step surface, so as to ensure the accurate positioning of the washer 27, the bearing 26 and the reduction assembly 12, thereby improving the stability of the overall assembly of the electric valve.

[0069] 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.

[0070] Unless otherwise specifically stated, 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. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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. An electric valve, characterized in that: The electric valve comprises: A driving device (10) comprises a driving assembly (11) and a reduction assembly (12), wherein the driving assembly (11) is drivingly connected to the reduction assembly (12), and the reduction assembly (12) has a housing (121), wherein the housing (121) forms an accommodating cavity, and a reduction wheel set (122) is arranged in the accommodating cavity; The valve body assembly (20) has a mounting cavity (21) and a communication cavity (22), and the driving device (10) is arranged in the mounting cavity (21); A valve core assembly (30) is arranged in the communicating cavity (22), the valve core assembly (30) has a circulation channel (31), the circulation channel (31) is used to circulate refrigerant, the valve core assembly (30) has a drive shaft (32), the drive shaft (32) is drivingly connected to the reduction assembly (12), the drive shaft (32) has a circulation hole (321) arranged therethrough, one end of the circulation hole (321) is communicated with the mounting cavity (21), and the other end of the circulation hole (321) is communicated with the circulation channel (31); An impurity flow channel (100) is provided between the deceleration assembly (12) and the valve body assembly (20), and the impurity flow channel (100) is connected to the accommodating cavity and the circulation hole (321) respectively, so that impurities in the accommodating cavity can enter the circulation channel (31) through the impurity flow channel (100).

2. The electric valve according to claim 1, characterized in that A balancing channel (200) is provided on the housing (121), the driving assembly (11) has a rotating chamber (111), a driving component (112) is provided in the rotating chamber (111), one end of the balancing channel (200) is communicated with the accommodating chamber, and the other end of the balancing channel (200) is communicated with the rotating chamber (111) to balance the pressure in the circulation channel (31) and the impurity flow channel (100).

3. The electric valve according to claim 1, characterized in that The reduction assembly (12) further comprises an output shaft (123), the output shaft (123) being arranged on the reduction wheel assembly (122) and being drivingly connected to the drive shaft (32), the output shaft (123) comprising a first communicating hole (101), one end of the first communicating hole (101) being in communication with the circulation hole (321), and the other end of the first communicating hole (101) being in communication with the accommodating cavity.

4. The electric valve according to claim 3, characterized in that The reduction wheel group (122) includes an output wheel (1224), and the output wheel (1224) includes a base plate (12241) and an internal gear (12242). The internal gear (12242) and the output shaft (123) are arranged on both sides of the base plate (12241) relative to each other. The internal gear (12242) is rotatably arranged in the accommodating cavity. The output shaft (123) is drivingly connected to the output wheel (1224). A second connecting hole (102) is provided on the side wall of the output shaft (123), and a third connecting hole (103) is provided on the base plate (12241). The first connecting hole (101), the second connecting hole (102), and the third connecting hole (103) are connected in sequence to form the impurity flow channel (100).

5. The electric valve according to claim 4, characterized in that: The reduction gear set (122) further includes a sun gear (1221), planetary gears (1222), a fixed gear (1223), a first connecting plate (1225) and a second connecting plate (1226); the sun gear (1221) is drivingly connected to the driving assembly (11); a plurality of planetary gears (1222) are provided, and the plurality of planetary gears (1222) are respectively engaged with the sun gear (1221); the fixed gear (1223) is fixedly provided and sleeved on the outside of the plurality of planetary gears (1222); a plurality of The outer teeth of the planetary gears (1222) are meshed with the inner teeth of the fixed gear (1223); one end of the plurality of planetary gears (1222) close to the driving assembly (11) is rotatably connected to the first connecting plate (1225); the other ends of the plurality of planetary gears (1222) are rotatably connected to the second connecting plate (1226); the inner gear (12242) is sleeved on the outer sides of the plurality of planetary gears (1222); and the outer teeth of the plurality of planetary gears (1222) are meshed with the inner gear (12242).

6. The electric valve according to claim 4, characterized in that There is a gap between the bottom plate (12241) and the bottom of the installation cavity (21), and the second communicating hole (102) and the third communicating hole (103) are connected through the gap.

7. The electric valve according to claim 4, characterized in that There are multiple second communicating holes (102), and the multiple second communicating holes (102) are arranged at annular intervals on the side wall of the output shaft (123); and / or there are multiple third communicating holes (103), and the multiple third communicating holes (103) are arranged at annular intervals on the bottom plate (12241).

8. The electric valve according to claim 6, characterized in that The bottom plate (12241) is provided with a socket (12243), the output shaft (123) is inserted into the socket (12243), and a rotation-stopping structure is provided between the socket (12243) and the side wall of the output shaft (123), and the rotation-stopping structure is used to limit the rotation of the output shaft (123) relative to the reduction wheel set (122).

9. The electric valve according to claim 8, characterized in that The inner wall of the insertion hole (12243) has a cut surface (12244), the output shaft (123) has a connecting section (1231), and the shape of the inner wall of the insertion hole (12243) is adapted to the outer peripheral shape of the connecting section (1231) to form the anti-rotation structure.

10. The electric valve according to claim 8, characterized in that The reduction wheel assembly (122) has a limiting boss (124) on one side facing the output shaft (123), and the limiting boss (124) is arranged around the outer periphery of the insertion hole (12243).

11. The electric valve according to claim 10, characterized in that The limiting boss (124) has a circulation groove (1241), and the circulation groove (1241) is respectively connected to the second communication hole (102) and the interval.

12. The electric valve according to claim 3, characterized in that The output shaft (123) is provided with a plug-in slot (1232), and the drive shaft (32) is engaged with the plug-in slot (1232) in a circumferential upper limit position to limit the rotation of the drive shaft (32) relative to the output shaft (123).

13. The electric valve according to claim 1, characterized in that A limiting structure is provided between the deceleration assembly (12) and the mounting cavity (21), and the limiting structure is used to limit the rotation range of the deceleration assembly (12).

14. The electric valve according to claim 13, characterized in that A limiting column (125) is provided on one side of the deceleration assembly (12) facing the bottom of the installation cavity (21); the bottom of the installation cavity (21) has a limiting groove (211); and the limiting column (125) is provided in the limiting groove (211).

15. The electric valve according to claim 14, characterized in that The reduction wheel assembly (122) includes an output wheel (1224), the reduction assembly (12) is drivingly connected to the valve core assembly (30) via the output wheel (1224), the limiting column (125) is arranged on the output wheel (1224), and the limiting column (125) and the output wheel (1224) are integrally formed by powder metallurgy or injection molding.

16. The electric valve according to claim 14, characterized in that An isolation boss (212) is provided in a ring shape around the periphery of the limiting groove (211), and the isolation boss (212) extends toward the direction of the deceleration assembly (12).

17. The electric valve according to claim 11, characterized in that The valve body assembly (20) has a mounting hole (25), the communicating cavity (22) and the mounting cavity (21) are respectively arranged at two ends of the mounting hole (25), the valve core assembly (30) is inserted into the mounting hole (25) and connected to the output shaft (123), and a bearing (26) is provided between the outer wall of the output shaft (123) and the inner wall of the mounting hole (25).

18. The electric valve according to claim 17, characterized in that A washer (27) is provided in the mounting hole (25). The washer (27) is provided on a side of the bearing (26) away from the limiting boss (124). The washer (27) is limitedly matched with the outer ring of the bearing (26) to form a lower limit for the bearing (26). The limiting boss (124) is limitedly matched with the inner ring of the bearing (26) to form an upper limit for the bearing (26).

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