Motor-operated valve

Abstract

This application discloses an electrically operated valve. The electrically operated valve (100) has a passage partly located between a connecting seat (24) and a fixed ring gear (222) and partly located in the connecting seat (24), and the passage can communicate between a sleeve chamber (250) and a valve body chamber (310). This electrically operated valve has the passage so that powder impurities accumulated in the sleeve chamber can pass through the passage and enter the valve body chamber, which is advantageous in reducing the accumulation of powder impurities.

Description

[Technical field]

[0001] This application claims priority to a Chinese patent application filed with the China Patent Office on March 12, 2021, bearing application number 202110270941.7, and entitled "Motor-operated valve", the entire contents of which are incorporated herein by reference.

[0002] This application relates to motorized valves. [Background technology]

[0003] The motor-operated valve includes a control device, valve components, a valve body and a valve body assembly, the valve components include a transmission mechanism, the specific transmission components may be a planetary gear structure, and the control device operates the valve body of the motor-operated valve through the transmission mechanism to achieve the purpose of switching or turning on / off the fluid. The transmission mechanism may generate powder impurities after a certain period of operation, which may accumulate in the inner chamber of the motor-operated valve, which is detrimental to the steady operation of the motor-operated valve. How to reduce the accumulation of powder impurities in the inner chamber of the motor-operated valve is a technical issue that needs to be improved. Summary of the Invention [Problem to be solved by the invention]

[0004] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a motor-operated valve which is advantageous in reducing the accumulation of powder impurities in the inner chamber of the motor-operated valve. [Means for solving the problem]

[0005] In order to achieve the above object, the present invention adopts the following technical solutions, namely: In an electrically-operated valve comprising a valve part, a valve body unit and a valve body, the valve part comprises a sleeve, a transmission mechanism and a connecting seat, the sleeve has a sleeve chamber, at least a part of the transmission mechanism is located in the sleeve chamber, the sleeve is connected to the connecting seat, the valve body unit has a valve body chamber, the valve body is located in the valve body chamber, the valve body is transmission-connected to the transmission mechanism, and the valve body unit is connected to the connecting seat, the transmission mechanism comprises a fixed ring gear and a planetary gear unit, at least a part of the planetary gear unit is located inside the fixed ring gear, the connecting seat has an accommodating chamber, at least a part of the fixed ring gear is located in the accommodating chamber, and a part of the fixed ring gear abuts against the connecting seat, the electrically-operated valve has a passage, a part of the passage is located between the connecting seat and the fixed ring gear, a part of the passage is located on the connecting seat, and the passage can connect the sleeve chamber and the valve body chamber.

[0006] By providing a passage connecting the sleeve chamber and the valve body chamber, the present application allows powder impurities accumulated in the sleeve chamber to flow through the passage into the valve body chamber, and by controlling the communication between the motor-operated valve and system pipelines / components, the powder impurities that have entered the valve body chamber can enter the system pipelines / components, which is beneficial to reducing the accumulation of powder impurities in the motor-operated valve, and is beneficial to improving the operating condition of the motor-operated valve and increasing its service life. [Brief description of the drawings]

[0007] [Figure 1] 1 is a schematic configuration diagram of one cross section of a motor-operated valve according to a first embodiment. [Diagram 2] FIG. 4 is a schematic cross-sectional view of the motor-operated valve according to the first embodiment; [Diagram 3] FIG. 2 is a schematic cross-sectional view of one of the valve components shown in FIG. 1. [Figure 4] FIG. 2 is an exploded schematic diagram of one of the planetary gear units of each stage shown in FIG. 1. [Diagram 5] FIG. 2 is a schematic three-dimensional view of one angle of the fixed ring gear shown in FIG. 1; [Figure 6] FIG. 2 is a schematic three-dimensional view of the fixed ring gear shown in FIG. 1 from another angle. [Figure 7] FIG. 2 is a schematic diagram of the three-dimensional configuration of the connecting seat shown in FIG. 1 at one angle. [Figure 8] 8 is a schematic diagram showing the configuration of the connecting seat shown in FIG. 7 in terms of a plan view angle. FIG. [Figure 9] 9 is a schematic configuration diagram of the AA cross section of the connecting seat shown in FIG. 8. [Figure 10] FIG. 13 is a schematic diagram showing a three-dimensional configuration of the fitting between the connecting seat and the fixed ring gear. [Figure 11] FIG. 2 is a partial enlarged view of a portion D in FIG. [Figure 12] FIG. 11 is a schematic diagram of a cross-section of one of the valve components of the second embodiment. [Figure 13] FIG. 11 is a schematic configuration diagram of a plan view angle of a connecting seat according to the second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] The present invention will be further described below in conjunction with the drawings and specific embodiments. 1 to 10, the motor-operated valve is applicable to a thermal management system or an air conditioning system of a vehicle, and the motor-operated valve 100 includes a control component 1, a valve component 2, a valve body unit 3 having a valve body chamber 30, and a valve body 4 located in the valve body chamber 30 and power-connected to the valve component 2, the control component 1 is located on the outer periphery of the valve component 2 and is fixedly connected to the valve body unit 3 or connected so as to have a limited position, the valve component 2 is fixedly connected to the valve body unit 3 or connected so as to have a limited position, and the motor-operated valve 100 is electrically connected and / or signal-connected to the outside via the control component 1.

[0009] 1 and 2, in this embodiment, the control component 1 includes an outer housing 11, a stator unit 12, a circuit board 13, an interface part 14, a first pin 15 and a second pin 16, the outer housing 11 and the interface part 14 are molded by injection molding or connected by assembly, the outer housing 11 forms a housing chamber 110, the stator unit 12 and the circuit board 13 are both located in the housing chamber 110, one end of the first pin 15 is electrically connected and / or signal-wise connected to the stator unit 12, and the other end of the first pin 15 is connected to the circuit board 13. The control component 1 and the valve body unit 3 are electrically and / or signal-connected to the circuit board 13, and the second pin 16 is fixedly connected to the interface unit 14. Specifically, in this embodiment, the second pin 16 is an injection insert, and the outer housing 11 and the interface unit 14 are formed by injection, and one end of the second pin 16 is located in the housing chamber 110 and is electrically and / or signal-connected to the circuit board 13, and the other end of the second pin 16 is located in a connector chamber 140 formed in the interface unit 14 and is used for electrically and / or signal-connecting to the outside. In this embodiment, the control component 1 and the valve body unit 3 are connected and fixed by screws, but of course, in other embodiments, the control component 1 and the valve body unit 3 can be connected and fixed by means of welding, adhesive, snap, or the like. Furthermore, a sealed arrangement is also possible between the control component 1 and the valve body unit 3, which is advantageous, on the one hand, to prevent water vapor or other impurities in the outside air from passing through the assembly gap between the control component 1 and the valve body unit 3 into the housing chamber 110 and coming into contact with the stator unit 12, thereby causing corrosion or failure of the stator unit 12, and, on the other hand, to prevent water vapor or other impurities in the outside air from passing through the assembly gap between the control component 1 and the valve body unit 3 into the valve body chamber 30.

[0010] 1-3, the valve part 2 includes a rotor unit 21, a transmission mechanism 22, a valve stem 23, a connecting seat 24, and a sleeve 25, the sleeve 25 has a sleeve chamber 250, the rotor unit 21 is located in the sleeve chamber 250, and the sleeve 25 is fixedly connected to the connecting seat 24, in this embodiment, the sleeve 25 is fixedly connected to the connecting seat 24 by welding, the rotor unit 21 has a rotor chamber 210, the connecting seat 24 has a receiving chamber 240, a part of the transmission mechanism 22 is located in the rotor chamber 210, a part of the transmission mechanism 22 is located in the receiving chamber 240, the transmission mechanism 22 is transmission-connected to the valve stem 23, and the valve stem 23 is transmission-connected to the valve body 4. In this embodiment, the valve body 4 includes a spherical surface or a surface similar to a sphere, but of course, in other embodiments, the valve body 4 may have other shapes such as a cylindrical shape, a circular truncated shape, a tapered shape, a needle shape, and the like. A part of the transmission mechanism 22 is located in the rotor chamber 210, which is advantageous for reducing the axial height of the motor-operated valve 100. In this embodiment, the transmission mechanism 22 is a planetary gear mechanism, but of course, in other embodiments, the transmission mechanism 22 is not limited to the planetary gear mechanism.

[0011] 3 and 4, the rotor unit 21 includes a rotor magnetic ring 211 and a connecting plate 212, and the rotor magnetic ring 211 is formed by injection with the connecting plate 212 as an injection insert, and the transmission mechanism 22 includes a sun gear 221, and the connecting plate 212 is fixedly connected to the sun gear 221. Of course, in other embodiments, the connecting plate 212 and the sun gear 221 can also be injection molded. The transmission mechanism 22 further includes a fixed ring gear 222 and at least one stage of a planetary gear unit, and the fixed ring gear 222 has an internal tooth portion 2223 formed by protruding inward along the radial direction of the fixed ring gear 222. The transmission mechanism 22 can be provided with a multi-stage planetary gear unit depending on the gear ratio required. In this embodiment, the transmission mechanism 22 includes a first planetary gear unit 223, a second planetary gear unit 224, a third planetary gear unit 225 and an output planetary gear unit 226, in that order, along the axial direction of the transmission mechanism 22. The fixed ring gear 222 is located on the outer periphery of the planetary gear unit, a portion of the fixed ring gear 222 is located in the rotor chamber 210, a portion of the fixed ring gear 222 is located in the accommodating chamber 240, and the fixed ring gear 222 abuts against the connecting seat 24. Since the first planetary gear unit 223, the second planetary gear unit 224 and the third planetary gear unit 225 have the same structure, taking the first planetary gear unit 223 as an example, the first planetary gear unit 223 includes a first planetary gear 2231, a first carrier 2232 and a first column gear 2233, and the first carrier 2232 and the first column gear 2233 can be injection molded or assembled and fixed, and in this embodiment, the first carrier 2232 and the first column gear 2233 are molded by injection.The first planetary gear unit 223 further includes first positioning shafts 2234, the number of which is the same as the number of the first planetary gears 2231. In this embodiment, the number of the first positioning shafts 2234 and the first planetary gears 2231 are both three. The first positioning shafts 2234 are distributed along a circumference, such as the outer edge of the first carrier 2232. The first positioning shafts 2234 and the first carrier 2232 can be injection molded or fixed by assembly. The first planetary gears 2231 are located on the outer periphery of the first positioning shafts 2234. The first planetary gears 2231 are rotatably mounted on the first carrier 2232 by the first positioning shafts 2234. The first planetary gears 2231 are gear-meshed with the sun gear 221. The first planetary gears 2231 are also gear-meshed with the internal teeth portion 2223 of the fixed ring gear 222. In order to prevent the first planetary gear 2231 from moving along the axial direction of the first positioning shaft 2234 when the first planetary gear 2231 rotates, in this embodiment, the valve part 2 further includes a bearing 26 located on the outer periphery of the sun gear 221 and intermediately fitted with the sun gear 221, and a gasket 27 located on the outer periphery of the sun gear 221 and capable of gap-fitting with the sun gear 221. The sun gear 221 includes a protrusion 2211, and the bearing 26 is in contact with the protrusion 2211 and the gasket 27 along the axial direction of the sun gear 221. The fixed ring gear 222 includes a third step portion 2224 located above the first planetary gear 2231, and the gasket 27 is located above the third step portion 2224 and abuts against the third step portion 2224. In this manner, the first planetary gear 2231 can be restricted in position in the axial direction by the gasket 27 and the first carrier 2232. The provision of the bearing 26 is also advantageous in ensuring the concentricity of the sun gear 221 and the fixed ring gear 222.

[0012] Similarly, the second planetary gear unit 224 includes a second planetary gear, a second carrier, a second column gear, and a second positioning shaft, the second planetary gear is located on the outer periphery of the second positioning shaft, the second planetary gear is gear meshed with the first column gear, the second planetary gear is gear meshed with the fixed ring gear 222, and the second planetary gear is axially restricted in position by the first carrier and the second carrier, and the third planetary gear unit 225 includes a third planetary gear, a third carrier, a third column gear, and a third positioning shaft, the third planetary gear is located on the outer periphery of the third positioning shaft, the third planetary gear is gear meshed with the second column gear, the third planetary gear is gear meshed with the fixed ring gear 222, and the third planetary gear is axially restricted in position by the second carrier and the third carrier. The output planetary gear unit 226 includes a fourth planetary gear, a fourth positioning shaft and an output carrier 2261, and the output carrier 2261 and the valve rod 23 realize the transmission connection by injection molding or assembly fixing. In this embodiment, the valve rod 23 and the output carrier 2261 are molded by injection molding, the fourth planetary gear is located on the outer periphery of the fourth positioning shaft, the fourth planetary gear is gear meshed with the third column gear, the fourth planetary gear is gear meshed with the fixed ring gear, and the fourth planetary gear is axially position-limited by the third carrier and the output carrier. It should be noted that the transmission mechanism 22 can be a plastic part or a metal part. In this embodiment, the transmission mechanism 22 is a metal part, and each part of the transmission mechanism 22 can be injection molded with powder metallurgy material, so that each part of the transmission mechanism 22 has good wear resistance.

[0013] 1 and 2, the valve body unit 3 includes a valve body 31, a first flow path 311 and a second flow path 312, the valve body 31 has a valve body chamber 30, the valve body 4 is located in the valve body chamber 30, the valve part 2 is driven and connected to the valve body 4 by the valve rod 23, and the valve part 2 is fixedly connected to the valve body 31, specifically, in this embodiment, the valve part 2 and the valve body 31 are fixedly connected by the crimp nut 5, of course, in other embodiments, the valve part 2 and the valve body 31 can be fixed by means of welding, adhesive, screw connection, etc. Furthermore, a sealing arrangement can be made between the valve part 2 and the valve body unit 3, which is advantageous to prevent the fluid from leaking out from the assembly gap between the valve part 2 and the valve body unit 3. The valve body 4 has a via hole 41 penetrating the valve body 4, and the via hole 41 can be connected or disconnected to the first flow path 311 and the second flow path 312 by rotating the valve body 4. In other words, the motor-operated valve 100 can control the on / off of the fluid by rotating the valve body 4. In this embodiment, the motor-operated valve 100 is a two-way valve, but of course, in other embodiments, the motor-operated valve may be a three-way valve, a four-way valve, or other multi-way valve.

[0014] The working principle of the motor-operated valve 100 is that after the control part 1 is energized, an excitation magnetic field is generated in the stator unit 12, and the rotor unit 21 rotates the sun gear 221 under the excitation of magnetic force, and the sun gear 221 meshes with the first planetary gear 2231, and the first planetary gear 2231 also meshes with the fixed ring gear 222, and the fixed ring gear 222 is fixedly arranged. Thus, the first planetary gear 2231 rotates on its own axis and rotates the first carrier 2232 by the first positioning shaft 2234, and the rotation of the first carrier 2232 also rotates the first column gear 2233, and the first column gear 2233 also meshes with the second planetary gear, and the second planetary gear meshes with the fixed ring gear 222, that is, under the action of the first column gear 2233, the first carrier 2232 rotates on its own axis and rotates on the first column gear 2233, and the first column gear 2233 also meshes with the second planetary gear, and the second planetary gear meshes with the fixed ring gear 222, that is, the first column gear 2233 rotates on its own axis and rotates on the first column gear 2234, and the second ... rotates on the second column gear 2233, and the second column gear meshes with the second planetary gear, and the second column gear meshes with the second planetary gear, and the second column gear meshes with the second planetary gear, and the second column gear meshes with the second planetary gear, and the second column gear meshes with the second planetary gear, and the second column The second planetary gear rotates the second carrier through the second positioning shaft, the second carrier rotates the second column gear, the second column gear again meshes with the third planetary gear, the third planetary gear again meshes with the fixed ring gear 222, and by analogy, finally, the fourth planetary gear rotates the output carrier 2261 through the fourth positioning shaft, the output carrier 2261 and the valve stem 23 are injection molded, the output carrier 2261 again rotates the valve stem 23, the valve stem 23 is power-transmitted to the valve body 4, the rotation of the valve stem 23 rotates the valve body 4, and with the rotation of the valve body 4, the via hole 41 of the valve body 4 can be connected or disconnected to the first flow path 311 and the second flow path 312, so that the motor-operated valve 100 can turn on and off the fluid.

[0015] As shown in Figures 7 to 9, the connecting seat 24 includes a main body portion 241 and a second flange portion 242 extending radially outward from the outer periphery of the side wall of the main body portion 241, and the crimp nut 5 is externally fitted onto the radial outer periphery of the side wall of the main body portion 241 of the connecting seat, the crimp nut 5 abuts against the upper surface of the second flange portion 242, and the crimp nut 5 is screwed into the valve body 31, thereby fixedly connecting the connecting seat 24 to the valve body 31. The main body 241 forms the accommodation chamber 240, and has one through hole 2413 as one opening of the accommodation chamber 240, and the through hole 2413 is located in the center of the main body 241 in the axial direction, and the main body 241 includes a first step portion 2411 and a second step portion 2412, and the second step portion 2412 is provided on the valve body 4 closer to the first step portion 2411 along the axial direction of the connecting seat 24. The main body 241 further includes a positioning portion 2414 located above the second step portion 2412, the number of which is one or more, and in this embodiment, the number of the positioning portions is two, and the two positioning portions 2414 are provided symmetrically with respect to the axis of the connecting seat 24. The connecting seat 24 is located at the upper end of the main body 241, and further includes a crimping portion 2415 for fixed connection with the fixed ring gear 222. The connecting seat 24 may be a metal part, for example, made of stainless steel and machined to have the desired structure and shape.

[0016] As shown in Figs. 5 and 6, the fixed ring gear 222 has a first flange portion 2221 that is located at one end of the fixed ring gear 222 close to the valve body 31 and extends radially outward from the outer circumferential wall of the fixed ring gear 222. The fixed ring gear 222 has a fitting portion 2222 that fits with the positioning portion 2414, and the fitting portion 2222 is formed by protruding from the outer periphery of the first flange portion 2221. In this embodiment, the positioning portion 2414 of the connecting seat 24 is a semicylindrical recess, and accordingly, the fitting portion 2222 is a semicylindrical protrusion that matches the recess. The shapes of the positioning portion 2414 and the fitting portion 2222 are not limited to the semicylindrical shape shown in the drawings, but may be other shapes such as a triangle or a rectangle, and the positioning portion 2414 may be a protrusion and the corresponding fitting portion 2222 may be a recess.

[0017] 10, which is a schematic diagram of the fitting configuration between the fixed ring gear 222 and the connecting seat 24. The fixed ring gear 222 and the connecting seat 24 are fixedly connected. When assembling, the fixed ring gear 222 is first pressed into the connecting seat 24 from top to bottom, so that the lower surface of the first flange portion 2221 of the fixed ring gear 222 abuts against the first step portion 2411, the outer circumferential surface of the first flange portion 2412 abuts against the inner circumferential surface of the side wall of the main body portion 241 of the connecting seat, the fitting portion 2222 of the fixed ring gear 222 fits into the positioning portion 2414 of the connecting seat 24, and then the crimping portion 2415 of the connecting seat 24 is fixed to the fixed ring gear 222 by crimping. Of course, in another embodiment, the fixed ring gear 222 and the connecting seat 24 can also be fixedly connected by means of welding or bonding. A part of the output carrier 2261 on which the valve rod 23 is injection molded is connected to the valve body 4 through a through hole 2413, and a part of the output carrier 2261 abuts against the second stepped portion 2412, and is axially positionally restricted and supported by the second stepped portion 2412 relative to the output carrier 2261, and there is a certain gap between the lower end surface of the fixed ring gear 222 and the upper end surface of the second stepped portion 2412.

[0018] During operation of the motor-operated valve, in the transmission mechanism 22, friction losses occur between the sun gear 221 and the planetary gear unit, between the planetary gear units, and between the planetary gear unit and the fixed ring gear 222, etc., which generates a small amount of powder impurities. The powder impurities may accumulate on the outer periphery of the fixed ring gear 222, at the lower end of the rotor magnetic ring 211, and in the sleeve chamber 250 located at the upper end of the connecting seat 24. Eventually, the powder impurities may be adsorbed to the surface of the rotor magnetic ring 211, increasing the frictional resistance between the rotor unit 21 and the sleeve 25, which may be detrimental to the steady operation of the motor-operated valve. For this reason, the electric valve in this embodiment includes a passage connecting the sleeve chamber 250 and the valve body chamber 310, and specifically, the connecting seat 24 further has a conductive portion 2416 provided axially along the inner wall of the main body portion 241, and the thickness of the portion of the main body portion where the conductive portion 2416 is located is smaller than the thickness of the portion of the main body portion where no conductive portion is provided, so that there is a gap between the outer peripheral surface of the first flange portion 2221 of the fixed ring gear 222 and the inner wall of the main body portion 241 of the connecting seat at the portion where the conductive portion 2416 is provided. The lower end surface of the conductive portion 2416 is located below the lower end surface of the fixed ring gear 222, and the lower end surface of the fixed ring gear 222 is located below the upper surface of the first step portion 2411 or the lower end surface of the fixed ring gear 222 abuts against the upper surface of the first step portion 2411, so that the lower end surface of the conductive portion 2416 is located below the upper surface of the first step portion 2411, and the presence of the conductive portion 2416 makes the first step portion 2411 not a sealed annular step. The number of the conductive portions 2416 may be one or more. The connecting seat 24 further has a conductive hole 2417 provided in the axial direction and penetrating the second step portion 2412, and the conductive hole 2412 is at least partially located outside the output carrier 2261, so that the output carrier 2261 does not completely cover the conductive hole 2412 and the conductive hole 2412 does not fail to perform the conductive function. The number of the through holes 2412 may be one or more.

[0019] There is a gap between the outer peripheral surface of the first flange portion 2221 of the fixed ring gear 222 and the inner peripheral wall of the main body portion 241 of the connecting seat at the conductive portion 2416, and the lower end surface of the conductive portion 2416 is located below the lower end surface of the fixed ring gear 222, and there is also a certain gap from the lower end surface of the fixed ring gear 222 to the upper end surface of the second stepped portion 2412. Therefore, the conductive portion 2416 can communicate with the conductive hole 2417 through the gap from the lower end surface of the fixed ring gear 222 to the upper end surface of the second stepped portion 2412, and the passage is 16, the gap from the lower end surface of the fixed ring gear 222 to the second stepped portion 2412, and the through hole 2417. Referring to FIG. 11, this passage connects the sleeve chamber 250 located on the outer periphery of the fixed ring gear 222, the lower end of the rotor magnetic ring 211, and the upper end of the connecting seat 24, and the valve body chamber 310 in which the valve body 4 is located. Since the sleeve chamber 250 connects to the rotor chamber 210, the powder impurities deposited in the sleeve chamber 250 can pass through the passage and enter the rotor chamber 210 and the valve body chamber 310. In particular, when the motor-operated valve is started or closed, the powder impurities can move upward through the passage to enter the rotor chamber 210 or move downward to enter the valve body chamber 310 under the action of the pressure difference. Due to the fitting gap between the valve body 4 and the valve body seat 331, powder impurities in the valve body chamber 310 can enter the via hole 41 of the valve body 4 and the first flow path 311 and the second flow path 312 connected to the via hole 41, and can enter the system pipelines or parts connected to the electric valve through the first flow path 311 and the second flow path 312, which is advantageous in reducing the accumulation of powder impurities and improving the life of the electric valve.

[0020] In this embodiment, in order to facilitate processing and installation, the conductive part 2416 and the positioning part 2414 have the same structure, both of which are approximately semi-cylindrical recesses, and the number of each recess is two, i.e., a total of four recesses are provided, which are distributed along the circumference and symmetrical with respect to the axis, two of which are provided. Since the conductive part 2416 and the positioning part 2414 have the same structure, the recesses symmetrical with respect to the two axes can be fitted with the fitting part 2222 of the fixed ring gear 222 to play a role of positioning as a positioning part, and the remaining two recesses symmetrical with respect to the axis can realize a communication function as a conductive part. The configurations of the conductive part and the positioning part may be different, for example, the conductive part may be rectangular, the positioning part is a semi-cylindrical recess, and the fitting part is a semi-cylindrical protrusion, and it goes without saying that the positioning part and the fitting part are fitted with each other to be positioned.

[0021] 12-13, FIG. 12 is a schematic diagram of one cross-section of the second embodiment of the valve part of the motor-operated valve. Different from the first embodiment, in this embodiment, the through hole 2417' is located below the through hole 2416', the passage includes the through hole 2416' and the through hole 2417', the passage communicates the sleeve chamber and the valve body chamber, and the powder impurities deposited in the sleeve chamber can enter the rotor chamber and the valve body chamber communicating with the sleeve chamber through the passage. If the configuration of the connecting seat 24' allows, it can be installed as in this embodiment. Since it is necessary to provide a seal ring at the bottom of the connecting seat to prevent the working medium from leaking to the outside, if the connecting seat is provided with a through hole below the through hole as shown in FIG. 1, the position for installing the seal ring will be insufficient, so it is necessary to make a significant adjustment to the configuration of the bottom of the connecting seat or the position of the seal ring, such as by increasing the diameter of the bottom of the connecting seat, and the configuration of the valve body unit also needs to be adjusted accordingly. The structure of the valve body unit after adjustment and the position of the seal ring are not introduced in this embodiment, but those skilled in the art can design and adjust them by themselves.

[0022] Referring to Figure 13, Figure 13 is a schematic diagram of the plan view angle of the second embodiment of the connecting seat. Different from the first embodiment, in this embodiment, the configuration of the conductive portion 2416' and the positioning portion 2414' is different, the conductive portion 2416' is an approximately rectangular recess, the positioning portion 2414' is still the same semi-cylindrical recess as in the previous embodiment, the fitting portion of the corresponding fixed ring gear is a semi-cylindrical protrusion, and the positioning portion 2414' and the fitting portion are fitted together to position them. By designing in this way, it is possible to play a role of error proofing and avoid assembly errors.

[0023] It should be noted here that the above examples are only for illustrating the present invention, and do not limit the technical solutions described in the present invention. Although the present specification has already described the present invention in detail with reference to the above examples, those skilled in the art can understand that the skilled person in the art to which the invention pertains may still make amendments or equivalent substitutions to the present invention, and all improvements that do not deviate from the spirit and scope of the present invention fall within the scope of the claims of the present invention.

Claims

1. an electrically operated valve comprising a valve part, a valve body unit and a valve body, the valve part comprising a sleeve, a transmission mechanism and a connecting seat, the sleeve having a sleeve chamber, at least a part of the transmission mechanism being located in the sleeve chamber and the sleeve being connected to the connecting seat, the electrically operated valve having a valve body chamber, the valve body being located in the valve body chamber, the valve body being transmission-connected to the transmission mechanism, and the valve body unit being connected to the connecting seat, the transmission mechanism comprising a fixed ring gear and a planetary gear unit, at least a part of the planetary gear unit being located inside the fixed ring gear, the connecting seat having an accommodating chamber, at least a part of the fixed ring gear being located in the accommodating chamber and a part of the fixed ring gear abutting against the connecting seat, the electrically operated valve having a passage, a part of the passage being located between the connecting seat and the fixed ring gear, a part of the passage being located on the connecting seat, the passage communicating between the sleeve chamber and the valve body chamber.

2. The electric valve according to claim 1, characterized in that the connecting seat is located on a side of the connecting seat closer to the fixed ring gear, and has a conductive portion provided in the axial direction of the connecting seat, and a conductive hole provided in the axial direction of the connecting seat and penetrating the connecting seat.

3. 3. The electric valve according to claim 2, characterized in that there is a gap between a lower end surface of the fixed ring gear and the connecting seat, the lower end surface of the conductive portion is closer to the valve body than the lower end surface of the fixed ring gear, the conductive portion communicates with the conductive hole through the gap between the lower end surface of the fixed ring gear and the connecting seat, and the passage includes the conductive portion, the gap between the lower end surface of the fixed ring gear and the connecting seat, and the conductive hole.

4. 3. The motor-operated valve according to claim 2, wherein the introducing hole is located below the introducing portion, and the introducing portion is in communication with the introducing hole.

5. 5. The electric valve according to claim 3 or 4, characterized in that the connecting seat includes a first step portion and a second step portion, the second step portion is closer to the valve body than the first step portion, the fixed ring gear has a first flange portion whose lower surface abuts against the first step portion, the lower end surface of the conductive portion is located below the upper end surface of the first step portion, and the conductive portion is recessed so that there is a set gap between the connecting seat and the outer peripheral surface of the first flange portion at the conductive portion.

6. The motor-operated valve according to claim 5, characterized in that the through hole penetrates the second step portion along the axial direction, there is a gap between a lower end surface of the fixed ring gear and an upper end surface of the second step portion, and the passage includes the through portion, the gap between the lower end surface of the fixed ring gear and the upper end surface of the second step portion, and the through hole.

7. The electric valve described in claim 5, characterized in that the connecting seat includes positioning portions located on the inner circumference of the connecting seat, the number of which is two or more, and a crimping portion located on the upper part of the connecting seat, the fixed ring gear includes mating portions located on the outer circumference of the first flange portion, the mating portions and the positioning portions mated with each other, and the connecting seat is fixedly connected to the fixed ring gear by crimping.

8. The electric valve according to claim 7, characterized in that the positioning portion is a recess and the fitting portion is a protrusion that fits into the positioning portion, or the positioning portion is a protrusion and the fitting portion is a recess that fits into the positioning portion.

9. The motor-operated valve according to claim 5, characterized in that the planetary gear unit includes an output carrier, the motor-operated valve further includes a valve stem, the output carrier and the valve stem are fixedly connected or injection molded, at least a portion of the output carrier is located in an accommodating chamber of the connecting seat, the output carrier abuts against the second step portion, the connecting seat further includes a through hole provided in the axial direction, and the valve stem is connected to the valve body through the through hole.

10. The motor-operated valve according to claim 6, characterized in that the planetary gear unit includes an output carrier, the motor-operated valve further includes a valve stem, the output carrier and the valve stem are fixedly connected or injection molded, at least a portion of the output carrier is located in an accommodating chamber of the connecting seat, the output carrier abuts against the second step portion, the connecting seat further includes a through hole provided in the axial direction, and the valve stem is connected to the valve body through the through hole.

11. The electric valve according to any one of claims 2 to 4 or 6 to 10, characterized in that the connecting seat includes a main body portion and a second flange portion extending radially outward from the outer periphery of the side wall of the main body portion, the electric valve further includes a crimp nut fitted onto the radial outer periphery of the side wall of the main body portion, the crimp nut abutting against an upper surface of the second flange portion, the crimp nut being screwed to the valve body unit, and the conducting portion and the conducting hole being located on the inner periphery of the side wall of the main body portion.

12. The electric valve described in claim 5, characterized in that the connecting seat includes a main body portion and a second flange portion extending radially outward from the outer periphery of the side wall of the main body portion, the electric valve further includes a crimp nut fitted onto the radial outer periphery of the side wall of the main body portion, the crimp nut abutting an upper surface of the second flange portion, the crimp nut being screwed to the valve body unit, and the conducting portion and the conducting hole being located on the inner periphery of the side wall of the main body portion.

13. The motor-operated valve according to claim 11, characterized in that the valve body has a via hole, the valve body unit has a first flow path and a second flow path, and by rotating the valve body, the via hole can be connected or disconnected from the first flow path and the second flow path.

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